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pigweed / third_party / github / FreeRTOS / FreeRTOS-Kernel / 9c0c37ab9b56f2c90085b78df2f58b5833e473db / . / FreeRTOS-Plus / Source / WolfSSL / wolfcrypt / src / asn.c
blob: e3d9ff44bd3c934c12cf28c3f6ed628c278110df [file] [log] [blame]
/* asn.c
*
* Copyright (C) 2006-2015 wolfSSL Inc.
*
* This file is part of wolfSSL. (formerly known as CyaSSL)
*
* wolfSSL is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* wolfSSL is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <wolfssl/wolfcrypt/settings.h>
#ifndef NO_ASN
#ifdef HAVE_RTP_SYS
#include "os.h" /* dc_rtc_api needs */
#include "dc_rtc_api.h" /* to get current time */
#endif
#include <wolfssl/wolfcrypt/asn.h>
#include <wolfssl/wolfcrypt/coding.h>
#include <wolfssl/wolfcrypt/md2.h>
#include <wolfssl/wolfcrypt/hmac.h>
#include <wolfssl/wolfcrypt/error-crypt.h>
#include <wolfssl/wolfcrypt/pwdbased.h>
#include <wolfssl/wolfcrypt/des3.h>
#include <wolfssl/wolfcrypt/logging.h>
#include <wolfssl/wolfcrypt/random.h>
#ifndef NO_RC4
#include <wolfssl/wolfcrypt/arc4.h>
#endif
#ifdef HAVE_NTRU
#include "ntru_crypto.h"
#endif
#if defined(WOLFSSL_SHA512) || defined(WOLFSSL_SHA384)
#include <wolfssl/wolfcrypt/sha512.h>
#endif
#ifndef NO_SHA256
#include <wolfssl/wolfcrypt/sha256.h>
#endif
#ifdef HAVE_ECC
#include <wolfssl/wolfcrypt/ecc.h>
#endif
#ifdef WOLFSSL_DEBUG_ENCODING
#ifdef FREESCALE_MQX
#include <fio.h>
#else
#include <stdio.h>
#endif
#endif
#ifdef _MSC_VER
/* 4996 warning to use MS extensions e.g., strcpy_s instead of XSTRNCPY */
#pragma warning(disable: 4996)
#endif
#ifndef TRUE
#define TRUE 1
#endif
#ifndef FALSE
#define FALSE 0
#endif
#ifdef HAVE_RTP_SYS
/* uses parital <time.h> structures */
#define XTIME(tl) (0)
#define XGMTIME(c, t) my_gmtime((c))
#define XVALIDATE_DATE(d, f, t) ValidateDate((d), (f), (t))
#elif defined(MICRIUM)
#if (NET_SECURE_MGR_CFG_EN == DEF_ENABLED)
#define XVALIDATE_DATE(d,f,t) NetSecure_ValidateDateHandler((d),(f),(t))
#else
#define XVALIDATE_DATE(d, f, t) (0)
#endif
#define NO_TIME_H
/* since Micrium not defining XTIME or XGMTIME, CERT_GEN not available */
#elif defined(MICROCHIP_TCPIP_V5) || defined(MICROCHIP_TCPIP)
#include <time.h>
#define XTIME(t1) pic32_time((t1))
#define XGMTIME(c, t) gmtime((c))
#define XVALIDATE_DATE(d, f, t) ValidateDate((d), (f), (t))
#elif defined(FREESCALE_MQX)
#define XTIME(t1) mqx_time((t1))
#define XGMTIME(c, t) mqx_gmtime((c), (t))
#define XVALIDATE_DATE(d, f, t) ValidateDate((d), (f), (t))
#elif defined(WOLFSSL_MDK_ARM)
#if defined(WOLFSSL_MDK5)
#include "cmsis_os.h"
#else
#include <rtl.h>
#endif
#undef RNG
#include "wolfssl_MDK_ARM.h"
#undef RNG
#define RNG wolfSSL_RNG /*for avoiding name conflict in "stm32f2xx.h" */
#define XTIME(tl) (0)
#define XGMTIME(c, t) wolfssl_MDK_gmtime((c))
#define XVALIDATE_DATE(d, f, t) ValidateDate((d), (f), (t))
#elif defined(USER_TIME)
/* user time, and gmtime compatible functions, there is a gmtime
implementation here that WINCE uses, so really just need some ticks
since the EPOCH
*/
struct tm {
int tm_sec; /* seconds after the minute [0-60] */
int tm_min; /* minutes after the hour [0-59] */
int tm_hour; /* hours since midnight [0-23] */
int tm_mday; /* day of the month [1-31] */
int tm_mon; /* months since January [0-11] */
int tm_year; /* years since 1900 */
int tm_wday; /* days since Sunday [0-6] */
int tm_yday; /* days since January 1 [0-365] */
int tm_isdst; /* Daylight Savings Time flag */
long tm_gmtoff; /* offset from CUT in seconds */
char *tm_zone; /* timezone abbreviation */
};
typedef long time_t;
/* forward declaration */
struct tm* gmtime(const time_t* timer);
extern time_t XTIME(time_t * timer);
#define XGMTIME(c, t) gmtime((c))
#define XVALIDATE_DATE(d, f, t) ValidateDate((d), (f), (t))
#ifdef STACK_TRAP
/* for stack trap tracking, don't call os gmtime on OS X/linux,
uses a lot of stack spce */
extern time_t time(time_t * timer);
#define XTIME(tl) time((tl))
#endif /* STACK_TRAP */
#elif defined(TIME_OVERRIDES)
/* user would like to override time() and gmtime() functionality */
#ifndef HAVE_TIME_T_TYPE
typedef long time_t;
#endif
extern time_t XTIME(time_t * timer);
#ifndef HAVE_TM_TYPE
struct tm {
int tm_sec; /* seconds after the minute [0-60] */
int tm_min; /* minutes after the hour [0-59] */
int tm_hour; /* hours since midnight [0-23] */
int tm_mday; /* day of the month [1-31] */
int tm_mon; /* months since January [0-11] */
int tm_year; /* years since 1900 */
int tm_wday; /* days since Sunday [0-6] */
int tm_yday; /* days since January 1 [0-365] */
int tm_isdst; /* Daylight Savings Time flag */
long tm_gmtoff; /* offset from CUT in seconds */
char *tm_zone; /* timezone abbreviation */
};
#endif
extern struct tm* XGMTIME(const time_t* timer, struct tm* tmp);
#ifndef HAVE_VALIDATE_DATE
#define XVALIDATE_DATE(d, f, t) ValidateDate((d), (f), (t))
#endif
#else
/* default */
/* uses complete <time.h> facility */
#include <time.h>
#define XTIME(tl) time((tl))
#define XGMTIME(c, t) gmtime((c))
#define XVALIDATE_DATE(d, f, t) ValidateDate((d), (f), (t))
#endif
#ifdef _WIN32_WCE
/* no time() or gmtime() even though in time.h header?? */
#include <windows.h>
time_t time(time_t* timer)
{
SYSTEMTIME sysTime;
FILETIME fTime;
ULARGE_INTEGER intTime;
time_t localTime;
if (timer == NULL)
timer = &localTime;
GetSystemTime(&sysTime);
SystemTimeToFileTime(&sysTime, &fTime);
XMEMCPY(&intTime, &fTime, sizeof(FILETIME));
/* subtract EPOCH */
intTime.QuadPart -= 0x19db1ded53e8000;
/* to secs */
intTime.QuadPart /= 10000000;
*timer = (time_t)intTime.QuadPart;
return *timer;
}
#endif /* _WIN32_WCE */
#if defined( _WIN32_WCE ) || defined( USER_TIME )
struct tm* gmtime(const time_t* timer)
{
#define YEAR0 1900
#define EPOCH_YEAR 1970
#define SECS_DAY (24L * 60L * 60L)
#define LEAPYEAR(year) (!((year) % 4) && (((year) % 100) || !((year) %400)))
#define YEARSIZE(year) (LEAPYEAR(year) ? 366 : 365)
static const int _ytab[2][12] =
{
{31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31},
{31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31}
};
static struct tm st_time;
struct tm* ret = &st_time;
time_t secs = *timer;
unsigned long dayclock, dayno;
int year = EPOCH_YEAR;
dayclock = (unsigned long)secs % SECS_DAY;
dayno = (unsigned long)secs / SECS_DAY;
ret->tm_sec = (int) dayclock % 60;
ret->tm_min = (int)(dayclock % 3600) / 60;
ret->tm_hour = (int) dayclock / 3600;
ret->tm_wday = (int) (dayno + 4) % 7; /* day 0 a Thursday */
while(dayno >= (unsigned long)YEARSIZE(year)) {
dayno -= YEARSIZE(year);
year++;
}
ret->tm_year = year - YEAR0;
ret->tm_yday = (int)dayno;
ret->tm_mon = 0;
while(dayno >= (unsigned long)_ytab[LEAPYEAR(year)][ret->tm_mon]) {
dayno -= _ytab[LEAPYEAR(year)][ret->tm_mon];
ret->tm_mon++;
}
ret->tm_mday = (int)++dayno;
ret->tm_isdst = 0;
return ret;
}
#endif /* _WIN32_WCE || USER_TIME */
#ifdef HAVE_RTP_SYS
#define YEAR0 1900
struct tm* my_gmtime(const time_t* timer) /* has a gmtime() but hangs */
{
static struct tm st_time;
struct tm* ret = &st_time;
DC_RTC_CALENDAR cal;
dc_rtc_time_get(&cal, TRUE);
ret->tm_year = cal.year - YEAR0; /* gm starts at 1900 */
ret->tm_mon = cal.month - 1; /* gm starts at 0 */
ret->tm_mday = cal.day;
ret->tm_hour = cal.hour;
ret->tm_min = cal.minute;
ret->tm_sec = cal.second;
return ret;
}
#endif /* HAVE_RTP_SYS */
#if defined(MICROCHIP_TCPIP_V5) || defined(MICROCHIP_TCPIP)
/*
* time() is just a stub in Microchip libraries. We need our own
* implementation. Use SNTP client to get seconds since epoch.
*/
time_t pic32_time(time_t* timer)
{
#ifdef MICROCHIP_TCPIP_V5
DWORD sec = 0;
#else
uint32_t sec = 0;
#endif
time_t localTime;
if (timer == NULL)
timer = &localTime;
#ifdef MICROCHIP_MPLAB_HARMONY
sec = TCPIP_SNTP_UTCSecondsGet();
#else
sec = SNTPGetUTCSeconds();
#endif
*timer = (time_t) sec;
return *timer;
}
#endif /* MICROCHIP_TCPIP */
#ifdef FREESCALE_MQX
time_t mqx_time(time_t* timer)
{
time_t localTime;
TIME_STRUCT time_s;
if (timer == NULL)
timer = &localTime;
_time_get(&time_s);
*timer = (time_t) time_s.SECONDS;
return *timer;
}
/* CodeWarrior GCC toolchain only has gmtime_r(), no gmtime() */
struct tm* mqx_gmtime(const time_t* clock, struct tm* tmpTime)
{
return gmtime_r(clock, tmpTime);
}
#endif /* FREESCALE_MQX */
#ifdef WOLFSSL_TIRTOS
time_t XTIME(time_t * timer)
{
time_t sec = 0;
sec = (time_t) Seconds_get();
if (timer != NULL)
*timer = sec;
return sec;
}
#endif /* WOLFSSL_TIRTOS */
static INLINE word32 btoi(byte b)
{
return b - 0x30;
}
/* two byte date/time, add to value */
static INLINE void GetTime(int* value, const byte* date, int* idx)
{
int i = *idx;
*value += btoi(date[i++]) * 10;
*value += btoi(date[i++]);
*idx = i;
}
#if defined(MICRIUM)
CPU_INT32S NetSecure_ValidateDateHandler(CPU_INT08U *date, CPU_INT08U format,
CPU_INT08U dateType)
{
CPU_BOOLEAN rtn_code;
CPU_INT32S i;
CPU_INT32S val;
CPU_INT16U year;
CPU_INT08U month;
CPU_INT16U day;
CPU_INT08U hour;
CPU_INT08U min;
CPU_INT08U sec;
i = 0;
year = 0u;
if (format == ASN_UTC_TIME) {
if (btoi(date[0]) >= 5)
year = 1900;
else
year = 2000;
}
else { /* format == GENERALIZED_TIME */
year += btoi(date[i++]) * 1000;
year += btoi(date[i++]) * 100;
}
val = year;
GetTime(&val, date, &i);
year = (CPU_INT16U)val;
val = 0;
GetTime(&val, date, &i);
month = (CPU_INT08U)val;
val = 0;
GetTime(&val, date, &i);
day = (CPU_INT16U)val;
val = 0;
GetTime(&val, date, &i);
hour = (CPU_INT08U)val;
val = 0;
GetTime(&val, date, &i);
min = (CPU_INT08U)val;
val = 0;
GetTime(&val, date, &i);
sec = (CPU_INT08U)val;
return NetSecure_ValidateDate(year, month, day, hour, min, sec, dateType);
}
#endif /* MICRIUM */
WOLFSSL_LOCAL int GetLength(const byte* input, word32* inOutIdx, int* len,
word32 maxIdx)
{
int length = 0;
word32 i = *inOutIdx;
byte b;
*len = 0; /* default length */
if ( (i+1) > maxIdx) { /* for first read */
WOLFSSL_MSG("GetLength bad index on input");
return BUFFER_E;
}
b = input[i++];
if (b >= ASN_LONG_LENGTH) {
word32 bytes = b & 0x7F;
if ( (i+bytes) > maxIdx) { /* for reading bytes */
WOLFSSL_MSG("GetLength bad long length");
return BUFFER_E;
}
while (bytes--) {
b = input[i++];
length = (length << 8) | b;
}
}
else
length = b;
if ( (i+length) > maxIdx) { /* for user of length */
WOLFSSL_MSG("GetLength value exceeds buffer length");
return BUFFER_E;
}
*inOutIdx = i;
if (length > 0)
*len = length;
return length;
}
WOLFSSL_LOCAL int GetSequence(const byte* input, word32* inOutIdx, int* len,
word32 maxIdx)
{
int length = -1;
word32 idx = *inOutIdx;
if (input[idx++] != (ASN_SEQUENCE | ASN_CONSTRUCTED) ||
GetLength(input, &idx, &length, maxIdx) < 0)
return ASN_PARSE_E;
*len = length;
*inOutIdx = idx;
return length;
}
WOLFSSL_LOCAL int GetSet(const byte* input, word32* inOutIdx, int* len,
word32 maxIdx)
{
int length = -1;
word32 idx = *inOutIdx;
if (input[idx++] != (ASN_SET | ASN_CONSTRUCTED) ||
GetLength(input, &idx, &length, maxIdx) < 0)
return ASN_PARSE_E;
*len = length;
*inOutIdx = idx;
return length;
}
/* winodws header clash for WinCE using GetVersion */
WOLFSSL_LOCAL int GetMyVersion(const byte* input, word32* inOutIdx, int* version)
{
word32 idx = *inOutIdx;
WOLFSSL_ENTER("GetMyVersion");
if (input[idx++] != ASN_INTEGER)
return ASN_PARSE_E;
if (input[idx++] != 0x01)
return ASN_VERSION_E;
*version = input[idx++];
*inOutIdx = idx;
return *version;
}
#ifndef NO_PWDBASED
/* Get small count integer, 32 bits or less */
static int GetShortInt(const byte* input, word32* inOutIdx, int* number)
{
word32 idx = *inOutIdx;
word32 len;
*number = 0;
if (input[idx++] != ASN_INTEGER)
return ASN_PARSE_E;
len = input[idx++];
if (len > 4)
return ASN_PARSE_E;
while (len--) {
*number = *number << 8 | input[idx++];
}
*inOutIdx = idx;
return *number;
}
#endif /* !NO_PWDBASED */
/* May not have one, not an error */
static int GetExplicitVersion(const byte* input, word32* inOutIdx, int* version)
{
word32 idx = *inOutIdx;
WOLFSSL_ENTER("GetExplicitVersion");
if (input[idx++] == (ASN_CONTEXT_SPECIFIC | ASN_CONSTRUCTED)) {
*inOutIdx = ++idx; /* eat header */
return GetMyVersion(input, inOutIdx, version);
}
/* go back as is */
*version = 0;
return 0;
}
WOLFSSL_LOCAL int GetInt(mp_int* mpi, const byte* input, word32* inOutIdx,
word32 maxIdx)
{
word32 i = *inOutIdx;
byte b = input[i++];
int length;
if (b != ASN_INTEGER)
return ASN_PARSE_E;
if (GetLength(input, &i, &length, maxIdx) < 0)
return ASN_PARSE_E;
if ( (b = input[i++]) == 0x00)
length--;
else
i--;
if (mp_init(mpi) != MP_OKAY)
return MP_INIT_E;
if (mp_read_unsigned_bin(mpi, (byte*)input + i, length) != 0) {
mp_clear(mpi);
return ASN_GETINT_E;
}
*inOutIdx = i + length;
return 0;
}
static int GetObjectId(const byte* input, word32* inOutIdx, word32* oid,
word32 maxIdx)
{
int length;
word32 i = *inOutIdx;
byte b;
*oid = 0;
b = input[i++];
if (b != ASN_OBJECT_ID)
return ASN_OBJECT_ID_E;
if (GetLength(input, &i, &length, maxIdx) < 0)
return ASN_PARSE_E;
while(length--)
*oid += input[i++];
/* just sum it up for now */
*inOutIdx = i;
return 0;
}
WOLFSSL_LOCAL int GetAlgoId(const byte* input, word32* inOutIdx, word32* oid,
word32 maxIdx)
{
int length;
word32 i = *inOutIdx;
byte b;
*oid = 0;
WOLFSSL_ENTER("GetAlgoId");
if (GetSequence(input, &i, &length, maxIdx) < 0)
return ASN_PARSE_E;
b = input[i++];
if (b != ASN_OBJECT_ID)
return ASN_OBJECT_ID_E;
if (GetLength(input, &i, &length, maxIdx) < 0)
return ASN_PARSE_E;
while(length--) {
/* odd HC08 compiler behavior here when input[i++] */
*oid += input[i];
i++;
}
/* just sum it up for now */
/* could have NULL tag and 0 terminator, but may not */
b = input[i++];
if (b == ASN_TAG_NULL) {
b = input[i++];
if (b != 0)
return ASN_EXPECT_0_E;
}
else
/* go back, didn't have it */
i--;
*inOutIdx = i;
return 0;
}
#ifndef NO_RSA
#ifdef HAVE_CAVIUM
static int GetCaviumInt(byte** buff, word16* buffSz, const byte* input,
word32* inOutIdx, word32 maxIdx, void* heap)
{
word32 i = *inOutIdx;
byte b = input[i++];
int length;
if (b != ASN_INTEGER)
return ASN_PARSE_E;
if (GetLength(input, &i, &length, maxIdx) < 0)
return ASN_PARSE_E;
if ( (b = input[i++]) == 0x00)
length--;
else
i--;
*buffSz = (word16)length;
*buff = XMALLOC(*buffSz, heap, DYNAMIC_TYPE_CAVIUM_RSA);
if (*buff == NULL)
return MEMORY_E;
XMEMCPY(*buff, input + i, *buffSz);
*inOutIdx = i + length;
return 0;
}
static int CaviumRsaPrivateKeyDecode(const byte* input, word32* inOutIdx,
RsaKey* key, word32 inSz)
{
int version, length;
void* h = key->heap;
if (GetSequence(input, inOutIdx, &length, inSz) < 0)
return ASN_PARSE_E;
if (GetMyVersion(input, inOutIdx, &version) < 0)
return ASN_PARSE_E;
key->type = RSA_PRIVATE;
if (GetCaviumInt(&key->c_n, &key->c_nSz, input, inOutIdx, inSz, h) < 0 ||
GetCaviumInt(&key->c_e, &key->c_eSz, input, inOutIdx, inSz, h) < 0 ||
GetCaviumInt(&key->c_d, &key->c_dSz, input, inOutIdx, inSz, h) < 0 ||
GetCaviumInt(&key->c_p, &key->c_pSz, input, inOutIdx, inSz, h) < 0 ||
GetCaviumInt(&key->c_q, &key->c_qSz, input, inOutIdx, inSz, h) < 0 ||
GetCaviumInt(&key->c_dP, &key->c_dP_Sz, input, inOutIdx, inSz, h) < 0 ||
GetCaviumInt(&key->c_dQ, &key->c_dQ_Sz, input, inOutIdx, inSz, h) < 0 ||
GetCaviumInt(&key->c_u, &key->c_uSz, input, inOutIdx, inSz, h) < 0 )
return ASN_RSA_KEY_E;
return 0;
}
#endif /* HAVE_CAVIUM */
int wc_RsaPrivateKeyDecode(const byte* input, word32* inOutIdx, RsaKey* key,
word32 inSz)
{
int version, length;
#ifdef HAVE_CAVIUM
if (key->magic == WOLFSSL_RSA_CAVIUM_MAGIC)
return CaviumRsaPrivateKeyDecode(input, inOutIdx, key, inSz);
#endif
if (GetSequence(input, inOutIdx, &length, inSz) < 0)
return ASN_PARSE_E;
if (GetMyVersion(input, inOutIdx, &version) < 0)
return ASN_PARSE_E;
key->type = RSA_PRIVATE;
if (GetInt(&key->n, input, inOutIdx, inSz) < 0 ||
GetInt(&key->e, input, inOutIdx, inSz) < 0 ||
GetInt(&key->d, input, inOutIdx, inSz) < 0 ||
GetInt(&key->p, input, inOutIdx, inSz) < 0 ||
GetInt(&key->q, input, inOutIdx, inSz) < 0 ||
GetInt(&key->dP, input, inOutIdx, inSz) < 0 ||
GetInt(&key->dQ, input, inOutIdx, inSz) < 0 ||
GetInt(&key->u, input, inOutIdx, inSz) < 0 ) return ASN_RSA_KEY_E;
return 0;
}
#endif /* NO_RSA */
/* Remove PKCS8 header, move beginning of traditional to beginning of input */
int ToTraditional(byte* input, word32 sz)
{
word32 inOutIdx = 0, oid;
int version, length;
if (GetSequence(input, &inOutIdx, &length, sz) < 0)
return ASN_PARSE_E;
if (GetMyVersion(input, &inOutIdx, &version) < 0)
return ASN_PARSE_E;
if (GetAlgoId(input, &inOutIdx, &oid, sz) < 0)
return ASN_PARSE_E;
if (input[inOutIdx] == ASN_OBJECT_ID) {
/* pkcs8 ecc uses slightly different format */
inOutIdx++; /* past id */
if (GetLength(input, &inOutIdx, &length, sz) < 0)
return ASN_PARSE_E;
inOutIdx += length; /* over sub id, key input will verify */
}
if (input[inOutIdx++] != ASN_OCTET_STRING)
return ASN_PARSE_E;
if (GetLength(input, &inOutIdx, &length, sz) < 0)
return ASN_PARSE_E;
XMEMMOVE(input, input + inOutIdx, length);
return length;
}
#ifndef NO_PWDBASED
/* Check To see if PKCS version algo is supported, set id if it is return 0
< 0 on error */
static int CheckAlgo(int first, int second, int* id, int* version)
{
*id = ALGO_ID_E;
*version = PKCS5; /* default */
if (first == 1) {
switch (second) {
case 1:
*id = PBE_SHA1_RC4_128;
*version = PKCS12;
return 0;
case 3:
*id = PBE_SHA1_DES3;
*version = PKCS12;
return 0;
default:
return ALGO_ID_E;
}
}
if (first != PKCS5)
return ASN_INPUT_E; /* VERSION ERROR */
if (second == PBES2) {
*version = PKCS5v2;
return 0;
}
switch (second) {
case 3: /* see RFC 2898 for ids */
*id = PBE_MD5_DES;
return 0;
case 10:
*id = PBE_SHA1_DES;
return 0;
default:
return ALGO_ID_E;
}
}
/* Check To see if PKCS v2 algo is supported, set id if it is return 0
< 0 on error */
static int CheckAlgoV2(int oid, int* id)
{
switch (oid) {
case 69:
*id = PBE_SHA1_DES;
return 0;
case 652:
*id = PBE_SHA1_DES3;
return 0;
default:
return ALGO_ID_E;
}
}
/* Decrypt intput in place from parameters based on id */
static int DecryptKey(const char* password, int passwordSz, byte* salt,
int saltSz, int iterations, int id, byte* input,
int length, int version, byte* cbcIv)
{
int typeH;
int derivedLen;
int decryptionType;
int ret = 0;
#ifdef WOLFSSL_SMALL_STACK
byte* key;
#else
byte key[MAX_KEY_SIZE];
#endif
switch (id) {
case PBE_MD5_DES:
typeH = MD5;
derivedLen = 16; /* may need iv for v1.5 */
decryptionType = DES_TYPE;
break;
case PBE_SHA1_DES:
typeH = SHA;
derivedLen = 16; /* may need iv for v1.5 */
decryptionType = DES_TYPE;
break;
case PBE_SHA1_DES3:
typeH = SHA;
derivedLen = 32; /* may need iv for v1.5 */
decryptionType = DES3_TYPE;
break;
case PBE_SHA1_RC4_128:
typeH = SHA;
derivedLen = 16;
decryptionType = RC4_TYPE;
break;
default:
return ALGO_ID_E;
}
#ifdef WOLFSSL_SMALL_STACK
key = (byte*)XMALLOC(MAX_KEY_SIZE, NULL, DYNAMIC_TYPE_TMP_BUFFER);
if (key == NULL)
return MEMORY_E;
#endif
if (version == PKCS5v2)
ret = wc_PBKDF2(key, (byte*)password, passwordSz, salt, saltSz, iterations,
derivedLen, typeH);
#ifndef NO_SHA
else if (version == PKCS5)
ret = wc_PBKDF1(key, (byte*)password, passwordSz, salt, saltSz, iterations,
derivedLen, typeH);
#endif
else if (version == PKCS12) {
int i, idx = 0;
byte unicodePasswd[MAX_UNICODE_SZ];
if ( (passwordSz * 2 + 2) > (int)sizeof(unicodePasswd)) {
#ifdef WOLFSSL_SMALL_STACK
XFREE(key, NULL, DYNAMIC_TYPE_TMP_BUFFER);
#endif
return UNICODE_SIZE_E;
}
for (i = 0; i < passwordSz; i++) {
unicodePasswd[idx++] = 0x00;
unicodePasswd[idx++] = (byte)password[i];
}
/* add trailing NULL */
unicodePasswd[idx++] = 0x00;
unicodePasswd[idx++] = 0x00;
ret = wc_PKCS12_PBKDF(key, unicodePasswd, idx, salt, saltSz,
iterations, derivedLen, typeH, 1);
if (decryptionType != RC4_TYPE)
ret += wc_PKCS12_PBKDF(cbcIv, unicodePasswd, idx, salt, saltSz,
iterations, 8, typeH, 2);
}
else {
#ifdef WOLFSSL_SMALL_STACK
XFREE(key, NULL, DYNAMIC_TYPE_TMP_BUFFER);
#endif
return ALGO_ID_E;
}
if (ret != 0) {
