diff options
Diffstat (limited to 'lib/mbedtls-2.27.0/library/x509.c')
| -rw-r--r-- | lib/mbedtls-2.27.0/library/x509.c | 1067 |
1 files changed, 0 insertions, 1067 deletions
diff --git a/lib/mbedtls-2.27.0/library/x509.c b/lib/mbedtls-2.27.0/library/x509.c deleted file mode 100644 index f21e9e6..0000000 --- a/lib/mbedtls-2.27.0/library/x509.c +++ /dev/null @@ -1,1067 +0,0 @@ -/* - * X.509 common functions for parsing and verification - * - * Copyright The Mbed TLS Contributors - * SPDX-License-Identifier: Apache-2.0 - * - * Licensed under the Apache License, Version 2.0 (the "License"); you may - * not use this file except in compliance with the License. - * You may obtain a copy of the License at - * - * http://www.apache.org/licenses/LICENSE-2.0 - * - * Unless required by applicable law or agreed to in writing, software - * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT - * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. - * See the License for the specific language governing permissions and - * limitations under the License. - */ -/* - * The ITU-T X.509 standard defines a certificate format for PKI. - * - * http://www.ietf.org/rfc/rfc5280.txt (Certificates and CRLs) - * http://www.ietf.org/rfc/rfc3279.txt (Alg IDs for CRLs) - * http://www.ietf.org/rfc/rfc2986.txt (CSRs, aka PKCS#10) - * - * http://www.itu.int/ITU-T/studygroups/com17/languages/X.680-0207.pdf - * http://www.itu.int/ITU-T/studygroups/com17/languages/X.690-0207.pdf - */ - -#include "common.h" - -#if defined(MBEDTLS_X509_USE_C) - -#include "mbedtls/x509.h" -#include "mbedtls/asn1.h" -#include "mbedtls/error.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 <stdio.h> -#include <stdlib.h> -#define mbedtls_free free -#define mbedtls_calloc calloc -#define mbedtls_printf printf -#define mbedtls_snprintf snprintf -#endif - -#if defined(MBEDTLS_HAVE_TIME) -#include "mbedtls/platform_time.h" -#endif -#if defined(MBEDTLS_HAVE_TIME_DATE) -#include "mbedtls/platform_util.h" -#include <time.h> -#endif - -#define CHECK(code) if( ( ret = ( code ) ) != 0 ){ return( ret ); } -#define CHECK_RANGE(min, max, val) \ - do \ - { \ - if( ( val ) < ( min ) || ( val ) > ( max ) ) \ - { \ - return( ret ); \ - } \ - } while( 0 ) - -/* - * CertificateSerialNumber ::= INTEGER - */ -int mbedtls_x509_get_serial( unsigned char **p, const unsigned char *end, - mbedtls_x509_buf *serial ) -{ - int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED; - - if( ( end - *p ) < 1 ) - return( MBEDTLS_ERROR_ADD( MBEDTLS_ERR_X509_INVALID_SERIAL, - MBEDTLS_ERR_ASN1_OUT_OF_DATA ) ); - - if( **p != ( MBEDTLS_ASN1_CONTEXT_SPECIFIC | MBEDTLS_ASN1_PRIMITIVE | 2 ) && - **p != MBEDTLS_ASN1_INTEGER ) - return( MBEDTLS_ERROR_ADD( MBEDTLS_ERR_X509_INVALID_SERIAL, - MBEDTLS_ERR_ASN1_UNEXPECTED_TAG ) ); - - serial->tag = *(*p)++; - - if( ( ret = mbedtls_asn1_get_len( p, end, &serial->len ) ) != 0 ) - return( MBEDTLS_ERROR_ADD( MBEDTLS_ERR_X509_INVALID_SERIAL, ret ) ); - - serial->p = *p; - *p += serial->len; - - return( 0 ); -} - -/* Get an algorithm identifier without parameters (eg for signatures) - * - * AlgorithmIdentifier ::= SEQUENCE { - * algorithm OBJECT IDENTIFIER, - * parameters ANY DEFINED BY algorithm OPTIONAL } - */ -int mbedtls_x509_get_alg_null( unsigned char **p, const unsigned char *end, - mbedtls_x509_buf *alg ) -{ - int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED; - - if( ( ret = mbedtls_asn1_get_alg_null( p, end, alg ) ) != 0 ) - return( MBEDTLS_ERROR_ADD( MBEDTLS_ERR_X509_INVALID_ALG, ret ) ); - - return( 0 ); -} - -/* - * Parse an algorithm identifier with (optional) parameters - */ -int mbedtls_x509_get_alg( unsigned char **p, const unsigned char *end, - mbedtls_x509_buf *alg, mbedtls_x509_buf *params ) -{ - int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED; - - if( ( ret = mbedtls_asn1_get_alg( p, end, alg, params ) ) != 0 ) - return( MBEDTLS_ERROR_ADD( MBEDTLS_ERR_X509_INVALID_ALG, ret ) ); - - return( 0 ); -} - -#if defined(MBEDTLS_X509_RSASSA_PSS_SUPPORT) -/* - * HashAlgorithm ::= AlgorithmIdentifier - * - * AlgorithmIdentifier ::= SEQUENCE { - * algorithm OBJECT IDENTIFIER, - * parameters ANY DEFINED BY algorithm OPTIONAL } - * - * For HashAlgorithm, parameters MUST be NULL or absent. - */ -static int x509_get_hash_alg( const mbedtls_x509_buf *alg, mbedtls_md_type_t *md_alg ) -{ - int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED; - unsigned char *p; - const unsigned char *end; - mbedtls_x509_buf md_oid; - size_t len; - - /* Make sure we got a SEQUENCE and setup bounds */ - if( alg->tag != ( MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE ) ) - return( MBEDTLS_ERROR_ADD( MBEDTLS_ERR_X509_INVALID_ALG, - MBEDTLS_ERR_ASN1_UNEXPECTED_TAG ) ); - - p = alg->p; - end = p + alg->len; - - if( p >= end ) - return( MBEDTLS_ERROR_ADD( MBEDTLS_ERR_X509_INVALID_ALG, - MBEDTLS_ERR_ASN1_OUT_OF_DATA ) ); - - /* Parse md_oid */ - md_oid.tag = *p; - - if( ( ret = mbedtls_asn1_get_tag( &p, end, &md_oid.len, MBEDTLS_ASN1_OID ) ) != 0 ) - return( MBEDTLS_ERROR_ADD( MBEDTLS_ERR_X509_INVALID_ALG, ret ) ); - - md_oid.p = p; - p += md_oid.len; - - /* Get md_alg from md_oid */ - if( ( ret = mbedtls_oid_get_md_alg( &md_oid, md_alg ) ) != 0 ) - return( MBEDTLS_ERROR_ADD( MBEDTLS_ERR_X509_INVALID_ALG, ret ) ); - - /* Make sure params is absent of NULL */ - if( p == end ) - return( 0 ); - - if( ( ret = mbedtls_asn1_get_tag( &p, end, &len, MBEDTLS_ASN1_NULL ) ) != 0 || len != 0 ) - return( MBEDTLS_ERROR_ADD( MBEDTLS_ERR_X509_INVALID_ALG, ret ) ); - - if( p != end ) - return( MBEDTLS_ERROR_ADD( MBEDTLS_ERR_X509_INVALID_ALG, - MBEDTLS_ERR_ASN1_LENGTH_MISMATCH ) ); - - return( 0 ); -} - -/* - * RSASSA-PSS-params ::= SEQUENCE { - * hashAlgorithm [0] HashAlgorithm DEFAULT sha1Identifier, - * maskGenAlgorithm [1] MaskGenAlgorithm DEFAULT mgf1SHA1Identifier, - * saltLength [2] INTEGER DEFAULT 20, - * trailerField [3] INTEGER DEFAULT 1 } - * -- Note that the tags in this Sequence are explicit. - * - * RFC 4055 (which defines use of RSASSA-PSS in PKIX) states that the value - * of trailerField MUST be 1, and PKCS#1 v2.2 doesn't even define any other - * option. Enfore this at parsing time. - */ -int mbedtls_x509_get_rsassa_pss_params( const mbedtls_x509_buf *params, - mbedtls_md_type_t *md_alg, mbedtls_md_type_t *mgf_md, - int *salt_len ) -{ - int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED; - unsigned char *p; - const unsigned char *end, *end2; - size_t len; - mbedtls_x509_buf alg_id, alg_params; - - /* First set everything to defaults */ - *md_alg = MBEDTLS_MD_SHA1; - *mgf_md = MBEDTLS_MD_SHA1; - *salt_len = 20; - - /* Make sure params is a SEQUENCE and setup bounds */ - if( params->tag != ( MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE ) ) - return( MBEDTLS_ERROR_ADD( MBEDTLS_ERR_X509_INVALID_ALG, - MBEDTLS_ERR_ASN1_UNEXPECTED_TAG ) ); - - p = (unsigned char *) params->p; - end = p + params->len; - - if( p == end ) - return( 0 ); - - /* - * HashAlgorithm - */ - if( ( ret = mbedtls_asn1_get_tag( &p, end, &len, - MBEDTLS_ASN1_CONTEXT_SPECIFIC | MBEDTLS_ASN1_CONSTRUCTED | 0 ) ) == 0 ) - { - end2 = p + len; - - /* HashAlgorithm ::= AlgorithmIdentifier (without parameters) */ - if( ( ret = mbedtls_x509_get_alg_null( &p, end2, &alg_id ) ) != 0 ) - return( ret ); - - if( ( ret = mbedtls_oid_get_md_alg( &alg_id, md_alg ) ) != 0 ) - return( MBEDTLS_ERROR_ADD( MBEDTLS_ERR_X509_INVALID_ALG, ret ) ); - - if( p != end2 ) - return( MBEDTLS_ERROR_ADD( MBEDTLS_ERR_X509_INVALID_ALG, - MBEDTLS_ERR_ASN1_LENGTH_MISMATCH ) ); - } - else if( ret != MBEDTLS_ERR_ASN1_UNEXPECTED_TAG ) - return( MBEDTLS_ERROR_ADD( MBEDTLS_ERR_X509_INVALID_ALG, ret ) ); - - if( p == end ) - return( 0 ); - - /* - * MaskGenAlgorithm - */ - if( ( ret = mbedtls_asn1_get_tag( &p, end, &len, - MBEDTLS_ASN1_CONTEXT_SPECIFIC | MBEDTLS_ASN1_CONSTRUCTED | 1 ) ) == 0 ) - { - end2 = p + len; - - /* MaskGenAlgorithm ::= AlgorithmIdentifier (params = HashAlgorithm) */ - if( ( ret = mbedtls_x509_get_alg( &p, end2, &alg_id, &alg_params ) ) != 0 ) - return( ret ); - - /* Only MFG1 is recognised for now */ - if( MBEDTLS_OID_CMP( MBEDTLS_OID_MGF1, &alg_id ) != 0 ) - return( MBEDTLS_ERROR_ADD( MBEDTLS_ERR_X509_FEATURE_UNAVAILABLE, - MBEDTLS_ERR_OID_NOT_FOUND ) ); - - /* Parse HashAlgorithm */ - if( ( ret = x509_get_hash_alg( &alg_params, mgf_md ) ) != 0 ) - return( ret ); - - if( p != end2 ) - return( MBEDTLS_ERROR_ADD( MBEDTLS_ERR_X509_INVALID_ALG, - MBEDTLS_ERR_ASN1_LENGTH_MISMATCH ) ); - } - else if( ret != MBEDTLS_ERR_ASN1_UNEXPECTED_TAG ) - return( MBEDTLS_ERROR_ADD( MBEDTLS_ERR_X509_INVALID_ALG, ret ) ); - - if( p == end ) - return( 0 ); - - /* - * salt_len - */ - if( ( ret = mbedtls_asn1_get_tag( &p, end, &len, - MBEDTLS_ASN1_CONTEXT_SPECIFIC | MBEDTLS_ASN1_CONSTRUCTED | 2 ) ) == 0 ) - { - end2 = p + len; - - if( ( ret = mbedtls_asn1_get_int( &p, end2, salt_len ) ) != 0 ) - return( MBEDTLS_ERROR_ADD( MBEDTLS_ERR_X509_INVALID_ALG, ret ) ); - - if( p != end2 ) - return( MBEDTLS_ERROR_ADD( MBEDTLS_ERR_X509_INVALID_ALG, - MBEDTLS_ERR_ASN1_LENGTH_MISMATCH ) ); - } - else if( ret != MBEDTLS_ERR_ASN1_UNEXPECTED_TAG ) - return( MBEDTLS_ERROR_ADD( MBEDTLS_ERR_X509_INVALID_ALG, ret ) ); - - if( p == end ) - return( 0 ); - - /* - * trailer_field (if present, must be 1) - */ - if( ( ret = mbedtls_asn1_get_tag( &p, end, &len, - MBEDTLS_ASN1_CONTEXT_SPECIFIC | MBEDTLS_ASN1_CONSTRUCTED | 3 ) ) == 0 ) - { - int trailer_field; - - end2 = p + len; - - if( ( ret = mbedtls_asn1_get_int( &p, end2, &trailer_field ) ) != 0 ) - return( MBEDTLS_ERROR_ADD( MBEDTLS_ERR_X509_INVALID_ALG, ret ) ); - - if( p != end2 ) - return( MBEDTLS_ERROR_ADD( MBEDTLS_ERR_X509_INVALID_ALG, - MBEDTLS_ERR_ASN1_LENGTH_MISMATCH ) ); - - if( trailer_field != 1 ) - return( MBEDTLS_ERR_X509_INVALID_ALG ); - } - else if( ret != MBEDTLS_ERR_ASN1_UNEXPECTED_TAG ) - return( MBEDTLS_ERROR_ADD( MBEDTLS_ERR_X509_INVALID_ALG, ret ) ); - - if( p != end ) - return( MBEDTLS_ERROR_ADD( MBEDTLS_ERR_X509_INVALID_ALG, - MBEDTLS_ERR_ASN1_LENGTH_MISMATCH ) ); - - return( 0 ); -} -#endif /* MBEDTLS_X509_RSASSA_PSS_SUPPORT */ - -/* - * AttributeTypeAndValue ::= SEQUENCE { - * type AttributeType, - * value AttributeValue } - * - * AttributeType ::= OBJECT IDENTIFIER - * - * AttributeValue ::= ANY DEFINED BY AttributeType - */ -static int x509_get_attr_type_value( unsigned