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dfeab068 RE |
1 | /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) |
2 | * All rights reserved. | |
3 | * | |
4 | * This package is an SSL implementation written | |
5 | * by Eric Young (eay@cryptsoft.com). | |
6 | * The implementation was written so as to conform with Netscapes SSL. | |
0f113f3e | 7 | * |
dfeab068 RE |
8 | * This library is free for commercial and non-commercial use as long as |
9 | * the following conditions are aheared to. The following conditions | |
10 | * apply to all code found in this distribution, be it the RC4, RSA, | |
11 | * lhash, DES, etc., code; not just the SSL code. The SSL documentation | |
12 | * included with this distribution is covered by the same copyright terms | |
13 | * except that the holder is Tim Hudson (tjh@cryptsoft.com). | |
0f113f3e | 14 | * |
dfeab068 RE |
15 | * Copyright remains Eric Young's, and as such any Copyright notices in |
16 | * the code are not to be removed. | |
17 | * If this package is used in a product, Eric Young should be given attribution | |
18 | * as the author of the parts of the library used. | |
19 | * This can be in the form of a textual message at program startup or | |
20 | * in documentation (online or textual) provided with the package. | |
0f113f3e | 21 | * |
dfeab068 RE |
22 | * Redistribution and use in source and binary forms, with or without |
23 | * modification, are permitted provided that the following conditions | |
24 | * are met: | |
25 | * 1. Redistributions of source code must retain the copyright | |
26 | * notice, this list of conditions and the following disclaimer. | |
27 | * 2. Redistributions in binary form must reproduce the above copyright | |
28 | * notice, this list of conditions and the following disclaimer in the | |
29 | * documentation and/or other materials provided with the distribution. | |
30 | * 3. All advertising materials mentioning features or use of this software | |
31 | * must display the following acknowledgement: | |
32 | * "This product includes cryptographic software written by | |
33 | * Eric Young (eay@cryptsoft.com)" | |
34 | * The word 'cryptographic' can be left out if the rouines from the library | |
35 | * being used are not cryptographic related :-). | |
0f113f3e | 36 | * 4. If you include any Windows specific code (or a derivative thereof) from |
dfeab068 RE |
37 | * the apps directory (application code) you must include an acknowledgement: |
38 | * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" | |
0f113f3e | 39 | * |
dfeab068 RE |
40 | * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND |
41 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
42 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
43 | * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE | |
44 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
45 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
46 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
47 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |
48 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |
49 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |
50 | * SUCH DAMAGE. | |
0f113f3e | 51 | * |
dfeab068 RE |
52 | * The licence and distribution terms for any publically available version or |
53 | * derivative of this code cannot be changed. i.e. this code cannot simply be | |
54 | * copied and put under another distribution licence | |
55 | * [including the GNU Public Licence.] | |
56 | */ | |
57 | ||
58 | #include <stdio.h> | |
dfeab068 | 59 | #include <time.h> |
b39fc560 | 60 | #include "internal/cryptlib.h" |
98186eb4 | 61 | #include <openssl/opensslconf.h> |
f3cd81d6 | 62 | #include "internal/rand.h" |
4ead4e52 | 63 | |
