155714Skris/* asn_pack.c */ 2280297Sjkim/* 3280297Sjkim * Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL project 4280297Sjkim * 1999. 555714Skris */ 655714Skris/* ==================================================================== 755714Skris * Copyright (c) 1999 The OpenSSL Project. All rights reserved. 855714Skris * 955714Skris * Redistribution and use in source and binary forms, with or without 1055714Skris * modification, are permitted provided that the following conditions 1155714Skris * are met: 1255714Skris * 1355714Skris * 1. Redistributions of source code must retain the above copyright 14280297Sjkim * notice, this list of conditions and the following disclaimer. 1555714Skris * 1655714Skris * 2. Redistributions in binary form must reproduce the above copyright 1755714Skris * notice, this list of conditions and the following disclaimer in 1855714Skris * the documentation and/or other materials provided with the 1955714Skris * distribution. 2055714Skris * 2155714Skris * 3. All advertising materials mentioning features or use of this 2255714Skris * software must display the following acknowledgment: 2355714Skris * "This product includes software developed by the OpenSSL Project 2455714Skris * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)" 2555714Skris * 2655714Skris * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to 2755714Skris * endorse or promote products derived from this software without 2855714Skris * prior written permission. For written permission, please contact 2955714Skris * licensing@OpenSSL.org. 3055714Skris * 3155714Skris * 5. Products derived from this software may not be called "OpenSSL" 3255714Skris * nor may "OpenSSL" appear in their names without prior written 3355714Skris * permission of the OpenSSL Project. 3455714Skris * 3555714Skris * 6. Redistributions of any form whatsoever must retain the following 3655714Skris * acknowledgment: 3755714Skris * "This product includes software developed by the OpenSSL Project 3855714Skris * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)" 3955714Skris * 4055714Skris * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY 4155714Skris * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 4255714Skris * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 4355714Skris * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR 4455714Skris * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 4555714Skris * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 4655714Skris * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 4755714Skris * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 4855714Skris * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 4955714Skris * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 5055714Skris * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED 5155714Skris * OF THE POSSIBILITY OF SUCH DAMAGE. 5255714Skris * ==================================================================== 5355714Skris * 5455714Skris * This product includes cryptographic software written by Eric Young 5555714Skris * (eay@cryptsoft.com). This product includes software written by Tim 5655714Skris * Hudson (tjh@cryptsoft.com). 5755714Skris * 5855714Skris */ 5955714Skris 6055714Skris#include <stdio.h> 6155714Skris#include "cryptlib.h" 6255714Skris#include <openssl/asn1.h> 6355714Skris 64109998Smarkm#ifndef NO_ASN1_OLD 65109998Smarkm 6655714Skris/* ASN1 packing and unpacking functions */ 6755714Skris 6855714Skris/* Turn an ASN1 encoded SEQUENCE OF into a STACK of structures */ 6955714Skris 70238405SjkimSTACK_OF(OPENSSL_BLOCK) *ASN1_seq_unpack(const unsigned char *buf, int len, 71280297Sjkim d2i_of_void *d2i, 72280297Sjkim void (*free_func) (OPENSSL_BLOCK)) 7355714Skris{ 74238405Sjkim STACK_OF(OPENSSL_BLOCK) *sk; 75160814Ssimon const unsigned char *pbuf; 76280297Sjkim pbuf = buf; 7755714Skris if (!(sk = d2i_ASN1_SET(NULL, &pbuf, len, d2i, free_func, 78280297Sjkim V_ASN1_SEQUENCE, V_ASN1_UNIVERSAL))) 79280297Sjkim ASN1err(ASN1_F_ASN1_SEQ_UNPACK, ASN1_R_DECODE_ERROR); 8055714Skris return sk; 8155714Skris} 8255714Skris 83280297Sjkim/* 84280297Sjkim * Turn a STACK structures into an ASN1 encoded SEQUENCE OF structure in a 8568651Skris * OPENSSL_malloc'ed buffer 8655714Skris */ 8755714Skris 88238405Sjkimunsigned char *ASN1_seq_pack(STACK_OF(OPENSSL_BLOCK) *safes, i2d_of_void *i2d, 89280297Sjkim unsigned char **buf, int *len) 9055714Skris{ 91280297Sjkim int safelen; 92280297Sjkim unsigned char *safe, *p; 93280297Sjkim if (!