#ifdef WOLFSSL_SMALL_STACK
XFREE(key, NULL, DYNAMIC_TYPE_TMP_BUFFER);
#endif
return ret;
}
switch (decryptionType) {
#ifndef NO_DES3
case DES_TYPE:
{
Des dec;
byte* desIv = key + 8;
if (version == PKCS5v2 || version == PKCS12)
desIv = cbcIv;
ret = wc_Des_SetKey(&dec, key, desIv, DES_DECRYPTION);
if (ret != 0) {
#ifdef WOLFSSL_SMALL_STACK
XFREE(key, NULL, DYNAMIC_TYPE_TMP_BUFFER);
#endif
return ret;
}
wc_Des_CbcDecrypt(&dec, input, input, length);
break;
}
case DES3_TYPE:
{
Des3 dec;
byte* desIv = key + 24;
if (version == PKCS5v2 || version == PKCS12)
desIv = cbcIv;
ret = wc_Des3_SetKey(&dec, key, desIv, DES_DECRYPTION);
if (ret != 0) {
#ifdef WOLFSSL_SMALL_STACK
XFREE(key, NULL, DYNAMIC_TYPE_TMP_BUFFER);
#endif
return ret;
}
ret = wc_Des3_CbcDecrypt(&dec, input, input, length);
if (ret != 0) {
#ifdef WOLFSSL_SMALL_STACK
XFREE(key, NULL, DYNAMIC_TYPE_TMP_BUFFER);
#endif
return ret;
}
break;
}
#endif
#ifndef NO_RC4
case RC4_TYPE:
{
Arc4 dec;
wc_Arc4SetKey(&dec, key, derivedLen);
wc_Arc4Process(&dec, input, input, length);
break;
}
#endif
default:
#ifdef WOLFSSL_SMALL_STACK
XFREE(key, NULL, DYNAMIC_TYPE_TMP_BUFFER);
#endif
return ALGO_ID_E;
}
#ifdef WOLFSSL_SMALL_STACK
XFREE(key, NULL, DYNAMIC_TYPE_TMP_BUFFER);
#endif
return 0;
}
/* Remove Encrypted PKCS8 header, move beginning of traditional to beginning
of input */
int ToTraditionalEnc(byte* input, word32 sz,const char* password,int passwordSz)
{
word32 inOutIdx = 0, oid;
int first, second, length, version, saltSz, id;
int iterations = 0;
#ifdef WOLFSSL_SMALL_STACK
byte* salt = NULL;
byte* cbcIv = NULL;
#else
byte salt[MAX_SALT_SIZE];
byte cbcIv[MAX_IV_SIZE];
#endif
if (GetSequence(input, &inOutIdx, &length, sz) < 0)
return ASN_PARSE_E;
if (GetAlgoId(input, &inOutIdx, &oid, sz) < 0)
return ASN_PARSE_E;
first = input[inOutIdx - 2]; /* PKCS version alwyas 2nd to last byte */
second = input[inOutIdx - 1]; /* version.algo, algo id last byte */
if (CheckAlgo(first, second, &id, &version) < 0)
return ASN_INPUT_E; /* Algo ID error */
if (version == PKCS5v2) {
if (GetSequence(input, &inOutIdx, &length, sz) < 0)
return ASN_PARSE_E;
if (GetAlgoId(input, &inOutIdx, &oid, sz) < 0)
return ASN_PARSE_E;
if (oid != PBKDF2_OID)
return ASN_PARSE_E;
}
if (GetSequence(input, &inOutIdx, &length, sz) < 0)
return ASN_PARSE_E;
if (input[inOutIdx++] != ASN_OCTET_STRING)
return ASN_PARSE_E;
if (GetLength(input, &inOutIdx, &saltSz, sz) < 0)
return ASN_PARSE_E;
if (saltSz > MAX_SALT_SIZE)
return ASN_PARSE_E;
#ifdef WOLFSSL_SMALL_STACK
salt = (byte*)XMALLOC(MAX_SALT_SIZE, NULL, DYNAMIC_TYPE_TMP_BUFFER);
if (salt == NULL)
return MEMORY_E;
#endif
XMEMCPY(salt, &input[inOutIdx], saltSz);
inOutIdx += saltSz;
if (GetShortInt(input, &inOutIdx, &iterations) < 0) {
#ifdef WOLFSSL_SMALL_STACK
XFREE(salt, NULL, DYNAMIC_TYPE_TMP_BUFFER);
#endif
return ASN_PARSE_E;
}
#ifdef WOLFSSL_SMALL_STACK
cbcIv = (byte*)XMALLOC(MAX_IV_SIZE, NULL, DYNAMIC_TYPE_TMP_BUFFER);
if (cbcIv == NULL) {
XFREE(salt, NULL, DYNAMIC_TYPE_TMP_BUFFER);
return MEMORY_E;
}
#endif
if (version == PKCS5v2) {
/* get encryption algo */
if (GetAlgoId(input, &inOutIdx, &oid, sz) < 0) {
#ifdef WOLFSSL_SMALL_STACK
XFREE(salt, NULL, DYNAMIC_TYPE_TMP_BUFFER);
XFREE(cbcIv, NULL, DYNAMIC_TYPE_TMP_BUFFER);
#endif
return ASN_PARSE_E;
}
if (CheckAlgoV2(oid, &id) < 0) {
#ifdef WOLFSSL_SMALL_STACK
XFREE(salt, NULL, DYNAMIC_TYPE_TMP_BUFFER);
XFREE(cbcIv, NULL, DYNAMIC_TYPE_TMP_BUFFER);
#endif
return ASN_PARSE_E; /* PKCS v2 algo id error */
}
if (input[inOutIdx++] != ASN_OCTET_STRING) {
#ifdef WOLFSSL_SMALL_STACK
XFREE(salt, NULL, DYNAMIC_TYPE_TMP_BUFFER);
XFREE(cbcIv, NULL, DYNAMIC_TYPE_TMP_BUFFER);
#endif
return ASN_PARSE_E;
}
if (GetLength(input, &inOutIdx, &length, sz) < 0) {
#ifdef WOLFSSL_SMALL_STACK
XFREE(salt, NULL, DYNAMIC_TYPE_TMP_BUFFER);
XFREE(cbcIv, NULL, DYNAMIC_TYPE_TMP_BUFFER);
#endif
return ASN_PARSE_E;
}
XMEMCPY(cbcIv, &input[inOutIdx], length);
inOutIdx += length;
}
if (input[inOutIdx++] != ASN_OCTET_STRING) {
#ifdef WOLFSSL_SMALL_STACK
XFREE(salt, NULL, DYNAMIC_TYPE_TMP_BUFFER);
XFREE(cbcIv, NULL, DYNAMIC_TYPE_TMP_BUFFER);
#endif
return ASN_PARSE_E;
}
if (GetLength(input, &inOutIdx, &length, sz) < 0) {
#ifdef WOLFSSL_SMALL_STACK
XFREE(salt, NULL, DYNAMIC_TYPE_TMP_BUFFER);
XFREE(cbcIv, NULL, DYNAMIC_TYPE_TMP_BUFFER);
#endif
return ASN_PARSE_E;
}
if (DecryptKey(password, passwordSz, salt, saltSz, iterations, id,
input + inOutIdx, length, version, cbcIv) < 0) {
#ifdef WOLFSSL_SMALL_STACK
XFREE(salt, NULL, DYNAMIC_TYPE_TMP_BUFFER);
XFREE(cbcIv, NULL, DYNAMIC_TYPE_TMP_BUFFER);
#endif
return ASN_INPUT_E; /* decrypt failure */
}
#ifdef WOLFSSL_SMALL_STACK
XFREE(salt, NULL, DYNAMIC_TYPE_TMP_BUFFER);
XFREE(cbcIv, NULL, DYNAMIC_TYPE_TMP_BUFFER);
#endif
XMEMMOVE(input, input + inOutIdx, length);
return ToTraditional(input, length);
}
#endif /* NO_PWDBASED */
#ifndef NO_RSA
int wc_RsaPublicKeyDecode(const byte* input, word32* inOutIdx, RsaKey* key,
word32 inSz)
{
int length;
if (GetSequence(input, inOutIdx, &length, inSz) < 0)
return ASN_PARSE_E;
key->type = RSA_PUBLIC;
#if defined(OPENSSL_EXTRA) || defined(RSA_DECODE_EXTRA)
{
byte b = input[*inOutIdx];
if (b != ASN_INTEGER) {
/* not from decoded cert, will have algo id, skip past */
if (GetSequence(input, inOutIdx, &length, inSz) < 0)
return ASN_PARSE_E;
b = input[(*inOutIdx)++];
if (b != ASN_OBJECT_ID)
return ASN_OBJECT_ID_E;
if (GetLength(input, inOutIdx, &length, inSz) < 0)
return ASN_PARSE_E;
*inOutIdx += length; /* skip past */
/* could have NULL tag and 0 terminator, but may not */
b = input[(*inOutIdx)++];
if (b == ASN_TAG_NULL) {
b = input[(*inOutIdx)++];
if (b != 0)
return ASN_EXPECT_0_E;
}
else
/* go back, didn't have it */
(*inOutIdx)--;
/* should have bit tag length and seq next */
b = input[(*inOutIdx)++];
if (b != ASN_BIT_STRING)
return ASN_BITSTR_E;
if (GetLength(input, inOutIdx, &length, inSz) < 0)
return ASN_PARSE_E;
/* could have 0 */
b = input[(*inOutIdx)++];
if (b != 0)
(*inOutIdx)--;
if (GetSequence(input, inOutIdx, &length, inSz) < 0)
return ASN_PARSE_E;
} /* end if */
} /* openssl var block */
#endif /* OPENSSL_EXTRA */
if (GetInt(&key->n, input, inOutIdx, inSz) < 0 ||
GetInt(&key->e, input, inOutIdx, inSz) < 0 ) return ASN_RSA_KEY_E;
return 0;
}
/* import RSA public key elements (n, e) into RsaKey structure (key) */
int wc_RsaPublicKeyDecodeRaw(const byte* n, word32 nSz, const byte* e,
word32 eSz, RsaKey* key)
{
if (n == NULL || e == NULL || key == NULL)
return BAD_FUNC_ARG;
key->type = RSA_PUBLIC;
if (mp_init(&key->n) != MP_OKAY)
return MP_INIT_E;
if (mp_read_unsigned_bin(&key->n, n, nSz) != 0) {
mp_clear(&key->n);
return ASN_GETINT_E;
}
if (mp_init(&key->e) != MP_OKAY) {
mp_clear(&key->n);
return MP_INIT_E;
}
if (mp_read_unsigned_bin(&key->e, e, eSz) != 0) {
mp_clear(&key->n);
mp_clear(&key->e);
return ASN_GETINT_E;
}
return 0;
}
#endif
#ifndef NO_DH
int wc_DhKeyDecode(const byte* input, word32* inOutIdx, DhKey* key, word32 inSz)
{
int length;
if (GetSequence(input, inOutIdx, &length, inSz) < 0)
return ASN_PARSE_E;
if (GetInt(&key->p, input, inOutIdx, inSz) < 0 ||
GetInt(&key->g, input, inOutIdx, inSz) < 0 ) return ASN_DH_KEY_E;
return 0;
}
int wc_DhParamsLoad(const byte* input, word32 inSz, byte* p, word32* pInOutSz,
byte* g, word32* gInOutSz)
{
word32 i = 0;
byte b;
int length;
if (GetSequence(input, &i, &length, inSz) < 0)
return ASN_PARSE_E;
b = input[i++];
if (b != ASN_INTEGER)
return ASN_PARSE_E;
if (GetLength(input, &i, &length, inSz) < 0)
return ASN_PARSE_E;
if ( (b = input[i++]) == 0x00)
length--;
else
i--;
if (length <= (int)*pInOutSz) {
XMEMCPY(p, &input[i], length);
*pInOutSz = length;
}
else
return BUFFER_E;
i += length;
b = input[i++];
if (b != ASN_INTEGER)
return ASN_PARSE_E;
if (GetLength(input, &i, &length, inSz) < 0)
return ASN_PARSE_E;
if (length <= (int)*gInOutSz) {
XMEMCPY(g, &input[i], length);
*gInOutSz = length;
}
else
return BUFFER_E;
return 0;
}
#endif /* NO_DH */
#ifndef NO_DSA
int DsaPublicKeyDecode(const byte* input, word32* inOutIdx, DsaKey* key,
word32 inSz)
{
int length;
if (GetSequence(input, inOutIdx, &length, inSz) < 0)
return ASN_PARSE_E;
if (GetInt(&key->p, input, inOutIdx, inSz) < 0 ||
GetInt(&key->q, input, inOutIdx, inSz) < 0 ||
GetInt(&key->g, input, inOutIdx, inSz) < 0 ||
GetInt(&key->y, input, inOutIdx, inSz) < 0 ) return ASN_DH_KEY_E;
key->type = DSA_PUBLIC;
return 0;
}
int DsaPrivateKeyDecode(const byte* input, word32* inOutIdx, DsaKey* key,
word32 inSz)
{
int length, version;
if (GetSequence(input, inOutIdx, &length, inSz) < 0)
return ASN_PARSE_E;
if (GetMyVersion(input, inOutIdx, &version) < 0)
return ASN_PARSE_E;
if (GetInt(&key->p, input, inOutIdx, inSz) < 0 ||
GetInt(&key->q, input, inOutIdx, inSz) < 0 ||
GetInt(&key->g, input, inOutIdx, inSz) < 0 ||
GetInt(&key->y, input, inOutIdx, inSz) < 0 ||
GetInt(&key->x, input, inOutIdx, inSz) < 0 ) return ASN_DH_KEY_E;
key->type = DSA_PRIVATE;
return 0;
}
#endif /* NO_DSA */
void InitDecodedCert(DecodedCert* cert, byte* source, word32 inSz, void* heap)
{
cert->publicKey = 0;
cert->pubKeySize = 0;
cert->pubKeyStored = 0;
cert->version = 0;
cert->signature = 0;
cert->subjectCN = 0;
cert->subjectCNLen = 0;
cert->subjectCNEnc = CTC_UTF8;
cert->subjectCNStored = 0;
cert->weOwnAltNames = 0;
cert->altNames = NULL;
#ifndef IGNORE_NAME_CONSTRAINTS
cert->altEmailNames = NULL;
cert->permittedNames = NULL;
cert->excludedNames = NULL;
#endif /* IGNORE_NAME_CONSTRAINTS */
cert->issuer[0] = '\0';
cert->subject[0] = '\0';
cert->source = source; /* don't own */
cert->srcIdx = 0;
cert->maxIdx = inSz; /* can't go over this index */
cert->heap = heap;
XMEMSET(cert->serial, 0, EXTERNAL_SERIAL_SIZE);
cert->serialSz = 0;
cert->extensions = 0;
cert->extensionsSz = 0;
cert->extensionsIdx = 0;
cert->extAuthInfo = NULL;
cert->extAuthInfoSz = 0;
cert->extCrlInfo = NULL;
cert->extCrlInfoSz = 0;
XMEMSET(cert->extSubjKeyId, 0, KEYID_SIZE);
cert->extSubjKeyIdSet = 0;
XMEMSET(cert->extAuthKeyId, 0, KEYID_SIZE);
cert->extAuthKeyIdSet = 0;
cert->extKeyUsageSet = 0;
cert->extKeyUsage = 0;
cert->extExtKeyUsageSet = 0;
cert->extExtKeyUsage = 0;
cert->isCA = 0;
#ifdef HAVE_PKCS7
cert->issuerRaw = NULL;
cert->issuerRawLen = 0;
#endif
#ifdef WOLFSSL_CERT_GEN
cert->subjectSN = 0;
cert->subjectSNLen = 0;
cert->subjectSNEnc = CTC_UTF8;
cert->subjectC = 0;
cert->subjectCLen = 0;
cert->subjectCEnc = CTC_PRINTABLE;
cert->subjectL = 0;
cert->subjectLLen = 0;
cert->subjectLEnc = CTC_UTF8;
cert->subjectST = 0;
cert->subjectSTLen = 0;
cert->subjectSTEnc = CTC_UTF8;
cert->subjectO = 0;
cert->subjectOLen = 0;
cert->subjectOEnc = CTC_UTF8;
cert->subjectOU = 0;
cert->subjectOULen = 0;
cert->subjectOUEnc = CTC_UTF8;
cert->subjectEmail = 0;
cert->subjectEmailLen = 0;
#endif /* WOLFSSL_CERT_GEN */
cert->beforeDate = NULL;
cert->beforeDateLen = 0;
cert->afterDate = NULL;
cert->afterDateLen = 0;
#ifdef OPENSSL_EXTRA
XMEMSET(&cert->issuerName, 0, sizeof(DecodedName));
XMEMSET(&cert->subjectName, 0, sizeof(DecodedName));
cert->extBasicConstSet = 0;
cert->extBasicConstCrit = 0;
cert->extBasicConstPlSet = 0;
cert->pathLength = 0;
cert->extSubjAltNameSet = 0;
cert->extSubjAltNameCrit = 0;
cert->extAuthKeyIdCrit = 0;
cert->extSubjKeyIdCrit = 0;
cert->extKeyUsageCrit = 0;
cert->extExtKeyUsageCrit = 0;
cert->extExtKeyUsageSrc = NULL;
cert->extExtKeyUsageSz = 0;
cert->extExtKeyUsageCount = 0;
cert->extAuthKeyIdSrc = NULL;
cert->extAuthKeyIdSz = 0;
cert->extSubjKeyIdSrc = NULL;
cert->extSubjKeyIdSz = 0;
#endif /* OPENSSL_EXTRA */
#if defined(OPENSSL_EXTRA) || !defined(IGNORE_NAME_CONSTRAINTS)
cert->extNameConstraintSet = 0;
#endif /* OPENSSL_EXTRA || !IGNORE_NAME_CONSTRAINTS */
#ifdef HAVE_ECC
cert->pkCurveOID = 0;
#endif /* HAVE_ECC */
#ifdef WOLFSSL_SEP
cert->deviceTypeSz = 0;
cert->deviceType = NULL;
cert->hwTypeSz = 0;
cert->hwType = NULL;
cert->hwSerialNumSz = 0;
cert->hwSerialNum = NULL;
#ifdef OPENSSL_EXTRA
cert->extCertPolicySet = 0;
cert->extCertPolicyCrit = 0;
#endif /* OPENSSL_EXTRA */
#endif /* WOLFSSL_SEP */
}
void FreeAltNames(DNS_entry* altNames, void* heap)
{
(void)heap;
while (altNames) {
DNS_entry* tmp = altNames->next;
XFREE(altNames->name, heap, DYNAMIC_TYPE_ALTNAME);
XFREE(altNames, heap, DYNAMIC_TYPE_ALTNAME);
altNames = tmp;
}
}
#ifndef IGNORE_NAME_CONSTRAINTS
void FreeNameSubtrees(Base_entry* names, void* heap)
{
(void)heap;
while (names) {
Base_entry* tmp = names->next;
XFREE(names->name, heap, DYNAMIC_TYPE_ALTNAME);
XFREE(names, heap, DYNAMIC_TYPE_ALTNAME);
names = tmp;
}
}
#endif /* IGNORE_NAME_CONSTRAINTS */
void FreeDecodedCert(DecodedCert* cert)
{
if (cert->subjectCNStored == 1)
XFREE(cert->subjectCN, cert->heap, DYNAMIC_TYPE_SUBJECT_CN);
if (cert->pubKeyStored == 1)
XFREE(cert->publicKey, cert->heap, DYNAMIC_TYPE_PUBLIC_KEY);
if (cert->weOwnAltNames && cert->altNames)
FreeAltNames(cert->altNames, cert->heap);
#ifndef IGNORE_NAME_CONSTRAINTS
if (cert->altEmailNames)
FreeAltNames(cert->altEmailNames, cert->heap);
if (cert->permittedNames)
FreeNameSubtrees(cert->permittedNames, cert->heap);
if (cert->excludedNames)
FreeNameSubtrees(cert->excludedNames, cert->heap);
#endif /* IGNORE_NAME_CONSTRAINTS */
#ifdef WOLFSSL_SEP
XFREE(cert->deviceType, cert->heap, 0);
XFREE(cert->hwType, cert->heap, 0);
XFREE(cert->hwSerialNum, cert->heap, 0);
#endif /* WOLFSSL_SEP */
#ifdef OPENSSL_EXTRA
if (cert->issuerName.fullName != NULL)
XFREE(cert->issuerName.fullName, NULL, DYNAMIC_TYPE_X509);
if (cert->subjectName.fullName != NULL)
XFREE(cert->subjectName.fullName, NULL, DYNAMIC_TYPE_X509);
#endif /* OPENSSL_EXTRA */
}
static int GetCertHeader(DecodedCert* cert)
{
int ret = 0, len;
byte serialTmp[EXTERNAL_SERIAL_SIZE];
#if defined(WOLFSSL_SMALL_STACK) && defined(USE_FAST_MATH)
mp_int* mpi = NULL;
#else
mp_int stack_mpi;
mp_int* mpi = &stack_mpi;
#endif
if (GetSequence(cert->source, &cert->srcIdx, &len, cert->maxIdx) < 0)
return ASN_PARSE_E;
cert->certBegin = cert->srcIdx;
if (GetSequence(cert->source, &cert->srcIdx, &len, cert->maxIdx) < 0)
return ASN_PARSE_E;
cert->sigIndex = len + cert->srcIdx;
if (GetExplicitVersion(cert->source, &cert->srcIdx, &cert->version) < 0)
return ASN_PARSE_E;
#if defined(WOLFSSL_SMALL_STACK) && defined(USE_FAST_MATH)
mpi = (mp_int*)XMALLOC(sizeof(mp_int), NULL, DYNAMIC_TYPE_TMP_BUFFER);
if (mpi == NULL)
return MEMORY_E;
#endif
if (GetInt(mpi, cert->source, &cert->srcIdx, cert->maxIdx) < 0) {
#if defined(WOLFSSL_SMALL_STACK) && defined(USE_FAST_MATH)
XFREE(mpi, NULL, DYNAMIC_TYPE_TMP_BUFFER);
#endif
return ASN_PARSE_E;
}
len = mp_unsigned_bin_size(mpi);
if (len < (int)sizeof(serialTmp)) {
if ( (ret = mp_to_unsigned_bin(mpi, serialTmp)) == MP_OKAY) {
XMEMCPY(cert->serial, serialTmp, len);
cert->serialSz = len;
}
}
mp_clear(mpi);
#if defined(WOLFSSL_SMALL_STACK) && defined(USE_FAST_MATH)
XFREE(mpi, NULL, DYNAMIC_TYPE_TMP_BUFFER);
#endif
return ret;
}
#if !defined(NO_RSA)
/* Store Rsa Key, may save later, Dsa could use in future */
static int StoreRsaKey(DecodedCert* cert)
{
int length;
word32 recvd = cert->srcIdx;
if (GetSequence(cert->source, &cert->srcIdx, &length, cert->maxIdx) < 0)
return ASN_PARSE_E;
recvd = cert->srcIdx - recvd;
length += recvd;
while (recvd--)
cert->srcIdx--;
cert->pubKeySize = length;
cert->publicKey = cert->source + cert->srcIdx;
cert->srcIdx += length;
return 0;
}
#endif
#ifdef HAVE_ECC
/* return 0 on sucess if the ECC curve oid sum is supported */
static int CheckCurve(word32 oid)
{
int ret = 0;
switch (oid) {
#if defined(HAVE_ALL_CURVES) || defined(HAVE_ECC160)
case ECC_160R1:
#endif
#if defined(HAVE_ALL_CURVES) || defined(HAVE_ECC192)
case ECC_192R1:
#endif
#if defined(HAVE_ALL_CURVES) || defined(HAVE_ECC224)
case ECC_224R1:
#endif
#if defined(HAVE_ALL_CURVES) || !defined(NO_ECC256)
case ECC_256R1:
#endif
#if defined(HAVE_ALL_CURVES) || defined(HAVE_ECC384)
case ECC_384R1:
#endif
#if defined(HAVE_ALL_CURVES) || defined(HAVE_ECC521)
case ECC_521R1:
#endif
break;
default:
ret = ALGO_ID_E;
}
return ret;
}
#endif /* HAVE_ECC */
static int GetKey(DecodedCert* cert)
{
int length;
#ifdef HAVE_NTRU
int tmpIdx = cert->srcIdx;
#endif
if (GetSequence(cert->source, &cert->srcIdx, &length, cert->maxIdx) < 0)
return ASN_PARSE_E;
if (GetAlgoId(cert->source, &cert->srcIdx, &cert->keyOID, cert->maxIdx) < 0)
return ASN_PARSE_E;
switch (cert->keyOID) {
#ifndef NO_RSA
case RSAk:
{
byte b = cert->source[cert->srcIdx++];
if (b != ASN_BIT_STRING)
return ASN_BITSTR_E;
if (GetLength(cert->source,&cert->srcIdx,&length,cert->maxIdx) < 0)
return ASN_PARSE_E;
b = cert->source[cert->srcIdx++];
if (b != 0x00)
return ASN_EXPECT_0_E;
return StoreRsaKey(cert);
}
#endif /* NO_RSA */
#ifdef HAVE_NTRU
case NTRUk:
{
const byte* key = &cert->source[tmpIdx];
byte* next = (byte*)key;
word16 keyLen;
word32 rc;
word32 remaining = cert->maxIdx - cert->srcIdx;
#ifdef WOLFSSL_SMALL_STACK
byte* keyBlob = NULL;
#else
byte keyBlob[MAX_NTRU_KEY_SZ];
#endif
rc = ntru_crypto_ntru_encrypt_subjectPublicKeyInfo2PublicKey(key,
&keyLen, NULL, &next, &remaining);
if (rc != NTRU_OK)
return ASN_NTRU_KEY_E;
if (keyLen > MAX_NTRU_KEY_SZ)
return ASN_NTRU_KEY_E;
#ifdef WOLFSSL_SMALL_STACK
keyBlob = (byte*)XMALLOC(MAX_NTRU_KEY_SZ, NULL,
DYNAMIC_TYPE_TMP_BUFFER);
if (keyBlob == NULL)
return MEMORY_E;
#endif
rc = ntru_crypto_ntru_encrypt_subjectPublicKeyInfo2PublicKey(key,
&keyLen, keyBlob, &next, &remaining);
if (rc != NTRU_OK) {
#ifdef WOLFSSL_SMALL_STACK
XFREE(keyBlob, NULL, DYNAMIC_TYPE_TMP_BUFFER);
#endif
return ASN_NTRU_KEY_E;
}
if ( (next - key) < 0) {
#ifdef WOLFSSL_SMALL_STACK
XFREE(keyBlob, NULL, DYNAMIC_TYPE_TMP_BUFFER);
#endif
return ASN_NTRU_KEY_E;
}
cert->srcIdx = tmpIdx + (int)(next - key);
cert->publicKey = (byte*) XMALLOC(keyLen, cert->heap,
DYNAMIC_TYPE_PUBLIC_KEY);
if (cert->publicKey == NULL) {
#ifdef WOLFSSL_SMALL_STACK
XFREE(keyBlob, NULL, DYNAMIC_TYPE_TMP_BUFFER);
#endif
return MEMORY_E;
}
XMEMCPY(cert->publicKey, keyBlob, keyLen);
cert->pubKeyStored = 1;
cert->pubKeySize = keyLen;
#ifdef WOLFSSL_SMALL_STACK
XFREE(keyBlob, NULL, DYNAMIC_TYPE_TMP_BUFFER);
#endif
return 0;
}
#endif /* HAVE_NTRU */
#ifdef HAVE_ECC
case ECDSAk:
{
int oidSz = 0;
byte b = cert->source[cert->srcIdx++];
if (b != ASN_OBJECT_ID)
return ASN_OBJECT_ID_E;
if (GetLength(cert->source,&cert->srcIdx,&oidSz,cert->maxIdx) < 0)
return ASN_PARSE_E;
while(oidSz--)
cert->pkCurveOID += cert->source[cert->srcIdx++];
if (CheckCurve(cert->pkCurveOID) < 0)
return ECC_CURVE_OID_E;
/* key header */
b = cert->source[cert->srcIdx++];
if (b != ASN_BIT_STRING)
return ASN_BITSTR_E;
if (GetLength(cert->source,&cert->srcIdx,&length,cert->maxIdx) < 0)
return ASN_PARSE_E;
b = cert->source[cert->srcIdx++];
if (b != 0x00)
return ASN_EXPECT_0_E;
/* actual key, use length - 1 since ate preceding 0 */
length -= 1;
cert->publicKey = (byte*) XMALLOC(length, cert->heap,
DYNAMIC_TYPE_PUBLIC_KEY);
if (cert->publicKey == NULL)
return MEMORY_E;
XMEMCPY(cert->publicKey, &cert->source[cert->srcIdx], length);
cert->pubKeyStored = 1;
cert->pubKeySize = length;
cert->srcIdx += length;
return 0;
}
#endif /* HAVE_ECC */
default:
return ASN_UNKNOWN_OID_E;
}
}
/* process NAME, either issuer or subject */
static int GetName(DecodedCert* cert, int nameType)
{
int length; /* length of all distinguished names */
int dummy;
int ret;
char* full;
byte* hash;
word32 idx;
#ifdef OPENSSL_EXTRA
DecodedName* dName =
(nameType == ISSUER) ? &cert->issuerName : &cert->subjectName;
#endif /* OPENSSL_EXTRA */
WOLFSSL_MSG("Getting Cert Name");
if (nameType == ISSUER) {
full = cert->issuer;
hash = cert->issuerHash;
}
else {
full = cert->subject;
hash = cert->subjectHash;
}
if (cert->source[cert->srcIdx] == ASN_OBJECT_ID) {
WOLFSSL_MSG("Trying optional prefix...");
if (GetLength(cert->source, &cert->srcIdx, &length, cert->maxIdx) < 0)
return ASN_PARSE_E;
cert->srcIdx += length;
WOLFSSL_MSG("Got optional prefix");
}
