| /* |
| * X.509 common functions for parsing and verification |
| * |
| * Copyright (C) 2006-2014, ARM Limited, All Rights Reserved |
| * |
| * This file is part of mbed TLS (https://www.polarssl.org) |
| * |
| * 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. |
| */ |
| /* |
| * 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(POLARSSL_CONFIG_FILE) |
| #include "polarssl/config.h" |
| #else |
| #include POLARSSL_CONFIG_FILE |
| #endif |
| |
| #if defined(POLARSSL_X509_USE_C) |
| |
| #include "polarssl/x509.h" |
| #include "polarssl/asn1.h" |
| #include "polarssl/oid.h" |
| #if defined(POLARSSL_PEM_PARSE_C) |
| #include "polarssl/pem.h" |
| #endif |
| |
| #if defined(POLARSSL_PLATFORM_C) |
| #include "polarssl/platform.h" |
| #else |
| #define polarssl_printf printf |
| #define polarssl_malloc malloc |
| #define polarssl_free free |
| #endif |
| |
| #include <string.h> |
| #include <stdlib.h> |
| #if defined(_WIN32) && !defined(EFIX64) && !defined(EFI32) |
| #include <windows.h> |
| #else |
| #include <time.h> |
| #endif |
| |
| #if defined(EFIX64) || defined(EFI32) |
| #include <stdio.h> |
| #endif |
| |
| #if defined(POLARSSL_FS_IO) |
| #include <stdio.h> |
| #if !defined(_WIN32) |
| #include <sys/types.h> |
| #include <sys/stat.h> |
| #include <dirent.h> |
| #endif |
| #endif |
| |
| /* |
| * CertificateSerialNumber ::= INTEGER |
| */ |
| int x509_get_serial( unsigned char **p, const unsigned char *end, |
| x509_buf *serial ) |
| { |
| int ret; |
| |
| if( ( end - *p ) < 1 ) |
| return( POLARSSL_ERR_X509_INVALID_SERIAL + |
| POLARSSL_ERR_ASN1_OUT_OF_DATA ); |
| |
| if( **p != ( ASN1_CONTEXT_SPECIFIC | ASN1_PRIMITIVE | 2 ) && |
| **p != ASN1_INTEGER ) |
| return( POLARSSL_ERR_X509_INVALID_SERIAL + |
| POLARSSL_ERR_ASN1_UNEXPECTED_TAG ); |
| |
| serial->tag = *(*p)++; |
| |
| if( ( ret = asn1_get_len( p, end, &serial->len ) ) != 0 ) |
| return( POLARSSL_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 x509_get_alg_null( unsigned char **p, const unsigned char *end, |
| x509_buf *alg ) |
| { |
| int ret; |
| |
| if( ( ret = asn1_get_alg_null( p, end, alg ) ) != 0 ) |
| return( POLARSSL_ERR_X509_INVALID_ALG + ret ); |
| |
| return( 0 ); |
| } |
| |
| /* |
| * Parse an algorithm identifier with (optional) paramaters |
| */ |
| int x509_get_alg( unsigned char **p, const unsigned char *end, |
| x509_buf *alg, x509_buf *params ) |
| { |
| int ret; |
| |
| if( ( ret = asn1_get_alg( p, end, alg, params ) ) != 0 ) |
| return( POLARSSL_ERR_X509_INVALID_ALG + ret ); |
| |
| return( 0 ); |
| } |
| |
| #if defined(POLARSSL_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 x509_buf *alg, md_type_t *md_alg ) |
| { |
| int ret; |
| unsigned char *p; |
| const unsigned char *end; |
| x509_buf md_oid; |
| size_t len; |
| |
