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      1 /* crypto/rand/rand.h */
      2 /* Copyright (C) 1995-1998 Eric Young (eay (at) cryptsoft.com)
      3  * All rights reserved.
      4  *
      5  * This package is an SSL implementation written
      6  * by Eric Young (eay (at) 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 (at) 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 (at) 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 (at) 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 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);
     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 
    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
    150