+++ /dev/null
-/*
- * X.509 certificate parsing and verification
- *
- * Copyright (C) 2006-2015, ARM Limited, All Rights Reserved
- * SPDX-License-Identifier: GPL-2.0
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License along
- * with this program; if not, write to the Free Software Foundation, Inc.,
- * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
- *
- * This file is part of mbed TLS (https://tls.mbed.org)
- */
-/*
- * The ITU-T X.509 standard defines a certificate format for PKI.
- *
- * http://www.ietf.org/rfc/rfc5280.txt (Certificates and CRLs)
- * http://www.ietf.org/rfc/rfc3279.txt (Alg IDs for CRLs)
- * http://www.ietf.org/rfc/rfc2986.txt (CSRs, aka PKCS#10)
- *
- * http://www.itu.int/ITU-T/studygroups/com17/languages/X.680-0207.pdf
- * http://www.itu.int/ITU-T/studygroups/com17/languages/X.690-0207.pdf
- */
-
-#if !defined(MBEDTLS_CONFIG_FILE)
-#include "mbedtls/config.h"
-#else
-#include MBEDTLS_CONFIG_FILE
-#endif
-
-#if defined(MBEDTLS_X509_CRT_PARSE_C)
-
-#include "mbedtls/x509_crt.h"
-#include "mbedtls/oid.h"
-
-#include <stdio.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>
-#define mbedtls_free free
-#define mbedtls_calloc calloc
-#define mbedtls_snprintf snprintf
-#endif
-
-#if defined(MBEDTLS_THREADING_C)
-#include "mbedtls/threading.h"
-#endif
-
-#if defined(_WIN32) && !defined(EFIX64) && !defined(EFI32)
-#include <windows.h>
-#else
-#include <time.h>
-#endif
-
-#if defined(MBEDTLS_FS_IO)
-#include <stdio.h>
-#if !defined(_WIN32) || defined(EFIX64) || defined(EFI32)
-#include <sys/types.h>
-#include <sys/stat.h>
-#include <dirent.h>
-#endif /* !_WIN32 || EFIX64 || EFI32 */
-#endif
-
-/* Implementation that should never be optimized out by the compiler */
-static void mbedtls_zeroize( void *v, size_t n ) {
- volatile unsigned char *p = v; while( n-- ) *p++ = 0;
-}
-
-/*
- * Default profile
- */
-const mbedtls_x509_crt_profile mbedtls_x509_crt_profile_default =
-{
-#if defined(MBEDTLS_TLS_DEFAULT_ALLOW_SHA1_IN_CERTIFICATES)
- /* Allow SHA-1 (weak, but still safe in controlled environments) */
- MBEDTLS_X509_ID_FLAG( MBEDTLS_MD_SHA1 ) |
-#endif
- /* Only SHA-2 hashes */
- MBEDTLS_X509_ID_FLAG( MBEDTLS_MD_SHA224 ) |
- MBEDTLS_X509_ID_FLAG( MBEDTLS_MD_SHA256 ) |
- MBEDTLS_X509_ID_FLAG( MBEDTLS_MD_SHA384 ) |
- MBEDTLS_X509_ID_FLAG( MBEDTLS_MD_SHA512 ),
- 0xFFFFFFF, /* Any PK alg */
- 0xFFFFFFF, /* Any curve */
- 2048,
-};
-
-/*
- * Next-default profile
- */
-const mbedtls_x509_crt_profile mbedtls_x509_crt_profile_next =
-{
- /* Hashes from SHA-256 and above */
- MBEDTLS_X509_ID_FLAG( MBEDTLS_MD_SHA256 ) |
- MBEDTLS_X509_ID_FLAG( MBEDTLS_MD_SHA384 ) |
- MBEDTLS_X509_ID_FLAG( MBEDTLS_MD_SHA512 ),
- 0xFFFFFFF, /* Any PK alg */
-#if defined(MBEDTLS_ECP_C)
- /* Curves at or above 128-bit security level */
- MBEDTLS_X509_ID_FLAG( MBEDTLS_ECP_DP_SECP256R1 ) |
- MBEDTLS_X509_ID_FLAG( MBEDTLS_ECP_DP_SECP384R1 ) |
- MBEDTLS_X509_ID_FLAG( MBEDTLS_ECP_DP_SECP521R1 ) |
- MBEDTLS_X509_ID_FLAG( MBEDTLS_ECP_DP_BP256R1 ) |
- MBEDTLS_X509_ID_FLAG( MBEDTLS_ECP_DP_BP384R1 ) |
- MBEDTLS_X509_ID_FLAG( MBEDTLS_ECP_DP_BP512R1 ) |
- MBEDTLS_X509_ID_FLAG( MBEDTLS_ECP_DP_SECP256K1 ),
-#else
- 0,
-#endif
- 2048,
-};
-
-/*
- * NSA Suite B Profile
- */
-const mbedtls_x509_crt_profile mbedtls_x509_crt_profile_suiteb =
-{
- /* Only SHA-256 and 384 */
- MBEDTLS_X509_ID_FLAG( MBEDTLS_MD_SHA256 ) |
- MBEDTLS_X509_ID_FLAG( MBEDTLS_MD_SHA384 ),
- /* Only ECDSA */
- MBEDTLS_X509_ID_FLAG( MBEDTLS_PK_ECDSA ),
-#if defined(MBEDTLS_ECP_C)
- /* Only NIST P-256 and P-384 */
- MBEDTLS_X509_ID_FLAG( MBEDTLS_ECP_DP_SECP256R1 ) |
- MBEDTLS_X509_ID_FLAG( MBEDTLS_ECP_DP_SECP384R1 ),
-#else
- 0,
-#endif
- 0,
-};
-
-/*
- * Check md_alg against profile
- * Return 0 if md_alg acceptable for this profile, -1 otherwise
- */
-static int x509_profile_check_md_alg( const mbedtls_x509_crt_profile *profile,
- mbedtls_md_type_t md_alg )
-{
- if( ( profile->allowed_mds & MBEDTLS_X509_ID_FLAG( md_alg ) ) != 0 )
- return( 0 );
-
- return( -1 );
-}
-
-/*
- * Check pk_alg against profile
- * Return 0 if pk_alg acceptable for this profile, -1 otherwise
- */
-static int x509_profile_check_pk_alg( const mbedtls_x509_crt_profile *profile,
- mbedtls_pk_type_t pk_alg )
-{
- if( ( profile->allowed_pks & MBEDTLS_X509_ID_FLAG( pk_alg ) ) != 0 )
- return( 0 );
-
- return( -1 );
-}
-
-/*
- * Check key against profile
- * Return 0 if pk_alg acceptable for this profile, -1 otherwise
- */
-static int x509_profile_check_key( const mbedtls_x509_crt_profile *profile,
- mbedtls_pk_type_t pk_alg,
- const mbedtls_pk_context *pk )
-{
-#if defined(MBEDTLS_RSA_C)
- if( pk_alg == MBEDTLS_PK_RSA || pk_alg == MBEDTLS_PK_RSASSA_PSS )
- {
- if( mbedtls_pk_get_bitlen( pk ) >= profile->rsa_min_bitlen )
- return( 0 );
-
- return( -1 );
- }
-#endif
-
-#if defined(MBEDTLS_ECP_C)
- if( pk_alg == MBEDTLS_PK_ECDSA ||
- pk_alg == MBEDTLS_PK_ECKEY ||
- pk_alg == MBEDTLS_PK_ECKEY_DH )
- {
- mbedtls_ecp_group_id gid = mbedtls_pk_ec( *pk )->grp.id;
-
- if( ( profile->allowed_curves & MBEDTLS_X509_ID_FLAG( gid ) ) != 0 )
- return( 0 );
-
- return( -1 );
- }
-#endif
-
- return( -1 );
-}
-
-/*
- * Version ::= INTEGER { v1(0), v2(1), v3(2) }
- */
-static int x509_get_version( unsigned char **p,
- const unsigned char *end,
- int *ver )
-{
- int ret;
- size_t len;
-
- if( ( ret = mbedtls_asn1_get_tag( p, end, &len,
- MBEDTLS_ASN1_CONTEXT_SPECIFIC | MBEDTLS_ASN1_CONSTRUCTED | 0 ) ) != 0 )
- {
- if( ret == MBEDTLS_ERR_ASN1_UNEXPECTED_TAG )
- {
- *ver = 0;
- return( 0 );
- }
-
- return( ret );
- }
-
- end = *p + len;
-
- if( ( ret = mbedtls_asn1_get_int( p, end, ver ) ) != 0 )
- return( MBEDTLS_ERR_X509_INVALID_VERSION + ret );
-
- if( *p != end )
- return( MBEDTLS_ERR_X509_INVALID_VERSION +
- MBEDTLS_ERR_ASN1_LENGTH_MISMATCH );
-
- return( 0 );
-}
-
-/*
- * Validity ::= SEQUENCE {
- * notBefore Time,
- * notAfter Time }
- */
-static int x509_get_dates( unsigned char **p,
- const unsigned char *end,
- mbedtls_x509_time *from,
- mbedtls_x509_time *to )
-{
- int ret;
- size_t len;
-
- if( ( ret = mbedtls_asn1_get_tag( p, end, &len,
- MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE ) ) != 0 )
- return( MBEDTLS_ERR_X509_INVALID_DATE + ret );
-
- end = *p + len;
-
- if( ( ret = mbedtls_x509_get_time( p, end, from ) ) != 0 )
- return( ret );
-
- if( ( ret = mbedtls_x509_get_time( p, end, to ) ) != 0 )
- return( ret );
-
- if( *p != end )
- return( MBEDTLS_ERR_X509_INVALID_DATE +
- MBEDTLS_ERR_ASN1_LENGTH_MISMATCH );
-
- return( 0 );
-}
-
-/*
- * X.509 v2/v3 unique identifier (not parsed)
- */
-static int x509_get_uid( unsigned char **p,
- const unsigned char *end,
- mbedtls_x509_buf *uid, int n )
-{
- int ret;
-
- if( *p == end )
- return( 0 );
-
- uid->tag = **p;
-
- if( ( ret = mbedtls_asn1_get_tag( p, end, &uid->len,
- MBEDTLS_ASN1_CONTEXT_SPECIFIC | MBEDTLS_ASN1_CONSTRUCTED | n ) ) != 0 )
- {
- if( ret == MBEDTLS_ERR_ASN1_UNEXPECTED_TAG )
- return( 0 );
-
- return( ret );
- }
-
- uid->p = *p;
- *p += uid->len;
-
- return( 0 );
-}
-
-static int x509_get_basic_constraints( unsigned char **p,
- const unsigned char *end,
- int *ca_istrue,
- int *max_pathlen )
-{
- int ret;
- size_t len;
-
- /*
- * BasicConstraints ::= SEQUENCE {
- * cA BOOLEAN DEFAULT FALSE,
- * pathLenConstraint INTEGER (0..MAX) OPTIONAL }
- */
- *ca_istrue = 0; /* DEFAULT FALSE */
- *max_pathlen = 0; /* endless */
-
- if( ( ret = mbedtls_asn1_get_tag( p, end, &len,
- MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE ) ) != 0 )
- return( MBEDTLS_ERR_X509_INVALID_EXTENSIONS + ret );
-
- if( *p == end )
- return( 0 );
-
- if( ( ret = mbedtls_asn1_get_bool( p, end, ca_istrue ) ) != 0 )
- {
- if( ret == MBEDTLS_ERR_ASN1_UNEXPECTED_TAG )
- ret = mbedtls_asn1_get_int( p, end, ca_istrue );
-
- if( ret != 0 )
- return( MBEDTLS_ERR_X509_INVALID_EXTENSIONS + ret );
-
- if( *ca_istrue != 0 )
- *ca_istrue = 1;
- }
-
- if( *p == end )
- return( 0 );
-
- if( ( ret = mbedtls_asn1_get_int( p, end, max_pathlen ) ) != 0 )
- return( MBEDTLS_ERR_X509_INVALID_EXTENSIONS + ret );
-
- if( *p != end )
- return( MBEDTLS_ERR_X509_INVALID_EXTENSIONS +
- MBEDTLS_ERR_ASN1_LENGTH_MISMATCH );
-
- (*max_pathlen)++;
-
- return( 0 );
-}
-
-static int x509_get_ns_cert_type( unsigned char **p,
- const unsigned char *end,
- unsigned char *ns_cert_type)
-{
- int ret;
- mbedtls_x509_bitstring bs = { 0, 0, NULL };
-
- if( ( ret = mbedtls_asn1_get_bitstring( p, end, &bs ) ) != 0 )
- return( MBEDTLS_ERR_X509_INVALID_EXTENSIONS + ret );
-
- if( bs.len != 1 )
- return( MBEDTLS_ERR_X509_INVALID_EXTENSIONS +
- MBEDTLS_ERR_ASN1_INVALID_LENGTH );
-
- /* Get actual bitstring */
- *ns_cert_type = *bs.p;
- return( 0 );
-}
-
-static int x509_get_key_usage( unsigned char **p,
- const unsigned char *end,
- unsigned int *key_usage)
-{
- int ret;
- size_t i;
- mbedtls_x509_bitstring bs = { 0, 0, NULL };
-
- if( ( ret = mbedtls_asn1_get_bitstring( p, end, &bs ) ) != 0 )
- return( MBEDTLS_ERR_X509_INVALID_EXTENSIONS + ret );
-
- if( bs.len < 1 )
- return( MBEDTLS_ERR_X509_INVALID_EXTENSIONS +
- MBEDTLS_ERR_ASN1_INVALID_LENGTH );
-
- /* Get actual bitstring */
- *key_usage = 0;
- for( i = 0; i < bs.len && i < sizeof( unsigned int ); i++ )
- {
- *key_usage |= (unsigned int) bs.p[i] << (8*i);
- }
-
- return( 0 );
-}
-
-/*
- * ExtKeyUsageSyntax ::= SEQUENCE SIZE (1..MAX) OF KeyPurposeId
- *
- * KeyPurposeId ::= OBJECT IDENTIFIER
- */
-static int x509_get_ext_key_usage( unsigned char **p,
- const unsigned char *end,
- mbedtls_x509_sequence *ext_key_usage)
-{
- int ret;
-
- if( ( ret = mbedtls_asn1_get_sequence_of( p, end, ext_key_usage, MBEDTLS_ASN1_OID ) ) != 0 )
- return( MBEDTLS_ERR_X509_INVALID_EXTENSIONS + ret );
-
- /* Sequence length must be >= 1 */
- if( ext_key_usage->buf.p == NULL )
- return( MBEDTLS_ERR_X509_INVALID_EXTENSIONS +
- MBEDTLS_ERR_ASN1_INVALID_LENGTH );
-
- return( 0 );
-}
-
-/*
- * SubjectAltName ::= GeneralNames
- *
- * GeneralNames ::= SEQUENCE SIZE (1..MAX) OF GeneralName
- *
- * GeneralName ::= CHOICE {
- * otherName [0] OtherName,
- * rfc822Name [1] IA5String,
- * dNSName [2] IA5String,
- * x400Address [3] ORAddress,
- * directoryName [4] Name,
- * ediPartyName [5] EDIPartyName,
- * uniformResourceIdentifier [6] IA5String,
- * iPAddress [7] OCTET STRING,
- * registeredID [8] OBJECT IDENTIFIER }
- *
- * OtherName ::= SEQUENCE {
- * type-id OBJECT IDENTIFIER,
- * value [0] EXPLICIT ANY DEFINED BY type-id }
- *
- * EDIPartyName ::= SEQUENCE {
- * nameAssigner [0] DirectoryString OPTIONAL,
- * partyName [1] DirectoryString }
- *
- * NOTE: we only parse and use dNSName at this point.
- */
-static int x509_get_subject_alt_name( unsigned char **p,
- const unsigned char *end,
- mbedtls_x509_sequence *subject_alt_name )
-{
- int ret;
- size_t len, tag_len;
- mbedtls_asn1_buf *buf;
- unsigned char tag;
- mbedtls_asn1_sequence *cur = subject_alt_name;
-
- /* Get main sequence tag */
- if( ( ret = mbedtls_asn1_get_tag( p, end, &len,
- MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE ) ) != 0 )
- return( MBEDTLS_ERR_X509_INVALID_EXTENSIONS + ret );
-
- if( *p + len != end )
- return( MBEDTLS_ERR_X509_INVALID_EXTENSIONS +
- MBEDTLS_ERR_ASN1_LENGTH_MISMATCH );
-
- while( *p < end )
- {
- if( ( end - *p ) < 1 )
- return( MBEDTLS_ERR_X509_INVALID_EXTENSIONS +
- MBEDTLS_ERR_ASN1_OUT_OF_DATA );
-
- tag = **p;
- (*p)++;
- if( ( ret = mbedtls_asn1_get_len( p, end, &tag_len ) ) != 0 )
- return( MBEDTLS_ERR_X509_INVALID_EXTENSIONS + ret );
-
- if( ( tag & MBEDTLS_ASN1_CONTEXT_SPECIFIC ) != MBEDTLS_ASN1_CONTEXT_SPECIFIC )
- return( MBEDTLS_ERR_X509_INVALID_EXTENSIONS +
- MBEDTLS_ERR_ASN1_UNEXPECTED_TAG );
-
- /* Skip everything but DNS name */
- if( tag != ( MBEDTLS_ASN1_CONTEXT_SPECIFIC | 2 ) )
- {
- *p += tag_len;
- continue;
- }
-
- /* Allocate and assign next pointer */
- if( cur->buf.p != NULL )
- {
- if( cur->next != NULL )
- return( MBEDTLS_ERR_X509_INVALID_EXTENSIONS );
-
- cur->next = mbedtls_calloc( 1, sizeof( mbedtls_asn1_sequence ) );
-
- if( cur->next == NULL )
- return( MBEDTLS_ERR_X509_INVALID_EXTENSIONS +
- MBEDTLS_ERR_ASN1_ALLOC_FAILED );
-
- cur = cur->next;
- }
-
- buf = &(cur->buf);
- buf->tag = tag;
- buf->p = *p;
- buf->len = tag_len;
- *p += buf->len;
- }
-
- /* Set final sequence entry's next pointer to NULL */
- cur->next = NULL;
-
- if( *p != end )
- return( MBEDTLS_ERR_X509_INVALID_EXTENSIONS +
- MBEDTLS_ERR_ASN1_LENGTH_MISMATCH );
-
- return( 0 );
-}
-
-/*
- * X.509 v3 extensions
- *
- */
-static int x509_get_crt_ext( unsigned char **p,
- const unsigned char *end,
- mbedtls_x509_crt *crt )
-{
- int ret;
- size_t len;
- unsigned char *end_ext_data, *end_ext_octet;
-
- if( ( ret = mbedtls_x509_get_ext( p, end, &crt->v3_ext, 3 ) ) != 0 )
- {
- if( ret == MBEDTLS_ERR_ASN1_UNEXPECTED_TAG )
- return( 0 );
-
- return( ret );
- }
-
- while( *p < end )
- {
- /*
- * Extension ::= SEQUENCE {
- * extnID OBJECT IDENTIFIER,
- * critical BOOLEAN DEFAULT FALSE,
- * extnValue OCTET STRING }
- */
- mbedtls_x509_buf extn_oid = {0, 0, NULL};
- int is_critical = 0; /* DEFAULT FALSE */
- int ext_type = 0;
-
- if( ( ret = mbedtls_asn1_get_tag( p, end, &len,
- MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE ) ) != 0 )
- return( MBEDTLS_ERR_X509_INVALID_EXTENSIONS + ret );
-
- end_ext_data = *p + len;
-
- /* Get extension ID */
- extn_oid.tag = **p;
-
- if( ( ret = mbedtls_asn1_get_tag( p, end, &extn_oid.len, MBEDTLS_ASN1_OID ) ) != 0 )
- return( MBEDTLS_ERR_X509_INVALID_EXTENSIONS + ret );
-
- extn_oid.p = *p;
- *p += extn_oid.len;
-
- if( ( end - *p ) < 1 )
- return( MBEDTLS_ERR_X509_INVALID_EXTENSIONS +
- MBEDTLS_ERR_ASN1_OUT_OF_DATA );
-
- /* Get optional critical */
- if( ( ret = mbedtls_asn1_get_bool( p, end_ext_data, &is_critical ) ) != 0 &&
- ( ret != MBEDTLS_ERR_ASN1_UNEXPECTED_TAG ) )
- return( MBEDTLS_ERR_X509_INVALID_EXTENSIONS + ret );
-
- /* Data should be octet string type */
- if( ( ret = mbedtls_asn1_get_tag( p, end_ext_data, &len,
- MBEDTLS_ASN1_OCTET_STRING ) ) != 0 )
- return( MBEDTLS_ERR_X509_INVALID_EXTENSIONS + ret );
-
- end_ext_octet = *p + len;
-
- if( end_ext_octet != end_ext_data )
- return( MBEDTLS_ERR_X509_INVALID_EXTENSIONS +
- MBEDTLS_ERR_ASN1_LENGTH_MISMATCH );
-
- /*
- * Detect supported extensions
- */
- ret = mbedtls_oid_get_x509_ext_type( &extn_oid, &ext_type );
-
- if( ret != 0 )
- {
- /* No parser found, skip extension */
- *p = end_ext_octet;
-
-#if !defined(MBEDTLS_X509_ALLOW_UNSUPPORTED_CRITICAL_EXTENSION)
- if( is_critical )
- {
- /* Data is marked as critical: fail */
- return( MBEDTLS_ERR_X509_INVALID_EXTENSIONS +
- MBEDTLS_ERR_ASN1_UNEXPECTED_TAG );
- }
-#endif
- continue;
- }
-
- /* Forbid repeated extensions */
- if( ( crt->ext_types & ext_type ) != 0 )
- return( MBEDTLS_ERR_X509_INVALID_EXTENSIONS );
-
- crt->ext_types |= ext_type;
-
- switch( ext_type )
- {
- case MBEDTLS_X509_EXT_BASIC_CONSTRAINTS:
- /* Parse basic constraints */
