1*0Sstevel@tonic-gate /* crypto/rand/rand_lib.c */
2*0Sstevel@tonic-gate /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
3*0Sstevel@tonic-gate * All rights reserved.
4*0Sstevel@tonic-gate *
5*0Sstevel@tonic-gate * This package is an SSL implementation written
6*0Sstevel@tonic-gate * by Eric Young (eay@cryptsoft.com).
7*0Sstevel@tonic-gate * The implementation was written so as to conform with Netscapes SSL.
8*0Sstevel@tonic-gate *
9*0Sstevel@tonic-gate * This library is free for commercial and non-commercial use as long as
10*0Sstevel@tonic-gate * the following conditions are aheared to. The following conditions
11*0Sstevel@tonic-gate * apply to all code found in this distribution, be it the RC4, RSA,
12*0Sstevel@tonic-gate * lhash, DES, etc., code; not just the SSL code. The SSL documentation
13*0Sstevel@tonic-gate * included with this distribution is covered by the same copyright terms
14*0Sstevel@tonic-gate * except that the holder is Tim Hudson (tjh@cryptsoft.com).
15*0Sstevel@tonic-gate *
16*0Sstevel@tonic-gate * Copyright remains Eric Young's, and as such any Copyright notices in
17*0Sstevel@tonic-gate * the code are not to be removed.
18*0Sstevel@tonic-gate * If this package is used in a product, Eric Young should be given attribution
19*0Sstevel@tonic-gate * as the author of the parts of the library used.
20*0Sstevel@tonic-gate * This can be in the form of a textual message at program startup or
21*0Sstevel@tonic-gate * in documentation (online or textual) provided with the package.
22*0Sstevel@tonic-gate *
23*0Sstevel@tonic-gate * Redistribution and use in source and binary forms, with or without
24*0Sstevel@tonic-gate * modification, are permitted provided that the following conditions
25*0Sstevel@tonic-gate * are met:
26*0Sstevel@tonic-gate * 1. Redistributions of source code must retain the copyright
27*0Sstevel@tonic-gate * notice, this list of conditions and the following disclaimer.
28*0Sstevel@tonic-gate * 2. Redistributions in binary form must reproduce the above copyright
29*0Sstevel@tonic-gate * notice, this list of conditions and the following disclaimer in the
30*0Sstevel@tonic-gate * documentation and/or other materials provided with the distribution.
31*0Sstevel@tonic-gate * 3. All advertising materials mentioning features or use of this software
32*0Sstevel@tonic-gate * must display the following acknowledgement:
33*0Sstevel@tonic-gate * "This product includes cryptographic software written by
34*0Sstevel@tonic-gate * Eric Young (eay@cryptsoft.com)"
35*0Sstevel@tonic-gate * The word 'cryptographic' can be left out if the rouines from the library
36*0Sstevel@tonic-gate * being used are not cryptographic related :-).
37*0Sstevel@tonic-gate * 4. If you include any Windows specific code (or a derivative thereof) from
38*0Sstevel@tonic-gate * the apps directory (application code) you must include an acknowledgement:
39*0Sstevel@tonic-gate * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
40*0Sstevel@tonic-gate *
41*0Sstevel@tonic-gate * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
42*0Sstevel@tonic-gate * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
43*0Sstevel@tonic-gate * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
44*0Sstevel@tonic-gate * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
45*0Sstevel@tonic-gate * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
46*0Sstevel@tonic-gate * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
47*0Sstevel@tonic-gate * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48*0Sstevel@tonic-gate * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
49*0Sstevel@tonic-gate * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
50*0Sstevel@tonic-gate * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
51*0Sstevel@tonic-gate * SUCH DAMAGE.
52*0Sstevel@tonic-gate *
53*0Sstevel@tonic-gate * The licence and distribution terms for any publically available version or
54*0Sstevel@tonic-gate * derivative of this code cannot be changed. i.e. this code cannot simply be
55*0Sstevel@tonic-gate * copied and put under another distribution licence
56*0Sstevel@tonic-gate * [including the GNU Public Licence.]
