Hannes Tschofenig / Mbed 2 deprecated aes-gcm-test-program

Example program to test AES-GCM functionality. Used for a workshop

Dependencies:   mbed

SSL/library/asn1parse.c@0:796d0f61a05b, 2018-09-27 (annotated)

Committer:
HannesTschofenig
Date:
Thu Sep 27 06:34:22 2018 +0000
Revision:
0:796d0f61a05b
Example AES-GCM test program

Who changed what in which revision?

UserRevisionLine numberNew contents of line
HannesTschofenig 0:796d0f61a05b 1 /*
HannesTschofenig 0:796d0f61a05b 2 * Generic ASN.1 parsing
HannesTschofenig 0:796d0f61a05b 3 *
HannesTschofenig 0:796d0f61a05b 4 * Copyright (C) 2006-2014, Brainspark B.V.
HannesTschofenig 0:796d0f61a05b 5 *
HannesTschofenig 0:796d0f61a05b 6 * This file is part of PolarSSL (http://www.polarssl.org)
HannesTschofenig 0:796d0f61a05b 7 * Lead Maintainer: Paul Bakker <polarssl_maintainer at polarssl.org>
HannesTschofenig 0:796d0f61a05b 8 *
HannesTschofenig 0:796d0f61a05b 9 * All rights reserved.
HannesTschofenig 0:796d0f61a05b 10 *
HannesTschofenig 0:796d0f61a05b 11 * This program is free software; you can redistribute it and/or modify
HannesTschofenig 0:796d0f61a05b 12 * it under the terms of the GNU General Public License as published by
HannesTschofenig 0:796d0f61a05b 13 * the Free Software Foundation; either version 2 of the License, or
HannesTschofenig 0:796d0f61a05b 14 * (at your option) any later version.
HannesTschofenig 0:796d0f61a05b 15 *
HannesTschofenig 0:796d0f61a05b 16 * This program is distributed in the hope that it will be useful,
HannesTschofenig 0:796d0f61a05b 17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
HannesTschofenig 0:796d0f61a05b 18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
HannesTschofenig 0:796d0f61a05b 19 * GNU General Public License for more details.
HannesTschofenig 0:796d0f61a05b 20 *
HannesTschofenig 0:796d0f61a05b 21 * You should have received a copy of the GNU General Public License along
HannesTschofenig 0:796d0f61a05b 22 * with this program; if not, write to the Free Software Foundation, Inc.,
HannesTschofenig 0:796d0f61a05b 23 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
HannesTschofenig 0:796d0f61a05b 24 */
HannesTschofenig 0:796d0f61a05b 25
HannesTschofenig 0:796d0f61a05b 26 #if !defined(POLARSSL_CONFIG_FILE)
HannesTschofenig 0:796d0f61a05b 27 #include "polarssl/config.h"
HannesTschofenig 0:796d0f61a05b 28 #else
HannesTschofenig 0:796d0f61a05b 29 #include POLARSSL_CONFIG_FILE
HannesTschofenig 0:796d0f61a05b 30 #endif
HannesTschofenig 0:796d0f61a05b 31
HannesTschofenig 0:796d0f61a05b 32 #if defined(POLARSSL_ASN1_PARSE_C)
HannesTschofenig 0:796d0f61a05b 33
HannesTschofenig 0:796d0f61a05b 34 #include "polarssl/asn1.h"
HannesTschofenig 0:796d0f61a05b 35