- if( ( ret = x509_get_basic_constraints( p, end_ext_octet,
- &crt->ca_istrue, &crt->max_pathlen ) ) != 0 )
- return( ret );
- break;
-
- case MBEDTLS_X509_EXT_KEY_USAGE:
- /* Parse key usage */
- if( ( ret = x509_get_key_usage( p, end_ext_octet,
- &crt->key_usage ) ) != 0 )
- return( ret );
- break;
-
- case MBEDTLS_X509_EXT_EXTENDED_KEY_USAGE:
- /* Parse extended key usage */
- if( ( ret = x509_get_ext_key_usage( p, end_ext_octet,
- &crt->ext_key_usage ) ) != 0 )
- return( ret );
- break;
-
- case MBEDTLS_X509_EXT_SUBJECT_ALT_NAME:
- /* Parse subject alt name */
- if( ( ret = x509_get_subject_alt_name( p, end_ext_octet,
- &crt->subject_alt_names ) ) != 0 )
- return( ret );
- break;
-
- case MBEDTLS_X509_EXT_NS_CERT_TYPE:
- /* Parse netscape certificate type */
- if( ( ret = x509_get_ns_cert_type( p, end_ext_octet,
- &crt->ns_cert_type ) ) != 0 )
- return( ret );
- break;
-
- default:
- return( MBEDTLS_ERR_X509_FEATURE_UNAVAILABLE );
- }
- }
-
- if( *p != end )
- return( MBEDTLS_ERR_X509_INVALID_EXTENSIONS +
- MBEDTLS_ERR_ASN1_LENGTH_MISMATCH );
-
- return( 0 );
-}
-
-/*
- * Parse and fill a single X.509 certificate in DER format
- */
-static int x509_crt_parse_der_core( mbedtls_x509_crt *crt, const unsigned char *buf,
- size_t buflen )
-{
- int ret;
- size_t len;
- unsigned char *p, *end, *crt_end;
- mbedtls_x509_buf sig_params1, sig_params2, sig_oid2;
-
- memset( &sig_params1, 0, sizeof( mbedtls_x509_buf ) );
- memset( &sig_params2, 0, sizeof( mbedtls_x509_buf ) );
- memset( &sig_oid2, 0, sizeof( mbedtls_x509_buf ) );
-
- /*
- * Check for valid input
- */
- if( crt == NULL || buf == NULL )
- return( MBEDTLS_ERR_X509_BAD_INPUT_DATA );
-
- // Use the original buffer until we figure out actual length
- p = (unsigned char*) buf;
- len = buflen;
- end = p + len;
-
- /*
- * Certificate ::= SEQUENCE {
- * tbsCertificate TBSCertificate,
- * signatureAlgorithm AlgorithmIdentifier,
- * signatureValue BIT STRING }
- */
- if( ( ret = mbedtls_asn1_get_tag( &p, end, &len,
- MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE ) ) != 0 )
- {
- mbedtls_x509_crt_free( crt );
- return( MBEDTLS_ERR_X509_INVALID_FORMAT );
- }
-
- if( len > (size_t) ( end - p ) )
- {
- mbedtls_x509_crt_free( crt );
- return( MBEDTLS_ERR_X509_INVALID_FORMAT +
- MBEDTLS_ERR_ASN1_LENGTH_MISMATCH );
- }
- crt_end = p + len;
-
- // Create and populate a new buffer for the raw field
- crt->raw.len = crt_end - buf;
- crt->raw.p = p = mbedtls_calloc( 1, crt->raw.len );
- if( p == NULL )
- return( MBEDTLS_ERR_X509_ALLOC_FAILED );
-
- memcpy( p, buf, crt->raw.len );
-
- // Direct pointers to the new buffer
- p += crt->raw.len - len;
- end = crt_end = p + len;
-
- /*
- * TBSCertificate ::= SEQUENCE {
- */
- crt->tbs.p = p;
-
- if( ( ret = mbedtls_asn1_get_tag( &p, end, &len,
- MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE ) ) != 0 )
- {
- mbedtls_x509_crt_free( crt );
- return( MBEDTLS_ERR_X509_INVALID_FORMAT + ret );
- }
-
- end = p + len;
- crt->tbs.len = end - crt->tbs.p;
-
- /*
- * Version ::= INTEGER { v1(0), v2(1), v3(2) }
- *
- * CertificateSerialNumber ::= INTEGER
- *
- * signature AlgorithmIdentifier
- */
- if( ( ret = x509_get_version( &p, end, &crt->version ) ) != 0 ||
- ( ret = mbedtls_x509_get_serial( &p, end, &crt->serial ) ) != 0 ||
- ( ret = mbedtls_x509_get_alg( &p, end, &crt->sig_oid,
- &sig_params1 ) ) != 0 )
- {
- mbedtls_x509_crt_free( crt );
- return( ret );
- }
-
- if( crt->version < 0 || crt->version > 2 )
- {
- mbedtls_x509_crt_free( crt );
- return( MBEDTLS_ERR_X509_UNKNOWN_VERSION );
- }
-
- crt->version++;
-
- if( ( ret = mbedtls_x509_get_sig_alg( &crt->sig_oid, &sig_params1,
- &crt->sig_md, &crt->sig_pk,
- &crt->sig_opts ) ) != 0 )
- {
- mbedtls_x509_crt_free( crt );
- return( ret );
- }
-
- /*
- * issuer Name
- */
- crt->issuer_raw.p = p;
-
- if( ( ret = mbedtls_asn1_get_tag( &p, end, &len,
- MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE ) ) != 0 )
- {
- mbedtls_x509_crt_free( crt );
- return( MBEDTLS_ERR_X509_INVALID_FORMAT + ret );
- }
-
- if( ( ret = mbedtls_x509_get_name( &p, p + len, &crt->issuer ) ) != 0 )
- {
- mbedtls_x509_crt_free( crt );
- return( ret );
- }
-
- crt->issuer_raw.len = p - crt->issuer_raw.p;
-
- /*
- * Validity ::= SEQUENCE {
- * notBefore Time,
- * notAfter Time }
- *
- */
- if( ( ret = x509_get_dates( &p, end, &crt->valid_from,
- &crt->valid_to ) ) != 0 )
- {
- mbedtls_x509_crt_free( crt );
- return( ret );
- }
-
- /*
- * subject Name
- */
- crt->subject_raw.p = p;
-
- if( ( ret = mbedtls_asn1_get_tag( &p, end, &len,
- MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE ) ) != 0 )
- {
- mbedtls_x509_crt_free( crt );
- return( MBEDTLS_ERR_X509_INVALID_FORMAT + ret );
- }
-
- if( len && ( ret = mbedtls_x509_get_name( &p, p + len, &crt->subject ) ) != 0 )
- {
- mbedtls_x509_crt_free( crt );
- return( ret );
- }
-
- crt->subject_raw.len = p - crt->subject_raw.p;
-
- /*
- * SubjectPublicKeyInfo
- */
- if( ( ret = mbedtls_pk_parse_subpubkey( &p, end, &crt->pk ) ) != 0 )
- {
- mbedtls_x509_crt_free( crt );
- return( ret );
- }
-
- /*
- * issuerUniqueID [1] IMPLICIT UniqueIdentifier OPTIONAL,
- * -- If present, version shall be v2 or v3
- * subjectUniqueID [2] IMPLICIT UniqueIdentifier OPTIONAL,
- * -- If present, version shall be v2 or v3
- * extensions [3] EXPLICIT Extensions OPTIONAL
- * -- If present, version shall be v3
- */
- if( crt->version == 2 || crt->version == 3 )
- {
- ret = x509_get_uid( &p, end, &crt->issuer_id, 1 );
- if( ret != 0 )
- {
- mbedtls_x509_crt_free( crt );
- return( ret );
- }
- }
-
- if( crt->version == 2 || crt->version == 3 )
- {
- ret = x509_get_uid( &p, end, &crt->subject_id, 2 );
- if( ret != 0 )
- {
- mbedtls_x509_crt_free( crt );
- return( ret );
- }
- }
-
-#if !defined(MBEDTLS_X509_ALLOW_EXTENSIONS_NON_V3)
- if( crt->version == 3 )
-#endif
- {
- ret = x509_get_crt_ext( &p, end, crt );
- if( ret != 0 )
- {
- mbedtls_x509_crt_free( crt );
- return( ret );
- }
- }
-
- if( p != end )
- {
- mbedtls_x509_crt_free( crt );
- return( MBEDTLS_ERR_X509_INVALID_FORMAT +
- MBEDTLS_ERR_ASN1_LENGTH_MISMATCH );
- }
-
- end = crt_end;
-
- /*
- * }
- * -- end of TBSCertificate
- *
- * signatureAlgorithm AlgorithmIdentifier,
- * signatureValue BIT STRING
- */
- if( ( ret = mbedtls_x509_get_alg( &p, end, &sig_oid2, &sig_params2 ) ) != 0 )
- {
- mbedtls_x509_crt_free( crt );
- return( ret );
- }
-
- if( crt->sig_oid.len != sig_oid2.len ||
- memcmp( crt->sig_oid.p, sig_oid2.p, crt->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_crt_free( crt );
- return( MBEDTLS_ERR_X509_SIG_MISMATCH );
- }
-
- if( ( ret = mbedtls_x509_get_sig( &p, end, &crt->sig ) ) != 0 )
- {
- mbedtls_x509_crt_free( crt );
- return( ret );
- }
-
- if( p != end )
- {
- mbedtls_x509_crt_free( crt );
- return( MBEDTLS_ERR_X509_INVALID_FORMAT +
- MBEDTLS_ERR_ASN1_LENGTH_MISMATCH );
- }
-
- return( 0 );
-}
-
-/*
- * Parse one X.509 certificate in DER format from a buffer and add them to a
- * chained list
- */
-int mbedtls_x509_crt_parse_der( mbedtls_x509_crt *chain, const unsigned char *buf,
- size_t buflen )
-{
- int ret;
- mbedtls_x509_crt *crt = chain, *prev = NULL;
-
- /*
- * Check for valid input
- */
- if( crt == NULL || buf == NULL )
- return( MBEDTLS_ERR_X509_BAD_INPUT_DATA );
-
- while( crt->version != 0 && crt->next != NULL )
- {
- prev = crt;
- crt = crt->next;
- }
-
- /*
- * Add new certificate on the end of the chain if needed.
