mbed TLS upgraded to 2.6.0
Fork of mbedtls by
library/x509_create.c
- Committer:
- Jasper Wallace
- Date:
- 2017-09-29
- Revision:
- 2:bbdeda018a3c
- Parent:
- 0:cdf462088d13
File content as of revision 2:bbdeda018a3c:
/* * X.509 base functions for creating certificates / CSRs * * Copyright (C) 2006-2015, ARM Limited, All Rights Reserved * 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. * * This file is part of mbed TLS (https://tls.mbed.org) */ #if !defined(MBEDTLS_CONFIG_FILE) #include "mbedtls/config.h" #else #include MBEDTLS_CONFIG_FILE #endif #if defined(MBEDTLS_X509_CREATE_C) #include "mbedtls/x509.h" #include "mbedtls/asn1write.h" #include "mbedtls/oid.h" #include <string.h> typedef struct { const char *name; size_t name_len; const char*oid; } x509_attr_descriptor_t; #define ADD_STRLEN( s ) s, sizeof( s ) - 1 static const x509_attr_descriptor_t x509_attrs[] = { { ADD_STRLEN( "CN" ), MBEDTLS_OID_AT_CN }, { ADD_STRLEN( "commonName" ), MBEDTLS_OID_AT_CN }, { ADD_STRLEN( "C" ), MBEDTLS_OID_AT_COUNTRY }, { ADD_STRLEN( "countryName" ), MBEDTLS_OID_AT_COUNTRY }, { ADD_STRLEN( "O" ), MBEDTLS_OID_AT_ORGANIZATION }, { ADD_STRLEN( "organizationName" ), MBEDTLS_OID_AT_ORGANIZATION }, { ADD_STRLEN( "L" ), MBEDTLS_OID_AT_LOCALITY }, { ADD_STRLEN( "locality" ), MBEDTLS_OID_AT_LOCALITY }, { ADD_STRLEN( "R" ), MBEDTLS_OID_PKCS9_EMAIL }, { ADD_STRLEN( "OU" ), MBEDTLS_OID_AT_ORG_UNIT }, { ADD_STRLEN( "organizationalUnitName" ), MBEDTLS_OID_AT_ORG_UNIT }, { ADD_STRLEN( "ST" ), MBEDTLS_OID_AT_STATE }, { ADD_STRLEN( "stateOrProvinceName" ), MBEDTLS_OID_AT_STATE }, { ADD_STRLEN( "emailAddress" ), MBEDTLS_OID_PKCS9_EMAIL }, { ADD_STRLEN( "serialNumber" ), MBEDTLS_OID_AT_SERIAL_NUMBER }, { ADD_STRLEN( "postalAddress" ), MBEDTLS_OID_AT_POSTAL_ADDRESS }, { ADD_STRLEN( "postalCode" ), MBEDTLS_OID_AT_POSTAL_CODE }, { ADD_STRLEN( "dnQualifier" ), MBEDTLS_OID_AT_DN_QUALIFIER }, { ADD_STRLEN( "title" ), MBEDTLS_OID_AT_TITLE }, { ADD_STRLEN( "surName" ), MBEDTLS_OID_AT_SUR_NAME }, { ADD_STRLEN( "SN" ), MBEDTLS_OID_AT_SUR_NAME }, { ADD_STRLEN( "givenName" ), MBEDTLS_OID_AT_GIVEN_NAME }, { ADD_STRLEN( "GN" ), MBEDTLS_OID_AT_GIVEN_NAME }, { ADD_STRLEN( "initials" ), MBEDTLS_OID_AT_INITIALS }, { ADD_STRLEN( "pseudonym" ), MBEDTLS_OID_AT_PSEUDONYM }, { ADD_STRLEN( "generationQualifier" ), MBEDTLS_OID_AT_GENERATION_QUALIFIER }, { ADD_STRLEN( "domainComponent" ), MBEDTLS_OID_DOMAIN_COMPONENT }, { ADD_STRLEN( "DC" ), MBEDTLS_OID_DOMAIN_COMPONENT }, { NULL, 0, NULL } }; static const char *x509_at_oid_from_name( const char *name, size_t name_len ) { const x509_attr_descriptor_t *cur; for( cur = x509_attrs; cur->name != NULL; cur++ ) if( cur->name_len == name_len && strncmp( cur->name, name, name_len ) == 0 ) break; return( cur->oid ); } int mbedtls_x509_string_to_names( mbedtls_asn1_named_data **head, const char *name ) { int ret = 0; const char *s = name, *c = s; const char *end = s + strlen( s ); const char *oid = NULL; int in_tag = 1; char data[MBEDTLS_X509_MAX_DN_NAME_SIZE]; char *d = data; /* Clear existing chain if present */ mbedtls_asn1_free_named_data_list( head ); while( c <= end ) { if( in_tag && *c == '=' ) { if( ( oid = x509_at_oid_from_name( s, c - s ) ) == NULL ) { ret = MBEDTLS_ERR_X509_UNKNOWN_OID; goto exit; } s = c + 1; in_tag = 0; d = data; } if( !in_tag && *c == '\\' && c != end ) { c++; /* Check for valid escaped characters */ if( c == end || *c != ',' ) { ret = MBEDTLS_ERR_X509_INVALID_NAME; goto exit; } } else if( !in_tag && ( *c == ',' || c == end ) ) { if( mbedtls_asn1_store_named_data( head, oid, strlen( oid ), (unsigned char *) data, d - data ) == NULL ) { return( MBEDTLS_ERR_X509_ALLOC_FAILED ); } while( c < end && *(c + 1) == ' ' ) c++; s = c + 1; in_tag = 1; } if( !in_tag && s != c + 1 ) { *(d++) = *c; if( d - data == MBEDTLS_X509_MAX_DN_NAME_SIZE ) { ret = MBEDTLS_ERR_X509_INVALID_NAME; goto exit; } } c++; } exit: return( ret ); } /* The first byte of the value in the mbedtls_asn1_named_data structure is reserved * to store the critical boolean for us */ int mbedtls_x509_set_extension( mbedtls_asn1_named_data **head, const char *oid, size_t oid_len, int critical, const unsigned char *val, size_t val_len ) { mbedtls_asn1_named_data *cur; if( ( cur = mbedtls_asn1_store_named_data( head, oid, oid_len, NULL, val_len + 1 ) ) == NULL ) { return( MBEDTLS_ERR_X509_ALLOC_FAILED ); } cur->val.p[0] = critical; memcpy( cur->val.p + 1, val, val_len ); return( 0 ); } /* * RelativeDistinguishedName ::= * SET OF AttributeTypeAndValue * * AttributeTypeAndValue ::= SEQUENCE { * type AttributeType, * value AttributeValue } * * AttributeType ::= OBJECT IDENTIFIER * * AttributeValue ::= ANY DEFINED BY AttributeType */ static int x509_write_name( unsigned char **p, unsigned char *start, const char *oid, size_t oid_len, const unsigned char *name, size_t name_len ) { int ret; size_t len = 0; // Write PrintableString for all except MBEDTLS_OID_PKCS9_EMAIL // if( MBEDTLS_OID_SIZE( MBEDTLS_OID_PKCS9_EMAIL ) == oid_len && memcmp( oid, MBEDTLS_OID_PKCS9_EMAIL, oid_len ) == 0 ) { MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_ia5_string( p, start, (const char *) name, name_len ) ); } else { MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_printable_string( p, start, (const char *) name, name_len ) ); } // Write OID // MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_oid( p, start, oid, oid_len ) ); MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_len( p, start, len ) ); MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_tag( p, start, MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE ) ); MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_len( p, start, len ) ); MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_tag( p, start, MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SET ) ); return( (int) len ); } int mbedtls_x509_write_names( unsigned char **p, unsigned char *start, mbedtls_asn1_named_data *first ) { int ret; size_t len = 0; mbedtls_asn1_named_data *cur = first; while( cur != NULL ) { MBEDTLS_ASN1_CHK_ADD( len, x509_write_name( p, start, (char *) cur->oid.p, cur->oid.len, cur->val.p, cur->val.len ) ); cur = cur->next; } MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_len( p, start, len ) ); MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_tag( p, start, MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE ) ); return( (int) len ); } int mbedtls_x509_write_sig( unsigned char **p, unsigned char *start, const char *oid, size_t oid_len, unsigned char *sig, size_t size ) { int ret; size_t len = 0; if( *p < start || (size_t)( *p - start ) < size ) return( MBEDTLS_ERR_ASN1_BUF_TOO_SMALL ); len = size; (*p) -= len; memcpy( *p, sig, len ); if( *p - start < 1 ) return( MBEDTLS_ERR_ASN1_BUF_TOO_SMALL ); *--(*p) = 0; len += 1; MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_len( p, start, len ) ); MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_tag( p, start, MBEDTLS_ASN1_BIT_STRING ) ); // Write OID // MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_algorithm_identifier( p, start, oid, oid_len, 0 ) ); return( (int) len ); } static int x509_write_extension( unsigned char **p, unsigned char *start, mbedtls_asn1_named_data *ext ) { int ret; size_t len = 0; MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_raw_buffer( p, start, ext->val.p + 1, ext->val.len - 1 ) ); MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_len( p, start, ext->val.len - 1 ) ); MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_tag( p, start, MBEDTLS_ASN1_OCTET_STRING ) ); if( ext->val.p[0] != 0 ) { MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_bool( p, start, 1 ) ); } MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_raw_buffer( p, start, ext->oid.p, ext->oid.len ) ); MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_len( p, start, ext->oid.len ) ); MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_tag( p, start, MBEDTLS_ASN1_OID ) ); MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_len( p, start, len ) ); MBEDTLS_ASN1_CHK_ADD( len, mbedtls_asn1_write_tag( p, start, MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_SEQUENCE ) ); return( (int) len ); } /* * Extension ::= SEQUENCE { * extnID OBJECT IDENTIFIER, * critical BOOLEAN DEFAULT FALSE, * extnValue OCTET STRING * -- contains the DER encoding of an ASN.1 value * -- corresponding to the extension type identified * -- by extnID * } */ int mbedtls_x509_write_extensions( unsigned char **p, unsigned char *start, mbedtls_asn1_named_data *first ) { int ret; size_t len = 0; mbedtls_asn1_named_data *cur_ext = first; while( cur_ext != NULL ) { MBEDTLS_ASN1_CHK_ADD( len, x509_write_extension( p, start, cur_ext ) ); cur_ext = cur_ext->next; } return( (int) len ); } #endif /* MBEDTLS_X509_CREATE_C */