Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 1 | /* asn_pack.c */ |
| 2 | /* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL |
| 3 | * project 1999. |
| 4 | */ |
| 5 | /* ==================================================================== |
| 6 | * Copyright (c) 1999 The OpenSSL Project. All rights reserved. |
| 7 | * |
| 8 | * Redistribution and use in source and binary forms, with or without |
| 9 | * modification, are permitted provided that the following conditions |
| 10 | * are met: |
| 11 | * |
| 12 | * 1. Redistributions of source code must retain the above copyright |
| 13 | * notice, this list of conditions and the following disclaimer. |
| 14 | * |
| 15 | * 2. Redistributions in binary form must reproduce the above copyright |
| 16 | * notice, this list of conditions and the following disclaimer in |
| 17 | * the documentation and/or other materials provided with the |
| 18 | * distribution. |
| 19 | * |
| 20 | * 3. All advertising materials mentioning features or use of this |
| 21 | * software must display the following acknowledgment: |
| 22 | * "This product includes software developed by the OpenSSL Project |
| 23 | * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)" |
| 24 | * |
| 25 | * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to |
| 26 | * endorse or promote products derived from this software without |
| 27 | * prior written permission. For written permission, please contact |
| 28 | * licensing@OpenSSL.org. |
| 29 | * |
| 30 | * 5. Products derived from this software may not be called "OpenSSL" |
| 31 | * nor may "OpenSSL" appear in their names without prior written |
| 32 | * permission of the OpenSSL Project. |
| 33 | * |
| 34 | * 6. Redistributions of any form whatsoever must retain the following |
| 35 | * acknowledgment: |
| 36 | * "This product includes software developed by the OpenSSL Project |
| 37 | * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)" |
| 38 | * |
| 39 | * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY |
| 40 | * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 41 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| 42 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR |
| 43 | * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| 44 | * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
| 45 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
| 46 | * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 47 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, |
| 48 | * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| 49 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED |
| 50 | * OF THE POSSIBILITY OF SUCH DAMAGE. |
| 51 | * ==================================================================== |
| 52 | * |
| 53 | * This product includes cryptographic software written by Eric Young |
| 54 | * (eay@cryptsoft.com). This product includes software written by Tim |
| 55 | * Hudson (tjh@cryptsoft.com). |
| 56 | * |
| 57 | */ |
| 58 | |
| 59 | #include <stdio.h> |
| 60 | #include "cryptlib.h" |
| 61 | #include <openssl/asn1.h> |
| 62 | |
| 63 | #ifndef NO_ASN1_OLD |
| 64 | |
| 65 | /* ASN1 packing and unpacking functions */ |
| 66 | |
| 67 | /* Turn an ASN1 encoded SEQUENCE OF into a STACK of structures */ |
| 68 | |
| 69 | STACK_OF(OPENSSL_BLOCK) *ASN1_seq_unpack(const unsigned char *buf, int len, |
| 70 | d2i_of_void *d2i, void (*free_func)(OPENSSL_BLOCK)) |
| 71 | { |
| 72 | STACK_OF(OPENSSL_BLOCK) *sk; |
| 73 | const unsigned char *pbuf; |
| 74 | pbuf = buf; |
| 75 | if (!(sk = d2i_ASN1_SET(NULL, &pbuf, len, d2i, free_func, |
| 76 | V_ASN1_SEQUENCE, V_ASN1_UNIVERSAL))) |
