/* | |
* X.509 Certidicate Revocation List (CRL) parsing | |
* | |
* Copyright (C) 2006-2015, ARM Limited, All Rights Reserved | |
* SPDX-License-Identifier: Apache-2.0 | |
* | |
* Licensed under the Apache License, Version 2.0 (the "License"); you may | |
* not use this file except in compliance with the License. | |
* You may obtain a copy of the License at | |
* | |
* http://www.apache.org/licenses/LICENSE-2.0 | |
* | |
* Unless required by applicable law or agreed to in writing, software | |
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT | |
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | |
* See the License for the specific language governing permissions and | |
* limitations under the License. | |
* | |
* This file is part of mbed TLS (https://tls.mbed.org) | |
*/ | |
/* | |
* The ITU-T X.509 standard defines a certificate format for PKI. | |
* | |
* http://www.ietf.org/rfc/rfc5280.txt (Certificates and CRLs) | |
* http://www.ietf.org/rfc/rfc3279.txt (Alg IDs for CRLs) | |
* http://www.ietf.org/rfc/rfc2986.txt (CSRs, aka PKCS#10) | |
* | |
* http://www.itu.int/ITU-T/studygroups/com17/languages/X.680-0207.pdf | |
* http://www.itu.int/ITU-T/studygroups/com17/languages/X.690-0207.pdf | |
*/ | |
#if !defined(MBEDTLS_CONFIG_FILE) | |
#include "mbedtls/config.h" | |
#else | |
#include MBEDTLS_CONFIG_FILE | |
#endif | |
#if defined(MBEDTLS_X509_CRL_PARSE_C) | |
#include "mbedtls/x509_crl.h" | |
#include "mbedtls/oid.h" | |
#include "mbedtls/platform_util.h" | |
#include <string.h> | |
#if defined(MBEDTLS_PEM_PARSE_C) | |
#include "mbedtls/pem.h" | |
#endif | |
#if defined(MBEDTLS_PLATFORM_C) | |
#include "mbedtls/platform.h" | |
#else | |
#include <stdlib.h> | |
#include <stdio.h> | |
#define mbedtls_free free | |
#define mbedtls_calloc calloc | |
#define mbedtls_snprintf snprintf | |
#endif | |
#if defined(_WIN32) && !defined(EFIX64) && !defined(EFI32) | |
#include <windows.h> | |
#else | |
#include <time.h> | |
#endif | |
#if defined(MBEDTLS_FS_IO) || defined(EFIX64) || defined(EFI32) | |
#include <stdio.h> | |
#endif | |
/* | |
* Version ::= INTEGER { v1(0), v2(1) } | |
*/ | |
static int x509_crl_get_version( unsigned char **p, | |
const unsigned char *end, | |
int *ver ) | |
{ | |
int ret; | |
if( ( ret = mbedtls_asn1_get_int( p, end, ver ) ) != 0 ) | |
{ | |
if( ret == MBEDTLS_ERR_ASN1_UNEXPECTED_TAG ) | |
{ | |
*ver = 0; | |
return( 0 ); | |
} | |
return( MBEDTLS_ERR_X509_INVALID_VERSION + ret ); | |
} | |
return( 0 ); | |
} | |
/* | |
* X.509 CRL v2 extensions | |
* | |
* We currently don't parse any extension's content, but we do check that the | |
* list of extensions is well-formed and abort on critical extensions (that | |
* are unsupported as we don't support any extension so far) | |
