1/* 2 * Copyright 1995-2021 The OpenSSL Project Authors. All Rights Reserved. 3 * 4 * Licensed under the Apache License 2.0 (the "License"). You may not use 5 * this file except in compliance with the License. You can obtain a copy 6 * in the file LICENSE in the source distribution or at 7 * https://www.openssl.org/source/license.html 8 */ 9 10#ifndef OPENSSL_RAND_H 11# define OPENSSL_RAND_H 12# pragma once 13 14# include <openssl/macros.h> 15# ifndef OPENSSL_NO_DEPRECATED_3_0 16# define HEADER_RAND_H 17# endif 18 19# include <stdlib.h> 20# include <openssl/types.h> 21# include <openssl/e_os2.h> 22# include <openssl/randerr.h> 23# include <openssl/evp.h> 24 25#ifdef __cplusplus 26extern "C" { 27#endif 28 29/* 30 * Default security strength (in the sense of [NIST SP 800-90Ar1]) 31 * 32 * NIST SP 800-90Ar1 supports the strength of the DRBG being smaller than that 33 * of the cipher by collecting less entropy. The current DRBG implementation 34 * does not take RAND_DRBG_STRENGTH into account and sets the strength of the 35 * DRBG to that of the cipher. 36 */ 37# define RAND_DRBG_STRENGTH 256 38 39# ifndef OPENSSL_NO_DEPRECATED_3_0 40struct rand_meth_st { 41 int (*seed) (const void *buf, int num); 42 int (*bytes) (unsigned char *buf, int num); 43 void (*cleanup) (void); 44 int (*add) (const void *buf, int num, double randomness); 45 int (*pseudorand) (unsigned char *buf, int num); 46 int (*status) (void); 47}; 48 49OSSL_DEPRECATEDIN_3_0 int RAND_set_rand_method(const RAND_METHOD *meth); 50OSSL_DEPRECATEDIN_3_0 const RAND_METHOD *RAND_get_rand_method(void); 51# ifndef OPENSSL_NO_ENGINE 52OSSL_DEPRECATEDIN_3_0 int RAND_set_rand_engine(ENGINE *engine); 53# endif 54 55OSSL_DEPRECATEDIN_3_0 RAND_METHOD *RAND_OpenSSL(void); 56# endif /* OPENSSL_NO_DEPRECATED_3_0 */ 57 58# ifndef OPENSSL_NO_DEPRECATED_1_1_0 59# define RAND_cleanup() while(0) continue 60# endif 61int RAND_bytes(unsigned char *buf, int num); 62int RAND_priv_bytes(unsigned char *buf, int num); 63 64/* 65 * Equivalent of RAND_priv_bytes() but additionally taking an OSSL_LIB_CTX and 66 * a strength. 67 */ 68int RAND_priv_bytes_ex(OSSL_LIB_CTX *ctx, unsigned char *buf, size_t num, 69 unsigned int strength); 70 71/* 72 * Equivalent of RAND_bytes() but additionally taking an OSSL_LIB_CTX and 73 * a strength. 74 */ 75int RAND_bytes_ex(OSSL_LIB_CTX *ctx, unsigned char *buf, size_t num, 76 unsigned int strength); 77 78# ifndef OPENSSL_NO_DEPRECATED_1_1_0 79OSSL_DEPRECATEDIN_1_1_0 int RAND_pseudo_bytes(unsigned char *buf, int num); 80# endif 81 82EVP_RAND_CTX *RAND_get0_primary(OSSL_LIB_CTX *ctx); 83EVP_RAND_CTX *RAND_get0_public(OSSL_LIB_CTX *ctx); 84EVP_RAND_CTX *RAND_get0_private(OSSL_LIB_CTX *ctx); 85 86int RAND_set_DRBG_type(OSSL_LIB_CTX *ctx, const char *drbg, const char *propq, 87 const char *cipher, const char *digest); 88int RAND_set_seed_source_type(OSSL_LIB_CTX *ctx, const char *seed, 89 const char *propq); 90 91void RAND_seed(const void *buf, int num); 92void RAND_keep_random_devices_open(int keep); 93 94# if defined(__ANDROID__) && defined(__NDK_FPABI__) 95__NDK_FPABI__ /* __attribute__((pcs("aapcs"))) on ARM */ 96# endif 97void RAND_add(const void *buf, int num, double randomness); 98int RAND_load_file(const char *file, long max_bytes); 99int RAND_write_file(const char *file); 100const char *RAND_file_name(char *file, size_t num); 101int RAND_status(void); 102 103# ifndef OPENSSL_NO_EGD 104int RAND_query_egd_bytes(const char *path, unsigned char *buf, int bytes); 105int RAND_egd(const char *path); 106int RAND_egd_bytes(const char *path, int bytes); 107# endif 108 109int RAND_poll(void); 110 111# if defined(_WIN32) && (defined(BASETYPES) || defined(_WINDEF_H)) 112/* application has to include <windows.h> in order to use these */ 113# ifndef OPENSSL_NO_DEPRECATED_1_1_0 114OSSL_DEPRECATEDIN_1_1_0 void RAND_screen(void); 115OSSL_DEPRECATEDIN_1_1_0 int RAND_event(UINT, WPARAM, LPARAM); 116# endif 117# endif 118 119#ifdef __cplusplus 120} 121#endif 122 123#endif 124