145 lines
4.7 KiB
C
145 lines
4.7 KiB
C
/* asn_pack.c */
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/* Written by Dr Stephen N Henson (shenson@bigfoot.com) for the OpenSSL
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* project 1999.
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*/
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/* ====================================================================
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* Copyright (c) 1999 The OpenSSL Project. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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*
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* 3. All advertising materials mentioning features or use of this
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* software must display the following acknowledgment:
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* "This product includes software developed by the OpenSSL Project
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* for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
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*
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* 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
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* endorse or promote products derived from this software without
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* prior written permission. For written permission, please contact
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* licensing@OpenSSL.org.
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*
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* 5. Products derived from this software may not be called "OpenSSL"
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* nor may "OpenSSL" appear in their names without prior written
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* permission of the OpenSSL Project.
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*
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* 6. Redistributions of any form whatsoever must retain the following
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* acknowledgment:
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* "This product includes software developed by the OpenSSL Project
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* for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
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*
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* THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
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* EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
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* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
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* OF THE POSSIBILITY OF SUCH DAMAGE.
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* ====================================================================
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*
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* This product includes cryptographic software written by Eric Young
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* (eay@cryptsoft.com). This product includes software written by Tim
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* Hudson (tjh@cryptsoft.com).
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*
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*/
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#include <stdio.h>
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#include "cryptlib.h"
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#include <openssl/asn1.h>
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/* ASN1 packing and unpacking functions */
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/* Turn an ASN1 encoded SEQUENCE OF into a STACK of structures */
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STACK *ASN1_seq_unpack(unsigned char *buf, int len, char *(*d2i)(),
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void (*free_func)())
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{
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STACK *sk;
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unsigned char *pbuf;
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pbuf = buf;
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if (!(sk = d2i_ASN1_SET(NULL, &pbuf, len, d2i, free_func,
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V_ASN1_SEQUENCE, V_ASN1_UNIVERSAL)))
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ASN1err(ASN1_F_ASN1_SEQ_UNPACK,ASN1_R_DECODE_ERROR);
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return sk;
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}
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/* Turn a STACK structures into an ASN1 encoded SEQUENCE OF structure in a
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* Malloc'ed buffer
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*/
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unsigned char *ASN1_seq_pack(STACK *safes, int (*i2d)(), unsigned char **buf,
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int *len)
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{
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int safelen;
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unsigned char *safe, *p;
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if (!(safelen = i2d_ASN1_SET(safes, NULL, i2d, V_ASN1_SEQUENCE,
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V_ASN1_UNIVERSAL, IS_SEQUENCE))) {
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ASN1err(ASN1_F_ASN1_SEQ_PACK,ASN1_R_ENCODE_ERROR);
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return NULL;
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}
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if (!(safe = Malloc (safelen))) {
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ASN1err(ASN1_F_ASN1_SEQ_PACK,ERR_R_MALLOC_FAILURE);
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return NULL;
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}
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p = safe;
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i2d_ASN1_SET(safes, &p, i2d, V_ASN1_SEQUENCE, V_ASN1_UNIVERSAL,
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IS_SEQUENCE);
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if (len) *len = safelen;
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if (buf) *buf = safe;
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return safe;
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}
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/* Extract an ASN1 object from an ASN1_STRING */
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void *ASN1_unpack_string (ASN1_STRING *oct, char *(*d2i)())
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{
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unsigned char *p;
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char *ret;
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p = oct->data;
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if(!(ret = d2i(NULL, &p, oct->length)))
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ASN1err(ASN1_F_ASN1_UNPACK_STRING,ASN1_R_DECODE_ERROR);
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return ret;
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}
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/* Pack an ASN1 object into an ASN1_STRING */
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ASN1_STRING *ASN1_pack_string (void *obj, int (*i2d)(), ASN1_STRING **oct)
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{
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unsigned char *p;
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ASN1_STRING *octmp;
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if (!oct || !*oct) {
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if (!(octmp = ASN1_STRING_new ())) {
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ASN1err(ASN1_F_ASN1_PACK_STRING,ERR_R_MALLOC_FAILURE);
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return NULL;
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}
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if (oct) *oct = octmp;
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} else octmp = *oct;
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if (!(octmp->length = i2d(obj, NULL))) {
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ASN1err(ASN1_F_ASN1_PACK_STRING,ASN1_R_ENCODE_ERROR);
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return NULL;
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}
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if (!(p = Malloc (octmp->length))) {
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ASN1err(ASN1_F_ASN1_PACK_STRING,ERR_R_MALLOC_FAILURE);
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return NULL;
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}
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octmp->data = p;
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i2d (obj, &p);
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return octmp;
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}
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