*/ | |
static int x509_get_crl_ext( unsigned char **p, | |
const unsigned char *end, | |
mbedtls_x509_buf *ext ) | |
{ | |
int ret; | |
/* | |
* crlExtensions [0] EXPLICIT Extensions OPTIONAL | |
* -- if present, version MUST be v2 | |
*/ | |
if( ( ret = mbedtls_x509_get_ext( p, end, ext, 0 ) ) != 0 ) | |
{ | |
if( ret == MBEDTLS_ERR_ASN1_UNEXPECTED_TAG ) | |
return( 0 ); | |
return( ret ); | |
} | |
while( *p < end ) | |
{ | |
/* | |
* Extension ::= SEQUENCE { | |
* extnID OBJECT IDENTIFIER, | |
* critical BOOLEAN DEFAULT FALSE, | |
* extnValue OCTET STRING } | |
*/ | |
int is_critical = 0; | |
const unsigned char *end_ext_data; | |
size_t len; | |
/* Get enclosing sequence tag */ | |
if( ( ret = mbedtls_asn1_get_tag( p, end, &len, | |
MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE ) ) != 0 ) | |
return( MBEDTLS_ERR_X509_INVALID_EXTENSIONS + ret ); | |
end_ext_data = *p + len; | |
/* Get OID (currently ignored) */ | |
if( ( ret = mbedtls_asn1_get_tag( p, end_ext_data, &len, | |
MBEDTLS_ASN1_OID ) ) != 0 ) | |
{ | |
return( MBEDTLS_ERR_X509_INVALID_EXTENSIONS + ret ); | |
} | |
*p += len; | |
/* Get optional critical */ | |
if( ( ret = mbedtls_asn1_get_bool( p, end_ext_data, | |
&is_critical ) ) != 0 && | |
( ret != MBEDTLS_ERR_ASN1_UNEXPECTED_TAG ) ) | |
{ | |
return( MBEDTLS_ERR_X509_INVALID_EXTENSIONS + ret ); | |
} | |
/* Data should be octet string type */ | |
if( ( ret = mbedtls_asn1_get_tag( p, end_ext_data, &len, | |
MBEDTLS_ASN1_OCTET_STRING ) ) != 0 ) | |
return( MBEDTLS_ERR_X509_INVALID_EXTENSIONS + ret ); | |
/* Ignore data so far and just check its length */ | |
*p += len; | |
if( *p != end_ext_data ) | |
return( MBEDTLS_ERR_X509_INVALID_EXTENSIONS + | |
MBEDTLS_ERR_ASN1_LENGTH_MISMATCH ); | |
/* Abort on (unsupported) critical extensions */ | |
if( is_critical ) | |
return( MBEDTLS_ERR_X509_INVALID_EXTENSIONS + | |
MBEDTLS_ERR_ASN1_UNEXPECTED_TAG ); | |
} | |
if( *p != end ) | |
return( MBEDTLS_ERR_X509_INVALID_EXTENSIONS + | |
MBEDTLS_ERR_ASN1_LENGTH_MISMATCH ); | |
return( 0 ); | |
} | |
/* | |
* X.509 CRL v2 entry extensions (no extensions parsed yet.) | |
*/ | |
static int x509_get_crl_entry_ext( unsigned char **p, | |
const unsigned char *end, | |
mbedtls_x509_buf *ext ) | |
{ | |
int ret; | |
size_t len = 0; | |
/* OPTIONAL */ | |
if( end <= *p ) | |
return( 0 ); | |
ext->tag = **p; | |
ext->p = *p; | |
/* | |
* Get CRL-entry extension sequence header | |
* crlEntryExtensions Extensions OPTIONAL -- if present, MUST be v2 | |
*/ | |
if( ( ret = mbedtls_asn1_get_tag( p, end, &ext->len, | |
MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE ) ) != 0 ) | |
{ | |
if( ret == MBEDTLS_ERR_ASN1_UNEXPECTED_TAG ) | |
{ | |
ext->p = NULL; | |
return( 0 ); | |
