1 /* asn_pack.c */ 2 /* Written by Dr Stephen N Henson (shenson@bigfoot.com) 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 *ASN1_seq_unpack(const unsigned char *buf, int len, 70 d2i_of_void *d2i,void (*free_func)(void *)) 71 { 72 STACK *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 *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 } 192