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      1 /* x_algor.c */
      2 /* Written by Dr Stephen N Henson (steve (at) openssl.org) for the OpenSSL
      3  * project 2000.
      4  */
      5 /* ====================================================================
      6  * Copyright (c) 2000 The OpenSSL Project.  All rights reserved.
      7  *
      8  * Redistribution and use in source and binary forms, with or without
      9  * modification, are permitted provided that the following conditions
     10  * are met:
     11  *
     12  * 1. Redistributions of source code must retain the above copyright
     13  *    notice, this list of conditions and the following disclaimer.
     14  *
     15  * 2. Redistributions in binary form must reproduce the above copyright
     16  *    notice, this list of conditions and the following disclaimer in
     17  *    the documentation and/or other materials provided with the
     18  *    distribution.
     19  *
     20  * 3. All advertising materials mentioning features or use of this
     21  *    software must display the following acknowledgment:
     22  *    "This product includes software developed by the OpenSSL Project
     23  *    for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
     24  *
     25  * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
     26  *    endorse or promote products derived from this software without
     27  *    prior written permission. For written permission, please contact
     28  *    licensing (at) OpenSSL.org.
     29  *
     30  * 5. Products derived from this software may not be called "OpenSSL"
     31  *    nor may "OpenSSL" appear in their names without prior written
     32  *    permission of the OpenSSL Project.
     33  *
     34  * 6. Redistributions of any form whatsoever must retain the following
     35  *    acknowledgment:
     36  *    "This product includes software developed by the OpenSSL Project
     37  *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
     38  *
     39  * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
     40  * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     41  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     42  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
     43  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
     44  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     45  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
     46  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     47  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
     48  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     49  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
     50  * OF THE POSSIBILITY OF SUCH DAMAGE.
     51  * ====================================================================
     52  *
     53  * This product includes cryptographic software written by Eric Young
     54  * (eay (at) cryptsoft.com).  This product includes software written by Tim
     55  * Hudson (tjh (at) cryptsoft.com).
     56  *
     57  */
     58 
     59 #include <stddef.h>
     60 #include <openssl/x509.h>
     61 #include <openssl/asn1.h>
     62 #include <openssl/asn1t.h>
     63 
     64 ASN1_SEQUENCE(X509_ALGOR) = {
     65 	ASN1_SIMPLE(X509_ALGOR, algorithm, ASN1_OBJECT),
     66 	ASN1_OPT(X509_ALGOR, parameter, ASN1_ANY)
     67 } ASN1_SEQUENCE_END(X509_ALGOR)
     68 
     69 ASN1_ITEM_TEMPLATE(X509_ALGORS) =
     70 	ASN1_EX_TEMPLATE_TYPE(ASN1_TFLG_SEQUENCE_OF, 0, algorithms, X509_ALGOR)
     71 ASN1_ITEM_TEMPLATE_END(X509_ALGORS)
     72 
     73 IMPLEMENT_ASN1_FUNCTIONS(X509_ALGOR)
     74 IMPLEMENT_ASN1_ENCODE_FUNCTIONS_fname(X509_ALGORS, X509_ALGORS, X509_ALGORS)
     75 IMPLEMENT_ASN1_DUP_FUNCTION(X509_ALGOR)
     76 
     77 IMPLEMENT_STACK_OF(X509_ALGOR)
     78 IMPLEMENT_ASN1_SET_OF(X509_ALGOR)
     79 
     80 int X509_ALGOR_set0(X509_ALGOR *alg, ASN1_OBJECT *aobj, int ptype, void *pval)
     81 	{
     82 	if (!alg)
     83 		return 0;
     84 	if (ptype != V_ASN1_UNDEF)
     85 		{
     86 		if (alg->parameter == NULL)
     87 			alg->parameter = ASN1_TYPE_new();
     88 		if (alg->parameter == NULL)
     89 			return 0;
     90 		}
     91 	if (alg)
     92 		{
     93 		if (alg->algorithm)
     94 			ASN1_OBJECT_free(alg->algorithm);
     95 		alg->algorithm = aobj;
     96 		}
     97 	if (ptype == 0)
     98 		return 1;
     99 	if (ptype == V_ASN1_UNDEF)
    100 		{
    101 		if (alg->parameter)
    102 			{
    103 			ASN1_TYPE_free(alg->parameter);
    104 			alg->parameter = NULL;
    105 			}
    106 		}
    107 	else
    108 		ASN1_TYPE_set(alg->parameter, ptype, pval);
    109 	return 1;
    110 	}
    111 
    112 void X509_ALGOR_get0(ASN1_OBJECT **paobj, int *pptype, void **ppval,
    113 						X509_ALGOR *algor)
    114 	{
    115 	if (paobj)
    116 		*paobj = algor->algorithm;
    117 	if (pptype)
    118 		{
    119 		if (algor->parameter == NULL)
    120 			{
    121 			*pptype = V_ASN1_UNDEF;
    122 			return;
    123 			}
    124 		else
    125 			*pptype = algor->parameter->type;
    126 		if (ppval)
    127 			*ppval = algor->parameter->value.ptr;
    128 		}
    129 	}
    130 
    131 /* Set up an X509_ALGOR DigestAlgorithmIdentifier from an EVP_MD */
    132 
    133 void X509_ALGOR_set_md(X509_ALGOR *alg, const EVP_MD *md)
    134 	{
    135 	int param_type;
    136 
    137 	if (md->flags & EVP_MD_FLAG_DIGALGID_ABSENT)
    138 		param_type = V_ASN1_UNDEF;
    139 	else
    140 		param_type = V_ASN1_NULL;
    141 
    142 	X509_ALGOR_set0(alg, OBJ_nid2obj(EVP_MD_type(md)), param_type, NULL);
    143 
    144 	}
    145