Line data Source code
1 : /* ====================================================================
2 : * Copyright (c) 2000 The OpenSSL Project. All rights reserved.
3 : *
4 : * Redistribution and use in source and binary forms, with or without
5 : * modification, are permitted provided that the following conditions
6 : * are met:
7 : *
8 : * 1. Redistributions of source code must retain the above copyright
9 : * notice, this list of conditions and the following disclaimer.
10 : *
11 : * 2. Redistributions in binary form must reproduce the above copyright
12 : * notice, this list of conditions and the following disclaimer in
13 : * the documentation and/or other materials provided with the
14 : * distribution.
15 : *
16 : * 3. All advertising materials mentioning features or use of this
17 : * software must display the following acknowledgment:
18 : * "This product includes software developed by the OpenSSL Project
19 : * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
20 : *
21 : * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
22 : * endorse or promote products derived from this software without
23 : * prior written permission. For written permission, please contact
24 : * licensing@OpenSSL.org.
25 : *
26 : * 5. Products derived from this software may not be called "OpenSSL"
27 : * nor may "OpenSSL" appear in their names without prior written
28 : * permission of the OpenSSL Project.
29 : *
30 : * 6. Redistributions of any form whatsoever must retain the following
31 : * acknowledgment:
32 : * "This product includes software developed by the OpenSSL Project
33 : * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
34 : *
35 : * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
36 : * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
37 : * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
38 : * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
39 : * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
40 : * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
41 : * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
42 : * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
43 : * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
44 : * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
45 : * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
46 : * OF THE POSSIBILITY OF SUCH DAMAGE.
47 : * ====================================================================
48 : *
49 : * This product includes cryptographic software written by Eric Young
50 : * (eay@cryptsoft.com). This product includes software written by Tim
51 : * Hudson (tjh@cryptsoft.com).
52 : *
53 : */
54 :
55 : #include "eng_int.h"
56 :
57 : /*
58 : * If this symbol is defined then ENGINE_get_digest_engine(), the function
59 : * that is used by EVP to hook in digest code and cache defaults (etc), will
60 : * display brief debugging summaries to stderr with the 'nid'.
61 : */
62 : /* #define ENGINE_DIGEST_DEBUG */
63 :
64 : static ENGINE_TABLE *digest_table = NULL;
65 :
66 0 : void ENGINE_unregister_digests(ENGINE *e)
67 : {
68 0 : engine_table_unregister(&digest_table, e);
69 0 : }
70 :
71 0 : static void engine_unregister_all_digests(void)
72 : {
73 0 : engine_table_cleanup(&digest_table);
74 0 : }
75 :
76 0 : int ENGINE_register_digests(ENGINE *e)
77 : {
78 0 : if (e->digests) {
79 : const int *nids;
80 0 : int num_nids = e->digests(e, NULL, &nids, 0);
81 0 : if (num_nids > 0)
82 0 : return engine_table_register(&digest_table,
83 : engine_unregister_all_digests, e,
84 : nids, num_nids, 0);
85 : }
86 : return 1;
87 : }
88 :
89 0 : void ENGINE_register_all_digests()
90 : {
91 : ENGINE *e;
92 :
93 0 : for (e = ENGINE_get_first(); e; e = ENGINE_get_next(e))
94 0 : ENGINE_register_digests(e);
95 0 : }
96 :
97 0 : int ENGINE_set_default_digests(ENGINE *e)
98 : {
99 0 : if (e->digests) {
100 : const int *nids;
101 0 : int num_nids = e->digests(e, NULL, &nids, 0);
102 0 : if (num_nids > 0)
103 0 : return engine_table_register(&digest_table,
104 : engine_unregister_all_digests, e,
105 : nids, num_nids, 1);
106 : }
107 : return 1;
108 : }
109 :
110 : /*
111 : * Exposed API function to get a functional reference from the implementation
112 : * table (ie. try to get a functional reference from the tabled structural
113 : * references) for a given digest 'nid'
114 : */
115 54099 : ENGINE *ENGINE_get_digest_engine(int nid)
116 : {
117 54099 : return engine_table_select(&digest_table, nid);
118 : }
119 :
120 : /* Obtains a digest implementation from an ENGINE functional reference */
121 0 : const EVP_MD *ENGINE_get_digest(ENGINE *e, int nid)
122 : {
123 : const EVP_MD *ret;
124 : ENGINE_DIGESTS_PTR fn = ENGINE_get_digests(e);
125 0 : if (!fn || !fn(e, &ret, NULL, nid)) {
126 0 : ENGINEerr(ENGINE_F_ENGINE_GET_DIGEST, ENGINE_R_UNIMPLEMENTED_DIGEST);
127 0 : return NULL;
128 : }
129 0 : return ret;
130 : }
131 :
132 : /* Gets the digest callback from an ENGINE structure */
133 0 : ENGINE_DIGESTS_PTR ENGINE_get_digests(const ENGINE *e)
134 : {
135 0 : return e->digests;
136 : }
137 :
138 : /* Sets the digest callback in an ENGINE structure */
139 0 : int ENGINE_set_digests(ENGINE *e, ENGINE_DIGESTS_PTR f)
140 : {
141 0 : e->digests = f;
142 0 : return 1;
143 : }
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