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354c3ace | 1 | /* ==================================================================== |
b6d1e52d | 2 | * Copyright (c) 2000 The OpenSSL Project. All rights reserved. |
354c3ace BL |
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 | |
ae5c8664 | 9 | * notice, this list of conditions and the following disclaimer. |
354c3ace BL |
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 | ||
14cfde9c | 55 | #include "eng_int.h" |
354c3ace | 56 | |
ae5c8664 MC |
57 | /* |
58 | * If this symbol is defined then ENGINE_get_default_RAND(), the function | |
59 | * that is used by RAND to hook in implementation code and cache defaults | |
60 | * (etc), will display brief debugging summaries to stderr with the 'nid'. | |
61 | */ | |
b6d1e52d | 62 | /* #define ENGINE_RAND_DEBUG */ |
354c3ace | 63 | |
b6d1e52d GT |
64 | static ENGINE_TABLE *rand_table = NULL; |
65 | static const int dummy_nid = 1; | |
354c3ace | 66 | |
b6d1e52d | 67 | void ENGINE_unregister_RAND(ENGINE *e) |
ae5c8664 MC |
68 | { |
69 | engine_table_unregister(&rand_table, e); | |
70 | } | |
354c3ace | 71 | |
6d52f260 | 72 | static void engine_unregister_all_RAND(void) |
ae5c8664 MC |
73 | { |
74 | engine_table_cleanup(&rand_table); | |
75 | } | |
354c3ace | 76 | |
b6d1e52d | 77 | int ENGINE_register_RAND(ENGINE *e) |
ae5c8664 MC |
78 | { |
79 | if (e->rand_meth) | |
80 | return engine_table_register(&rand_table, | |
81 | engine_unregister_all_RAND, e, | |
82 | &dummy_nid, 1, 0); | |
83 | return 1; | |
84 | } | |
354c3ace | 85 | |
b6d1e52d | 86 | void ENGINE_register_all_RAND() |
ae5c8664 MC |
87 | { |
88 | ENGINE *e; | |
354c3ace | 89 | |
ae5c8664 MC |
90 | for (e = ENGINE_get_first(); e; e = ENGINE_get_next(e)) |
91 | ENGINE_register_RAND(e); | |
92 | } | |
354c3ace | 93 | |
b6d1e52d | 94 | int ENGINE_set_default_RAND(ENGINE *e) |
ae5c8664 MC |
95 | { |
96 | if (e->rand_meth) | |
97 | return engine_table_register(&rand_table, | |
98 | engine_unregister_all_RAND, e, | |
99 | &dummy_nid, 1, 1); | |
100 | return 1; | |
101 | } | |
0e360199 | 102 | |
ae5c8664 MC |
103 | /* |
104 | * Exposed API function to get a functional reference from the implementation | |
b6d1e52d | 105 | * table (ie. try to get a functional reference from the tabled structural |
ae5c8664 MC |
106 | * references). |
107 | */ | |
b6d1e52d | 108 | ENGINE *ENGINE_get_default_RAND(void) |
ae5c8664 MC |
109 | { |
110 | return engine_table_select(&rand_table, dummy_nid); | |
111 | } | |
0e360199 | 112 | |
b6d1e52d GT |
113 | /* Obtains an RAND implementation from an ENGINE functional reference */ |
114 | const RAND_METHOD *ENGINE_get_RAND(const ENGINE *e) | |
ae5c8664 MC |
115 | { |
116 | return e->rand_meth; | |
117 | } | |
0e360199 | 118 | |
b6d1e52d GT |
119 | /* Sets an RAND implementation in an ENGINE structure */ |
120 | int ENGINE_set_RAND(ENGINE *e, const RAND_METHOD *rand_meth) | |
ae5c8664 MC |
121 | { |
122 | e->rand_meth = rand_meth; | |
123 | return 1; | |
124 | } |