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      1 /*
      2  * Written by Dr Stephen N Henson (steve (at) openssl.org) for the OpenSSL project
      3  * 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 #include <openssl/x509.h>
     58 
     59 #include <openssl/asn1.h>
     60 #include <openssl/asn1t.h>
     61 #include <openssl/digest.h>
     62 #include <openssl/obj.h>
     63 
     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 
     78 IMPLEMENT_ASN1_SET_OF(X509_ALGOR)
     79 
     80 int X509_ALGOR_set0(X509_ALGOR *alg, const ASN1_OBJECT *aobj, int ptype,
     81                     void *pval)
     82 {
     83     if (!alg)
     84         return 0;
     85     if (ptype != V_ASN1_UNDEF) {
     86         if (alg->parameter == NULL)
     87             alg->parameter = ASN1_TYPE_new();
     88         if (alg->parameter == NULL)
     89             return 0;
     90     }
     91     if (alg) {
     92         if (alg->algorithm)
     93             ASN1_OBJECT_free(alg->algorithm);
     94         alg->algorithm = (ASN1_OBJECT *)aobj;
     95     }
     96     if (ptype == 0)
     97         return 1;
     98     if (ptype == V_ASN1_UNDEF) {
     99         if (alg->parameter) {
    100             ASN1_TYPE_free(alg->parameter);
    101             alg->parameter = NULL;
    102         }
    103     } else
    104         ASN1_TYPE_set(alg->parameter, ptype, pval);
    105     return 1;
    106 }
    107 
    108 void X509_ALGOR_get0(const ASN1_OBJECT **paobj, int *pptype, const void **ppval,
    109                      const X509_ALGOR *algor)
    110 {
    111     if (paobj)
    112         *paobj = algor->algorithm;
    113     if (pptype) {
    114         if (algor->parameter == NULL) {
    115             *pptype = V_ASN1_UNDEF;
    116             return;
    117         } else
    118             *pptype = algor->parameter->type;
    119         if (ppval)
    120             *ppval = algor->parameter->value.ptr;
    121     }
    122 }
    123 
    124 /* Set up an X509_ALGOR DigestAlgorithmIdentifier from an EVP_MD */
    125 
    126 void X509_ALGOR_set_md(X509_ALGOR *alg, const EVP_MD *md)
    127 {
    128     int param_type;
    129 
    130     if (EVP_MD_flags(md) & EVP_MD_FLAG_DIGALGID_ABSENT)
    131         param_type = V_ASN1_UNDEF;
    132     else
    133         param_type = V_ASN1_NULL;
    134 
    135     X509_ALGOR_set0(alg, OBJ_nid2obj(EVP_MD_type(md)), param_type, NULL);
    136 
    137 }
    138 
    139 /*
    140  * X509_ALGOR_cmp returns 0 if |a| and |b| are equal and non-zero otherwise.
    141  */
    142 int X509_ALGOR_cmp(const X509_ALGOR *a, const X509_ALGOR *b)
    143 {
    144     int rv;
    145     rv = OBJ_cmp(a->algorithm, b->algorithm);
    146     if (rv)
    147         return rv;
    148     if (!a->parameter && !b->parameter)
    149         return 0;
    150     return ASN1_TYPE_cmp(a->parameter, b->parameter);
    151 }
    152