blob: 5bc59e7abd59d9aa5efaf408f608d60736a72701 [file] [log] [blame]
/** \file MacMessage.c
* Contains implementation of the functions related to HCOSE_MAC handle objects.
*/
#include <stdlib.h>
#ifndef __MBED__
#include <memory.h>
#endif
#include <stdio.h>
#include <assert.h>
#include <string.h>
#include "cose/cose.h"
#include "cose_int.h"
#include "cose/cose_configure.h"
#include "cose_crypto.h"
#if INCLUDE_MAC
COSE *MacRoot = NULL;
/*! \private
* @brief Test if a HCOSE_MAC handle is valid
*
* Internal function to test if a MAC message handle is valid.
* This will start returning invalid results and cause the code to
* crash if handles are not released before the memory that underlies them
* is deallocated. This is an issue of a block allocator is used since
* in that case it is common to allocate memory but never to de-allocate it
* and just do that in a single big block.
*
* @param h handle to be validated
* @returns result of check
*/
bool IsValidMacHandle(HCOSE_MAC h)
{
COSE_MacMessage *p = (COSE_MacMessage *)h;
return _COSE_IsInList(MacRoot, (COSE *)p);
}
HCOSE_MAC COSE_Mac_Init(COSE_INIT_FLAGS flags,
CBOR_CONTEXT_COMMA cose_errback *perr)
{
COSE_MacMessage *pobj = NULL;
CHECK_CONDITION(flags == COSE_INIT_FLAGS_NONE, COSE_ERR_INVALID_PARAMETER);
pobj = (COSE_MacMessage *)COSE_CALLOC(1, sizeof(COSE_MacMessage), context);
CHECK_CONDITION(pobj != NULL, COSE_ERR_OUT_OF_MEMORY);
if (!_COSE_Init(flags, &pobj->m_message, COSE_mac_object,
CBOR_CONTEXT_PARAM_COMMA perr)) {
goto errorReturn;
}
_COSE_InsertInList(&MacRoot, &pobj->m_message);
return (HCOSE_MAC)pobj;
errorReturn:
if (pobj != NULL) {
_COSE_Mac_Release(pobj);
COSE_FREE(pobj, context);
}
return NULL;
}
HCOSE_MAC _COSE_Mac_Init_From_Object(cn_cbor *cbor,
COSE_MacMessage *pIn,
CBOR_CONTEXT_COMMA cose_errback *perr)
{
COSE_MacMessage *pobj = pIn;
cn_cbor *pRecipients = NULL;
// cn_cbor * tmp;
cose_errback error = {COSE_ERR_NONE};
if (perr == NULL) {
perr = &error;
}
if (pobj == NULL) {
pobj =
(COSE_MacMessage *)COSE_CALLOC(1, sizeof(COSE_MacMessage), context);
}
if (pobj == NULL) {
perr->err = COSE_ERR_OUT_OF_MEMORY;
errorReturn:
if (pobj != NULL) {
_COSE_Mac_Release(pobj);
if (pIn == NULL) {
COSE_FREE(pobj, context);
}
}
return NULL;
}
if (!_COSE_Init_From_Object(
&pobj->m_message, cbor, CBOR_CONTEXT_PARAM_COMMA perr)) {
goto errorReturn;
}
pRecipients = _COSE_arrayget_int(&pobj->m_message, INDEX_MAC_RECIPIENTS);
if (pRecipients != NULL) {
CHECK_CONDITION(
pRecipients->type == CN_CBOR_ARRAY, COSE_ERR_INVALID_PARAMETER);
