diff options
Diffstat (limited to 'lib/mbedtls-2.27.0/library/x509_crl.c')
| -rw-r--r-- | lib/mbedtls-2.27.0/library/x509_crl.c | 768 |
1 files changed, 768 insertions, 0 deletions
diff --git a/lib/mbedtls-2.27.0/library/x509_crl.c b/lib/mbedtls-2.27.0/library/x509_crl.c new file mode 100644 index 0000000..ac4fc75 --- /dev/null +++ b/lib/mbedtls-2.27.0/library/x509_crl.c @@ -0,0 +1,768 @@ +/* + * X.509 Certidicate Revocation List (CRL) parsing + * + * Copyright The Mbed TLS Contributors + * 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. + */ +/* + * 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 + */ + +#include "common.h" + +#if defined(MBEDTLS_X509_CRL_PARSE_C) + +#include "mbedtls/x509_crl.h" +#include "mbedtls/error.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 = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED; + + if( ( ret = mbedtls_asn1_get_int( p, end, ver ) ) != 0 ) + { + if( ret == MBEDTLS_ERR_ASN1_UNEXPECTED_TAG ) + { + *ver = 0; + return( 0 ); + } + + return( MBEDTLS_ERROR_ADD( 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 = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED; + + if( *p == end ) + return( 0 ); + + /* + * crlExtensions [0] EXPLICIT Extensions OPTIONAL + * -- if present, version MUST be v2 + */ + if( ( ret = mbedtls_x509_get_ext( p, end, ext, 0 ) ) != 0 ) + return( ret ); + + end = ext->p + ext->len; + + 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_ERROR_ADD( 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_ERROR_ADD( 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_ERROR_ADD( 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_ERROR_ADD( MBEDTLS_ERR_X509_INVALID_EXTENSIONS, ret ) ); + + /* Ignore data so far and just check its length */ + *p += len; + if( *p != end_ext_data ) + return( MBEDTLS_ERROR_ADD( MBEDTLS_ERR_X509_INVALID_EXTENSIONS, + MBEDTLS_ERR_ASN1_LENGTH_MISMATCH ) ); + + /* Abort on (unsupported) critical extensions */ + if( is_critical ) + return( MBEDTLS_ERROR_ADD( MBEDTLS_ERR_X509_INVALID_EXTENSIONS, + MBEDTLS_ERR_ASN1_UNEXPECTED_TAG ) ); + } + + if( *p != end ) + return( MBEDTLS_ERROR_ADD( 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 = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED; + 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_ERROR_ADD( MBEDTLS_ERR_X509_INVALID_EXTENSIONS, ret ) ); + } + + end = *p + ext->len; + + if( end != *p + ext->len ) + return( MBEDTLS_ERROR_ADD( 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_ERROR_ADD( MBEDTLS_ERR_X509_INVALID_EXTENSIONS, ret ) ); + + *p += len; + } + + if( *p != end ) + return( MBEDTLS_ERROR_ADD( 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 = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED; + 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; + + cur_entry->raw.tag = **p; + if( ( ret = mbedtls_asn1_get_tag( p, end, &len2, + MBEDTLS_ASN1_SEQUENCE | MBEDTLS_ASN1_CONSTRUCTED ) ) != 0 ) + { + return( ret ); + } + + 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 = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED; + 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_ERROR_ADD( 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_ERROR_ADD( 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_ERROR_ADD( 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_ERROR_ADD( MBEDTLS_ERR_X509_INVALID_DATE, + MBEDTLS_ERR_ASN1_UNEXPECTED_TAG ) ) && + ret != ( MBEDTLS_ERROR_ADD( 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_ERROR_ADD( 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_ERROR_ADD( 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 = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED; + size_t use_len = 0; + 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 = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED; + 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 = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED; + 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 */ |