asn_pack.c revision 256281
1169691Skan/* asn_pack.c */ 2169691Skan/* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL 3169691Skan * project 1999. 4169691Skan */ 5169691Skan/* ==================================================================== 6169691Skan * Copyright (c) 1999 The OpenSSL Project. All rights reserved. 7169691Skan * 8169691Skan * Redistribution and use in source and binary forms, with or without 9169691Skan * modification, are permitted provided that the following conditions 10169691Skan * are met: 11169691Skan * 12169691Skan * 1. Redistributions of source code must retain the above copyright 13169691Skan * notice, this list of conditions and the following disclaimer. 14169691Skan * 15169691Skan * 2. Redistributions in binary form must reproduce the above copyright 16169691Skan * notice, this list of conditions and the following disclaimer in 17169691Skan * the documentation and/or other materials provided with the 18169691Skan * distribution. 19169691Skan * 20169691Skan * 3. All advertising materials mentioning features or use of this 21169691Skan * software must display the following acknowledgment: 22169691Skan * "This product includes software developed by the OpenSSL Project 23169691Skan * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)" 24169691Skan * 25169691Skan * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to 26169691Skan * endorse or promote products derived from this software without 27169691Skan * prior written permission. For written permission, please contact 28169691Skan * licensing@OpenSSL.org. 29169691Skan * 30169691Skan * 5. Products derived from this software may not be called "OpenSSL" 31169691Skan * nor may "OpenSSL" appear in their names without prior written 32169691Skan * permission of the OpenSSL Project. 33169691Skan * 34169691Skan * 6. Redistributions of any form whatsoever must retain the following 35169691Skan * acknowledgment: 36169691Skan * "This product includes software developed by the OpenSSL Project 37169691Skan * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)" 38169691Skan * 39169691Skan * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY 40169691Skan * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 41169691Skan * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 42169691Skan * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR 43169691Skan * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 44169691Skan * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 45169691Skan * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 46169691Skan * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 47169691Skan * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 48169691Skan * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 49169691Skan * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED 50169691Skan * OF THE POSSIBILITY OF SUCH DAMAGE. 51169691Skan * ==================================================================== 52169691Skan * 53169691Skan * This product includes cryptographic software written by Eric Young 54169691Skan * (eay@cryptsoft.com). This product includes software written by Tim 55169691Skan * Hudson (tjh@cryptsoft.com). 56169691Skan * 57169691Skan */ 58169691Skan 59169691Skan#include <stdio.h> 60169691Skan#include "cryptlib.h" 61169691Skan#include <openssl/asn1.h> 62169691Skan 63169691Skan#ifndef NO_ASN1_OLD 64169691Skan 65169691Skan/* ASN1 packing and unpacking functions */ 66169691Skan 67169691Skan/* Turn an ASN1 encoded SEQUENCE OF into a STACK of structures */ 68169691Skan 69169691SkanSTACK_OF(OPENSSL_BLOCK) *ASN1_seq_unpack(const unsigned char *buf, int len, 70169691Skan d2i_of_void *d2i, void (*free_func)(OPENSSL_BLOCK)) 71169691Skan{ 72169691Skan STACK_OF(OPENSSL_BLOCK) *sk; 73169691Skan const unsigned char *pbuf; 74169691Skan pbuf = buf; 75169691Skan if (!