| /* Make sure we got a SEQUENCE and setup bounds */ |
| if( alg->tag != ( ASN1_CONSTRUCTED | ASN1_SEQUENCE ) ) |
| return( POLARSSL_ERR_X509_INVALID_ALG + |
| POLARSSL_ERR_ASN1_UNEXPECTED_TAG ); |
| |
| p = (unsigned char *) alg->p; |
| end = p + alg->len; |
| |
| if( p >= end ) |
| return( POLARSSL_ERR_X509_INVALID_ALG + |
| POLARSSL_ERR_ASN1_OUT_OF_DATA ); |
| |
| /* Parse md_oid */ |
| md_oid.tag = *p; |
| |
| if( ( ret = asn1_get_tag( &p, end, &md_oid.len, ASN1_OID ) ) != 0 ) |
| return( POLARSSL_ERR_X509_INVALID_ALG + ret ); |
| |
| md_oid.p = p; |
| p += md_oid.len; |
| |
| /* Get md_alg from md_oid */ |
| if( ( ret = oid_get_md_alg( &md_oid, md_alg ) ) != 0 ) |
| return( POLARSSL_ERR_X509_INVALID_ALG + ret ); |
| |
| /* Make sure params is absent of NULL */ |
| if( p == end ) |
| return( 0 ); |
| |
| if( ( ret = asn1_get_tag( &p, end, &len, ASN1_NULL ) ) != 0 || len != 0 ) |
| return( POLARSSL_ERR_X509_INVALID_ALG + ret ); |
| |
| if( p != end ) |
| return( POLARSSL_ERR_X509_INVALID_ALG + |
| POLARSSL_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 x509_get_rsassa_pss_params( const x509_buf *params, |
| md_type_t *md_alg, md_type_t *mgf_md, |
| int *salt_len ) |
| { |
| int ret; |
| unsigned char *p; |
| const unsigned char *end, *end2; |
| size_t len; |
| x509_buf alg_id, alg_params; |
| |
| /* First set everything to defaults */ |
| *md_alg = POLARSSL_MD_SHA1; |
| *mgf_md = POLARSSL_MD_SHA1; |
| *salt_len = 20; |
| |
| /* Make sure params is a SEQUENCE and setup bounds */ |
| if( params->tag != ( ASN1_CONSTRUCTED | ASN1_SEQUENCE ) ) |
| return( POLARSSL_ERR_X509_INVALID_ALG + |
| POLARSSL_ERR_ASN1_UNEXPECTED_TAG ); |
| |
| p = (unsigned char *) params->p; |
| end = p + params->len; |
| |
| if( p == end ) |
| return( 0 ); |
| |
| /* |
| * HashAlgorithm |
| */ |
| if( ( ret = asn1_get_tag( &p, end, &len, |
| ASN1_CONTEXT_SPECIFIC | ASN1_CONSTRUCTED | 0 ) ) == 0 ) |
| { |
| end2 = p + len; |
| |
| /* HashAlgorithm ::= AlgorithmIdentifier (without parameters) */ |
| if( ( ret = x509_get_alg_null( &p, end2, &alg_id ) ) != 0 ) |
| return( ret ); |
| |
| if( ( ret = oid_get_md_alg( &alg_id, md_alg ) ) != 0 ) |
| return( POLARSSL_ERR_X509_INVALID_ALG + ret ); |
| |
| if( p != end2 ) |
| return( POLARSSL_ERR_X509_INVALID_ALG + |
| POLARSSL_ERR_ASN1_LENGTH_MISMATCH ); |
| } |
| else if( ret != POLARSSL_ERR_ASN1_UNEXPECTED_TAG ) |
| return( POLARSSL_ERR_X509_INVALID_ALG + ret ); |
| |
| if( p == end ) |
| return( 0 ); |
| |
| /* |
| * MaskGenAlgorithm |
| */ |
| if( ( ret = asn1_get_tag( &p, end, &len, |
| ASN1_CONTEXT_SPECIFIC | ASN1_CONSTRUCTED | 1 ) ) == 0 ) |
| { |
| end2 = p + len; |
| |
| /* MaskGenAlgorithm ::= AlgorithmIdentifier (params = HashAlgorithm) */ |
| if( ( ret = x509_get_alg( &p, end2, &alg_id, &alg_params ) ) != 0 ) |
| return( ret ); |
| |
