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/*
* Copyright 1995-2021 The OpenSSL Project Authors. All Rights Reserved.
*
* Licensed under the Apache License 2.0 (the "License"). You may not use
* this file except in compliance with the License. You can obtain a copy
* in the file LICENSE in the source distribution or at
* https://www.openssl.org/source/license.html
*/
#ifndef OPENSSL_RAND_H
# define OPENSSL_RAND_H
# pragma once
# include <openssl/macros.h>
# ifndef OPENSSL_NO_DEPRECATED_3_0
# define HEADER_RAND_H
# endif
# include <stdlib.h>
# include <openssl/types.h>
# include <openssl/e_os2.h>
# include <openssl/randerr.h>
# include <openssl/evp.h>
#ifdef __cplusplus
extern "C" {
#endif
/*
* Default security strength (in the sense of [NIST SP 800-90Ar1])
*
* NIST SP 800-90Ar1 supports the strength of the DRBG being smaller than that
* of the cipher by collecting less entropy. The current DRBG implementation
* does not take RAND_DRBG_STRENGTH into account and sets the strength of the
* DRBG to that of the cipher.
*/
# define RAND_DRBG_STRENGTH 256
# ifndef OPENSSL_NO_DEPRECATED_3_0
struct rand_meth_st {
int (*seed) (const void *buf, int num);
int (*bytes) (unsigned char *buf, int num);
void (*cleanup) (void);
int (*add) (const void *buf, int num, double randomness);
int (*pseudorand) (unsigned char *buf, int num);
int (*status) (void);
};
OSSL_DEPRECATEDIN_3_0 int RAND_set_rand_method(const RAND_METHOD *meth);
OSSL_DEPRECATEDIN_3_0 const RAND_METHOD *RAND_get_rand_method(void);
# ifndef OPENSSL_NO_ENGINE
OSSL_DEPRECATEDIN_3_0 int RAND_set_rand_engine(ENGINE *engine);
# endif
OSSL_DEPRECATEDIN_3_0 RAND_METHOD *RAND_OpenSSL(void);
# endif /* OPENSSL_NO_DEPRECATED_3_0 */
# ifndef OPENSSL_NO_DEPRECATED_1_1_0
# define RAND_cleanup() while(0) continue
# endif
int RAND_bytes(unsigned char *buf, int num);
int RAND_priv_bytes(unsigned char *buf, int num);
/*
* Equivalent of RAND_priv_bytes() but additionally taking an OSSL_LIB_CTX and
* a strength.
*/
int RAND_priv_bytes_ex(OSSL_LIB_CTX *ctx, unsigned char *buf, size_t num,
unsigned int strength);
/*
* Equivalent of RAND_bytes() but additionally taking an OSSL_LIB_CTX and
* a strength.
*/
int RAND_bytes_ex(OSSL_LIB_CTX *ctx, unsigned char *buf, size_t num,
unsigned int strength);
# ifndef OPENSSL_NO_DEPRECATED_1_1_0
OSSL_DEPRECATEDIN_1_1_0 int RAND_pseudo_bytes(unsigned char *buf, int num);
# endif
EVP_RAND_CTX *RAND_get0_primary(OSSL_LIB_CTX *ctx);
EVP_RAND_CTX *RAND_get0_public(OSSL_LIB_CTX *ctx);
EVP_RAND_CTX *RAND_get0_private(OSSL_LIB_CTX *ctx);
int RAND_set_DRBG_type(OSSL_LIB_CTX *ctx, const char *drbg, const char *propq,
const char *cipher, const char *digest);
int RAND_set_seed_source_type(OSSL_LIB_CTX *ctx, const char *seed,
const char *propq);
void RAND_seed(const void *buf, int num);
void RAND_keep_random_devices_open(int keep);
# if defined(__ANDROID__) && defined(__NDK_FPABI__)
__NDK_FPABI__ /* __attribute__((pcs("aapcs"))) on ARM */
# endif
void RAND_add(const void *buf, int num, double randomness);
int RAND_load_file(const char *file, long max_bytes);
int RAND_write_file(const char *file);
const char *RAND_file_name(char *file, size_t num);
int RAND_status(void);
# ifndef OPENSSL_NO_EGD
int RAND_query_egd_bytes(const char *path, unsigned char *buf, int bytes);
int RAND_egd(const char *path);
int RAND_egd_bytes(const char *path, int bytes);
# endif
int RAND_poll(void);
# if defined(_WIN32) && (defined(BASETYPES) || defined(_WINDEF_H))
/* application has to include <windows.h> in order to use these */
# ifndef OPENSSL_NO_DEPRECATED_1_1_0
OSSL_DEPRECATEDIN_1_1_0 void RAND_screen(void);
OSSL_DEPRECATEDIN_1_1_0 int RAND_event(UINT, WPARAM, LPARAM);
# endif
# endif
#ifdef __cplusplus
}
#endif
#endif
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