[398] | 1 | /*
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| 2 | * X.509 Certidicate Revocation List (CRL) parsing
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| 3 | *
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| 4 | * Copyright (C) 2006-2015, ARM Limited, All Rights Reserved
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| 5 | * SPDX-License-Identifier: Apache-2.0
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| 6 | *
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| 7 | * Licensed under the Apache License, Version 2.0 (the "License"); you may
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| 8 | * not use this file except in compliance with the License.
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| 9 | * You may obtain a copy of the License at
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| 10 | *
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| 11 | * http://www.apache.org/licenses/LICENSE-2.0
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| 12 | *
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| 13 | * Unless required by applicable law or agreed to in writing, software
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| 14 | * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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| 15 | * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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| 16 | * See the License for the specific language governing permissions and
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| 17 | * limitations under the License.
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| 18 | *
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| 19 | * This file is part of mbed TLS (https://tls.mbed.org)
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| 20 | */
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| 21 | /*
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| 22 | * The ITU-T X.509 standard defines a certificate format for PKI.
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| 23 | *
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| 24 | * http://www.ietf.org/rfc/rfc5280.txt (Certificates and CRLs)
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| 25 | * http://www.ietf.org/rfc/rfc3279.txt (Alg IDs for CRLs)
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| 26 | * http://www.ietf.org/rfc/rfc2986.txt (CSRs, aka PKCS#10)
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| 27 | *
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| 28 | * http://www.itu.int/ITU-T/studygroups/com17/languages/X.680-0207.pdf
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| 29 | * http://www.itu.int/ITU-T/studygroups/com17/languages/X.690-0207.pdf
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| 30 | */
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| 31 |
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| 32 | #if !defined(MBEDTLS_CONFIG_FILE)
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| 33 | #include "mbedtls/config.h"
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| 34 | #else
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| 35 | #include MBEDTLS_CONFIG_FILE
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| 36 | #endif
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| 37 |
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| 38 | #if defined(MBEDTLS_X509_CRL_PARSE_C)
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| 39 |
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| 40 | #include "mbedtls/x509_crl.h"
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| 41 | #include "mbedtls/oid.h"
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| 42 | #include "mbedtls/platform_util.h"
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| 43 |
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| 44 | #include <string.h>
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| 45 |
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| 46 | #if defined(MBEDTLS_PEM_PARSE_C)
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| 47 | #include "mbedtls/pem.h"
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| 48 | #endif
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| 49 |
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| 50 | #if defined(MBEDTLS_PLATFORM_C)
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| 51 | #include "mbedtls/platform.h"
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| 52 | #else
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| 53 | #include <stdlib.h>
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| 54 | #include <stdio.h>
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| 55 | #define mbedtls_free free
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| 56 | #define mbedtls_calloc calloc
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| 57 | #define mbedtls_snprintf snprintf
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| 58 | #endif
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| 59 |
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| 60 | #if defined(_WIN32) && !defined(EFIX64) && !defined(EFI32)
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| 61 | #include <windows.h>
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| 62 | #else
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| 63 | #include <time.h>
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| 64 | #endif
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| 65 |
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| 66 | #if defined(MBEDTLS_FS_IO) || defined(EFIX64) || defined(EFI32)
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| 67 | #include <stdio.h>
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| 68 | #endif
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| 69 |
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| 70 | /*
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| 71 | * Version ::= INTEGER { v1(0), v2(1) }
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| 72 | */
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| 73 | static int x509_crl_get_version( unsigned char **p,
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| 74 | const unsigned char *end,
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| 75 | int *ver )
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| 76 | {
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| 77 | int ret;
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| 78 |
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| 79 | if( ( ret = mbedtls_asn1_get_int( p, end, ver ) ) != 0 )
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| 80 | {
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| 81 | if( ret == MBEDTLS_ERR_ASN1_UNEXPECTED_TAG )
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| 82 | {
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| 83 | *ver = 0;
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| 84 | return( 0 );
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| 85 | }
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| 86 |
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| 87 | return( MBEDTLS_ERR_X509_INVALID_VERSION + ret );
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| 88 | }
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| 89 |
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| 90 | return( 0 );