pRecipients = pRecipients->first_child;
while (pRecipients != NULL) {
COSE_RecipientInfo *pInfo = _COSE_Recipient_Init_From_Object(
pRecipients, CBOR_CONTEXT_PARAM_COMMA perr);
if (pInfo == NULL) {
goto errorReturn;
}
pInfo->m_recipientNext = pobj->m_recipientFirst;
pobj->m_recipientFirst = pInfo;
pRecipients = pRecipients->next;
}
}
_COSE_InsertInList(&MacRoot, &pobj->m_message);
return (HCOSE_MAC)pobj;
}
bool COSE_Mac_Free(HCOSE_MAC h)
{
#ifdef USE_CBOR_CONTEXT
cn_cbor_context *context;
#endif
COSE_MacMessage *p = (COSE_MacMessage *)h;
if (!IsValidMacHandle(h)) {
return false;
}
if (p->m_message.m_refCount > 1) {
p->m_message.m_refCount--;
return true;
}
_COSE_RemoveFromList(&MacRoot, &p->m_message);
#ifdef USE_CBOR_CONTEXT
context = &((COSE_MacMessage *)h)->m_message.m_allocContext;
#endif
_COSE_Mac_Release((COSE_MacMessage *)h);
COSE_FREE((COSE_MacMessage *)h, context);
return true;
}
bool _COSE_Mac_Release(COSE_MacMessage *p)
{
COSE_RecipientInfo *pRecipient;
COSE_RecipientInfo *pRecipient2;
for (pRecipient = p->m_recipientFirst; pRecipient != NULL;
pRecipient = pRecipient2) {
pRecipient2 = pRecipient->m_recipientNext;
COSE_Recipient_Free((HCOSE_RECIPIENT)pRecipient);
}
_COSE_Release(&p->m_message);
return true;
}
bool COSE_Mac_SetContent(HCOSE_MAC cose,
const byte *rgbContent,
size_t cbContent,
cose_errback *perr)
{
COSE_MacMessage *p = (COSE_MacMessage *)cose;
#ifdef USE_CBOR_CONTEXT
cn_cbor_context *context = &p->m_message.m_allocContext;
#endif
cn_cbor *ptmp = NULL;
cn_cbor_errback cbor_error;
CHECK_CONDITION(IsValidMacHandle(cose), COSE_ERR_INVALID_PARAMETER);
ptmp = cn_cbor_data_create(
rgbContent, (int)cbContent, CBOR_CONTEXT_PARAM_COMMA & cbor_error);
CHECK_CONDITION_CBOR(ptmp != NULL, cbor_error);
CHECK_CONDITION_CBOR(_COSE_array_replace(&p->m_message, ptmp, INDEX_BODY,
CBOR_CONTEXT_PARAM_COMMA & cbor_error),
cbor_error);
ptmp = NULL;
return true;
errorReturn:
if (ptmp != NULL) {
CN_CBOR_FREE(ptmp, context);
}
return false;
}
/*!
* @brief Set the application external data for authentication
*
* MAC data objects support the authentication of external application
* supplied data. This function is provided to supply that data to the library.
*
* The external data is not copied, nor will be it freed when the handle is
* released.
*
* @param hcose Handle for the COSE MAC data object
* @param pbEternalData point to the external data
* @param cbExternalData size of the external data
* @param perr location to return errors
* @return result of the operation.
