762 lines
21 KiB
C
762 lines
21 KiB
C
/*
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* X.509 Certificate Revocation List (CRL) parsing
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*
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* Copyright The Mbed TLS Contributors
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* SPDX-License-Identifier: Apache-2.0
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*
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* Licensed under the Apache License, Version 2.0 (the "License"); you may
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* not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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/*
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* The ITU-T X.509 standard defines a certificate format for PKI.
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*
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* http://www.ietf.org/rfc/rfc5280.txt (Certificates and CRLs)
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* http://www.ietf.org/rfc/rfc3279.txt (Alg IDs for CRLs)
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* http://www.ietf.org/rfc/rfc2986.txt (CSRs, aka PKCS#10)
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*
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* http://www.itu.int/ITU-T/studygroups/com17/languages/X.680-0207.pdf
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* http://www.itu.int/ITU-T/studygroups/com17/languages/X.690-0207.pdf
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*/
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#include "common.h"
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#if defined(MBEDTLS_X509_CRL_PARSE_C)
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#include "mbedtls/x509_crl.h"
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#include "mbedtls/error.h"
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#include "mbedtls/oid.h"
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#include "mbedtls/platform_util.h"
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#include <string.h>
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#if defined(MBEDTLS_PEM_PARSE_C)
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#include "mbedtls/pem.h"
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#endif
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#include "mbedtls/platform.h"
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#if defined(MBEDTLS_HAVE_TIME)
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#if defined(_WIN32) && !defined(EFIX64) && !defined(EFI32)
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#include <windows.h>
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#else
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#include <time.h>
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#endif
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#endif
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#if defined(MBEDTLS_FS_IO) || defined(EFIX64) || defined(EFI32)
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#include <stdio.h>
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#endif
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/*
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* Version ::= INTEGER { v1(0), v2(1) }
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*/
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static int x509_crl_get_version( unsigned char **p,
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const unsigned char *end,
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int *ver )
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{
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int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
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if( ( ret = mbedtls_asn1_get_int( p, end, ver ) ) != 0 )
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{
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if( ret == MBEDTLS_ERR_ASN1_UNEXPECTED_TAG )
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{
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*ver = 0;
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return( 0 );
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}
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return( MBEDTLS_ERROR_ADD( MBEDTLS_ERR_X509_INVALID_VERSION, ret ) );
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}
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return( 0 );
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}
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/*
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* X.509 CRL v2 extensions
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*
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* We currently don't parse any extension's content, but we do check that the
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* list of extensions is well-formed and abort on critical extensions (that
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* are unsupported as we don't support any extension so far)
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*/
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static int x509_get_crl_ext( unsigned char **p,
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const unsigned char *end,
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mbedtls_x509_buf *ext )
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{
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int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
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if( *p == end )
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return( 0 );
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/*
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* crlExtensions [0] EXPLICIT Extensions OPTIONAL
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* -- if present, version MUST be v2
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*/
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if( ( ret = mbedtls_x509_get_ext( p, end, ext, 0 ) ) != 0 )
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return( ret );
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end = ext->p + ext->len;
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while( *p < end )
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{
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/*
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* Extension ::= SEQUENCE {
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* extnID OBJECT IDENTIFIER,
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* critical BOOLEAN DEFAULT FALSE,
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* extnValue OCTET STRING }
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*/
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int is_critical = 0;
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const unsigned char *end_ext_data;
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size_t len;
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/* Get enclosing sequence tag */
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if( ( ret = mbedtls_asn1_get_tag( p, end, &len,
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MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE ) ) != 0 )
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return( MBEDTLS_ERROR_ADD( MBEDTLS_ERR_X509_INVALID_EXTENSIONS, ret ) );
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end_ext_data = *p + len;
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/* Get OID (currently ignored) */
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if( ( ret = mbedtls_asn1_get_tag( p, end_ext_data, &len,
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MBEDTLS_ASN1_OID ) ) != 0 )
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{
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return( MBEDTLS_ERROR_ADD( MBEDTLS_ERR_X509_INVALID_EXTENSIONS, ret ) );