- */
- if( crt->version != 0 && crt->next == NULL )
- {
- crt->next = mbedtls_calloc( 1, sizeof( mbedtls_x509_crt ) );
-
- if( crt->next == NULL )
- return( MBEDTLS_ERR_X509_ALLOC_FAILED );
-
- prev = crt;
- mbedtls_x509_crt_init( crt->next );
- crt = crt->next;
- }
-
- if( ( ret = x509_crt_parse_der_core( crt, buf, buflen ) ) != 0 )
- {
- if( prev )
- prev->next = NULL;
-
- if( crt != chain )
- mbedtls_free( crt );
-
- return( ret );
- }
-
- return( 0 );
-}
-
-/*
- * Parse one or more PEM certificates from a buffer and add them to the chained
- * list
- */
-int mbedtls_x509_crt_parse( mbedtls_x509_crt *chain, const unsigned char *buf, size_t buflen )
-{
-#if defined(MBEDTLS_PEM_PARSE_C)
- int success = 0, first_error = 0, total_failed = 0;
- int buf_format = MBEDTLS_X509_FORMAT_DER;
-#endif
-
- /*
- * Check for valid input
- */
- if( chain == NULL || buf == NULL )
- return( MBEDTLS_ERR_X509_BAD_INPUT_DATA );
-
- /*
- * Determine buffer content. Buffer contains either one DER certificate or
- * one or more PEM certificates.
- */
-#if defined(MBEDTLS_PEM_PARSE_C)
- if( buflen != 0 && buf[buflen - 1] == '\0' &&
- strstr( (const char *) buf, "-----BEGIN CERTIFICATE-----" ) != NULL )
- {
- buf_format = MBEDTLS_X509_FORMAT_PEM;
- }
-
- if( buf_format == MBEDTLS_X509_FORMAT_DER )
- return mbedtls_x509_crt_parse_der( chain, buf, buflen );
-#else
- return mbedtls_x509_crt_parse_der( chain, buf, buflen );
-#endif
-
-#if defined(MBEDTLS_PEM_PARSE_C)
- if( buf_format == MBEDTLS_X509_FORMAT_PEM )
- {
- int ret;
- mbedtls_pem_context pem;
-
- /* 1 rather than 0 since the terminating NULL byte is counted in */
- while( buflen > 1 )
- {
- size_t use_len;
- mbedtls_pem_init( &pem );
-
- /* If we get there, we know the string is null-terminated */
- ret = mbedtls_pem_read_buffer( &pem,
- "-----BEGIN CERTIFICATE-----",
- "-----END CERTIFICATE-----",
- buf, NULL, 0, &use_len );
-
- if( ret == 0 )
- {
- /*
- * Was PEM encoded
- */
- buflen -= use_len;
- buf += use_len;
- }
- else if( ret == MBEDTLS_ERR_PEM_BAD_INPUT_DATA )
- {
- return( ret );
- }
- else if( ret != MBEDTLS_ERR_PEM_NO_HEADER_FOOTER_PRESENT )
- {
- mbedtls_pem_free( &pem );
-
- /*
- * PEM header and footer were found
- */
- buflen -= use_len;
- buf += use_len;
-
- if( first_error == 0 )
- first_error = ret;
-
- total_failed++;
- continue;
- }
- else
- break;
-
- ret = mbedtls_x509_crt_parse_der( chain, pem.buf, pem.buflen );
-
- mbedtls_pem_free( &pem );
-
- if( ret != 0 )
- {
- /*
- * Quit parsing on a memory error
- */
- if( ret == MBEDTLS_ERR_X509_ALLOC_FAILED )
- return( ret );
-
- if( first_error == 0 )
- first_error = ret;
-
- total_failed++;
- continue;
- }
-
- success = 1;
- }
- }
-
- if( success )
- return( total_failed );
- else if( first_error )
- return( first_error );
- else
- return( MBEDTLS_ERR_X509_CERT_UNKNOWN_FORMAT );
-#endif /* MBEDTLS_PEM_PARSE_C */
-}
-
-#if defined(MBEDTLS_FS_IO)
-/*
- * Load one or more certificates and add them to the chained list
- */
-int mbedtls_x509_crt_parse_file( mbedtls_x509_crt *chain, const char *path )
-{
- int ret;
- size_t n;
- unsigned char *buf;
-
- if( ( ret = mbedtls_pk_load_file( path, &buf, &n ) ) != 0 )
- return( ret );
-
- ret = mbedtls_x509_crt_parse( chain, buf, n );
-
- mbedtls_zeroize( buf, n );
- mbedtls_free( buf );
-
- return( ret );
-}
-
-int mbedtls_x509_crt_parse_path( mbedtls_x509_crt *chain, const char *path )
-{
- int ret = 0;
-#if defined(_WIN32) && !defined(EFIX64) && !defined(EFI32)
- int w_ret;
- WCHAR szDir[MAX_PATH];
- char filename[MAX_PATH];
- char *p;
- size_t len = strlen( path );
-
- WIN32_FIND_DATAW file_data;
- HANDLE hFind;
-
- if( len > MAX_PATH - 3 )
- return( MBEDTLS_ERR_X509_BAD_INPUT_DATA );
-
- memset( szDir, 0, sizeof(szDir) );
- memset( filename, 0, MAX_PATH );
- memcpy( filename, path, len );
- filename[len++] = '\\';
- p = filename + len;
- filename[len++] = '*';
-
- w_ret = MultiByteToWideChar( CP_ACP, 0, filename, (int)len, szDir,
- MAX_PATH - 3 );
- if( w_ret == 0 )
- return( MBEDTLS_ERR_X509_BAD_INPUT_DATA );
-
- hFind = FindFirstFileW( szDir, &file_data );
- if( hFind == INVALID_HANDLE_VALUE )
- return( MBEDTLS_ERR_X509_FILE_IO_ERROR );
-
- len = MAX_PATH - len;
- do
- {
- memset( p, 0, len );
-
- if( file_data.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY )
- continue;
-
- w_ret = WideCharToMultiByte( CP_ACP, 0, file_data.cFileName,
- lstrlenW( file_data.cFileName ),
- p, (int) len - 1,
- NULL, NULL );
- if( w_ret == 0 )
- {
- ret = MBEDTLS_ERR_X509_FILE_IO_ERROR;
- goto cleanup;
- }
-
- w_ret = mbedtls_x509_crt_parse_file( chain, filename );
- if( w_ret < 0 )
- ret++;
- else
- ret += w_ret;
- }
- while( FindNextFileW( hFind, &file_data ) != 0 );
-
- if( GetLastError() != ERROR_NO_MORE_FILES )
- ret = MBEDTLS_ERR_X509_FILE_IO_ERROR;
-
-cleanup:
- FindClose( hFind );
-#else /* _WIN32 */
- int t_ret;
- int snp_ret;
- struct stat sb;
- struct dirent *entry;
- char entry_name[MBEDTLS_X509_MAX_FILE_PATH_LEN];
- DIR *dir = opendir( path );
-
- if( dir == NULL )
- return( MBEDTLS_ERR_X509_FILE_IO_ERROR );
-
-#if defined(MBEDTLS_THREADING_C)
- if( ( ret = mbedtls_mutex_lock( &mbedtls_threading_readdir_mutex ) ) != 0 )
- {
- closedir( dir );
- return( ret );
- }
-#endif /* MBEDTLS_THREADING_C */
-
- while( ( entry = readdir( dir ) ) != NULL )
- {
- snp_ret = mbedtls_snprintf( entry_name, sizeof entry_name,
- "%s/%s", path, entry->d_name );
-
- if( snp_ret < 0 || (size_t)snp_ret >= sizeof entry_name )
- {
- ret = MBEDTLS_ERR_X509_BUFFER_TOO_SMALL;
- goto cleanup;
- }
- else if( stat( entry_name, &sb ) == -1 )
- {
- ret = MBEDTLS_ERR_X509_FILE_IO_ERROR;
- goto cleanup;
- }
-
- if( !S_ISREG( sb.st_mode ) )
- continue;
-
- // Ignore parse errors
- //
- t_ret = mbedtls_x509_crt_parse_file( chain, entry_name );
- if( t_ret < 0 )
- ret++;
- else
- ret += t_ret;
- }
-
-cleanup:
- closedir( dir );
-
-#if defined(MBEDTLS_THREADING_C)
- if( mbedtls_mutex_unlock( &mbedtls_threading_readdir_mutex ) != 0 )
- ret = MBEDTLS_ERR_THREADING_MUTEX_ERROR;
-#endif /* MBEDTLS_THREADING_C */
-
-#endif /* _WIN32 */
-
- return( ret );
-}
-#endif /* MBEDTLS_FS_IO */
-
-static int x509_info_subject_alt_name( char **buf, size_t *size,
- const mbedtls_x509_sequence *subject_alt_name )
-{
- size_t i;
- size_t n = *size;
- char *p = *buf;
- const mbedtls_x509_sequence *cur = subject_alt_name;
- const char *sep = "";
- size_t sep_len = 0;
-
- while( cur != NULL )
- {
- if( cur->buf.len + sep_len >= n )
- {
- *p = '\0';
- return( MBEDTLS_ERR_X509_BUFFER_TOO_SMALL );
- }
-
- n -= cur->buf.len + sep_len;
- for( i = 0; i < sep_len; i++ )
- *p++ = sep[i];
- for( i = 0; i < cur->buf.len; i++ )
- *p++ = cur->buf.p[i];
-
- sep = ", ";
- sep_len = 2;
-
- cur = cur->next;
- }
-
- *p = '\0';
-
- *size = n;
- *buf = p;
-
- return( 0 );
-}
-
-#define PRINT_ITEM(i) \
- { \
- ret = mbedtls_snprintf( p, n, "%s" i, sep ); \
- MBEDTLS_X509_SAFE_SNPRINTF; \
- sep = ", "; \
- }
-
-#define CERT_TYPE(type,name) \
- if( ns_cert_type & type ) \
- PRINT_ITEM( name );
-
-static int x509_info_cert_type( char **buf, size_t *size,
- unsigned char ns_cert_type )
-{
- int ret;
- size_t n = *size;
- char *p = *buf;
- const char *sep = "";
-
- CERT_TYPE( MBEDTLS_X509_NS_CERT_TYPE_SSL_CLIENT, "SSL Client" );