HannesTschofenig 0:796d0f61a05b 36 #if defined(POLARSSL_BIGNUM_C)
HannesTschofenig 0:796d0f61a05b 37 #include "polarssl/bignum.h"
HannesTschofenig 0:796d0f61a05b 38 #endif
HannesTschofenig 0:796d0f61a05b 39
HannesTschofenig 0:796d0f61a05b 40 #if defined(POLARSSL_PLATFORM_C)
HannesTschofenig 0:796d0f61a05b 41 #include "polarssl/platform.h"
HannesTschofenig 0:796d0f61a05b 42 #else
HannesTschofenig 0:796d0f61a05b 43 #define polarssl_malloc malloc
HannesTschofenig 0:796d0f61a05b 44 #define polarssl_free free
HannesTschofenig 0:796d0f61a05b 45 #endif
HannesTschofenig 0:796d0f61a05b 46
HannesTschofenig 0:796d0f61a05b 47 #include <string.h>
HannesTschofenig 0:796d0f61a05b 48 #include <stdlib.h>
HannesTschofenig 0:796d0f61a05b 49
HannesTschofenig 0:796d0f61a05b 50 /*
HannesTschofenig 0:796d0f61a05b 51 * ASN.1 DER decoding routines
HannesTschofenig 0:796d0f61a05b 52 */
HannesTschofenig 0:796d0f61a05b 53 int asn1_get_len( unsigned char **p,
HannesTschofenig 0:796d0f61a05b 54 const unsigned char *end,
HannesTschofenig 0:796d0f61a05b 55 size_t *len )
HannesTschofenig 0:796d0f61a05b 56 {
HannesTschofenig 0:796d0f61a05b 57 if( ( end - *p ) < 1 )
HannesTschofenig 0:796d0f61a05b 58 return( POLARSSL_ERR_ASN1_OUT_OF_DATA );
HannesTschofenig 0:796d0f61a05b 59
HannesTschofenig 0:796d0f61a05b 60 if( ( **p & 0x80 ) == 0 )
HannesTschofenig 0:796d0f61a05b 61 *len = *(*p)++;
HannesTschofenig 0:796d0f61a05b 62 else
HannesTschofenig 0:796d0f61a05b 63 {
HannesTschofenig 0:796d0f61a05b 64 switch( **p & 0x7F )
HannesTschofenig 0:796d0f61a05b 65 {
HannesTschofenig 0:796d0f61a05b 66 case 1:
HannesTschofenig 0:796d0f61a05b 67 if( ( end - *p ) < 2 )
HannesTschofenig 0:796d0f61a05b 68 return( POLARSSL_ERR_ASN1_OUT_OF_DATA );
HannesTschofenig 0:796d0f61a05b 69
HannesTschofenig 0:796d0f61a05b 70 *len = (*p)[1];
HannesTschofenig 0:796d0f61a05b 71 (*p) += 2;
HannesTschofenig 0:796d0f61a05b 72 break;
HannesTschofenig 0:796d0f61a05b 73
HannesTschofenig 0:796d0f61a05b 74 case 2:
HannesTschofenig 0:796d0f61a05b 75 if( ( end - *p ) < 3 )
HannesTschofenig 0:796d0f61a05b 76 return( POLARSSL_ERR_ASN1_OUT_OF_DATA );
HannesTschofenig 0:796d0f61a05b 77
HannesTschofenig 0:796d0f61a05b 78 *len = ( (*p)[1] << 8 ) | (*p)[2];
HannesTschofenig 0:796d0f61a05b 79 (*p) += 3;
HannesTschofenig 0:796d0f61a05b 80 break;
HannesTschofenig 0:796d0f61a05b 81
HannesTschofenig 0:796d0f61a05b 82 case 3:
HannesTschofenig 0:796d0f61a05b 83 if( ( end - *p ) < 4 )
HannesTschofenig 0:796d0f61a05b 84 return( POLARSSL_ERR_ASN1_OUT_OF_DATA );
HannesTschofenig 0:796d0f61a05b 85
HannesTschofenig 0:796d0f61a05b 86 *len = ( (*p)[1] << 16 ) | ( (*p)[2] << 8 ) | (*p)[3];
HannesTschofenig 0:796d0f61a05b 87 (*p) += 4;