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| 91 | }
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| 92 |
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| 93 | /*
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| 94 | * X.509 CRL v2 extensions
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| 95 | *
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| 96 | * We currently don't parse any extension's content, but we do check that the
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| 97 | * list of extensions is well-formed and abort on critical extensions (that
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| 98 | * are unsupported as we don't support any extension so far)
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| 99 | */
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| 100 | static int x509_get_crl_ext( unsigned char **p,
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| 101 | const unsigned char *end,
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| 102 | mbedtls_x509_buf *ext )
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| 103 | {
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| 104 | int ret;
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| 105 |
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| 106 | /*
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| 107 | * crlExtensions [0] EXPLICIT Extensions OPTIONAL
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| 108 | * -- if present, version MUST be v2
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| 109 | */
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| 110 | if( ( ret = mbedtls_x509_get_ext( p, end, ext, 0 ) ) != 0 )
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| 111 | {
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| 112 | if( ret == MBEDTLS_ERR_ASN1_UNEXPECTED_TAG )
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| 113 | return( 0 );
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| 114 |
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| 115 | return( ret );
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| 116 | }
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| 117 |
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| 118 | while( *p < end )
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| 119 | {
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| 120 | /*
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| 121 | * Extension ::= SEQUENCE {
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| 122 | * extnID OBJECT IDENTIFIER,
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| 123 | * critical BOOLEAN DEFAULT FALSE,
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| 124 | * extnValue OCTET STRING }
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| 125 | */
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| 126 | int is_critical = 0;
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| 127 | const unsigned char *end_ext_data;
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| 128 | size_t len;
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| 129 |
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| 130 | /* Get enclosing sequence tag */
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| 131 | if( ( ret = mbedtls_asn1_get_tag( p, end, &len,
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| 132 | MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE ) ) != 0 )
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| 133 | return( MBEDTLS_ERR_X509_INVALID_EXTENSIONS + ret );
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| 134 |
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| 135 | end_ext_data = *p + len;
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| 136 |
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| 137 | /* Get OID (currently ignored) */
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| 138 | if( ( ret = mbedtls_asn1_get_tag( p, end_ext_data, &len,
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| 139 | MBEDTLS_ASN1_OID ) ) != 0 )
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| 140 | {
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| 141 | return( MBEDTLS_ERR_X509_INVALID_EXTENSIONS + ret );
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| 142 | }
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| 143 | *p += len;
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| 144 |
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| 145 | /* Get optional critical */
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| 146 | if( ( ret = mbedtls_asn1_get_bool( p, end_ext_data,
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| 147 | &is_critical ) ) != 0 &&
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| 148 | ( ret != MBEDTLS_ERR_ASN1_UNEXPECTED_TAG ) )
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| 149 | {
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| 150 | return( MBEDTLS_ERR_X509_INVALID_EXTENSIONS + ret );
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| 151 | }
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| 152 |
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| 153 | /* Data should be octet string type */
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| 154 | if( ( ret = mbedtls_asn1_get_tag( p, end_ext_data, &len,
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| 155 | MBEDTLS_ASN1_OCTET_STRING ) ) != 0 )
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| 156 | return( MBEDTLS_ERR_X509_INVALID_EXTENSIONS + ret );
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| 157 |
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| 158 | /* Ignore data so far and just check its length */
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| 159 | *p += len;
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| 160 | if( *p != end_ext_data )
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| 161 | return( MBEDTLS_ERR_X509_INVALID_EXTENSIONS +
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| 162 | MBEDTLS_ERR_ASN1_LENGTH_MISMATCH );
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| 163 |
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| 164 | /* Abort on (unsupported) critical extensions */
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| 165 | if( is_critical )
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| 166 | return( MBEDTLS_ERR_X509_INVALID_EXTENSIONS +
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| 167 | MBEDTLS_ERR_ASN1_UNEXPECTED_TAG );
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| 168 | }
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| 169 |
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| 170 | if( *p != end )
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| 171 | return( MBEDTLS_ERR_X509_INVALID_EXTENSIONS +
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| 172 | MBEDTLS_ERR_ASN1_LENGTH_MISMATCH );
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| 173 |
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| 174 | return( 0 );
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| 175 | }
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| 176 |
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| 177 | /*
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| 178 | * X.509 CRL v2 entry extensions (no extensions parsed yet.)