*/
bool COSE_Mac_SetExternal(HCOSE_MAC hcose,
const byte *pbExternalData,
size_t cbExternalData,
cose_errback *perr)
{
if (!IsValidMacHandle(hcose)) {
if (perr != NULL) {
perr->err = COSE_ERR_INVALID_PARAMETER;
}
return false;
}
return _COSE_SetExternal(&((COSE_MacMessage *)hcose)->m_message,
pbExternalData, cbExternalData, perr);
}
cn_cbor *COSE_Mac_map_get_int(HCOSE_MAC h,
int key,
int flags,
cose_errback *perror)
{
if (!IsValidMacHandle(h)) {
if (perror != NULL) {
perror->err = COSE_ERR_INVALID_PARAMETER;
}
return NULL;
}
return _COSE_map_get_int(
&((COSE_MacMessage *)h)->m_message, key, flags, perror);
}
bool COSE_Mac_map_put_int(HCOSE_MAC h,
int key,
cn_cbor *value,
int flags,
cose_errback *perror)
{
if (!IsValidMacHandle(h) || (value == NULL)) {
if (perror != NULL) {
perror->err = COSE_ERR_INVALID_PARAMETER;
}
return false;
}
return _COSE_map_put(
&((COSE_MacMessage *)h)->m_message, key, value, flags, perror);
}
#endif
#if INCLUDE_MAC || INCLUDE_MAC0
bool _COSE_Mac_Build_AAD(COSE *pCose,
const char *szContext,
byte **ppbAuthData,
size_t *pcbAuthData,
CBOR_CONTEXT_COMMA cose_errback *perr)
{
cn_cbor *pAuthData = NULL;
bool fRet = false;
cn_cbor_errback cbor_error;
cn_cbor *ptmp = NULL;
cn_cbor *pcn;
size_t cbAuthData;
byte *pbAuthData = NULL;
// Build authenticated data
// Protected headers
// external data
// body
pAuthData = cn_cbor_array_create(CBOR_CONTEXT_PARAM_COMMA NULL);
CHECK_CONDITION(pAuthData != NULL, COSE_ERR_OUT_OF_MEMORY);
// Add the context string
ptmp =
cn_cbor_string_create(szContext, CBOR_CONTEXT_PARAM_COMMA & cbor_error);
CHECK_CONDITION_CBOR(ptmp != NULL, cbor_error);
CHECK_CONDITION_CBOR(
cn_cbor_array_append(pAuthData, ptmp, &cbor_error), cbor_error);
ptmp = NULL;
// Add the protected attributes
pcn = _COSE_arrayget_int(pCose, INDEX_PROTECTED);
CHECK_CONDITION((pcn != NULL) && (pcn->type == CN_CBOR_BYTES),
COSE_ERR_INVALID_PARAMETER);
if ((pcn->length == 1) && (pcn->v.bytes[0] == 0xa0)) {
ptmp = cn_cbor_data_create(NULL, 0, CBOR_CONTEXT_PARAM_COMMA NULL);
}
else {
ptmp = cn_cbor_data_create(
pcn->v.bytes, (int)pcn->length, CBOR_CONTEXT_PARAM_COMMA NULL);
}
CHECK_CONDITION(ptmp != NULL, COSE_ERR_CBOR);
CHECK_CONDITION(cn_cbor_array_append(pAuthData, ptmp, NULL), COSE_ERR_CBOR);
ptmp = NULL;
// Add the external bytes
ptmp = cn_cbor_data_create(pCose->m_pbExternal, (int)pCose->m_cbExternal,
CBOR_CONTEXT_PARAM_COMMA & cbor_error);
CHECK_CONDITION_CBOR(ptmp != NULL, cbor_error);
CHECK_CONDITION_CBOR(
cn_cbor_array_append(pAuthData, ptmp, &cbor_error), cbor_error);
ptmp = NULL;
// Add the content
pcn = _COSE_arrayget_int(pCose, INDEX_BODY);
ptmp = cn_cbor_data_create(