- CERT_TYPE( MBEDTLS_X509_NS_CERT_TYPE_SSL_SERVER, "SSL Server" );
- CERT_TYPE( MBEDTLS_X509_NS_CERT_TYPE_EMAIL, "Email" );
- CERT_TYPE( MBEDTLS_X509_NS_CERT_TYPE_OBJECT_SIGNING, "Object Signing" );
- CERT_TYPE( MBEDTLS_X509_NS_CERT_TYPE_RESERVED, "Reserved" );
- CERT_TYPE( MBEDTLS_X509_NS_CERT_TYPE_SSL_CA, "SSL CA" );
- CERT_TYPE( MBEDTLS_X509_NS_CERT_TYPE_EMAIL_CA, "Email CA" );
- CERT_TYPE( MBEDTLS_X509_NS_CERT_TYPE_OBJECT_SIGNING_CA, "Object Signing CA" );
-
- *size = n;
- *buf = p;
-
- return( 0 );
-}
-
-#define KEY_USAGE(code,name) \
- if( key_usage & code ) \
- PRINT_ITEM( name );
-
-static int x509_info_key_usage( char **buf, size_t *size,
- unsigned int key_usage )
-{
- int ret;
- size_t n = *size;
- char *p = *buf;
- const char *sep = "";
-
- KEY_USAGE( MBEDTLS_X509_KU_DIGITAL_SIGNATURE, "Digital Signature" );
- KEY_USAGE( MBEDTLS_X509_KU_NON_REPUDIATION, "Non Repudiation" );
- KEY_USAGE( MBEDTLS_X509_KU_KEY_ENCIPHERMENT, "Key Encipherment" );
- KEY_USAGE( MBEDTLS_X509_KU_DATA_ENCIPHERMENT, "Data Encipherment" );
- KEY_USAGE( MBEDTLS_X509_KU_KEY_AGREEMENT, "Key Agreement" );
- KEY_USAGE( MBEDTLS_X509_KU_KEY_CERT_SIGN, "Key Cert Sign" );
- KEY_USAGE( MBEDTLS_X509_KU_CRL_SIGN, "CRL Sign" );
- KEY_USAGE( MBEDTLS_X509_KU_ENCIPHER_ONLY, "Encipher Only" );
- KEY_USAGE( MBEDTLS_X509_KU_DECIPHER_ONLY, "Decipher Only" );
-
- *size = n;
- *buf = p;
-
- return( 0 );
-}
-
-static int x509_info_ext_key_usage( char **buf, size_t *size,
- const mbedtls_x509_sequence *extended_key_usage )
-{
- int ret;
- const char *desc;
- size_t n = *size;
- char *p = *buf;
- const mbedtls_x509_sequence *cur = extended_key_usage;
- const char *sep = "";
-
- while( cur != NULL )
- {
- if( mbedtls_oid_get_extended_key_usage( &cur->buf, &desc ) != 0 )
- desc = "???";
-
- ret = mbedtls_snprintf( p, n, "%s%s", sep, desc );
- MBEDTLS_X509_SAFE_SNPRINTF;
-
- sep = ", ";
-
- cur = cur->next;
- }
-
- *size = n;
- *buf = p;
-
- return( 0 );
-}
-
-/*
- * Return an informational string about the certificate.
- */
-#define BEFORE_COLON 18
-#define BC "18"
-int mbedtls_x509_crt_info( char *buf, size_t size, const char *prefix,
- const mbedtls_x509_crt *crt )
-{
- int ret;
- size_t n;
- char *p;
- char key_size_str[BEFORE_COLON];
-
- p = buf;
- n = size;
-
- if( NULL == crt )
- {
- ret = mbedtls_snprintf( p, n, "\nCertificate is uninitialised!\n" );
- MBEDTLS_X509_SAFE_SNPRINTF;
-
- return( (int) ( size - n ) );
- }
-
- ret = mbedtls_snprintf( p, n, "%scert. version : %d\n",
- prefix, crt->version );
- MBEDTLS_X509_SAFE_SNPRINTF;
- ret = mbedtls_snprintf( p, n, "%sserial number : ",
- prefix );
- MBEDTLS_X509_SAFE_SNPRINTF;
-
- ret = mbedtls_x509_serial_gets( p, n, &crt->serial );
- MBEDTLS_X509_SAFE_SNPRINTF;
-
- ret = mbedtls_snprintf( p, n, "\n%sissuer name : ", prefix );
- MBEDTLS_X509_SAFE_SNPRINTF;
- ret = mbedtls_x509_dn_gets( p, n, &crt->issuer );
- MBEDTLS_X509_SAFE_SNPRINTF;
-
- ret = mbedtls_snprintf( p, n, "\n%ssubject name : ", prefix );
- MBEDTLS_X509_SAFE_SNPRINTF;
- ret = mbedtls_x509_dn_gets( p, n, &crt->subject );
- MBEDTLS_X509_SAFE_SNPRINTF;
-
- ret = mbedtls_snprintf( p, n, "\n%sissued on : " \
- "%04d-%02d-%02d %02d:%02d:%02d", prefix,
- crt->valid_from.year, crt->valid_from.mon,
- crt->valid_from.day, crt->valid_from.hour,
- crt->valid_from.min, crt->valid_from.sec );
- MBEDTLS_X509_SAFE_SNPRINTF;
-
- ret = mbedtls_snprintf( p, n, "\n%sexpires on : " \
- "%04d-%02d-%02d %02d:%02d:%02d", prefix,
- crt->valid_to.year, crt->valid_to.mon,
- crt->valid_to.day, crt->valid_to.hour,
- crt->valid_to.min, crt->valid_to.sec );
- MBEDTLS_X509_SAFE_SNPRINTF;
-
- ret = mbedtls_snprintf( p, n, "\n%ssigned using : ", prefix );
- MBEDTLS_X509_SAFE_SNPRINTF;
-
- ret = mbedtls_x509_sig_alg_gets( p, n, &crt->sig_oid, crt->sig_pk,
- crt->sig_md, crt->sig_opts );
- MBEDTLS_X509_SAFE_SNPRINTF;
-
- /* Key size */
- if( ( ret = mbedtls_x509_key_size_helper( key_size_str, BEFORE_COLON,
- mbedtls_pk_get_name( &crt->pk ) ) ) != 0 )
- {
- return( ret );
- }
-
- ret = mbedtls_snprintf( p, n, "\n%s%-" BC "s: %d bits", prefix, key_size_str,
- (int) mbedtls_pk_get_bitlen( &crt->pk ) );
- MBEDTLS_X509_SAFE_SNPRINTF;
-
- /*
- * Optional extensions
- */
-
- if( crt->ext_types & MBEDTLS_X509_EXT_BASIC_CONSTRAINTS )
- {
- ret = mbedtls_snprintf( p, n, "\n%sbasic constraints : CA=%s", prefix,
- crt->ca_istrue ? "true" : "false" );
- MBEDTLS_X509_SAFE_SNPRINTF;
-
- if( crt->max_pathlen > 0 )
- {
- ret = mbedtls_snprintf( p, n, ", max_pathlen=%d", crt->max_pathlen - 1 );
- MBEDTLS_X509_SAFE_SNPRINTF;
- }
- }
-
- if( crt->ext_types & MBEDTLS_X509_EXT_SUBJECT_ALT_NAME )
- {
- ret = mbedtls_snprintf( p, n, "\n%ssubject alt name : ", prefix );
- MBEDTLS_X509_SAFE_SNPRINTF;
-
- if( ( ret = x509_info_subject_alt_name( &p, &n,
- &crt->subject_alt_names ) ) != 0 )
- return( ret );
- }
-
- if( crt->ext_types & MBEDTLS_X509_EXT_NS_CERT_TYPE )
- {
- ret = mbedtls_snprintf( p, n, "\n%scert. type : ", prefix );
- MBEDTLS_X509_SAFE_SNPRINTF;
-
- if( ( ret = x509_info_cert_type( &p, &n, crt->ns_cert_type ) ) != 0 )
- return( ret );
- }
-
- if( crt->ext_types & MBEDTLS_X509_EXT_KEY_USAGE )
- {
- ret = mbedtls_snprintf( p, n, "\n%skey usage : ", prefix );
- MBEDTLS_X509_SAFE_SNPRINTF;
-
- if( ( ret = x509_info_key_usage( &p, &n, crt->key_usage ) ) != 0 )
- return( ret );
- }
-
- if( crt->ext_types & MBEDTLS_X509_EXT_EXTENDED_KEY_USAGE )
- {
- ret = mbedtls_snprintf( p, n, "\n%sext key usage : ", prefix );
- MBEDTLS_X509_SAFE_SNPRINTF;
-
- if( ( ret = x509_info_ext_key_usage( &p, &n,
- &crt->ext_key_usage ) ) != 0 )
- return( ret );
- }
-
- ret = mbedtls_snprintf( p, n, "\n" );
- MBEDTLS_X509_SAFE_SNPRINTF;
-
- return( (int) ( size - n ) );
-}
-
-struct x509_crt_verify_string {
- int code;
- const char *string;
-};
-
-static const struct x509_crt_verify_string x509_crt_verify_strings[] = {
- { MBEDTLS_X509_BADCERT_EXPIRED, "The certificate validity has expired" },
- { MBEDTLS_X509_BADCERT_REVOKED, "The certificate has been revoked (is on a CRL)" },
- { MBEDTLS_X509_BADCERT_CN_MISMATCH, "The certificate Common Name (CN) does not match with the expected CN" },
- { MBEDTLS_X509_BADCERT_NOT_TRUSTED, "The certificate is not correctly signed by the trusted CA" },
- { MBEDTLS_X509_BADCRL_NOT_TRUSTED, "The CRL is not correctly signed by the trusted CA" },
- { MBEDTLS_X509_BADCRL_EXPIRED, "The CRL is expired" },
- { MBEDTLS_X509_BADCERT_MISSING, "Certificate was missing" },
- { MBEDTLS_X509_BADCERT_SKIP_VERIFY, "Certificate verification was skipped" },
- { MBEDTLS_X509_BADCERT_OTHER, "Other reason (can be used by verify callback)" },
- { MBEDTLS_X509_BADCERT_FUTURE, "The certificate validity starts in the future" },
- { MBEDTLS_X509_BADCRL_FUTURE, "The CRL is from the future" },
- { MBEDTLS_X509_BADCERT_KEY_USAGE, "Usage does not match the keyUsage extension" },
- { MBEDTLS_X509_BADCERT_EXT_KEY_USAGE, "Usage does not match the extendedKeyUsage extension" },
- { MBEDTLS_X509_BADCERT_NS_CERT_TYPE, "Usage does not match the nsCertType extension" },
- { MBEDTLS_X509_BADCERT_BAD_MD, "The certificate is signed with an unacceptable hash." },
- { MBEDTLS_X509_BADCERT_BAD_PK, "The certificate is signed with an unacceptable PK alg (eg RSA vs ECDSA)." },