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| 179 | */
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| 180 | static int x509_get_crl_entry_ext( unsigned char **p,
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| 181 | const unsigned char *end,
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| 182 | mbedtls_x509_buf *ext )
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| 183 | {
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| 184 | int ret;
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| 185 | size_t len = 0;
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| 186 |
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| 187 | /* OPTIONAL */
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| 188 | if( end <= *p )
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| 189 | return( 0 );
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| 190 |
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| 191 | ext->tag = **p;
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| 192 | ext->p = *p;
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| 193 |
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| 194 | /*
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| 195 | * Get CRL-entry extension sequence header
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| 196 | * crlEntryExtensions Extensions OPTIONAL -- if present, MUST be v2
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| 197 | */
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| 198 | if( ( ret = mbedtls_asn1_get_tag( p, end, &ext->len,
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| 199 | MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE ) ) != 0 )
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| 200 | {
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| 201 | if( ret == MBEDTLS_ERR_ASN1_UNEXPECTED_TAG )
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| 202 | {
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| 203 | ext->p = NULL;
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| 204 | return( 0 );
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| 205 | }
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| 206 | return( MBEDTLS_ERR_X509_INVALID_EXTENSIONS + ret );
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| 207 | }
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| 208 |
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| 209 | end = *p + ext->len;
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| 210 |
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| 211 | if( end != *p + ext->len )
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| 212 | return( MBEDTLS_ERR_X509_INVALID_EXTENSIONS +
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| 213 | MBEDTLS_ERR_ASN1_LENGTH_MISMATCH );
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| 214 |
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| 215 | while( *p < end )
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| 216 | {
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| 217 | if( ( ret = mbedtls_asn1_get_tag( p, end, &len,
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| 218 | MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE ) ) != 0 )
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| 219 | return( MBEDTLS_ERR_X509_INVALID_EXTENSIONS + ret );
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| 220 |
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| 221 | *p += len;
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| 222 | }
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| 223 |
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| 224 | if( *p != end )
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| 225 | return( MBEDTLS_ERR_X509_INVALID_EXTENSIONS +
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| 226 | MBEDTLS_ERR_ASN1_LENGTH_MISMATCH );
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| 227 |
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| 228 | return( 0 );
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| 229 | }
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| 230 |
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| 231 | /*
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| 232 | * X.509 CRL Entries
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| 233 | */
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| 234 | static int x509_get_entries( unsigned char **p,
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| 235 | const unsigned char *end,
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| 236 | mbedtls_x509_crl_entry *entry )
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| 237 | {
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| 238 | int ret;
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| 239 | size_t entry_len;
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| 240 | mbedtls_x509_crl_entry *cur_entry = entry;
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| 241 |
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| 242 | if( *p == end )
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| 243 | return( 0 );
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| 244 |
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| 245 | if( ( ret = mbedtls_asn1_get_tag( p, end, &entry_len,
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| 246 | MBEDTLS_ASN1_SEQUENCE | MBEDTLS_ASN1_CONSTRUCTED ) ) != 0 )
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| 247 | {
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| 248 | if( ret == MBEDTLS_ERR_ASN1_UNEXPECTED_TAG )
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| 249 | return( 0 );
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| 250 |
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| 251 | return( ret );
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| 252 | }
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| 253 |
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| 254 | end = *p + entry_len;
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| 255 |
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| 256 | while( *p < end )
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| 257 | {
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| 258 | size_t len2;
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| 259 | const unsigned char *end2;
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| 260 |
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| 261 | if( ( ret = mbedtls_asn1_get_tag( p, end, &len2,
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| 262 | MBEDTLS_ASN1_SEQUENCE | MBEDTLS_ASN1_CONSTRUCTED ) ) != 0 )
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| 263 | {
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| 264 | return( ret );
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| 265 | }
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| 266 |
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| 267 | cur_entry->raw.tag = **p;
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| 268 | cur_entry->raw.p = *p;
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| 269 | cur_entry->raw.len = len2;
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| 270 | end2 = *p + len2;
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| 271 |
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| 272 | if( ( ret = mbedtls_x509_get_serial( p, end2, &cur_entry->serial ) ) != 0 )
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| 273 | return( ret );
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| 274 |
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| 275 | if( ( ret = mbedtls_x509_get_time( p, end2,
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| 276 | &cur_entry->revocation_date ) ) != 0 )
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| 277 | return( ret );
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| 278 |
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| 279 | if( ( ret = x509_get_crl_entry_ext( p, end2,
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| 280 | &cur_entry->entry_ext ) ) != 0 )
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| 281 | return( ret );
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| 282 |
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| 283 | if( *p < end )
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| 284 | {
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| 285 | cur_entry->next = mbedtls_calloc( 1, sizeof( mbedtls_x509_crl_entry ) );
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| 286 |
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| 287 | if( cur_entry->next == NULL )
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| 288 | return( MBEDTLS_ERR_X509_ALLOC_FAILED );
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| 289 |
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| 290 | cur_entry = cur_entry->next;
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| 291 | }
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| 292 | }
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| 293 |
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| 294 | return( 0 );
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| 295 | }
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| 296 |
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| 297 | /*
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| 298 | * Parse one CRLs in DER format and append it to the chained list
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| 299 | */
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| 300 | int mbedtls_x509_crl_parse_der( mbedtls_x509_crl *chain,
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| 301 | const unsigned char *buf, size_t buflen )
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| 302 | {
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| 303 | int ret;
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| 304 | size_t len;
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| 305 | unsigned char *p = NULL, *end = NULL;
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| 306 | mbedtls_x509_buf sig_params1, sig_params2, sig_oid2;
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| 307 | mbedtls_x509_crl *crl = chain;
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| 308 |
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| 309 | /*
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| 310 | * Check for valid input
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| 311 | */
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| 312 | if( crl == NULL || buf == NULL )
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| 313 | return( MBEDTLS_ERR_X509_BAD_INPUT_DATA );
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| 314 |
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| 315 | memset( &sig_params1, 0, sizeof( mbedtls_x509_buf ) );
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| 316 | memset( &sig_params2, 0, sizeof( mbedtls_x509_buf ) );
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| 317 | memset( &sig_oid2, 0, sizeof( mbedtls_x509_buf ) );
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| 318 |
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| 319 | /*
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| 320 | * Add new CRL on the end of the chain if needed.