HannesTschofenig 0:796d0f61a05b 88 break;
HannesTschofenig 0:796d0f61a05b 89
HannesTschofenig 0:796d0f61a05b 90 case 4:
HannesTschofenig 0:796d0f61a05b 91 if( ( end - *p ) < 5 )
HannesTschofenig 0:796d0f61a05b 92 return( POLARSSL_ERR_ASN1_OUT_OF_DATA );
HannesTschofenig 0:796d0f61a05b 93
HannesTschofenig 0:796d0f61a05b 94 *len = ( (*p)[1] << 24 ) | ( (*p)[2] << 16 ) | ( (*p)[3] << 8 ) |
HannesTschofenig 0:796d0f61a05b 95 (*p)[4];
HannesTschofenig 0:796d0f61a05b 96 (*p) += 5;
HannesTschofenig 0:796d0f61a05b 97 break;
HannesTschofenig 0:796d0f61a05b 98
HannesTschofenig 0:796d0f61a05b 99 default:
HannesTschofenig 0:796d0f61a05b 100 return( POLARSSL_ERR_ASN1_INVALID_LENGTH );
HannesTschofenig 0:796d0f61a05b 101 }
HannesTschofenig 0:796d0f61a05b 102 }
HannesTschofenig 0:796d0f61a05b 103
HannesTschofenig 0:796d0f61a05b 104 if( *len > (size_t) ( end - *p ) )
HannesTschofenig 0:796d0f61a05b 105 return( POLARSSL_ERR_ASN1_OUT_OF_DATA );
HannesTschofenig 0:796d0f61a05b 106
HannesTschofenig 0:796d0f61a05b 107 return( 0 );
HannesTschofenig 0:796d0f61a05b 108 }
HannesTschofenig 0:796d0f61a05b 109
HannesTschofenig 0:796d0f61a05b 110 int asn1_get_tag( unsigned char **p,
HannesTschofenig 0:796d0f61a05b 111 const unsigned char *end,
HannesTschofenig 0:796d0f61a05b 112 size_t *len, int tag )
HannesTschofenig 0:796d0f61a05b 113 {
HannesTschofenig 0:796d0f61a05b 114 if( ( end - *p ) < 1 )
HannesTschofenig 0:796d0f61a05b 115 return( POLARSSL_ERR_ASN1_OUT_OF_DATA );
HannesTschofenig 0:796d0f61a05b 116
HannesTschofenig 0:796d0f61a05b 117 if( **p != tag )
HannesTschofenig 0:796d0f61a05b 118 return( POLARSSL_ERR_ASN1_UNEXPECTED_TAG );
HannesTschofenig 0:796d0f61a05b 119
HannesTschofenig 0:796d0f61a05b 120 (*p)++;
HannesTschofenig 0:796d0f61a05b 121
HannesTschofenig 0:796d0f61a05b 122 return( asn1_get_len( p, end, len ) );
HannesTschofenig 0:796d0f61a05b 123 }
HannesTschofenig 0:796d0f61a05b 124
HannesTschofenig 0:796d0f61a05b 125 int asn1_get_bool( unsigned char **p,
HannesTschofenig 0:796d0f61a05b 126 const unsigned char *end,
HannesTschofenig 0:796d0f61a05b 127 int *val )
HannesTschofenig 0:796d0f61a05b 128 {
HannesTschofenig 0:796d0f61a05b 129 int ret;
HannesTschofenig 0:796d0f61a05b 130 size_t len;
HannesTschofenig 0:796d0f61a05b 131
HannesTschofenig 0:796d0f61a05b 132 if( ( ret = asn1_get_tag( p, end, &len, ASN1_BOOLEAN ) ) != 0 )
HannesTschofenig 0:796d0f61a05b 133 return( ret );
HannesTschofenig 0:796d0f61a05b 134
HannesTschofenig 0:796d0f61a05b 135 if( len != 1 )
HannesTschofenig 0:796d0f61a05b 136 return( POLARSSL_ERR_ASN1_INVALID_LENGTH );
HannesTschofenig 0:796d0f61a05b 137
HannesTschofenig 0:796d0f61a05b 138 *val = ( **p != 0 ) ? 1 : 0;