| /* Only MFG1 is recognised for now */ |
| if( ! OID_CMP( OID_MGF1, &alg_id ) ) |
| return( POLARSSL_ERR_X509_FEATURE_UNAVAILABLE + |
| POLARSSL_ERR_OID_NOT_FOUND ); |
| |
| /* Parse HashAlgorithm */ |
| if( ( ret = x509_get_hash_alg( &alg_params, mgf_md ) ) != 0 ) |
| return( ret ); |
| |
| if( p != end2 ) |
| return( POLARSSL_ERR_X509_INVALID_ALG + |
| POLARSSL_ERR_ASN1_LENGTH_MISMATCH ); |
| } |
| else if( ret != POLARSSL_ERR_ASN1_UNEXPECTED_TAG ) |
| return( POLARSSL_ERR_X509_INVALID_ALG + ret ); |
| |
| if( p == end ) |
| return( 0 ); |
| |
| /* |
| * salt_len |
| */ |
| if( ( ret = asn1_get_tag( &p, end, &len, |
| ASN1_CONTEXT_SPECIFIC | ASN1_CONSTRUCTED | 2 ) ) == 0 ) |
| { |
| end2 = p + len; |
| |
| if( ( ret = asn1_get_int( &p, end2, salt_len ) ) != 0 ) |
| return( POLARSSL_ERR_X509_INVALID_ALG + ret ); |
| |
| if( p != end2 ) |
| return( POLARSSL_ERR_X509_INVALID_ALG + |
| POLARSSL_ERR_ASN1_LENGTH_MISMATCH ); |
| } |
| else if( ret != POLARSSL_ERR_ASN1_UNEXPECTED_TAG ) |
| return( POLARSSL_ERR_X509_INVALID_ALG + ret ); |
| |
| if( p == end ) |
| return( 0 ); |
| |
| /* |
| * trailer_field (if present, must be 1) |
| */ |
| if( ( ret = asn1_get_tag( &p, end, &len, |
| ASN1_CONTEXT_SPECIFIC | ASN1_CONSTRUCTED | 3 ) ) == 0 ) |
| { |
| int trailer_field; |
| |
| end2 = p + len; |
| |
| if( ( ret = asn1_get_int( &p, end2, &trailer_field ) ) != 0 ) |
| return( POLARSSL_ERR_X509_INVALID_ALG + ret ); |
| |
| if( p != end2 ) |
| return( POLARSSL_ERR_X509_INVALID_ALG + |
| POLARSSL_ERR_ASN1_LENGTH_MISMATCH ); |
| |
| if( trailer_field != 1 ) |
| return( POLARSSL_ERR_X509_INVALID_ALG ); |
| } |
| else if( ret != POLARSSL_ERR_ASN1_UNEXPECTED_TAG ) |
| return( POLARSSL_ERR_X509_INVALID_ALG + ret ); |
| |
| if( p != end ) |
| return( POLARSSL_ERR_X509_INVALID_ALG + |
| POLARSSL_ERR_ASN1_LENGTH_MISMATCH ); |
| |
| return( 0 ); |
| } |
| #endif /* POLARSSL_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, |
| x509_name *cur ) |
| { |
| int ret; |
| size_t len; |
| x509_buf *oid; |
| x509_buf *val; |
| |
| if( ( ret = asn1_get_tag( p, end, &len, |
| ASN1_CONSTRUCTED | ASN1_SEQUENCE ) ) != 0 ) |
| return( POLARSSL_ERR_X509_INVALID_NAME + ret ); |
| |
| if( ( end - *p ) < 1 ) |
| return( POLARSSL_ERR_X509_INVALID_NAME + |
| POLARSSL_ERR_ASN1_OUT_OF_DATA ); |
| |
| oid = &cur->oid; |
| oid->tag = **p; |
| |
| if( ( ret = asn1_get_tag( p, end, &oid->len, ASN1_OID ) ) != 0 ) |
| return( POLARSSL_ERR_X509_INVALID_NAME + ret ); |
| |
| oid->p = *p; |
| *p += oid->len; |
| |
| if( ( end - *p ) < 1 ) |
| return( POLARSSL_ERR_X509_INVALID_NAME + |
| POLARSSL_ERR_ASN1_OUT_OF_DATA ); |
| |
| if( **p != ASN1_BMP_STRING && **p != ASN1_UTF8_STRING && |
| **p != ASN1_T61_STRING && **p != ASN1_PRINTABLE_STRING && |
| **p != ASN1_IA5_STRING && **p != ASN1_UNIVERSAL_STRING ) |
