crypto/asn1/x_algor.c

   1 /*
   2  * Copyright 1998-2016 The OpenSSL Project Authors. All Rights Reserved.
   3  *
   4  * Licensed under the Apache License 2.0 (the "License").  You may not use
   5  * this file except in compliance with the License.  You can obtain a copy
   6  * in the file LICENSE in the source distribution or at
   7  * https://www.openssl.org/source/license.html
   8  */
   9
  10 #include <stddef.h>
  11 #include <openssl/x509.h>
  12 #include <openssl/asn1.h>
  13 #include <openssl/asn1t.h>
  14 #include "crypto/evp.h"
  15
  16 ASN1_SEQUENCE(X509_ALGOR) = {
  17         ASN1_SIMPLE(X509_ALGOR, algorithm, ASN1_OBJECT),
  18         ASN1_OPT(X509_ALGOR, parameter, ASN1_ANY)
  19 } ASN1_SEQUENCE_END(X509_ALGOR)
  20
  21 ASN1_ITEM_TEMPLATE(X509_ALGORS) =
  22         ASN1_EX_TEMPLATE_TYPE(ASN1_TFLG_SEQUENCE_OF, 0, algorithms, X509_ALGOR)
  23 ASN1_ITEM_TEMPLATE_END(X509_ALGORS)
  24
  25 IMPLEMENT_ASN1_FUNCTIONS(X509_ALGOR)
  26 IMPLEMENT_ASN1_ENCODE_FUNCTIONS_fname(X509_ALGORS, X509_ALGORS, X509_ALGORS)
  27 IMPLEMENT_ASN1_DUP_FUNCTION(X509_ALGOR)
  28
  29 int X509_ALGOR_set0(X509_ALGOR *alg, ASN1_OBJECT *aobj, int ptype, void *pval)
  30 {
  31     if (alg == NULL)
  32         return 0;
  33
  34     if (ptype != V_ASN1_UNDEF) {
  35         if (alg->parameter == NULL)
  36             alg->parameter = ASN1_TYPE_new();
  37         if (alg->parameter == NULL)
  38             return 0;
  39     }
  40
  41     ASN1_OBJECT_free(alg->algorithm);
  42     alg->algorithm = aobj;
  43
  44     if (ptype == 0)
  45         return 1;
  46     if (ptype == V_ASN1_UNDEF) {
  47         ASN1_TYPE_free(alg->parameter);
  48         alg->parameter = NULL;
  49     } else
  50         ASN1_TYPE_set(alg->parameter, ptype, pval);
  51     return 1;
  52 }
  53
  54 void X509_ALGOR_get0(const ASN1_OBJECT **paobj, int *pptype,
  55                      const void **ppval, const X509_ALGOR *algor)
  56 {
  57     if (paobj)
  58         *paobj = algor->algorithm;
  59     if (pptype) {
  60         if (algor->parameter == NULL) {
  61             *pptype = V_ASN1_UNDEF;
  62             return;
  63         } else
  64             *pptype = algor->parameter->type;
  65         if (ppval)
  66             *ppval = algor->parameter->value.ptr;
  67     }
  68 }
  69
  70 /* Set up an X509_ALGOR DigestAlgorithmIdentifier from an EVP_MD */
  71
  72 void X509_ALGOR_set_md(X509_ALGOR *alg, const EVP_MD *md)
  73 {
  74     int param_type;
  75
  76     if (md->flags & EVP_MD_FLAG_DIGALGID_ABSENT)
  77         param_type = V_ASN1_UNDEF;
  78     else
  79         param_type = V_ASN1_NULL;
  80
  81     X509_ALGOR_set0(alg, OBJ_nid2obj(EVP_MD_type(md)), param_type, NULL);
  82
  83 }
  84
  85 int X509_ALGOR_cmp(const X509_ALGOR *a, const X509_ALGOR *b)
  86 {
  87     int rv;
  88     rv = OBJ_cmp(a->algorithm, b->algorithm);
  89     if (rv)
  90         return rv;
  91     if (!a->parameter && !b->parameter)
  92         return 0;
  93     return ASN1_TYPE_cmp(a->parameter, b->parameter);
  94 }