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/* $OpenBSD: asn_pack.c,v 1.15 2015/12/23 20:37:23 mmcc Exp $ */
/* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
* project 1999.
*/
/* ====================================================================
* Copyright (c) 1999 The OpenSSL Project. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* 3. All advertising materials mentioning features or use of this
* software must display the following acknowledgment:
* "This product includes software developed by the OpenSSL Project
* for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
*
* 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
* endorse or promote products derived from this software without
* prior written permission. For written permission, please contact
* licensing@OpenSSL.org.
*
* 5. Products derived from this software may not be called "OpenSSL"
* nor may "OpenSSL" appear in their names without prior written
* permission of the OpenSSL Project.
*
* 6. Redistributions of any form whatsoever must retain the following
* acknowledgment:
* "This product includes software developed by the OpenSSL Project
* for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
*
* THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
* EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
* OF THE POSSIBILITY OF SUCH DAMAGE.
* ====================================================================
*
* This product includes cryptographic software written by Eric Young
* (eay@cryptsoft.com). This product includes software written by Tim
* Hudson (tjh@cryptsoft.com).
*
*/
#include <stdio.h>
#include <openssl/asn1.h>
#include <openssl/err.h>
#ifndef NO_ASN1_OLD
/* ASN1 packing and unpacking functions */
/* Turn an ASN1 encoded SEQUENCE OF into a STACK of structures */
STACK_OF(OPENSSL_BLOCK) *
ASN1_seq_unpack(const unsigned char *buf, int len, d2i_of_void *d2i,
void (*free_func)(OPENSSL_BLOCK))
{
STACK_OF(OPENSSL_BLOCK) *sk;
const unsigned char *pbuf;
pbuf = buf;
if (!(sk = d2i_ASN1_SET(NULL, &pbuf, len, d2i, free_func,
V_ASN1_SEQUENCE, V_ASN1_UNIVERSAL)))
ASN1err(ASN1_F_ASN1_SEQ_UNPACK,ASN1_R_DECODE_ERROR);
return sk;
}
/* Turn a STACK structures into an ASN1 encoded SEQUENCE OF structure in a
* OPENSSL_malloc'ed buffer
*/
unsigned char *
ASN1_seq_pack(STACK_OF(OPENSSL_BLOCK) *safes, i2d_of_void *i2d,
unsigned char **buf, int *len)
{
int safelen;
unsigned char *safe, *p;
if (!(safelen = i2d_ASN1_SET(safes, NULL, i2d, V_ASN1_SEQUENCE,
V_ASN1_UNIVERSAL, IS_SEQUENCE))) {
ASN1err(ASN1_F_ASN1_SEQ_PACK,ASN1_R_ENCODE_ERROR);
return NULL;
}
if (!(safe = malloc(safelen))) {
ASN1err(ASN1_F_ASN1_SEQ_PACK,ERR_R_MALLOC_FAILURE);
return NULL;
}
p = safe;
i2d_ASN1_SET(safes, &p, i2d, V_ASN1_SEQUENCE, V_ASN1_UNIVERSAL,
IS_SEQUENCE);
if (len)
*len = safelen;
if (buf)
*buf = safe;
return safe;
}
/* Extract an ASN1 object from an ASN1_STRING */
void *
ASN1_unpack_string(ASN1_STRING *oct, d2i_of_void *d2i)
{
const unsigned char *p;
char *ret;
p = oct->data;
if (!(ret = d2i(NULL, &p, oct->length)))
ASN1err(ASN1_F_ASN1_UNPACK_STRING,ASN1_R_DECODE_ERROR);
return ret;
}
/* Pack an ASN1 object into an ASN1_STRING */
ASN1_STRING *
ASN1_pack_string(void *obj, i2d_of_void *i2d, ASN1_STRING **oct)
{
unsigned char *p;
ASN1_STRING *octmp;
if (!oct || !*oct) {
if (!(octmp = ASN1_STRING_new())) {
ASN1err(ASN1_F_ASN1_PACK_STRING,ERR_R_MALLOC_FAILURE);
return NULL;
}
} else
octmp = *oct;
if (!(octmp->length = i2d(obj, NULL))) {
ASN1err(ASN1_F_ASN1_PACK_STRING,ASN1_R_ENCODE_ERROR);
goto err;
}
if (!(p = malloc (octmp->length))) {
ASN1err(ASN1_F_ASN1_PACK_STRING,ERR_R_MALLOC_FAILURE);
goto err;
}
octmp->data = p;
i2d (obj, &p);
if (oct)
*oct = octmp;
return octmp;
err:
if (!oct || octmp != *oct) {
ASN1_STRING_free(octmp);
if (oct)
*oct = NULL;
}
return NULL;
}
#endif
/* ASN1_ITEM versions of the above */
ASN1_STRING *
ASN1_item_pack(void *obj, const ASN1_ITEM *it, ASN1_STRING **oct)
{
ASN1_STRING *octmp;
if (!oct || !*oct) {
if (!(octmp = ASN1_STRING_new ())) {
ASN1err(ASN1_F_ASN1_ITEM_PACK, ERR_R_MALLOC_FAILURE);
return NULL;
}
} else
octmp = *oct;
free(octmp->data);
octmp->data = NULL;
if (!(octmp->length = ASN1_item_i2d(obj, &octmp->data, it))) {
ASN1err(ASN1_F_ASN1_ITEM_PACK, ASN1_R_ENCODE_ERROR);
goto err;
}
if (!octmp->data) {
ASN1err(ASN1_F_ASN1_ITEM_PACK, ERR_R_MALLOC_FAILURE);
goto err;
}
if (oct)
*oct = octmp;
return octmp;
err:
if (!oct || octmp != *oct)
ASN1_STRING_free(octmp);
return NULL;
}
/* Extract an ASN1 object from an ASN1_STRING */
void *
ASN1_item_unpack(ASN1_STRING *oct, const ASN1_ITEM *it)
{
const unsigned char *p;
void *ret;
p = oct->data;
if (!(ret = ASN1_item_d2i(NULL, &p, oct->length, it)))
ASN1err(ASN1_F_ASN1_ITEM_UNPACK, ASN1_R_DECODE_ERROR);
return ret;
}
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