| 77 | ASN1err(ASN1_F_ASN1_SEQ_UNPACK,ASN1_R_DECODE_ERROR); |
| 78 | return sk; |
| 79 | } |
| 80 | |
| 81 | /* Turn a STACK structures into an ASN1 encoded SEQUENCE OF structure in a |
| 82 | * OPENSSL_malloc'ed buffer |
| 83 | */ |
| 84 | |
| 85 | unsigned char *ASN1_seq_pack(STACK_OF(OPENSSL_BLOCK) *safes, i2d_of_void *i2d, |
| 86 | unsigned char **buf, int *len) |
| 87 | { |
| 88 | int safelen; |
| 89 | unsigned char *safe, *p; |
| 90 | if (!(safelen = i2d_ASN1_SET(safes, NULL, i2d, V_ASN1_SEQUENCE, |
| 91 | V_ASN1_UNIVERSAL, IS_SEQUENCE))) { |
| 92 | ASN1err(ASN1_F_ASN1_SEQ_PACK,ASN1_R_ENCODE_ERROR); |
| 93 | return NULL; |
| 94 | } |
| 95 | if (!(safe = OPENSSL_malloc (safelen))) { |
| 96 | ASN1err(ASN1_F_ASN1_SEQ_PACK,ERR_R_MALLOC_FAILURE); |
| 97 | return NULL; |
| 98 | } |
| 99 | p = safe; |
| 100 | i2d_ASN1_SET(safes, &p, i2d, V_ASN1_SEQUENCE, V_ASN1_UNIVERSAL, |
| 101 | IS_SEQUENCE); |
| 102 | if (len) *len = safelen; |
| 103 | if (buf) *buf = safe; |
| 104 | return safe; |
| 105 | } |
| 106 | |
| 107 | /* Extract an ASN1 object from an ASN1_STRING */ |
| 108 | |
| 109 | void *ASN1_unpack_string(ASN1_STRING *oct, d2i_of_void *d2i) |
| 110 | { |
| 111 | const unsigned char *p; |
| 112 | char *ret; |
| 113 | |
| 114 | p = oct->data; |
| 115 | if(!(ret = d2i(NULL, &p, oct->length))) |
| 116 | ASN1err(ASN1_F_ASN1_UNPACK_STRING,ASN1_R_DECODE_ERROR); |
| 117 | return ret; |
| 118 | } |
| 119 | |
| 120 | /* Pack an ASN1 object into an ASN1_STRING */ |
| 121 | |
| 122 | ASN1_STRING *ASN1_pack_string(void *obj, i2d_of_void *i2d, ASN1_STRING **oct) |
| 123 | { |
| 124 | unsigned char *p; |
| 125 | ASN1_STRING *octmp; |
| 126 | |
| 127 | if (!oct || !*oct) { |
| 128 | if (!(octmp = ASN1_STRING_new ())) { |
| 129 | ASN1err(ASN1_F_ASN1_PACK_STRING,ERR_R_MALLOC_FAILURE); |
| 130 | return NULL; |
| 131 | } |
| 132 | if (oct) *oct = octmp; |
| 133 | } else octmp = *oct; |
| 134 | |
| 135 | if (!(octmp->length = i2d(obj, NULL))) { |
| 136 | ASN1err(ASN1_F_ASN1_PACK_STRING,ASN1_R_ENCODE_ERROR); |
| 137 | return NULL; |
| 138 | } |
| 139 | if (!(p = OPENSSL_malloc (octmp->length))) { |
| 140 | ASN1err(ASN1_F_ASN1_PACK_STRING,ERR_R_MALLOC_FAILURE); |
| 141 | return NULL; |
| 142 | } |
| 143 | octmp->data = p; |
| 144 | i2d (obj, &p); |
| 145 | return octmp; |
| 146 | } |
| 147 | |
| 148 | #endif |
| 149 | |
| 150 | /* ASN1_ITEM versions of the above */ |
| 151 | |
| 152 | ASN1_STRING *ASN1_item_pack(void *obj, const ASN1_ITEM *it, ASN1_STRING **oct) |
| 153 | { |
| 154 | ASN1_STRING *octmp; |
| 155 | |
| 156 | if (!oct || !*oct) { |
| 157 | if (!(octmp = ASN1_STRING_new ())) { |
| 158 | ASN1err(ASN1_F_ASN1_ITEM_PACK,ERR_R_MALLOC_FAILURE); |
| 159 | return NULL; |
| 160 | } |
| 161 | if (oct) *oct = octmp; |
| 162 | } else octmp = *oct; |
| 163 | |
| 164 | if(octmp->data) { |
| 165 | OPENSSL_free(octmp->data); |
| 166 | octmp->data = NULL; |
| 167 | } |
| 168 | |
| 169 | if (!(octmp->length = ASN1_item_i2d(obj, &octmp->data, it))) { |
| 170 | ASN1err(ASN1_F_ASN1_ITEM_PACK,ASN1_R_ENCODE_ERROR); |
| 171 | return NULL; |
| 172 | } |
| 173 | if (!octmp->data) { |
| 174 | ASN1err(ASN1_F_ASN1_ITEM_PACK,ERR_R_MALLOC_FAILURE); |
| 175 | return NULL; |
| 176 | } |
| 177 | return octmp; |
| 178 | } |
| 179 | |
| 180 | /* Extract an ASN1 object from an ASN1_STRING */ |
| 181 | |
| 182 | void *ASN1_item_unpack(ASN1_STRING *oct, const ASN1_ITEM *it) |
| 183 | { |
| 184 | const unsigned char *p; |
| 185 | void *ret; |
| 186 | |
| 187 | p = oct->data; |
| 188 | if(!(ret = ASN1_item_d2i(NULL, &p, oct->length, it))) |
| 189 | ASN1err(ASN1_F_ASN1_ITEM_UNPACK,ASN1_R_DECODE_ERROR); |
| 190 | return ret; |
| 191 | } |