- { MBEDTLS_X509_BADCERT_BAD_KEY, "The certificate is signed with an unacceptable key (eg bad curve, RSA too short)." },
- { MBEDTLS_X509_BADCRL_BAD_MD, "The CRL is signed with an unacceptable hash." },
- { MBEDTLS_X509_BADCRL_BAD_PK, "The CRL is signed with an unacceptable PK alg (eg RSA vs ECDSA)." },
- { MBEDTLS_X509_BADCRL_BAD_KEY, "The CRL is signed with an unacceptable key (eg bad curve, RSA too short)." },
- { 0, NULL }
-};
-
-int mbedtls_x509_crt_verify_info( char *buf, size_t size, const char *prefix,
- uint32_t flags )
-{
- int ret;
- const struct x509_crt_verify_string *cur;
- char *p = buf;
- size_t n = size;
-
- for( cur = x509_crt_verify_strings; cur->string != NULL ; cur++ )
- {
- if( ( flags & cur->code ) == 0 )
- continue;
-
- ret = mbedtls_snprintf( p, n, "%s%s\n", prefix, cur->string );
- MBEDTLS_X509_SAFE_SNPRINTF;
- flags ^= cur->code;
- }
-
- if( flags != 0 )
- {
- ret = mbedtls_snprintf( p, n, "%sUnknown reason "
- "(this should not happen)\n", prefix );
- MBEDTLS_X509_SAFE_SNPRINTF;
- }
-
- return( (int) ( size - n ) );
-}
-
-#if defined(MBEDTLS_X509_CHECK_KEY_USAGE)
-int mbedtls_x509_crt_check_key_usage( const mbedtls_x509_crt *crt,
- unsigned int usage )
-{
- unsigned int usage_must, usage_may;
- unsigned int may_mask = MBEDTLS_X509_KU_ENCIPHER_ONLY
- | MBEDTLS_X509_KU_DECIPHER_ONLY;
-
- if( ( crt->ext_types & MBEDTLS_X509_EXT_KEY_USAGE ) == 0 )
- return( 0 );
-
- usage_must = usage & ~may_mask;
-
- if( ( ( crt->key_usage & ~may_mask ) & usage_must ) != usage_must )
- return( MBEDTLS_ERR_X509_BAD_INPUT_DATA );
-
- usage_may = usage & may_mask;
-
- if( ( ( crt->key_usage & may_mask ) | usage_may ) != usage_may )
- return( MBEDTLS_ERR_X509_BAD_INPUT_DATA );
-
- return( 0 );
-}
-#endif
-
-#if defined(MBEDTLS_X509_CHECK_EXTENDED_KEY_USAGE)
-int mbedtls_x509_crt_check_extended_key_usage( const mbedtls_x509_crt *crt,
- const char *usage_oid,
- size_t usage_len )
-{
- const mbedtls_x509_sequence *cur;
-
- /* Extension is not mandatory, absent means no restriction */
- if( ( crt->ext_types & MBEDTLS_X509_EXT_EXTENDED_KEY_USAGE ) == 0 )
- return( 0 );
-
- /*
- * Look for the requested usage (or wildcard ANY) in our list
- */
- for( cur = &crt->ext_key_usage; cur != NULL; cur = cur->next )
- {
- const mbedtls_x509_buf *cur_oid = &cur->buf;
-
- if( cur_oid->len == usage_len &&
- memcmp( cur_oid->p, usage_oid, usage_len ) == 0 )
- {
- return( 0 );
- }
-
- if( MBEDTLS_OID_CMP( MBEDTLS_OID_ANY_EXTENDED_KEY_USAGE, cur_oid ) == 0 )
- return( 0 );
- }
-
- return( MBEDTLS_ERR_X509_BAD_INPUT_DATA );
-}
-#endif /* MBEDTLS_X509_CHECK_EXTENDED_KEY_USAGE */
-
-#if defined(MBEDTLS_X509_CRL_PARSE_C)
-/*
- * Return 1 if the certificate is revoked, or 0 otherwise.
- */
-int mbedtls_x509_crt_is_revoked( const mbedtls_x509_crt *crt, const mbedtls_x509_crl *crl )
-{
- const mbedtls_x509_crl_entry *cur = &crl->entry;
-
- while( cur != NULL && cur->serial.len != 0 )
- {
- if( crt->serial.len == cur->serial.len &&
- memcmp( crt->serial.p, cur->serial.p, crt->serial.len ) == 0 )
- {
- if( mbedtls_x509_time_is_past( &cur->revocation_date ) )
- return( 1 );
- }
-
- cur = cur->next;
- }
-
- return( 0 );
-}
-
-/*
- * Check that the given certificate is not revoked according to the CRL.
- * Skip validation is no CRL for the given CA is present.
- */
-static int x509_crt_verifycrl( mbedtls_x509_crt *crt, mbedtls_x509_crt *ca,
- mbedtls_x509_crl *crl_list,
- const mbedtls_x509_crt_profile *profile )
-{
- int flags = 0;
- unsigned char hash[MBEDTLS_MD_MAX_SIZE];
- const mbedtls_md_info_t *md_info;
-
- if( ca == NULL )
- return( flags );
-
- while( crl_list != NULL )
- {
- if( crl_list->version == 0 ||
- crl_list->issuer_raw.len != ca->subject_raw.len ||
- memcmp( crl_list->issuer_raw.p, ca->subject_raw.p,
- crl_list->issuer_raw.len ) != 0 )
- {
- crl_list = crl_list->next;
- continue;
- }
-
- /*
- * Check if the CA is configured to sign CRLs
- */
-#if defined(MBEDTLS_X509_CHECK_KEY_USAGE)
- if( mbedtls_x509_crt_check_key_usage( ca, MBEDTLS_X509_KU_CRL_SIGN ) != 0 )
- {
- flags |= MBEDTLS_X509_BADCRL_NOT_TRUSTED;
- break;
- }
-#endif
-
- /*
- * Check if CRL is correctly signed by the trusted CA
- */
- if( x509_profile_check_md_alg( profile, crl_list->sig_md ) != 0 )
- flags |= MBEDTLS_X509_BADCRL_BAD_MD;
-
- if( x509_profile_check_pk_alg( profile, crl_list->sig_pk ) != 0 )
- flags |= MBEDTLS_X509_BADCRL_BAD_PK;
-
- md_info = mbedtls_md_info_from_type( crl_list->sig_md );
- if( md_info == NULL )
- {
- /*
- * Cannot check 'unknown' hash
- */
- flags |= MBEDTLS_X509_BADCRL_NOT_TRUSTED;
- break;
- }
-
- mbedtls_md( md_info, crl_list->tbs.p, crl_list->tbs.len, hash );
-
- if( x509_profile_check_key( profile, crl_list->sig_pk, &ca->pk ) != 0 )
- flags |= MBEDTLS_X509_BADCERT_BAD_KEY;
-
- if( mbedtls_pk_verify_ext( crl_list->sig_pk, crl_list->sig_opts, &ca->pk,
- crl_list->sig_md, hash, mbedtls_md_get_size( md_info ),
- crl_list->sig.p, crl_list->sig.len ) != 0 )
- {
- flags |= MBEDTLS_X509_BADCRL_NOT_TRUSTED;
- break;
- }
-
- /*
- * Check for validity of CRL (Do not drop out)
- */
- if( mbedtls_x509_time_is_past( &crl_list->next_update ) )
- flags |= MBEDTLS_X509_BADCRL_EXPIRED;
-
- if( mbedtls_x509_time_is_future( &crl_list->this_update ) )
- flags |= MBEDTLS_X509_BADCRL_FUTURE;
-
- /*
- * Check if certificate is revoked
- */
- if( mbedtls_x509_crt_is_revoked( crt, crl_list ) )
- {
- flags |= MBEDTLS_X509_BADCERT_REVOKED;
- break;
- }
-
- crl_list = crl_list->next;
- }
-
- return( flags );
-}
-#endif /* MBEDTLS_X509_CRL_PARSE_C */
-
-/*
- * Like memcmp, but case-insensitive and always returns -1 if different
- */
-static int x509_memcasecmp( const void *s1, const void *s2, size_t len )
-{
- size_t i;
- unsigned char diff;
- const unsigned char *n1 = s1, *n2 = s2;
-
- for( i = 0; i < len; i++ )
- {
- diff = n1[i] ^ n2[i];
-
- if( diff == 0 )
- continue;
-
- if( diff == 32 &&
- ( ( n1[i] >= 'a' && n1[i] <= 'z' ) ||
- ( n1[i] >= 'A' && n1[i] <= 'Z' ) ) )
- {
- continue;
- }
-
- return( -1 );
- }
-
- return( 0 );
-}
-
-/*
- * Return 0 if name matches wildcard, -1 otherwise
- */
-static int x509_check_wildcard( const char *cn, mbedtls_x509_buf *name )
-{
- size_t i;
- size_t cn_idx = 0, cn_len = strlen( cn );
-
- if( name->len < 3 || name->p[0] != '*' || name->p[1] != '.' )
- return( 0 );
-
- for( i = 0; i < cn_len; ++i )
- {
- if( cn[i] == '.' )
- {
- cn_idx = i;
- break;
- }
- }
-
- if( cn_idx == 0 )
- return( -1 );
-
- if( cn_len - cn_idx == name->len - 1 &&
- x509_memcasecmp( name->p + 1, cn + cn_idx, name->len - 1 ) == 0 )
- {
- return( 0 );
- }
-
- return( -1 );
-}
-
-/*
- * Compare two X.509 strings, case-insensitive, and allowing for some encoding
- * variations (but not all).
- *
- * Return 0 if equal, -1 otherwise.
- */
-static int x509_string_cmp( const mbedtls_x509_buf *a, const mbedtls_x509_buf *b )
-{
- if( a->tag == b->tag &&
- a->len == b->len &&
- memcmp( a->p, b->p, b->len ) == 0 )
- {
- return( 0 );
- }
-
- if( ( a->tag == MBEDTLS_ASN1_UTF8_STRING || a->tag == MBEDTLS_ASN1_PRINTABLE_STRING ) &&
- ( b->tag == MBEDTLS_ASN1_UTF8_STRING || b->tag == MBEDTLS_ASN1_PRINTABLE_STRING ) &&
- a->len == b->len &&
- x509_memcasecmp( a->p, b->p, b->len ) == 0 )
- {
- return( 0 );
- }
-
- return( -1 );
-}
-
-/*
- * Compare two X.509 Names (aka rdnSequence).