pcn->v.bytes, (int)pcn->length, CBOR_CONTEXT_PARAM_COMMA & cbor_error);
CHECK_CONDITION_CBOR(ptmp != NULL, cbor_error);
CHECK_CONDITION_CBOR(
cn_cbor_array_append(pAuthData, ptmp, &cbor_error), cbor_error);
ptmp = NULL;
// Turn it into bytes
cbAuthData = cn_cbor_encode_size(pAuthData);
CHECK_CONDITION(cbAuthData > 0, COSE_ERR_CBOR);
pbAuthData = (byte *)COSE_CALLOC(cbAuthData, 1, context);
CHECK_CONDITION(pbAuthData != NULL, COSE_ERR_OUT_OF_MEMORY);
CHECK_CONDITION(cn_cbor_encoder_write(pbAuthData, 0, cbAuthData,
pAuthData) == (ssize_t)cbAuthData,
COSE_ERR_CBOR);
*ppbAuthData = pbAuthData;
*pcbAuthData = cbAuthData;
pbAuthData = NULL;
fRet = true;
errorReturn:
if (pbAuthData != NULL) {
COSE_FREE(pbAuthData, context);
}
if (pAuthData != NULL) {
CN_CBOR_FREE(pAuthData, context);
}
if (ptmp != NULL) {
CN_CBOR_FREE(ptmp, context);
}
return fRet;
}
#endif
#if INCLUDE_MAC
bool COSE_Mac_encrypt(HCOSE_MAC h, cose_errback *perr)
{
COSE_MacMessage *pcose = (COSE_MacMessage *)h;
CHECK_CONDITION(IsValidMacHandle(h), COSE_ERR_INVALID_HANDLE);
CHECK_CONDITION(
pcose->m_recipientFirst != NULL, COSE_ERR_INVALID_PARAMETER);
return _COSE_Mac_compute(pcose, NULL, 0, "MAC", perr);
errorReturn:
return false;
}
#endif
#if INCLUDE_MAC || INCLUDE_MAC0
bool _COSE_Mac_compute(COSE_MacMessage *pcose,
const byte *pbKeyIn,
size_t cbKeyIn,
const char *szContext,
cose_errback *perr)
{
int alg;
int t;
COSE_RecipientInfo *pri;
const cn_cbor *cn_Alg = NULL;
byte *pbAuthData = NULL;
size_t cbitKey;
#ifdef USE_CBOR_CONTEXT
cn_cbor_context *context = &pcose->m_message.m_allocContext;
#endif
bool fRet = false;
size_t cbAuthData = 0;
const byte *pbKey = NULL;
byte *pbKeyNew = NULL;
size_t cbKey = 0;
cn_Alg = _COSE_map_get_int(
&pcose->m_message, COSE_Header_Algorithm, COSE_BOTH, perr);
if (cn_Alg == NULL) {
goto errorReturn;
}
CHECK_CONDITION(cn_Alg->type != CN_CBOR_TEXT, COSE_ERR_UNKNOWN_ALGORITHM);
CHECK_CONDITION(
((cn_Alg->type == CN_CBOR_UINT || cn_Alg->type == CN_CBOR_INT)),
COSE_ERR_INVALID_PARAMETER);
alg = (int)cn_Alg->v.uint;
// Get the key size
switch (alg) {
#ifdef USE_AES_CBC_MAC_128_64
case COSE_Algorithm_CBC_MAC_128_64:
cbitKey = 128;
break;
#endif
#ifdef USE_AES_CBC_MAC_128_128
case COSE_Algorithm_CBC_MAC_128_128:
cbitKey = 128;
break;
#endif
#ifdef USE_AES_CBC_MAC_256_64
case COSE_Algorithm_CBC_MAC_256_64:
cbitKey = 256;
break;
#endif
#ifdef USE_AES_CBC_MAC_256_128
case COSE_Algorithm_CBC_MAC_256_128:
cbitKey = 256;
break;
#endif
#ifdef USE_HMAC_256_64
case COSE_Algorithm_HMAC_256_64:
cbitKey = 256;
break;
#endif
#ifdef USE_HMAC_256_256
case COSE_Algorithm_HMAC_256_256:
cbitKey = 256;
break;