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}
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*p += len;
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/* Get optional critical */
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if( ( ret = mbedtls_asn1_get_bool( p, end_ext_data,
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&is_critical ) ) != 0 &&
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( ret != MBEDTLS_ERR_ASN1_UNEXPECTED_TAG ) )
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{
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return( MBEDTLS_ERROR_ADD( MBEDTLS_ERR_X509_INVALID_EXTENSIONS, ret ) );
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}
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/* Data should be octet string type */
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if( ( ret = mbedtls_asn1_get_tag( p, end_ext_data, &len,
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MBEDTLS_ASN1_OCTET_STRING ) ) != 0 )
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return( MBEDTLS_ERROR_ADD( MBEDTLS_ERR_X509_INVALID_EXTENSIONS, ret ) );
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/* Ignore data so far and just check its length */
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*p += len;
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if( *p != end_ext_data )
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return( MBEDTLS_ERROR_ADD( MBEDTLS_ERR_X509_INVALID_EXTENSIONS,
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MBEDTLS_ERR_ASN1_LENGTH_MISMATCH ) );
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/* Abort on (unsupported) critical extensions */
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if( is_critical )
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return( MBEDTLS_ERROR_ADD( MBEDTLS_ERR_X509_INVALID_EXTENSIONS,
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MBEDTLS_ERR_ASN1_UNEXPECTED_TAG ) );
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}
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if( *p != end )
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return( MBEDTLS_ERROR_ADD( MBEDTLS_ERR_X509_INVALID_EXTENSIONS,
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MBEDTLS_ERR_ASN1_LENGTH_MISMATCH ) );
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return( 0 );
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}
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/*
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* X.509 CRL v2 entry extensions (no extensions parsed yet.)
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*/
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static int x509_get_crl_entry_ext( unsigned char **p,
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const unsigned char *end,
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mbedtls_x509_buf *ext )
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{
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int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
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size_t len = 0;
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/* OPTIONAL */
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if( end <= *p )
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return( 0 );
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ext->tag = **p;
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ext->p = *p;
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/*
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* Get CRL-entry extension sequence header
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* crlEntryExtensions Extensions OPTIONAL -- if present, MUST be v2
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*/
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if( ( ret = mbedtls_asn1_get_tag( p, end, &ext->len,
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MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE ) ) != 0 )
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{
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if( ret == MBEDTLS_ERR_ASN1_UNEXPECTED_TAG )
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{
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ext->p = NULL;
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return( 0 );
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}
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return( MBEDTLS_ERROR_ADD( MBEDTLS_ERR_X509_INVALID_EXTENSIONS, ret ) );
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}
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end = *p + ext->len;
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if( end != *p + ext->len )
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return( MBEDTLS_ERROR_ADD( MBEDTLS_ERR_X509_INVALID_EXTENSIONS,
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MBEDTLS_ERR_ASN1_LENGTH_MISMATCH ) );
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while( *p < end )
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{
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if( ( ret = mbedtls_asn1_get_tag( p, end, &len,
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MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE ) ) != 0 )
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return( MBEDTLS_ERROR_ADD( MBEDTLS_ERR_X509_INVALID_EXTENSIONS, ret ) );
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*p += len;
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}
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if( *p != end )
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return( MBEDTLS_ERROR_ADD( MBEDTLS_ERR_X509_INVALID_EXTENSIONS,
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MBEDTLS_ERR_ASN1_LENGTH_MISMATCH ) );
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return( 0 );
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}
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/*
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* X.509 CRL Entries
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*/
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static int x509_get_entries( unsigned char **p,
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const unsigned char *end,
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mbedtls_x509_crl_entry *entry )
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{
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int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
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size_t entry_len;
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mbedtls_x509_crl_entry *cur_entry = entry;
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if( *p == end )
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return( 0 );
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if( ( ret = mbedtls_asn1_get_tag( p, end, &entry_len,
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MBEDTLS_ASN1_SEQUENCE | MBEDTLS_ASN1_CONSTRUCTED ) ) != 0 )
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{
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if( ret == MBEDTLS_ERR_ASN1_UNEXPECTED_TAG )
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return( 0 );
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return( ret );
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}
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end = *p + entry_len;
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while( *p < end )
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{
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size_t len2;
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const unsigned char *end2;
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cur_entry->raw.tag = **p;
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if( ( ret = mbedtls_asn1_get_tag( p, end, &len2,
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MBEDTLS_ASN1_SEQUENCE | MBEDTLS_ASN1_CONSTRUCTED ) ) != 0 )