HannesTschofenig 0:796d0f61a05b 139 (*p)++;
HannesTschofenig 0:796d0f61a05b 140
HannesTschofenig 0:796d0f61a05b 141 return( 0 );
HannesTschofenig 0:796d0f61a05b 142 }
HannesTschofenig 0:796d0f61a05b 143
HannesTschofenig 0:796d0f61a05b 144 int asn1_get_int( unsigned char **p,
HannesTschofenig 0:796d0f61a05b 145 const unsigned char *end,
HannesTschofenig 0:796d0f61a05b 146 int *val )
HannesTschofenig 0:796d0f61a05b 147 {
HannesTschofenig 0:796d0f61a05b 148 int ret;
HannesTschofenig 0:796d0f61a05b 149 size_t len;
HannesTschofenig 0:796d0f61a05b 150
HannesTschofenig 0:796d0f61a05b 151 if( ( ret = asn1_get_tag( p, end, &len, ASN1_INTEGER ) ) != 0 )
HannesTschofenig 0:796d0f61a05b 152 return( ret );
HannesTschofenig 0:796d0f61a05b 153
HannesTschofenig 0:796d0f61a05b 154 if( len > sizeof( int ) || ( **p & 0x80 ) != 0 )
HannesTschofenig 0:796d0f61a05b 155 return( POLARSSL_ERR_ASN1_INVALID_LENGTH );
HannesTschofenig 0:796d0f61a05b 156
HannesTschofenig 0:796d0f61a05b 157 *val = 0;
HannesTschofenig 0:796d0f61a05b 158
HannesTschofenig 0:796d0f61a05b 159 while( len-- > 0 )
HannesTschofenig 0:796d0f61a05b 160 {
HannesTschofenig 0:796d0f61a05b 161 *val = ( *val << 8 ) | **p;
HannesTschofenig 0:796d0f61a05b 162 (*p)++;
HannesTschofenig 0:796d0f61a05b 163 }
HannesTschofenig 0:796d0f61a05b 164
HannesTschofenig 0:796d0f61a05b 165 return( 0 );
HannesTschofenig 0:796d0f61a05b 166 }
HannesTschofenig 0:796d0f61a05b 167
HannesTschofenig 0:796d0f61a05b 168 #if defined(POLARSSL_BIGNUM_C)
HannesTschofenig 0:796d0f61a05b 169 int asn1_get_mpi( unsigned char **p,
HannesTschofenig 0:796d0f61a05b 170 const unsigned char *end,
HannesTschofenig 0:796d0f61a05b 171 mpi *X )
HannesTschofenig 0:796d0f61a05b 172 {
HannesTschofenig 0:796d0f61a05b 173 int ret;
HannesTschofenig 0:796d0f61a05b 174 size_t len;
HannesTschofenig 0:796d0f61a05b 175
HannesTschofenig 0:796d0f61a05b 176 if( ( ret = asn1_get_tag( p, end, &len, ASN1_INTEGER ) ) != 0 )
HannesTschofenig 0:796d0f61a05b 177 return( ret );
HannesTschofenig 0:796d0f61a05b 178
HannesTschofenig 0:796d0f61a05b 179 ret = mpi_read_binary( X, *p, len );
HannesTschofenig 0:796d0f61a05b 180
HannesTschofenig 0:796d0f61a05b 181 *p += len;
HannesTschofenig 0:796d0f61a05b 182
HannesTschofenig 0:796d0f61a05b 183 return( ret );
HannesTschofenig 0:796d0f61a05b 184 }
HannesTschofenig 0:796d0f61a05b 185 #endif /* POLARSSL_BIGNUM_C */
HannesTschofenig 0:796d0f61a05b 186
HannesTschofenig 0:796d0f61a05b 187 int asn1_get_bitstring( unsigned char **p, const unsigned char *end,
HannesTschofenig 0:796d0f61a05b 188 asn1_bitstring *bs)
HannesTschofenig 0:796d0f61a05b 189 {
HannesTschofenig 0:796d0f61a05b 190 int ret;
HannesTschofenig 0:796d0f61a05b 191