#endif
#ifdef USE_HMAC_384_384
case COSE_Algorithm_HMAC_384_384:
cbitKey = 384;
break;
#endif
#ifdef USE_HMAC_512_512
case COSE_Algorithm_HMAC_512_512:
cbitKey = 512;
break;
#endif
default:
FAIL_CONDITION(COSE_ERR_UNKNOWN_ALGORITHM);
}
// If we are doing direct encryption - then recipient generates the key
if (pbKeyIn != NULL) {
CHECK_CONDITION(cbKeyIn == cbitKey / 8, COSE_ERR_INVALID_PARAMETER);
pbKey = pbKeyIn;
cbKey = cbKeyIn;
}
else {
t = 0;
for (pri = pcose->m_recipientFirst; pri != NULL;
pri = pri->m_recipientNext) {
if (pri->m_encrypt.m_message.m_flags & 1) {
CHECK_CONDITION(pbKey == NULL, COSE_ERR_INVALID_PARAMETER);
t |= 1;
pbKeyNew =
_COSE_RecipientInfo_generateKey(pri, alg, cbitKey, perr);
cbKey = cbitKey / 8;
CHECK_CONDITION(pbKeyNew != NULL, COSE_ERR_OUT_OF_MEMORY);
pbKey = pbKeyNew;
}
else {
t |= 2;
}
}
CHECK_CONDITION(t != 3, COSE_ERR_INVALID_PARAMETER);
if (t == 2) {
pbKeyNew = (byte *)COSE_CALLOC(cbitKey / 8, 1, context);
CHECK_CONDITION(pbKeyNew != NULL, COSE_ERR_OUT_OF_MEMORY);
pbKey = pbKeyNew;
cbKey = cbitKey / 8;
rand_bytes(pbKeyNew, cbKey);
}
}
// Build protected headers
const cn_cbor *cbProtected =
_COSE_encode_protected(&pcose->m_message, perr);
if (cbProtected == NULL) {
goto errorReturn;
}
// Build authenticated data
if (!_COSE_Mac_Build_AAD(&pcose->m_message, szContext, &pbAuthData,
&cbAuthData, CBOR_CONTEXT_PARAM_COMMA perr)) {
goto errorReturn;
}
switch (alg) {
#ifdef USE_AES_CBC_MAC_128_64
case COSE_Algorithm_CBC_MAC_128_64:
if (!AES_CBC_MAC_Create(
pcose, 64, pbKey, cbKey, pbAuthData, cbAuthData, perr)) {
goto errorReturn;
}
break;
#endif
#ifdef USE_AES_CBC_MAC_256_64
case COSE_Algorithm_CBC_MAC_256_64:
if (!AES_CBC_MAC_Create(
pcose, 64, pbKey, cbKey, pbAuthData, cbAuthData, perr)) {
goto errorReturn;
}
break;
#endif
#ifdef USE_AES_CBC_MAC_128_128
case COSE_Algorithm_CBC_MAC_128_128:
if (!AES_CBC_MAC_Create(
pcose, 128, pbKey, cbKey, pbAuthData, cbAuthData, perr)) {
goto errorReturn;
}
break;
#endif
#ifdef USE_AES_CBC_MAC_256_128
case COSE_Algorithm_CBC_MAC_256_128:
if (!AES_CBC_MAC_Create(
pcose, 128, pbKey, cbKey, pbAuthData, cbAuthData, perr)) {
goto errorReturn;
}
break;
#endif
#ifdef USE_HMAC_256_64
case COSE_Algorithm_HMAC_256_64:
if (!HMAC_Create(pcose, 256, 64, pbKey, cbKey, pbAuthData,
cbAuthData, perr)) {
goto errorReturn;
}
break;
#endif
#ifdef USE_HMAC_256_256
case COSE_Algorithm_HMAC_256_256:
if (!HMAC_Create(pcose, 256, 256, pbKey, cbKey, pbAuthData,
cbAuthData, perr)) {
goto errorReturn;
}
break;
#endif
#ifdef USE_HMAC_384_384
case COSE_Algorithm_HMAC_384_384:
if (!HMAC_Create(pcose, 384, 384, pbKey, cbKey, pbAuthData,
cbAuthData, perr)) {
