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dfeab068 RE |
1 | /* crypto/rand/rand_lib.c */ |
2 | /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) | |
3 | * All rights reserved. | |
4 | * | |
5 | * This package is an SSL implementation written | |
6 | * by Eric Young (eay@cryptsoft.com). | |
7 | * The implementation was written so as to conform with Netscapes SSL. | |
8 | * | |
9 | * This library is free for commercial and non-commercial use as long as | |
10 | * the following conditions are aheared to. The following conditions | |
11 | * apply to all code found in this distribution, be it the RC4, RSA, | |
12 | * lhash, DES, etc., code; not just the SSL code. The SSL documentation | |
13 | * included with this distribution is covered by the same copyright terms | |
14 | * except that the holder is Tim Hudson (tjh@cryptsoft.com). | |
15 | * | |
16 | * Copyright remains Eric Young's, and as such any Copyright notices in | |
17 | * the code are not to be removed. | |
18 | * If this package is used in a product, Eric Young should be given attribution | |
19 | * as the author of the parts of the library used. | |
20 | * This can be in the form of a textual message at program startup or | |
21 | * in documentation (online or textual) provided with the package. | |
22 | * | |
23 | * Redistribution and use in source and binary forms, with or without | |
24 | * modification, are permitted provided that the following conditions | |
25 | * are met: | |
26 | * 1. Redistributions of source code must retain the copyright | |
27 | * notice, this list of conditions and the following disclaimer. | |
28 | * 2. Redistributions in binary form must reproduce the above copyright | |
29 | * notice, this list of conditions and the following disclaimer in the | |
30 | * documentation and/or other materials provided with the distribution. | |
31 | * 3. All advertising materials mentioning features or use of this software | |
32 | * must display the following acknowledgement: | |
33 | * "This product includes cryptographic software written by | |
34 | * Eric Young (eay@cryptsoft.com)" | |
35 | * The word 'cryptographic' can be left out if the rouines from the library | |
36 | * being used are not cryptographic related :-). | |
37 | * 4. If you include any Windows specific code (or a derivative thereof) from | |
38 | * the apps directory (application code) you must include an acknowledgement: | |
39 | * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" | |
40 | * | |
41 | * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND | |
42 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
43 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
44 | * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE | |
45 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
46 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
47 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
48 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |
49 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |
50 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |
51 | * SUCH DAMAGE. | |
52 | * | |
53 | * The licence and distribution terms for any publically available version or | |
54 | * derivative of this code cannot be changed. i.e. this code cannot simply be | |
55 | * copied and put under another distribution licence | |
56 | * [including the GNU Public Licence.] | |
57 | */ | |
58 | ||
59 | #include <stdio.h> | |
dfeab068 | 60 | #include <time.h> |
ec577822 | 61 | #include <openssl/rand.h> |
dfeab068 RE |
62 | |
63 | #ifdef NO_RAND | |
64 | static RAND_METHOD *rand_meth=NULL; | |
65 | #else | |
651d0aff RE |
66 | extern RAND_METHOD rand_ssleay_meth; |
67 | static RAND_METHOD *rand_meth= &rand_ssleay_meth; | |
dfeab068 RE |
68 | #endif |
69 | ||
6b691a5c | 70 | void RAND_set_rand_method(RAND_METHOD *meth) |
dfeab068 RE |
71 | { |
72 | rand_meth=meth; | |
73 | } | |
74 | ||
6b691a5c | 75 | RAND_METHOD *RAND_get_rand_method(void) |
dfeab068 RE |
76 | { |
77 | return(rand_meth); | |
78 | } | |
79 | ||
6b691a5c | 80 | void RAND_cleanup(void) |
dfeab068 RE |
81 | { |
82 | if (rand_meth != NULL) | |
83 | rand_meth->cleanup(); | |
84 | } | |
85 | ||
6b691a5c | 86 | void RAND_seed(const void *buf, int num) |
dfeab068 RE |
87 | { |
88 | if (rand_meth != NULL) | |
89 | rand_meth->seed(buf,num); | |
90 | } | |
91 | ||
853f757e | 92 | void RAND_add(const void *buf, int num, double entropy) |
dfeab068 RE |
93 | { |
94 | if (rand_meth != NULL) | |
eb952088 UM |
95 | rand_meth->add(buf,num,entropy); |
96 | } | |
97 | ||
98 | int RAND_bytes(unsigned char *buf, int num) | |
99 | { | |
100 | if (rand_meth != NULL) | |
101 | return rand_meth->bytes(buf,num); | |
102 | return(-1); | |
dfeab068 RE |
103 | } |
104 | ||
373b575f UM |
105 | int RAND_pseudo_bytes(unsigned char *buf, int num) |
106 | { | |
107 | if (rand_meth != NULL) | |
108 | return rand_meth->pseudorand(buf,num); | |
109 | return(-1); | |
110 | } |