(safelen = i2d_ASN1_SET(safes, NULL, i2d, V_ASN1_SEQUENCE, 94280297Sjkim V_ASN1_UNIVERSAL, IS_SEQUENCE))) { 95280297Sjkim ASN1err(ASN1_F_ASN1_SEQ_PACK, ASN1_R_ENCODE_ERROR); 96280297Sjkim return NULL; 97280297Sjkim } 98280297Sjkim if (!(safe = OPENSSL_malloc(safelen))) { 99280297Sjkim ASN1err(ASN1_F_ASN1_SEQ_PACK, ERR_R_MALLOC_FAILURE); 100280297Sjkim return NULL; 101280297Sjkim } 102280297Sjkim p = safe; 103280297Sjkim i2d_ASN1_SET(safes, &p, i2d, V_ASN1_SEQUENCE, V_ASN1_UNIVERSAL, 104280297Sjkim IS_SEQUENCE); 105280297Sjkim if (len) 106280297Sjkim *len = safelen; 107280297Sjkim if (buf) 108280297Sjkim *buf = safe; 109280297Sjkim return safe; 11055714Skris} 11155714Skris 11255714Skris/* Extract an ASN1 object from an ASN1_STRING */ 11355714Skris 114160814Ssimonvoid *ASN1_unpack_string(ASN1_STRING *oct, d2i_of_void *d2i) 11555714Skris{ 116280297Sjkim const unsigned char *p; 117280297Sjkim char *ret; 11855714Skris 119280297Sjkim p = oct->data; 120280297Sjkim if (!(ret = d2i(NULL, &p, oct->length))) 121280297Sjkim ASN1err(ASN1_F_ASN1_UNPACK_STRING, ASN1_R_DECODE_ERROR); 122280297Sjkim return ret; 12355714Skris} 12455714Skris 12555714Skris/* Pack an ASN1 object into an ASN1_STRING */ 12655714Skris 127160814SsimonASN1_STRING *ASN1_pack_string(void *obj, i2d_of_void *i2d, ASN1_STRING **oct) 12855714Skris{ 129280297Sjkim unsigned char *p; 130280297Sjkim ASN1_STRING *octmp; 13155714Skris 132280297Sjkim if (!oct || !*oct) { 133280297Sjkim if (!(octmp = ASN1_STRING_new())) { 134280297Sjkim ASN1err(ASN1_F_ASN1_PACK_STRING, ERR_R_MALLOC_FAILURE); 135280297Sjkim return NULL; 136280297Sjkim } 137280297Sjkim if (oct) 138280297Sjkim *oct = octmp; 139280297Sjkim } else 140280297Sjkim octmp = *oct; 141280297Sjkim 142280297Sjkim if (!(octmp->length = i2d(obj, NULL))) { 143280297Sjkim ASN1err(ASN1_F_ASN1_PACK_STRING, ASN1_R_ENCODE_ERROR); 144280297Sjkim goto err; 145280297Sjkim } 146280297Sjkim if (!(p = OPENSSL_malloc(octmp->length))) { 147280297Sjkim ASN1err(ASN1_F_ASN1_PACK_STRING, ERR_R_MALLOC_FAILURE); 148280297Sjkim goto err; 149280297Sjkim } 150280297Sjkim octmp->data = p; 151280297Sjkim i2d(obj, &p); 152280297Sjkim return octmp; 153280297Sjkim err: 154280297Sjkim if (!oct || !*oct) { 155280297Sjkim ASN1_STRING_free(octmp); 156280297Sjkim if (oct) 157280297Sjkim *oct = NULL; 158280297Sjkim } 159280297Sjkim return NULL; 16055714Skris} 16155714Skris 162109998Smarkm#endif 163109998Smarkm 164109998Smarkm/* ASN1_ITEM versions of the above */ 165109998Smarkm 166109998SmarkmASN1_STRING *ASN1_item_pack(void *obj, const ASN1_ITEM *it, ASN1_STRING **oct) 167109998Smarkm{ 168280297Sjkim ASN1_STRING *octmp; 169109998Smarkm 170280297Sjkim if (!oct || !*oct) { 171280297Sjkim if (!(octmp = ASN1_STRING_new())) { 172280297Sjkim ASN1err(ASN1_F_ASN1_ITEM_PACK, ERR_R_MALLOC_FAILURE); 173280297Sjkim return NULL; 174280297Sjkim } 175280297Sjkim if (oct) 176280297Sjkim *oct = octmp; 177280297Sjkim } else 178280297Sjkim octmp = *oct; 179109998Smarkm 180280297Sjkim if (octmp->data) { 181280297Sjkim OPENSSL_free(octmp->data); 182280297Sjkim octmp->data = NULL; 183280297Sjkim } 184280297Sjkim 185280297Sjkim if (!(octmp->length = ASN1_item_i2d(obj, &octmp->data, it))) { 186280297Sjkim ASN1err(ASN1_F_ASN1_ITEM_PACK, ASN1_R_ENCODE_ERROR); 187280297Sjkim return NULL; 188280297Sjkim } 189280297Sjkim if (!octmp->data) { 190280297Sjkim ASN1err(ASN1_F_ASN1_ITEM_PACK, ERR_R_MALLOC_FAILURE); 191280297Sjkim return NULL; 192280297Sjkim } 193280297Sjkim return octmp; 194109998Smarkm} 195109998Smarkm 196109998Smarkm/* Extract an ASN1 object from an ASN1_STRING */ 197109998Smarkm 198109998Smarkmvoid *ASN1_item_unpack(ASN1_STRING *oct, const ASN1_ITEM *it) 199109998Smarkm{ 200280297Sjkim const unsigned char *p; 201280297Sjkim void *ret; 202109998Smarkm 203280297Sjkim p = oct->data; 204280297Sjkim if (!(ret = ASN1_item_d2i(NULL, &p, oct->length, it))) 205280297Sjkim ASN1err(ASN1_F_ASN1_ITEM_UNPACK, ASN1_R_DECODE_ERROR); 206280297Sjkim return ret; 207109998Smarkm} 208