HannesTschofenig 0:796d0f61a05b 192 /* Certificate type is a single byte bitstring */
HannesTschofenig 0:796d0f61a05b 193 if( ( ret = asn1_get_tag( p, end, &bs->len, ASN1_BIT_STRING ) ) != 0 )
HannesTschofenig 0:796d0f61a05b 194 return( ret );
HannesTschofenig 0:796d0f61a05b 195
HannesTschofenig 0:796d0f61a05b 196 /* Check length, subtract one for actual bit string length */
HannesTschofenig 0:796d0f61a05b 197 if ( bs->len < 1 )
HannesTschofenig 0:796d0f61a05b 198 return( POLARSSL_ERR_ASN1_OUT_OF_DATA );
HannesTschofenig 0:796d0f61a05b 199 bs->len -= 1;
HannesTschofenig 0:796d0f61a05b 200
HannesTschofenig 0:796d0f61a05b 201 /* Get number of unused bits, ensure unused bits <= 7 */
HannesTschofenig 0:796d0f61a05b 202 bs->unused_bits = **p;
HannesTschofenig 0:796d0f61a05b 203 if( bs->unused_bits > 7 )
HannesTschofenig 0:796d0f61a05b 204 return( POLARSSL_ERR_ASN1_INVALID_LENGTH );
HannesTschofenig 0:796d0f61a05b 205 (*p)++;
HannesTschofenig 0:796d0f61a05b 206
HannesTschofenig 0:796d0f61a05b 207 /* Get actual bitstring */
HannesTschofenig 0:796d0f61a05b 208 bs->p = *p;
HannesTschofenig 0:796d0f61a05b 209 *p += bs->len;
HannesTschofenig 0:796d0f61a05b 210
HannesTschofenig 0:796d0f61a05b 211 if( *p != end )
HannesTschofenig 0:796d0f61a05b 212 return( POLARSSL_ERR_ASN1_LENGTH_MISMATCH );
HannesTschofenig 0:796d0f61a05b 213
HannesTschofenig 0:796d0f61a05b 214 return 0;
HannesTschofenig 0:796d0f61a05b 215 }
HannesTschofenig 0:796d0f61a05b 216
HannesTschofenig 0:796d0f61a05b 217 /*
HannesTschofenig 0:796d0f61a05b 218 * Get a bit string without unused bits
HannesTschofenig 0:796d0f61a05b 219 */
HannesTschofenig 0:796d0f61a05b 220 int asn1_get_bitstring_null( unsigned char **p, const unsigned char *end,
HannesTschofenig 0:796d0f61a05b 221 size_t *len )
HannesTschofenig 0:796d0f61a05b 222 {
HannesTschofenig 0:796d0f61a05b 223 int ret;
HannesTschofenig 0:796d0f61a05b 224
HannesTschofenig 0:796d0f61a05b 225 if( ( ret = asn1_get_tag( p, end, len, ASN1_BIT_STRING ) ) != 0 )
HannesTschofenig 0:796d0f61a05b 226 return( ret );
HannesTschofenig 0:796d0f61a05b 227
HannesTschofenig 0:796d0f61a05b 228 if( (*len)-- < 2 || *(*p)++ != 0 )
HannesTschofenig 0:796d0f61a05b 229 return( POLARSSL_ERR_ASN1_INVALID_DATA );
HannesTschofenig 0:796d0f61a05b 230
HannesTschofenig 0:796d0f61a05b 231 return( 0 );
HannesTschofenig 0:796d0f61a05b 232 }
HannesTschofenig 0:796d0f61a05b 233
HannesTschofenig 0:796d0f61a05b 234
HannesTschofenig 0:796d0f61a05b 235
HannesTschofenig 0:796d0f61a05b 236 /*
HannesTschofenig 0:796d0f61a05b 237 * Parses and splits an ASN.1 "SEQUENCE OF <tag>"
HannesTschofenig 0:796d0f61a05b 238 */
HannesTschofenig 0:796d0f61a05b 239 int asn1_get_sequence_of( unsigned char **p,