57*0Sstevel@tonic-gate */
58*0Sstevel@tonic-gate
59*0Sstevel@tonic-gate #include <stdio.h>
60*0Sstevel@tonic-gate #include <time.h>
61*0Sstevel@tonic-gate #include "cryptlib.h"
62*0Sstevel@tonic-gate #include <openssl/rand.h>
63*0Sstevel@tonic-gate #ifndef OPENSSL_NO_ENGINE
64*0Sstevel@tonic-gate #include <openssl/engine.h>
65*0Sstevel@tonic-gate #endif
66*0Sstevel@tonic-gate
67*0Sstevel@tonic-gate #ifndef OPENSSL_NO_ENGINE
68*0Sstevel@tonic-gate /* non-NULL if default_RAND_meth is ENGINE-provided */
69*0Sstevel@tonic-gate static ENGINE *funct_ref =NULL;
70*0Sstevel@tonic-gate #endif
71*0Sstevel@tonic-gate static const RAND_METHOD *default_RAND_meth = NULL;
72*0Sstevel@tonic-gate
RAND_set_rand_method(const RAND_METHOD * meth)73*0Sstevel@tonic-gate int RAND_set_rand_method(const RAND_METHOD *meth)
74*0Sstevel@tonic-gate {
75*0Sstevel@tonic-gate #ifndef OPENSSL_NO_ENGINE
76*0Sstevel@tonic-gate if(funct_ref)
77*0Sstevel@tonic-gate {
78*0Sstevel@tonic-gate ENGINE_finish(funct_ref);
79*0Sstevel@tonic-gate funct_ref = NULL;
80*0Sstevel@tonic-gate }
81*0Sstevel@tonic-gate #endif
82*0Sstevel@tonic-gate default_RAND_meth = meth;
83*0Sstevel@tonic-gate return 1;
84*0Sstevel@tonic-gate }
85*0Sstevel@tonic-gate
RAND_get_rand_method(void)86*0Sstevel@tonic-gate const RAND_METHOD *RAND_get_rand_method(void)
87*0Sstevel@tonic-gate {
88*0Sstevel@tonic-gate if (!default_RAND_meth)
89*0Sstevel@tonic-gate {
90*0Sstevel@tonic-gate #ifndef OPENSSL_NO_ENGINE
91*0Sstevel@tonic-gate ENGINE *e = ENGINE_get_default_RAND();
92*0Sstevel@tonic-gate if(e)
93*0Sstevel@tonic-gate {
94*0Sstevel@tonic-gate default_RAND_meth = ENGINE_get_RAND(e);
95*0Sstevel@tonic-gate if(!default_RAND_meth)
96*0Sstevel@tonic-gate {
97*0Sstevel@tonic-gate ENGINE_finish(e);
98*0Sstevel@tonic-gate e = NULL;
99*0Sstevel@tonic-gate }
100*0Sstevel@tonic-gate }
101*0Sstevel@tonic-gate if(e)
102*0Sstevel@tonic-gate funct_ref = e;
103*0Sstevel@tonic-gate else
104*0Sstevel@tonic-gate #endif
105*0Sstevel@tonic-gate default_RAND_meth = RAND_SSLeay();
106*0Sstevel@tonic-gate }
107*0Sstevel@tonic-gate return default_RAND_meth;
108*0Sstevel@tonic-gate }
109*0Sstevel@tonic-gate
110*0Sstevel@tonic-gate #ifndef OPENSSL_NO_ENGINE
RAND_set_rand_engine(ENGINE * engine)111*0Sstevel@tonic-gate int RAND_set_rand_engine(ENGINE *engine)
112*0Sstevel@tonic-gate {
113*0Sstevel@tonic-gate const RAND_METHOD *tmp_meth = NULL;
114*0Sstevel@tonic-gate if(engine)
115*0Sstevel@tonic-gate {
116*0Sstevel@tonic-gate if(!ENGINE_init(engine))
117*0Sstevel@tonic-gate return 0;
118*0Sstevel@tonic-gate tmp_meth = ENGINE_get_RAND(engine);
119*0Sstevel@tonic-gate if(!tmp_meth)
120*0Sstevel@tonic-gate {