char **p, - const unsigned char *end, - mbedtls_x509_name *cur ) -{ - int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED; - size_t len; - mbedtls_x509_buf *oid; - mbedtls_x509_buf *val; - - if( ( ret = mbedtls_asn1_get_tag( p, end, &len, - MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE ) ) != 0 ) - return( MBEDTLS_ERROR_ADD( MBEDTLS_ERR_X509_INVALID_NAME, ret ) ); - - end = *p + len; - - if( ( end - *p ) < 1 ) - return( MBEDTLS_ERROR_ADD( MBEDTLS_ERR_X509_INVALID_NAME, - MBEDTLS_ERR_ASN1_OUT_OF_DATA ) ); - - oid = &cur->oid; - oid->tag = **p; - - if( ( ret = mbedtls_asn1_get_tag( p, end, &oid->len, MBEDTLS_ASN1_OID ) ) != 0 ) - return( MBEDTLS_ERROR_ADD( MBEDTLS_ERR_X509_INVALID_NAME, ret ) ); - - oid->p = *p; - *p += oid->len; - - if( ( end - *p ) < 1 ) - return( MBEDTLS_ERROR_ADD( MBEDTLS_ERR_X509_INVALID_NAME, - MBEDTLS_ERR_ASN1_OUT_OF_DATA ) ); - - if( **p != MBEDTLS_ASN1_BMP_STRING && **p != MBEDTLS_ASN1_UTF8_STRING && - **p != MBEDTLS_ASN1_T61_STRING && **p != MBEDTLS_ASN1_PRINTABLE_STRING && - **p != MBEDTLS_ASN1_IA5_STRING && **p != MBEDTLS_ASN1_UNIVERSAL_STRING && - **p != MBEDTLS_ASN1_BIT_STRING ) - return( MBEDTLS_ERROR_ADD( MBEDTLS_ERR_X509_INVALID_NAME, - MBEDTLS_ERR_ASN1_UNEXPECTED_TAG ) ); - - val = &cur->val; - val->tag = *(*p)++; - - if( ( ret = mbedtls_asn1_get_len( p, end, &val->len ) ) != 0 ) - return( MBEDTLS_ERROR_ADD( MBEDTLS_ERR_X509_INVALID_NAME, ret ) ); - - val->p = *p; - *p += val->len; - - if( *p != end ) - { - return( MBEDTLS_ERROR_ADD( MBEDTLS_ERR_X509_INVALID_NAME, - MBEDTLS_ERR_ASN1_LENGTH_MISMATCH ) ); - } - - cur->next = NULL; - - return( 0 ); -} - -/* - * Name ::= CHOICE { -- only one possibility for now -- - * rdnSequence RDNSequence } - * - * RDNSequence ::= SEQUENCE OF RelativeDistinguishedName - * - * RelativeDistinguishedName ::= - * SET OF AttributeTypeAndValue - * - * AttributeTypeAndValue ::= SEQUENCE { - * type AttributeType, - * value AttributeValue } - * - * AttributeType ::= OBJECT IDENTIFIER - * - * AttributeValue ::= ANY DEFINED BY AttributeType - * - * The data structure is optimized for the common case where each RDN has only - * one element, which is represented as a list of AttributeTypeAndValue. - * For the general case we still use a flat list, but we mark elements of the - * same set so that they are "merged" together in the functions that consume - * this list, eg mbedtls_x509_dn_gets(). - */ -int mbedtls_x509_get_name( unsigned char **p, const unsigned char *end, - mbedtls_x509_name *cur ) -{ - int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED; - size_t set_len; - const unsigned char *end_set; - - /* don't use recursion, we'd risk stack overflow if not optimized */ - while( 1 ) - { - /* - * parse SET - */ - if( ( ret = mbedtls_asn1_get_tag( p, end, &set_len, - MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SET ) ) != 0 ) - return( MBEDTLS_ERROR_ADD( MBEDTLS_ERR_X509_INVALID_NAME, ret ) ); - - end_set = *p + set_len; - - while( 1 ) - { - if( ( ret = x509_get_attr_type_value( p, end_set, cur ) ) != 0 ) - return( ret ); - - if( *p == end_set ) - break; - - /* Mark this item as being no the only one in a set */ - cur->next_merged = 1; - - cur->next = mbedtls_calloc( 1, sizeof( mbedtls_x509_name ) ); - - if( cur->next == NULL ) - return( MBEDTLS_ERR_X509_ALLOC_FAILED ); - - cur = cur->next; - } - - /* - * continue until end of SEQUENCE is reached - */ - if( *p == end ) - return( 