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{
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return( ret );
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}
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cur_entry->raw.p = *p;
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cur_entry->raw.len = len2;
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end2 = *p + len2;
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if( ( ret = mbedtls_x509_get_serial( p, end2, &cur_entry->serial ) ) != 0 )
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return( ret );
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if( ( ret = mbedtls_x509_get_time( p, end2,
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&cur_entry->revocation_date ) ) != 0 )
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return( ret );
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if( ( ret = x509_get_crl_entry_ext( p, end2,
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&cur_entry->entry_ext ) ) != 0 )
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return( ret );
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if( *p < end )
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{
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cur_entry->next = mbedtls_calloc( 1, sizeof( mbedtls_x509_crl_entry ) );
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if( cur_entry->next == NULL )
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return( MBEDTLS_ERR_X509_ALLOC_FAILED );
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cur_entry = cur_entry->next;
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}
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}
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return( 0 );
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}
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/*
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* Parse one CRLs in DER format and append it to the chained list
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*/
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int mbedtls_x509_crl_parse_der( mbedtls_x509_crl *chain,
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const unsigned char *buf, size_t buflen )
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{
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int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
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size_t len;
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unsigned char *p = NULL, *end = NULL;
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mbedtls_x509_buf sig_params1, sig_params2, sig_oid2;
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mbedtls_x509_crl *crl = chain;
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/*
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* Check for valid input
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*/
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if( crl == NULL || buf == NULL )
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return( MBEDTLS_ERR_X509_BAD_INPUT_DATA );
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memset( &sig_params1, 0, sizeof( mbedtls_x509_buf ) );
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memset( &sig_params2, 0, sizeof( mbedtls_x509_buf ) );
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memset( &sig_oid2, 0, sizeof( mbedtls_x509_buf ) );
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/*
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* Add new CRL on the end of the chain if needed.
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*/
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while( crl->version != 0 && crl->next != NULL )
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crl = crl->next;
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if( crl->version != 0 && crl->next == NULL )
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{
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crl->next = mbedtls_calloc( 1, sizeof( mbedtls_x509_crl ) );
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if( crl->next == NULL )
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{
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mbedtls_x509_crl_free( crl );
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return( MBEDTLS_ERR_X509_ALLOC_FAILED );
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}
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mbedtls_x509_crl_init( crl->next );
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crl = crl->next;
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}
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/*
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* Copy raw DER-encoded CRL
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*/
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if( buflen == 0 )
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return( MBEDTLS_ERR_X509_INVALID_FORMAT );
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p = mbedtls_calloc( 1, buflen );
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if( p == NULL )
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return( MBEDTLS_ERR_X509_ALLOC_FAILED );
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memcpy( p, buf, buflen );
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crl->raw.p = p;
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crl->raw.len = buflen;
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end = p + buflen;
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/*
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* CertificateList ::= SEQUENCE {
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* tbsCertList TBSCertList,
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* signatureAlgorithm AlgorithmIdentifier,
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* signatureValue BIT STRING }
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*/
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if( ( ret = mbedtls_asn1_get_tag( &p, end, &len,
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MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE ) ) != 0 )
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{
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mbedtls_x509_crl_free( crl );
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return( MBEDTLS_ERR_X509_INVALID_FORMAT );
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}
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if( len != (size_t) ( end - p ) )
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{
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mbedtls_x509_crl_free( crl );
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return( MBEDTLS_ERROR_ADD( MBEDTLS_ERR_X509_INVALID_FORMAT,
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MBEDTLS_ERR_ASN1_LENGTH_MISMATCH ) );
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}
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/*
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* TBSCertList ::= SEQUENCE {
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*/
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crl->tbs.p = p;
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if( ( ret = mbedtls_asn1_get_tag( &p, end, &len,
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MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE ) ) != 0 )
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{
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mbedtls_x509_crl_free( crl );
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return( MBEDTLS_ERROR_ADD( MBEDTLS_ERR_X509_INVALID_FORMAT, ret ) );
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}
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end = p + len;
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crl->tbs.len = end - crl->tbs.p;
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/*