/* For OCSP, RFC2560 section 4.1.1 states the issuer hash should be
* calculated over the entire DER encoding of the Name field, including
* the tag and length. */
idx = cert->srcIdx;
if (GetSequence(cert->source, &cert->srcIdx, &length, cert->maxIdx) < 0)
return ASN_PARSE_E;
#ifdef NO_SHA
ret = wc_Sha256Hash(&cert->source[idx], length + cert->srcIdx - idx, hash);
#else
ret = wc_ShaHash(&cert->source[idx], length + cert->srcIdx - idx, hash);
#endif
if (ret != 0)
return ret;
length += cert->srcIdx;
idx = 0;
#ifdef HAVE_PKCS7
/* store pointer to raw issuer */
if (nameType == ISSUER) {
cert->issuerRaw = &cert->source[cert->srcIdx];
cert->issuerRawLen = length - cert->srcIdx;
}
#endif
#ifndef IGNORE_NAME_CONSTRAINTS
if (nameType == SUBJECT) {
cert->subjectRaw = &cert->source[cert->srcIdx];
cert->subjectRawLen = length - cert->srcIdx;
}
#endif
while (cert->srcIdx < (word32)length) {
byte b;
byte joint[2];
byte tooBig = FALSE;
int oidSz;
if (GetSet(cert->source, &cert->srcIdx, &dummy, cert->maxIdx) < 0) {
WOLFSSL_MSG("Cert name lacks set header, trying sequence");
}
if (GetSequence(cert->source, &cert->srcIdx, &dummy, cert->maxIdx) < 0)
return ASN_PARSE_E;
b = cert->source[cert->srcIdx++];
if (b != ASN_OBJECT_ID)
return ASN_OBJECT_ID_E;
if (GetLength(cert->source, &cert->srcIdx, &oidSz, cert->maxIdx) < 0)
return ASN_PARSE_E;
XMEMCPY(joint, &cert->source[cert->srcIdx], sizeof(joint));
/* v1 name types */
if (joint[0] == 0x55 && joint[1] == 0x04) {
byte id;
byte copy = FALSE;
int strLen;
cert->srcIdx += 2;
id = cert->source[cert->srcIdx++];
b = cert->source[cert->srcIdx++]; /* encoding */
if (GetLength(cert->source, &cert->srcIdx, &strLen,
cert->maxIdx) < 0)
return ASN_PARSE_E;
if ( (strLen + 14) > (int)(ASN_NAME_MAX - idx)) {
/* include biggest pre fix header too 4 = "/serialNumber=" */
WOLFSSL_MSG("ASN Name too big, skipping");
tooBig = TRUE;
}
if (id == ASN_COMMON_NAME) {
if (nameType == SUBJECT) {
cert->subjectCN = (char *)&cert->source[cert->srcIdx];
cert->subjectCNLen = strLen;
cert->subjectCNEnc = b;
}
if (!tooBig) {
XMEMCPY(&full[idx], "/CN=", 4);
idx += 4;
copy = TRUE;
}
#ifdef OPENSSL_EXTRA
dName->cnIdx = cert->srcIdx;
dName->cnLen = strLen;
#endif /* OPENSSL_EXTRA */
}
else if (id == ASN_SUR_NAME) {
if (!tooBig) {
XMEMCPY(&full[idx], "/SN=", 4);
idx += 4;
copy = TRUE;
}
#ifdef WOLFSSL_CERT_GEN
if (nameType == SUBJECT) {
cert->subjectSN = (char*)&cert->source[cert->srcIdx];
cert->subjectSNLen = strLen;
cert->subjectSNEnc = b;
}
#endif /* WOLFSSL_CERT_GEN */
#ifdef OPENSSL_EXTRA
dName->snIdx = cert->srcIdx;
dName->snLen = strLen;
#endif /* OPENSSL_EXTRA */
}
else if (id == ASN_COUNTRY_NAME) {
if (!tooBig) {
XMEMCPY(&full[idx], "/C=", 3);
idx += 3;
copy = TRUE;
}
#ifdef WOLFSSL_CERT_GEN
if (nameType == SUBJECT) {
cert->subjectC = (char*)&cert->source[cert->srcIdx];
cert->subjectCLen = strLen;
cert->subjectCEnc = b;
}
#endif /* WOLFSSL_CERT_GEN */
#ifdef OPENSSL_EXTRA
dName->cIdx = cert->srcIdx;
dName->cLen = strLen;
#endif /* OPENSSL_EXTRA */
}
else if (id == ASN_LOCALITY_NAME) {
if (!tooBig) {
XMEMCPY(&full[idx], "/L=", 3);
idx += 3;
copy = TRUE;
}
#ifdef WOLFSSL_CERT_GEN
if (nameType == SUBJECT) {
cert->subjectL = (char*)&cert->source[cert->srcIdx];
cert->subjectLLen = strLen;
cert->subjectLEnc = b;
}
#endif /* WOLFSSL_CERT_GEN */
#ifdef OPENSSL_EXTRA
dName->lIdx = cert->srcIdx;
dName->lLen = strLen;
#endif /* OPENSSL_EXTRA */
}
else if (id == ASN_STATE_NAME) {
if (!tooBig) {
XMEMCPY(&full[idx], "/ST=", 4);
idx += 4;
copy = TRUE;
}
#ifdef WOLFSSL_CERT_GEN
if (nameType == SUBJECT) {
cert->subjectST = (char*)&cert->source[cert->srcIdx];
cert->subjectSTLen = strLen;
cert->subjectSTEnc = b;
}
#endif /* WOLFSSL_CERT_GEN */
#ifdef OPENSSL_EXTRA
dName->stIdx = cert->srcIdx;
dName->stLen = strLen;
#endif /* OPENSSL_EXTRA */
}
else if (id == ASN_ORG_NAME) {
if (!tooBig) {
XMEMCPY(&full[idx], "/O=", 3);
idx += 3;
copy = TRUE;
}
#ifdef WOLFSSL_CERT_GEN
if (nameType == SUBJECT) {
cert->subjectO = (char*)&cert->source[cert->srcIdx];
cert->subjectOLen = strLen;
cert->subjectOEnc = b;
}
#endif /* WOLFSSL_CERT_GEN */
#ifdef OPENSSL_EXTRA
dName->oIdx = cert->srcIdx;
dName->oLen = strLen;
#endif /* OPENSSL_EXTRA */
}
else if (id == ASN_ORGUNIT_NAME) {
if (!tooBig) {
XMEMCPY(&full[idx], "/OU=", 4);
idx += 4;
copy = TRUE;
}
#ifdef WOLFSSL_CERT_GEN
if (nameType == SUBJECT) {
cert->subjectOU = (char*)&cert->source[cert->srcIdx];
cert->subjectOULen = strLen;
cert->subjectOUEnc = b;
}
#endif /* WOLFSSL_CERT_GEN */
#ifdef OPENSSL_EXTRA
dName->ouIdx = cert->srcIdx;
dName->ouLen = strLen;
#endif /* OPENSSL_EXTRA */
}
else if (id == ASN_SERIAL_NUMBER) {
if (!tooBig) {
XMEMCPY(&full[idx], "/serialNumber=", 14);
idx += 14;
copy = TRUE;
}
#ifdef OPENSSL_EXTRA
dName->snIdx = cert->srcIdx;
dName->snLen = strLen;
#endif /* OPENSSL_EXTRA */
}
if (copy && !tooBig) {
XMEMCPY(&full[idx], &cert->source[cert->srcIdx], strLen);
idx += strLen;
}
cert->srcIdx += strLen;
}
else {
/* skip */
byte email = FALSE;
byte uid = FALSE;
int adv;
if (joint[0] == 0x2a && joint[1] == 0x86) /* email id hdr */
email = TRUE;
if (joint[0] == 0x9 && joint[1] == 0x92) /* uid id hdr */
uid = TRUE;
cert->srcIdx += oidSz + 1;
if (GetLength(cert->source, &cert->srcIdx, &adv, cert->maxIdx) < 0)
return ASN_PARSE_E;
if (adv > (int)(ASN_NAME_MAX - idx)) {
WOLFSSL_MSG("ASN name too big, skipping");
tooBig = TRUE;
}
if (email) {
if ( (14 + adv) > (int)(ASN_NAME_MAX - idx)) {
WOLFSSL_MSG("ASN name too big, skipping");
tooBig = TRUE;
}
if (!tooBig) {
XMEMCPY(&full[idx], "/emailAddress=", 14);
idx += 14;
}
#ifdef WOLFSSL_CERT_GEN
if (nameType == SUBJECT) {
cert->subjectEmail = (char*)&cert->source[cert->srcIdx];
cert->subjectEmailLen = adv;
}
#endif /* WOLFSSL_CERT_GEN */
#ifdef OPENSSL_EXTRA
dName->emailIdx = cert->srcIdx;
dName->emailLen = adv;
#endif /* OPENSSL_EXTRA */
#ifndef IGNORE_NAME_CONSTRAINTS
{
DNS_entry* emailName = NULL;
emailName = (DNS_entry*)XMALLOC(sizeof(DNS_entry),
cert->heap, DYNAMIC_TYPE_ALTNAME);
if (emailName == NULL) {
WOLFSSL_MSG("\tOut of Memory");
return MEMORY_E;
}
emailName->name = (char*)XMALLOC(adv + 1,
cert->heap, DYNAMIC_TYPE_ALTNAME);
if (emailName->name == NULL) {
WOLFSSL_MSG("\tOut of Memory");
return MEMORY_E;
}
XMEMCPY(emailName->name,
&cert->source[cert->srcIdx], adv);
emailName->name[adv] = 0;
emailName->next = cert->altEmailNames;
cert->altEmailNames = emailName;
}
#endif /* IGNORE_NAME_CONSTRAINTS */
if (!tooBig) {
XMEMCPY(&full[idx], &cert->source[cert->srcIdx], adv);
idx += adv;
}
}
if (uid) {
if ( (5 + adv) > (int)(ASN_NAME_MAX - idx)) {
WOLFSSL_MSG("ASN name too big, skipping");
tooBig = TRUE;
}
if (!tooBig) {
XMEMCPY(&full[idx], "/UID=", 5);
idx += 5;
XMEMCPY(&full[idx], &cert->source[cert->srcIdx], adv);
idx += adv;
}
#ifdef OPENSSL_EXTRA
dName->uidIdx = cert->srcIdx;
dName->uidLen = adv;
#endif /* OPENSSL_EXTRA */
}
cert->srcIdx += adv;
}
}
full[idx++] = 0;
#ifdef OPENSSL_EXTRA
{
int totalLen = 0;
if (dName->cnLen != 0)
totalLen += dName->cnLen + 4;
if (dName->snLen != 0)
totalLen += dName->snLen + 4;
if (dName->cLen != 0)
totalLen += dName->cLen + 3;
if (dName->lLen != 0)
totalLen += dName->lLen + 3;
if (dName->stLen != 0)
totalLen += dName->stLen + 4;
if (dName->oLen != 0)
totalLen += dName->oLen + 3;
if (dName->ouLen != 0)
totalLen += dName->ouLen + 4;
if (dName->emailLen != 0)
totalLen += dName->emailLen + 14;
if (dName->uidLen != 0)
totalLen += dName->uidLen + 5;
if (dName->serialLen != 0)
totalLen += dName->serialLen + 14;
dName->fullName = (char*)XMALLOC(totalLen + 1, NULL, DYNAMIC_TYPE_X509);
if (dName->fullName != NULL) {
idx = 0;
if (dName->cnLen != 0) {
dName->entryCount++;
XMEMCPY(&dName->fullName[idx], "/CN=", 4);
idx += 4;
XMEMCPY(&dName->fullName[idx],
&cert->source[dName->cnIdx], dName->cnLen);
dName->cnIdx = idx;
idx += dName->cnLen;
}
if (dName->snLen != 0) {
dName->entryCount++;
XMEMCPY(&dName->fullName[idx], "/SN=", 4);
idx += 4;
XMEMCPY(&dName->fullName[idx],
&cert->source[dName->snIdx], dName->snLen);
dName->snIdx = idx;
idx += dName->snLen;
}
if (dName->cLen != 0) {
dName->entryCount++;
XMEMCPY(&dName->fullName[idx], "/C=", 3);
idx += 3;
XMEMCPY(&dName->fullName[idx],
&cert->source[dName->cIdx], dName->cLen);
dName->cIdx = idx;
idx += dName->cLen;
}
if (dName->lLen != 0) {
dName->entryCount++;
XMEMCPY(&dName->fullName[idx], "/L=", 3);
idx += 3;
XMEMCPY(&dName->fullName[idx],
&cert->source[dName->lIdx], dName->lLen);
dName->lIdx = idx;
idx += dName->lLen;
}
if (dName->stLen != 0) {
dName->entryCount++;
XMEMCPY(&dName->fullName[idx], "/ST=", 4);
idx += 4;
XMEMCPY(&dName->fullName[idx],
&cert->source[dName->stIdx], dName->stLen);
dName->stIdx = idx;
idx += dName->stLen;
}
if (dName->oLen != 0) {
dName->entryCount++;
XMEMCPY(&dName->fullName[idx], "/O=", 3);
idx += 3;
XMEMCPY(&dName->fullName[idx],
&cert->source[dName->oIdx], dName->oLen);
dName->oIdx = idx;
idx += dName->oLen;
}
if (dName->ouLen != 0) {
dName->entryCount++;
XMEMCPY(&dName->fullName[idx], "/OU=", 4);
idx += 4;
XMEMCPY(&dName->fullName[idx],
&cert->source[dName->ouIdx], dName->ouLen);
dName->ouIdx = idx;
idx += dName->ouLen;
}
if (dName->emailLen != 0) {
dName->entryCount++;
XMEMCPY(&dName->fullName[idx], "/emailAddress=", 14);
idx += 14;
XMEMCPY(&dName->fullName[idx],
&cert->source[dName->emailIdx], dName->emailLen);
dName->emailIdx = idx;
idx += dName->emailLen;
}
if (dName->uidLen != 0) {
dName->entryCount++;
XMEMCPY(&dName->fullName[idx], "/UID=", 5);
idx += 5;
XMEMCPY(&dName->fullName[idx],
&cert->source[dName->uidIdx], dName->uidLen);
dName->uidIdx = idx;
idx += dName->uidLen;
}
if (dName->serialLen != 0) {
dName->entryCount++;
XMEMCPY(&dName->fullName[idx], "/serialNumber=", 14);
idx += 14;
XMEMCPY(&dName->fullName[idx],
&cert->source[dName->serialIdx], dName->serialLen);
dName->serialIdx = idx;
idx += dName->serialLen;
}
dName->fullName[idx] = '\0';
dName->fullNameLen = totalLen;
}
}
#endif /* OPENSSL_EXTRA */
return 0;
}
#ifndef NO_TIME_H
/* to the second */
static int DateGreaterThan(const struct tm* a, const struct tm* b)
{
if (a->tm_year > b->tm_year)
return 1;
if (a->tm_year == b->tm_year && a->tm_mon > b->tm_mon)
return 1;
if (a->tm_year == b->tm_year && a->tm_mon == b->tm_mon &&
a->tm_mday > b->tm_mday)
return 1;
if (a->tm_year == b->tm_year && a->tm_mon == b->tm_mon &&
a->tm_mday == b->tm_mday && a->tm_hour > b->tm_hour)
return 1;
if (a->tm_year == b->tm_year && a->tm_mon == b->tm_mon &&
a->tm_mday == b->tm_mday && a->tm_hour == b->tm_hour &&
a->tm_min > b->tm_min)
return 1;
if (a->tm_year == b->tm_year && a->tm_mon == b->tm_mon &&
a->tm_mday == b->tm_mday && a->tm_hour == b->tm_hour &&
a->tm_min == b->tm_min && a->tm_sec > b->tm_sec)
return 1;
return 0; /* false */
}
static INLINE int DateLessThan(const struct tm* a, const struct tm* b)
{
return DateGreaterThan(b,a);
}
/* like atoi but only use first byte */
/* Make sure before and after dates are valid */
int ValidateDate(const byte* date, byte format, int dateType)
{
time_t ltime;
struct tm certTime;
struct tm* localTime;
struct tm* tmpTime = NULL;
int i = 0;
#if defined(FREESCALE_MQX) || defined(TIME_OVERRIDES)
struct tm tmpTimeStorage;
tmpTime = &tmpTimeStorage;
#else
(void)tmpTime;
#endif
ltime = XTIME(0);
XMEMSET(&certTime, 0, sizeof(certTime));
if (format == ASN_UTC_TIME) {
if (btoi(date[0]) >= 5)
certTime.tm_year = 1900;
else
certTime.tm_year = 2000;
}
else { /* format == GENERALIZED_TIME */
certTime.tm_year += btoi(date[i++]) * 1000;
certTime.tm_year += btoi(date[i++]) * 100;
}
/* adjust tm_year, tm_mon */
GetTime((int*)&certTime.tm_year, date, &i); certTime.tm_year -= 1900;
GetTime((int*)&certTime.tm_mon, date, &i); certTime.tm_mon -= 1;
GetTime((int*)&certTime.tm_mday, date, &i);
GetTime((int*)&certTime.tm_hour, date, &i);
GetTime((int*)&certTime.tm_min, date, &i);
GetTime((int*)&certTime.tm_sec, date, &i);
if (date[i] != 'Z') { /* only Zulu supported for this profile */
WOLFSSL_MSG("Only Zulu time supported for this profile");
return 0;
}
localTime = XGMTIME(&ltime, tmpTime);
if (dateType == BEFORE) {
if (DateLessThan(localTime, &certTime))
return 0;
}
else
if (DateGreaterThan(localTime, &certTime))
return 0;
return 1;
}
#endif /* NO_TIME_H */
static int GetDate(DecodedCert* cert, int dateType)
{
int length;
byte date[MAX_DATE_SIZE];
byte b;
word32 startIdx = 0;
if (dateType == BEFORE)
cert->beforeDate = &cert->source[cert->srcIdx];
else
cert->afterDate = &cert->source[cert->srcIdx];
startIdx = cert->srcIdx;
b = cert->source[cert->srcIdx++];
if (b != ASN_UTC_TIME && b != ASN_GENERALIZED_TIME)
return ASN_TIME_E;
if (GetLength(cert->source, &cert->srcIdx, &length, cert->maxIdx) < 0)
return ASN_PARSE_E;
if (length > MAX_DATE_SIZE || length < MIN_DATE_SIZE)
return ASN_DATE_SZ_E;
XMEMCPY(date, &cert->source[cert->srcIdx], length);
cert->srcIdx += length;
if (dateType == BEFORE)
cert->beforeDateLen = cert->srcIdx - startIdx;
else
cert->afterDateLen = cert->srcIdx - startIdx;
if (!XVALIDATE_DATE(date, b, dateType)) {
if (dateType == BEFORE)
return ASN_BEFORE_DATE_E;
else
return ASN_AFTER_DATE_E;
}
return 0;
}
static int GetValidity(DecodedCert* cert, int verify)
{
int length;
int badDate = 0;
if (GetSequence(cert->source, &cert->srcIdx, &length, cert->maxIdx) < 0)
return ASN_PARSE_E;
if (GetDate(cert, BEFORE) < 0 && verify)
badDate = ASN_BEFORE_DATE_E; /* continue parsing */
if (GetDate(cert, AFTER) < 0 && verify)
return ASN_AFTER_DATE_E;
if (badDate != 0)
return badDate;
return 0;
}
int DecodeToKey(DecodedCert* cert, int verify)
{
int badDate = 0;
int ret;
if ( (ret = GetCertHeader(cert)) < 0)
return ret;
WOLFSSL_MSG("Got Cert Header");
if ( (ret = GetAlgoId(cert->source, &cert->srcIdx, &cert->signatureOID,
cert->maxIdx)) < 0)
return ret;
WOLFSSL_MSG("Got Algo ID");
if ( (ret = GetName(cert, ISSUER)) < 0)
return ret;
if ( (ret = GetValidity(cert, verify)) < 0)
badDate = ret;
if ( (ret = GetName(cert, SUBJECT)) < 0)
return ret;
WOLFSSL_MSG("Got Subject Name");
if ( (ret = GetKey(cert)) < 0)
return ret;
WOLFSSL_MSG("Got Key");
if (badDate != 0)
return badDate;
return ret;
}
static int GetSignature(DecodedCert* cert)
{
int length;
byte b = cert->source[cert->srcIdx++];
if (b != ASN_BIT_STRING)
return ASN_BITSTR_E;
if (GetLength(cert->source, &cert->srcIdx, &length, cert->maxIdx) < 0)
return ASN_PARSE_E;
cert->sigLength = length;
b = cert->source[cert->srcIdx++];
if (b != 0x00)
return ASN_EXPECT_0_E;
cert->sigLength--;
cert->signature = &cert->source[cert->srcIdx];
cert->srcIdx += cert->sigLength;
return 0;
}
static word32 SetDigest(const byte* digest, word32 digSz, byte* output)
{
output[0] = ASN_OCTET_STRING;
output[1] = (byte)digSz;
XMEMCPY(&output[2], digest, digSz);
return digSz + 2;
}
static word32 BytePrecision(word32 value)
{
word32 i;
for (i = sizeof(value); i; --i)
if (value >> ((i - 1) * WOLFSSL_BIT_SIZE))
break;
return i;
}
WOLFSSL_LOCAL word32 SetLength(word32 length, byte* output)
{
word32 i = 0, j;
if (length < ASN_LONG_LENGTH)
output[i++] = (byte)length;
else {
output[i++] = (byte)(BytePrecision(length) | ASN_LONG_LENGTH);
for (j = BytePrecision(length); j; --j) {
output[i] = (byte)(length >> ((j - 1) * WOLFSSL_BIT_SIZE));
i++;
}
}
return i;
}
WOLFSSL_LOCAL word32 SetSequence(word32 len, byte* output)
{
output[0] = ASN_SEQUENCE | ASN_CONSTRUCTED;
return SetLength(len, output + 1) + 1;
}
WOLFSSL_LOCAL word32 SetOctetString(word32 len, byte* output)
{
output[0] = ASN_OCTET_STRING;
return SetLength(len, output + 1) + 1;
}
/* Write a set header to output */
WOLFSSL_LOCAL word32 SetSet(word32 len, byte* output)
{
output[0] = ASN_SET | ASN_CONSTRUCTED;
return SetLength(len, output + 1) + 1;
}
WOLFSSL_LOCAL word32 SetImplicit(byte tag, byte number, word32 len, byte* output)
{
output[0] = ((tag == ASN_SEQUENCE || tag == ASN_SET) ? ASN_CONSTRUCTED : 0)
| ASN_CONTEXT_SPECIFIC | number;
return SetLength(len, output + 1) + 1;
}
WOLFSSL_LOCAL word32 SetExplicit(byte number, word32 len, byte* output)
{
output[0] = ASN_CONSTRUCTED | ASN_CONTEXT_SPECIFIC | number;
return SetLength(len, output + 1) + 1;
}
#if defined(HAVE_ECC) && (defined(WOLFSSL_CERT_GEN) || defined(WOLFSSL_KEY_GEN))
static word32 SetCurve(ecc_key* key, byte* output)
{
/* curve types */
#if defined(HAVE_ALL_CURVES) || defined(HAVE_ECC192)
static const byte ECC_192v1_AlgoID[] = { 0x2a, 0x86, 0x48, 0xCE, 0x3d,
0x03, 0x01, 0x01};
#endif
#if defined(HAVE_ALL_CURVES) || !defined(NO_ECC256)
static const byte ECC_256v1_AlgoID[] = { 0x2a, 0x86, 0x48, 0xCE, 0x3d,
0x03, 0x01, 0x07};
#endif
#if defined(HAVE_ALL_CURVES) || defined(HAVE_ECC160)
static const byte ECC_160r1_AlgoID[] = { 0x2b, 0x81, 0x04, 0x00,
0x02};
#endif
#if defined(HAVE_ALL_CURVES) || defined(HAVE_ECC224)
static const byte ECC_224r1_AlgoID[] = { 0x2b, 0x81, 0x04, 0x00,
0x21};
#endif
#if defined(HAVE_ALL_CURVES) || defined(HAVE_ECC384)
static const byte ECC_384r1_AlgoID[] = { 0x2b, 0x81, 0x04, 0x00,
0x22};
#endif
#if defined(HAVE_ALL_CURVES) || defined(HAVE_ECC521)
static const byte ECC_521r1_AlgoID[] = { 0x2b, 0x81, 0x04, 0x00,
0x23};
#endif
int oidSz = 0;
int idx = 0;
int lenSz = 0;
const byte* oid = 0;
output[0] = ASN_OBJECT_ID;
idx++;
switch (key->dp->size) {
#if defined(HAVE_ALL_CURVES) || defined(HAVE_ECC160)
case 20:
oidSz = sizeof(ECC_160r1_AlgoID);
oid = ECC_160r1_AlgoID;
break;
#endif
#if defined(HAVE_ALL_CURVES) || defined(HAVE_ECC192)
case 24:
oidSz = sizeof(ECC_192v1_AlgoID);
oid = ECC_192v1_AlgoID;
break;
#endif
#if defined(HAVE_ALL_CURVES) || defined(HAVE_ECC224)
case 28:
oidSz = sizeof(ECC_224r1_AlgoID);
oid = ECC_224r1_AlgoID;
break;
#endif
#if defined(HAVE_ALL_CURVES) || !defined(NO_ECC256)
case 32:
oidSz = sizeof(ECC_256v1_AlgoID);
oid = ECC_256v1_AlgoID;
break;
#endif
#if defined(HAVE_ALL_CURVES) || defined(HAVE_ECC384)
case 48:
oidSz = sizeof(ECC_384r1_AlgoID);
oid = ECC_384r1_AlgoID;
break;
#endif
#if defined(HAVE_ALL_CURVES) || defined(HAVE_ECC521)
case 66:
oidSz = sizeof(ECC_521r1_AlgoID);
oid = ECC_521r1_AlgoID;
break;
#endif
default:
return ASN_UNKNOWN_OID_E;
}
lenSz = SetLength(oidSz, output+idx);
idx += lenSz;
XMEMCPY(output+idx, oid, oidSz);
idx += oidSz;
return idx;
}
#endif /* HAVE_ECC && WOLFSSL_CERT_GEN */
WOLFSSL_LOCAL word32 SetAlgoID(int algoOID, byte* output, int type, int curveSz)
{
/* adding TAG_NULL and 0 to end */
/* hashTypes */
static const byte shaAlgoID[] = { 0x2b, 0x0e, 0x03, 0x02, 0x1a,
0x05, 0x00 };
static const byte sha256AlgoID[] = { 0x60, 0x86, 0x48, 0x01, 0x65, 0x03,
0x04, 0x02, 0x01, 0x05, 0x00 };
static const byte sha384AlgoID[] = { 0x60, 0x86, 0x48, 0x01, 0x65, 0x03,
0x04, 0x02, 0x02, 0x05, 0x00 };
static const byte sha512AlgoID[] = { 0x60, 0x86, 0x48, 0x01, 0x65, 0x03,
0x04, 0x02, 0x03, 0x05, 0x00 };
static const byte md5AlgoID[] = { 0x2a, 0x86, 0x48, 0x86, 0xf7, 0x0d,
0x02, 0x05, 0x05, 0x00 };
static const byte md2AlgoID[] = { 0x2a, 0x86, 0x48, 0x86, 0xf7, 0x0d,
0x02, 0x02, 0x05, 0x00};
/* blkTypes, no NULL tags because IV is there instead */
static const byte desCbcAlgoID[] = { 0x2B, 0x0E, 0x03, 0x02, 0x07 };
static const byte des3CbcAlgoID[] = { 0x2A, 0x86, 0x48, 0x86, 0xF7,
0x0D, 0x03, 0x07 };
/* RSA sigTypes */
#ifndef NO_RSA
static const byte md5wRSA_AlgoID[] = { 0x2a, 0x86, 0x48, 0x86, 0xf7,
0x0d, 0x01, 0x01, 0x04, 0x05, 0x00};
static const byte shawRSA_AlgoID[] = { 0x2a, 0x86, 0x48, 0x86, 0xf7,
0x0d, 0x01, 0x01, 0x05, 0x05, 0x00};
static const byte sha256wRSA_AlgoID[] = { 0x2a, 0x86, 0x48, 0x86, 0xf7,
0x0d, 0x01, 0x01, 0x0b, 0x05, 0x00};
static const byte sha384wRSA_AlgoID[] = {0x2a, 0x86, 0x48, 0x86, 0xf7,
0x0d, 0x01, 0x01, 0x0c, 0x05, 0x00};
static const byte sha512wRSA_AlgoID[] = {0x2a, 0x86, 0x48, 0x86, 0xf7,
0x0d, 0x01, 0x01, 0x0d, 0x05, 0x00};
#endif /* NO_RSA */
/* ECDSA sigTypes */
#ifdef HAVE_ECC
static const byte shawECDSA_AlgoID[] = { 0x2a, 0x86, 0x48, 0xCE, 0x3d,
0x04, 0x01, 0x05, 0x00};
static const byte sha256wECDSA_AlgoID[] = { 0x2a, 0x86, 0x48, 0xCE,0x3d,