0 ); - - cur->next = mbedtls_calloc( 1, sizeof( mbedtls_x509_name ) ); - - if( cur->next == NULL ) - return( MBEDTLS_ERR_X509_ALLOC_FAILED ); - - cur = cur->next; - } -} - -static int x509_parse_int( unsigned char **p, size_t n, int *res ) -{ - *res = 0; - - for( ; n > 0; --n ) - { - if( ( **p < '0') || ( **p > '9' ) ) - return ( MBEDTLS_ERR_X509_INVALID_DATE ); - - *res *= 10; - *res += ( *(*p)++ - '0' ); - } - - return( 0 ); -} - -static int x509_date_is_valid(const mbedtls_x509_time *t ) -{ - int ret = MBEDTLS_ERR_X509_INVALID_DATE; - int month_len; - - CHECK_RANGE( 0, 9999, t->year ); - CHECK_RANGE( 0, 23, t->hour ); - CHECK_RANGE( 0, 59, t->min ); - CHECK_RANGE( 0, 59, t->sec ); - - switch( t->mon ) - { - case 1: case 3: case 5: case 7: case 8: case 10: case 12: - month_len = 31; - break; - case 4: case 6: case 9: case 11: - month_len = 30; - break; - case 2: - if( ( !( t->year % 4 ) && t->year % 100 ) || - !( t->year % 400 ) ) - month_len = 29; - else - month_len = 28; - break; - default: - return( ret ); - } - CHECK_RANGE( 1, month_len, t->day ); - - return( 0 ); -} - -/* - * Parse an ASN1_UTC_TIME (yearlen=2) or ASN1_GENERALIZED_TIME (yearlen=4) - * field. - */ -static int x509_parse_time( unsigned char **p, size_t len, size_t yearlen, - mbedtls_x509_time *tm ) -{ - int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED; - - /* - * Minimum length is 10 or 12 depending on yearlen - */ - if ( len < yearlen + 8 ) - return ( MBEDTLS_ERR_X509_INVALID_DATE ); - len -= yearlen + 8; - - /* - * Parse year, month, day, hour, minute - */ - CHECK( x509_parse_int( p, yearlen, &tm->year ) ); - if ( 2 == yearlen ) - { - if ( tm->year < 50 ) - tm->year += 100; - - tm->year += 1900; - } - - CHECK( x509_parse_int( p, 2, &tm->mon ) ); - CHECK( x509_parse_int( p, 2, &tm->day ) ); - CHECK( x509_parse_int( p, 2, &tm->hour ) ); - CHECK( x509_parse_int( p, 2, &tm->min ) ); - - /* - * Parse seconds if present - */ - if ( len >= 2 ) - { - CHECK( x509_parse_int( p, 2, &tm->sec ) ); - len -= 2; - } - else - return ( MBEDTLS_ERR_X509_INVALID_DATE ); - - /* - * Parse trailing 'Z' if present - */ - if ( 1 == len && 'Z' == **p ) - { - (*p)++; - len--; - } - - /* - * We should have parsed all characters at this point - */ - if ( 0 != len ) - return ( MBEDTLS_ERR_X509_INVALID_DATE ); - - CHECK( x509_date_is_valid( tm ) ); - - return ( 0 ); -} - -/* - * Time ::= CHOICE { - * utcTime UTCTime, - * generalTime GeneralizedTime } - */ -int mbedtls_x509_get_time( unsigned char **p, const unsigned char *end, - mbedtls_x509_time *tm ) -{ - int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED; - size_t len, year_len; - unsigned char tag; - - if( ( end - *p ) < 1 ) - return( MBEDTLS_ERROR_ADD( MBEDTLS_ERR_X509_INVALID_DATE, - MBEDTLS_ERR_ASN1_OUT_OF_DATA ) ); - - tag = **p; - - if( tag == MBEDTLS_ASN1_UTC_TIME ) - year_len = 2; - else if( tag == MBEDTLS_ASN1_GENERALIZED_TIME ) - year_len = 4; - else - return( MBEDTLS_ERROR_ADD( MBEDTLS_ERR_X509_INVALID_DATE, - MBEDTLS_ERR_ASN1_UNEXPECTED_TAG ) ); - - (*p)++; - ret = mbedtls_asn1_get_len( p, end, &len ); - - if( ret != 0 ) - return( MBEDTLS_ERROR_ADD( MBEDTLS_ERR_X509_INVALID_DATE, ret ) ); - - return x509_parse_time( p, len, year_len, tm ); -} - -int mbedtls_x509_get_sig( unsigned char **p, const unsigned char *end, mbedtls_x509_buf *sig ) -{ - int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED; - size_t len; - int tag_type; - - if( ( end - *p ) < 1 ) - return( MBEDTLS_ERROR_ADD( MBEDTLS_ERR_X509_INVALID_SIGNATURE, - MBEDTLS_ERR_ASN1_OUT_OF_DATA ) ); - - tag_type = **p; - - if( ( ret = mbedtls_asn1_get_bitstring_null( p, end, &len ) ) != 0 ) - return( MBEDTLS_ERROR_ADD( MBEDTLS_ERR_X509_INVALID_SIGNATURE, ret ) ); - - sig->tag = tag_type; - sig->len = len; - sig->p = *p; - - *p += len; - - return( 0 ); -} - -/* - * Get signature algorithm from alg OID and optional parameters - */ -int mbedtls_x509_get_sig_alg( const mbedtls_x509_buf *sig_oid, const mbedtls_x509_buf *sig_params, - mbedtls_md_type_t *md_alg, mbedtls_pk_type_t *pk_alg, - void **sig_opts ) -{ - int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED; - - if( *sig_opts != NULL ) - return( MBEDTLS_ERR_X509_BAD_INPUT_DATA ); - - if( ( ret = mbedtls_oid_get_sig_alg( sig_oid, md_alg, pk_alg ) ) != 0 ) - return( MBEDTLS_ERROR_ADD( MBEDTLS_ERR_X509_UNKNOWN_SIG_ALG, ret ) ); - -#if defined(MBEDTLS_X509_RSASSA_PSS_SUPPORT) - if( *pk_alg == MBEDTLS_PK_RSASSA_PSS ) - { - mbedtls_pk_rsassa_pss_options *pss_opts; - - pss_opts = mbedtls_calloc( 1, sizeof( mbedtls_pk_rsassa_pss_options ) ); - if( pss_opts == NULL ) - return( MBEDTLS_ERR_X509_ALLOC_FAILED ); - - ret = mbedtls_x509_get_rsassa_pss_params( sig_params, - md_alg, - &pss_opts->mgf1_hash_id, - &pss_opts->expected_salt_len ); - if( ret != 0 ) - { - mbedtls_free( pss_opts ); - return( ret ); - } - - *sig_opts = (void *) pss_opts; - } - else -#endif /* MBEDTLS_X509_RSASSA_PSS_SUPPORT */ - { - /* Make sure parameters are absent or NULL */ - if( ( sig_params->tag != MBEDTLS_ASN1_NULL && sig_params->tag != 0 ) || - sig_params->len != 0 ) - return( MBEDTLS_ERR_X509_INVALID_ALG ); - } - - return( 0 ); -} - -/* - * X.509 Extensions (No parsing of extensions, pointer should - * be either manually updated or extensions should be parsed!) - */ -int mbedtls_x509_get_ext( unsigned char **p, const unsigned char *end, - mbedtls_x509_buf *ext, int tag ) -{ - int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED; - size_t len; - - /* Extension structure use EXPLICIT tagging. That is, the actual - * `Extensions` structure is wrapped by a tag-length pair using - * the respective context-specific tag. */ - ret = mbedtls_asn1_get_tag( p, end, &ext->len, - MBEDTLS_ASN1_CONTEXT_SPECIFIC | MBEDTLS_ASN1_CONSTRUCTED | tag ); - if( ret != 0 ) - return( MBEDTLS_ERROR_ADD( MBEDTLS_ERR_X509_INVALID_EXTENSIONS, ret ) ); - - ext->tag = MBEDTLS_ASN1_CONTEXT_SPECIFIC | MBEDTLS_ASN1_CONSTRUCTED | tag; - ext->p = *p; - end = *p + ext->len; - - /* - * Extensions ::= SEQUENCE SIZE (1..MAX) OF Extension - */ - if( ( ret = mbedtls_asn1_get_tag( p, end, &len, - MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE ) ) != 0 ) - return( MBEDTLS_ERROR_ADD( MBEDTLS_ERR_X509_INVALID_EXTENSIONS, ret ) ); - - if( end != *p + len ) - return( MBEDTLS_ERROR_ADD( MBEDTLS_ERR_X509_INVALID_EXTENSIONS, - MBEDTLS_ERR_ASN1_LENGTH_MISMATCH ) ); - - return( 0 ); -} - -/* - * Store the name in printable form into buf; no more - * than size characters will be written - */ -int mbedtls_x509_dn_gets( char *buf, size_t size, const mbedtls_x509_name *dn ) -{ - int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED; - size_t i, n; - unsigned char c, merge = 0; - const mbedtls_x509_name *name; - const char *short_name = NULL; - char s[MBEDTLS_X509_MAX_DN_NAME_SIZE], *p; - - memset( s, 0, sizeof( s ) ); - - name = dn; - p = buf; - n = size; - - while( name != NULL ) - { - if( !name->oid.p ) - { - name = name->next; - continue; - } - - if( name != dn ) - { - ret = mbedtls_snprintf( p, n, merge ? " + " : ", " ); - MBEDTLS_X509_SAFE_SNPRINTF; - } - - ret = mbedtls_oid_get_attr_short_name( &name->oid, &short_name ); - - if( ret == 0 ) - ret = mbedtls_snprintf( p, n, "%s=", short_name ); - else - ret = mbedtls_snprintf( p, n, "\?