- *
- * See RFC 5280 section 7.1, though we don't implement the whole algorithm:
- * we sometimes return unequal when the full algorithm would return equal,
- * but never the other way. (In particular, we don't do Unicode normalisation
- * or space folding.)
- *
- * Return 0 if equal, -1 otherwise.
- */
-static int x509_name_cmp( const mbedtls_x509_name *a, const mbedtls_x509_name *b )
-{
- /* Avoid recursion, it might not be optimised by the compiler */
- while( a != NULL || b != NULL )
- {
- if( a == NULL || b == NULL )
- return( -1 );
-
- /* type */
- if( a->oid.tag != b->oid.tag ||
- a->oid.len != b->oid.len ||
- memcmp( a->oid.p, b->oid.p, b->oid.len ) != 0 )
- {
- return( -1 );
- }
-
- /* value */
- if( x509_string_cmp( &a->val, &b->val ) != 0 )
- return( -1 );
-
- /* structure of the list of sets */
- if( a->next_merged != b->next_merged )
- return( -1 );
-
- a = a->next;
- b = b->next;
- }
-
- /* a == NULL == b */
- return( 0 );
-}
-
-/*
- * Check if 'parent' is a suitable parent (signing CA) for 'child'.
- * Return 0 if yes, -1 if not.
- *
- * top means parent is a locally-trusted certificate
- * bottom means child is the end entity cert
- */
-static int x509_crt_check_parent( const mbedtls_x509_crt *child,
- const mbedtls_x509_crt *parent,
- int top, int bottom )
-{
- int need_ca_bit;
-
- /* Parent must be the issuer */
- if( x509_name_cmp( &child->issuer, &parent->subject ) != 0 )
- return( -1 );
-
- /* Parent must have the basicConstraints CA bit set as a general rule */
- need_ca_bit = 1;
-
- /* Exception: v1/v2 certificates that are locally trusted. */
- if( top && parent->version < 3 )
- need_ca_bit = 0;
-
- /* Exception: self-signed end-entity certs that are locally trusted. */
- if( top && bottom &&
- child->raw.len == parent->raw.len &&
- memcmp( child->raw.p, parent->raw.p, child->raw.len ) == 0 )
- {
- need_ca_bit = 0;
- }
-
- if( need_ca_bit && ! parent->ca_istrue )
- return( -1 );
-
-#if defined(MBEDTLS_X509_CHECK_KEY_USAGE)
- if( need_ca_bit &&
- mbedtls_x509_crt_check_key_usage( parent, MBEDTLS_X509_KU_KEY_CERT_SIGN ) != 0 )
- {
- return( -1 );
- }
-#endif
-
- return( 0 );
-}
-
-static int x509_crt_verify_top(
- mbedtls_x509_crt *child, mbedtls_x509_crt *trust_ca,
- mbedtls_x509_crl *ca_crl,
- const mbedtls_x509_crt_profile *profile,
- int path_cnt, int self_cnt, uint32_t *flags,
- int (*f_vrfy)(void *, mbedtls_x509_crt *, int, uint32_t *),
- void *p_vrfy )
-{
- int ret;
- uint32_t ca_flags = 0;
- int check_path_cnt;
- unsigned char hash[MBEDTLS_MD_MAX_SIZE];
- const mbedtls_md_info_t *md_info;
- mbedtls_x509_crt *future_past_ca = NULL;
-
- if( mbedtls_x509_time_is_past( &child->valid_to ) )
- *flags |= MBEDTLS_X509_BADCERT_EXPIRED;
-
- if( mbedtls_x509_time_is_future( &child->valid_from ) )
- *flags |= MBEDTLS_X509_BADCERT_FUTURE;
-
- if( x509_profile_check_md_alg( profile, child->sig_md ) != 0 )
- *flags |= MBEDTLS_X509_BADCERT_BAD_MD;
-
- if( x509_profile_check_pk_alg( profile, child->sig_pk ) != 0 )
- *flags |= MBEDTLS_X509_BADCERT_BAD_PK;
-
- /*
- * Child is the top of the chain. Check against the trust_ca list.
- */
- *flags |= MBEDTLS_X509_BADCERT_NOT_TRUSTED;
-
- md_info = mbedtls_md_info_from_type( child->sig_md );
- if( md_info == NULL )
- {
- /*
- * Cannot check 'unknown', no need to try any CA
- */
- trust_ca = NULL;
- }
- else
- mbedtls_md( md_info, child->tbs.p, child->tbs.len, hash );
-
- for( /* trust_ca */ ; trust_ca != NULL; trust_ca = trust_ca->next )
- {
- if( x509_crt_check_parent( child, trust_ca, 1, path_cnt == 0 ) != 0 )
- continue;
-
- check_path_cnt = path_cnt + 1;
-
- /*
- * Reduce check_path_cnt to check against if top of the chain is
- * the same as the trusted CA
- */
- if( child->subject_raw.len == trust_ca->subject_raw.len &&
- memcmp( child->subject_raw.p, trust_ca->subject_raw.p,
- child->issuer_raw.len ) == 0 )
- {
- check_path_cnt--;
- }
-
- /* Self signed certificates do not count towards the limit */
- if( trust_ca->max_pathlen > 0 &&
- trust_ca->max_pathlen < check_path_cnt - self_cnt )
- {
- continue;
- }
-
- if( mbedtls_pk_verify_ext( child->sig_pk, child->sig_opts, &trust_ca->pk,
- child->sig_md, hash, mbedtls_md_get_size( md_info ),
- child->sig.p, child->sig.len ) != 0 )
- {
- continue;
- }
-
- if( mbedtls_x509_time_is_past( &trust_ca->valid_to ) ||
- mbedtls_x509_time_is_future( &trust_ca->valid_from ) )
- {
- if ( future_past_ca == NULL )
- future_past_ca = trust_ca;
-
- continue;
- }
-
- break;
- }
-
- if( trust_ca != NULL || ( trust_ca = future_past_ca ) != NULL )
- {
- /*
- * Top of chain is signed by a trusted CA
- */
- *flags &= ~MBEDTLS_X509_BADCERT_NOT_TRUSTED;
-
- if( x509_profile_check_key( profile, child->sig_pk, &trust_ca->pk ) != 0 )
- *flags |= MBEDTLS_X509_BADCERT_BAD_KEY;
- }
-
- /*
- * If top of chain is not the same as the trusted CA send a verify request
- * to the callback for any issues with validity and CRL presence for the
- * trusted CA certificate.
- */
- if( trust_ca != NULL &&
- ( child->subject_raw.len != trust_ca->subject_raw.len ||
- memcmp( child->subject_raw.p, trust_ca->subject_raw.p,
- child->issuer_raw.len ) != 0 ) )
- {
-#if defined(MBEDTLS_X509_CRL_PARSE_C)
- /* Check trusted CA's CRL for the chain's top crt */
- *flags |= x509_crt_verifycrl( child, trust_ca, ca_crl, profile );
-#else
- ((void) ca_crl);
-#endif
-
- if( mbedtls_x509_time_is_past( &trust_ca->valid_to ) )
- ca_flags |= MBEDTLS_X509_BADCERT_EXPIRED;
-
- if( mbedtls_x509_time_is_future( &trust_ca->valid_from ) )
- ca_flags |= MBEDTLS_X509_BADCERT_FUTURE;
-
- if( NULL != f_vrfy )
- {
- if( ( ret = f_vrfy( p_vrfy, trust_ca, path_cnt + 1,
- &ca_flags ) ) != 0 )
- {
- return( ret );
- }
- }
- }
-
- /* Call callback on top cert */
- if( NULL != f_vrfy )
- {
- if( ( ret = f_vrfy( p_vrfy, child, path_cnt, flags ) ) != 0 )
- return( ret );
- }
-
- *flags |= ca_flags;
-
- return( 0 );
-}
-
-static int x509_crt_verify_child(
- mbedtls_x509_crt *child, mbedtls_x509_crt *parent,
- mbedtls_x509_crt *trust_ca, mbedtls_x509_crl *ca_crl,
- const mbedtls_x509_crt_profile *profile,
- int path_cnt, int self_cnt, uint32_t *flags,
- int (*f_vrfy)(void *, mbedtls_x509_crt *, int, uint32_t *),
- void *p_vrfy )
-{
- int ret;
- uint32_t parent_flags = 0;
- unsigned char hash[MBEDTLS_MD_MAX_SIZE];
- mbedtls_x509_crt *grandparent;
- const mbedtls_md_info_t *md_info;
-
- /* Counting intermediate self signed certificates */
- if( ( path_cnt != 0 ) && x509_name_cmp( &child->issuer, &child->subject ) == 0 )
- self_cnt++;
-
- /* path_cnt is 0 for the first intermediate CA */
- if( 1 + path_cnt > MBEDTLS_X509_MAX_INTERMEDIATE_CA )
- {
- /* return immediately as the goal is to avoid unbounded recursion */
- return( MBEDTLS_ERR_X509_FATAL_ERROR );
- }
-
- if( mbedtls_x509_time_is_past( &child->valid_to ) )
- *flags |= MBEDTLS_X509_BADCERT_EXPIRED;
-
- if( mbedtls_x509_time_is_future( &child->valid_from ) )
- *flags |= MBEDTLS_X509_BADCERT_FUTURE;
-
- if( x509_profile_check_md_alg( profile, child->sig_md ) != 0 )
- *flags |= MBEDTLS_X509_BADCERT_BAD_MD;
-
- if( x509_profile_check_pk_alg( profile, child->sig_pk ) != 0 )
- *flags |= MBEDTLS_X509_BADCERT_BAD_PK;
-
- md_info = mbedtls_md_info_from_type( child->sig_md );
- if( md_info == NULL )
- {
- /*
- * Cannot check 'unknown' hash
- */
- *flags |= MBEDTLS_X509_BADCERT_NOT_TRUSTED;
- }
- else
- {
- mbedtls_md( md_info, child->tbs.p, child->tbs.len, hash );
-
- if( x509_profile_check_key( profile, child->sig_pk, &parent->pk ) != 0 )
- *flags |= MBEDTLS_X509_BADCERT_BAD_KEY;
-
- if( mbedtls_pk_verify_ext( child->sig_pk, child->sig_opts, &parent->pk,
- child->sig_md, hash, mbedtls_md_get_size( md_info ),
- child->sig.p, child->sig.len ) != 0 )
- {
- *flags |= MBEDTLS_X509_BADCERT_NOT_TRUSTED;
- }
- }
-
-#if defined(MBEDTLS_X509_CRL_PARSE_C)
- /* Check trusted CA's CRL for the given crt */
- *flags |= x509_crt_verifycrl(child, parent, ca_crl, profile );
-#endif
-
- /* Look for a grandparent in trusted CAs */
- for( grandparent = trust_ca;
- grandparent != NULL;
- grandparent = grandparent->next )
- {
- if( x509_crt_check_parent( parent, grandparent,
- 0, path_cnt == 0 ) == 0 )
- break;
- }
-
- if( grandparent != NULL )
- {
- ret = x509_crt_verify_top( parent, grandparent, ca_crl, profile,
- path_cnt + 1, self_cnt, &parent_flags, f_vrfy, p_vrfy );
- if( ret != 0 )
- return( ret );
- }
- else
- {
- /* Look for a grandparent upwards the chain */
- for( grandparent = parent->next;
- grandparent != NULL;
- grandparent = grandparent->next )
- {
- /* +2 because the current step is not yet accounted for
- * and because max_pathlen is one higher than it should be.
