lib/libcrypto/rand/rand.h

   1 /* $OpenBSD: rand.h,v 1.22 2014/10/22 14:02:52 jsing Exp $ */
   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 <stdlib.h>
  60
  61 #ifndef HEADER_RAND_H
  62 #define HEADER_RAND_H
  63
  64 #include <openssl/opensslconf.h>
  65
  66 #include <openssl/ossl_typ.h>
  67
  68 #ifdef  __cplusplus
  69 extern "C" {
  70 #endif
  71
  72 /* Already defined in ossl_typ.h */
  73 /* typedef struct rand_meth_st RAND_METHOD; */
  74
  75 struct rand_meth_st {
  76         void (*seed)(const void *buf, int num);
  77         int (*bytes)(unsigned char *buf, int num);
  78         void (*cleanup)(void);
  79         void (*add)(const void *buf, int num, double entropy);
  80         int (*pseudorand)(unsigned char *buf, int num);
  81         int (*status)(void);
  82 };
  83
  84 int RAND_set_rand_method(const RAND_METHOD *meth);
  85 const RAND_METHOD *RAND_get_rand_method(void);
  86 #ifndef OPENSSL_NO_ENGINE
  87 int RAND_set_rand_engine(ENGINE *engine);
  88 #endif
  89 RAND_METHOD *RAND_SSLeay(void);
  90
  91 #ifndef LIBRESSL_INTERNAL
  92 void RAND_cleanup(void );
  93 int  RAND_bytes(unsigned char *buf, int num);
  94 int  RAND_pseudo_bytes(unsigned char *buf, int num);
  95 void RAND_seed(const void *buf, int num);
  96 void RAND_add(const void *buf, int num, double entropy);
  97 int  RAND_load_file(const char *file, long max_bytes);
  98 int  RAND_write_file(const char *file);
  99 const char *RAND_file_name(char *file, size_t num);
 100 int RAND_status(void);
 101 int RAND_poll(void);
 102 #endif
 103
 104 /* BEGIN ERROR CODES */
 105 /* The following lines are auto generated by the script mkerr.pl. Any changes
 106  * made after this point may be overwritten when the script is next run.
 107  */
 108 void ERR_load_RAND_strings(void);
 109
 110 /* Error codes for the RAND functions. (no longer used) */
 111
 112 /* Function codes. */
 113 #define RAND_F_RAND_GET_RAND_METHOD                      101
 114 #define RAND_F_RAND_INIT_FIPS                            102
 115 #define RAND_F_SSLEAY_RAND_BYTES                         100
 116
 117 /* Reason codes. */
 118 #define RAND_R_DUAL_EC_DRBG_DISABLED                     104
 119 #define RAND_R_ERROR_INITIALISING_DRBG                   102
 120 #define RAND_R_ERROR_INSTANTIATING_DRBG                  103
 121 #define RAND_R_NO_FIPS_RANDOM_METHOD_SET                 101
 122 #define RAND_R_PRNG_NOT_SEEDED                           100
 123
 124 #ifdef  __cplusplus
 125 }
 126 #endif
 127 #endif