Branch data 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 : : /* If this symbol is defined then ENGINE_get_default_DH(), the function that is
58 : : * used by DH to hook in implementation code and cache defaults (etc), will
59 : : * display brief debugging summaries to stderr with the 'nid'. */
60 : : /* #define ENGINE_DH_DEBUG */
61 : :
62 : : static ENGINE_TABLE *dh_table = NULL;
63 : : static const int dummy_nid = 1;
64 : :
65 : 0 : void ENGINE_unregister_DH(ENGINE *e)
66 : : {
67 : 0 : engine_table_unregister(&dh_table, e);
68 : 0 : }
69 : :
70 : 727 : static void engine_unregister_all_DH(void)
71 : : {
72 : 727 : engine_table_cleanup(&dh_table);
73 : 727 : }
74 : :
75 : 8008 : int ENGINE_register_DH(ENGINE *e)
76 : : {
77 [ + + ]: 8008 : if(e->dh_meth)
78 : 5096 : return engine_table_register(&dh_table,
79 : : engine_unregister_all_DH, e, &dummy_nid, 1, 0);
80 : : return 1;
81 : : }
82 : :
83 : 0 : void ENGINE_register_all_DH()
84 : : {
85 : : ENGINE *e;
86 : :
87 [ # # ]: 0 : for(e=ENGINE_get_first() ; e ; e=ENGINE_get_next(e))
88 : 0 : ENGINE_register_DH(e);
89 : 0 : }
90 : :
91 : 1 : int ENGINE_set_default_DH(ENGINE *e)
92 : : {
93 [ - + ]: 1 : if(e->dh_meth)
94 : 0 : return engine_table_register(&dh_table,
95 : : engine_unregister_all_DH, e, &dummy_nid, 1, 1);
96 : : return 1;
97 : : }
98 : :
99 : : /* Exposed API function to get a functional reference from the implementation
100 : : * table (ie. try to get a functional reference from the tabled structural
101 : : * references). */
102 : 2955 : ENGINE *ENGINE_get_default_DH(void)
103 : : {
104 : 2955 : return engine_table_select(&dh_table, dummy_nid);
105 : : }
106 : :
107 : : /* Obtains an DH implementation from an ENGINE functional reference */
108 : 0 : const DH_METHOD *ENGINE_get_DH(const ENGINE *e)
109 : : {
110 : 0 : return e->dh_meth;
111 : : }
112 : :
113 : : /* Sets an DH implementation in an ENGINE structure */
114 : 5096 : int ENGINE_set_DH(ENGINE *e, const DH_METHOD *dh_meth)
115 : : {
116 : 5096 : e->dh_meth = dh_meth;
117 : 5096 : return 1;
118 : : }
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