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| 321 | */
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| 322 | while( crl->version != 0 && crl->next != NULL )
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| 323 | crl = crl->next;
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| 324 |
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| 325 | if( crl->version != 0 && crl->next == NULL )
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| 326 | {
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| 327 | crl->next = mbedtls_calloc( 1, sizeof( mbedtls_x509_crl ) );
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| 328 |
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| 329 | if( crl->next == NULL )
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| 330 | {
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| 331 | mbedtls_x509_crl_free( crl );
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| 332 | return( MBEDTLS_ERR_X509_ALLOC_FAILED );
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| 333 | }
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| 334 |
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| 335 | mbedtls_x509_crl_init( crl->next );
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| 336 | crl = crl->next;
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| 337 | }
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| 338 |
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| 339 | /*
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| 340 | * Copy raw DER-encoded CRL
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| 341 | */
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| 342 | if( buflen == 0 )
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| 343 | return( MBEDTLS_ERR_X509_INVALID_FORMAT );
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| 344 |
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| 345 | p = mbedtls_calloc( 1, buflen );
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| 346 | if( p == NULL )
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| 347 | return( MBEDTLS_ERR_X509_ALLOC_FAILED );
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| 348 |
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| 349 | memcpy( p, buf, buflen );
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| 350 |
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| 351 | crl->raw.p = p;
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| 352 | crl->raw.len = buflen;
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| 353 |
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| 354 | end = p + buflen;
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| 355 |
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| 356 | /*
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| 357 | * CertificateList ::= SEQUENCE {
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| 358 | * tbsCertList TBSCertList,
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| 359 | * signatureAlgorithm AlgorithmIdentifier,
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| 360 | * signatureValue BIT STRING }
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| 361 | */
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| 362 | if( ( ret = mbedtls_asn1_get_tag( &p, end, &len,
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| 363 | MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE ) ) != 0 )
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| 364 | {
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| 365 | mbedtls_x509_crl_free( crl );
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| 366 | return( MBEDTLS_ERR_X509_INVALID_FORMAT );
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| 367 | }
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| 368 |
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| 369 | if( len != (size_t) ( end - p ) )
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| 370 | {
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| 371 | mbedtls_x509_crl_free( crl );
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| 372 | return( MBEDTLS_ERR_X509_INVALID_FORMAT +
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| 373 | MBEDTLS_ERR_ASN1_LENGTH_MISMATCH );
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| 374 | }
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| 375 |
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| 376 | /*
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| 377 | * TBSCertList ::= SEQUENCE {
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| 378 | */
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| 379 | crl->tbs.p = p;