| return( POLARSSL_ERR_X509_INVALID_NAME + |
| POLARSSL_ERR_ASN1_UNEXPECTED_TAG ); |
| |
| val = &cur->val; |
| val->tag = *(*p)++; |
| |
| if( ( ret = asn1_get_len( p, end, &val->len ) ) != 0 ) |
| return( POLARSSL_ERR_X509_INVALID_NAME + ret ); |
| |
| val->p = *p; |
| *p += val->len; |
| |
| cur->next = NULL; |
| |
| return( 0 ); |
| } |
| |
| /* |
| * RelativeDistinguishedName ::= |
| * SET OF AttributeTypeAndValue |
| * |
| * AttributeTypeAndValue ::= SEQUENCE { |
| * type AttributeType, |
| * value AttributeValue } |
| * |
| * AttributeType ::= OBJECT IDENTIFIER |
| * |
| * AttributeValue ::= ANY DEFINED BY AttributeType |
| * |
| * We restrict RelativeDistinguishedName to be a set of 1 element. This is |
| * the most common case, and our x509_name structure currently can't handle |
| * more than that. |
| */ |
| int x509_get_name( unsigned char **p, const unsigned char *end, |
| x509_name *cur ) |
| { |
| int ret; |
| size_t set_len; |
| const unsigned char *end_set; |
| |
| /* don't use recursion, we'd risk stack overflow if not optimized */ |
| while( 1 ) |
| { |
| /* |
| * parse first SET, restricted to 1 element |
| */ |
| if( ( ret = asn1_get_tag( p, end, &set_len, |
| ASN1_CONSTRUCTED | ASN1_SET ) ) != 0 ) |
| return( POLARSSL_ERR_X509_INVALID_NAME + ret ); |
| |
| end_set = *p + set_len; |
| |
| if( ( ret = x509_get_attr_type_value( p, end_set, cur ) ) != 0 ) |
| return( ret ); |
| |
| if( *p != end_set ) |
| return( POLARSSL_ERR_X509_FEATURE_UNAVAILABLE ); |
| |
| /* |
| * continue until end of SEQUENCE is reached |
| */ |
| if( *p == end ) |
| return( 0 ); |
| |
| cur->next = (x509_name *) polarssl_malloc( sizeof( x509_name ) ); |
| |
| if( cur->next == NULL ) |
| return( POLARSSL_ERR_X509_MALLOC_FAILED ); |
| |
| memset( cur->next, 0, sizeof( x509_name ) ); |
| |
| cur = cur->next; |
| } |
| } |
| |
| /* |
| * Time ::= CHOICE { |
| * utcTime UTCTime, |
| * generalTime GeneralizedTime } |
| */ |
| int x509_get_time( unsigned char **p, const unsigned char *end, |
| x509_time *time ) |
| { |
| int ret; |
| size_t len; |
| char date[64]; |
| unsigned char tag; |
| |
| if( ( end - *p ) < 1 ) |
| return( POLARSSL_ERR_X509_INVALID_DATE + |
| POLARSSL_ERR_ASN1_OUT_OF_DATA ); |
| |
| tag = **p; |
| |
| if( tag == ASN1_UTC_TIME ) |
| { |
| (*p)++; |
| ret = asn1_get_len( p, end, &len ); |
| |
| if( ret != 0 ) |
| return( POLARSSL_ERR_X509_INVALID_DATE + ret ); |
| |
| memset( date, 0, sizeof( date ) ); |
| memcpy( date, *p, ( len < sizeof( date ) - 1 ) ? |
| len : sizeof( date ) - 1 ); |
| |
| if( sscanf( date, "%2d%2d%2d%2d%2d%2dZ", |
| &time->year, &time->mon, &time->day, |
| &time->hour, &time->min, &time->sec ) < 5 ) |
| return( POLARSSL_ERR_X509_INVALID_DATE ); |
| |
| time->year += 100 * ( time->year < 50 ); |
| time->year += 1900; |
| |
