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/* $OpenBSD: asn_pack.c,v 1.15 2015/12/23 20:37:23 mmcc Exp $ */ |
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/* Written by Dr Stephen N Henson (steve@openssl.org) 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 <openssl/asn1.h> |
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#include <openssl/err.h> |
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#ifndef NO_ASN1_OLD |
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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_OF(OPENSSL_BLOCK) * |
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ASN1_seq_unpack(const unsigned char *buf, int len, d2i_of_void *d2i, |
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void (*free_func)(OPENSSL_BLOCK)) |
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{ |
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STACK_OF(OPENSSL_BLOCK) *sk; |
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const 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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* OPENSSL_malloc'ed buffer |
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*/ |
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unsigned char * |
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ASN1_seq_pack(STACK_OF(OPENSSL_BLOCK) *safes, i2d_of_void *i2d, |
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unsigned char **buf, 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) |
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*len = safelen; |
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if (buf) |
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*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 * |
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ASN1_unpack_string(ASN1_STRING *oct, d2i_of_void *d2i) |
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{ |
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const 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 * |
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ASN1_pack_string(void *obj, i2d_of_void *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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} else |
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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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goto err; |
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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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goto err; |
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} |
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octmp->data = p; |
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i2d (obj, &p); |
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if (oct) |
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*oct = octmp; |
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return octmp; |
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err: |
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if (!oct || octmp != *oct) { |
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ASN1_STRING_free(octmp); |
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if (oct) |
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*oct = NULL; |
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} |
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return NULL; |
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} |
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#endif |
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/* ASN1_ITEM versions of the above */ |
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ASN1_STRING * |
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ASN1_item_pack(void *obj, const ASN1_ITEM *it, ASN1_STRING **oct) |
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{ |
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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_ITEM_PACK, ERR_R_MALLOC_FAILURE); |
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return NULL; |
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} |
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} else |
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octmp = *oct; |
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free(octmp->data); |
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octmp->data = NULL; |
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if (!(octmp->length = ASN1_item_i2d(obj, &octmp->data, it))) { |
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ASN1err(ASN1_F_ASN1_ITEM_PACK, ASN1_R_ENCODE_ERROR); |
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goto err; |
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} |
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if (!octmp->data) { |
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ASN1err(ASN1_F_ASN1_ITEM_PACK, ERR_R_MALLOC_FAILURE); |
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goto err; |
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} |
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if (oct) |
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*oct = octmp; |
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return octmp; |
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err: |
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if (!oct || octmp != *oct) |
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ASN1_STRING_free(octmp); |
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return NULL; |
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} |
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/* Extract an ASN1 object from an ASN1_STRING */ |
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void * |
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ASN1_item_unpack(ASN1_STRING *oct, const ASN1_ITEM *it) |
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{ |
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const unsigned char *p; |
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void *ret; |
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p = oct->data; |
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✗✓ |
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if (!(ret = ASN1_item_d2i(NULL, &p, oct->length, it))) |
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ASN1err(ASN1_F_ASN1_ITEM_UNPACK, ASN1_R_DECODE_ERROR); |
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return ret; |
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} |