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| 380 |
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| 381 | if( ( ret = mbedtls_asn1_get_tag( &p, end, &len,
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| 382 | MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE ) ) != 0 )
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| 383 | {
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| 384 | mbedtls_x509_crl_free( crl );
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| 385 | return( MBEDTLS_ERR_X509_INVALID_FORMAT + ret );
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| 386 | }
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| 387 |
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| 388 | end = p + len;
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| 389 | crl->tbs.len = end - crl->tbs.p;
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| 390 |
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| 391 | /*
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| 392 | * Version ::= INTEGER OPTIONAL { v1(0), v2(1) }
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| 393 | * -- if present, MUST be v2
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| 394 | *
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| 395 | * signature AlgorithmIdentifier
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| 396 | */
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| 397 | if( ( ret = x509_crl_get_version( &p, end, &crl->version ) ) != 0 ||
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| 398 | ( ret = mbedtls_x509_get_alg( &p, end, &crl->sig_oid, &sig_params1 ) ) != 0 )
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| 399 | {
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| 400 | mbedtls_x509_crl_free( crl );
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| 401 | return( ret );
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| 402 | }
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| 403 |
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| 404 | if( crl->version < 0 || crl->version > 1 )
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| 405 | {
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| 406 | mbedtls_x509_crl_free( crl );
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| 407 | return( MBEDTLS_ERR_X509_UNKNOWN_VERSION );
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| 408 | }
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| 409 |
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| 410 | crl->version++;
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| 411 |
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| 412 | if( ( ret = mbedtls_x509_get_sig_alg( &crl->sig_oid, &sig_params1,
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| 413 | &crl->sig_md, &crl->sig_pk,
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| 414 | &crl->sig_opts ) ) != 0 )
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| 415 | {
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| 416 | mbedtls_x509_crl_free( crl );
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| 417 | return( MBEDTLS_ERR_X509_UNKNOWN_SIG_ALG );
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| 418 | }
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| 419 |
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| 420 | /*
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| 421 | * issuer Name
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| 422 | */
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| 423 | crl->issuer_raw.p = p;
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| 424 |
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| 425 | if( ( ret = mbedtls_asn1_get_tag( &p, end, &len,
|
---|
| 426 | MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE ) ) != 0 )
|
---|
| 427 | {
|
---|
| 428 | mbedtls_x509_crl_free( crl );
|
---|
| 429 | return( MBEDTLS_ERR_X509_INVALID_FORMAT + ret );
|
---|
| 430 | }
|
---|
| 431 |
|
---|
| 432 | if( ( ret = mbedtls_x509_get_name( &p, p + len, &crl->issuer ) ) != 0 )
|
---|
| 433 | {
|
---|
| 434 | mbedtls_x509_crl_free( crl );
|
---|
| 435 | return( ret );
|
---|
| 436 | }
|
---|
| 437 |
|
---|
| 438 | crl->issuer_raw.len = p - crl->issuer_raw.p;
|
---|
| 439 |
|
---|
| 440 | /*
|
---|
| 441 | * thisUpdate Time
|
---|
| 442 | * nextUpdate Time OPTIONAL
|
---|
| 443 | */
|
---|
| 444 | if( ( ret = mbedtls_x509_get_time( &p, end, &crl->this_update ) ) != 0 )
|
---|
| 445 | {
|
---|
| 446 | mbedtls_x509_crl_free( crl );
|
---|
| 447 | return( ret );
|
---|
| 448 | }
|
---|
| 449 |
|
---|
| 450 | if( ( ret = mbedtls_x509_get_time( &p, end, &crl->next_update ) ) != 0 )
|
---|
| 451 | {
|
---|
