rand.h revision 296465 
1/* crypto/rand/rand.h */
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#ifndef HEADER_RAND_H
60# define HEADER_RAND_H
61
62# include <stdlib.h>
63# include <openssl/ossl_typ.h>
64# include <openssl/e_os2.h>
65
66# if defined(OPENSSL_SYS_WINDOWS)
67#  include <windows.h>
68# endif
69
70#ifdef  __cplusplus
71extern "C" {
72#endif
73
74# if defined(OPENSSL_FIPS)
75#  define FIPS_RAND_SIZE_T int
76# endif
77
78/* Already defined in ossl_typ.h */
79/* typedef struct rand_meth_st RAND_METHOD; */
80
81struct rand_meth_st {
82    void (*seed) (const void *buf, int num);
83    int (*bytes) (unsigned char *buf, int num);
84    void (*cleanup) (void);
85    void (*add) (const void *buf, int num, double entropy);
86    int (*pseudorand) (unsigned char *buf, int num);
87    int (*status) (void);
88};
89
90# ifdef BN_DEBUG
91extern int rand_predictable;
92# endif
93
94int RAND_set_rand_method(const RAND_METHOD *meth);
95const RAND_METHOD *RAND_get_rand_method(void);
96# ifndef OPENSSL_NO_ENGINE
97int RAND_set_rand_engine(ENGINE *engine);
98# endif
99RAND_METHOD *RAND_SSLeay(void);
100void RAND_cleanup(void);
101int RAND_bytes(unsigned char *buf, int num);
102int RAND_pseudo_bytes(unsigned char *buf, int num);
103void RAND_seed(const void *buf, int num);
104void RAND_add(const void *buf, int num, double entropy);
105int RAND_load_file(const char *file, long max_bytes);
106int RAND_write_file(const char *file);
107const char *RAND_file_name(char *file, size_t num);
108int RAND_status(void);
109int RAND_query_egd_bytes(const char *path, unsigned char *buf, int bytes);
110int RAND_egd(const char *path);
111int RAND_egd_bytes(const char *path, int bytes);
112int RAND_poll(void);
113# ifndef OPENSSL_NO_ENGINE
114#  ifdef OPENSSL_FIPS
115void int_RAND_init_engine_callbacks(void);
116void int_RAND_set_callbacks(int (*set_rand_func) (const RAND_METHOD *meth,
117                                                  const RAND_METHOD **pmeth),
118                            const RAND_METHOD *(*get_rand_func) (const
119                                                                 RAND_METHOD
120                                                                 **pmeth));
121#  endif
122# endif
123
124# if defined(OPENSSL_SYS_WINDOWS) || defined(OPENSSL_SYS_WIN32)
125
126void RAND_screen(void);
127int RAND_event(UINT, WPARAM, LPARAM);
128
129# endif
130
131/* BEGIN ERROR CODES */
132/*
133 * The following lines are auto generated by the script mkerr.pl. Any changes
134 * made after this point may be overwritten when the script is next run.
135 */
136void ERR_load_RAND_strings(void);
137
138/* Error codes for the RAND functions. */
139
140/* Function codes. */
141# define RAND_F_ENG_RAND_GET_RAND_METHOD                  108
142# define RAND_F_FIPS_RAND                                 103
143# define RAND_F_FIPS_RAND_BYTES                           102
144# define RAND_F_FIPS_RAND_GET_RAND_METHOD                 109
145# define RAND_F_FIPS_RAND_SET_DT                          106
146# define RAND_F_FIPS_SET_DT                               104
147# define RAND_F_FIPS_SET_PRNG_SEED                        107
148# define RAND_F_FIPS_SET_TEST_MODE                        105
149# define RAND_F_RAND_GET_RAND_METHOD                      101
150# define RAND_F_SSLEAY_RAND_BYTES                         100
151
152/* Reason codes. */
153# define RAND_R_NON_FIPS_METHOD                           105
154# define RAND_R_NOT_IN_TEST_MODE                          106
155# define RAND_R_NO_KEY_SET                                107
156# define RAND_R_PRNG_ASKING_FOR_TOO_MUCH                  101
157# define RAND_R_PRNG_ERROR                                108
158# define RAND_R_PRNG_KEYED                                109
159# define RAND_R_PRNG_NOT_REKEYED                          102
160# define RAND_R_PRNG_NOT_RESEEDED                         103
161# define RAND_R_PRNG_NOT_SEEDED                           100
162# define RAND_R_PRNG_SEED_MUST_NOT_MATCH_KEY              110
163# define RAND_R_PRNG_STUCK                                104
164
165#ifdef  __cplusplus
166}
167#endif
168#endif
169