asn_pack.c
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- /* asn_pack.c */
- /* Written by Dr Stephen N Henson (shenson@bigfoot.com) 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 "cryptlib.h"
- #include <openssl/asn1.h>
- #ifndef NO_ASN1_OLD
- /* ASN1 packing and unpacking functions */
- /* Turn an ASN1 encoded SEQUENCE OF into a STACK of structures */
- STACK *ASN1_seq_unpack(const unsigned char *buf, int len,
- d2i_of_void *d2i,void (*free_func)(void *))
- {
- STACK *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 *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 = OPENSSL_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;
- }
- if (oct) *oct = octmp;
- } else octmp = *oct;
-
- if (!(octmp->length = i2d(obj, NULL))) {
- ASN1err(ASN1_F_ASN1_PACK_STRING,ASN1_R_ENCODE_ERROR);
- return NULL;
- }
- if (!(p = OPENSSL_malloc (octmp->length))) {
- ASN1err(ASN1_F_ASN1_PACK_STRING,ERR_R_MALLOC_FAILURE);
- return NULL;
- }
- octmp->data = p;
- i2d (obj, &p);
- return octmp;
- }
- #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;
- }
- if (oct) *oct = octmp;
- } else octmp = *oct;
- if(octmp->data) {
- OPENSSL_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);
- return NULL;
- }
- if (!octmp->data) {
- ASN1err(ASN1_F_ASN1_ITEM_PACK,ERR_R_MALLOC_FAILURE);
- return NULL;
- }
- return octmp;
- }
- /* 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;
- }