} | |
return( MBEDTLS_ERR_X509_INVALID_EXTENSIONS + ret ); | |
} | |
end = *p + ext->len; | |
if( end != *p + ext->len ) | |
return( MBEDTLS_ERR_X509_INVALID_EXTENSIONS + | |
MBEDTLS_ERR_ASN1_LENGTH_MISMATCH ); | |
while( *p < end ) | |
{ | |
if( ( ret = mbedtls_asn1_get_tag( p, end, &len, | |
MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE ) ) != 0 ) | |
return( MBEDTLS_ERR_X509_INVALID_EXTENSIONS + ret ); | |
*p += len; | |
} | |
if( *p != end ) | |
return( MBEDTLS_ERR_X509_INVALID_EXTENSIONS + | |
MBEDTLS_ERR_ASN1_LENGTH_MISMATCH ); | |
return( 0 ); | |
} | |
/* | |
* X.509 CRL Entries | |
*/ | |
static int x509_get_entries( unsigned char **p, | |
const unsigned char *end, | |
mbedtls_x509_crl_entry *entry ) | |
{ | |
int ret; | |
size_t entry_len; | |
mbedtls_x509_crl_entry *cur_entry = entry; | |
if( *p == end ) | |
return( 0 ); | |
if( ( ret = mbedtls_asn1_get_tag( p, end, &entry_len, | |
MBEDTLS_ASN1_SEQUENCE | MBEDTLS_ASN1_CONSTRUCTED ) ) != 0 ) | |
{ | |
if( ret == MBEDTLS_ERR_ASN1_UNEXPECTED_TAG ) | |
return( 0 ); | |
return( ret ); | |
} | |
end = *p + entry_len; | |
while( *p < end ) | |
{ | |
size_t len2; | |
const unsigned char *end2; | |
if( ( ret = mbedtls_asn1_get_tag( p, end, &len2, | |
MBEDTLS_ASN1_SEQUENCE | MBEDTLS_ASN1_CONSTRUCTED ) ) != 0 ) | |
{ | |
return( ret ); | |
} | |
cur_entry->raw.tag = **p; | |
cur_entry->raw.p = *p; | |
cur_entry->raw.len = len2; | |
end2 = *p + len2; | |
if( ( ret = mbedtls_x509_get_serial( p, end2, &cur_entry->serial ) ) != 0 ) | |
return( ret ); | |
if( ( ret = mbedtls_x509_get_time( p, end2, | |
&cur_entry->revocation_date ) ) != 0 ) | |
return( ret ); | |
if( ( ret = x509_get_crl_entry_ext( p, end2, | |
&cur_entry->entry_ext ) ) != 0 ) | |
return( ret ); | |
if( *p < end ) | |
{ | |
cur_entry->next = mbedtls_calloc( 1, sizeof( mbedtls_x509_crl_entry ) ); | |
if( cur_entry->next == NULL ) | |
return( MBEDTLS_ERR_X509_ALLOC_FAILED ); | |
cur_entry = cur_entry->next; | |
} | |
} | |
return( 0 ); | |
} | |
/* | |
* Parse one CRLs in DER format and append it to the chained list | |
*/ | |
int mbedtls_x509_crl_parse_der( mbedtls_x509_crl *chain, | |
const unsigned char *buf, size_t buflen ) | |
{ | |
int ret; | |
size_t len; | |
unsigned char *p = NULL, *end = NULL; | |
mbedtls_x509_buf sig_params1, sig_params2, sig_oid2; | |
mbedtls_x509_crl *crl = chain; | |
/* | |
* Check for valid input | |
*/ | |
if( crl == NULL || buf == NULL ) | |
return( MBEDTLS_ERR_X509_BAD_INPUT_DATA ); | |
memset( &sig_params1, 0, sizeof( mbedtls_x509_buf ) ); | |
memset( &sig_params2, 0, sizeof( mbedtls_x509_buf ) ); | |
memset( &sig_oid2, 0, sizeof( mbedtls_x509_buf ) ); | |
/* | |
* Add new CRL on the end of the chain if needed. | |
*/ | |
