Address some code-analysis issues.
[openssl.git] / crypto / asn1 / x_algor.c
1 /*
2  * Copyright 1998-2016 The OpenSSL Project Authors. All Rights Reserved.
3  *
4  * Licensed under the OpenSSL license (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 "internal/evp_int.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 }