(sk = d2i_ASN1_SET(NULL, &pbuf, len, d2i, free_func, 76169691Skan V_ASN1_SEQUENCE, V_ASN1_UNIVERSAL))) 77169691Skan ASN1err(ASN1_F_ASN1_SEQ_UNPACK,ASN1_R_DECODE_ERROR); 78169691Skan return sk; 79169691Skan} 80169691Skan 81169691Skan/* Turn a STACK structures into an ASN1 encoded SEQUENCE OF structure in a 82169691Skan * OPENSSL_malloc'ed buffer 83169691Skan */ 84169691Skan 85169691Skanunsigned char *ASN1_seq_pack(STACK_OF(OPENSSL_BLOCK) *safes, i2d_of_void *i2d, 86169691Skan unsigned char **buf, int *len) 87169691Skan{ 88169691Skan int safelen; 89169691Skan unsigned char *safe, *p; 90169691Skan if (!(safelen = i2d_ASN1_SET(safes, NULL, i2d, V_ASN1_SEQUENCE, 91169691Skan V_ASN1_UNIVERSAL, IS_SEQUENCE))) { 92169691Skan ASN1err(ASN1_F_ASN1_SEQ_PACK,ASN1_R_ENCODE_ERROR); 93169691Skan return NULL; 94169691Skan } 95169691Skan if (!(safe = OPENSSL_malloc (safelen))) { 96169691Skan ASN1err(ASN1_F_ASN1_SEQ_PACK,ERR_R_MALLOC_FAILURE); 97169691Skan return NULL; 98169691Skan } 99169691Skan p = safe; 100169691Skan i2d_ASN1_SET(safes, &p, i2d, V_ASN1_SEQUENCE, V_ASN1_UNIVERSAL, 101169691Skan IS_SEQUENCE); 102169691Skan if (len) *len = safelen; 103169691Skan if (buf) *buf = safe; 104169691Skan return safe; 105169691Skan} 106169691Skan 107169691Skan/* Extract an ASN1 object from an ASN1_STRING */ 108169691Skan 109169691Skanvoid *ASN1_unpack_string(ASN1_STRING *oct, d2i_of_void *d2i) 110169691Skan{ 111169691Skan const unsigned char *p; 112169691Skan char *ret; 113169691Skan 114169691Skan p = oct->data; 115169691Skan if(!(ret = d2i(NULL, &p, oct->length))) 116169691Skan ASN1err(ASN1_F_ASN1_UNPACK_STRING,ASN1_R_DECODE_ERROR); 117169691Skan return ret; 118169691Skan} 119169691Skan 120169691Skan/* Pack an ASN1 object into an ASN1_STRING */ 121169691Skan 122169691SkanASN1_STRING *ASN1_pack_string(void *obj, i2d_of_void *i2d, ASN1_STRING **oct) 123169691Skan{ 124169691Skan unsigned char *p; 125169691Skan ASN1_STRING *octmp; 126169691Skan 127169691Skan if (!oct || !*oct) { 128169691Skan if (!(octmp = ASN1_STRING_new ())) { 129169691Skan ASN1err(ASN1_F_ASN1_PACK_STRING,ERR_R_MALLOC_FAILURE); 130169691Skan return NULL; 131169691Skan } 132169691Skan if (oct) *oct = octmp; 133169691Skan } else octmp = *oct; 134169691Skan 135169691Skan if (!(octmp->length = i2d(obj, NULL))) { 136169691Skan ASN1err(ASN1_F_ASN1_PACK_STRING,ASN1_R_ENCODE_ERROR); 137169691Skan return NULL; 138169691Skan } 139169691Skan if (!(p = OPENSSL_malloc (octmp->length))) { 140169691Skan ASN1err(ASN1_F_ASN1_PACK_STRING,ERR_R_MALLOC_FAILURE); 141169691Skan return NULL; 142169691Skan } 143169691Skan octmp->data = p; 144169691Skan i2d (obj, &p); 145169691Skan return octmp; 146169691Skan} 147169691Skan 148169691Skan#endif 149169691Skan 150169691Skan/* ASN1_ITEM versions of the above */ 151169691Skan 152169691SkanASN1_STRING *ASN1_item_pack(void *obj, const ASN1_ITEM *it, ASN1_STRING **oct) 153169691Skan{ 154169691Skan ASN1_STRING *octmp; 155169691Skan 156169691Skan if (!oct || !*oct) { 157169691Skan if (!(octmp = ASN1_STRING_new ())) { 158169691Skan ASN1err(ASN1_F_ASN1_ITEM_PACK,ERR_R_MALLOC_FAILURE); 159169691Skan return NULL; 160169691Skan } 161169691Skan if (oct) *oct = octmp; 162169691Skan } else octmp = *oct; 163169691Skan 164169691Skan if(octmp->data) { 165169691Skan OPENSSL_free(octmp->data); 166169691Skan octmp->data = NULL; 167169691Skan } 168169691Skan 169169691Skan if (!(octmp->length = ASN1_item_i2d(obj, &octmp->data, it))) { 170169691Skan ASN1err(ASN1_F_ASN1_ITEM_PACK,ASN1_R_ENCODE_ERROR); 171169691Skan return NULL; 172169691Skan } 173169691Skan if (!octmp->data) { 174169691Skan ASN1err(ASN1_F_ASN1_ITEM_PACK,ERR_R_MALLOC_FAILURE); 175169691Skan return NULL; 176169691Skan } 177169691Skan return octmp; 178169691Skan} 179169691Skan 180169691Skan/* Extract an ASN1 object from an ASN1_STRING */ 181169691Skan 182169691Skanvoid *ASN1_item_unpack(ASN1_STRING *oct, const ASN1_ITEM *it) 183169691Skan{ 184169691Skan const unsigned char *p; 185169691Skan void *ret; 186169691Skan 187169691Skan p = oct->data; 188169691Skan if(!(ret = ASN1_item_d2i(NULL, &p, oct->length, it))) 189169691Skan ASN1err(ASN1_F_ASN1_ITEM_UNPACK,ASN1_R_DECODE_ERROR); 190169691Skan return ret; 191169691Skan} 192169691Skan