155714Skris/* asn_pack.c */ 2280304Sjkim/* 3280304Sjkim * Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL project 4280304Sjkim * 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 14280304Sjkim * 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, 71280304Sjkim d2i_of_void *d2i, 72280304Sjkim void (*free_func) (OPENSSL_BLOCK)) 7355714Skris{ 74238405Sjkim STACK_OF(OPENSSL_BLOCK) *sk; 75160814Ssimon const unsigned char *pbuf; 76280304Sjkim pbuf = buf; 7755714Skris if (!(sk = d2i_ASN1_SET(NULL, &pbuf, len, d2i, free_func, 78280304Sjkim V_ASN1_SEQUENCE, V_ASN1_UNIVERSAL))) 79280304Sjkim ASN1err(ASN1_F_ASN1_SEQ_UNPACK, ASN1_R_DECODE_ERROR); 8055714Skris return sk; 8155714Skris} 8255714Skris 83280304Sjkim/* 84280304Sjkim * 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, 89280304Sjkim unsigned char **buf, int *len) 9055714Skris{ 91280304Sjkim int safelen; 92280304Sjkim unsigned char *safe, *p; 93280304Sjkim if (!(safelen = i2d_ASN1_SET(safes, NULL, i2d, V_ASN1_SEQUENCE, 94280304Sjkim V_ASN1_UNIVERSAL, IS_SEQUENCE))) { 95280304Sjkim ASN1err(ASN1_F_ASN1_SEQ_PACK, ASN1_R_ENCODE_ERROR); 96280304Sjkim return NULL; 97280304Sjkim } 98280304Sjkim if (!(safe = OPENSSL_malloc(safelen))) { 99280304Sjkim ASN1err(ASN1_F_ASN1_SEQ_PACK, ERR_R_MALLOC_FAILURE); 100280304Sjkim return NULL; 101280304Sjkim } 102280304Sjkim p = safe; 103280304Sjkim i2d_ASN1_SET(safes, &p, i2d, V_ASN1_SEQUENCE, V_ASN1_UNIVERSAL, 104280304Sjkim IS_SEQUENCE); 105280304Sjkim if (len) 106280304Sjkim *len = safelen; 107280304Sjkim if (buf) 108280304Sjkim *buf = safe; 109280304Sjkim 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{ 116280304Sjkim const unsigned char *p; 117280304Sjkim char *ret; 11855714Skris 119280304Sjkim p = oct->data; 120280304Sjkim if (!(ret = d2i(NULL, &p, oct->length))) 121280304Sjkim ASN1err(ASN1_F_ASN1_UNPACK_STRING, ASN1_R_DECODE_ERROR); 122280304Sjkim 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{ 129280304Sjkim unsigned char *p; 130280304Sjkim ASN1_STRING *octmp; 13155714Skris 132280304Sjkim if (!oct || !*oct) { 133280304Sjkim if (!(octmp = ASN1_STRING_new())) { 134280304Sjkim ASN1err(ASN1_F_ASN1_PACK_STRING, ERR_R_MALLOC_FAILURE); 135280304Sjkim return NULL; 136280304Sjkim } 137280304Sjkim if (oct) 138280304Sjkim *oct = octmp; 139280304Sjkim } else 140280304Sjkim octmp = *oct; 141280304Sjkim 142280304Sjkim if (!(octmp->length = i2d(obj, NULL))) { 143280304Sjkim ASN1err(ASN1_F_ASN1_PACK_STRING, ASN1_R_ENCODE_ERROR); 144280304Sjkim goto err; 145280304Sjkim } 146280304Sjkim if (!(p = OPENSSL_malloc(octmp->length))) { 147280304Sjkim ASN1err(ASN1_F_ASN1_PACK_STRING, ERR_R_MALLOC_FAILURE); 148280304Sjkim goto err; 149280304Sjkim } 150280304Sjkim octmp->data = p; 151280304Sjkim i2d(obj, &p); 152280304Sjkim return octmp; 153280304Sjkim err: 154280304Sjkim if (!oct || !*oct) { 155280304Sjkim ASN1_STRING_free(octmp); 156280304Sjkim if (oct) 157280304Sjkim *oct = NULL; 158280304Sjkim } 159280304Sjkim 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{ 168280304Sjkim ASN1_STRING *octmp; 169109998Smarkm 170280304Sjkim if (!oct || !*oct) { 171280304Sjkim if (!(octmp = ASN1_STRING_new())) { 172280304Sjkim ASN1err(ASN1_F_ASN1_ITEM_PACK, ERR_R_MALLOC_FAILURE); 173280304Sjkim return NULL; 174280304Sjkim } 175280304Sjkim if (oct) 176280304Sjkim *oct = octmp; 177280304Sjkim } else 178280304Sjkim octmp = *oct; 179109998Smarkm 180280304Sjkim if (octmp->data) { 181280304Sjkim OPENSSL_free(octmp->data); 182280304Sjkim octmp->data = NULL; 183280304Sjkim } 184280304Sjkim 185280304Sjkim if (!(octmp->length = ASN1_item_i2d(obj, &octmp->data, it))) { 186280304Sjkim ASN1err(ASN1_F_ASN1_ITEM_PACK, ASN1_R_ENCODE_ERROR); 187280304Sjkim return NULL; 188280304Sjkim } 189280304Sjkim if (!octmp->data) { 190280304Sjkim ASN1err(ASN1_F_ASN1_ITEM_PACK, ERR_R_MALLOC_FAILURE); 191280304Sjkim return NULL; 192280304Sjkim } 193280304Sjkim 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{ 200280304Sjkim const unsigned char *p; 201280304Sjkim void *ret; 202109998Smarkm 203280304Sjkim p = oct->data; 204280304Sjkim if (!(ret = ASN1_item_d2i(NULL, &p, oct->length, it))) 205280304Sjkim ASN1err(ASN1_F_ASN1_ITEM_UNPACK, ASN1_R_DECODE_ERROR); 206280304Sjkim return ret; 207109998Smarkm} 208