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-rw-r--r--src/lib/libcrypto/engine/tb_digest.c152
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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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index f1a2e8a6b3..0000000000
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1/* $OpenBSD: tb_digest.c,v 1.8 2017/01/29 17:49:23 beck Exp $ */
2/* ====================================================================
3 * Copyright (c) 2000 The OpenSSL Project. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 *
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 *
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in
14 * the documentation and/or other materials provided with the
15 * distribution.
16 *
17 * 3. All advertising materials mentioning features or use of this
18 * software must display the following acknowledgment:
19 * "This product includes software developed by the OpenSSL Project
20 * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
21 *
22 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
23 * endorse or promote products derived from this software without
24 * prior written permission. For written permission, please contact
25 * licensing@OpenSSL.org.
26 *
27 * 5. Products derived from this software may not be called "OpenSSL"
28 * nor may "OpenSSL" appear in their names without prior written
29 * permission of the OpenSSL Project.
30 *
31 * 6. Redistributions of any form whatsoever must retain the following
32 * acknowledgment:
33 * "This product includes software developed by the OpenSSL Project
34 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
35 *
36 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
37 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
38 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
39 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
40 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
41 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
42 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
43 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
44 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
45 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
46 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
47 * OF THE POSSIBILITY OF SUCH DAMAGE.
48 * ====================================================================
49 *
50 * This product includes cryptographic software written by Eric Young
51 * (eay@cryptsoft.com). This product includes software written by Tim
52 * Hudson (tjh@cryptsoft.com).
53 *
54 */
55
56#include <openssl/err.h>
57
58#include "eng_int.h"
59
60/* If this symbol is defined then ENGINE_get_digest_engine(), the function that
61 * is used by EVP to hook in digest code and cache defaults (etc), will display
62 * brief debugging summaries to stderr with the 'nid'. */
63/* #define ENGINE_DIGEST_DEBUG */
64
65static ENGINE_TABLE *digest_table = NULL;
66
67void
68ENGINE_unregister_digests(ENGINE *e)
69{
70 engine_table_unregister(&digest_table, e);
71}
72
73static void
74engine_unregister_all_digests(void)
75{
76 engine_table_cleanup(&digest_table);
77}
78
79int
80ENGINE_register_digests(ENGINE *e)
81{
82 if (e->digests) {
83 const int *nids;
84 int num_nids = e->digests(e, NULL, &nids, 0);
85 if (num_nids > 0)
86 return engine_table_register(&digest_table,
87 engine_unregister_all_digests, e, nids,
88 num_nids, 0);
89 }
90 return 1;
91}
92
93void
94ENGINE_register_all_digests(void)
95{
96 ENGINE *e;
97
98 for (e = ENGINE_get_first(); e; e = ENGINE_get_next(e))
99 ENGINE_register_digests(e);
100}
101
102int
103ENGINE_set_default_digests(ENGINE *e)
104{
105 if (e->digests) {
106 const int *nids;
107 int num_nids = e->digests(e, NULL, &nids, 0);
108 if (num_nids > 0)
109 return engine_table_register(&digest_table,
110 engine_unregister_all_digests, e, nids,
111 num_nids, 1);
112 }
113 return 1;
114}
115
116/* Exposed API function to get a functional reference from the implementation
117 * table (ie. try to get a functional reference from the tabled structural
118 * references) for a given digest 'nid' */
119ENGINE *
120ENGINE_get_digest_engine(int nid)
121{
122 return engine_table_select(&digest_table, nid);
123}
124
125/* Obtains a digest implementation from an ENGINE functional reference */
126const EVP_MD *
127ENGINE_get_digest(ENGINE *e, int nid)
128{
129 const EVP_MD *ret;
130 ENGINE_DIGESTS_PTR fn = ENGINE_get_digests(e);
131
132 if (!fn || !fn(e, &ret, NULL, nid)) {
133 ENGINEerror(ENGINE_R_UNIMPLEMENTED_DIGEST);
134 return NULL;
135 }
136 return ret;
137}
138
139/* Gets the digest callback from an ENGINE structure */
140ENGINE_DIGESTS_PTR
141ENGINE_get_digests(const ENGINE *e)
142{
143 return e->digests;
144}
145
146/* Sets the digest callback in an ENGINE structure */
147int
148ENGINE_set_digests(ENGINE *e, ENGINE_DIGESTS_PTR f)
149{
150 e->digests = f;
151 return 1;
152}