121*0Sstevel@tonic-gate ENGINE_finish(engine);
122*0Sstevel@tonic-gate return 0;
123*0Sstevel@tonic-gate }
124*0Sstevel@tonic-gate }
125*0Sstevel@tonic-gate /* This function releases any prior ENGINE so call it first */
126*0Sstevel@tonic-gate RAND_set_rand_method(tmp_meth);
127*0Sstevel@tonic-gate funct_ref = engine;
128*0Sstevel@tonic-gate return 1;
129*0Sstevel@tonic-gate }
130*0Sstevel@tonic-gate #endif
131*0Sstevel@tonic-gate
RAND_cleanup(void)132*0Sstevel@tonic-gate void RAND_cleanup(void)
133*0Sstevel@tonic-gate {
134*0Sstevel@tonic-gate const RAND_METHOD *meth = RAND_get_rand_method();
135*0Sstevel@tonic-gate if (meth && meth->cleanup)
136*0Sstevel@tonic-gate meth->cleanup();
137*0Sstevel@tonic-gate RAND_set_rand_method(NULL);
138*0Sstevel@tonic-gate }
139*0Sstevel@tonic-gate
RAND_seed(const void * buf,int num)140*0Sstevel@tonic-gate void RAND_seed(const void *buf, int num)
141*0Sstevel@tonic-gate {
142*0Sstevel@tonic-gate const RAND_METHOD *meth = RAND_get_rand_method();
143*0Sstevel@tonic-gate if (meth && meth->seed)
144*0Sstevel@tonic-gate meth->seed(buf,num);
145*0Sstevel@tonic-gate }
146*0Sstevel@tonic-gate
RAND_add(const void * buf,int num,double entropy)147*0Sstevel@tonic-gate void RAND_add(const void *buf, int num, double entropy)
148*0Sstevel@tonic-gate {
149*0Sstevel@tonic-gate const RAND_METHOD *meth = RAND_get_rand_method();
150*0Sstevel@tonic-gate if (meth && meth->add)
151*0Sstevel@tonic-gate meth->add(buf,num,entropy);
152*0Sstevel@tonic-gate }
153*0Sstevel@tonic-gate
RAND_bytes(unsigned char * buf,int num)154*0Sstevel@tonic-gate int RAND_bytes(unsigned char *buf, int num)
155*0Sstevel@tonic-gate {
156*0Sstevel@tonic-gate const RAND_METHOD *meth = RAND_get_rand_method();
157*0Sstevel@tonic-gate if (meth && meth->bytes)
158*0Sstevel@tonic-gate return meth->bytes(buf,num);
159*0Sstevel@tonic-gate return(-1);
160*0Sstevel@tonic-gate }
161*0Sstevel@tonic-gate
RAND_pseudo_bytes(unsigned char * buf,int num)162*0Sstevel@tonic-gate int RAND_pseudo_bytes(unsigned char *buf, int num)
163*0Sstevel@tonic-gate {
164*0Sstevel@tonic-gate const RAND_METHOD *meth = RAND_get_rand_method();
165*0Sstevel@tonic-gate if (meth && meth->pseudorand)
166*0Sstevel@tonic-gate return meth->pseudorand(buf,num);
167*0Sstevel@tonic-gate return(-1);
168*0Sstevel@tonic-gate }
169*0Sstevel@tonic-gate
RAND_status(void)170*0Sstevel@tonic-gate int RAND_status(void)
171*0Sstevel@tonic-gate {
172*0Sstevel@tonic-gate const RAND_METHOD *meth = RAND_get_rand_method();
173*0Sstevel@tonic-gate if (meth && meth->status)
174*0Sstevel@tonic-gate return meth->status();
175*0Sstevel@tonic-gate return 0;
176*0Sstevel@tonic-gate }
177