| *p += len; |
| |
| return( 0 ); |
| } |
| else if( tag == ASN1_GENERALIZED_TIME ) |
| { |
| (*p)++; |
| ret = asn1_get_len( p, end, &len ); |
| |
| if( ret != 0 ) |
| return( POLARSSL_ERR_X509_INVALID_DATE + ret ); |
| |
| memset( date, 0, sizeof( date ) ); |
| memcpy( date, *p, ( len < sizeof( date ) - 1 ) ? |
| len : sizeof( date ) - 1 ); |
| |
| if( sscanf( date, "%4d%2d%2d%2d%2d%2dZ", |
| &time->year, &time->mon, &time->day, |
| &time->hour, &time->min, &time->sec ) < 5 ) |
| return( POLARSSL_ERR_X509_INVALID_DATE ); |
| |
| *p += len; |
| |
| return( 0 ); |
| } |
| else |
| return( POLARSSL_ERR_X509_INVALID_DATE + |
| POLARSSL_ERR_ASN1_UNEXPECTED_TAG ); |
| } |
| |
| int x509_get_sig( unsigned char **p, const unsigned char *end, x509_buf *sig ) |
| { |
| int ret; |
| size_t len; |
| |
| if( ( end - *p ) < 1 ) |
| return( POLARSSL_ERR_X509_INVALID_SIGNATURE + |
| POLARSSL_ERR_ASN1_OUT_OF_DATA ); |
| |
| sig->tag = **p; |
| |
| if( ( ret = asn1_get_bitstring_null( p, end, &len ) ) != 0 ) |
| return( POLARSSL_ERR_X509_INVALID_SIGNATURE + ret ); |
| |
| sig->len = len; |
| sig->p = *p; |
| |
| *p += len; |
| |
| return( 0 ); |
| } |
| |
| /* |
| * Get signature algorithm from alg OID and optional parameters |
| */ |
| int x509_get_sig_alg( const x509_buf *sig_oid, const x509_buf *sig_params, |
| md_type_t *md_alg, pk_type_t *pk_alg, |
| void **sig_opts ) |
| { |
| int ret; |
| |
| if( *sig_opts != NULL ) |
| return( POLARSSL_ERR_X509_BAD_INPUT_DATA ); |
| |
| if( ( ret = oid_get_sig_alg( sig_oid, md_alg, pk_alg ) ) != 0 ) |
| return( POLARSSL_ERR_X509_UNKNOWN_SIG_ALG + ret ); |
| |
| #if defined(POLARSSL_X509_RSASSA_PSS_SUPPORT) |
| if( *pk_alg == POLARSSL_PK_RSASSA_PSS ) |
| { |
| pk_rsassa_pss_options *pss_opts; |
| |
| pss_opts = polarssl_malloc( sizeof( pk_rsassa_pss_options ) ); |
| if( pss_opts == NULL ) |
| return( POLARSSL_ERR_X509_MALLOC_FAILED ); |
| |
| ret = x509_get_rsassa_pss_params( sig_params, |
| md_alg, |
| &pss_opts->mgf1_hash_id, |
| &pss_opts->expected_salt_len ); |
| if( ret != 0 ) |
| { |
| polarssl_free( pss_opts ); |
| return( ret ); |
| } |
| |
| *sig_opts = (void *) pss_opts; |
| } |
| else |
| #endif /* POLARSSL_X509_RSASSA_PSS_SUPPORT */ |
| { |
| /* Make sure parameters are absent or NULL */ |
| if( ( sig_params->tag != ASN1_NULL && sig_params->tag != 0 ) || |
| sig_params->len != 0 ) |
| return( POLARSSL_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 x509_get_ext( unsigned char **p, const unsigned char *end, |
| x509_buf *ext, int tag ) |
| { |
| int ret; |
| size_t len; |
| |
| if( *p == end ) |
| return( 0 ); |
| |
| ext->tag = **p; |
| |
| if( ( ret = asn1_get_tag( p, end, &ext->len, |
| ASN1_CONTEXT_SPECIFIC | ASN1_CONSTRUCTED | tag ) ) != 0 ) |
| return( ret ); |
| |
| ext->p = *p; |
| end = *p + ext->len; |