HannesTschofenig 0:796d0f61a05b 240 const unsigned char *end,
HannesTschofenig 0:796d0f61a05b 241 asn1_sequence *cur,
HannesTschofenig 0:796d0f61a05b 242 int tag)
HannesTschofenig 0:796d0f61a05b 243 {
HannesTschofenig 0:796d0f61a05b 244 int ret;
HannesTschofenig 0:796d0f61a05b 245 size_t len;
HannesTschofenig 0:796d0f61a05b 246 asn1_buf *buf;
HannesTschofenig 0:796d0f61a05b 247
HannesTschofenig 0:796d0f61a05b 248 /* Get main sequence tag */
HannesTschofenig 0:796d0f61a05b 249 if( ( ret = asn1_get_tag( p, end, &len,
HannesTschofenig 0:796d0f61a05b 250 ASN1_CONSTRUCTED | ASN1_SEQUENCE ) ) != 0 )
HannesTschofenig 0:796d0f61a05b 251 return( ret );
HannesTschofenig 0:796d0f61a05b 252
HannesTschofenig 0:796d0f61a05b 253 if( *p + len != end )
HannesTschofenig 0:796d0f61a05b 254 return( POLARSSL_ERR_ASN1_LENGTH_MISMATCH );
HannesTschofenig 0:796d0f61a05b 255
HannesTschofenig 0:796d0f61a05b 256 while( *p < end )
HannesTschofenig 0:796d0f61a05b 257 {
HannesTschofenig 0:796d0f61a05b 258 buf = &(cur->buf);
HannesTschofenig 0:796d0f61a05b 259 buf->tag = **p;
HannesTschofenig 0:796d0f61a05b 260
HannesTschofenig 0:796d0f61a05b 261 if( ( ret = asn1_get_tag( p, end, &buf->len, tag ) ) != 0 )
HannesTschofenig 0:796d0f61a05b 262 return( ret );
HannesTschofenig 0:796d0f61a05b 263
HannesTschofenig 0:796d0f61a05b 264 buf->p = *p;
HannesTschofenig 0:796d0f61a05b 265 *p += buf->len;
HannesTschofenig 0:796d0f61a05b 266
HannesTschofenig 0:796d0f61a05b 267 /* Allocate and assign next pointer */
HannesTschofenig 0:796d0f61a05b 268 if (*p < end)
HannesTschofenig 0:796d0f61a05b 269 {
HannesTschofenig 0:796d0f61a05b 270 cur->next = (asn1_sequence *) polarssl_malloc(
HannesTschofenig 0:796d0f61a05b 271 sizeof( asn1_sequence ) );
HannesTschofenig 0:796d0f61a05b 272
HannesTschofenig 0:796d0f61a05b 273 if( cur->next == NULL )
HannesTschofenig 0:796d0f61a05b 274 return( POLARSSL_ERR_ASN1_MALLOC_FAILED );
HannesTschofenig 0:796d0f61a05b 275
HannesTschofenig 0:796d0f61a05b 276 cur = cur->next;
HannesTschofenig 0:796d0f61a05b 277 }
HannesTschofenig 0:796d0f61a05b 278 }
HannesTschofenig 0:796d0f61a05b 279
HannesTschofenig 0:796d0f61a05b 280 /* Set final sequence entry's next pointer to NULL */
HannesTschofenig 0:796d0f61a05b 281 cur->next = NULL;
HannesTschofenig 0:796d0f61a05b 282
HannesTschofenig 0:796d0f61a05b 283 if( *p != end )
HannesTschofenig 0:796d0f61a05b 284 return( POLARSSL_ERR_ASN1_LENGTH_MISMATCH );
HannesTschofenig 0:796d0f61a05b 285
HannesTschofenig 0:796d0f61a05b 286 return( 0 );
HannesTschofenig 0:796d0f61a05b 287 }
HannesTschofenig 0:796d0f61a05b 288
HannesTschofenig 0:796d0f61a05b 289 int asn1_get_alg( unsigned char **p,
HannesTschofenig 0:796d0f61a05b 290 const unsigned char *end,