- * Also self signed certificates do not count to the limit. */
- if( grandparent->max_pathlen > 0 &&
- grandparent->max_pathlen < 2 + path_cnt - self_cnt )
- {
- continue;
- }
-
- if( x509_crt_check_parent( parent, grandparent,
- 0, path_cnt == 0 ) == 0 )
- break;
- }
-
- /* Is our parent part of the chain or at the top? */
- if( grandparent != NULL )
- {
- ret = x509_crt_verify_child( parent, grandparent, trust_ca, ca_crl,
- profile, path_cnt + 1, self_cnt, &parent_flags,
- f_vrfy, p_vrfy );
- if( ret != 0 )
- return( ret );
- }
- else
- {
- ret = x509_crt_verify_top( parent, trust_ca, ca_crl, profile,
- path_cnt + 1, self_cnt, &parent_flags,
- f_vrfy, p_vrfy );
- if( ret != 0 )
- return( ret );
- }
- }
-
- /* child is verified to be a child of the parent, call verify callback */
- if( NULL != f_vrfy )
- if( ( ret = f_vrfy( p_vrfy, child, path_cnt, flags ) ) != 0 )
- return( ret );
-
- *flags |= parent_flags;
-
- return( 0 );
-}
-
-/*
- * Verify the certificate validity
- */
-int mbedtls_x509_crt_verify( mbedtls_x509_crt *crt,
- mbedtls_x509_crt *trust_ca,
- mbedtls_x509_crl *ca_crl,
- const char *cn, uint32_t *flags,
- int (*f_vrfy)(void *, mbedtls_x509_crt *, int, uint32_t *),
- void *p_vrfy )
-{
- return( mbedtls_x509_crt_verify_with_profile( crt, trust_ca, ca_crl,
- &mbedtls_x509_crt_profile_default, cn, flags, f_vrfy, p_vrfy ) );
-}
-
-
-/*
- * Verify the certificate validity, with profile
- */
-int mbedtls_x509_crt_verify_with_profile( mbedtls_x509_crt *crt,
- mbedtls_x509_crt *trust_ca,
- mbedtls_x509_crl *ca_crl,
- const mbedtls_x509_crt_profile *profile,
- const char *cn, uint32_t *flags,
- int (*f_vrfy)(void *, mbedtls_x509_crt *, int, uint32_t *),
- void *p_vrfy )
-{
- size_t cn_len;
- int ret;
- int pathlen = 0, selfsigned = 0;
- mbedtls_x509_crt *parent;
- mbedtls_x509_name *name;
- mbedtls_x509_sequence *cur = NULL;
- mbedtls_pk_type_t pk_type;
-
- *flags = 0;
-
- if( profile == NULL )
- {
- ret = MBEDTLS_ERR_X509_BAD_INPUT_DATA;
- goto exit;
- }
-
- if( cn != NULL )
- {
- name = &crt->subject;
- cn_len = strlen( cn );
-
- if( crt->ext_types & MBEDTLS_X509_EXT_SUBJECT_ALT_NAME )
- {
- cur = &crt->subject_alt_names;
-
- while( cur != NULL )
- {
- if( cur->buf.len == cn_len &&
- x509_memcasecmp( cn, cur->buf.p, cn_len ) == 0 )
- break;
-
- if( cur->buf.len > 2 &&
- memcmp( cur->buf.p, "*.", 2 ) == 0 &&
- x509_check_wildcard( cn, &cur->buf ) == 0 )
- {
- break;
- }
-
- cur = cur->next;
- }
-
- if( cur == NULL )
- *flags |= MBEDTLS_X509_BADCERT_CN_MISMATCH;
- }
- else
- {
- while( name != NULL )
- {
- if( MBEDTLS_OID_CMP( MBEDTLS_OID_AT_CN, &name->oid ) == 0 )
- {
- if( name->val.len == cn_len &&
- x509_memcasecmp( name->val.p, cn, cn_len ) == 0 )
- break;
-
- if( name->val.len > 2 &&
- memcmp( name->val.p, "*.", 2 ) == 0 &&
- x509_check_wildcard( cn, &name->val ) == 0 )
- break;
- }
-
- name = name->next;
- }
-
- if( name == NULL )
- *flags |= MBEDTLS_X509_BADCERT_CN_MISMATCH;
- }
- }
-
- /* Check the type and size of the key */
- pk_type = mbedtls_pk_get_type( &crt->pk );
-
- if( x509_profile_check_pk_alg( profile, pk_type ) != 0 )
- *flags |= MBEDTLS_X509_BADCERT_BAD_PK;
-
- if( x509_profile_check_key( profile, pk_type, &crt->pk ) != 0 )
- *flags |= MBEDTLS_X509_BADCERT_BAD_KEY;
-
- /* Look for a parent in trusted CAs */
- for( parent = trust_ca; parent != NULL; parent = parent->next )
- {
- if( x509_crt_check_parent( crt, parent, 0, pathlen == 0 ) == 0 )
- break;
- }
-
- if( parent != NULL )
- {
- ret = x509_crt_verify_top( crt, parent, ca_crl, profile,
- pathlen, selfsigned, flags, f_vrfy, p_vrfy );
- if( ret != 0 )
- goto exit;
- }
- else
- {
- /* Look for a parent upwards the chain */
- for( parent = crt->next; parent != NULL; parent = parent->next )
- if( x509_crt_check_parent( crt, parent, 0, pathlen == 0 ) == 0 )
- break;
-
- /* Are we part of the chain or at the top? */
- if( parent != NULL )
- {
- ret = x509_crt_verify_child( crt, parent, trust_ca, ca_crl, profile,
- pathlen, selfsigned, flags, f_vrfy, p_vrfy );
- if( ret != 0 )
- goto exit;
- }
- else
- {
- ret = x509_crt_verify_top( crt, trust_ca, ca_crl, profile,
- pathlen, selfsigned, flags, f_vrfy, p_vrfy );
- if( ret != 0 )
- goto exit;
- }
- }
-
-exit:
- /* prevent misuse of the vrfy callback - VERIFY_FAILED would be ignored by
- * the SSL module for authmode optional, but non-zero return from the
- * callback means a fatal error so it shouldn't be ignored */
- if( ret == MBEDTLS_ERR_X509_CERT_VERIFY_FAILED )
- ret = MBEDTLS_ERR_X509_FATAL_ERROR;
-
- if( ret != 0 )
- {
- *flags = (uint32_t) -1;
- return( ret );
- }
-
- if( *flags != 0 )
- return( MBEDTLS_ERR_X509_CERT_VERIFY_FAILED );
-
- return( 0 );
-}
-
-/*
- * Initialize a certificate chain
- */
-void mbedtls_x509_crt_init( mbedtls_x509_crt *crt )
-{
- memset( crt, 0, sizeof(mbedtls_x509_crt) );
-}
-
-/*
- * Unallocate all certificate data
- */
-void mbedtls_x509_crt_free( mbedtls_x509_crt *crt )
-{
- mbedtls_x509_crt *cert_cur = crt;
- mbedtls_x509_crt *cert_prv;
- mbedtls_x509_name *name_cur;
- mbedtls_x509_name *name_prv;
- mbedtls_x509_sequence *seq_cur;
- mbedtls_x509_sequence *seq_prv;
-
- if( crt == NULL )
- return;
-
- do
- {
- mbedtls_pk_free( &cert_cur->pk );
-
-#if defined(MBEDTLS_X509_RSASSA_PSS_SUPPORT)
- mbedtls_free( cert_cur->sig_opts );
-#endif
-
- name_cur = cert_cur->issuer.next;
- while( name_cur != NULL )
- {
- name_prv = name_cur;
- name_cur = name_cur->next;
- mbedtls_zeroize( name_prv, sizeof( mbedtls_x509_name ) );
- mbedtls_free( name_prv );
- }
-
- name_cur = cert_cur->subject.next;
- while( name_cur != NULL )
- {
- name_prv = name_cur;
- name_cur = name_cur->next;
- mbedtls_zeroize( name_prv, sizeof( mbedtls_x509_name ) );
- mbedtls_free( name_prv );
- }
-
- seq_cur = cert_cur->ext_key_usage.next;
- while( seq_cur != NULL )
- {
- seq_prv = seq_cur;
- seq_cur = seq_cur->next;
- mbedtls_zeroize( seq_prv, sizeof( mbedtls_x509_sequence ) );
- mbedtls_free( seq_prv );
- }
-
- seq_cur = cert_cur->subject_alt_names.next;
- while( seq_cur != NULL )
- {
- seq_prv = seq_cur;
- seq_cur = seq_cur->next;
- mbedtls_zeroize( seq_prv, sizeof( mbedtls_x509_sequence ) );
- mbedtls_free( seq_prv );
- }
-
- if( cert_cur->raw.p != NULL )
- {
- mbedtls_zeroize( cert_cur->raw.p, cert_cur->raw.len );
- mbedtls_free( cert_cur->raw.p );
- }
-
- cert_cur = cert_cur->next;
- }
- while( cert_cur != NULL );
-
- cert_cur = crt;
- do
- {
- cert_prv = cert_cur;
- cert_cur = cert_cur->next;
-
- mbedtls_zeroize( cert_prv, sizeof( mbedtls_x509_crt ) );
- if( cert_prv != crt )
- mbedtls_free( cert_prv );
- }
- while( cert_cur != NULL );
-}
-
-#endif /* MBEDTLS_X509_CRT_PARSE_C */
projects / reactos.git / blobdiff