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* Version ::= INTEGER OPTIONAL { v1(0), v2(1) }
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* -- if present, MUST be v2
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*
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* signature AlgorithmIdentifier
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*/
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if( ( ret = x509_crl_get_version( &p, end, &crl->version ) ) != 0 ||
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( ret = mbedtls_x509_get_alg( &p, end, &crl->sig_oid, &sig_params1 ) ) != 0 )
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{
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mbedtls_x509_crl_free( crl );
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return( ret );
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}
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if( crl->version < 0 || crl->version > 1 )
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{
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mbedtls_x509_crl_free( crl );
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return( MBEDTLS_ERR_X509_UNKNOWN_VERSION );
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}
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crl->version++;
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if( ( ret = mbedtls_x509_get_sig_alg( &crl->sig_oid, &sig_params1,
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&crl->sig_md, &crl->sig_pk,
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&crl->sig_opts ) ) != 0 )
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{
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mbedtls_x509_crl_free( crl );
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return( MBEDTLS_ERR_X509_UNKNOWN_SIG_ALG );
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}
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/*
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* issuer Name
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*/
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crl->issuer_raw.p = p;
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if( ( ret = mbedtls_asn1_get_tag( &p, end, &len,
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MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE ) ) != 0 )
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{
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mbedtls_x509_crl_free( crl );
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return( MBEDTLS_ERROR_ADD( MBEDTLS_ERR_X509_INVALID_FORMAT, ret ) );
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}
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if( ( ret = mbedtls_x509_get_name( &p, p + len, &crl->issuer ) ) != 0 )
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{
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mbedtls_x509_crl_free( crl );
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return( ret );
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}
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crl->issuer_raw.len = p - crl->issuer_raw.p;
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/*
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* thisUpdate Time
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* nextUpdate Time OPTIONAL
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*/
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if( ( ret = mbedtls_x509_get_time( &p, end, &crl->this_update ) ) != 0 )
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{
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mbedtls_x509_crl_free( crl );
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return( ret );
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}
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if( ( ret = mbedtls_x509_get_time( &p, end, &crl->next_update ) ) != 0 )
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{
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if( ret != ( MBEDTLS_ERROR_ADD( MBEDTLS_ERR_X509_INVALID_DATE,
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MBEDTLS_ERR_ASN1_UNEXPECTED_TAG ) ) &&
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ret != ( MBEDTLS_ERROR_ADD( MBEDTLS_ERR_X509_INVALID_DATE,
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MBEDTLS_ERR_ASN1_OUT_OF_DATA ) ) )
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{
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mbedtls_x509_crl_free( crl );
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return( ret );
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}
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}
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/*
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* revokedCertificates SEQUENCE OF SEQUENCE {
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* userCertificate CertificateSerialNumber,
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* revocationDate Time,
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* crlEntryExtensions Extensions OPTIONAL
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* -- if present, MUST be v2
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* } OPTIONAL
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*/
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if( ( ret = x509_get_entries( &p, end, &crl->entry ) ) != 0 )
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{
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mbedtls_x509_crl_free( crl );
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return( ret );
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}
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/*
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* crlExtensions EXPLICIT Extensions OPTIONAL
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* -- if present, MUST be v2
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*/
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if( crl->version == 2 )
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{
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ret = x509_get_crl_ext( &p, end, &crl->crl_ext );
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if( ret != 0 )
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{
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mbedtls_x509_crl_free( crl );
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return( ret );
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}
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}
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if( p != end )
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{
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mbedtls_x509_crl_free( crl );
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return( MBEDTLS_ERROR_ADD( MBEDTLS_ERR_X509_INVALID_FORMAT,
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MBEDTLS_ERR_ASN1_LENGTH_MISMATCH ) );
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}
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end = crl->raw.p + crl->raw.len;
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/*
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* signatureAlgorithm AlgorithmIdentifier,
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* signatureValue BIT STRING
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*/
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if( ( ret = mbedtls_x509_get_alg( &p, end, &sig_oid2, &sig_params2 ) ) != 0 )
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{
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mbedtls_x509_crl_free( crl );
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return( ret );
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}
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if( crl->sig_oid.len != sig_oid2.len ||
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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 */
|