0x04, 0x03, 0x02, 0x05, 0x00};
static const byte sha384wECDSA_AlgoID[] = { 0x2a, 0x86, 0x48, 0xCE,0x3d,
0x04, 0x03, 0x03, 0x05, 0x00};
static const byte sha512wECDSA_AlgoID[] = { 0x2a, 0x86, 0x48, 0xCE,0x3d,
0x04, 0x03, 0x04, 0x05, 0x00};
#endif /* HAVE_ECC */
/* RSA keyType */
#ifndef NO_RSA
static const byte RSA_AlgoID[] = { 0x2a, 0x86, 0x48, 0x86, 0xf7, 0x0d,
0x01, 0x01, 0x01, 0x05, 0x00};
#endif /* NO_RSA */
#ifdef HAVE_ECC
/* ECC keyType */
/* no tags, so set tagSz smaller later */
static const byte ECC_AlgoID[] = { 0x2a, 0x86, 0x48, 0xCE, 0x3d,
0x02, 0x01};
#endif /* HAVE_ECC */
int algoSz = 0;
int tagSz = 2; /* tag null and terminator */
word32 idSz, seqSz;
const byte* algoName = 0;
byte ID_Length[MAX_LENGTH_SZ];
byte seqArray[MAX_SEQ_SZ + 1]; /* add object_id to end */
if (type == hashType) {
switch (algoOID) {
case SHAh:
algoSz = sizeof(shaAlgoID);
algoName = shaAlgoID;
break;
case SHA256h:
algoSz = sizeof(sha256AlgoID);
algoName = sha256AlgoID;
break;
case SHA384h:
algoSz = sizeof(sha384AlgoID);
algoName = sha384AlgoID;
break;
case SHA512h:
algoSz = sizeof(sha512AlgoID);
algoName = sha512AlgoID;
break;
case MD2h:
algoSz = sizeof(md2AlgoID);
algoName = md2AlgoID;
break;
case MD5h:
algoSz = sizeof(md5AlgoID);
algoName = md5AlgoID;
break;
default:
WOLFSSL_MSG("Unknown Hash Algo");
return 0; /* UNKOWN_HASH_E; */
}
}
else if (type == blkType) {
switch (algoOID) {
case DESb:
algoSz = sizeof(desCbcAlgoID);
algoName = desCbcAlgoID;
tagSz = 0;
break;
case DES3b:
algoSz = sizeof(des3CbcAlgoID);
algoName = des3CbcAlgoID;
tagSz = 0;
break;
default:
WOLFSSL_MSG("Unknown Block Algo");
return 0;
}
}
else if (type == sigType) { /* sigType */
switch (algoOID) {
#ifndef NO_RSA
case CTC_MD5wRSA:
algoSz = sizeof(md5wRSA_AlgoID);
algoName = md5wRSA_AlgoID;
break;
case CTC_SHAwRSA:
algoSz = sizeof(shawRSA_AlgoID);
algoName = shawRSA_AlgoID;
break;
case CTC_SHA256wRSA:
algoSz = sizeof(sha256wRSA_AlgoID);
algoName = sha256wRSA_AlgoID;
break;
case CTC_SHA384wRSA:
algoSz = sizeof(sha384wRSA_AlgoID);
algoName = sha384wRSA_AlgoID;
break;
case CTC_SHA512wRSA:
algoSz = sizeof(sha512wRSA_AlgoID);
algoName = sha512wRSA_AlgoID;
break;
#endif /* NO_RSA */
#ifdef HAVE_ECC
case CTC_SHAwECDSA:
algoSz = sizeof(shawECDSA_AlgoID);
algoName = shawECDSA_AlgoID;
break;
case CTC_SHA256wECDSA:
algoSz = sizeof(sha256wECDSA_AlgoID);
algoName = sha256wECDSA_AlgoID;
break;
case CTC_SHA384wECDSA:
algoSz = sizeof(sha384wECDSA_AlgoID);
algoName = sha384wECDSA_AlgoID;
break;
case CTC_SHA512wECDSA:
algoSz = sizeof(sha512wECDSA_AlgoID);
algoName = sha512wECDSA_AlgoID;
break;
#endif /* HAVE_ECC */
default:
WOLFSSL_MSG("Unknown Signature Algo");
return 0;
}
}
else if (type == keyType) { /* keyType */
switch (algoOID) {
#ifndef NO_RSA
case RSAk:
algoSz = sizeof(RSA_AlgoID);
algoName = RSA_AlgoID;
break;
#endif /* NO_RSA */
#ifdef HAVE_ECC
case ECDSAk:
algoSz = sizeof(ECC_AlgoID);
algoName = ECC_AlgoID;
tagSz = 0;
break;
#endif /* HAVE_ECC */
default:
WOLFSSL_MSG("Unknown Key Algo");
return 0;
}
}
else {
WOLFSSL_MSG("Unknown Algo type");
return 0;
}
idSz = SetLength(algoSz - tagSz, ID_Length); /* don't include tags */
seqSz = SetSequence(idSz + algoSz + 1 + curveSz, seqArray);
/* +1 for object id, curveID of curveSz follows for ecc */
seqArray[seqSz++] = ASN_OBJECT_ID;
XMEMCPY(output, seqArray, seqSz);
XMEMCPY(output + seqSz, ID_Length, idSz);
XMEMCPY(output + seqSz + idSz, algoName, algoSz);
return seqSz + idSz + algoSz;
}
word32 wc_EncodeSignature(byte* out, const byte* digest, word32 digSz,
int hashOID)
{
byte digArray[MAX_ENCODED_DIG_SZ];
byte algoArray[MAX_ALGO_SZ];
byte seqArray[MAX_SEQ_SZ];
word32 encDigSz, algoSz, seqSz;
encDigSz = SetDigest(digest, digSz, digArray);
algoSz = SetAlgoID(hashOID, algoArray, hashType, 0);
seqSz = SetSequence(encDigSz + algoSz, seqArray);
XMEMCPY(out, seqArray, seqSz);
XMEMCPY(out + seqSz, algoArray, algoSz);
XMEMCPY(out + seqSz + algoSz, digArray, encDigSz);
return encDigSz + algoSz + seqSz;
}
int wc_GetCTC_HashOID(int type)
{
switch (type) {
#ifdef WOLFSSL_MD2
case MD2:
return MD2h;
#endif
#ifndef NO_MD5
case MD5:
return MD5h;
#endif
#ifndef NO_SHA
case SHA:
return SHAh;
#endif
#ifndef NO_SHA256
case SHA256:
return SHA256h;
#endif
#ifdef WOLFSSL_SHA384
case SHA384:
return SHA384h;
#endif
#ifdef WOLFSSL_SHA512
case SHA512:
return SHA512h;
#endif
default:
return 0;
};
}
/* return true (1) or false (0) for Confirmation */
static int ConfirmSignature(const byte* buf, word32 bufSz,
const byte* key, word32 keySz, word32 keyOID,
const byte* sig, word32 sigSz, word32 sigOID,
void* heap)
{
int typeH = 0, digestSz = 0, ret = 0;
#ifdef WOLFSSL_SMALL_STACK
byte* digest;
#else
byte digest[MAX_DIGEST_SIZE];
#endif
#ifdef WOLFSSL_SMALL_STACK
digest = (byte*)XMALLOC(MAX_DIGEST_SIZE, NULL, DYNAMIC_TYPE_TMP_BUFFER);
if (digest == NULL)
return 0; /* not confirmed */
#endif
(void)key;
(void)keySz;
(void)sig;
(void)sigSz;
(void)heap;
switch (sigOID) {
#ifndef NO_MD5
case CTC_MD5wRSA:
if (wc_Md5Hash(buf, bufSz, digest) == 0) {
typeH = MD5h;
digestSz = MD5_DIGEST_SIZE;
}
break;
#endif
#if defined(WOLFSSL_MD2)
case CTC_MD2wRSA:
if (wc_Md2Hash(buf, bufSz, digest) == 0) {
typeH = MD2h;
digestSz = MD2_DIGEST_SIZE;
}
break;
#endif
#ifndef NO_SHA
case CTC_SHAwRSA:
case CTC_SHAwDSA:
case CTC_SHAwECDSA:
if (wc_ShaHash(buf, bufSz, digest) == 0) {
typeH = SHAh;
digestSz = SHA_DIGEST_SIZE;
}
break;
#endif
#ifndef NO_SHA256
case CTC_SHA256wRSA:
case CTC_SHA256wECDSA:
if (wc_Sha256Hash(buf, bufSz, digest) == 0) {
typeH = SHA256h;
digestSz = SHA256_DIGEST_SIZE;
}
break;
#endif
#ifdef WOLFSSL_SHA512
case CTC_SHA512wRSA:
case CTC_SHA512wECDSA:
if (wc_Sha512Hash(buf, bufSz, digest) == 0) {
typeH = SHA512h;
digestSz = SHA512_DIGEST_SIZE;
}
break;
#endif
#ifdef WOLFSSL_SHA384
case CTC_SHA384wRSA:
case CTC_SHA384wECDSA:
if (wc_Sha384Hash(buf, bufSz, digest) == 0) {
typeH = SHA384h;
digestSz = SHA384_DIGEST_SIZE;
}
break;
#endif
default:
WOLFSSL_MSG("Verify Signautre has unsupported type");
}
if (typeH == 0) {
#ifdef WOLFSSL_SMALL_STACK
XFREE(digest, NULL, DYNAMIC_TYPE_TMP_BUFFER);
#endif
return 0; /* not confirmed */
}
switch (keyOID) {
#ifndef NO_RSA
case RSAk:
{
word32 idx = 0;
int encodedSigSz, verifySz;
byte* out;
#ifdef WOLFSSL_SMALL_STACK
RsaKey* pubKey;
byte* plain;
byte* encodedSig;
#else
RsaKey pubKey[1];
byte plain[MAX_ENCODED_SIG_SZ];
byte encodedSig[MAX_ENCODED_SIG_SZ];
#endif
#ifdef WOLFSSL_SMALL_STACK
pubKey = (RsaKey*)XMALLOC(sizeof(RsaKey), NULL,
DYNAMIC_TYPE_TMP_BUFFER);
plain = (byte*)XMALLOC(MAX_ENCODED_SIG_SZ, NULL,
DYNAMIC_TYPE_TMP_BUFFER);
encodedSig = (byte*)XMALLOC(MAX_ENCODED_SIG_SZ, NULL,
DYNAMIC_TYPE_TMP_BUFFER);
if (pubKey == NULL || plain == NULL || encodedSig == NULL) {
WOLFSSL_MSG("Failed to allocate memory at ConfirmSignature");
if (pubKey)
XFREE(pubKey, NULL, DYNAMIC_TYPE_TMP_BUFFER);
if (plain)
XFREE(plain, NULL, DYNAMIC_TYPE_TMP_BUFFER);
if (encodedSig)
XFREE(encodedSig, NULL, DYNAMIC_TYPE_TMP_BUFFER);
break; /* not confirmed */
}
#endif
if (sigSz > MAX_ENCODED_SIG_SZ) {
WOLFSSL_MSG("Verify Signautre is too big");
}
else if (wc_InitRsaKey(pubKey, heap) != 0) {
WOLFSSL_MSG("InitRsaKey failed");
}
else if (wc_RsaPublicKeyDecode(key, &idx, pubKey, keySz) < 0) {
WOLFSSL_MSG("ASN Key decode error RSA");
}
else {
XMEMCPY(plain, sig, sigSz);
if ((verifySz = wc_RsaSSL_VerifyInline(plain, sigSz, &out,
pubKey)) < 0) {
WOLFSSL_MSG("Rsa SSL verify error");
}
else {
/* make sure we're right justified */
encodedSigSz =
wc_EncodeSignature(encodedSig, digest, digestSz, typeH);
if (encodedSigSz != verifySz ||
XMEMCMP(out, encodedSig, encodedSigSz) != 0) {
WOLFSSL_MSG("Rsa SSL verify match encode error");
}
else
ret = 1; /* match */
#ifdef WOLFSSL_DEBUG_ENCODING
{
int x;
printf("wolfssl encodedSig:\n");
for (x = 0; x < encodedSigSz; x++) {
printf("%02x ", encodedSig[x]);
if ( (x % 16) == 15)
printf("\n");
}
printf("\n");
printf("actual digest:\n");
for (x = 0; x < verifySz; x++) {
printf("%02x ", out[x]);
if ( (x % 16) == 15)
printf("\n");
}
printf("\n");
}
#endif /* WOLFSSL_DEBUG_ENCODING */
}
}
wc_FreeRsaKey(pubKey);
#ifdef WOLFSSL_SMALL_STACK
XFREE(pubKey, NULL, DYNAMIC_TYPE_TMP_BUFFER);
XFREE(plain, NULL, DYNAMIC_TYPE_TMP_BUFFER);
XFREE(encodedSig, NULL, DYNAMIC_TYPE_TMP_BUFFER);
#endif
break;
}
#endif /* NO_RSA */
#ifdef HAVE_ECC
case ECDSAk:
{
int verify = 0;
#ifdef WOLFSSL_SMALL_STACK
ecc_key* pubKey;
#else
ecc_key pubKey[1];
#endif
#ifdef WOLFSSL_SMALL_STACK
pubKey = (ecc_key*)XMALLOC(sizeof(ecc_key), NULL,
DYNAMIC_TYPE_TMP_BUFFER);
if (pubKey == NULL) {
WOLFSSL_MSG("Failed to allocate pubKey");
break; /* not confirmed */
}
#endif
if (wc_ecc_init(pubKey) < 0) {
WOLFSSL_MSG("Failed to initialize key");
break; /* not confirmed */
}
if (wc_ecc_import_x963(key, keySz, pubKey) < 0) {
WOLFSSL_MSG("ASN Key import error ECC");
}
else {
if (wc_ecc_verify_hash(sig, sigSz, digest, digestSz, &verify,
pubKey) != 0) {
WOLFSSL_MSG("ECC verify hash error");
}
else if (1 != verify) {
WOLFSSL_MSG("ECC Verify didn't match");
} else
ret = 1; /* match */
}
wc_ecc_free(pubKey);
#ifdef WOLFSSL_SMALL_STACK
XFREE(pubKey, NULL, DYNAMIC_TYPE_TMP_BUFFER);
#endif
break;
}
#endif /* HAVE_ECC */
default:
WOLFSSL_MSG("Verify Key type unknown");
}
#ifdef WOLFSSL_SMALL_STACK
XFREE(digest, NULL, DYNAMIC_TYPE_TMP_BUFFER);
#endif
return ret;
}
#ifndef IGNORE_NAME_CONSTRAINTS
static int MatchBaseName(int type, const char* name, int nameSz,
const char* base, int baseSz)
{
if (base == NULL || baseSz <= 0 || name == NULL || nameSz <= 0 ||
name[0] == '.' || nameSz < baseSz ||
(type != ASN_RFC822_TYPE && type != ASN_DNS_TYPE))
return 0;
/* If an email type, handle special cases where the base is only
* a domain, or is an email address itself. */
if (type == ASN_RFC822_TYPE) {
const char* p = NULL;
int count = 0;
if (base[0] != '.') {
p = base;
count = 0;
/* find the '@' in the base */
while (*p != '@' && count < baseSz) {
count++;
p++;
}
/* No '@' in base, reset p to NULL */
if (count >= baseSz)
p = NULL;
}
if (p == NULL) {
/* Base isn't an email address, it is a domain name,
* wind the name forward one character past its '@'. */
p = name;
count = 0;
while (*p != '@' && count < baseSz) {
count++;
p++;
}
if (count < baseSz && *p == '@') {
name = p + 1;
nameSz -= count + 1;
}
}
}
if ((type == ASN_DNS_TYPE || type == ASN_RFC822_TYPE) && base[0] == '.') {
int szAdjust = nameSz - baseSz;
name += szAdjust;
nameSz -= szAdjust;
}
while (nameSz > 0) {
if (XTOLOWER((unsigned char)*name++) !=
XTOLOWER((unsigned char)*base++))
return 0;
nameSz--;
}
return 1;
}
static int ConfirmNameConstraints(Signer* signer, DecodedCert* cert)
{
if (signer == NULL || cert == NULL)
return 0;
/* Check against the excluded list */
if (signer->excludedNames) {
Base_entry* base = signer->excludedNames;
while (base != NULL) {
if (base->type == ASN_DNS_TYPE) {
DNS_entry* name = cert->altNames;
while (name != NULL) {
if (MatchBaseName(ASN_DNS_TYPE,
name->name, (int)XSTRLEN(name->name),
base->name, base->nameSz))
return 0;
name = name->next;
}
}
else if (base->type == ASN_RFC822_TYPE) {
DNS_entry* name = cert->altEmailNames;
while (name != NULL) {
if (MatchBaseName(ASN_RFC822_TYPE,
name->name, (int)XSTRLEN(name->name),
base->name, base->nameSz))
return 0;
name = name->next;
}
}
else if (base->type == ASN_DIR_TYPE) {
if (cert->subjectRawLen == base->nameSz &&
XMEMCMP(cert->subjectRaw, base->name, base->nameSz) == 0) {
return 0;
}
}
base = base->next;
}
}
/* Check against the permitted list */
if (signer->permittedNames != NULL) {
int needDns = 0;
int matchDns = 0;
int needEmail = 0;
int matchEmail = 0;
int needDir = 0;
int matchDir = 0;
Base_entry* base = signer->permittedNames;
while (base != NULL) {
if (base->type == ASN_DNS_TYPE) {
DNS_entry* name = cert->altNames;
if (name != NULL)
needDns = 1;
while (name != NULL) {
matchDns = MatchBaseName(ASN_DNS_TYPE,
name->name, (int)XSTRLEN(name->name),
base->name, base->nameSz);
name = name->next;
}
}
else if (base->type == ASN_RFC822_TYPE) {
DNS_entry* name = cert->altEmailNames;
if (name != NULL)
needEmail = 1;
while (name != NULL) {
matchEmail = MatchBaseName(ASN_DNS_TYPE,
name->name, (int)XSTRLEN(name->name),
base->name, base->nameSz);
name = name->next;
}
}
else if (base->type == ASN_DIR_TYPE) {
needDir = 1;
if (cert->subjectRaw != NULL &&
cert->subjectRawLen == base->nameSz &&
XMEMCMP(cert->subjectRaw, base->name, base->nameSz) == 0) {
matchDir = 1;
}
}
base = base->next;
}
if ((needDns && !matchDns) || (needEmail && !matchEmail) ||
(needDir && !matchDir)) {
return 0;
}
}
return 1;
}
#endif /* IGNORE_NAME_CONSTRAINTS */
static int DecodeAltNames(byte* input, int sz, DecodedCert* cert)
{
word32 idx = 0;
int length = 0;
WOLFSSL_ENTER("DecodeAltNames");
if (GetSequence(input, &idx, &length, sz) < 0) {
WOLFSSL_MSG("\tBad Sequence");
return ASN_PARSE_E;
}
cert->weOwnAltNames = 1;
while (length > 0) {
byte b = input[idx++];
length--;
/* Save DNS Type names in the altNames list. */
/* Save Other Type names in the cert's OidMap */
if (b == (ASN_CONTEXT_SPECIFIC | ASN_DNS_TYPE)) {
DNS_entry* dnsEntry;
int strLen;
word32 lenStartIdx = idx;
if (GetLength(input, &idx, &strLen, sz) < 0) {
WOLFSSL_MSG("\tfail: str length");
return ASN_PARSE_E;
}
length -= (idx - lenStartIdx);
dnsEntry = (DNS_entry*)XMALLOC(sizeof(DNS_entry), cert->heap,
DYNAMIC_TYPE_ALTNAME);
if (dnsEntry == NULL) {
WOLFSSL_MSG("\tOut of Memory");
return ASN_PARSE_E;
}
dnsEntry->name = (char*)XMALLOC(strLen + 1, cert->heap,
DYNAMIC_TYPE_ALTNAME);
if (dnsEntry->name == NULL) {
WOLFSSL_MSG("\tOut of Memory");
XFREE(dnsEntry, cert->heap, DYNAMIC_TYPE_ALTNAME);
return ASN_PARSE_E;
}
XMEMCPY(dnsEntry->name, &input[idx], strLen);
dnsEntry->name[strLen] = '\0';
dnsEntry->next = cert->altNames;
cert->altNames = dnsEntry;
length -= strLen;
idx += strLen;
}
#ifndef IGNORE_NAME_CONSTRAINTS
else if (b == (ASN_CONTEXT_SPECIFIC | ASN_RFC822_TYPE)) {
DNS_entry* emailEntry;
int strLen;
word32 lenStartIdx = idx;
if (GetLength(input, &idx, &strLen, sz) < 0) {
WOLFSSL_MSG("\tfail: str length");
return ASN_PARSE_E;
}
length -= (idx - lenStartIdx);
emailEntry = (DNS_entry*)XMALLOC(sizeof(DNS_entry), cert->heap,
DYNAMIC_TYPE_ALTNAME);
if (emailEntry == NULL) {
WOLFSSL_MSG("\tOut of Memory");
return ASN_PARSE_E;
}
emailEntry->name = (char*)XMALLOC(strLen + 1, cert->heap,
DYNAMIC_TYPE_ALTNAME);
if (emailEntry->name == NULL) {
WOLFSSL_MSG("\tOut of Memory");
XFREE(emailEntry, cert->heap, DYNAMIC_TYPE_ALTNAME);
return ASN_PARSE_E;
}
XMEMCPY(emailEntry->name, &input[idx], strLen);
emailEntry->name[strLen] = '\0';
emailEntry->next = cert->altEmailNames;
cert->altEmailNames = emailEntry;
length -= strLen;
idx += strLen;
}
#endif /* IGNORE_NAME_CONSTRAINTS */
#ifdef WOLFSSL_SEP
else if (b == (ASN_CONTEXT_SPECIFIC | ASN_CONSTRUCTED | ASN_OTHER_TYPE))
{
int strLen;
word32 lenStartIdx = idx;
word32 oid = 0;
if (GetLength(input, &idx, &strLen, sz) < 0) {
WOLFSSL_MSG("\tfail: other name length");
return ASN_PARSE_E;
}
/* Consume the rest of this sequence. */
length -= (strLen + idx - lenStartIdx);
if (GetObjectId(input, &idx, &oid, sz) < 0) {
WOLFSSL_MSG("\tbad OID");
return ASN_PARSE_E;
}
if (oid != HW_NAME_OID) {
WOLFSSL_MSG("\tincorrect OID");
return ASN_PARSE_E;
}
if (input[idx++] != (ASN_CONTEXT_SPECIFIC | ASN_CONSTRUCTED)) {
WOLFSSL_MSG("\twrong type");
return ASN_PARSE_E;
}
if (GetLength(input, &idx, &strLen, sz) < 0) {
WOLFSSL_MSG("\tfail: str len");
return ASN_PARSE_E;
}
if (GetSequence(input, &idx, &strLen, sz) < 0) {
WOLFSSL_MSG("\tBad Sequence");
return ASN_PARSE_E;
}
if (input[idx++] != ASN_OBJECT_ID) {
WOLFSSL_MSG("\texpected OID");
return ASN_PARSE_E;
}
if (GetLength(input, &idx, &strLen, sz) < 0) {
WOLFSSL_MSG("\tfailed: str len");
return ASN_PARSE_E;
}
cert->hwType = (byte*)XMALLOC(strLen, cert->heap, 0);
if (cert->hwType == NULL) {
WOLFSSL_MSG("\tOut of Memory");
return MEMORY_E;
}
XMEMCPY(cert->hwType, &input[idx], strLen);
cert->hwTypeSz = strLen;
idx += strLen;
if (input[idx++] != ASN_OCTET_STRING) {
WOLFSSL_MSG("\texpected Octet String");
return ASN_PARSE_E;
}
if (GetLength(input, &idx, &strLen, sz) < 0) {
WOLFSSL_MSG("\tfailed: str len");
return ASN_PARSE_E;
}
cert->hwSerialNum = (byte*)XMALLOC(strLen + 1, cert->heap, 0);
if (cert->hwSerialNum == NULL) {
WOLFSSL_MSG("\tOut of Memory");
return MEMORY_E;
}
XMEMCPY(cert->hwSerialNum, &input[idx], strLen);
cert->hwSerialNum[strLen] = '\0';
cert->hwSerialNumSz = strLen;
idx += strLen;
}
#endif /* WOLFSSL_SEP */
else {
int strLen;
word32 lenStartIdx = idx;
WOLFSSL_MSG("\tUnsupported name type, skipping");
if (GetLength(input, &idx, &strLen, sz) < 0) {
WOLFSSL_MSG("\tfail: unsupported name length");
return ASN_PARSE_E;
}
length -= (strLen + idx - lenStartIdx);
idx += strLen;
}
}
return 0;
}
static int DecodeBasicCaConstraint(byte* input, int sz, DecodedCert* cert)
{
word32 idx = 0;
int length = 0;
WOLFSSL_ENTER("DecodeBasicCaConstraint");
if (GetSequence(input, &idx, &length, sz) < 0) {
WOLFSSL_MSG("\tfail: bad SEQUENCE");
return ASN_PARSE_E;
}
if (length == 0)
return 0;
/* If the basic ca constraint is false, this extension may be named, but
* left empty. So, if the length is 0, just return. */
if (input[idx++] != ASN_BOOLEAN)
{
WOLFSSL_MSG("\tfail: constraint not BOOLEAN");
return ASN_PARSE_E;
}
if (GetLength(input, &idx, &length, sz) < 0)
{
WOLFSSL_MSG("\tfail: length");
return ASN_PARSE_E;
}
if (input[idx++])
cert->isCA = 1;
#ifdef OPENSSL_EXTRA
/* If there isn't any more data, return. */
if (idx >= (word32)sz)
return 0;
/* Anything left should be the optional pathlength */
if (input[idx++] != ASN_INTEGER) {
WOLFSSL_MSG("\tfail: pathlen not INTEGER");
return ASN_PARSE_E;
}
if (input[idx++] != 1) {
WOLFSSL_MSG("\tfail: pathlen too long");
return ASN_PARSE_E;
}
cert->pathLength = input[idx];
cert->extBasicConstPlSet = 1;
#endif /* OPENSSL_EXTRA */
return 0;
}
#define CRLDP_FULL_NAME 0
/* From RFC3280 SS4.2.1.14, Distribution Point Name*/
#define GENERALNAME_URI 6
/* From RFC3280 SS4.2.1.7, GeneralName */
static int DecodeCrlDist(byte* input, int sz, DecodedCert* cert)
{
word32 idx = 0;
int length = 0;
WOLFSSL_ENTER("DecodeCrlDist");
/* Unwrap the list of Distribution Points*/
if (GetSequence(input, &idx, &length, sz) < 0)
return ASN_PARSE_E;
/* Unwrap a single Distribution Point */
if (GetSequence(input, &idx, &length, sz) < 0)
return ASN_PARSE_E;
/* The Distribution Point has three explicit optional members
* First check for a DistributionPointName
*/
if (input[idx] == (ASN_CONSTRUCTED | ASN_CONTEXT_SPECIFIC | 0))
{
idx++;
if (GetLength(input, &idx, &length, sz) < 0)
return ASN_PARSE_E;
if (input[idx] ==
(ASN_CONTEXT_SPECIFIC | ASN_CONSTRUCTED | CRLDP_FULL_NAME))
{
idx++;
if (GetLength(input, &idx, &length, sz) < 0)
return ASN_PARSE_E;
if (input[idx] == (ASN_CONTEXT_SPECIFIC | GENERALNAME_URI))
{
idx++;
if (GetLength(input, &idx, &length, sz) < 0)
return ASN_PARSE_E;
cert->extCrlInfoSz = length;
cert->extCrlInfo = input + idx;
idx += length;
}
else
/* This isn't a URI, skip it. */
idx += length;
}
else
/* This isn't a FULLNAME, skip it. */
idx += length;
}
/* Check for reasonFlags */
if (idx < (word32)sz &&
input[idx] == (ASN_CONSTRUCTED | ASN_CONTEXT_SPECIFIC | 1))
{
idx++;
if (GetLength(input, &idx, &length, sz) < 0)
return ASN_PARSE_E;
idx += length;
}
/* Check for cRLIssuer */
if (idx < (word32)sz &&
input[idx] == (ASN_CONSTRUCTED | ASN_CONTEXT_SPECIFIC | 2))
{
idx++;
if (GetLength(input, &idx, &length, sz) < 0)
return ASN_PARSE_E;
idx += length;
}
if (idx < (word32)sz)
{
WOLFSSL_MSG("\tThere are more CRL Distribution Point records, "
"but we only use the first one.");
}
return 0;
}
static int DecodeAuthInfo(byte* input, int sz, DecodedCert* cert)
/*
* Read the first of the Authority Information Access records. If there are
* any issues, return without saving the record.
