crypto/asn1/x_algor.c

   1 /* x_algor.c */
   2 /*
   3  * Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL project
   4  * 2000.
   5  */
   6 /* ====================================================================
   7  * Copyright (c) 2000 The OpenSSL Project.  All rights reserved.
   8  *
   9  * Redistribution and use in source and binary forms, with or without
  10  * modification, are permitted provided that the following conditions
  11  * are met:
  12  *
  13  * 1. Redistributions of source code must retain the above copyright
  14  *    notice, this list of conditions and the following disclaimer.
  15  *
  16  * 2. Redistributions in binary form must reproduce the above copyright
  17  *    notice, this list of conditions and the following disclaimer in
  18  *    the documentation and/or other materials provided with the
  19  *    distribution.
  20  *
  21  * 3. All advertising materials mentioning features or use of this
  22  *    software must display the following acknowledgment:
  23  *    "This product includes software developed by the OpenSSL Project
  24  *    for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
  25  *
  26  * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
  27  *    endorse or promote products derived from this software without
  28  *    prior written permission. For written permission, please contact
  29  *    licensing@OpenSSL.org.
  30  *
  31  * 5. Products derived from this software may not be called "OpenSSL"
  32  *    nor may "OpenSSL" appear in their names without prior written
  33  *    permission of the OpenSSL Project.
  34  *
  35  * 6. Redistributions of any form whatsoever must retain the following
  36  *    acknowledgment:
  37  *    "This product includes software developed by the OpenSSL Project
  38  *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
  39  *
  40  * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
  41  * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  42  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  43  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
  44  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  45  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  46  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  47  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  48  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  49  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  50  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
  51  * OF THE POSSIBILITY OF SUCH DAMAGE.
  52  * ====================================================================
  53  *
  54  * This product includes cryptographic software written by Eric Young
  55  * (eay@cryptsoft.com).  This product includes software written by Tim
  56  * Hudson (tjh@cryptsoft.com).
  57  *
  58  */
  59
  60 #include <stddef.h>
  61 #include <openssl/x509.h>
  62 #include <openssl/asn1.h>
  63 #include <openssl/asn1t.h>
  64
  65 ASN1_SEQUENCE(X509_ALGOR) = {
  66         ASN1_SIMPLE(X509_ALGOR, algorithm, ASN1_OBJECT),
  67         ASN1_OPT(X509_ALGOR, parameter, ASN1_ANY)
  68 } ASN1_SEQUENCE_END(X509_ALGOR)
  69
  70 ASN1_ITEM_TEMPLATE(X509_ALGORS) =
  71         ASN1_EX_TEMPLATE_TYPE(ASN1_TFLG_SEQUENCE_OF, 0, algorithms, X509_ALGOR)
  72 ASN1_ITEM_TEMPLATE_END(X509_ALGORS)
  73
  74 IMPLEMENT_ASN1_FUNCTIONS(X509_ALGOR)
  75 IMPLEMENT_ASN1_ENCODE_FUNCTIONS_fname(X509_ALGORS, X509_ALGORS, X509_ALGORS)
  76 IMPLEMENT_ASN1_DUP_FUNCTION(X509_ALGOR)
  77 IMPLEMENT_ASN1_SET_OF(X509_ALGOR)
  78
  79 int X509_ALGOR_set0(X509_ALGOR *alg, ASN1_OBJECT *aobj, int ptype, void *pval)
  80 {
  81     if (!alg)
  82         return 0;
  83     if (ptype != V_ASN1_UNDEF) {
  84         if (alg->parameter == NULL)
  85             alg->parameter = ASN1_TYPE_new();
  86         if (alg->parameter == NULL)
  87             return 0;
  88     }
  89     if (alg) {
  90         if (alg->algorithm)
  91             ASN1_OBJECT_free(alg->algorithm);
  92         alg->algorithm = aobj;
  93     }
  94     if (ptype == 0)
  95         return 1;
  96     if (ptype == V_ASN1_UNDEF) {
  97         if (alg->parameter) {
  98             ASN1_TYPE_free(alg->parameter);
  99             alg->parameter = NULL;
 100         }
 101     } else
 102         ASN1_TYPE_set(alg->parameter, ptype, pval);
 103     return 1;
 104 }
 105
 106 void X509_ALGOR_get0(ASN1_OBJECT **paobj, int *pptype, void **ppval,
 107                      X509_ALGOR *algor)
 108 {
 109     if (paobj)
 110         *paobj = algor->algorithm;
 111     if (pptype) {
 112         if (algor->parameter == NULL) {
 113             *pptype = V_ASN1_UNDEF;
 114             return;
 115         } else
 116             *pptype = algor->parameter->type;
 117         if (ppval)
 118             *ppval = algor->parameter->value.ptr;
 119     }
 120 }
 121
 122 /* Set up an X509_ALGOR DigestAlgorithmIdentifier from an EVP_MD */
 123
 124 void X509_ALGOR_set_md(X509_ALGOR *alg, const EVP_MD *md)
 125 {
 126     int param_type;
 127
 128     if (md->flags & EVP_MD_FLAG_DIGALGID_ABSENT)
 129         param_type = V_ASN1_UNDEF;
 130     else
 131         param_type = V_ASN1_NULL;
 132
 133     X509_ALGOR_set0(alg, OBJ_nid2obj(EVP_MD_type(md)), param_type, NULL);
 134
 135 }
 136
 137 int X509_ALGOR_cmp(const X509_ALGOR *a, const X509_ALGOR *b)
 138 {
 139     int rv;
 140     rv = OBJ_cmp(a->algorithm, b->algorithm);
 141     if (rv)
 142         return rv;
 143     if (!a->parameter && !b->parameter)
 144         return 0;
 145     return ASN1_TYPE_cmp(a->parameter, b->parameter);
 146 }