while( crl->version != 0 && crl->next != NULL ) | |
crl = crl->next; | |
if( crl->version != 0 && crl->next == NULL ) | |
{ | |
crl->next = mbedtls_calloc( 1, sizeof( mbedtls_x509_crl ) ); | |
if( crl->next == NULL ) | |
{ | |
mbedtls_x509_crl_free( crl ); | |
return( MBEDTLS_ERR_X509_ALLOC_FAILED ); | |
} | |
mbedtls_x509_crl_init( crl->next ); | |
crl = crl->next; | |
} | |
/* | |
* Copy raw DER-encoded CRL | |
*/ | |
if( buflen == 0 ) | |
return( MBEDTLS_ERR_X509_INVALID_FORMAT ); | |
p = mbedtls_calloc( 1, buflen ); | |
if( p == NULL ) | |
return( MBEDTLS_ERR_X509_ALLOC_FAILED ); | |
memcpy( p, buf, buflen ); | |
crl->raw.p = p; | |
crl->raw.len = buflen; | |
end = p + buflen; | |
/* | |
* CertificateList ::= SEQUENCE { | |
* tbsCertList TBSCertList, | |
* signatureAlgorithm AlgorithmIdentifier, | |
* signatureValue BIT STRING } | |
*/ | |
if( ( ret = mbedtls_asn1_get_tag( &p, end, &len, | |
MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE ) ) != 0 ) | |
{ | |
mbedtls_x509_crl_free( crl ); | |
return( MBEDTLS_ERR_X509_INVALID_FORMAT ); | |
} | |
if( len != (size_t) ( end - p ) ) | |
{ | |
mbedtls_x509_crl_free( crl ); | |
return( MBEDTLS_ERR_X509_INVALID_FORMAT + | |
MBEDTLS_ERR_ASN1_LENGTH_MISMATCH ); | |
} | |
/* | |
* TBSCertList ::= SEQUENCE { | |
*/ | |
crl->tbs.p = p; | |
if( ( ret = mbedtls_asn1_get_tag( &p, end, &len, | |
MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE ) ) != 0 ) | |
{ | |
mbedtls_x509_crl_free( crl ); | |
return( MBEDTLS_ERR_X509_INVALID_FORMAT + ret ); | |
} | |
end = p + len; | |
crl->tbs.len = end - crl->tbs.p; | |
/* | |
* Version ::= INTEGER OPTIONAL { v1(0), v2(1) } | |
* -- if present, MUST be v2 | |
* | |
* signature AlgorithmIdentifier | |
*/ | |
if( ( ret = x509_crl_get_version( &p, end, &crl->version ) ) != 0 || | |
( ret = mbedtls_x509_get_alg( &p, end, &crl->sig_oid, &sig_params1 ) ) != 0 ) | |
{ | |
mbedtls_x509_crl_free( crl ); | |
return( ret ); | |
} | |
if( crl->version < 0 || crl->version > 1 ) | |
{ | |
mbedtls_x509_crl_free( crl ); | |
return( MBEDTLS_ERR_X509_UNKNOWN_VERSION ); | |
} | |
crl->version++; | |
if( ( ret = mbedtls_x509_get_sig_alg( &crl->sig_oid, &sig_params1, | |
&crl->sig_md, &crl->sig_pk, | |
&crl->sig_opts ) ) != 0 ) | |
{ | |
mbedtls_x509_crl_free( crl ); | |
return( MBEDTLS_ERR_X509_UNKNOWN_SIG_ALG ); | |
} | |
/* | |
* issuer Name | |
*/ | |
crl->issuer_raw.p = p; | |
if( ( ret = mbedtls_asn1_get_tag( &p, end, &len, | |
MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE ) ) != 0 ) | |
{ | |
mbedtls_x509_crl_free( crl ); | |
return( MBEDTLS_ERR_X509_INVALID_FORMAT + ret ); | |
} | |
if( ( ret = mbedtls_x509_get_name( &p, p + len, &crl->issuer ) ) != 0 ) | |
{ | |
mbedtls_x509_crl_free( crl ); | |
return( ret ); | |
} | |