| |
| /* |
| * Extensions ::= SEQUENCE SIZE (1..MAX) OF Extension |
| * |
| * Extension ::= SEQUENCE { |
| * extnID OBJECT IDENTIFIER, |
| * critical BOOLEAN DEFAULT FALSE, |
| * extnValue OCTET STRING } |
| */ |
| if( ( ret = asn1_get_tag( p, end, &len, |
| ASN1_CONSTRUCTED | ASN1_SEQUENCE ) ) != 0 ) |
| return( POLARSSL_ERR_X509_INVALID_EXTENSIONS + ret ); |
| |
| if( end != *p + len ) |
| return( POLARSSL_ERR_X509_INVALID_EXTENSIONS + |
| POLARSSL_ERR_ASN1_LENGTH_MISMATCH ); |
| |
| return( 0 ); |
| } |
| |
| #if defined(_MSC_VER) && !defined snprintf && !defined(EFIX64) && \ |
| !defined(EFI32) |
| #include <stdarg.h> |
| |
| #if !defined vsnprintf |
| #define vsnprintf _vsnprintf |
| #endif // vsnprintf |
| |
| /* |
| * Windows _snprintf and _vsnprintf are not compatible to linux versions. |
| * Result value is not size of buffer needed, but -1 if no fit is possible. |
| * |
| * This fuction tries to 'fix' this by at least suggesting enlarging the |
| * size by 20. |
| */ |
| static int compat_snprintf( char *str, size_t size, const char *format, ... ) |
| { |
| va_list ap; |
| int res = -1; |
| |
| va_start( ap, format ); |
| |
| res = vsnprintf( str, size, format, ap ); |
| |
| va_end( ap ); |
| |
| // No quick fix possible |
| if( res < 0 ) |
| return( (int) size + 20 ); |
| |
| return( res ); |
| } |
| |
| #define snprintf compat_snprintf |
| #endif /* _MSC_VER && !snprintf && !EFIX64 && !EFI32 */ |
| |
| #define POLARSSL_ERR_DEBUG_BUF_TOO_SMALL -2 |
| |
| #define SAFE_SNPRINTF() \ |
| { \ |
| if( ret == -1 ) \ |
| return( -1 ); \ |
| \ |
| if( (unsigned int) ret > n ) { \ |
| p[n - 1] = '\0'; \ |
| return( POLARSSL_ERR_DEBUG_BUF_TOO_SMALL ); \ |
| } \ |
| \ |
| n -= (unsigned int) ret; \ |
| p += (unsigned int) ret; \ |
| } |
| |
| /* |
| * Store the name in printable form into buf; no more |
| * than size characters will be written |
| */ |
| int x509_dn_gets( char *buf, size_t size, const x509_name *dn ) |
| { |
| int ret; |
| size_t i, n; |
| unsigned char c; |
| const x509_name *name; |
| const char *short_name = NULL; |
| char s[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 = snprintf( p, n, ", " ); |
| SAFE_SNPRINTF(); |
| } |
| |
| ret = oid_get_attr_short_name( &name->oid, &short_name ); |
| |
| if( ret == 0 ) |
| ret = snprintf( p, n, "%s=", short_name ); |
| else |
| ret = snprintf( p, n, "\?\?=" ); |
| 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 || ( c > 128 && c < 160 ) ) |
| s[i] = '?'; |
| else s[i] = c; |
| } |
| s[i] = '\0'; |
| ret = snprintf( p, n, "%s", s ); |
| SAFE_SNPRINTF(); |
| name = name->next; |
| } |
| |
| return( (int) ( size - n ) ); |
| } |
| |
| /* |
| * Store the serial in printable form into buf; no more |
| * than size characters will be written |
| */ |
