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rand.h
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1 /* crypto/rand/rand.h */
2 /* Copyright (C) 1995-1998 Eric Young ([email protected])
3  * All rights reserved.
4  *
5  * This package is an SSL implementation written
6  * by Eric Young ([email protected]).
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 ([email protected]).
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 ([email protected])"
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 ([email protected])"
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
71 extern "C" {
72 #endif
73 
74 #if defined(OPENSSL_FIPS)
75 #define FIPS_RAND_SIZE_T size_t
76 #endif
77 
78 /* Already defined in ossl_typ.h */
79 /* typedef struct rand_meth_st RAND_METHOD; */
80 
81 struct rand_meth_st
82  {
83  void (*seed)(const void *buf, int num);
84  int (*bytes)(unsigned char *buf, int num);
85  void (*cleanup)(void);
86  void (*add)(const void *buf, int num, double entropy);
87  int (*pseudorand)(unsigned char *buf, int num);
88  int (*status)(void);
89  };
90 
91 #ifdef BN_DEBUG
92 extern int rand_predictable;
93 #endif
94 
95 int RAND_set_rand_method(const RAND_METHOD *meth);
97 #ifndef OPENSSL_NO_ENGINE
98 int RAND_set_rand_engine(ENGINE *engine);
99 #endif
100 RAND_METHOD *RAND_SSLeay(void);
101 void RAND_cleanup(void );
102 int RAND_bytes(unsigned char *buf,int num);
103 int RAND_pseudo_bytes(unsigned char *buf,int num);
104 void RAND_seed(const void *buf,int num);
105 void RAND_add(const void *buf,int num,double entropy);
106 int RAND_load_file(const char *file,long max_bytes);
107 int RAND_write_file(const char *file);
108 const char *RAND_file_name(char *file,size_t num);
109 int RAND_status(void);
110 int RAND_query_egd_bytes(const char *path, unsigned char *buf, int bytes);
111 int RAND_egd(const char *path);
112 int RAND_egd_bytes(const char *path,int bytes);
113 int RAND_poll(void);
114 
115 #if defined(OPENSSL_SYS_WINDOWS) || defined(OPENSSL_SYS_WIN32)
116 
117 void RAND_screen(void);
118 int RAND_event(UINT, WPARAM, LPARAM);
119 
120 #endif
121 
122 #ifdef OPENSSL_FIPS
123 void RAND_set_fips_drbg_type(int type, int flags);
124 int RAND_init_fips(void);
125 #endif
126 
127 /* BEGIN ERROR CODES */
128 /* The following lines are auto generated by the script mkerr.pl. Any changes
129  * made after this point may be overwritten when the script is next run.
130  */
131 void ERR_load_RAND_strings(void);
132 
133 /* Error codes for the RAND functions. */
134 
135 /* Function codes. */
136 #define RAND_F_RAND_GET_RAND_METHOD 101
137 #define RAND_F_RAND_INIT_FIPS 102
138 #define RAND_F_SSLEAY_RAND_BYTES 100
139 
140 /* Reason codes. */
141 #define RAND_R_ERROR_INITIALISING_DRBG 102
142 #define RAND_R_ERROR_INSTANTIATING_DRBG 103
143 #define RAND_R_NO_FIPS_RANDOM_METHOD_SET 101
144 #define RAND_R_PRNG_NOT_SEEDED 100
145 
146 #ifdef __cplusplus
147 }
148 #endif
149 #endif