*/
{
word32 idx = 0;
int length = 0;
byte b;
word32 oid;
WOLFSSL_ENTER("DecodeAuthInfo");
/* Unwrap the list of AIAs */
if (GetSequence(input, &idx, &length, sz) < 0)
return ASN_PARSE_E;
while (idx < (word32)sz) {
/* Unwrap a single AIA */
if (GetSequence(input, &idx, &length, sz) < 0)
return ASN_PARSE_E;
oid = 0;
if (GetObjectId(input, &idx, &oid, sz) < 0)
return ASN_PARSE_E;
/* Only supporting URIs right now. */
b = input[idx++];
if (GetLength(input, &idx, &length, sz) < 0)
return ASN_PARSE_E;
if (b == (ASN_CONTEXT_SPECIFIC | GENERALNAME_URI) &&
oid == AIA_OCSP_OID)
{
cert->extAuthInfoSz = length;
cert->extAuthInfo = input + idx;
break;
}
idx += length;
}
return 0;
}
static int DecodeAuthKeyId(byte* input, int sz, DecodedCert* cert)
{
word32 idx = 0;
int length = 0, ret = 0;
WOLFSSL_ENTER("DecodeAuthKeyId");
if (GetSequence(input, &idx, &length, sz) < 0) {
WOLFSSL_MSG("\tfail: should be a SEQUENCE\n");
return ASN_PARSE_E;
}
if (input[idx++] != (ASN_CONTEXT_SPECIFIC | 0)) {
WOLFSSL_MSG("\tinfo: OPTIONAL item 0, not available\n");
return 0;
}
if (GetLength(input, &idx, &length, sz) < 0) {
WOLFSSL_MSG("\tfail: extension data length");
return ASN_PARSE_E;
}
#ifdef OPENSSL_EXTRA
cert->extAuthKeyIdSrc = &input[idx];
cert->extAuthKeyIdSz = length;
#endif /* OPENSSL_EXTRA */
if (length == KEYID_SIZE) {
XMEMCPY(cert->extAuthKeyId, input + idx, length);
}
else {
#ifdef NO_SHA
ret = wc_Sha256Hash(input + idx, length, cert->extAuthKeyId);
#else
ret = wc_ShaHash(input + idx, length, cert->extAuthKeyId);
#endif
}
return ret;
}
static int DecodeSubjKeyId(byte* input, int sz, DecodedCert* cert)
{
word32 idx = 0;
int length = 0, ret = 0;
WOLFSSL_ENTER("DecodeSubjKeyId");
if (input[idx++] != ASN_OCTET_STRING) {
WOLFSSL_MSG("\tfail: should be an OCTET STRING");
return ASN_PARSE_E;
}
if (GetLength(input, &idx, &length, sz) < 0) {
WOLFSSL_MSG("\tfail: extension data length");
return ASN_PARSE_E;
}
#ifdef OPENSSL_EXTRA
cert->extSubjKeyIdSrc = &input[idx];
cert->extSubjKeyIdSz = length;
#endif /* OPENSSL_EXTRA */
if (length == SIGNER_DIGEST_SIZE) {
XMEMCPY(cert->extSubjKeyId, input + idx, length);
}
else {
#ifdef NO_SHA
ret = wc_Sha256Hash(input + idx, length, cert->extSubjKeyId);
#else
ret = wc_ShaHash(input + idx, length, cert->extSubjKeyId);
#endif
}
return ret;
}
static int DecodeKeyUsage(byte* input, int sz, DecodedCert* cert)
{
word32 idx = 0;
int length;
byte unusedBits;
WOLFSSL_ENTER("DecodeKeyUsage");
if (input[idx++] != ASN_BIT_STRING) {
WOLFSSL_MSG("\tfail: key usage expected bit string");
return ASN_PARSE_E;
}
if (GetLength(input, &idx, &length, sz) < 0) {
WOLFSSL_MSG("\tfail: key usage bad length");
return ASN_PARSE_E;
}
unusedBits = input[idx++];
length--;
if (length == 2) {
cert->extKeyUsage = (word16)((input[idx] << 8) | input[idx+1]);
cert->extKeyUsage >>= unusedBits;
}
else if (length == 1)
cert->extKeyUsage = (word16)(input[idx] << 1);
return 0;
}
static int DecodeExtKeyUsage(byte* input, int sz, DecodedCert* cert)
{
word32 idx = 0, oid;
int length;
WOLFSSL_ENTER("DecodeExtKeyUsage");
if (GetSequence(input, &idx, &length, sz) < 0) {
WOLFSSL_MSG("\tfail: should be a SEQUENCE");
return ASN_PARSE_E;
}
#ifdef OPENSSL_EXTRA
cert->extExtKeyUsageSrc = input + idx;
cert->extExtKeyUsageSz = length;
#endif
while (idx < (word32)sz) {
if (GetObjectId(input, &idx, &oid, sz) < 0)
return ASN_PARSE_E;
switch (oid) {
case EKU_ANY_OID:
cert->extExtKeyUsage |= EXTKEYUSE_ANY;
break;
case EKU_SERVER_AUTH_OID:
cert->extExtKeyUsage |= EXTKEYUSE_SERVER_AUTH;
break;
case EKU_CLIENT_AUTH_OID:
cert->extExtKeyUsage |= EXTKEYUSE_CLIENT_AUTH;
break;
case EKU_OCSP_SIGN_OID:
cert->extExtKeyUsage |= EXTKEYUSE_OCSP_SIGN;
break;
}
#ifdef OPENSSL_EXTRA
cert->extExtKeyUsageCount++;
#endif
}
return 0;
}
#ifndef IGNORE_NAME_CONSTRAINTS
static int DecodeSubtree(byte* input, int sz, Base_entry** head, void* heap)
{
word32 idx = 0;
(void)heap;
while (idx < (word32)sz) {
int seqLength, strLength;
word32 nameIdx;
byte b;
if (GetSequence(input, &idx, &seqLength, sz) < 0) {
WOLFSSL_MSG("\tfail: should be a SEQUENCE");
return ASN_PARSE_E;
}
nameIdx = idx;
b = input[nameIdx++];
if (GetLength(input, &nameIdx, &strLength, sz) <= 0) {
WOLFSSL_MSG("\tinvalid length");
return ASN_PARSE_E;
}
if (b == (ASN_CONTEXT_SPECIFIC | ASN_DNS_TYPE) ||
b == (ASN_CONTEXT_SPECIFIC | ASN_RFC822_TYPE) ||
b == (ASN_CONTEXT_SPECIFIC | ASN_CONSTRUCTED | ASN_DIR_TYPE)) {
Base_entry* entry = (Base_entry*)XMALLOC(sizeof(Base_entry),
heap, DYNAMIC_TYPE_ALTNAME);
if (entry == NULL) {
WOLFSSL_MSG("allocate error");
return MEMORY_E;
}
entry->name = (char*)XMALLOC(strLength, heap, DYNAMIC_TYPE_ALTNAME);
if (entry->name == NULL) {
WOLFSSL_MSG("allocate error");
return MEMORY_E;
}
XMEMCPY(entry->name, &input[nameIdx], strLength);
entry->nameSz = strLength;
entry->type = b & 0x0F;
entry->next = *head;
*head = entry;
}
idx += seqLength;
}
return 0;
}
static int DecodeNameConstraints(byte* input, int sz, DecodedCert* cert)
{
word32 idx = 0;
int length = 0;
WOLFSSL_ENTER("DecodeNameConstraints");
if (GetSequence(input, &idx, &length, sz) < 0) {
WOLFSSL_MSG("\tfail: should be a SEQUENCE");
return ASN_PARSE_E;
}
while (idx < (word32)sz) {
byte b = input[idx++];
Base_entry** subtree = NULL;
if (GetLength(input, &idx, &length, sz) <= 0) {
WOLFSSL_MSG("\tinvalid length");
return ASN_PARSE_E;
}
if (b == (ASN_CONTEXT_SPECIFIC | ASN_CONSTRUCTED | 0))
subtree = &cert->permittedNames;
else if (b == (ASN_CONTEXT_SPECIFIC | ASN_CONSTRUCTED | 1))
subtree = &cert->excludedNames;
else {
WOLFSSL_MSG("\tinvalid subtree");
return ASN_PARSE_E;
}
DecodeSubtree(input + idx, length, subtree, cert->heap);
idx += length;
}
return 0;
}
#endif /* IGNORE_NAME_CONSTRAINTS */
#ifdef WOLFSSL_SEP
static int DecodeCertPolicy(byte* input, int sz, DecodedCert* cert)
{
word32 idx = 0;
int length = 0;
WOLFSSL_ENTER("DecodeCertPolicy");
/* Unwrap certificatePolicies */
if (GetSequence(input, &idx, &length, sz) < 0) {
WOLFSSL_MSG("\tdeviceType isn't OID");
return ASN_PARSE_E;
}
if (GetSequence(input, &idx, &length, sz) < 0) {
WOLFSSL_MSG("\tdeviceType isn't OID");
return ASN_PARSE_E;
}
if (input[idx++] != ASN_OBJECT_ID) {
WOLFSSL_MSG("\tdeviceType isn't OID");
return ASN_PARSE_E;
}
if (GetLength(input, &idx, &length, sz) < 0) {
WOLFSSL_MSG("\tCouldn't read length of deviceType");
return ASN_PARSE_E;
}
if (length > 0) {
cert->deviceType = (byte*)XMALLOC(length, cert->heap, 0);
if (cert->deviceType == NULL) {
WOLFSSL_MSG("\tCouldn't alloc memory for deviceType");
return MEMORY_E;
}
cert->deviceTypeSz = length;
XMEMCPY(cert->deviceType, input + idx, length);
}
WOLFSSL_LEAVE("DecodeCertPolicy", 0);
return 0;
}
#endif /* WOLFSSL_SEP */
static int DecodeCertExtensions(DecodedCert* cert)
/*
* Processing the Certificate Extensions. This does not modify the current
* index. It is works starting with the recorded extensions pointer.
*/
{
word32 idx = 0;
int sz = cert->extensionsSz;
byte* input = cert->extensions;
int length;
word32 oid;
byte critical = 0;
byte criticalFail = 0;
WOLFSSL_ENTER("DecodeCertExtensions");
if (input == NULL || sz == 0)
return BAD_FUNC_ARG;
if (input[idx++] != ASN_EXTENSIONS)
return ASN_PARSE_E;
if (GetLength(input, &idx, &length, sz) < 0)
return ASN_PARSE_E;
if (GetSequence(input, &idx, &length, sz) < 0)
return ASN_PARSE_E;
while (idx < (word32)sz) {
if (GetSequence(input, &idx, &length, sz) < 0) {
WOLFSSL_MSG("\tfail: should be a SEQUENCE");
return ASN_PARSE_E;
}
oid = 0;
if (GetObjectId(input, &idx, &oid, sz) < 0) {
WOLFSSL_MSG("\tfail: OBJECT ID");
return ASN_PARSE_E;
}
/* check for critical flag */
critical = 0;
if (input[idx] == ASN_BOOLEAN) {
int boolLength = 0;
idx++;
if (GetLength(input, &idx, &boolLength, sz) < 0) {
WOLFSSL_MSG("\tfail: critical boolean length");
return ASN_PARSE_E;
}
if (input[idx++])
critical = 1;
}
/* process the extension based on the OID */
if (input[idx++] != ASN_OCTET_STRING) {
WOLFSSL_MSG("\tfail: should be an OCTET STRING");
return ASN_PARSE_E;
}
if (GetLength(input, &idx, &length, sz) < 0) {
WOLFSSL_MSG("\tfail: extension data length");
return ASN_PARSE_E;
}
switch (oid) {
case BASIC_CA_OID:
#ifdef OPENSSL_EXTRA
cert->extBasicConstSet = 1;
cert->extBasicConstCrit = critical;
#endif
if (DecodeBasicCaConstraint(&input[idx], length, cert) < 0)
return ASN_PARSE_E;
break;
case CRL_DIST_OID:
if (DecodeCrlDist(&input[idx], length, cert) < 0)
return ASN_PARSE_E;
break;
case AUTH_INFO_OID:
if (DecodeAuthInfo(&input[idx], length, cert) < 0)
return ASN_PARSE_E;
break;
case ALT_NAMES_OID:
#ifdef OPENSSL_EXTRA
cert->extSubjAltNameSet = 1;
cert->extSubjAltNameCrit = critical;
#endif
if (DecodeAltNames(&input[idx], length, cert) < 0)
return ASN_PARSE_E;
break;
case AUTH_KEY_OID:
cert->extAuthKeyIdSet = 1;
#ifdef OPENSSL_EXTRA
cert->extAuthKeyIdCrit = critical;
#endif
if (DecodeAuthKeyId(&input[idx], length, cert) < 0)
return ASN_PARSE_E;
break;
case SUBJ_KEY_OID:
cert->extSubjKeyIdSet = 1;
#ifdef OPENSSL_EXTRA
cert->extSubjKeyIdCrit = critical;
#endif
if (DecodeSubjKeyId(&input[idx], length, cert) < 0)
return ASN_PARSE_E;
break;
case CERT_POLICY_OID:
WOLFSSL_MSG("Certificate Policy extension not supported yet.");
#ifdef WOLFSSL_SEP
#ifdef OPENSSL_EXTRA
cert->extCertPolicySet = 1;
cert->extCertPolicyCrit = critical;
#endif
if (DecodeCertPolicy(&input[idx], length, cert) < 0)
return ASN_PARSE_E;
#endif
break;
case KEY_USAGE_OID:
cert->extKeyUsageSet = 1;
#ifdef OPENSSL_EXTRA
cert->extKeyUsageCrit = critical;
#endif
if (DecodeKeyUsage(&input[idx], length, cert) < 0)
return ASN_PARSE_E;
break;
case EXT_KEY_USAGE_OID:
cert->extExtKeyUsageSet = 1;
#ifdef OPENSSL_EXTRA
cert->extExtKeyUsageCrit = critical;
#endif
if (DecodeExtKeyUsage(&input[idx], length, cert) < 0)
return ASN_PARSE_E;
break;
#ifndef IGNORE_NAME_CONSTRAINTS
case NAME_CONS_OID:
cert->extNameConstraintSet = 1;
#ifdef OPENSSL_EXTRA
cert->extNameConstraintCrit = critical;
#endif
if (DecodeNameConstraints(&input[idx], length, cert) < 0)
return ASN_PARSE_E;
break;
#endif /* IGNORE_NAME_CONSTRAINTS */
case INHIBIT_ANY_OID:
WOLFSSL_MSG("Inhibit anyPolicy extension not supported yet.");
break;
default:
/* While it is a failure to not support critical extensions,
* still parse the certificate ignoring the unsupported
* extention to allow caller to accept it with the verify
* callback. */
if (critical)
criticalFail = 1;
break;
}
idx += length;
}
return criticalFail ? ASN_CRIT_EXT_E : 0;
}
int ParseCert(DecodedCert* cert, int type, int verify, void* cm)
{
int ret;
char* ptr;
ret = ParseCertRelative(cert, type, verify, cm);
if (ret < 0)
return ret;
if (cert->subjectCNLen > 0) {
ptr = (char*) XMALLOC(cert->subjectCNLen + 1, cert->heap,
DYNAMIC_TYPE_SUBJECT_CN);
if (ptr == NULL)
return MEMORY_E;
XMEMCPY(ptr, cert->subjectCN, cert->subjectCNLen);
ptr[cert->subjectCNLen] = '\0';
cert->subjectCN = ptr;
cert->subjectCNStored = 1;
}
if (cert->keyOID == RSAk &&
cert->publicKey != NULL && cert->pubKeySize > 0) {
ptr = (char*) XMALLOC(cert->pubKeySize, cert->heap,
DYNAMIC_TYPE_PUBLIC_KEY);
if (ptr == NULL)
return MEMORY_E;
XMEMCPY(ptr, cert->publicKey, cert->pubKeySize);
cert->publicKey = (byte *)ptr;
cert->pubKeyStored = 1;
}
return ret;
}
/* from SSL proper, for locking can't do find here anymore */
#ifdef __cplusplus
extern "C" {
#endif
WOLFSSL_LOCAL Signer* GetCA(void* signers, byte* hash);
#ifndef NO_SKID
WOLFSSL_LOCAL Signer* GetCAByName(void* signers, byte* hash);
#endif
#ifdef __cplusplus
}
#endif
int ParseCertRelative(DecodedCert* cert, int type, int verify, void* cm)
{
word32 confirmOID;
int ret;
int badDate = 0;
int criticalExt = 0;
if ((ret = DecodeToKey(cert, verify)) < 0) {
if (ret == ASN_BEFORE_DATE_E || ret == ASN_AFTER_DATE_E)
badDate = ret;
else
return ret;
}
WOLFSSL_MSG("Parsed Past Key");
if (cert->srcIdx < cert->sigIndex) {
#ifndef ALLOW_V1_EXTENSIONS
if (cert->version < 2) {
WOLFSSL_MSG(" v1 and v2 certs not allowed extensions");
return ASN_VERSION_E;
}
#endif
/* save extensions */
cert->extensions = &cert->source[cert->srcIdx];
cert->extensionsSz = cert->sigIndex - cert->srcIdx;
cert->extensionsIdx = cert->srcIdx; /* for potential later use */
if ((ret = DecodeCertExtensions(cert)) < 0) {
if (ret == ASN_CRIT_EXT_E)
criticalExt = ret;
else
return ret;
}
/* advance past extensions */
cert->srcIdx = cert->sigIndex;
}
if ((ret = GetAlgoId(cert->source, &cert->srcIdx, &confirmOID,
cert->maxIdx)) < 0)
return ret;
if ((ret = GetSignature(cert)) < 0)
return ret;
if (confirmOID != cert->signatureOID)
return ASN_SIG_OID_E;
#ifndef NO_SKID
if (cert->extSubjKeyIdSet == 0
&& cert->publicKey != NULL && cert->pubKeySize > 0) {
#ifdef NO_SHA
ret = wc_Sha256Hash(cert->publicKey, cert->pubKeySize,
cert->extSubjKeyId);
#else
ret = wc_ShaHash(cert->publicKey, cert->pubKeySize,
cert->extSubjKeyId);
#endif
if (ret != 0)
return ret;
}
#endif
if (verify && type != CA_TYPE) {
Signer* ca = NULL;
#ifndef NO_SKID
if (cert->extAuthKeyIdSet)
ca = GetCA(cm, cert->extAuthKeyId);
if (ca == NULL)
ca = GetCAByName(cm, cert->issuerHash);
#else /* NO_SKID */
ca = GetCA(cm, cert->issuerHash);
#endif /* NO SKID */
WOLFSSL_MSG("About to verify certificate signature");
if (ca) {
#ifdef HAVE_OCSP
/* Need the ca's public key hash for OCSP */
#ifdef NO_SHA
ret = wc_Sha256Hash(ca->publicKey, ca->pubKeySize,
cert->issuerKeyHash);
#else /* NO_SHA */
ret = wc_ShaHash(ca->publicKey, ca->pubKeySize,
cert->issuerKeyHash);
#endif /* NO_SHA */
if (ret != 0)
return ret;
#endif /* HAVE_OCSP */
/* try to confirm/verify signature */
if (!ConfirmSignature(cert->source + cert->certBegin,
cert->sigIndex - cert->certBegin,
ca->publicKey, ca->pubKeySize, ca->keyOID,
cert->signature, cert->sigLength, cert->signatureOID,
cert->heap)) {
WOLFSSL_MSG("Confirm signature failed");
return ASN_SIG_CONFIRM_E;
}
#ifndef IGNORE_NAME_CONSTRAINTS
/* check that this cert's name is permitted by the signer's
* name constraints */
if (!ConfirmNameConstraints(ca, cert)) {
WOLFSSL_MSG("Confirm name constraint failed");
return ASN_NAME_INVALID_E;
}
#endif /* IGNORE_NAME_CONSTRAINTS */
}
else {
/* no signer */
WOLFSSL_MSG("No CA signer to verify with");
return ASN_NO_SIGNER_E;
}
}
if (badDate != 0)
return badDate;
if (criticalExt != 0)
return criticalExt;
return 0;
}
/* Create and init an new signer */
Signer* MakeSigner(void* heap)
{
Signer* signer = (Signer*) XMALLOC(sizeof(Signer), heap,
DYNAMIC_TYPE_SIGNER);
if (signer) {
signer->pubKeySize = 0;
signer->keyOID = 0;
signer->publicKey = NULL;
signer->nameLen = 0;
signer->name = NULL;
#ifndef IGNORE_NAME_CONSTRAINTS
signer->permittedNames = NULL;
signer->excludedNames = NULL;
#endif /* IGNORE_NAME_CONSTRAINTS */
signer->next = NULL;
}
(void)heap;
return signer;
}
/* Free an individual signer */
void FreeSigner(Signer* signer, void* heap)
{
XFREE(signer->name, heap, DYNAMIC_TYPE_SUBJECT_CN);
XFREE(signer->publicKey, heap, DYNAMIC_TYPE_PUBLIC_KEY);
#ifndef IGNORE_NAME_CONSTRAINTS
if (signer->permittedNames)
FreeNameSubtrees(signer->permittedNames, heap);
if (signer->excludedNames)
FreeNameSubtrees(signer->excludedNames, heap);
#endif
XFREE(signer, heap, DYNAMIC_TYPE_SIGNER);
(void)heap;
}
/* Free the whole singer table with number of rows */
void FreeSignerTable(Signer** table, int rows, void* heap)
{
int i;
for (i = 0; i < rows; i++) {
Signer* signer = table[i];
while (signer) {
Signer* next = signer->next;
FreeSigner(signer, heap);
signer = next;
}
table[i] = NULL;
}
}
WOLFSSL_LOCAL int SetMyVersion(word32 version, byte* output, int header)
{
int i = 0;
if (header) {
output[i++] = ASN_CONTEXT_SPECIFIC | ASN_CONSTRUCTED;
output[i++] = ASN_BIT_STRING;
}
output[i++] = ASN_INTEGER;
output[i++] = 0x01;
output[i++] = (byte)version;
return i;
}
WOLFSSL_LOCAL int SetSerialNumber(const byte* sn, word32 snSz, byte* output)
{
int result = 0;
WOLFSSL_ENTER("SetSerialNumber");
if (snSz <= EXTERNAL_SERIAL_SIZE) {
output[0] = ASN_INTEGER;
/* The serial number is always positive. When encoding the
* INTEGER, if the MSB is 1, add a padding zero to keep the
* number positive. */
if (sn[0] & 0x80) {
output[1] = (byte)snSz + 1;
output[2] = 0;
XMEMCPY(&output[3], sn, snSz);
result = snSz + 3;
}
else {
output[1] = (byte)snSz;
XMEMCPY(&output[2], sn, snSz);
result = snSz + 2;
}
}
return result;
}
#if defined(WOLFSSL_KEY_GEN) || defined(WOLFSSL_CERT_GEN)
/* convert der buffer to pem into output, can't do inplace, der and output
need to be different */
int wc_DerToPem(const byte* der, word32 derSz, byte* output, word32 outSz,
int type)
{
#ifdef WOLFSSL_SMALL_STACK
char* header = NULL;
char* footer = NULL;
#else
char header[80];
char footer[80];
#endif
int headerLen = 80;
int footerLen = 80;
int i;
int err;
int outLen; /* return length or error */
if (der == output) /* no in place conversion */
return BAD_FUNC_ARG;
#ifdef WOLFSSL_SMALL_STACK
header = (char*)XMALLOC(headerLen, NULL, DYNAMIC_TYPE_TMP_BUFFER);
if (header == NULL)
return MEMORY_E;
footer = (char*)XMALLOC(footerLen, NULL, DYNAMIC_TYPE_TMP_BUFFER);
if (footer == NULL) {
XFREE(header, NULL, DYNAMIC_TYPE_TMP_BUFFER);
return MEMORY_E;
}
#endif
if (type == CERT_TYPE) {
XSTRNCPY(header, "-----BEGIN CERTIFICATE-----\n", headerLen);
XSTRNCPY(footer, "-----END CERTIFICATE-----\n", footerLen);
}
else if (type == PRIVATEKEY_TYPE) {
XSTRNCPY(header, "-----BEGIN RSA PRIVATE KEY-----\n", headerLen);
XSTRNCPY(footer, "-----END RSA PRIVATE KEY-----\n", footerLen);
}
#ifdef HAVE_ECC
else if (type == ECC_PRIVATEKEY_TYPE) {
XSTRNCPY(header, "-----BEGIN EC PRIVATE KEY-----\n", headerLen);
XSTRNCPY(footer, "-----END EC PRIVATE KEY-----\n", footerLen);
}
#endif
#ifdef WOLFSSL_CERT_REQ
else if (type == CERTREQ_TYPE)
{
XSTRNCPY(header,
"-----BEGIN CERTIFICATE REQUEST-----\n", headerLen);
XSTRNCPY(footer, "-----END CERTIFICATE REQUEST-----\n", footerLen);
}
#endif
else {
#ifdef WOLFSSL_SMALL_STACK
XFREE(header, NULL, DYNAMIC_TYPE_TMP_BUFFER);
XFREE(footer, NULL, DYNAMIC_TYPE_TMP_BUFFER);
#endif
return BAD_FUNC_ARG;
}
headerLen = (int)XSTRLEN(header);
footerLen = (int)XSTRLEN(footer);
if (!der || !output) {
#ifdef WOLFSSL_SMALL_STACK
XFREE(header, NULL, DYNAMIC_TYPE_TMP_BUFFER);
XFREE(footer, NULL, DYNAMIC_TYPE_TMP_BUFFER);
#endif
return BAD_FUNC_ARG;
}
/* don't even try if outSz too short */
if (outSz < headerLen + footerLen + derSz) {
#ifdef WOLFSSL_SMALL_STACK
XFREE(header, NULL, DYNAMIC_TYPE_TMP_BUFFER);
XFREE(footer, NULL, DYNAMIC_TYPE_TMP_BUFFER);
#endif
return BAD_FUNC_ARG;
}
/* header */
XMEMCPY(output, header, headerLen);
i = headerLen;
#ifdef WOLFSSL_SMALL_STACK
XFREE(header, NULL, DYNAMIC_TYPE_TMP_BUFFER);
#endif
/* body */
outLen = outSz - (headerLen + footerLen); /* input to Base64_Encode */
if ( (err = Base64_Encode(der, derSz, output + i, (word32*)&outLen)) < 0) {
#ifdef WOLFSSL_SMALL_STACK
XFREE(footer, NULL, DYNAMIC_TYPE_TMP_BUFFER);
#endif
return err;
}
i += outLen;
/* footer */
if ( (i + footerLen) > (int)outSz) {
#ifdef WOLFSSL_SMALL_STACK
XFREE(footer, NULL, DYNAMIC_TYPE_TMP_BUFFER);
#endif
return BAD_FUNC_ARG;
}
XMEMCPY(output + i, footer, footerLen);
#ifdef WOLFSSL_SMALL_STACK
XFREE(footer, NULL, DYNAMIC_TYPE_TMP_BUFFER);
#endif
return outLen + headerLen + footerLen;
}
#endif /* WOLFSSL_KEY_GEN || WOLFSSL_CERT_GEN */
#if defined(WOLFSSL_KEY_GEN) && !defined(NO_RSA)
static mp_int* GetRsaInt(RsaKey* key, int idx)
{
if (idx == 0)
return &key->n;
if (idx == 1)
return &key->e;
if (idx == 2)
return &key->d;
if (idx == 3)
return &key->p;
if (idx == 4)
return &key->q;
if (idx == 5)
return &key->dP;
if (idx == 6)
return &key->dQ;
if (idx == 7)
return &key->u;
return NULL;
}
/* Release Tmp RSA resources */
static INLINE void FreeTmpRsas(byte** tmps, void* heap)
{
int i;
(void)heap;
for (i = 0; i < RSA_INTS; i++)
XFREE(tmps[i], heap, DYNAMIC_TYPE_RSA);
}
/* Convert RsaKey key to DER format, write to output (inLen), return bytes
written */
int wc_RsaKeyToDer(RsaKey* key, byte* output, word32 inLen)
{
word32 seqSz, verSz, rawLen, intTotalLen = 0;
word32 sizes[RSA_INTS];
int i, j, outLen, ret = 0;
byte seq[MAX_SEQ_SZ];
byte ver[MAX_VERSION_SZ];
byte* tmps[RSA_INTS];
if (!key || !output)
return BAD_FUNC_ARG;