| 452 | if( ret != ( MBEDTLS_ERR_X509_INVALID_DATE +
|
---|
| 453 | MBEDTLS_ERR_ASN1_UNEXPECTED_TAG ) &&
|
---|
| 454 | ret != ( MBEDTLS_ERR_X509_INVALID_DATE +
|
---|
| 455 | MBEDTLS_ERR_ASN1_OUT_OF_DATA ) )
|
---|
| 456 | {
|
---|
| 457 | mbedtls_x509_crl_free( crl );
|
---|
| 458 | return( ret );
|
---|
| 459 | }
|
---|
| 460 | }
|
---|
| 461 |
|
---|
| 462 | /*
|
---|
| 463 | * revokedCertificates SEQUENCE OF SEQUENCE {
|
---|
| 464 | * userCertificate CertificateSerialNumber,
|
---|
| 465 | * revocationDate Time,
|
---|
| 466 | * crlEntryExtensions Extensions OPTIONAL
|
---|
| 467 | * -- if present, MUST be v2
|
---|
| 468 | * } OPTIONAL
|
---|
| 469 | */
|
---|
| 470 | if( ( ret = x509_get_entries( &p, end, &crl->entry ) ) != 0 )
|
---|
| 471 | {
|
---|
| 472 | mbedtls_x509_crl_free( crl );
|
---|
| 473 | return( ret );
|
---|
| 474 | }
|
---|
| 475 |
|
---|
| 476 | /*
|
---|
| 477 | * crlExtensions EXPLICIT Extensions OPTIONAL
|
---|
| 478 | * -- if present, MUST be v2
|
---|
| 479 | */
|
---|
| 480 | if( crl->version == 2 )
|
---|
| 481 | {
|
---|
| 482 | ret = x509_get_crl_ext( &p, end, &crl->crl_ext );
|
---|
| 483 |
|
---|
| 484 | if( ret != 0 )
|
---|
| 485 | {
|
---|
| 486 | mbedtls_x509_crl_free( crl );
|
---|
| 487 | return( ret );
|
---|
| 488 | }
|
---|
| 489 | }
|
---|
| 490 |
|
---|
| 491 | if( p != end )
|
---|
| 492 | {
|
---|
| 493 | mbedtls_x509_crl_free( crl );
|
---|
| 494 | return( MBEDTLS_ERR_X509_INVALID_FORMAT +
|
---|
| 495 | MBEDTLS_ERR_ASN1_LENGTH_MISMATCH );
|
---|
| 496 | }
|
---|
| 497 |
|
---|
| 498 | end = crl->raw.p + crl->raw.len;
|
---|
| 499 |
|
---|
| 500 | /*
|
---|
| 501 | * signatureAlgorithm AlgorithmIdentifier,
|
---|
| 502 | * signatureValue BIT STRING
|
---|
| 503 | */
|
---|
| 504 | if( ( ret = mbedtls_x509_get_alg( &p, end, &sig_oid2, &sig_params2 ) ) != 0 )
|
---|
| 505 | {
|
---|
| 506 | mbedtls_x509_crl_free( crl );
|
---|
| 507 | return( ret );
|
---|
| 508 | }
|
---|
| 509 |
|
---|
| 510 | if( crl->sig_oid.len != sig_oid2.len ||
|
---|
| 511 | memcmp( crl->sig_oid.p, sig_oid2.p, crl->sig_oid.len ) != 0 ||
|
---|
| 512 | sig_params1.len != sig_params2.len ||
|
---|
| 513 | ( sig_params1.len != 0 &&
|
---|
| 514 | memcmp( sig_params1.p, sig_params2.p, sig_params1.len ) != 0 ) )
|
---|
| 515 | {
|
---|
| 516 | mbedtls_x509_crl_free( crl );
|
---|
| 517 | return( MBEDTLS_ERR_X509_SIG_MISMATCH );
|
---|
| 518 | }
|
---|
| 519 |
|
---|
| 520 | if( ( ret = mbedtls_x509_get_sig( &p, end, &crl->sig ) ) != 0 )
|
---|
| 521 | {
|
---|
| 522 | mbedtls_x509_crl_free( crl );
|
---|
| 523 | return( ret );
|
---|
| 524 | }
|
---|
| 525 |
|
---|
| 526 | if( p != end )
|
---|
| 527 | {
|
---|
| 528 | mbedtls_x509_crl_free( crl );
|
---|
| 529 | return( MBEDTLS_ERR_X509_INVALID_FORMAT +
|
---|
| 530 | MBEDTLS_ERR_ASN1_LENGTH_MISMATCH );
|
---|
| 531 | }
|
---|
| 532 |
|
---|
| 533 | return( 0 );
|
---|
| 534 | }
|
---|
| 535 |
|
---|
| 536 | /*
|
---|
| 537 | * Parse one or more CRLs and add them to the chained list
|
---|
| 538 | */
|
---|
| 539 | int mbedtls_x509_crl_parse( mbedtls_x509_crl *chain, const unsigned char *buf, size_t buflen )
|
---|
| 540 | {
|
---|
| 541 | #if defined(MBEDTLS_PEM_PARSE_C)
|
---|
| 542 | int ret;
|
---|
| 543 | size_t use_len;
|
---|
| 544 | mbedtls_pem_context pem;
|
---|
| 545 | int is_pem = 0;
|
---|
| 546 |
|
---|
| 547 | if( chain == NULL || buf == NULL )
|
---|
| 548 | return( MBEDTLS_ERR_X509_BAD_INPUT_DATA );
|
---|
| 549 |
|
---|
| 550 | do
|
---|
| 551 | {
|
---|
| 552 | mbedtls_pem_init( &pem );
|
---|
| 553 |
|
---|
| 554 | // Avoid calling mbedtls_pem_read_buffer() on non-null-terminated
|
---|
| 555 | // string
|
---|
| 556 | if( buflen == 0 || buf[buflen - 1] != '\0' )
|
---|
| 557 | ret = MBEDTLS_ERR_PEM_NO_HEADER_FOOTER_PRESENT;
|
---|
| 558 | else
|
---|
| 559 | ret = mbedtls_pem_read_buffer( &pem,
|
---|
| 560 | "-----BEGIN X509 CRL-----",
|
---|
| 561 | "-----END X509 CRL-----",
|
---|
| 562 | buf, NULL, 0, &use_len );
|
---|
| 563 |
|
---|
| 564 | if( ret == 0 )
|
---|
| 565 | {
|
---|
| 566 | /*
|
---|
| 567 | * Was PEM encoded
|
---|
| 568 | */
|
---|
| 569 | is_pem = 1;
|
---|
| 570 |
|
---|
| 571 | buflen -= use_len;
|
---|
| 572 | buf += use_len;
|
---|
| 573 |
|
---|
| 574 | if( ( ret = mbedtls_x509_crl_parse_der( chain,
|
---|
| 575 | pem.buf, pem.buflen ) ) != 0 )
|
---|
| 576 | {
|
---|
| 577 | mbedtls_pem_free( &pem );
|
---|
| 578 | return( ret );
|
---|
| 579 | }
|
---|
| 580 | }
|
---|
| 581 | else if( is_pem )
|
---|
| 582 | {
|
---|
| 583 | mbedtls_pem_free( &pem );
|
---|
| 584 | return( ret );
|
---|
| 585 | }
|
---|
| 586 |
|
---|
| 587 | mbedtls_pem_free( &pem );
|
---|
| 588 | }
|
---|
| 589 | /* In the PEM case, buflen is 1 at the end, for the terminated NULL byte.