crl->issuer_raw.len = p - crl->issuer_raw.p; | |
/* | |
* thisUpdate Time | |
* nextUpdate Time OPTIONAL | |
*/ | |
if( ( ret = mbedtls_x509_get_time( &p, end, &crl->this_update ) ) != 0 ) | |
{ | |
mbedtls_x509_crl_free( crl ); | |
return( ret ); | |
} | |
if( ( ret = mbedtls_x509_get_time( &p, end, &crl->next_update ) ) != 0 ) | |
{ | |
if( ret != ( MBEDTLS_ERR_X509_INVALID_DATE + | |
MBEDTLS_ERR_ASN1_UNEXPECTED_TAG ) && | |
ret != ( MBEDTLS_ERR_X509_INVALID_DATE + | |
MBEDTLS_ERR_ASN1_OUT_OF_DATA ) ) | |
{ | |
mbedtls_x509_crl_free( crl ); | |
return( ret ); | |
} | |
} | |
/* | |
* revokedCertificates SEQUENCE OF SEQUENCE { | |
* userCertificate CertificateSerialNumber, | |
* revocationDate Time, | |
* crlEntryExtensions Extensions OPTIONAL | |
* -- if present, MUST be v2 | |
* } OPTIONAL | |
*/ | |
if( ( ret = x509_get_entries( &p, end, &crl->entry ) ) != 0 ) | |
{ | |
mbedtls_x509_crl_free( crl ); | |
return( ret ); | |
} | |
/* | |
* crlExtensions EXPLICIT Extensions OPTIONAL | |
* -- if present, MUST be v2 | |
*/ | |
if( crl->version == 2 ) | |
{ | |
ret = x509_get_crl_ext( &p, end, &crl->crl_ext ); | |
if( ret != 0 ) | |
{ | |
mbedtls_x509_crl_free( crl ); | |
return( ret ); | |
} | |
} | |
if( p != end ) | |
{ | |
mbedtls_x509_crl_free( crl ); | |
return( MBEDTLS_ERR_X509_INVALID_FORMAT + | |
MBEDTLS_ERR_ASN1_LENGTH_MISMATCH ); | |
} | |
end = crl->raw.p + crl->raw.len; | |
/* | |
* signatureAlgorithm AlgorithmIdentifier, | |
* signatureValue BIT STRING | |
*/ | |
if( ( ret = mbedtls_x509_get_alg( &p, end, &sig_oid2, &sig_params2 ) ) != 0 ) | |
{ | |
mbedtls_x509_crl_free( crl ); | |
return( ret ); | |
} | |
if( crl->sig_oid.len != sig_oid2.len || | |
memcmp( crl->sig_oid.p, sig_oid2.p, crl->sig_oid.len ) != 0 || | |
sig_params1.len != sig_params2.len || | |
( sig_params1.len != 0 && | |
memcmp( sig_params1.p, sig_params2.p, sig_params1.len ) != 0 ) ) | |
{ | |
mbedtls_x509_crl_free( crl ); | |
return( MBEDTLS_ERR_X509_SIG_MISMATCH ); | |
} | |
if( ( ret = mbedtls_x509_get_sig( &p, end, &crl->sig ) ) != 0 ) | |
{ | |
mbedtls_x509_crl_free( crl ); | |
return( ret ); | |
} | |
if( p != end ) | |
{ | |
mbedtls_x509_crl_free( crl ); | |
return( MBEDTLS_ERR_X509_INVALID_FORMAT + | |
MBEDTLS_ERR_ASN1_LENGTH_MISMATCH ); | |
} | |
return( 0 ); | |
} | |
/* | |
* Parse one or more CRLs and add them to the chained list | |
*/ | |
int mbedtls_x509_crl_parse( mbedtls_x509_crl *chain, const unsigned char *buf, size_t buflen ) | |
{ | |
#if defined(MBEDTLS_PEM_PARSE_C) | |
int ret; | |
size_t use_len; | |
mbedtls_pem_context pem; | |
int is_pem = 0; | |
if( chain == NULL || buf == NULL ) | |
return( MBEDTLS_ERR_X509_BAD_INPUT_DATA ); | |
do | |
{ | |
mbedtls_pem_init( &pem ); | |