if (key->type != RSA_PRIVATE)
return BAD_FUNC_ARG;
for (i = 0; i < RSA_INTS; i++)
tmps[i] = NULL;
/* write all big ints from key to DER tmps */
for (i = 0; i < RSA_INTS; i++) {
mp_int* keyInt = GetRsaInt(key, i);
rawLen = mp_unsigned_bin_size(keyInt);
tmps[i] = (byte*)XMALLOC(rawLen + MAX_SEQ_SZ, key->heap,
DYNAMIC_TYPE_RSA);
if (tmps[i] == NULL) {
ret = MEMORY_E;
break;
}
tmps[i][0] = ASN_INTEGER;
sizes[i] = SetLength(rawLen, tmps[i] + 1) + 1; /* int tag */
if (sizes[i] <= MAX_SEQ_SZ) {
int err = mp_to_unsigned_bin(keyInt, tmps[i] + sizes[i]);
if (err == MP_OKAY) {
sizes[i] += rawLen;
intTotalLen += sizes[i];
}
else {
ret = err;
break;
}
}
else {
ret = ASN_INPUT_E;
break;
}
}
if (ret != 0) {
FreeTmpRsas(tmps, key->heap);
return ret;
}
/* make headers */
verSz = SetMyVersion(0, ver, FALSE);
seqSz = SetSequence(verSz + intTotalLen, seq);
outLen = seqSz + verSz + intTotalLen;
if (outLen > (int)inLen)
return BAD_FUNC_ARG;
/* write to output */
XMEMCPY(output, seq, seqSz);
j = seqSz;
XMEMCPY(output + j, ver, verSz);
j += verSz;
for (i = 0; i < RSA_INTS; i++) {
XMEMCPY(output + j, tmps[i], sizes[i]);
j += sizes[i];
}
FreeTmpRsas(tmps, key->heap);
return outLen;
}
#endif /* WOLFSSL_KEY_GEN && !NO_RSA */
#if defined(WOLFSSL_CERT_GEN) && !defined(NO_RSA)
#ifndef WOLFSSL_HAVE_MIN
#define WOLFSSL_HAVE_MIN
static INLINE word32 min(word32 a, word32 b)
{
return a > b ? b : a;
}
#endif /* WOLFSSL_HAVE_MIN */
/* Initialize and Set Certficate defaults:
version = 3 (0x2)
serial = 0
sigType = SHA_WITH_RSA
issuer = blank
daysValid = 500
selfSigned = 1 (true) use subject as issuer
subject = blank
*/
void wc_InitCert(Cert* cert)
{
cert->version = 2; /* version 3 is hex 2 */
cert->sigType = CTC_SHAwRSA;
cert->daysValid = 500;
cert->selfSigned = 1;
cert->isCA = 0;
cert->bodySz = 0;
#ifdef WOLFSSL_ALT_NAMES
cert->altNamesSz = 0;
cert->beforeDateSz = 0;
cert->afterDateSz = 0;
#endif
cert->keyType = RSA_KEY;
XMEMSET(cert->serial, 0, CTC_SERIAL_SIZE);
cert->issuer.country[0] = '\0';
cert->issuer.countryEnc = CTC_PRINTABLE;
cert->issuer.state[0] = '\0';
cert->issuer.stateEnc = CTC_UTF8;
cert->issuer.locality[0] = '\0';
cert->issuer.localityEnc = CTC_UTF8;
cert->issuer.sur[0] = '\0';
cert->issuer.surEnc = CTC_UTF8;
cert->issuer.org[0] = '\0';
cert->issuer.orgEnc = CTC_UTF8;
cert->issuer.unit[0] = '\0';
cert->issuer.unitEnc = CTC_UTF8;
cert->issuer.commonName[0] = '\0';
cert->issuer.commonNameEnc = CTC_UTF8;
cert->issuer.email[0] = '\0';
cert->subject.country[0] = '\0';
cert->subject.countryEnc = CTC_PRINTABLE;
cert->subject.state[0] = '\0';
cert->subject.stateEnc = CTC_UTF8;
cert->subject.locality[0] = '\0';
cert->subject.localityEnc = CTC_UTF8;
cert->subject.sur[0] = '\0';
cert->subject.surEnc = CTC_UTF8;
cert->subject.org[0] = '\0';
cert->subject.orgEnc = CTC_UTF8;
cert->subject.unit[0] = '\0';
cert->subject.unitEnc = CTC_UTF8;
cert->subject.commonName[0] = '\0';
cert->subject.commonNameEnc = CTC_UTF8;
cert->subject.email[0] = '\0';
#ifdef WOLFSSL_CERT_REQ
cert->challengePw[0] ='\0';
#endif
}
/* DER encoded x509 Certificate */
typedef struct DerCert {
byte size[MAX_LENGTH_SZ]; /* length encoded */
byte version[MAX_VERSION_SZ]; /* version encoded */
byte serial[CTC_SERIAL_SIZE + MAX_LENGTH_SZ]; /* serial number encoded */
byte sigAlgo[MAX_ALGO_SZ]; /* signature algo encoded */
byte issuer[ASN_NAME_MAX]; /* issuer encoded */
byte subject[ASN_NAME_MAX]; /* subject encoded */
byte validity[MAX_DATE_SIZE*2 + MAX_SEQ_SZ*2]; /* before and after dates */
byte publicKey[MAX_PUBLIC_KEY_SZ]; /* rsa / ntru public key encoded */
byte ca[MAX_CA_SZ]; /* basic constraint CA true size */
byte extensions[MAX_EXTENSIONS_SZ]; /* all extensions */
#ifdef WOLFSSL_CERT_REQ
byte attrib[MAX_ATTRIB_SZ]; /* Cert req attributes encoded */
#endif
int sizeSz; /* encoded size length */
int versionSz; /* encoded version length */
int serialSz; /* encoded serial length */
int sigAlgoSz; /* enocded sig alog length */
int issuerSz; /* encoded issuer length */
int subjectSz; /* encoded subject length */
int validitySz; /* encoded validity length */
int publicKeySz; /* encoded public key length */
int caSz; /* encoded CA extension length */
int extensionsSz; /* encoded extensions total length */
int total; /* total encoded lengths */
#ifdef WOLFSSL_CERT_REQ
int attribSz;
#endif
} DerCert;
#ifdef WOLFSSL_CERT_REQ
/* Write a set header to output */
static word32 SetUTF8String(word32 len, byte* output)
{
output[0] = ASN_UTF8STRING;
return SetLength(len, output + 1) + 1;
}
#endif /* WOLFSSL_CERT_REQ */
/* Write a serial number to output */
static int SetSerial(const byte* serial, byte* output)
{
int length = 0;
output[length++] = ASN_INTEGER;
length += SetLength(CTC_SERIAL_SIZE, &output[length]);
XMEMCPY(&output[length], serial, CTC_SERIAL_SIZE);
return length + CTC_SERIAL_SIZE;
}
#ifdef HAVE_ECC
/* Write a public ECC key to output */
static int SetEccPublicKey(byte* output, ecc_key* key)
{
byte len[MAX_LENGTH_SZ + 1]; /* trailing 0 */
int algoSz;
int curveSz;
int lenSz;
int idx;
word32 pubSz = ECC_BUFSIZE;
#ifdef WOLFSSL_SMALL_STACK
byte* algo = NULL;
byte* curve = NULL;
byte* pub = NULL;
#else
byte algo[MAX_ALGO_SZ];
byte curve[MAX_ALGO_SZ];
byte pub[ECC_BUFSIZE];
#endif
#ifdef WOLFSSL_SMALL_STACK
pub = (byte*)XMALLOC(ECC_BUFSIZE, NULL, DYNAMIC_TYPE_TMP_BUFFER);
if (pub == NULL)
return MEMORY_E;
#endif
int ret = wc_ecc_export_x963(key, pub, &pubSz);
if (ret != 0) {
#ifdef WOLFSSL_SMALL_STACK
XFREE(pub, NULL, DYNAMIC_TYPE_TMP_BUFFER);
#endif
return ret;
}
#ifdef WOLFSSL_SMALL_STACK
curve = (byte*)XMALLOC(MAX_ALGO_SZ, NULL, DYNAMIC_TYPE_TMP_BUFFER);
if (curve == NULL) {
XFREE(pub, NULL, DYNAMIC_TYPE_TMP_BUFFER);
return MEMORY_E;
}
#endif
/* headers */
curveSz = SetCurve(key, curve);
if (curveSz <= 0) {
#ifdef WOLFSSL_SMALL_STACK
XFREE(curve, NULL, DYNAMIC_TYPE_TMP_BUFFER);
XFREE(pub, NULL, DYNAMIC_TYPE_TMP_BUFFER);
#endif
return curveSz;
}
#ifdef WOLFSSL_SMALL_STACK
algo = (byte*)XMALLOC(MAX_ALGO_SZ, NULL, DYNAMIC_TYPE_TMP_BUFFER);
if (algo == NULL) {
XFREE(curve, NULL, DYNAMIC_TYPE_TMP_BUFFER);
XFREE(pub, NULL, DYNAMIC_TYPE_TMP_BUFFER);
return MEMORY_E;
}
#endif
algoSz = SetAlgoID(ECDSAk, algo, keyType, curveSz);
lenSz = SetLength(pubSz + 1, len);
len[lenSz++] = 0; /* trailing 0 */
/* write */
idx = SetSequence(pubSz + curveSz + lenSz + 1 + algoSz, output);
/* 1 is for ASN_BIT_STRING */
/* algo */
XMEMCPY(output + idx, algo, algoSz);
idx += algoSz;
/* curve */
XMEMCPY(output + idx, curve, curveSz);
idx += curveSz;
/* bit string */
output[idx++] = ASN_BIT_STRING;
/* length */
XMEMCPY(output + idx, len, lenSz);
idx += lenSz;
/* pub */
XMEMCPY(output + idx, pub, pubSz);
idx += pubSz;
#ifdef WOLFSSL_SMALL_STACK
XFREE(algo, NULL, DYNAMIC_TYPE_TMP_BUFFER);
XFREE(curve, NULL, DYNAMIC_TYPE_TMP_BUFFER);
XFREE(pub, NULL, DYNAMIC_TYPE_TMP_BUFFER);
#endif
return idx;
}
#endif /* HAVE_ECC */
/* Write a public RSA key to output */
static int SetRsaPublicKey(byte* output, RsaKey* key)
{
#ifdef WOLFSSL_SMALL_STACK
byte* n = NULL;
byte* e = NULL;
byte* algo = NULL;
#else
byte n[MAX_RSA_INT_SZ];
byte e[MAX_RSA_E_SZ];
byte algo[MAX_ALGO_SZ];
#endif
byte seq[MAX_SEQ_SZ];
byte len[MAX_LENGTH_SZ + 1]; /* trailing 0 */
int nSz;
int eSz;
int algoSz;
int seqSz;
int lenSz;
int idx;
int rawLen;
int leadingBit;
int err;
/* n */
#ifdef WOLFSSL_SMALL_STACK
n = (byte*)XMALLOC(MAX_RSA_INT_SZ, NULL, DYNAMIC_TYPE_TMP_BUFFER);
if (n == NULL)
return MEMORY_E;
#endif
leadingBit = mp_leading_bit(&key->n);
rawLen = mp_unsigned_bin_size(&key->n) + leadingBit;
n[0] = ASN_INTEGER;
nSz = SetLength(rawLen, n + 1) + 1; /* int tag */
if ( (nSz + rawLen) < MAX_RSA_INT_SZ) {
if (leadingBit)
n[nSz] = 0;
err = mp_to_unsigned_bin(&key->n, n + nSz + leadingBit);
if (err == MP_OKAY)
nSz += rawLen;
else {
#ifdef WOLFSSL_SMALL_STACK
XFREE(n, NULL, DYNAMIC_TYPE_TMP_BUFFER);
#endif
return MP_TO_E;
}
}
else {
#ifdef WOLFSSL_SMALL_STACK
XFREE(n, NULL, DYNAMIC_TYPE_TMP_BUFFER);
#endif
return BUFFER_E;
}
/* e */
#ifdef WOLFSSL_SMALL_STACK
e = (byte*)XMALLOC(MAX_RSA_E_SZ, NULL, DYNAMIC_TYPE_TMP_BUFFER);
if (e == NULL) {
#ifdef WOLFSSL_SMALL_STACK
XFREE(n, NULL, DYNAMIC_TYPE_TMP_BUFFER);
#endif
return MEMORY_E;
}
#endif
leadingBit = mp_leading_bit(&key->e);
rawLen = mp_unsigned_bin_size(&key->e) + leadingBit;
e[0] = ASN_INTEGER;
eSz = SetLength(rawLen, e + 1) + 1; /* int tag */
if ( (eSz + rawLen) < MAX_RSA_E_SZ) {
if (leadingBit)
e[eSz] = 0;
err = mp_to_unsigned_bin(&key->e, e + eSz + leadingBit);
if (err == MP_OKAY)
eSz += rawLen;
else {
#ifdef WOLFSSL_SMALL_STACK
XFREE(n, NULL, DYNAMIC_TYPE_TMP_BUFFER);
XFREE(e, NULL, DYNAMIC_TYPE_TMP_BUFFER);
#endif
return MP_TO_E;
}
}
else {
#ifdef WOLFSSL_SMALL_STACK
XFREE(n, NULL, DYNAMIC_TYPE_TMP_BUFFER);
XFREE(e, NULL, DYNAMIC_TYPE_TMP_BUFFER);
#endif
return BUFFER_E;
}
#ifdef WOLFSSL_SMALL_STACK
algo = (byte*)XMALLOC(MAX_ALGO_SZ, NULL, DYNAMIC_TYPE_TMP_BUFFER);
if (algo == NULL) {
XFREE(n, NULL, DYNAMIC_TYPE_TMP_BUFFER);
XFREE(e, NULL, DYNAMIC_TYPE_TMP_BUFFER);
return MEMORY_E;
}
#endif
/* headers */
algoSz = SetAlgoID(RSAk, algo, keyType, 0);
seqSz = SetSequence(nSz + eSz, seq);
lenSz = SetLength(seqSz + nSz + eSz + 1, len);
len[lenSz++] = 0; /* trailing 0 */
/* write */
idx = SetSequence(nSz + eSz + seqSz + lenSz + 1 + algoSz, output);
/* 1 is for ASN_BIT_STRING */
/* algo */
XMEMCPY(output + idx, algo, algoSz);
idx += algoSz;
/* bit string */
output[idx++] = ASN_BIT_STRING;
/* length */
XMEMCPY(output + idx, len, lenSz);
idx += lenSz;
/* seq */
XMEMCPY(output + idx, seq, seqSz);
idx += seqSz;
/* n */
XMEMCPY(output + idx, n, nSz);
idx += nSz;
/* e */
XMEMCPY(output + idx, e, eSz);
idx += eSz;
#ifdef WOLFSSL_SMALL_STACK
XFREE(n, NULL, DYNAMIC_TYPE_TMP_BUFFER);
XFREE(e, NULL, DYNAMIC_TYPE_TMP_BUFFER);
XFREE(algo, NULL, DYNAMIC_TYPE_TMP_BUFFER);
#endif
return idx;
}
static INLINE byte itob(int number)
{
return (byte)number + 0x30;
}
/* write time to output, format */
static void SetTime(struct tm* date, byte* output)
{
int i = 0;
output[i++] = itob((date->tm_year % 10000) / 1000);
output[i++] = itob((date->tm_year % 1000) / 100);
output[i++] = itob((date->tm_year % 100) / 10);
output[i++] = itob( date->tm_year % 10);
output[i++] = itob(date->tm_mon / 10);
output[i++] = itob(date->tm_mon % 10);
output[i++] = itob(date->tm_mday / 10);
output[i++] = itob(date->tm_mday % 10);
output[i++] = itob(date->tm_hour / 10);
output[i++] = itob(date->tm_hour % 10);
output[i++] = itob(date->tm_min / 10);
output[i++] = itob(date->tm_min % 10);
output[i++] = itob(date->tm_sec / 10);
output[i++] = itob(date->tm_sec % 10);
output[i] = 'Z'; /* Zulu profile */
}
#ifdef WOLFSSL_ALT_NAMES
/* Copy Dates from cert, return bytes written */
static int CopyValidity(byte* output, Cert* cert)
{
int seqSz;
WOLFSSL_ENTER("CopyValidity");
/* headers and output */
seqSz = SetSequence(cert->beforeDateSz + cert->afterDateSz, output);
XMEMCPY(output + seqSz, cert->beforeDate, cert->beforeDateSz);
XMEMCPY(output + seqSz + cert->beforeDateSz, cert->afterDate,
cert->afterDateSz);
return seqSz + cert->beforeDateSz + cert->afterDateSz;
}
#endif
/* for systems where mktime() doesn't normalize fully */
static void RebuildTime(time_t* in, struct tm* out)
{
#ifdef FREESCALE_MQX
out = localtime_r(in, out);
#else
(void)in;
(void)out;
#endif
}
/* Set Date validity from now until now + daysValid */
static int SetValidity(byte* output, int daysValid)
{
byte before[MAX_DATE_SIZE];
byte after[MAX_DATE_SIZE];
int beforeSz;
int afterSz;
int seqSz;
time_t ticks;
time_t normalTime;
struct tm* now;
struct tm* tmpTime = NULL;
struct tm local;
#if defined(FREESCALE_MQX) || defined(TIME_OVERRIDES)
/* for use with gmtime_r */
struct tm tmpTimeStorage;
tmpTime = &tmpTimeStorage;
#else
(void)tmpTime;
#endif
ticks = XTIME(0);
now = XGMTIME(&ticks, tmpTime);
/* before now */
local = *now;
before[0] = ASN_GENERALIZED_TIME;
beforeSz = SetLength(ASN_GEN_TIME_SZ, before + 1) + 1; /* gen tag */
/* subtract 1 day for more compliance */
local.tm_mday -= 1;
normalTime = mktime(&local);
RebuildTime(&normalTime, &local);
/* adjust */
local.tm_year += 1900;
local.tm_mon += 1;
SetTime(&local, before + beforeSz);
beforeSz += ASN_GEN_TIME_SZ;
/* after now + daysValid */
local = *now;
after[0] = ASN_GENERALIZED_TIME;
afterSz = SetLength(ASN_GEN_TIME_SZ, after + 1) + 1; /* gen tag */
/* add daysValid */
local.tm_mday += daysValid;
normalTime = mktime(&local);
RebuildTime(&normalTime, &local);
/* adjust */
local.tm_year += 1900;
local.tm_mon += 1;
SetTime(&local, after + afterSz);
afterSz += ASN_GEN_TIME_SZ;
/* headers and output */
seqSz = SetSequence(beforeSz + afterSz, output);
XMEMCPY(output + seqSz, before, beforeSz);
XMEMCPY(output + seqSz + beforeSz, after, afterSz);
return seqSz + beforeSz + afterSz;
}
/* ASN Encoded Name field */
typedef struct EncodedName {
int nameLen; /* actual string value length */
int totalLen; /* total encoded length */
int type; /* type of name */
int used; /* are we actually using this one */
byte encoded[CTC_NAME_SIZE * 2]; /* encoding */
} EncodedName;
/* Get Which Name from index */
static const char* GetOneName(CertName* name, int idx)
{
switch (idx) {
case 0:
return name->country;
case 1:
return name->state;
case 2:
return name->locality;
case 3:
return name->sur;
case 4:
return name->org;
case 5:
return name->unit;
case 6:
return name->commonName;
case 7:
return name->email;
default:
return 0;
}
}
/* Get Which Name Encoding from index */
static char GetNameType(CertName* name, int idx)
{
switch (idx) {
case 0:
return name->countryEnc;
case 1:
return name->stateEnc;
case 2:
return name->localityEnc;
case 3:
return name->surEnc;
case 4:
return name->orgEnc;
case 5:
return name->unitEnc;
case 6:
return name->commonNameEnc;
default:
return 0;
}
}
/* Get ASN Name from index */
static byte GetNameId(int idx)
{
switch (idx) {
case 0:
return ASN_COUNTRY_NAME;
case 1:
return ASN_STATE_NAME;
case 2:
return ASN_LOCALITY_NAME;
case 3:
return ASN_SUR_NAME;
case 4:
return ASN_ORG_NAME;
case 5:
return ASN_ORGUNIT_NAME;
case 6:
return ASN_COMMON_NAME;
case 7:
/* email uses different id type */
return 0;
default:
return 0;
}
}
/* encode all extensions, return total bytes written */
static int SetExtensions(byte* output, const byte* ext, int extSz, int header)
{
byte sequence[MAX_SEQ_SZ];
byte len[MAX_LENGTH_SZ];
int sz = 0;
int seqSz = SetSequence(extSz, sequence);
if (header) {
int lenSz = SetLength(seqSz + extSz, len);
output[0] = ASN_EXTENSIONS; /* extensions id */
sz++;
XMEMCPY(&output[sz], len, lenSz); /* length */
sz += lenSz;
}
XMEMCPY(&output[sz], sequence, seqSz); /* sequence */
sz += seqSz;
XMEMCPY(&output[sz], ext, extSz); /* extensions */
sz += extSz;
return sz;
}
/* encode CA basic constraint true, return total bytes written */
static int SetCa(byte* output)
{
static const byte ca[] = { 0x30, 0x0c, 0x06, 0x03, 0x55, 0x1d, 0x13, 0x04,
0x05, 0x30, 0x03, 0x01, 0x01, 0xff };
XMEMCPY(output, ca, sizeof(ca));
return (int)sizeof(ca);
}
/* encode CertName into output, return total bytes written */
static int SetName(byte* output, CertName* name)
{
int totalBytes = 0, i, idx;
#ifdef WOLFSSL_SMALL_STACK
EncodedName* names = NULL;
#else
EncodedName names[NAME_ENTRIES];
#endif
#ifdef WOLFSSL_SMALL_STACK
names = (EncodedName*)XMALLOC(sizeof(EncodedName) * NAME_ENTRIES, NULL,
DYNAMIC_TYPE_TMP_BUFFER);
if (names == NULL)
return MEMORY_E;
#endif
for (i = 0; i < NAME_ENTRIES; i++) {
const char* nameStr = GetOneName(name, i);
if (nameStr) {
/* bottom up */
byte firstLen[MAX_LENGTH_SZ];
byte secondLen[MAX_LENGTH_SZ];
byte sequence[MAX_SEQ_SZ];
byte set[MAX_SET_SZ];
int email = i == (NAME_ENTRIES - 1) ? 1 : 0;
int strLen = (int)XSTRLEN(nameStr);
int thisLen = strLen;
int firstSz, secondSz, seqSz, setSz;
if (strLen == 0) { /* no user data for this item */
names[i].used = 0;
continue;
}
secondSz = SetLength(strLen, secondLen);
thisLen += secondSz;
if (email) {
thisLen += EMAIL_JOINT_LEN;
thisLen ++; /* id type */
firstSz = SetLength(EMAIL_JOINT_LEN, firstLen);
}
else {
thisLen++; /* str type */
thisLen++; /* id type */
thisLen += JOINT_LEN;
firstSz = SetLength(JOINT_LEN + 1, firstLen);
}
thisLen += firstSz;
thisLen++; /* object id */
seqSz = SetSequence(thisLen, sequence);
thisLen += seqSz;
setSz = SetSet(thisLen, set);
thisLen += setSz;
if (thisLen > (int)sizeof(names[i].encoded)) {
#ifdef WOLFSSL_SMALL_STACK
XFREE(names, NULL, DYNAMIC_TYPE_TMP_BUFFER);
#endif
return BUFFER_E;
}
/* store it */
idx = 0;
/* set */
XMEMCPY(names[i].encoded, set, setSz);
idx += setSz;
/* seq */
XMEMCPY(names[i].encoded + idx, sequence, seqSz);
idx += seqSz;
/* asn object id */
names[i].encoded[idx++] = ASN_OBJECT_ID;
/* first length */
XMEMCPY(names[i].encoded + idx, firstLen, firstSz);
idx += firstSz;
if (email) {
const byte EMAIL_OID[] = { 0x2a, 0x86, 0x48, 0x86, 0xf7, 0x0d,
0x01, 0x09, 0x01, 0x16 };
/* email joint id */
XMEMCPY(names[i].encoded + idx, EMAIL_OID, sizeof(EMAIL_OID));
idx += (int)sizeof(EMAIL_OID);
}
else {
/* joint id */
byte bType = GetNameId(i);
names[i].encoded[idx++] = 0x55;
names[i].encoded[idx++] = 0x04;
/* id type */
names[i].encoded[idx++] = bType;
/* str type */
names[i].encoded[idx++] = GetNameType(name, i);
}
/* second length */
XMEMCPY(names[i].encoded + idx, secondLen, secondSz);
idx += secondSz;
/* str value */
XMEMCPY(names[i].encoded + idx, nameStr, strLen);
idx += strLen;
totalBytes += idx;
names[i].totalLen = idx;
names[i].used = 1;
}
else
names[i].used = 0;
}
/* header */
idx = SetSequence(totalBytes, output);
totalBytes += idx;
if (totalBytes > ASN_NAME_MAX) {
#ifdef WOLFSSL_SMALL_STACK
XFREE(names, NULL, DYNAMIC_TYPE_TMP_BUFFER);
#endif
return BUFFER_E;
}
for (i = 0; i < NAME_ENTRIES; i++) {
if (names[i].used) {
XMEMCPY(output + idx, names[i].encoded, names[i].totalLen);
idx += names[i].totalLen;
}
}
#ifdef WOLFSSL_SMALL_STACK
XFREE(names, NULL, DYNAMIC_TYPE_TMP_BUFFER);
#endif
return totalBytes;
}
/* encode info from cert into DER encoded format */
static int EncodeCert(Cert* cert, DerCert* der, RsaKey* rsaKey, ecc_key* eccKey,
RNG* rng, const byte* ntruKey, word16 ntruSz)
{
int ret;
(void)eccKey;
(void)ntruKey;
(void)ntruSz;
/* init */
XMEMSET(der, 0, sizeof(DerCert));
/* version */
der->versionSz = SetMyVersion(cert->version, der->version, TRUE);
/* serial number */
ret = wc_RNG_GenerateBlock(rng, cert->serial, CTC_SERIAL_SIZE);
if (ret != 0)
return ret;
cert->serial[0] = 0x01; /* ensure positive */
der->serialSz = SetSerial(cert->serial, der->serial);
/* signature algo */
der->sigAlgoSz = SetAlgoID(cert->sigType, der->sigAlgo, sigType, 0);
if (der->sigAlgoSz == 0)
return ALGO_ID_E;
/* public key */
if (cert->keyType == RSA_KEY) {
if (rsaKey == NULL)
return PUBLIC_KEY_E;
der->publicKeySz = SetRsaPublicKey(der->publicKey, rsaKey);
if (der->publicKeySz <= 0)
return PUBLIC_KEY_E;
}
#ifdef HAVE_ECC
if (cert->keyType == ECC_KEY) {
if (eccKey == NULL)
return PUBLIC_KEY_E;
der->publicKeySz = SetEccPublicKey(der->publicKey, eccKey);
if (der->publicKeySz <= 0)
return PUBLIC_KEY_E;
}
#endif /* HAVE_ECC */
#ifdef HAVE_NTRU
if (cert->keyType == NTRU_KEY) {
word32 rc;
word16 encodedSz;
rc = ntru_crypto_ntru_encrypt_publicKey2SubjectPublicKeyInfo( ntruSz,
ntruKey, &encodedSz, NULL);
if (rc != NTRU_OK)
return PUBLIC_KEY_E;
if (encodedSz > MAX_PUBLIC_KEY_SZ)
return PUBLIC_KEY_E;
rc = ntru_crypto_ntru_encrypt_publicKey2SubjectPublicKeyInfo( ntruSz,
ntruKey, &encodedSz, der->publicKey);
if (rc != NTRU_OK)
return PUBLIC_KEY_E;
der->publicKeySz = encodedSz;
}
#endif /* HAVE_NTRU */
der->validitySz = 0;
#ifdef WOLFSSL_ALT_NAMES
/* date validity copy ? */
if (cert->beforeDateSz && cert->afterDateSz) {
der->validitySz = CopyValidity(der->validity, cert);
if (der->validitySz == 0)
return DATE_E;
}
#endif
/* date validity */
if (der->validitySz == 0) {
der->validitySz = SetValidity(der->validity, cert->daysValid);
if (der->validitySz == 0)
return DATE_E;
}
/* subject name */
der->subjectSz = SetName(der->subject, &cert->subject);
if (der->subjectSz == 0)
return SUBJECT_E;
/* issuer name */
der->issuerSz = SetName(der->issuer, cert->selfSigned ?