|
---|
| 590 | * And a valid CRL cannot be less than 1 byte anyway. */
|
---|
| 591 | while( is_pem && buflen > 1 );
|
---|
| 592 |
|
---|
| 593 | if( is_pem )
|
---|
| 594 | return( 0 );
|
---|
| 595 | else
|
---|
| 596 | #endif /* MBEDTLS_PEM_PARSE_C */
|
---|
| 597 | return( mbedtls_x509_crl_parse_der( chain, buf, buflen ) );
|
---|
| 598 | }
|
---|
| 599 |
|
---|
| 600 | #if defined(MBEDTLS_FS_IO)
|
---|
| 601 | /*
|
---|
| 602 | * Load one or more CRLs and add them to the chained list
|
---|
| 603 | */
|
---|
| 604 | int mbedtls_x509_crl_parse_file( mbedtls_x509_crl *chain, const char *path )
|
---|
| 605 | {
|
---|
| 606 | int ret;
|
---|
| 607 | size_t n;
|
---|
| 608 | unsigned char *buf;
|
---|
| 609 |
|
---|
| 610 | if( ( ret = mbedtls_pk_load_file( path, &buf, &n ) ) != 0 )
|
---|
| 611 | return( ret );
|
---|
| 612 |
|
---|
| 613 | ret = mbedtls_x509_crl_parse( chain, buf, n );
|
---|
| 614 |
|
---|
| 615 | mbedtls_platform_zeroize( buf, n );
|
---|
| 616 | mbedtls_free( buf );
|
---|
| 617 |
|
---|
| 618 | return( ret );
|
---|
| 619 | }
|
---|
| 620 | #endif /* MBEDTLS_FS_IO */
|
---|
| 621 |
|
---|
| 622 | /*
|
---|
| 623 | * Return an informational string about the certificate.
|
---|
| 624 | */
|
---|
| 625 | #define BEFORE_COLON 14
|
---|
| 626 | #define BC "14"
|
---|
| 627 | /*
|
---|
| 628 | * Return an informational string about the CRL.
|
---|
| 629 | */
|
---|
| 630 | int mbedtls_x509_crl_info( char *buf, size_t size, const char *prefix,
|
---|
| 631 | const mbedtls_x509_crl *crl )
|
---|
| 632 | {
|
---|
| 633 | int ret;
|
---|
| 634 | size_t n;
|
---|
| 635 | char *p;
|
---|
| 636 | const mbedtls_x509_crl_entry *entry;
|
---|
| 637 |
|
---|
| 638 | p = buf;
|
---|
| 639 | n = size;
|
---|
| 640 |
|
---|
| 641 | ret = mbedtls_snprintf( p, n, "%sCRL version : %d",
|
---|
| 642 | prefix, crl->version );
|
---|
| 643 | MBEDTLS_X509_SAFE_SNPRINTF;
|
---|
| 644 |
|
---|
| 645 | ret = mbedtls_snprintf( p, n, "\n%sissuer name : ", prefix );
|
---|
| 646 | MBEDTLS_X509_SAFE_SNPRINTF;
|
---|
| 647 | ret = mbedtls_x509_dn_gets( p, n, &crl->issuer );
|
---|
| 648 | MBEDTLS_X509_SAFE_SNPRINTF;
|
---|
| 649 |
|
---|
| 650 | ret = mbedtls_snprintf( p, n, "\n%sthis update : " \
|
---|
| 651 | "%04d-%02d-%02d %02d:%02d:%02d", prefix,
|
---|
| 652 | crl->this_update.year, crl->this_update.mon,
|
---|
| 653 | crl->this_update.day, crl->this_update.hour,
|
---|
| 654 | crl->this_update.min, crl->this_update.sec );
|
---|
| 655 | MBEDTLS_X509_SAFE_SNPRINTF;
|
---|
| 656 |
|
---|
| 657 | ret = mbedtls_snprintf( p, n, "\n%snext update : " \
|
---|
| 658 | "%04d-%02d-%02d %02d:%02d:%02d", prefix,
|
---|
| 659 | crl->next_update.year, crl->next_update.mon,
|
---|
| 660 | crl->next_update.day, crl->next_update.hour,
|
---|
| 661 | crl->next_update.min, crl->next_update.sec );
|
---|
| 662 | MBEDTLS_X509_SAFE_SNPRINTF;
|
---|
| 663 |
|
---|
| 664 | entry = &crl->entry;
|
---|
| 665 |
|
---|
| 666 | ret = mbedtls_snprintf( p, n, "\n%sRevoked certificates:",
|
---|
| 667 | prefix );
|
---|
| 668 | MBEDTLS_X509_SAFE_SNPRINTF;
|
---|
| 669 |
|
---|
| 670 | while( entry != NULL && entry->raw.len != 0 )
|
---|
| 671 | {
|
---|
| 672 | ret = mbedtls_snprintf( p, n, "\n%sserial number: ",
|
---|
| 673 | prefix );
|
---|
| 674 | MBEDTLS_X509_SAFE_SNPRINTF;
|
---|
| 675 |
|
---|
| 676 | ret = mbedtls_x509_serial_gets( p, n, &entry->serial );
|
---|
| 677 | MBEDTLS_X509_SAFE_SNPRINTF;
