include/openssl/rand.h

   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
  71 extern "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
  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);
  96 const RAND_METHOD *RAND_get_rand_method(void);
  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 #ifndef OPENSSL_NO_ENGINE
 115 #ifdef OPENSSL_FIPS
 116 void int_RAND_init_engine_callbacks(void);
 117 void int_RAND_set_callbacks(
 118         int (*set_rand_func)(const RAND_METHOD *meth,
 119                                                 const RAND_METHOD **pmeth),
 120         const RAND_METHOD *(*get_rand_func)(const RAND_METHOD **pmeth));
 121 #endif
 122 #endif
 123
 124 #if defined(OPENSSL_SYS_WINDOWS) || defined(OPENSSL_SYS_WIN32)
 125
 126 void RAND_screen(void);
 127 int RAND_event(UINT, WPARAM, LPARAM);
 128
 129 #endif
 130
 131 /* BEGIN ERROR CODES */
 132 /* The following lines are auto generated by the script mkerr.pl. Any changes
 133  * made after this point may be overwritten when the script is next run.
 134  */
 135 void ERR_load_RAND_strings(void);
 136
 137 /* Error codes for the RAND functions. */
 138
 139 /* Function codes. */
 140 #define RAND_F_ENG_RAND_GET_RAND_METHOD                  108
 141 #define RAND_F_FIPS_RAND                                 103
 142 #define RAND_F_FIPS_RAND_BYTES                           102
 143 #define RAND_F_FIPS_RAND_GET_RAND_METHOD                 109
 144 #define RAND_F_FIPS_RAND_SET_DT                          106
 145 #define RAND_F_FIPS_SET_DT                               104
 146 #define RAND_F_FIPS_SET_PRNG_SEED                        107
 147 #define RAND_F_FIPS_SET_TEST_MODE                        105
 148 #define RAND_F_RAND_GET_RAND_METHOD                      101
 149 #define RAND_F_SSLEAY_RAND_BYTES                         100
 150
 151 /* Reason codes. */
 152 #define RAND_R_NON_FIPS_METHOD                           105
 153 #define RAND_R_NOT_IN_TEST_MODE                          106
 154 #define RAND_R_NO_KEY_SET                                107
 155 #define RAND_R_PRNG_ASKING_FOR_TOO_MUCH                  101
 156 #define RAND_R_PRNG_ERROR                                108
 157 #define RAND_R_PRNG_KEYED                                109
 158 #define RAND_R_PRNG_NOT_REKEYED                          102
 159 #define RAND_R_PRNG_NOT_RESEEDED                         103
 160 #define RAND_R_PRNG_NOT_SEEDED                           100
 161 #define RAND_R_PRNG_SEED_MUST_NOT_MATCH_KEY              110
 162 #define RAND_R_PRNG_STUCK                                104
 163
 164 #ifdef  __cplusplus
 165 }
 166 #endif
 167 #endif