// Avoid calling mbedtls_pem_read_buffer() on non-null-terminated | |
// string | |
if( buflen == 0 || buf[buflen - 1] != '\0' ) | |
ret = MBEDTLS_ERR_PEM_NO_HEADER_FOOTER_PRESENT; | |
else | |
ret = mbedtls_pem_read_buffer( &pem, | |
"-----BEGIN X509 CRL-----", | |
"-----END X509 CRL-----", | |
buf, NULL, 0, &use_len ); | |
if( ret == 0 ) | |
{ | |
/* | |
* Was PEM encoded | |
*/ | |
is_pem = 1; | |
buflen -= use_len; | |
buf += use_len; | |
if( ( ret = mbedtls_x509_crl_parse_der( chain, | |
pem.buf, pem.buflen ) ) != 0 ) | |
{ | |
mbedtls_pem_free( &pem ); | |
return( ret ); | |
} | |
} | |
else if( is_pem ) | |
{ | |
mbedtls_pem_free( &pem ); | |
return( ret ); | |
} | |
mbedtls_pem_free( &pem ); | |
} | |
/* In the PEM case, buflen is 1 at the end, for the terminated NULL byte. | |
* And a valid CRL cannot be less than 1 byte anyway. */ | |
while( is_pem && buflen > 1 ); | |
if( is_pem ) | |
return( 0 ); | |
else | |
#endif /* MBEDTLS_PEM_PARSE_C */ | |
return( mbedtls_x509_crl_parse_der( chain, buf, buflen ) ); | |
} | |
#if defined(MBEDTLS_FS_IO) | |
/* | |
* Load one or more CRLs and add them to the chained list | |
*/ | |
int mbedtls_x509_crl_parse_file( mbedtls_x509_crl *chain, const char *path ) | |
{ | |
int ret; | |
size_t n; | |
unsigned char *buf; | |
if( ( ret = mbedtls_pk_load_file( path, &buf, &n ) ) != 0 ) | |
return( ret ); | |
ret = mbedtls_x509_crl_parse( chain, buf, n ); | |
mbedtls_platform_zeroize( buf, n ); | |
mbedtls_free( buf ); | |
return( ret ); | |
} | |
#endif /* MBEDTLS_FS_IO */ | |
/* | |
* Return an informational string about the certificate. | |
*/ | |
#define BEFORE_COLON 14 | |
#define BC "14" | |
/* | |
* Return an informational string about the CRL. | |
*/ | |
int mbedtls_x509_crl_info( char *buf, size_t size, const char *prefix, | |
const mbedtls_x509_crl *crl ) | |
{ | |
int ret; | |
size_t n; | |
char *p; | |
const mbedtls_x509_crl_entry *entry; | |
p = buf; | |
n = size; | |
ret = mbedtls_snprintf( p, n, "%sCRL version : %d", | |
prefix, crl->version ); | |
MBEDTLS_X509_SAFE_SNPRINTF; | |
ret = mbedtls_snprintf( p, n, "\n%sissuer name : ", prefix ); | |
MBEDTLS_X509_SAFE_SNPRINTF; | |
ret = mbedtls_x509_dn_gets( p, n, &crl->issuer ); | |
MBEDTLS_X509_SAFE_SNPRINTF; | |
ret = mbedtls_snprintf( p, n, "\n%sthis update : " \ | |
"%04d-%02d-%02d %02d:%02d:%02d", prefix, | |
crl->this_update.year, crl->this_update.mon, | |
crl->this_update.day, crl->this_update.hour, | |
crl->this_update.min, crl->this_update.sec ); | |
MBEDTLS_X509_SAFE_SNPRINTF; | |
ret = mbedtls_snprintf( p, n, "\n%snext update : " \ | |
"%04d-%02d-%02d %02d:%02d:%02d", prefix, | |
crl->next_update.year, crl->next_update.mon, | |
crl->next_update.day, crl->next_update.hour, | |
crl->next_update.min, crl->next_update.sec ); | |