HannesTschofenig 0:796d0f61a05b 291 asn1_buf *alg, asn1_buf *params )
HannesTschofenig 0:796d0f61a05b 292 {
HannesTschofenig 0:796d0f61a05b 293 int ret;
HannesTschofenig 0:796d0f61a05b 294 size_t len;
HannesTschofenig 0:796d0f61a05b 295
HannesTschofenig 0:796d0f61a05b 296 if( ( ret = asn1_get_tag( p, end, &len,
HannesTschofenig 0:796d0f61a05b 297 ASN1_CONSTRUCTED | ASN1_SEQUENCE ) ) != 0 )
HannesTschofenig 0:796d0f61a05b 298 return( ret );
HannesTschofenig 0:796d0f61a05b 299
HannesTschofenig 0:796d0f61a05b 300 if( ( end - *p ) < 1 )
HannesTschofenig 0:796d0f61a05b 301 return( POLARSSL_ERR_ASN1_OUT_OF_DATA );
HannesTschofenig 0:796d0f61a05b 302
HannesTschofenig 0:796d0f61a05b 303 alg->tag = **p;
HannesTschofenig 0:796d0f61a05b 304 end = *p + len;
HannesTschofenig 0:796d0f61a05b 305
HannesTschofenig 0:796d0f61a05b 306 if( ( ret = asn1_get_tag( p, end, &alg->len, ASN1_OID ) ) != 0 )
HannesTschofenig 0:796d0f61a05b 307 return( ret );
HannesTschofenig 0:796d0f61a05b 308
HannesTschofenig 0:796d0f61a05b 309 alg->p = *p;
HannesTschofenig 0:796d0f61a05b 310 *p += alg->len;
HannesTschofenig 0:796d0f61a05b 311
HannesTschofenig 0:796d0f61a05b 312 if( *p == end )
HannesTschofenig 0:796d0f61a05b 313 {
HannesTschofenig 0:796d0f61a05b 314 memset( params, 0, sizeof(asn1_buf) );
HannesTschofenig 0:796d0f61a05b 315 return( 0 );
HannesTschofenig 0:796d0f61a05b 316 }
HannesTschofenig 0:796d0f61a05b 317
HannesTschofenig 0:796d0f61a05b 318 params->tag = **p;
HannesTschofenig 0:796d0f61a05b 319 (*p)++;
HannesTschofenig 0:796d0f61a05b 320
HannesTschofenig 0:796d0f61a05b 321 if( ( ret = asn1_get_len( p, end, &params->len ) ) != 0 )
HannesTschofenig 0:796d0f61a05b 322 return( ret );
HannesTschofenig 0:796d0f61a05b 323
HannesTschofenig 0:796d0f61a05b 324 params->p = *p;
HannesTschofenig 0:796d0f61a05b 325 *p += params->len;
HannesTschofenig 0:796d0f61a05b 326
HannesTschofenig 0:796d0f61a05b 327 if( *p != end )
HannesTschofenig 0:796d0f61a05b 328 return( POLARSSL_ERR_ASN1_LENGTH_MISMATCH );
HannesTschofenig 0:796d0f61a05b 329
HannesTschofenig 0:796d0f61a05b 330 return( 0 );
HannesTschofenig 0:796d0f61a05b 331 }
HannesTschofenig 0:796d0f61a05b 332
HannesTschofenig 0:796d0f61a05b 333 int asn1_get_alg_null( unsigned char **p,
HannesTschofenig 0:796d0f61a05b 334 const unsigned char *end,
HannesTschofenig 0:796d0f61a05b 335 asn1_buf *alg )
HannesTschofenig 0:796d0f61a05b 336 {
HannesTschofenig 0:796d0f61a05b 337 int ret;
HannesTschofenig 0:796d0f61a05b 338 asn1_buf params;
HannesTschofenig 0:796d0f61a05b 339
HannesTschofenig 0:796d0f61a05b 340 memset( &params, 0, sizeof(asn1_buf) );
HannesTschofenig 0:796d0f61a05b 341