| int x509_serial_gets( char *buf, size_t size, const x509_buf *serial ) |
| { |
| int ret; |
| 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 = snprintf( p, n, "%02X%s", |
| serial->p[i], ( i < nr - 1 ) ? ":" : "" ); |
| SAFE_SNPRINTF(); |
| } |
| |
| if( nr != serial->len ) |
| { |
| ret = snprintf( p, n, "...." ); |
| SAFE_SNPRINTF(); |
| } |
| |
| return( (int) ( size - n ) ); |
| } |
| |
| /* |
| * Helper for writing signature algorithms |
| */ |
| int x509_sig_alg_gets( char *buf, size_t size, const x509_buf *sig_oid, |
| pk_type_t pk_alg, md_type_t md_alg, |
| const void *sig_opts ) |
| { |
| int ret; |
| char *p = buf; |
| size_t n = size; |
| const char *desc = NULL; |
| |
| ret = oid_get_sig_alg_desc( sig_oid, &desc ); |
| if( ret != 0 ) |
| ret = snprintf( p, n, "???" ); |
| else |
| ret = snprintf( p, n, "%s", desc ); |
| SAFE_SNPRINTF(); |
| |
| #if defined(POLARSSL_X509_RSASSA_PSS_SUPPORT) |
| if( pk_alg == POLARSSL_PK_RSASSA_PSS ) |
| { |
| const pk_rsassa_pss_options *pss_opts; |
| const md_info_t *md_info, *mgf_md_info; |
| |
| pss_opts = (const pk_rsassa_pss_options *) sig_opts; |
| |
| md_info = md_info_from_type( md_alg ); |
| mgf_md_info = md_info_from_type( pss_opts->mgf1_hash_id ); |
| |
| ret = snprintf( p, n, " (%s, MGF1-%s, 0x%02X)", |
| md_info ? md_info->name : "???", |
| mgf_md_info ? mgf_md_info->name : "???", |
| pss_opts->expected_salt_len ); |
| SAFE_SNPRINTF(); |
| } |
| #else |
| ((void) pk_alg); |
| ((void) md_alg); |
| ((void) sig_opts); |
| #endif /* POLARSSL_X509_RSASSA_PSS_SUPPORT */ |
| |
| return( (int)( size - n ) ); |
| } |
| |
| /* |
| * Helper for writing "RSA key size", "EC key size", etc |
| */ |
| int x509_key_size_helper( char *buf, size_t size, const char *name ) |
| { |
| char *p = buf; |
| size_t n = size; |
| int ret; |
| |
| if( strlen( name ) + sizeof( " key size" ) > size ) |
| return( POLARSSL_ERR_DEBUG_BUF_TOO_SMALL ); |
| |
| ret = snprintf( p, n, "%s key size", name ); |
| SAFE_SNPRINTF(); |
| |
| return( 0 ); |
| } |
| |
| /* |
| * Return an informational string describing the given OID |
| */ |
| const char *x509_oid_get_description( x509_buf *oid ) |
| { |
| const char *desc = NULL; |
| int ret; |
| |
| ret = oid_get_extended_key_usage( oid, &desc ); |
| |
| if( ret != 0 ) |
| return( NULL ); |
| |
| return( desc ); |
| } |
| |
| /* Return the x.y.z.... style numeric string for the given OID */ |
| int x509_oid_get_numeric_string( char *buf, size_t size, x509_buf *oid ) |
| { |
| return oid_get_numeric_string( buf, size, oid ); |
| } |
| |
| /* |
| * Return 0 if the x509_time is still valid, or 1 otherwise. |
| */ |
| #if defined(POLARSSL_HAVE_TIME) |
| |
| static void x509_get_current_time( x509_time *now ) |
| { |
| #if defined(_WIN32) && !defined(EFIX64) && !defined(EFI32) |
| SYSTEMTIME st; |
| |
| GetSystemTime( &st ); |