MBEDTLS_X509_SAFE_SNPRINTF; | |
entry = &crl->entry; | |
ret = mbedtls_snprintf( p, n, "\n%sRevoked certificates:", | |
prefix ); | |
MBEDTLS_X509_SAFE_SNPRINTF; | |
while( entry != NULL && entry->raw.len != 0 ) | |
{ | |
ret = mbedtls_snprintf( p, n, "\n%sserial number: ", | |
prefix ); | |
MBEDTLS_X509_SAFE_SNPRINTF; | |
ret = mbedtls_x509_serial_gets( p, n, &entry->serial ); | |
MBEDTLS_X509_SAFE_SNPRINTF; | |
ret = mbedtls_snprintf( p, n, " revocation date: " \ | |
"%04d-%02d-%02d %02d:%02d:%02d", | |
entry->revocation_date.year, entry->revocation_date.mon, | |
entry->revocation_date.day, entry->revocation_date.hour, | |
entry->revocation_date.min, entry->revocation_date.sec ); | |
MBEDTLS_X509_SAFE_SNPRINTF; | |
entry = entry->next; | |
} | |
ret = mbedtls_snprintf( p, n, "\n%ssigned using : ", prefix ); | |
MBEDTLS_X509_SAFE_SNPRINTF; | |
ret = mbedtls_x509_sig_alg_gets( p, n, &crl->sig_oid, crl->sig_pk, crl->sig_md, | |
crl->sig_opts ); | |
MBEDTLS_X509_SAFE_SNPRINTF; | |
ret = mbedtls_snprintf( p, n, "\n" ); | |
MBEDTLS_X509_SAFE_SNPRINTF; | |
return( (int) ( size - n ) ); | |
} | |
/* | |
* Initialize a CRL chain | |
*/ | |
void mbedtls_x509_crl_init( mbedtls_x509_crl *crl ) | |
{ | |
memset( crl, 0, sizeof(mbedtls_x509_crl) ); | |
} | |
/* | |
* Unallocate all CRL data | |
*/ | |
void mbedtls_x509_crl_free( mbedtls_x509_crl *crl ) | |
{ | |
mbedtls_x509_crl *crl_cur = crl; | |
mbedtls_x509_crl *crl_prv; | |
mbedtls_x509_name *name_cur; | |
mbedtls_x509_name *name_prv; | |
mbedtls_x509_crl_entry *entry_cur; | |
mbedtls_x509_crl_entry *entry_prv; | |
if( crl == NULL ) | |
return; | |
do | |
{ | |
#if defined(MBEDTLS_X509_RSASSA_PSS_SUPPORT) | |
mbedtls_free( crl_cur->sig_opts ); | |
#endif | |
name_cur = crl_cur->issuer.next; | |
while( name_cur != NULL ) | |
{ | |
name_prv = name_cur; | |
name_cur = name_cur->next; | |
mbedtls_platform_zeroize( name_prv, sizeof( mbedtls_x509_name ) ); | |
mbedtls_free( name_prv ); | |
} | |
entry_cur = crl_cur->entry.next; | |
while( entry_cur != NULL ) | |
{ | |
entry_prv = entry_cur; | |
entry_cur = entry_cur->next; | |
mbedtls_platform_zeroize( entry_prv, | |
sizeof( mbedtls_x509_crl_entry ) ); | |
mbedtls_free( entry_prv ); | |
} | |
if( crl_cur->raw.p != NULL ) | |
{ | |
mbedtls_platform_zeroize( crl_cur->raw.p, crl_cur->raw.len ); | |
mbedtls_free( crl_cur->raw.p ); | |
} | |
crl_cur = crl_cur->next; | |
} | |
while( crl_cur != NULL ); | |
crl_cur = crl; | |
do | |
{ | |
crl_prv = crl_cur; | |
crl_cur = crl_cur->next; | |
mbedtls_platform_zeroize( crl_prv, sizeof( mbedtls_x509_crl ) ); | |
if( crl_prv != crl ) | |
mbedtls_free( crl_prv ); | |
} | |
while( crl_cur != NULL ); | |
} | |
#endif /* MBEDTLS_X509_CRL_PARSE_C */ |