1 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
2 * All rights reserved.
3 *
4 * This package is an SSL implementation written
5 * by Eric Young (eay@cryptsoft.com).
6 * The implementation was written so as to conform with Netscapes SSL.
7 *
8 * This library is free for commercial and non-commercial use as long as
9 * the following conditions are aheared to. The following conditions
10 * apply to all code found in this distribution, be it the RC4, RSA,
11 * lhash, DES, etc., code; not just the SSL code. The SSL documentation
12 * included with this distribution is covered by the same copyright terms
13 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
14 *
15 * Copyright remains Eric Young's, and as such any Copyright notices in
16 * the code are not to be removed.
17 * If this package is used in a product, Eric Young should be given attribution
18 * as the author of the parts of the library used.
19 * This can be in the form of a textual message at program startup or
20 * in documentation (online or textual) provided with the package.
21 *
22 * Redistribution and use in source and binary forms, with or without
23 * modification, are permitted provided that the following conditions
24 * are met:
25 * 1. Redistributions of source code must retain the copyright
26 * notice, this list of conditions and the following disclaimer.
27 * 2. Redistributions in binary form must reproduce the above copyright
28 * notice, this list of conditions and the following disclaimer in the
29 * documentation and/or other materials provided with the distribution.
30 * 3. All advertising materials mentioning features or use of this software
31 * must display the following acknowledgement:
32 * "This product includes cryptographic software written by
33 * Eric Young (eay@cryptsoft.com)"
34 * The word 'cryptographic' can be left out if the rouines from the library
35 * being used are not cryptographic related :-).
36 * 4. If you include any Windows specific code (or a derivative thereof) from
37 * the apps directory (application code) you must include an acknowledgement:
38 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
39 *
40 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
41 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
42 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
43 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
44 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
45 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
46 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
47 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
48 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
49 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
50 * SUCH DAMAGE.
51 *
52 * The licence and distribution terms for any publically available version or
53 * derivative of this code cannot be changed. i.e. this code cannot simply be
54 * copied and put under another distribution licence
55 * [including the GNU Public Licence.] */
56
57 #include <openssl/evp.h>
58
59 #include <assert.h>
60
61 #include <openssl/asn1.h>
62 #include <openssl/err.h>
63 #include <openssl/obj.h>
64 #include <openssl/x509.h>
65
66 #include "internal.h"
67
68
EVP_DigestSignAlgorithm(EVP_MD_CTX * ctx,X509_ALGOR * algor)69 int EVP_DigestSignAlgorithm(EVP_MD_CTX *ctx, X509_ALGOR *algor) {
70 const EVP_MD *digest;
71 EVP_PKEY *pkey;
72 int sign_nid, paramtype;
73
74 digest = EVP_MD_CTX_md(ctx);
75 pkey = EVP_PKEY_CTX_get0_pkey(ctx->pctx);
76 if (!digest || !pkey) {
77 OPENSSL_PUT_ERROR(EVP, EVP_R_CONTEXT_NOT_INITIALISED);
78 return 0;
79 }
80
81 if (pkey->ameth->digest_sign_algorithm) {
82 switch (pkey->ameth->digest_sign_algorithm(ctx, algor)) {
83 case EVP_DIGEST_SIGN_ALGORITHM_ERROR:
84 return 0;
85 case EVP_DIGEST_SIGN_ALGORITHM_SUCCESS:
86 return 1;
87 case EVP_DIGEST_SIGN_ALGORITHM_DEFAULT:
88 /* Use default behavior. */
89 break;
90 default:
91 assert(0);
92 }
93 }
94
95 /* Default behavior: look up the OID for the algorithm/hash pair and encode
96 * that. */
97 if (!OBJ_find_sigid_by_algs(&sign_nid, EVP_MD_type(digest),
98 pkey->ameth->pkey_id)) {
99 OPENSSL_PUT_ERROR(EVP, EVP_R_DIGEST_AND_KEY_TYPE_NOT_SUPPORTED);
100 return 0;
101 }
102
103 if (pkey->ameth->pkey_flags & ASN1_PKEY_SIGPARAM_NULL) {
104 paramtype = V_ASN1_NULL;
105 } else {
106 paramtype = V_ASN1_UNDEF;
107 }
108
109 X509_ALGOR_set0(algor, OBJ_nid2obj(sign_nid), paramtype, NULL);
110 return 1;
111 }
112
EVP_DigestVerifyInitFromAlgorithm(EVP_MD_CTX * ctx,X509_ALGOR * algor,EVP_PKEY * pkey)113 int EVP_DigestVerifyInitFromAlgorithm(EVP_MD_CTX *ctx,
114 X509_ALGOR *algor,
115 EVP_PKEY *pkey) {
116 int digest_nid, pkey_nid;
117 const EVP_PKEY_ASN1_METHOD *ameth;
118 const EVP_MD *digest;
119
120 /* Convert signature OID into digest and public key OIDs */
121 if (!OBJ_find_sigid_algs(OBJ_obj2nid(algor->algorithm), &digest_nid,
122 &pkey_nid)) {
123 OPENSSL_PUT_ERROR(EVP, EVP_R_UNKNOWN_SIGNATURE_ALGORITHM);
124 return 0;
125 }
126
127 /* Check public key OID matches public key type */
128 ameth = EVP_PKEY_asn1_find(NULL, pkey_nid);
129 if (ameth == NULL || ameth->pkey_id != pkey->ameth->pkey_id) {
130 OPENSSL_PUT_ERROR(EVP, EVP_R_WRONG_PUBLIC_KEY_TYPE);
131 return 0;
132 }
133
134 /* NID_undef signals that there are custom parameters to set. */
135 if (digest_nid == NID_undef) {
136 if (!pkey->ameth || !pkey->ameth->digest_verify_init_from_algorithm) {
137 OPENSSL_PUT_ERROR(EVP, EVP_R_UNKNOWN_SIGNATURE_ALGORITHM);
138 return 0;
139 }
140
141 return pkey->ameth->digest_verify_init_from_algorithm(ctx, algor, pkey);
142 }
143
144 /* Otherwise, initialize with the digest from the OID. */
145 digest = EVP_get_digestbynid(digest_nid);
146 if (digest == NULL) {
147 OPENSSL_PUT_ERROR(EVP, EVP_R_UNKNOWN_MESSAGE_DIGEST_ALGORITHM);
148 return 0;
149 }
150
151 return EVP_DigestVerifyInit(ctx, NULL, digest, NULL, pkey);
152 }
153
154