| |
| now->year = st.wYear; |
| now->mon = st.wMonth; |
| now->day = st.wDay; |
| now->hour = st.wHour; |
| now->min = st.wMinute; |
| now->sec = st.wSecond; |
| #else |
| struct tm lt; |
| time_t tt; |
| |
| tt = time( NULL ); |
| gmtime_r( &tt, < ); |
| |
| 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; |
| #endif /* _WIN32 && !EFIX64 && !EFI32 */ |
| } |
| |
| /* |
| * Return 0 if before <= after, 1 otherwise |
| */ |
| static int x509_check_time( const x509_time *before, const 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 x509_time_expired( const x509_time *to ) |
| { |
| x509_time now; |
| |
| x509_get_current_time( &now ); |
| |
| return( x509_check_time( &now, to ) ); |
| } |
| |
| int x509_time_future( const x509_time *from ) |
| { |
| x509_time now; |
| |
| x509_get_current_time( &now ); |
| |
| return( x509_check_time( from, &now ) ); |
| } |
| |
| #else /* POLARSSL_HAVE_TIME */ |
| |
| int x509_time_expired( const x509_time *to ) |
| { |
| ((void) to); |
| return( 0 ); |
| } |
| |
| int x509_time_future( const x509_time *from ) |
| { |
| ((void) from); |
| return( 0 ); |
| } |
| #endif /* POLARSSL_HAVE_TIME */ |
| |
| #if defined(POLARSSL_SELF_TEST) |
| |
| #include "polarssl/x509_crt.h" |
| #include "polarssl/certs.h" |
| |
| /* |
| * Checkup routine |
| */ |
| int x509_self_test( int verbose ) |
| { |
| #if defined(POLARSSL_CERTS_C) && defined(POLARSSL_SHA1_C) |
| int ret; |
| int flags; |
| x509_crt cacert; |
| x509_crt clicert; |
| |
| if( verbose != 0 ) |
| polarssl_printf( " X.509 certificate load: " ); |
| |
| x509_crt_init( &clicert ); |
| |
| ret = x509_crt_parse( &clicert, (const unsigned char *) test_cli_crt, |
| strlen( test_cli_crt ) ); |
| if( ret != 0 ) |
| { |
| if( verbose != 0 ) |
| polarssl_printf( "failed\n" ); |
| |
| return( ret ); |
| } |
| |
| x509_crt_init( &cacert ); |
| |
| ret = x509_crt_parse( &cacert, (const unsigned char *) test_ca_crt, |
| strlen( test_ca_crt ) ); |
| if( ret != 0 ) |
| { |
| if( verbose != 0 ) |
| polarssl_printf( "failed\n" ); |
| |
| return( ret ); |
| } |
| |
| if( verbose != 0 ) |
| polarssl_printf( "passed\n X.509 signature verify: "); |
| |
| ret = x509_crt_verify( &clicert, &cacert, NULL, NULL, &flags, NULL, NULL ); |
| if( ret != 0 ) |
| { |
| if( verbose != 0 ) |
| polarssl_printf( "failed\n" ); |
| |
| polarssl_printf( "ret = %d, &flags = %04x\n", ret, flags ); |
| |
| return( ret ); |
| } |
| |
| if( verbose != 0 ) |
| polarssl_printf( "passed\n\n"); |
| |
| x509_crt_free( &cacert ); |
| x509_crt_free( &clicert ); |
| |
| return( 0 ); |
| #else |
| ((void) verbose); |
| return( POLARSSL_ERR_X509_FEATURE_UNAVAILABLE ); |
| #endif /* POLARSSL_CERTS_C && POLARSSL_SHA1_C */ |
| } |
| |
| #endif /* POLARSSL_SELF_TEST */ |
| |
| #endif /* POLARSSL_X509_USE_C */ |