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-rw-r--r--src/lib/libcrypto/engine/tb_digest.c143
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diff --git a/src/lib/libcrypto/engine/tb_digest.c b/src/lib/libcrypto/engine/tb_digest.c
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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/* If this symbol is defined then ENGINE_get_digest_engine(), the function that
58 * is used by EVP to hook in digest code and cache defaults (etc), will display
59 * brief debugging summaries to stderr with the 'nid'. */
60/* #define ENGINE_DIGEST_DEBUG */
61
62static ENGINE_TABLE *digest_table = NULL;
63
64void ENGINE_unregister_digests(ENGINE *e)
65 {
66 engine_table_unregister(&digest_table, e);
67 }
68
69static void engine_unregister_all_digests(void)
70 {
71 engine_table_cleanup(&digest_table);
72 }
73
74int ENGINE_register_digests(ENGINE *e)
75 {
76 if(e->digests)
77 {
78 const int *nids;
79 int num_nids = e->digests(e, NULL, &nids, 0);
80 if(num_nids > 0)
81 return engine_table_register(&digest_table,
82 engine_unregister_all_digests, e, nids,
83 num_nids, 0);
84 }
85 return 1;
86 }
87
88void ENGINE_register_all_digests()
89 {
90 ENGINE *e;
91
92 for(e=ENGINE_get_first() ; e ; e=ENGINE_get_next(e))
93 ENGINE_register_digests(e);
94 }
95
96int ENGINE_set_default_digests(ENGINE *e)
97 {
98 if(e->digests)
99 {
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, nids,
105 num_nids, 1);
106 }
107 return 1;
108 }
109
110/* Exposed API function to get a functional reference from the implementation
111 * table (ie. try to get a functional reference from the tabled structural
112 * references) for a given digest 'nid' */
113ENGINE *ENGINE_get_digest_engine(int nid)
114 {
115 return engine_table_select(&digest_table, nid);
116 }
117
118/* Obtains a digest implementation from an ENGINE functional reference */
119const EVP_MD *ENGINE_get_digest(ENGINE *e, int nid)
120 {
121 const EVP_MD *ret;
122 ENGINE_DIGESTS_PTR fn = ENGINE_get_digests(e);
123 if(!fn || !fn(e, &ret, NULL, nid))
124 {
125 ENGINEerr(ENGINE_F_ENGINE_GET_DIGEST,
126 ENGINE_R_UNIMPLEMENTED_DIGEST);
127 return NULL;
128 }
129 return ret;
130 }
131
132/* Gets the digest callback from an ENGINE structure */
133ENGINE_DIGESTS_PTR ENGINE_get_digests(const ENGINE *e)
134 {
135 return e->digests;
136 }
137
138/* Sets the digest callback in an ENGINE structure */
139int ENGINE_set_digests(ENGINE *e, ENGINE_DIGESTS_PTR f)
140 {
141 e->digests = f;
142 return 1;
143 }
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