HannesTschofenig 0:796d0f61a05b 342 if( ( ret = asn1_get_alg( p, end, alg, &params ) ) != 0 )
HannesTschofenig 0:796d0f61a05b 343 return( ret );
HannesTschofenig 0:796d0f61a05b 344
HannesTschofenig 0:796d0f61a05b 345 if( ( params.tag != ASN1_NULL && params.tag != 0 ) || params.len != 0 )
HannesTschofenig 0:796d0f61a05b 346 return( POLARSSL_ERR_ASN1_INVALID_DATA );
HannesTschofenig 0:796d0f61a05b 347
HannesTschofenig 0:796d0f61a05b 348 return( 0 );
HannesTschofenig 0:796d0f61a05b 349 }
HannesTschofenig 0:796d0f61a05b 350
HannesTschofenig 0:796d0f61a05b 351 void asn1_free_named_data( asn1_named_data *cur )
HannesTschofenig 0:796d0f61a05b 352 {
HannesTschofenig 0:796d0f61a05b 353 if( cur == NULL )
HannesTschofenig 0:796d0f61a05b 354 return;
HannesTschofenig 0:796d0f61a05b 355
HannesTschofenig 0:796d0f61a05b 356 polarssl_free( cur->oid.p );
HannesTschofenig 0:796d0f61a05b 357 polarssl_free( cur->val.p );
HannesTschofenig 0:796d0f61a05b 358
HannesTschofenig 0:796d0f61a05b 359 memset( cur, 0, sizeof( asn1_named_data ) );
HannesTschofenig 0:796d0f61a05b 360 }
HannesTschofenig 0:796d0f61a05b 361
HannesTschofenig 0:796d0f61a05b 362 void asn1_free_named_data_list( asn1_named_data **head )
HannesTschofenig 0:796d0f61a05b 363 {
HannesTschofenig 0:796d0f61a05b 364 asn1_named_data *cur;
HannesTschofenig 0:796d0f61a05b 365
HannesTschofenig 0:796d0f61a05b 366 while( ( cur = *head ) != NULL )
HannesTschofenig 0:796d0f61a05b 367 {
HannesTschofenig 0:796d0f61a05b 368 *head = cur->next;
HannesTschofenig 0:796d0f61a05b 369 asn1_free_named_data( cur );
HannesTschofenig 0:796d0f61a05b 370 polarssl_free( cur );
HannesTschofenig 0:796d0f61a05b 371 }
HannesTschofenig 0:796d0f61a05b 372 }
HannesTschofenig 0:796d0f61a05b 373
HannesTschofenig 0:796d0f61a05b 374 asn1_named_data *asn1_find_named_data( asn1_named_data *list,
HannesTschofenig 0:796d0f61a05b 375 const char *oid, size_t len )
HannesTschofenig 0:796d0f61a05b 376 {
HannesTschofenig 0:796d0f61a05b 377 while( list != NULL )
HannesTschofenig 0:796d0f61a05b 378 {
HannesTschofenig 0:796d0f61a05b 379 if( list->oid.len == len &&
HannesTschofenig 0:796d0f61a05b 380 memcmp( list->oid.p, oid, len ) == 0 )
HannesTschofenig 0:796d0f61a05b 381 {
HannesTschofenig 0:796d0f61a05b 382 break;
HannesTschofenig 0:796d0f61a05b 383 }
HannesTschofenig 0:796d0f61a05b 384
HannesTschofenig 0:796d0f61a05b 385 list = list->next;
HannesTschofenig 0:796d0f61a05b 386 }
HannesTschofenig 0:796d0f61a05b 387
HannesTschofenig 0:796d0f61a05b 388 return( list );
HannesTschofenig 0:796d0f61a05b 389 }
HannesTschofenig 0:796d0f61a05b 390
HannesTschofenig 0:796d0f61a05b 391 #endif /* POLARSSL_ASN1_PARSE_C */
HannesTschofenig 0:796d0f61a05b 392
HannesTschofenig 0:796d0f61a05b 393