goto errorReturn;
}
break;
#endif
#ifdef USE_HMAC_512_512
case COSE_Algorithm_HMAC_512_512:
if (!HMAC_Create(pcose, 512, 512, pbKey, cbKey, pbAuthData,
cbAuthData, perr)) {
goto errorReturn;
}
break;
#endif
default:
FAIL_CONDITION(COSE_ERR_INVALID_PARAMETER);
}
for (pri = pcose->m_recipientFirst; pri != NULL;
pri = pri->m_recipientNext) {
if (!_COSE_Recipient_encrypt(pri, pbKey, cbKey, perr)) {
goto errorReturn;
}
}
#if INCLUDE_COUNTERSIGNATURE
if (pcose->m_message.m_counterSigners != NULL) {
if (!_COSE_CounterSign_Sign(
&pcose->m_message, CBOR_CONTEXT_PARAM_COMMA perr)) {
goto errorReturn;
}
}
#endif
// Figure out the clean up
fRet = true;
errorReturn:
if (pbKeyNew != NULL) {
memset(pbKeyNew, 0, cbKey);
COSE_FREE(pbKeyNew, context);
}
if (pbAuthData != NULL) {
COSE_FREE(pbAuthData, context);
}
return fRet;
}
#endif
#if INCLUDE_MAC
bool COSE_Mac_validate(HCOSE_MAC h, HCOSE_RECIPIENT hRecip, cose_errback *perr)
{
cose_errback error;
if (perr == NULL) {
perr = &error;
}
COSE_MacMessage *pcose = (COSE_MacMessage *)h;
COSE_RecipientInfo *pRecip = (COSE_RecipientInfo *)hRecip;
CHECK_CONDITION(IsValidMacHandle(h) && IsValidRecipientHandle(hRecip),
COSE_ERR_INVALID_PARAMETER);
return _COSE_Mac_validate(pcose, pRecip, NULL, 0, "MAC", perr);
errorReturn:
return false;
}
#endif
#if INCLUDE_MAC || INCLUDE_MAC0
bool _COSE_Mac_validate(COSE_MacMessage *pcose,
COSE_RecipientInfo *pRecip,
const byte *pbKeyIn,
size_t cbKeyIn,
const char *szContext,
cose_errback *perr)
{
byte *pbAuthData = NULL;
size_t cbitKey = 0;
bool fRet = false;
int alg;
const cn_cbor *cn = NULL;
byte *pbKeyNew = NULL;
const byte *pbKey = NULL;
#ifdef USE_CBOR_CONTEXT
cn_cbor_context *context = &pcose->m_message.m_allocContext;
#endif
size_t cbAuthData;
CHECK_CONDITION(
!((pRecip != NULL) && (pbKeyIn != NULL)), COSE_ERR_INTERNAL);
cn = _COSE_map_get_int(
&pcose->m_message, COSE_Header_Algorithm, COSE_BOTH, perr);
if (cn == NULL) {
goto errorReturn;
}
if (cn->type == CN_CBOR_TEXT) {
FAIL_CONDITION(COSE_ERR_UNKNOWN_ALGORITHM);
}
else {
CHECK_CONDITION((cn->type == CN_CBOR_UINT || cn->type == CN_CBOR_INT),
COSE_ERR_INVALID_PARAMETER);
alg = (int)cn->v.uint;
switch (alg) {
#ifdef USE_AES_CBC_MAC_128_64
case COSE_Algorithm_CBC_MAC_128_64:
cbitKey = 128;
break;
#endif
#ifdef USE_AES_CBC_MAC_128_128
case COSE_Algorithm_CBC_MAC_128_128:
cbitKey = 128;
break;
#endif
#ifdef USE_AES_CBC_MAC_256_64
case COSE_Algorithm_CBC_MAC_256_64:
cbitKey = 256;
break;
#endif
#ifdef USE_AES_CBC_MAC_256_128
case COSE_Algorithm_CBC_MAC_256_128:
cbitKey = 256;
break;
#endif
#ifdef USE_HMAC_256_64
case COSE_Algorithm_HMAC_256_64:
cbitKey = 256;
break;