|
---|
| 678 |
|
---|
| 679 | ret = mbedtls_snprintf( p, n, " revocation date: " \
|
---|
| 680 | "%04d-%02d-%02d %02d:%02d:%02d",
|
---|
| 681 | entry->revocation_date.year, entry->revocation_date.mon,
|
---|
| 682 | entry->revocation_date.day, entry->revocation_date.hour,
|
---|
| 683 | entry->revocation_date.min, entry->revocation_date.sec );
|
---|
| 684 | MBEDTLS_X509_SAFE_SNPRINTF;
|
---|
| 685 |
|
---|
| 686 | entry = entry->next;
|
---|
| 687 | }
|
---|
| 688 |
|
---|
| 689 | ret = mbedtls_snprintf( p, n, "\n%ssigned using : ", prefix );
|
---|
| 690 | MBEDTLS_X509_SAFE_SNPRINTF;
|
---|
| 691 |
|
---|
| 692 | ret = mbedtls_x509_sig_alg_gets( p, n, &crl->sig_oid, crl->sig_pk, crl->sig_md,
|
---|
| 693 | crl->sig_opts );
|
---|
| 694 | MBEDTLS_X509_SAFE_SNPRINTF;
|
---|
| 695 |
|
---|
| 696 | ret = mbedtls_snprintf( p, n, "\n" );
|
---|
| 697 | MBEDTLS_X509_SAFE_SNPRINTF;
|
---|
| 698 |
|
---|
| 699 | return( (int) ( size - n ) );
|
---|
| 700 | }
|
---|
| 701 |
|
---|
| 702 | /*
|
---|
| 703 | * Initialize a CRL chain
|
---|
| 704 | */
|
---|
| 705 | void mbedtls_x509_crl_init( mbedtls_x509_crl *crl )
|
---|
| 706 | {
|
---|
| 707 | memset( crl, 0, sizeof(mbedtls_x509_crl) );
|
---|
| 708 | }
|
---|
| 709 |
|
---|
| 710 | /*
|
---|
| 711 | * Unallocate all CRL data
|
---|
| 712 | */
|
---|
| 713 | void mbedtls_x509_crl_free( mbedtls_x509_crl *crl )
|
---|
| 714 | {
|
---|
| 715 | mbedtls_x509_crl *crl_cur = crl;
|
---|
| 716 | mbedtls_x509_crl *crl_prv;
|
---|
| 717 | mbedtls_x509_name *name_cur;
|
---|
| 718 | mbedtls_x509_name *name_prv;
|
---|
| 719 | mbedtls_x509_crl_entry *entry_cur;
|
---|
| 720 | mbedtls_x509_crl_entry *entry_prv;
|
---|
| 721 |
|
---|
| 722 | if( crl == NULL )
|
---|
| 723 | return;
|
---|
| 724 |
|
---|
| 725 | do
|
---|
| 726 | {
|
---|
| 727 | #if defined(MBEDTLS_X509_RSASSA_PSS_SUPPORT)
|
---|
| 728 | mbedtls_free( crl_cur->sig_opts );
|
---|
| 729 | #endif
|
---|
| 730 |
|
---|
| 731 | name_cur = crl_cur->issuer.next;
|
---|
| 732 | while( name_cur != NULL )
|
---|
| 733 | {
|
---|
| 734 | name_prv = name_cur;
|
---|
| 735 | name_cur = name_cur->next;
|
---|
| 736 | mbedtls_platform_zeroize( name_prv, sizeof( mbedtls_x509_name ) );
|
---|
| 737 | mbedtls_free( name_prv );
|
---|
| 738 | }
|
---|
| 739 |
|
---|
| 740 | entry_cur = crl_cur->entry.next;
|
---|
| 741 | while( entry_cur != NULL )
|
---|
| 742 | {
|
---|
| 743 | entry_prv = entry_cur;
|
---|
| 744 | entry_cur = entry_cur->next;
|
---|
| 745 | mbedtls_platform_zeroize( entry_prv,
|
---|
| 746 | sizeof( mbedtls_x509_crl_entry ) );
|
---|
| 747 | mbedtls_free( entry_prv );
|
---|
| 748 | }
|
---|
| 749 |
|
---|
| 750 | if( crl_cur->raw.p != NULL )
|
---|
| 751 | {
|
---|
| 752 | mbedtls_platform_zeroize( crl_cur->raw.p, crl_cur->raw.len );
|
---|
| 753 | mbedtls_free( crl_cur->raw.p );
|
---|
| 754 | }
|
---|
| 755 |
|
---|
| 756 | crl_cur = crl_cur->next;
|
---|
| 757 | }
|
---|
| 758 | while( crl_cur != NULL );
|
---|
| 759 |
|
---|
| 760 | crl_cur = crl;
|
---|
| 761 | do
|
---|
| 762 | {
|
---|
| 763 | crl_prv = crl_cur;
|
---|
| 764 | crl_cur = crl_cur->next;
|
---|
| 765 |
|
---|
| 766 | mbedtls_platform_zeroize( crl_prv, sizeof( mbedtls_x509_crl ) );
|
---|
| 767 | if( crl_prv != crl )
|
---|
| 768 | mbedtls_free( crl_prv );
|
---|
| 769 | }
|
---|
| 770 | while( crl_cur != NULL );
|
---|
| 771 | }
|
---|
| 772 |
|
---|
| 773 | #endif /* MBEDTLS_X509_CRL_PARSE_C */
|
---|