\?=" ); - MBEDTLS_X509_SAFE_SNPRINTF; - - for( i = 0; i < name->val.len; i++ ) - { - if( i >= sizeof( s ) - 1 ) - break; - - c = name->val.p[i]; - if( c < 32 || c >= 127 ) - s[i] = '?'; - else s[i] = c; - } - s[i] = '\0'; - ret = mbedtls_snprintf( p, n, "%s", s ); - MBEDTLS_X509_SAFE_SNPRINTF; - - merge = name->next_merged; - name = name->next; - } - - return( (int) ( size - n ) ); -} - -/* - * Store the serial in printable form into buf; no more - * than size characters will be written - */ -int mbedtls_x509_serial_gets( char *buf, size_t size, const mbedtls_x509_buf *serial ) -{ - int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED; - size_t i, n, nr; - char *p; - - p = buf; - n = size; - - nr = ( serial->len <= 32 ) - ? serial->len : 28; - - for( i = 0; i < nr; i++ ) - { - if( i == 0 && nr > 1 && serial->p[i] == 0x0 ) - continue; - - ret = mbedtls_snprintf( p, n, "%02X%s", - serial->p[i], ( i < nr - 1 ) ? ":" : "" ); - MBEDTLS_X509_SAFE_SNPRINTF; - } - - if( nr != serial->len ) - { - ret = mbedtls_snprintf( p, n, "...." ); - MBEDTLS_X509_SAFE_SNPRINTF; - } - - return( (int) ( size - n ) ); -} - -/* - * Helper for writing signature algorithms - */ -int mbedtls_x509_sig_alg_gets( char *buf, size_t size, const mbedtls_x509_buf *sig_oid, - mbedtls_pk_type_t pk_alg, mbedtls_md_type_t md_alg, - const void *sig_opts ) -{ - int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED; - char *p = buf; - size_t n = size; - const char *desc = NULL; - - ret = mbedtls_oid_get_sig_alg_desc( sig_oid, &desc ); - if( ret != 0 ) - ret = mbedtls_snprintf( p, n, "???" ); - else - ret = mbedtls_snprintf( p, n, "%s", desc ); - MBEDTLS_X509_SAFE_SNPRINTF; - -#if defined(MBEDTLS_X509_RSASSA_PSS_SUPPORT) - if( pk_alg == MBEDTLS_PK_RSASSA_PSS ) - { - const mbedtls_pk_rsassa_pss_options *pss_opts; - const mbedtls_md_info_t *md_info, *mgf_md_info; - - pss_opts = (const mbedtls_pk_rsassa_pss_options *) sig_opts; - - md_info = mbedtls_md_info_from_type( md_alg ); - mgf_md_info = mbedtls_md_info_from_type( pss_opts->mgf1_hash_id ); - - ret = mbedtls_snprintf( p, n, " (%s, MGF1-%s, 0x%02X)", - md_info ? mbedtls_md_get_name( md_info ) : "???", - mgf_md_info ? mbedtls_md_get_name( mgf_md_info ) : "???", - (unsigned int) pss_opts->expected_salt_len ); - MBEDTLS_X509_SAFE_SNPRINTF; - } -#else - ((void) pk_alg); - ((void) md_alg); - ((void) sig_opts); -#endif /* MBEDTLS_X509_RSASSA_PSS_SUPPORT */ - - return( (int)( size - n ) ); -} - -/* - * Helper for writing "RSA key size", "EC key size", etc - */ -int mbedtls_x509_key_size_helper( char *buf, size_t buf_size, const char *name ) -{ - char *p = buf; - size_t n = buf_size; - int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED; - - ret = mbedtls_snprintf( p, n, "%s key size", name ); - MBEDTLS_X509_SAFE_SNPRINTF; - - return( 0 ); -} - -#if defined(MBEDTLS_HAVE_TIME_DATE) -/* - * Set the time structure to the current time. - * Return 0 on success, non-zero on failure. - */ -static int x509_get_current_time( mbedtls_x509_time *now ) -{ - struct tm *lt, tm_buf; - mbedtls_time_t