&cert->subject : &cert->issuer);
if (der->issuerSz == 0)
return ISSUER_E;
/* CA */
if (cert->isCA) {
der->caSz = SetCa(der->ca);
if (der->caSz == 0)
return CA_TRUE_E;
}
else
der->caSz = 0;
/* extensions, just CA now */
if (cert->isCA) {
der->extensionsSz = SetExtensions(der->extensions,
der->ca, der->caSz, TRUE);
if (der->extensionsSz == 0)
return EXTENSIONS_E;
}
else
der->extensionsSz = 0;
#ifdef WOLFSSL_ALT_NAMES
if (der->extensionsSz == 0 && cert->altNamesSz) {
der->extensionsSz = SetExtensions(der->extensions, cert->altNames,
cert->altNamesSz, TRUE);
if (der->extensionsSz == 0)
return EXTENSIONS_E;
}
#endif
der->total = der->versionSz + der->serialSz + der->sigAlgoSz +
der->publicKeySz + der->validitySz + der->subjectSz + der->issuerSz +
der->extensionsSz;
return 0;
}
/* write DER encoded cert to buffer, size already checked */
static int WriteCertBody(DerCert* der, byte* buffer)
{
int idx;
/* signed part header */
idx = SetSequence(der->total, buffer);
/* version */
XMEMCPY(buffer + idx, der->version, der->versionSz);
idx += der->versionSz;
/* serial */
XMEMCPY(buffer + idx, der->serial, der->serialSz);
idx += der->serialSz;
/* sig algo */
XMEMCPY(buffer + idx, der->sigAlgo, der->sigAlgoSz);
idx += der->sigAlgoSz;
/* issuer */
XMEMCPY(buffer + idx, der->issuer, der->issuerSz);
idx += der->issuerSz;
/* validity */
XMEMCPY(buffer + idx, der->validity, der->validitySz);
idx += der->validitySz;
/* subject */
XMEMCPY(buffer + idx, der->subject, der->subjectSz);
idx += der->subjectSz;
/* public key */
XMEMCPY(buffer + idx, der->publicKey, der->publicKeySz);
idx += der->publicKeySz;
if (der->extensionsSz) {
/* extensions */
XMEMCPY(buffer + idx, der->extensions, min(der->extensionsSz,
sizeof(der->extensions)));
idx += der->extensionsSz;
}
return idx;
}
/* Make RSA signature from buffer (sz), write to sig (sigSz) */
static int MakeSignature(const byte* buffer, int sz, byte* sig, int sigSz,
RsaKey* rsaKey, ecc_key* eccKey, RNG* rng,
int sigAlgoType)
{
int encSigSz, digestSz, typeH = 0, ret = 0;
byte digest[SHA256_DIGEST_SIZE]; /* max size */
#ifdef WOLFSSL_SMALL_STACK
byte* encSig;
#else
byte encSig[MAX_ENCODED_DIG_SZ + MAX_ALGO_SZ + MAX_SEQ_SZ];
#endif
(void)digest;
(void)digestSz;
(void)encSig;
(void)encSigSz;
(void)typeH;
(void)buffer;
(void)sz;
(void)sig;
(void)sigSz;
(void)rsaKey;
(void)eccKey;
(void)rng;
switch (sigAlgoType) {
#ifndef NO_MD5
case CTC_MD5wRSA:
if ((ret = wc_Md5Hash(buffer, sz, digest)) == 0) {
typeH = MD5h;
digestSz = MD5_DIGEST_SIZE;
}
break;
#endif
#ifndef NO_SHA
case CTC_SHAwRSA:
case CTC_SHAwECDSA:
if ((ret = wc_ShaHash(buffer, sz, digest)) == 0) {
typeH = SHAh;
digestSz = SHA_DIGEST_SIZE;
}
break;
#endif
#ifndef NO_SHA256
case CTC_SHA256wRSA:
case CTC_SHA256wECDSA:
if ((ret = wc_Sha256Hash(buffer, sz, digest)) == 0) {
typeH = SHA256h;
digestSz = SHA256_DIGEST_SIZE;
}
break;
#endif
default:
WOLFSSL_MSG("MakeSignautre called with unsupported type");
ret = ALGO_ID_E;
}
if (ret != 0)
return ret;
#ifdef WOLFSSL_SMALL_STACK
encSig = (byte*)XMALLOC(MAX_ENCODED_DIG_SZ + MAX_ALGO_SZ + MAX_SEQ_SZ,
NULL, DYNAMIC_TYPE_TMP_BUFFER);
if (encSig == NULL)
return MEMORY_E;
#endif
ret = ALGO_ID_E;
#ifndef NO_RSA
if (rsaKey) {
/* signature */
encSigSz = wc_EncodeSignature(encSig, digest, digestSz, typeH);
ret = wc_RsaSSL_Sign(encSig, encSigSz, sig, sigSz, rsaKey, rng);
}
#endif
#ifdef HAVE_ECC
if (!rsaKey && eccKey) {
word32 outSz = sigSz;
ret = wc_ecc_sign_hash(digest, digestSz, sig, &outSz, rng, eccKey);
if (ret == 0)
ret = outSz;
}
#endif
#ifdef WOLFSSL_SMALL_STACK
XFREE(encSig, NULL, DYNAMIC_TYPE_TMP_BUFFER);
#endif
return ret;
}
/* add signature to end of buffer, size of buffer assumed checked, return
new length */
static int AddSignature(byte* buffer, int bodySz, const byte* sig, int sigSz,
int sigAlgoType)
{
byte seq[MAX_SEQ_SZ];
int idx = bodySz, seqSz;
/* algo */
idx += SetAlgoID(sigAlgoType, buffer + idx, sigType, 0);
/* bit string */
buffer[idx++] = ASN_BIT_STRING;
/* length */
idx += SetLength(sigSz + 1, buffer + idx);
buffer[idx++] = 0; /* trailing 0 */
/* signature */
XMEMCPY(buffer + idx, sig, sigSz);
idx += sigSz;
/* make room for overall header */
seqSz = SetSequence(idx, seq);
XMEMMOVE(buffer + seqSz, buffer, idx);
XMEMCPY(buffer, seq, seqSz);
return idx + seqSz;
}
/* Make an x509 Certificate v3 any key type from cert input, write to buffer */
static int MakeAnyCert(Cert* cert, byte* derBuffer, word32 derSz,
RsaKey* rsaKey, ecc_key* eccKey, RNG* rng,
const byte* ntruKey, word16 ntruSz)
{
int ret;
#ifdef WOLFSSL_SMALL_STACK
DerCert* der;
#else
DerCert der[1];
#endif
cert->keyType = eccKey ? ECC_KEY : (rsaKey ? RSA_KEY : NTRU_KEY);
#ifdef WOLFSSL_SMALL_STACK
der = (DerCert*)XMALLOC(sizeof(DerCert), NULL, DYNAMIC_TYPE_TMP_BUFFER);
if (der == NULL)
return MEMORY_E;
#endif
ret = EncodeCert(cert, der, rsaKey, eccKey, rng, ntruKey, ntruSz);
if (ret == 0) {
if (der->total + MAX_SEQ_SZ * 2 > (int)derSz)
ret = BUFFER_E;
else
ret = cert->bodySz = WriteCertBody(der, derBuffer);
}
#ifdef WOLFSSL_SMALL_STACK
XFREE(der, NULL, DYNAMIC_TYPE_TMP_BUFFER);
#endif
return ret;
}
/* Make an x509 Certificate v3 RSA or ECC from cert input, write to buffer */
int wc_MakeCert(Cert* cert, byte* derBuffer, word32 derSz, RsaKey* rsaKey,
ecc_key* eccKey, RNG* rng)
{
return MakeAnyCert(cert, derBuffer, derSz, rsaKey, eccKey, rng, NULL, 0);
}
#ifdef HAVE_NTRU
int wc_MakeNtruCert(Cert* cert, byte* derBuffer, word32 derSz,
const byte* ntruKey, word16 keySz, RNG* rng)
{
return MakeAnyCert(cert, derBuffer, derSz, NULL, NULL, rng, ntruKey, keySz);
}
#endif /* HAVE_NTRU */
#ifdef WOLFSSL_CERT_REQ
static int SetReqAttrib(byte* output, char* pw, int extSz)
{
static const byte cpOid[] =
{ ASN_OBJECT_ID, 0x09, 0x2a, 0x86, 0x48, 0x86, 0xf7, 0x0d, 0x01,
0x09, 0x07 };
static const byte erOid[] =
{ ASN_OBJECT_ID, 0x09, 0x2a, 0x86, 0x48, 0x86, 0xf7, 0x0d, 0x01,
0x09, 0x0e };
int sz = 0; /* overall size */
int cpSz = 0; /* Challenge Password section size */
int cpSeqSz = 0;
int cpSetSz = 0;
int cpStrSz = 0;
int pwSz = 0;
int erSz = 0; /* Extension Request section size */
int erSeqSz = 0;
int erSetSz = 0;
byte cpSeq[MAX_SEQ_SZ];
byte cpSet[MAX_SET_SZ];
byte cpStr[MAX_PRSTR_SZ];
byte erSeq[MAX_SEQ_SZ];
byte erSet[MAX_SET_SZ];
output[0] = 0xa0;
sz++;
if (pw && pw[0]) {
pwSz = (int)XSTRLEN(pw);
cpStrSz = SetUTF8String(pwSz, cpStr);
cpSetSz = SetSet(cpStrSz + pwSz, cpSet);
cpSeqSz = SetSequence(sizeof(cpOid) + cpSetSz + cpStrSz + pwSz, cpSeq);
cpSz = cpSeqSz + sizeof(cpOid) + cpSetSz + cpStrSz + pwSz;
}
if (extSz) {
erSetSz = SetSet(extSz, erSet);
erSeqSz = SetSequence(erSetSz + sizeof(erOid) + extSz, erSeq);
erSz = extSz + erSetSz + erSeqSz + sizeof(erOid);
}
/* Put the pieces together. */
sz += SetLength(cpSz + erSz, &output[sz]);
if (cpSz) {
XMEMCPY(&output[sz], cpSeq, cpSeqSz);
sz += cpSeqSz;
XMEMCPY(&output[sz], cpOid, sizeof(cpOid));
sz += sizeof(cpOid);
XMEMCPY(&output[sz], cpSet, cpSetSz);
sz += cpSetSz;
XMEMCPY(&output[sz], cpStr, cpStrSz);
sz += cpStrSz;
XMEMCPY(&output[sz], pw, pwSz);
sz += pwSz;
}
if (erSz) {
XMEMCPY(&output[sz], erSeq, erSeqSz);
sz += erSeqSz;
XMEMCPY(&output[sz], erOid, sizeof(erOid));
sz += sizeof(erOid);
XMEMCPY(&output[sz], erSet, erSetSz);
sz += erSetSz;
/* The actual extension data will be tacked onto the output later. */
}
return sz;
}
/* encode info from cert into DER encoded format */
static int EncodeCertReq(Cert* cert, DerCert* der,
RsaKey* rsaKey, ecc_key* eccKey)
{
(void)eccKey;
/* init */
XMEMSET(der, 0, sizeof(DerCert));
/* version */
der->versionSz = SetMyVersion(cert->version, der->version, FALSE);
/* subject name */
der->subjectSz = SetName(der->subject, &cert->subject);
if (der->subjectSz == 0)
return SUBJECT_E;
/* public key */
if (cert->keyType == RSA_KEY) {
if (rsaKey == NULL)
return PUBLIC_KEY_E;
der->publicKeySz = SetRsaPublicKey(der->publicKey, rsaKey);
if (der->publicKeySz <= 0)
return PUBLIC_KEY_E;
}
#ifdef HAVE_ECC
if (cert->keyType == ECC_KEY) {
if (eccKey == NULL)
return PUBLIC_KEY_E;
der->publicKeySz = SetEccPublicKey(der->publicKey, eccKey);
if (der->publicKeySz <= 0)
return PUBLIC_KEY_E;
}
#endif /* HAVE_ECC */
/* CA */
if (cert->isCA) {
der->caSz = SetCa(der->ca);
if (der->caSz == 0)
return CA_TRUE_E;
}
else
der->caSz = 0;
/* extensions, just CA now */
if (cert->isCA) {
der->extensionsSz = SetExtensions(der->extensions,
der->ca, der->caSz, FALSE);
if (der->extensionsSz == 0)
return EXTENSIONS_E;
}
else
der->extensionsSz = 0;
der->attribSz = SetReqAttrib(der->attrib,
cert->challengePw, der->extensionsSz);
if (der->attribSz == 0)
return REQ_ATTRIBUTE_E;
der->total = der->versionSz + der->subjectSz + der->publicKeySz +
der->extensionsSz + der->attribSz;
return 0;
}
/* write DER encoded cert req to buffer, size already checked */
static int WriteCertReqBody(DerCert* der, byte* buffer)
{
int idx;
/* signed part header */
idx = SetSequence(der->total, buffer);
/* version */
XMEMCPY(buffer + idx, der->version, der->versionSz);
idx += der->versionSz;
/* subject */
XMEMCPY(buffer + idx, der->subject, der->subjectSz);
idx += der->subjectSz;
/* public key */
XMEMCPY(buffer + idx, der->publicKey, der->publicKeySz);
idx += der->publicKeySz;
/* attributes */
XMEMCPY(buffer + idx, der->attrib, der->attribSz);
idx += der->attribSz;
/* extensions */
if (der->extensionsSz) {
XMEMCPY(buffer + idx, der->extensions, min(der->extensionsSz,
sizeof(der->extensions)));
idx += der->extensionsSz;
}
return idx;
}
int wc_MakeCertReq(Cert* cert, byte* derBuffer, word32 derSz,
RsaKey* rsaKey, ecc_key* eccKey)
{
int ret;
#ifdef WOLFSSL_SMALL_STACK
DerCert* der;
#else
DerCert der[1];
#endif
cert->keyType = eccKey ? ECC_KEY : RSA_KEY;
#ifdef WOLFSSL_SMALL_STACK
der = (DerCert*)XMALLOC(sizeof(DerCert), NULL, DYNAMIC_TYPE_TMP_BUFFER);
if (der == NULL)
return MEMORY_E;
#endif
ret = EncodeCertReq(cert, der, rsaKey, eccKey);
if (ret == 0) {
if (der->total + MAX_SEQ_SZ * 2 > (int)derSz)
ret = BUFFER_E;
else
ret = cert->bodySz = WriteCertReqBody(der, derBuffer);
}
#ifdef WOLFSSL_SMALL_STACK
XFREE(der, NULL, DYNAMIC_TYPE_TMP_BUFFER);
#endif
return ret;
}
#endif /* WOLFSSL_CERT_REQ */
int wc_SignCert(int requestSz, int sType, byte* buffer, word32 buffSz,
RsaKey* rsaKey, ecc_key* eccKey, RNG* rng)
{
int sigSz;
#ifdef WOLFSSL_SMALL_STACK
byte* sig;
#else
byte sig[MAX_ENCODED_SIG_SZ];
#endif
if (requestSz < 0)
return requestSz;
#ifdef WOLFSSL_SMALL_STACK
sig = (byte*)XMALLOC(MAX_ENCODED_SIG_SZ, NULL, DYNAMIC_TYPE_TMP_BUFFER);
if (sig == NULL)
return MEMORY_E;
#endif
sigSz = MakeSignature(buffer, requestSz, sig, MAX_ENCODED_SIG_SZ, rsaKey,
eccKey, rng, sType);
if (sigSz >= 0) {
if (requestSz + MAX_SEQ_SZ * 2 + sigSz > (int)buffSz)
sigSz = BUFFER_E;
else
sigSz = AddSignature(buffer, requestSz, sig, sigSz, sType);
}
#ifdef WOLFSSL_SMALL_STACK
XFREE(sig, NULL, DYNAMIC_TYPE_TMP_BUFFER);
#endif
return sigSz;
}
int wc_MakeSelfCert(Cert* cert, byte* buffer, word32 buffSz, RsaKey* key, RNG* rng)
{
int ret = wc_MakeCert(cert, buffer, buffSz, key, NULL, rng);
if (ret < 0)
return ret;
return wc_SignCert(cert->bodySz, cert->sigType, buffer, buffSz, key, NULL,rng);
}
#ifdef WOLFSSL_ALT_NAMES
/* Set Alt Names from der cert, return 0 on success */
static int SetAltNamesFromCert(Cert* cert, const byte* der, int derSz)
{
int ret;
#ifdef WOLFSSL_SMALL_STACK
DecodedCert* decoded;
#else
DecodedCert decoded[1];
#endif
if (derSz < 0)
return derSz;
#ifdef WOLFSSL_SMALL_STACK
decoded = (DecodedCert*)XMALLOC(sizeof(DecodedCert), NULL,
DYNAMIC_TYPE_TMP_BUFFER);
if (decoded == NULL)
return MEMORY_E;
#endif
InitDecodedCert(decoded, (byte*)der, derSz, 0);
ret = ParseCertRelative(decoded, CA_TYPE, NO_VERIFY, 0);
if (ret < 0) {
WOLFSSL_MSG("ParseCertRelative error");
}
else if (decoded->extensions) {
byte b;
int length;
word32 maxExtensionsIdx;
decoded->srcIdx = decoded->extensionsIdx;
b = decoded->source[decoded->srcIdx++];
if (b != ASN_EXTENSIONS) {
ret = ASN_PARSE_E;
}
else if (GetLength(decoded->source, &decoded->srcIdx, &length,
decoded->maxIdx) < 0) {
ret = ASN_PARSE_E;
}
else if (GetSequence(decoded->source, &decoded->srcIdx, &length,
decoded->maxIdx) < 0) {
ret = ASN_PARSE_E;
}
else {
maxExtensionsIdx = decoded->srcIdx + length;
while (decoded->srcIdx < maxExtensionsIdx) {
word32 oid;
word32 startIdx = decoded->srcIdx;
word32 tmpIdx;
if (GetSequence(decoded->source, &decoded->srcIdx, &length,
decoded->maxIdx) < 0) {
ret = ASN_PARSE_E;
break;
}
tmpIdx = decoded->srcIdx;
decoded->srcIdx = startIdx;
if (GetAlgoId(decoded->source, &decoded->srcIdx, &oid,
decoded->maxIdx) < 0) {
ret = ASN_PARSE_E;
break;
}
if (oid == ALT_NAMES_OID) {
cert->altNamesSz = length + (tmpIdx - startIdx);
if (cert->altNamesSz < (int)sizeof(cert->altNames))
XMEMCPY(cert->altNames, &decoded->source[startIdx],
cert->altNamesSz);
else {
cert->altNamesSz = 0;
WOLFSSL_MSG("AltNames extensions too big");
ret = ALT_NAME_E;
break;
}
}
decoded->srcIdx = tmpIdx + length;
}
}
}
FreeDecodedCert(decoded);
#ifdef WOLFSSL_SMALL_STACK
XFREE(decoded, NULL, DYNAMIC_TYPE_TMP_BUFFER);
#endif
return ret < 0 ? ret : 0;
}
/* Set Dates from der cert, return 0 on success */
static int SetDatesFromCert(Cert* cert, const byte* der, int derSz)
{
int ret;
#ifdef WOLFSSL_SMALL_STACK
DecodedCert* decoded;
#else
DecodedCert decoded[1];
#endif
WOLFSSL_ENTER("SetDatesFromCert");
if (derSz < 0)
return derSz;
#ifdef WOLFSSL_SMALL_STACK
decoded = (DecodedCert*)XMALLOC(sizeof(DecodedCert), NULL,
DYNAMIC_TYPE_TMP_BUFFER);
if (decoded == NULL)
return MEMORY_E;
#endif
InitDecodedCert(decoded, (byte*)der, derSz, 0);
ret = ParseCertRelative(decoded, CA_TYPE, NO_VERIFY, 0);
if (ret < 0) {
WOLFSSL_MSG("ParseCertRelative error");
}
else if (decoded->beforeDate == NULL || decoded->afterDate == NULL) {
WOLFSSL_MSG("Couldn't extract dates");
ret = -1;
}
else if (decoded->beforeDateLen > MAX_DATE_SIZE ||
decoded->afterDateLen > MAX_DATE_SIZE) {
WOLFSSL_MSG("Bad date size");
ret = -1;
}
else {
XMEMCPY(cert->beforeDate, decoded->beforeDate, decoded->beforeDateLen);
XMEMCPY(cert->afterDate, decoded->afterDate, decoded->afterDateLen);
cert->beforeDateSz = decoded->beforeDateLen;
cert->afterDateSz = decoded->afterDateLen;
}
FreeDecodedCert(decoded);
#ifdef WOLFSSL_SMALL_STACK
XFREE(decoded, NULL, DYNAMIC_TYPE_TMP_BUFFER);
#endif
return ret < 0 ? ret : 0;
}
#endif /* WOLFSSL_ALT_NAMES && !NO_RSA */
/* Set cn name from der buffer, return 0 on success */
static int SetNameFromCert(CertName* cn, const byte* der, int derSz)
{
int ret, sz;
#ifdef WOLFSSL_SMALL_STACK
DecodedCert* decoded;
#else
DecodedCert decoded[1];
#endif
if (derSz < 0)
return derSz;
#ifdef WOLFSSL_SMALL_STACK
decoded = (DecodedCert*)XMALLOC(sizeof(DecodedCert), NULL,
DYNAMIC_TYPE_TMP_BUFFER);
if (decoded == NULL)
return MEMORY_E;
#endif
InitDecodedCert(decoded, (byte*)der, derSz, 0);
ret = ParseCertRelative(decoded, CA_TYPE, NO_VERIFY, 0);
if (ret < 0) {
WOLFSSL_MSG("ParseCertRelative error");
}
else {
if (decoded->subjectCN) {
sz = (decoded->subjectCNLen < CTC_NAME_SIZE) ? decoded->subjectCNLen
: CTC_NAME_SIZE - 1;
strncpy(cn->commonName, decoded->subjectCN, CTC_NAME_SIZE);
cn->commonName[sz] = 0;
cn->commonNameEnc = decoded->subjectCNEnc;
}
if (decoded->subjectC) {
sz = (decoded->subjectCLen < CTC_NAME_SIZE) ? decoded->subjectCLen
: CTC_NAME_SIZE - 1;
strncpy(cn->country, decoded->subjectC, CTC_NAME_SIZE);
cn->country[sz] = 0;
cn->countryEnc = decoded->subjectCEnc;
}
if (decoded->subjectST) {
sz = (decoded->subjectSTLen < CTC_NAME_SIZE) ? decoded->subjectSTLen
: CTC_NAME_SIZE - 1;
strncpy(cn->state, decoded->subjectST, CTC_NAME_SIZE);
cn->state[sz] = 0;
cn->stateEnc = decoded->subjectSTEnc;
}
if (decoded->subjectL) {
sz = (decoded->subjectLLen < CTC_NAME_SIZE) ? decoded->subjectLLen
: CTC_NAME_SIZE - 1;
strncpy(cn->locality, decoded->subjectL, CTC_NAME_SIZE);
cn->locality[sz] = 0;
cn->localityEnc = decoded->subjectLEnc;
}
if (decoded->subjectO) {
sz = (decoded->subjectOLen < CTC_NAME_SIZE) ? decoded->subjectOLen
: CTC_NAME_SIZE - 1;
strncpy(cn->org, decoded->subjectO, CTC_NAME_SIZE);
cn->org[sz] = 0;
cn->orgEnc = decoded->subjectOEnc;
}
if (decoded->subjectOU) {
sz = (decoded->subjectOULen < CTC_NAME_SIZE) ? decoded->subjectOULen
: CTC_NAME_SIZE - 1;
strncpy(cn->unit, decoded->subjectOU, CTC_NAME_SIZE);
cn->unit[sz] = 0;
cn->unitEnc = decoded->subjectOUEnc;
}
if (decoded->subjectSN) {
sz = (decoded->subjectSNLen < CTC_NAME_SIZE) ? decoded->subjectSNLen
: CTC_NAME_SIZE - 1;
strncpy(cn->sur, decoded->subjectSN, CTC_NAME_SIZE);
cn->sur[sz] = 0;
cn->surEnc = decoded->subjectSNEnc;
}
if (decoded->subjectEmail) {
sz = (decoded->subjectEmailLen < CTC_NAME_SIZE)
? decoded->subjectEmailLen : CTC_NAME_SIZE - 1;
strncpy(cn->email, decoded->subjectEmail, CTC_NAME_SIZE);
cn->email[sz] = 0;
}
}
FreeDecodedCert(decoded);
#ifdef WOLFSSL_SMALL_STACK
XFREE(decoded, NULL, DYNAMIC_TYPE_TMP_BUFFER);
#endif
return ret < 0 ? ret : 0;
}
#ifndef NO_FILESYSTEM
/* Set cert issuer from issuerFile in PEM */
int wc_SetIssuer(Cert* cert, const char* issuerFile)
{
int ret;
int derSz;
byte* der = (byte*)XMALLOC(EIGHTK_BUF, NULL, DYNAMIC_TYPE_CERT);
if (der == NULL) {
WOLFSSL_MSG("wc_SetIssuer OOF Problem");
return MEMORY_E;
}
derSz = wolfSSL_PemCertToDer(issuerFile, der, EIGHTK_BUF);
cert->selfSigned = 0;
ret = SetNameFromCert(&cert->issuer, der, derSz);
XFREE(der, NULL, DYNAMIC_TYPE_CERT);
return ret;
}
/* Set cert subject from subjectFile in PEM */
int wc_SetSubject(Cert* cert, const char* subjectFile)
{
int ret;
int derSz;
byte* der = (byte*)XMALLOC(EIGHTK_BUF, NULL, DYNAMIC_TYPE_CERT);
if (der == NULL) {
WOLFSSL_MSG("wc_SetSubject OOF Problem");
return MEMORY_E;
}
derSz = wolfSSL_PemCertToDer(subjectFile, der, EIGHTK_BUF);
ret = SetNameFromCert(&cert->subject, der, derSz);
XFREE(der, NULL, DYNAMIC_TYPE_CERT);
return ret;
}
#ifdef WOLFSSL_ALT_NAMES
/* Set atl names from file in PEM */
int wc_SetAltNames(Cert* cert, const char* file)
{
int ret;
int derSz;
byte* der = (byte*)XMALLOC(EIGHTK_BUF, NULL, DYNAMIC_TYPE_CERT);
if (der == NULL) {
WOLFSSL_MSG("wc_SetAltNames OOF Problem");
return MEMORY_E;
}
derSz = wolfSSL_PemCertToDer(file, der, EIGHTK_BUF);
ret = SetAltNamesFromCert(cert, der, derSz);
XFREE(der, NULL, DYNAMIC_TYPE_CERT);
return ret;
}
#endif /* WOLFSSL_ALT_NAMES */
#endif /* NO_FILESYSTEM */
/* Set cert issuer from DER buffer */
int wc_SetIssuerBuffer(Cert* cert, const byte* der, int derSz)
{
cert->selfSigned = 0;
return SetNameFromCert(&cert->issuer, der, derSz);
}
/* Set cert subject from DER buffer */
int wc_SetSubjectBuffer(Cert* cert, const byte* der, int derSz)
{
return SetNameFromCert(&cert->subject, der, derSz);
}
#ifdef WOLFSSL_ALT_NAMES
/* Set cert alt names from DER buffer */
int wc_SetAltNamesBuffer(Cert* cert, const byte* der, int derSz)
{
return SetAltNamesFromCert(cert, der, derSz);
}
/* Set cert dates from DER buffer */
int wc_SetDatesBuffer(Cert* cert, const byte* der, int derSz)
{
return SetDatesFromCert(cert, der, derSz);
}
#endif /* WOLFSSL_ALT_NAMES */
#endif /* WOLFSSL_CERT_GEN */
#ifdef HAVE_ECC
/* Der Encode r & s ints into out, outLen is (in/out) size */
int StoreECC_DSA_Sig(byte* out, word32* outLen, mp_int* r, mp_int* s)
{
word32 idx = 0;
word32 rSz; /* encoding size */
word32 sSz;
word32 headerSz = 4; /* 2*ASN_TAG + 2*LEN(ENUM) */
/* If the leading bit on the INTEGER is a 1, add a leading zero */
int rLeadingZero = mp_leading_bit(r);
int sLeadingZero = mp_leading_bit(s);
int rLen = mp_unsigned_bin_size(r); /* big int size */
int sLen = mp_unsigned_bin_size(s);
int err;
if (*outLen < (rLen + rLeadingZero + sLen + sLeadingZero +
headerSz + 2)) /* SEQ_TAG + LEN(ENUM) */
return BAD_FUNC_ARG;
idx = SetSequence(rLen+rLeadingZero+sLen+sLeadingZero+headerSz, out);
/* store r */
out[idx++] = ASN_INTEGER;
rSz = SetLength(rLen + rLeadingZero, &out[idx]);
idx += rSz;
if (rLeadingZero)
out[idx++] = 0;
err = mp_to_unsigned_bin(r, &out[idx]);
if (err != MP_OKAY) return err;
idx += rLen;
/* store s */
out[idx++] = ASN_INTEGER;
sSz = SetLength(sLen + sLeadingZero, &out[idx]);
idx += sSz;
if (sLeadingZero)
out[idx++] = 0;
err = mp_to_unsigned_bin(s, &out[idx]);
if (err != MP_OKAY) return err;
idx += sLen;
*outLen = idx;
return 0;
}
/* Der Decode ECC-DSA Signautre, r & s stored as big ints */
int DecodeECC_DSA_Sig(const byte* sig, word32 sigLen, mp_int* r, mp_int* s)
{
word32 idx = 0;
int len = 0;
if (GetSequence(sig, &idx, &len, sigLen) < 0)
return ASN_ECC_KEY_E;
if ((word32)len > (sigLen - idx))
return ASN_ECC_KEY_E;
if (GetInt(r, sig, &idx, sigLen) < 0)
return ASN_ECC_KEY_E;
if (GetInt(s, sig, &idx, sigLen) < 0)
return ASN_ECC_KEY_E;
return 0;
}
int wc_EccPrivateKeyDecode(const byte* input, word32* inOutIdx, ecc_key* key,
word32 inSz)
{
word32 oid = 0;
int version, length;
int privSz, pubSz;
byte b;
int ret = 0;
#ifdef WOLFSSL_SMALL_STACK
byte* priv;
byte* pub;
#else
byte priv[ECC_MAXSIZE];
byte pub[ECC_MAXSIZE * 2 + 1]; /* public key has two parts plus header */
#endif
if (input == NULL || inOutIdx == NULL || key == NULL || inSz == 0)
return BAD_FUNC_ARG;
if (GetSequence(input, inOutIdx, &length, inSz) < 0)
return ASN_PARSE_E;
if (GetMyVersion(input, inOutIdx, &version) < 0)
return ASN_PARSE_E;
b = input[*inOutIdx];
*inOutIdx += 1;
/* priv type */
if (b != 4 && b != 6 && b != 7)
return ASN_PARSE_E;
if (GetLength(input, inOutIdx, &length, inSz) < 0)
return ASN_PARSE_E;
if (length > ECC_MAXSIZE)
return BUFFER_E;
#ifdef WOLFSSL_SMALL_STACK
priv = (byte*)XMALLOC(ECC_MAXSIZE, NULL, DYNAMIC_TYPE_TMP_BUFFER);
if (priv == NULL)
return MEMORY_E;
pub = (byte*)XMALLOC(ECC_MAXSIZE * 2 + 1, NULL, DYNAMIC_TYPE_TMP_BUFFER);
if (pub == NULL) {
XFREE(priv, NULL, DYNAMIC_TYPE_TMP_BUFFER);
return MEMORY_E;
}
#endif
/* priv key */
privSz = length;
XMEMCPY(priv, &input[*inOutIdx], privSz);
*inOutIdx += length;
/* prefix 0, may have */
b = input[*inOutIdx];
if (b == ECC_PREFIX_0) {
*inOutIdx += 1;
if (GetLength(input, inOutIdx, &length, inSz) < 0)
ret = ASN_PARSE_E;
else {
/* object id */
b = input[*inOutIdx];
*inOutIdx += 1;
if (b != ASN_OBJECT_ID) {
ret = ASN_OBJECT_ID_E;
}
else if (GetLength(input, inOutIdx, &length, inSz) < 0) {
ret = ASN_PARSE_E;
}
else {
while(length--) {
oid += input[*inOutIdx];
*inOutIdx += 1;
}
if (CheckCurve(oid) < 0)
ret = ECC_CURVE_OID_E;
}
}
}
if (ret == 0) {
/* prefix 1 */
b = input[*inOutIdx];
*inOutIdx += 1;
if (b != ECC_PREFIX_1) {
ret = ASN_ECC_KEY_E;
}
else if (GetLength(input, inOutIdx, &length, inSz) < 0) {
ret = ASN_PARSE_E;
}
else {
/* key header */
b = input[*inOutIdx];
*inOutIdx += 1;
if (b != ASN_BIT_STRING) {
ret = ASN_BITSTR_E;
}
else if (GetLength(input, inOutIdx, &length, inSz) < 0) {
ret = ASN_PARSE_E;
}
else {
b = input[*inOutIdx];
*inOutIdx += 1;
if (b != 0x00) {
ret = ASN_EXPECT_0_E;
}
else {
/* pub key */
pubSz = length - 1; /* null prefix */
if (pubSz < (ECC_MAXSIZE*2 + 1)) {
XMEMCPY(pub, &input[*inOutIdx], pubSz);
*inOutIdx += length;
ret = wc_ecc_import_private_key(priv, privSz, pub, pubSz,
key);
} else
ret = BUFFER_E;
}
}
}
}
#ifdef WOLFSSL_SMALL_STACK
XFREE(priv, NULL, DYNAMIC_TYPE_TMP_BUFFER);
XFREE(pub, NULL, DYNAMIC_TYPE_TMP_BUFFER);
#endif
return ret;
}
#ifdef WOLFSSL_KEY_GEN
/* Write a Private ecc key to DER format, length on success else < 0 */
int wc_EccKeyToDer(ecc_key* key, byte* output, word32 inLen)
{
byte curve[MAX_ALGO_SZ];
byte ver[MAX_VERSION_SZ];
byte seq[MAX_SEQ_SZ];
int ret;
int curveSz;
int verSz;
int privHdrSz = ASN_ECC_HEADER_SZ;
int pubHdrSz = ASN_ECC_CONTEXT_SZ + ASN_ECC_HEADER_SZ;
int curveHdrSz = ASN_ECC_CONTEXT_SZ;
word32 seqSz;
word32 idx = 0;
word32 pubSz = ECC_BUFSIZE;
word32 privSz;
word32 totalSz;
if (key == NULL || output == NULL || inLen == 0)
return BAD_FUNC_ARG;
ret = wc_ecc_export_x963(key, NULL, &pubSz);
if (ret != LENGTH_ONLY_E) {
return ret;
}
curveSz = SetCurve(key, curve);
if (curveSz < 0) {
return curveSz;
}
privSz = key->dp->size;
verSz = SetMyVersion(1, ver, FALSE);
if (verSz < 0) {
return verSz;
}
totalSz = verSz + privSz + privHdrSz + curveSz + curveHdrSz +
pubSz + pubHdrSz + 1; /* plus null byte b4 public */
seqSz = SetSequence(totalSz, seq);
totalSz += seqSz;
if (totalSz > inLen) {
return BUFFER_E;
}
/* write it out */
/* seq */
XMEMCPY(output + idx, seq, seqSz);
idx += seqSz;
/* ver */
XMEMCPY(output + idx, ver, verSz);
idx += verSz;
/* private */
output[idx++] = ASN_OCTET_STRING;
output[idx++] = (byte)privSz;
ret = wc_ecc_export_private_only(key, output + idx, &privSz);
if (ret < 0) {
return ret;
}
idx += privSz;
/* curve */
output[idx++] = ECC_PREFIX_0;
output[idx++] = (byte)curveSz;
XMEMCPY(output + idx, curve, curveSz);
idx += curveSz;
/* public */
output[idx++] = ECC_PREFIX_1;
output[idx++] = (byte)pubSz + ASN_ECC_CONTEXT_SZ + 1; /* plus null byte */
output[idx++] = ASN_BIT_STRING;
output[idx++] = (byte)pubSz + 1; /* plus null byte */
output[idx++] = (byte)0; /* null byte */
ret = wc_ecc_export_x963(key, output + idx, &pubSz);
if (ret != 0) {
return ret;
}
/* idx += pubSz if do more later */
return totalSz;
}
#endif /* WOLFSSL_KEY_GEN */
#endif /* HAVE_ECC */
#if defined(HAVE_OCSP) || defined(HAVE_CRL)
/* Get raw Date only, no processing, 0 on success */
static int GetBasicDate(const byte* source, word32* idx, byte* date,
byte* format, int maxIdx)
{
int length;
WOLFSSL_ENTER("GetBasicDate");
*format = source[*idx];
*idx += 1;
if (*format != ASN_UTC_TIME && *format != ASN_GENERALIZED_TIME)
return ASN_TIME_E;
if (GetLength(source, idx, &length, maxIdx) < 0)
return ASN_PARSE_E;
if (length > MAX_DATE_SIZE || length < MIN_DATE_SIZE)
return ASN_DATE_SZ_E;
XMEMCPY(date, &source[*idx], length);
*idx += length;
return 0;
}
#endif
#ifdef HAVE_OCSP
static int GetEnumerated(const byte* input, word32* inOutIdx, int *value)
{
word32 idx = *inOutIdx;
word32 len;
WOLFSSL_ENTER("GetEnumerated");
*value = 0;
if (input[idx++] != ASN_ENUMERATED)
return ASN_PARSE_E;
len = input[idx++];
if (len > 4)
return ASN_PARSE_E;
while (len--) {
*value = *value << 8 | input[idx++];
}
*inOutIdx = idx;
return *value;
}
static int DecodeSingleResponse(byte* source,
word32* ioIndex, OcspResponse* resp, word32 size)
{
word32 idx = *ioIndex, prevIndex, oid;
int length, wrapperSz;
CertStatus* cs = resp->status;
WOLFSSL_ENTER("DecodeSingleResponse");
/* Outer wrapper of the SEQUENCE OF Single Responses. */
if (GetSequence(source, &idx, &wrapperSz, size) < 0)
return ASN_PARSE_E;
prevIndex = idx;
/* When making a request, we only request one status on one certificate
* at a time. There should only be one SingleResponse */
/* Wrapper around the Single Response */
if (GetSequence(source, &idx, &length, size) < 0)
return ASN_PARSE_E;
/* Wrapper around the CertID */
if (GetSequence(source, &idx, &length, size) < 0)
return ASN_PARSE_E;
/* Skip the hash algorithm */
if (GetAlgoId(source, &idx, &oid, size) < 0)
return ASN_PARSE_E;
/* Save reference to the hash of CN */
if (source[idx++] != ASN_OCTET_STRING)
return ASN_PARSE_E;
if (GetLength(source, &idx, &length, size) < 0)
return ASN_PARSE_E;
resp->issuerHash = source + idx;
idx += length;
/* Save reference to the hash of the issuer public key */
if (source[idx++] != ASN_OCTET_STRING)
return ASN_PARSE_E;
if (GetLength(source, &idx, &length, size) < 0)
return ASN_PARSE_E;
resp->issuerKeyHash = source + idx;
idx += length;
/* Read the serial number, it is handled as a string, not as a
* proper number. Just XMEMCPY the data over, rather than load it
* as an mp_int. */
if (source[idx++] != ASN_INTEGER)
return ASN_PARSE_E;
if (GetLength(source, &idx, &length, size) < 0)
return ASN_PARSE_E;
if (length <= EXTERNAL_SERIAL_SIZE)
{
if (source[idx] == 0)
{
idx++;
length--;
}
XMEMCPY(cs->serial, source + idx, length);
cs->serialSz = length;
}
else
{
return ASN_GETINT_E;
}
idx += length;
/* CertStatus */
switch (source[idx++])
{
case (ASN_CONTEXT_SPECIFIC | CERT_GOOD):
cs->status = CERT_GOOD;
idx++;
break;
case (ASN_CONTEXT_SPECIFIC | ASN_CONSTRUCTED | CERT_REVOKED):
cs->status = CERT_REVOKED;
if (GetLength(source, &idx, &length, size) < 0)
return ASN_PARSE_E;
idx += length;
break;
case (ASN_CONTEXT_SPECIFIC | CERT_UNKNOWN):
cs->status = CERT_UNKNOWN;
idx++;
break;
default:
return ASN_PARSE_E;
}
if (GetBasicDate(source, &idx, cs->thisDate,
&cs->thisDateFormat, size) < 0)
return ASN_PARSE_E;
if (!XVALIDATE_DATE(cs->thisDate, cs->thisDateFormat, BEFORE))
return ASN_BEFORE_DATE_E;
/* The following items are optional. Only check for them if there is more
* unprocessed data in the singleResponse wrapper. */
if (((int)(idx - prevIndex) < wrapperSz) &&
(source[idx] == (ASN_CONSTRUCTED | ASN_CONTEXT_SPECIFIC | 0)))
{
idx++;
if (GetLength(source, &idx, &length, size) < 0)
return ASN_PARSE_E;
if (GetBasicDate(source, &idx, cs->nextDate,
&cs->nextDateFormat, size) < 0)
return ASN_PARSE_E;
}
if (((int)(idx - prevIndex) < wrapperSz) &&
(source[idx] == (ASN_CONSTRUCTED | ASN_CONTEXT_SPECIFIC | 1)))
{
idx++;
if (GetLength(source, &idx, &length, size) < 0)
return ASN_PARSE_E;
idx += length;
}
*ioIndex = idx;
return 0;
}
static int DecodeOcspRespExtensions(byte* source,
word32* ioIndex, OcspResponse* resp, word32 sz)
{
word32 idx = *ioIndex;
int length;
int ext_bound; /* boundary index for the sequence of extensions */
word32 oid;
WOLFSSL_ENTER("DecodeOcspRespExtensions");
if (source[idx++] != (ASN_CONSTRUCTED | ASN_CONTEXT_SPECIFIC | 1))
return ASN_PARSE_E;
if (GetLength(source, &idx, &length, sz) < 0) return ASN_PARSE_E;
if (GetSequence(source, &idx, &length, sz) < 0) return ASN_PARSE_E;
ext_bound = idx + length;
while (idx < (word32)ext_bound) {
if (GetSequence(source, &idx, &length, sz) < 0) {
WOLFSSL_MSG("\tfail: should be a SEQUENCE");
return ASN_PARSE_E;
}
oid = 0;
if (GetObjectId(source, &idx, &oid, sz) < 0) {
WOLFSSL_MSG("\tfail: OBJECT ID");
return ASN_PARSE_E;
}
/* check for critical flag */
if (source[idx] == ASN_BOOLEAN) {
WOLFSSL_MSG("\tfound optional critical flag, moving past");
idx += (ASN_BOOL_SIZE + 1);
}
/* process the extension based on the OID */
if (source[idx++] != ASN_OCTET_STRING) {
WOLFSSL_MSG("\tfail: should be an OCTET STRING");
return ASN_PARSE_E;
}
if (GetLength(source, &idx, &length, sz) < 0) {
WOLFSSL_MSG("\tfail: extension data length");
return ASN_PARSE_E;
}
if (oid == OCSP_NONCE_OID) {
resp->nonce = source + idx;
resp->nonceSz = length;
}
idx += length;
}
*ioIndex = idx;
return 0;
}
static int DecodeResponseData(byte* source,
word32* ioIndex, OcspResponse* resp, word32 size)
{
word32 idx = *ioIndex, prev_idx;
int length;
int version;
word32 responderId = 0;
WOLFSSL_ENTER("DecodeResponseData");
resp->response = source + idx;
prev_idx = idx;
if (GetSequence(source, &idx, &length, size) < 0)
return ASN_PARSE_E;
resp->responseSz = length + idx - prev_idx;
/* Get version. It is an EXPLICIT[0] DEFAULT(0) value. If this
* item isn't an EXPLICIT[0], then set version to zero and move
* onto the next item.
