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b370230b GT |
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 | |
0f113f3e | 9 | * notice, this list of conditions and the following disclaimer. |
b370230b GT |
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 | ||
b370230b GT |
55 | #include "eng_int.h" |
56 | ||
0f113f3e MC |
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 | */ | |
b370230b GT |
62 | /* #define ENGINE_DIGEST_DEBUG */ |
63 | ||
64 | static ENGINE_TABLE *digest_table = NULL; | |
65 | ||
66 | void ENGINE_unregister_digests(ENGINE *e) | |
0f113f3e MC |
67 | { |
68 | engine_table_unregister(&digest_table, e); | |
69 | } | |
b370230b | 70 | |
6d52f260 | 71 | static void engine_unregister_all_digests(void) |
0f113f3e MC |
72 | { |
73 | engine_table_cleanup(&digest_table); | |
74 | } | |
b370230b GT |
75 | |
76 | int ENGINE_register_digests(ENGINE *e) | |
0f113f3e MC |
77 | { |
78 | if (e->digests) { | |
79 | const int *nids; | |
80 | int num_nids = e->digests(e, NULL, &nids, 0); | |
81 | if (num_nids > 0) | |
82 | return engine_table_register(&digest_table, | |
83 | engine_unregister_all_digests, e, | |
84 | nids, num_nids, 0); | |
85 | } | |
86 | return 1; | |
87 | } | |
b370230b GT |
88 | |
89 | void ENGINE_register_all_digests() | |
0f113f3e MC |
90 | { |
91 | ENGINE *e; | |
b370230b | 92 | |
0f113f3e MC |
93 | for (e = ENGINE_get_first(); e; e = ENGINE_get_next(e)) |
94 | ENGINE_register_digests(e); | |
95 | } | |
b370230b GT |
96 | |
97 | int ENGINE_set_default_digests(ENGINE *e) | |
0f113f3e MC |
98 | { |
99 | if (e->digests) { | |
100 | const int *nids; | |
101 | int num_nids = e->digests(e, NULL, &nids, 0); | |
102 | if (num_nids > 0) | |
103 | return engine_table_register(&digest_table, | |
104 | engine_unregister_all_digests, e, | |
105 | nids, num_nids, 1); | |
106 | } | |
107 | return 1; | |
108 | } | |
b370230b | 109 | |
0f113f3e MC |
110 | /* |
111 | * Exposed API function to get a functional reference from the implementation | |
b370230b | 112 | * table (ie. try to get a functional reference from the tabled structural |
0f113f3e MC |
113 | * references) for a given digest 'nid' |
114 | */ | |
b370230b | 115 | ENGINE *ENGINE_get_digest_engine(int nid) |
0f113f3e MC |
116 | { |
117 | return engine_table_select(&digest_table, nid); | |
118 | } | |
b370230b GT |
119 | |
120 | /* Obtains a digest implementation from an ENGINE functional reference */ | |
121 | const EVP_MD *ENGINE_get_digest(ENGINE *e, int nid) | |
0f113f3e MC |
122 | { |
123 | const EVP_MD *ret; | |
124 | ENGINE_DIGESTS_PTR fn = ENGINE_get_digests(e); | |
125 | if (!fn || !fn(e, &ret, NULL, nid)) { | |
126 | ENGINEerr(ENGINE_F_ENGINE_GET_DIGEST, ENGINE_R_UNIMPLEMENTED_DIGEST); | |
127 | return NULL; | |
128 | } | |
129 | return ret; | |
130 | } | |
b370230b GT |
131 | |
132 | /* Gets the digest callback from an ENGINE structure */ | |
133 | ENGINE_DIGESTS_PTR ENGINE_get_digests(const ENGINE *e) | |
0f113f3e MC |
134 | { |
135 | return e->digests; | |
136 | } | |
b370230b GT |
137 | |
138 | /* Sets the digest callback in an ENGINE structure */ | |
139 | int ENGINE_set_digests(ENGINE *e, ENGINE_DIGESTS_PTR f) | |
0f113f3e MC |
140 | { |
141 | e->digests = f; | |
142 | return 1; | |
143 | } |