3c27208f | 64 | #include <openssl/engine.h> |
dfeab068 | 65 | |
6653c6f2 | 66 | #ifdef OPENSSL_FIPS |
0f113f3e MC |
67 | # include <openssl/fips.h> |
68 | # include <openssl/fips_rand.h> | |
6653c6f2 DSH |
69 | #endif |
70 | ||
0b13e9f0 | 71 | #ifndef OPENSSL_NO_ENGINE |
cb78486d | 72 | /* non-NULL if default_RAND_meth is ENGINE-provided */ |
0f113f3e | 73 | static ENGINE *funct_ref = NULL; |
0b13e9f0 | 74 | #endif |
cb78486d | 75 | static const RAND_METHOD *default_RAND_meth = NULL; |
dfeab068 | 76 | |
cb78486d | 77 | int RAND_set_rand_method(const RAND_METHOD *meth) |
0f113f3e | 78 | { |
0b13e9f0 | 79 | #ifndef OPENSSL_NO_ENGINE |
7c96dbcd RS |
80 | ENGINE_finish(funct_ref); |
81 | funct_ref = NULL; | |
0b13e9f0 | 82 | #endif |
0f113f3e MC |
83 | default_RAND_meth = meth; |
84 | return 1; | |
85 | } | |
dfeab068 | 86 | |
a4a9d97a | 87 | const RAND_METHOD *RAND_get_rand_method(void) |
0f113f3e MC |
88 | { |
89 | if (!default_RAND_meth) { | |
0b13e9f0 | 90 | #ifndef OPENSSL_NO_ENGINE |
0f113f3e MC |
91 | ENGINE *e = ENGINE_get_default_RAND(); |
92 | if (e) { | |
93 | default_RAND_meth = ENGINE_get_RAND(e); | |
7c96dbcd | 94 | if (default_RAND_meth == NULL) { |
0f113f3e MC |
95 | ENGINE_finish(e); |
96 | e = NULL; | |
97 | } | |
98 | } | |
99 | if (e) | |
100 | funct_ref = e; | |
101 | else | |
0b13e9f0 | 102 | #endif |
b0700d2c | 103 | default_RAND_meth = RAND_OpenSSL(); |
0f113f3e MC |
104 | } |
105 | return default_RAND_meth; | |
106 | } | |
cb78486d | 107 | |
0b13e9f0 | 108 | #ifndef OPENSSL_NO_ENGINE |
cb78486d | 109 | int RAND_set_rand_engine(ENGINE *engine) |
0f113f3e MC |
110 | { |
111 | const RAND_METHOD *tmp_meth = NULL; | |
112 | if (engine) { | |
113 | if (!ENGINE_init(engine)) | |
114 | return 0; | |
115 | tmp_meth = ENGINE_get_RAND(engine); | |
7c96dbcd | 116 | if (tmp_meth == NULL) { |
0f113f3e MC |
117 | ENGINE_finish(engine); |
118 | return 0; | |
119 | } | |
120 | } | |
121 | /* This function releases any prior ENGINE so call it first */ | |
122 | RAND_set_rand_method(tmp_meth); | |
123 | funct_ref = engine; | |
124 | return 1; | |
125 | } | |
0b13e9f0 | 126 | #endif |
dfeab068 | 127 | |
342c21cd | 128 | void int_rand_cleanup(void) |
0f113f3e MC |
129 | { |
130 | const RAND_METHOD *meth = RAND_get_rand_method(); | |
131 | if (meth && meth->cleanup) | |
132 | meth->cleanup(); | |
133 | RAND_set_rand_method(NULL); | |
134 | } | |
dfeab068 | 135 | |
6343829a | 136 | void RAND_seed(const void *buf, int num) |
0f113f3e MC |
137 | { |
138 | const RAND_METHOD *meth = RAND_get_rand_method(); | |
139 | if (meth && meth->seed) | |
140 | meth->seed(buf, num); | |
141 | } | |
dfeab068 | 142 | |
6343829a | 143 | void RAND_add(const void *buf, int num, double entropy) |
0f113f3e MC |
144 | { |
145 | const RAND_METHOD *meth = RAND_get_rand_method(); | |
146 | if (meth && meth->add) | |
147 | meth->add(buf, num, entropy); | |
148 | } | |
eb952088 | 149 | |
6343829a | 150 | int RAND_bytes(unsigned char *buf, int num) |
0f113f3e MC |
151 | { |
152 | const RAND_METHOD *meth = RAND_get_rand_method(); | |
153 | if (meth && meth->bytes) | |
154 | return meth->bytes(buf, num); | |
155 | return (-1); | |
156 | } | |
dfeab068 | 157 | |
98186eb4 | 158 | #if OPENSSL_API_COMPAT < 0x10100000L |
6343829a | 159 | int RAND_pseudo_bytes(unsigned char *buf, int num) |
0f113f3e MC |
160 | { |
161 | const RAND_METHOD *meth = RAND_get_rand_method(); | |
162 | if (meth && meth->pseudorand) | |
163 | return meth->pseudorand(buf, num); | |
164 | return (-1); | |
165 | } | |
302d38e3 | 166 | #endif |
5eb8ca4d BM |
167 | |
168 | int RAND_status(void) | |
0f113f3e MC |
169 | { |
170 | const RAND_METHOD *meth = RAND_get_rand_method(); | |
171 | if (meth && meth->status) | |
172 | return meth->status(); | |
173 | return 0; | |
174 | } |