]>
Commit | Line | Data |
---|---|---|
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> |
ec577822 | 62 | #include <openssl/rand.h> |
4ead4e52 | 63 | |
0b13e9f0 | 64 | #ifndef OPENSSL_NO_ENGINE |
0f113f3e | 65 | # include <openssl/engine.h> |
0b13e9f0 | 66 | #endif |
dfeab068 | 67 | |
6653c6f2 | 68 | #ifdef OPENSSL_FIPS |
0f113f3e MC |
69 | # include <openssl/fips.h> |
70 | # include <openssl/fips_rand.h> | |
6653c6f2 DSH |
71 | #endif |
72 | ||
0b13e9f0 | 73 | #ifndef OPENSSL_NO_ENGINE |
cb78486d | 74 | /* non-NULL if default_RAND_meth is ENGINE-provided */ |
0f113f3e | 75 | static ENGINE *funct_ref = NULL; |
0b13e9f0 | 76 | #endif |
cb78486d | 77 | static const RAND_METHOD *default_RAND_meth = NULL; |
dfeab068 | 78 | |
cb78486d | 79 | int RAND_set_rand_method(const RAND_METHOD *meth) |
0f113f3e | 80 | { |
0b13e9f0 | 81 | #ifndef OPENSSL_NO_ENGINE |
0f113f3e MC |
82 | if (funct_ref) { |
83 | ENGINE_finish(funct_ref); | |
84 | funct_ref = NULL; | |
85 | } | |
0b13e9f0 | 86 | #endif |
0f113f3e MC |
87 | default_RAND_meth = meth; |
88 | return 1; | |
89 | } | |
dfeab068 | 90 | |
a4a9d97a | 91 | const RAND_METHOD *RAND_get_rand_method(void) |
0f113f3e MC |
92 | { |
93 | if (!default_RAND_meth) { | |
0b13e9f0 | 94 | #ifndef OPENSSL_NO_ENGINE |
0f113f3e MC |
95 | ENGINE *e = ENGINE_get_default_RAND(); |
96 | if (e) { | |
97 | default_RAND_meth = ENGINE_get_RAND(e); | |
98 | if (!default_RAND_meth) { | |
99 | ENGINE_finish(e); | |
100 | e = NULL; | |
101 | } | |
102 | } | |
103 | if (e) | |
104 | funct_ref = e; | |
105 | else | |
0b13e9f0 | 106 | #endif |
b0700d2c | 107 | default_RAND_meth = RAND_OpenSSL(); |
0f113f3e MC |
108 | } |
109 | return default_RAND_meth; | |
110 | } | |
cb78486d | 111 | |
0b13e9f0 | 112 | #ifndef OPENSSL_NO_ENGINE |
cb78486d | 113 | int RAND_set_rand_engine(ENGINE *engine) |
0f113f3e MC |
114 | { |
115 | const RAND_METHOD *tmp_meth = NULL; | |
116 | if (engine) { | |
117 | if (!ENGINE_init(engine)) | |
118 | return 0; | |
119 | tmp_meth = ENGINE_get_RAND(engine); | |
120 | if (!tmp_meth) { | |
121 | ENGINE_finish(engine); | |
122 | return 0; | |
123 | } | |
124 | } | |
125 | /* This function releases any prior ENGINE so call it first */ | |
126 | RAND_set_rand_method(tmp_meth); | |
127 | funct_ref = engine; | |
128 | return 1; | |
129 | } | |
0b13e9f0 | 130 | #endif |
dfeab068 | 131 | |
6b691a5c | 132 | void RAND_cleanup(void) |
0f113f3e MC |
133 | { |
134 | const RAND_METHOD *meth = RAND_get_rand_method(); | |
135 | if (meth && meth->cleanup) | |
136 | meth->cleanup(); | |
137 | RAND_set_rand_method(NULL); | |
138 | } | |
dfeab068 | 139 | |
6343829a | 140 | void RAND_seed(const void *buf, int num) |
0f113f3e MC |
141 | { |
142 | const RAND_METHOD *meth = RAND_get_rand_method(); | |
143 | if (meth && meth->seed) | |
144 | meth->seed(buf, num); | |
145 | } | |
dfeab068 | 146 | |
6343829a | 147 | void RAND_add(const void *buf, int num, double entropy) |
0f113f3e MC |
148 | { |
149 | const RAND_METHOD *meth = RAND_get_rand_method(); | |
150 | if (meth && meth->add) | |
151 | meth->add(buf, num, entropy); | |
152 | } | |
eb952088 | 153 | |
6343829a | 154 | int RAND_bytes(unsigned char *buf, int num) |
0f113f3e MC |
155 | { |
156 | const RAND_METHOD *meth = RAND_get_rand_method(); | |
157 | if (meth && meth->bytes) | |
158 | return meth->bytes(buf, num); | |
159 | return (-1); | |
160 | } | |
dfeab068 | 161 | |
98186eb4 | 162 | #if OPENSSL_API_COMPAT < 0x10100000L |
6343829a | 163 | int RAND_pseudo_bytes(unsigned char *buf, int num) |
0f113f3e MC |
164 | { |
165 | const RAND_METHOD *meth = RAND_get_rand_method(); | |
166 | if (meth && meth->pseudorand) | |
167 | return meth->pseudorand(buf, num); | |
168 | return (-1); | |
169 | } | |
302d38e3 | 170 | #endif |
5eb8ca4d BM |
171 | |
172 | int RAND_status(void) | |
0f113f3e MC |
173 | { |
174 | const RAND_METHOD *meth = RAND_get_rand_method(); | |
175 | if (meth && meth->status) | |
176 | return meth->status(); | |
177 | return 0; | |
178 | } |