tt; - int ret = 0; - - tt = mbedtls_time( NULL ); - lt = mbedtls_platform_gmtime_r( &tt, &tm_buf ); - - if( lt == NULL ) - ret = -1; - else - { - now->year = lt->tm_year + 1900; - now->mon = lt->tm_mon + 1; - now->day = lt->tm_mday; - now->hour = lt->tm_hour; - now->min = lt->tm_min; - now->sec = lt->tm_sec; - } - - return( ret ); -} - -/* - * Return 0 if before <= after, 1 otherwise - */ -static int x509_check_time( const mbedtls_x509_time *before, const mbedtls_x509_time *after ) -{ - if( before->year > after->year ) - return( 1 ); - - if( before->year == after->year && - before->mon > after->mon ) - return( 1 ); - - if( before->year == after->year && - before->mon == after->mon && - before->day > after->day ) - return( 1 ); - - if( before->year == after->year && - before->mon == after->mon && - before->day == after->day && - before->hour > after->hour ) - return( 1 ); - - if( before->year == after->year && - before->mon == after->mon && - before->day == after->day && - before->hour == after->hour && - before->min > after->min ) - return( 1 ); - - if( before->year == after->year && - before->mon == after->mon && - before->day == after->day && - before->hour == after->hour && - before->min == after->min && - before->sec > after->sec ) - return( 1 ); - - return( 0 ); -} - -int mbedtls_x509_time_is_past( const mbedtls_x509_time *to ) -{ - mbedtls_x509_time now; - - if( x509_get_current_time( &now ) != 0 ) - return( 1 ); - - return( x509_check_time( &now, to ) ); -} - -int mbedtls_x509_time_is_future( const mbedtls_x509_time *from ) -{ - mbedtls_x509_time now; - - if( x509_get_current_time( &now ) != 0 ) - return( 1 ); - - return( x509_check_time( from, &now ) ); -} - -#else /* MBEDTLS_HAVE_TIME_DATE */ - -int mbedtls_x509_time_is_past( const mbedtls_x509_time *to ) -{ - ((void) to); - return( 0 ); -} - -int mbedtls_x509_time_is_future( const mbedtls_x509_time *from ) -{ - ((void) from); - return( 0 ); -} -#endif /* MBEDTLS_HAVE_TIME_DATE */ - -#if defined(MBEDTLS_SELF_TEST) - -#include "mbedtls/x509_crt.h" -#include "mbedtls/certs.h" - -/* - * Checkup routine - */ -int mbedtls_x509_self_test( int verbose ) -{ - int ret = 0; -#if defined(MBEDTLS_CERTS_C) && defined(MBEDTLS_SHA256_C) - uint32_t flags; - mbedtls_x509_crt cacert; - mbedtls_x509_crt clicert; - - if( verbose != 0 ) - mbedtls_printf( " X.509 certificate load: " ); - - mbedtls_x509_crt_init( &cacert ); - mbedtls_x509_crt_init( &clicert ); - - ret = mbedtls_x509_crt_parse( &clicert, (const unsigned char *) mbedtls_test_cli_crt, - mbedtls_test_cli_crt_len ); - if( ret != 0 ) - { - if( verbose != 0 ) - mbedtls_printf( "failed\n" ); - - goto cleanup; - } - - ret = mbedtls_x509_crt_parse( &cacert, (const unsigned char *) mbedtls_test_ca_crt, - mbedtls_test_ca_crt_len ); - if( ret != 0 ) - { - if( verbose != 0 ) - mbedtls_printf( "failed\n" ); - - goto cleanup; - } - - if( verbose != 0 ) - mbedtls_printf( "passed\n X.509 signature verify: "); - - ret = mbedtls_x509_crt_verify( &clicert, &cacert, NULL, NULL, &flags, NULL, NULL ); - if( ret != 0 ) - { - if( verbose != 0 ) - mbedtls_printf( "failed\n" ); - - goto cleanup; - } - - if( verbose != 0 ) - mbedtls_printf( "passed\n\n"); - -cleanup: - mbedtls_x509_crt_free( &cacert ); - mbedtls_x509_crt_free( &clicert ); -#else - ((void) verbose); -#endif /* MBEDTLS_CERTS_C && MBEDTLS_SHA256_C */ - return( ret ); -} - -#endif /* MBEDTLS_SELF_TEST */ - -#endif /* MBEDTLS_X509_USE_C */ |