*/
if (source[idx] == (ASN_CONTEXT_SPECIFIC | ASN_CONSTRUCTED))
{
idx += 2; /* Eat the value and length */
if (GetMyVersion(source, &idx, &version) < 0)
return ASN_PARSE_E;
} else
version = 0;
responderId = source[idx++];
if ((responderId == (ASN_CONTEXT_SPECIFIC | ASN_CONSTRUCTED | 1)) ||
(responderId == (ASN_CONTEXT_SPECIFIC | ASN_CONSTRUCTED | 2)))
{
if (GetLength(source, &idx, &length, size) < 0)
return ASN_PARSE_E;
idx += length;
}
else
return ASN_PARSE_E;
/* save pointer to the producedAt time */
if (GetBasicDate(source, &idx, resp->producedDate,
&resp->producedDateFormat, size) < 0)
return ASN_PARSE_E;
if (DecodeSingleResponse(source, &idx, resp, size) < 0)
return ASN_PARSE_E;
if (DecodeOcspRespExtensions(source, &idx, resp, size) < 0)
return ASN_PARSE_E;
*ioIndex = idx;
return 0;
}
static int DecodeCerts(byte* source,
word32* ioIndex, OcspResponse* resp, word32 size)
{
word32 idx = *ioIndex;
WOLFSSL_ENTER("DecodeCerts");
if (source[idx++] == (ASN_CONSTRUCTED | ASN_CONTEXT_SPECIFIC))
{
int length;
if (GetLength(source, &idx, &length, size) < 0)
return ASN_PARSE_E;
if (GetSequence(source, &idx, &length, size) < 0)
return ASN_PARSE_E;
resp->cert = source + idx;
resp->certSz = length;
idx += length;
}
*ioIndex = idx;
return 0;
}
static int DecodeBasicOcspResponse(byte* source,
word32* ioIndex, OcspResponse* resp, word32 size)
{
int length;
word32 idx = *ioIndex;
word32 end_index;
WOLFSSL_ENTER("DecodeBasicOcspResponse");
if (GetSequence(source, &idx, &length, size) < 0)
return ASN_PARSE_E;
if (idx + length > size)
return ASN_INPUT_E;
end_index = idx + length;
if (DecodeResponseData(source, &idx, resp, size) < 0)
return ASN_PARSE_E;
/* Get the signature algorithm */
if (GetAlgoId(source, &idx, &resp->sigOID, size) < 0)
return ASN_PARSE_E;
/* Obtain pointer to the start of the signature, and save the size */
if (source[idx++] == ASN_BIT_STRING)
{
int sigLength = 0;
if (GetLength(source, &idx, &sigLength, size) < 0)
return ASN_PARSE_E;
resp->sigSz = sigLength;
resp->sig = source + idx;
idx += sigLength;
}
/*
* Check the length of the BasicOcspResponse against the current index to
* see if there are certificates, they are optional.
*/
if (idx < end_index)
{
DecodedCert cert;
int ret;
if (DecodeCerts(source, &idx, resp, size) < 0)
return ASN_PARSE_E;
InitDecodedCert(&cert, resp->cert, resp->certSz, 0);
ret = ParseCertRelative(&cert, CA_TYPE, NO_VERIFY, 0);
if (ret < 0)
return ret;
ret = ConfirmSignature(resp->response, resp->responseSz,
cert.publicKey, cert.pubKeySize, cert.keyOID,
resp->sig, resp->sigSz, resp->sigOID, NULL);
FreeDecodedCert(&cert);
if (ret == 0)
{
WOLFSSL_MSG("\tOCSP Confirm signature failed");
return ASN_OCSP_CONFIRM_E;
}
}
*ioIndex = idx;
return 0;
}
void InitOcspResponse(OcspResponse* resp, CertStatus* status,
byte* source, word32 inSz)
{
WOLFSSL_ENTER("InitOcspResponse");
resp->responseStatus = -1;
resp->response = NULL;
resp->responseSz = 0;
resp->producedDateFormat = 0;
resp->issuerHash = NULL;
resp->issuerKeyHash = NULL;
resp->sig = NULL;
resp->sigSz = 0;
resp->sigOID = 0;
resp->status = status;
resp->nonce = NULL;
resp->nonceSz = 0;
resp->source = source;
resp->maxIdx = inSz;
}
int OcspResponseDecode(OcspResponse* resp)
{
int length = 0;
word32 idx = 0;
byte* source = resp->source;
word32 size = resp->maxIdx;
word32 oid;
WOLFSSL_ENTER("OcspResponseDecode");
/* peel the outer SEQUENCE wrapper */
if (GetSequence(source, &idx, &length, size) < 0)
return ASN_PARSE_E;
/* First get the responseStatus, an ENUMERATED */
if (GetEnumerated(source, &idx, &resp->responseStatus) < 0)
return ASN_PARSE_E;
if (resp->responseStatus != OCSP_SUCCESSFUL)
return 0;
/* Next is an EXPLICIT record called ResponseBytes, OPTIONAL */
if (idx >= size)
return ASN_INPUT_E;
if (source[idx++] != (ASN_CONSTRUCTED | ASN_CONTEXT_SPECIFIC))
return ASN_PARSE_E;
if (GetLength(source, &idx, &length, size) < 0)
return ASN_PARSE_E;
/* Get the responseBytes SEQUENCE */
if (GetSequence(source, &idx, &length, size) < 0)
return ASN_PARSE_E;
/* Check ObjectID for the resposeBytes */
if (GetObjectId(source, &idx, &oid, size) < 0)
return ASN_PARSE_E;
if (oid != OCSP_BASIC_OID)
return ASN_PARSE_E;
if (source[idx++] != ASN_OCTET_STRING)
return ASN_PARSE_E;
if (GetLength(source, &idx, &length, size) < 0)
return ASN_PARSE_E;
if (DecodeBasicOcspResponse(source, &idx, resp, size) < 0)
return ASN_PARSE_E;
return 0;
}
static word32 SetOcspReqExtensions(word32 extSz, byte* output,
const byte* nonce, word32 nonceSz)
{
static const byte NonceObjId[] = { 0x2b, 0x06, 0x01, 0x05, 0x05, 0x07,
0x30, 0x01, 0x02 };
byte seqArray[5][MAX_SEQ_SZ];
word32 seqSz[5], totalSz;
WOLFSSL_ENTER("SetOcspReqExtensions");
if (nonce == NULL || nonceSz == 0) return 0;
seqArray[0][0] = ASN_OCTET_STRING;
seqSz[0] = 1 + SetLength(nonceSz, &seqArray[0][1]);
seqArray[1][0] = ASN_OBJECT_ID;
seqSz[1] = 1 + SetLength(sizeof(NonceObjId), &seqArray[1][1]);
totalSz = seqSz[0] + seqSz[1] + nonceSz + (word32)sizeof(NonceObjId);
seqSz[2] = SetSequence(totalSz, seqArray[2]);
totalSz += seqSz[2];
seqSz[3] = SetSequence(totalSz, seqArray[3]);
totalSz += seqSz[3];
seqArray[4][0] = (ASN_CONSTRUCTED | ASN_CONTEXT_SPECIFIC | 2);
seqSz[4] = 1 + SetLength(totalSz, &seqArray[4][1]);
totalSz += seqSz[4];
if (totalSz < extSz)
{
totalSz = 0;
XMEMCPY(output + totalSz, seqArray[4], seqSz[4]);
totalSz += seqSz[4];
XMEMCPY(output + totalSz, seqArray[3], seqSz[3]);
totalSz += seqSz[3];
XMEMCPY(output + totalSz, seqArray[2], seqSz[2]);
totalSz += seqSz[2];
XMEMCPY(output + totalSz, seqArray[1], seqSz[1]);
totalSz += seqSz[1];
XMEMCPY(output + totalSz, NonceObjId, sizeof(NonceObjId));
totalSz += (word32)sizeof(NonceObjId);
XMEMCPY(output + totalSz, seqArray[0], seqSz[0]);
totalSz += seqSz[0];
XMEMCPY(output + totalSz, nonce, nonceSz);
totalSz += nonceSz;
}
return totalSz;
}
int EncodeOcspRequest(OcspRequest* req)
{
byte seqArray[5][MAX_SEQ_SZ];
/* The ASN.1 of the OCSP Request is an onion of sequences */
byte algoArray[MAX_ALGO_SZ];
byte issuerArray[MAX_ENCODED_DIG_SZ];
byte issuerKeyArray[MAX_ENCODED_DIG_SZ];
byte snArray[MAX_SN_SZ];
byte extArray[MAX_OCSP_EXT_SZ];
byte* output = req->dest;
word32 seqSz[5], algoSz, issuerSz, issuerKeySz, snSz, extSz, totalSz;
int i;
WOLFSSL_ENTER("EncodeOcspRequest");
#ifdef NO_SHA
algoSz = SetAlgoID(SHA256h, algoArray, hashType, 0);
#else
algoSz = SetAlgoID(SHAh, algoArray, hashType, 0);
#endif
req->issuerHash = req->cert->issuerHash;
issuerSz = SetDigest(req->cert->issuerHash, KEYID_SIZE, issuerArray);
req->issuerKeyHash = req->cert->issuerKeyHash;
issuerKeySz = SetDigest(req->cert->issuerKeyHash,
KEYID_SIZE, issuerKeyArray);
req->serial = req->cert->serial;
req->serialSz = req->cert->serialSz;
snSz = SetSerialNumber(req->cert->serial, req->cert->serialSz, snArray);
extSz = 0;
if (req->useNonce) {
RNG rng;
if (wc_InitRng(&rng) != 0) {
WOLFSSL_MSG("\tCannot initialize RNG. Skipping the OSCP Nonce.");
} else {
if (wc_RNG_GenerateBlock(&rng, req->nonce, MAX_OCSP_NONCE_SZ) != 0)
WOLFSSL_MSG("\tCannot run RNG. Skipping the OSCP Nonce.");
else {
req->nonceSz = MAX_OCSP_NONCE_SZ;
extSz = SetOcspReqExtensions(MAX_OCSP_EXT_SZ, extArray,
req->nonce, req->nonceSz);
}
wc_FreeRng(&rng);
}
}
totalSz = algoSz + issuerSz + issuerKeySz + snSz;
for (i = 4; i >= 0; i--) {
seqSz[i] = SetSequence(totalSz, seqArray[i]);
totalSz += seqSz[i];
if (i == 2) totalSz += extSz;
}
totalSz = 0;
for (i = 0; i < 5; i++) {
XMEMCPY(output + totalSz, seqArray[i], seqSz[i]);
totalSz += seqSz[i];
}
XMEMCPY(output + totalSz, algoArray, algoSz);
totalSz += algoSz;
XMEMCPY(output + totalSz, issuerArray, issuerSz);
totalSz += issuerSz;
XMEMCPY(output + totalSz, issuerKeyArray, issuerKeySz);
totalSz += issuerKeySz;
XMEMCPY(output + totalSz, snArray, snSz);
totalSz += snSz;
if (extSz != 0) {
XMEMCPY(output + totalSz, extArray, extSz);
totalSz += extSz;
}
return totalSz;
}
void InitOcspRequest(OcspRequest* req, DecodedCert* cert, byte useNonce,
byte* dest, word32 destSz)
{
WOLFSSL_ENTER("InitOcspRequest");
req->cert = cert;
req->useNonce = useNonce;
req->nonceSz = 0;
req->issuerHash = NULL;
req->issuerKeyHash = NULL;
req->serial = NULL;
req->dest = dest;
req->destSz = destSz;
}
int CompareOcspReqResp(OcspRequest* req, OcspResponse* resp)
{
int cmp;
WOLFSSL_ENTER("CompareOcspReqResp");
if (req == NULL)
{
WOLFSSL_MSG("\tReq missing");
return -1;
}
if (resp == NULL)
{
WOLFSSL_MSG("\tResp missing");
return 1;
}
/* Nonces are not critical. The responder may not necessarily add
* the nonce to the response. */
if (req->useNonce && resp->nonceSz != 0) {
cmp = req->nonceSz - resp->nonceSz;
if (cmp != 0)
{
WOLFSSL_MSG("\tnonceSz mismatch");
return cmp;
}
cmp = XMEMCMP(req->nonce, resp->nonce, req->nonceSz);
if (cmp != 0)
{
WOLFSSL_MSG("\tnonce mismatch");
return cmp;
}
}
cmp = XMEMCMP(req->issuerHash, resp->issuerHash, KEYID_SIZE);
if (cmp != 0)
{
WOLFSSL_MSG("\tissuerHash mismatch");
return cmp;
}
cmp = XMEMCMP(req->issuerKeyHash, resp->issuerKeyHash, KEYID_SIZE);
if (cmp != 0)
{
WOLFSSL_MSG("\tissuerKeyHash mismatch");
return cmp;
}
cmp = req->serialSz - resp->status->serialSz;
if (cmp != 0)
{
WOLFSSL_MSG("\tserialSz mismatch");
return cmp;
}
cmp = XMEMCMP(req->serial, resp->status->serial, req->serialSz);
if (cmp != 0)
{
WOLFSSL_MSG("\tserial mismatch");
return cmp;
}
return 0;
}
#endif
/* store SHA hash of NAME */
WOLFSSL_LOCAL int GetNameHash(const byte* source, word32* idx, byte* hash,
int maxIdx)
{
int length; /* length of all distinguished names */
int ret;
word32 dummy;
WOLFSSL_ENTER("GetNameHash");
if (source[*idx] == ASN_OBJECT_ID) {
WOLFSSL_MSG("Trying optional prefix...");
if (GetLength(source, idx, &length, maxIdx) < 0)
return ASN_PARSE_E;
*idx += length;
WOLFSSL_MSG("Got optional prefix");
}
/* For OCSP, RFC2560 section 4.1.1 states the issuer hash should be
* calculated over the entire DER encoding of the Name field, including
* the tag and length. */
dummy = *idx;
if (GetSequence(source, idx, &length, maxIdx) < 0)
return ASN_PARSE_E;
#ifdef NO_SHA
ret = wc_Sha256Hash(source + dummy, length + *idx - dummy, hash);
#else
ret = wc_ShaHash(source + dummy, length + *idx - dummy, hash);
#endif
*idx += length;
return ret;
}
#ifdef HAVE_CRL
/* initialize decoded CRL */
void InitDecodedCRL(DecodedCRL* dcrl)
{
WOLFSSL_MSG("InitDecodedCRL");
dcrl->certBegin = 0;
dcrl->sigIndex = 0;
dcrl->sigLength = 0;
dcrl->signatureOID = 0;
dcrl->certs = NULL;
dcrl->totalCerts = 0;
}
/* free decoded CRL resources */
void FreeDecodedCRL(DecodedCRL* dcrl)
{
RevokedCert* tmp = dcrl->certs;
WOLFSSL_MSG("FreeDecodedCRL");
while(tmp) {
RevokedCert* next = tmp->next;
XFREE(tmp, NULL, DYNAMIC_TYPE_REVOKED);
tmp = next;
}
}
/* Get Revoked Cert list, 0 on success */
static int GetRevoked(const byte* buff, word32* idx, DecodedCRL* dcrl,
int maxIdx)
{
int len;
word32 end;
byte b;
RevokedCert* rc;
WOLFSSL_ENTER("GetRevoked");
if (GetSequence(buff, idx, &len, maxIdx) < 0)
return ASN_PARSE_E;
end = *idx + len;
/* get serial number */
b = buff[*idx];
*idx += 1;
if (b != ASN_INTEGER) {
WOLFSSL_MSG("Expecting Integer");
return ASN_PARSE_E;
}
if (GetLength(buff, idx, &len, maxIdx) < 0)
return ASN_PARSE_E;
if (len > EXTERNAL_SERIAL_SIZE) {
WOLFSSL_MSG("Serial Size too big");
return ASN_PARSE_E;
}
rc = (RevokedCert*)XMALLOC(sizeof(RevokedCert), NULL, DYNAMIC_TYPE_CRL);
if (rc == NULL) {
WOLFSSL_MSG("Alloc Revoked Cert failed");
return MEMORY_E;
}
XMEMCPY(rc->serialNumber, &buff[*idx], len);
rc->serialSz = len;
/* add to list */
rc->next = dcrl->certs;
dcrl->certs = rc;
dcrl->totalCerts++;
*idx += len;
/* get date */
b = buff[*idx];
*idx += 1;
if (b != ASN_UTC_TIME && b != ASN_GENERALIZED_TIME) {
WOLFSSL_MSG("Expecting Date");
return ASN_PARSE_E;
}
if (GetLength(buff, idx, &len, maxIdx) < 0)
return ASN_PARSE_E;
/* skip for now */
*idx += len;
if (*idx != end) /* skip extensions */
*idx = end;
return 0;
}
/* Get CRL Signature, 0 on success */
static int GetCRL_Signature(const byte* source, word32* idx, DecodedCRL* dcrl,
int maxIdx)
{
int length;
byte b;
WOLFSSL_ENTER("GetCRL_Signature");
b = source[*idx];
*idx += 1;
if (b != ASN_BIT_STRING)
return ASN_BITSTR_E;
if (GetLength(source, idx, &length, maxIdx) < 0)
return ASN_PARSE_E;
dcrl->sigLength = length;
b = source[*idx];
*idx += 1;
if (b != 0x00)
return ASN_EXPECT_0_E;
dcrl->sigLength--;
dcrl->signature = (byte*)&source[*idx];
*idx += dcrl->sigLength;
return 0;
}
/* prase crl buffer into decoded state, 0 on success */
int ParseCRL(DecodedCRL* dcrl, const byte* buff, word32 sz, void* cm)
{
int version, len;
word32 oid, idx = 0;
Signer* ca = NULL;
WOLFSSL_MSG("ParseCRL");
/* raw crl hash */
/* hash here if needed for optimized comparisons
* Sha sha;
* wc_InitSha(&sha);
* wc_ShaUpdate(&sha, buff, sz);
* wc_ShaFinal(&sha, dcrl->crlHash); */
if (GetSequence(buff, &idx, &len, sz) < 0)
return ASN_PARSE_E;
dcrl->certBegin = idx;
if (GetSequence(buff, &idx, &len, sz) < 0)
return ASN_PARSE_E;
dcrl->sigIndex = len + idx;
/* may have version */
if (buff[idx] == ASN_INTEGER) {
if (GetMyVersion(buff, &idx, &version) < 0)
return ASN_PARSE_E;
}
if (GetAlgoId(buff, &idx, &oid, sz) < 0)
return ASN_PARSE_E;
if (GetNameHash(buff, &idx, dcrl->issuerHash, sz) < 0)
return ASN_PARSE_E;
if (GetBasicDate(buff, &idx, dcrl->lastDate, &dcrl->lastDateFormat, sz) < 0)
return ASN_PARSE_E;
if (GetBasicDate(buff, &idx, dcrl->nextDate, &dcrl->nextDateFormat, sz) < 0)
return ASN_PARSE_E;
if (!XVALIDATE_DATE(dcrl->nextDate, dcrl->nextDateFormat, AFTER)) {
WOLFSSL_MSG("CRL after date is no longer valid");
return ASN_AFTER_DATE_E;
}
if (idx != dcrl->sigIndex && buff[idx] != CRL_EXTENSIONS) {
if (GetSequence(buff, &idx, &len, sz) < 0)
return ASN_PARSE_E;
len += idx;
while (idx < (word32)len) {
if (GetRevoked(buff, &idx, dcrl, sz) < 0)
return ASN_PARSE_E;
}
}
if (idx != dcrl->sigIndex)
idx = dcrl->sigIndex; /* skip extensions */
if (GetAlgoId(buff, &idx, &dcrl->signatureOID, sz) < 0)
return ASN_PARSE_E;
if (GetCRL_Signature(buff, &idx, dcrl, sz) < 0)
return ASN_PARSE_E;
/* openssl doesn't add skid by default for CRLs cause firefox chokes
we're not assuming it's available yet */
#if !defined(NO_SKID) && defined(CRL_SKID_READY)
if (dcrl->extAuthKeyIdSet)
ca = GetCA(cm, dcrl->extAuthKeyId);
if (ca == NULL)
ca = GetCAByName(cm, dcrl->issuerHash);
#else /* NO_SKID */
ca = GetCA(cm, dcrl->issuerHash);
#endif /* NO_SKID */
WOLFSSL_MSG("About to verify CRL signature");
if (ca) {
WOLFSSL_MSG("Found CRL issuer CA");
/* try to confirm/verify signature */
#ifndef IGNORE_KEY_EXTENSIONS
if ((ca->keyUsage & KEYUSE_CRL_SIGN) == 0) {
WOLFSSL_MSG("CA cannot sign CRLs");
return ASN_CRL_NO_SIGNER_E;
}
#endif /* IGNORE_KEY_EXTENSIONS */
if (!ConfirmSignature(buff + dcrl->certBegin,
dcrl->sigIndex - dcrl->certBegin,
ca->publicKey, ca->pubKeySize, ca->keyOID,
dcrl->signature, dcrl->sigLength, dcrl->signatureOID, NULL)) {
WOLFSSL_MSG("CRL Confirm signature failed");
return ASN_CRL_CONFIRM_E;
}
}
else {
WOLFSSL_MSG("Did NOT find CRL issuer CA");
return ASN_CRL_NO_SIGNER_E;
}
return 0;
}
#endif /* HAVE_CRL */
#endif
#ifdef WOLFSSL_SEP
#endif /* WOLFSSL_SEP */