#endif
#ifdef USE_HMAC_256_256
case COSE_Algorithm_HMAC_256_256:
cbitKey = 256;
break;
#endif
#ifdef USE_HMAC_384_384
case COSE_Algorithm_HMAC_384_384:
cbitKey = 384;
break;
#endif
#ifdef USE_HMAC_512_512
case COSE_Algorithm_HMAC_512_512:
cbitKey = 512;
break;
#endif
default:
FAIL_CONDITION(COSE_ERR_UNKNOWN_ALGORITHM);
break;
}
}
// Allocate the key if we have not already done so
if (pbKeyIn != NULL) {
CHECK_CONDITION(cbitKey / 8 == cbKeyIn, COSE_ERR_INVALID_PARAMETER);
pbKey = pbKeyIn;
}
else {
if (pbKeyNew == NULL) {
pbKeyNew = COSE_CALLOC(cbitKey / 8, 1, context);
CHECK_CONDITION(pbKeyNew != NULL, COSE_ERR_OUT_OF_MEMORY);
pbKey = pbKeyNew;
}
// If there is a recipient - ask it for the key
if (pRecip != NULL) {
COSE_RecipientInfo *pRecipX;
for (pRecipX = pcose->m_recipientFirst; pRecipX != NULL;
pRecipX = pRecipX->m_recipientNext) {
if (pRecip == pRecipX) {
if (!_COSE_Recipient_decrypt(
pRecipX, pRecip, alg, cbitKey, pbKeyNew, perr)) {
goto errorReturn;
}
break;
}
else if (pRecipX->m_encrypt.m_recipientFirst != NULL) {
if (_COSE_Recipient_decrypt(
pRecipX, pRecip, alg, cbitKey, pbKeyNew, perr)) {
break;
}
}
}
CHECK_CONDITION(pRecipX != NULL, COSE_ERR_NO_RECIPIENT_FOUND);
}
else {
for (pRecip = pcose->m_recipientFirst; pRecip != NULL;
pRecip = pRecip->m_recipientNext) {
if (_COSE_Recipient_decrypt(
pRecip, NULL, alg, cbitKey, pbKeyNew, perr)) {
break;
}
}
CHECK_CONDITION(pRecip != NULL, COSE_ERR_NO_RECIPIENT_FOUND);
}
}
// Build authenticated data
if (!_COSE_Mac_Build_AAD(&pcose->m_message, szContext, &pbAuthData,
&cbAuthData, CBOR_CONTEXT_PARAM_COMMA perr)) {
goto errorReturn;
}
switch (alg) {
#ifdef USE_HMAC_256_256
case COSE_Algorithm_HMAC_256_256:
if (!HMAC_Validate(pcose, 256, 256, pbKey, cbitKey / 8, pbAuthData,
cbAuthData, perr)) {
goto errorReturn;
}
break;
#endif
#ifdef USE_HMAC_256_64
case COSE_Algorithm_HMAC_256_64:
if (!HMAC_Validate(pcose, 256, 64, pbKey, cbitKey / 8, pbAuthData,
cbAuthData, perr)) {
goto errorReturn;
}
break;
#endif
#ifdef USE_HMAC_384_384
case COSE_Algorithm_HMAC_384_384:
if (!HMAC_Validate(pcose, 384, 384, pbKey, cbitKey / 8, pbAuthData,
cbAuthData, perr)) {
goto errorReturn;
}
break;
#endif
#ifdef USE_HMAC_512_512
case COSE_Algorithm_HMAC_512_512:
if (!HMAC_Validate(pcose, 512, 512, pbKey, cbitKey / 8, pbAuthData,
cbAuthData, perr)) {
goto errorReturn;
}
break;
#endif
#ifdef USE_AES_CBC_MAC_128_64
case COSE_Algorithm_CBC_MAC_128_64:
if (!AES_CBC_MAC_Validate(pcose, 64, pbKey, cbitKey / 8, pbAuthData,
cbAuthData, perr)) {
goto errorReturn;
}
break;
#endif
#ifdef USE_AES_CBC_MAC_256_64
case COSE_Algorithm_CBC_MAC_256_64:
if (!AES_CBC_MAC_Validate(pcose, 64, pbKey, cbitKey / 8, pbAuthData,
cbAuthData, perr)) {
goto errorReturn;
}
break;
#endif
#ifdef USE_AES_CBC_MAC_128_128
case COSE_Algorithm_CBC_MAC_128_128:
if (!AES_CBC_MAC_Validate(pcose, 128, pbKey, cbitKey / 8,
pbAuthData, cbAuthData, perr)) {
goto errorReturn;
}
break;
#endif
#ifdef USE_AES_CBC_MAC_256_128
case COSE_Algorithm_CBC_MAC_256_128:
if (!AES_CBC_MAC_Validate(pcose, 128, pbKey, cbitKey / 8,
pbAuthData, cbAuthData, perr)) {
goto errorReturn;
}
break;
#endif
default:
FAIL_CONDITION(COSE_ERR_UNKNOWN_ALGORITHM);
break;
}
fRet = true;
errorReturn:
if (pbKeyNew != NULL) {
memset(pbKeyNew, 0xff, cbitKey / 8);
COSE_FREE(pbKeyNew, context);
}
if (pbAuthData != NULL) {
COSE_FREE(pbAuthData, context);
}
return fRet;
}
#endif
#if INCLUDE_MAC
bool COSE_Mac_AddRecipient(HCOSE_MAC hMac,
HCOSE_RECIPIENT hRecip,
cose_errback *perr)
{
COSE_RecipientInfo *pRecip;
COSE_MacMessage *pMac;
cn_cbor *pRecipients = NULL;
cn_cbor *pRecipientsT = NULL;
#ifdef USE_CBOR_CONTEXT
cn_cbor_context *context = NULL;
#endif
cn_cbor_errback cbor_error;
CHECK_CONDITION(IsValidMacHandle(hMac), COSE_ERR_INVALID_PARAMETER);
CHECK_CONDITION(IsValidRecipientHandle(hRecip), COSE_ERR_INVALID_PARAMETER);
pMac = (COSE_MacMessage *)hMac;
pRecip = (COSE_RecipientInfo *)hRecip;
pRecip->m_recipientNext = pMac->m_recipientFirst;
pMac->m_recipientFirst = pRecip;
#ifdef USE_CBOR_CONTEXT
context = &pMac->m_message.m_allocContext;
#endif // USE_CBOR_CONTEXT
pRecipients = _COSE_arrayget_int(&pMac->m_message, INDEX_MAC_RECIPIENTS);
if (pRecipients == NULL) {
pRecipientsT =
cn_cbor_array_create(CBOR_CONTEXT_PARAM_COMMA & cbor_error);
CHECK_CONDITION_CBOR(pRecipientsT != NULL, cbor_error);
CHECK_CONDITION_CBOR(
_COSE_array_replace(&pMac->m_message, pRecipientsT,
INDEX_MAC_RECIPIENTS, CBOR_CONTEXT_PARAM_COMMA & cbor_error),
cbor_error);
pRecipients = pRecipientsT;
pRecipientsT = NULL;
}
CHECK_CONDITION_CBOR(cn_cbor_array_append(pRecipients,
pRecip->m_encrypt.m_message.m_cbor, &cbor_error),
cbor_error);
pRecip->m_encrypt.m_message.m_refCount++;
return true;
errorReturn:
if (pRecipientsT == NULL) {
CN_CBOR_FREE(pRecipientsT, context);
}
return false;
}
HCOSE_RECIPIENT COSE_Mac_GetRecipient(HCOSE_MAC cose,
int iRecipient,
cose_errback *perr)
{
int i;
COSE_RecipientInfo *p;
CHECK_CONDITION(IsValidMacHandle(cose), COSE_ERR_INVALID_PARAMETER);
p = ((COSE_MacMessage *)cose)->m_recipientFirst;
for (i = 0; i < iRecipient; i++) {
CHECK_CONDITION(p != NULL, COSE_ERR_NO_RECIPIENT_FOUND);
p = p->m_recipientNext;
}
if (p != NULL) {
p->m_encrypt.m_message.m_refCount++;
}
return (HCOSE_RECIPIENT)p;
errorReturn:
return NULL;
}
#endif