/** @file * IPRT - Random Numbers and Byte Streams. */ /* * Copyright (C) 2006-2012 Oracle Corporation * * This file is part of VirtualBox Open Source Edition (OSE), as * available from http://www.virtualbox.org. This file is free software; * you can redistribute it and/or modify it under the terms of the GNU * General Public License (GPL) as published by the Free Software * Foundation, in version 2 as it comes in the "COPYING" file of the * VirtualBox OSE distribution. VirtualBox OSE is distributed in the * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind. * * The contents of this file may alternatively be used under the terms * of the Common Development and Distribution License Version 1.0 * (CDDL) only, as it comes in the "COPYING.CDDL" file of the * VirtualBox OSE distribution, in which case the provisions of the * CDDL are applicable instead of those of the GPL. * * You may elect to license modified versions of this file under the * terms and conditions of either the GPL or the CDDL or both. */ #ifndef ___iprt_rand_h #define ___iprt_rand_h #include #include RT_C_DECLS_BEGIN /** @defgroup grp_rt_rand RTRand - Random Numbers and Byte Streams * @ingroup grp_rt * @{ */ /** * Fills a buffer with random bytes. * * @param pv Where to store the random bytes. * @param cb Number of bytes to generate. */ RTDECL(void) RTRandBytes(void *pv, size_t cb) RT_NO_THROW; /** * Generate a 32-bit signed random number in the set [i32First..i32Last]. * * @returns The random number. * @param i32First First number in the set. * @param i32Last Last number in the set. */ RTDECL(int32_t) RTRandS32Ex(int32_t i32First, int32_t i32Last) RT_NO_THROW; /** * Generate a 32-bit signed random number. * * @returns The random number. */ RTDECL(int32_t) RTRandS32(void) RT_NO_THROW; /** * Generate a 32-bit unsigned random number in the set [u32First..u32Last]. * * @returns The random number. * @param u32First First number in the set. * @param u32Last Last number in the set. */ RTDECL(uint32_t) RTRandU32Ex(uint32_t u32First, uint32_t u32Last) RT_NO_THROW; /** * Generate a 32-bit unsigned random number. * * @returns The random number. */ RTDECL(uint32_t) RTRandU32(void) RT_NO_THROW; /** * Generate a 64-bit signed random number in the set [i64First..i64Last]. * * @returns The random number. * @param i64First First number in the set. * @param i64Last Last number in the set. */ RTDECL(int64_t) RTRandS64Ex(int64_t i64First, int64_t i64Last) RT_NO_THROW; /** * Generate a 64-bit signed random number. * * @returns The random number. */ RTDECL(int64_t) RTRandS64(void) RT_NO_THROW; /** * Generate a 64-bit unsigned random number in the set [u64First..u64Last]. * * @returns The random number. * @param u64First First number in the set. * @param u64Last Last number in the set. */ RTDECL(uint64_t) RTRandU64Ex(uint64_t u64First, uint64_t u64Last) RT_NO_THROW; /** * Generate a 64-bit unsigned random number. * * @returns The random number. */ RTDECL(uint64_t) RTRandU64(void) RT_NO_THROW; /** * Create an instance of the default random number generator. * * @returns IPRT status code. * @param phRand Where to return the handle to the new random number * generator. */ RTDECL(int) RTRandAdvCreate(PRTRAND phRand) RT_NO_THROW; /** * Create an instance of the default pseudo random number generator. * * @returns IPRT status code. * @param phRand Where to store the handle to the generator. */ RTDECL(int) RTRandAdvCreatePseudo(PRTRAND phRand) RT_NO_THROW; /** * Create an instance of the Park-Miller pseudo random number generator. * * @returns IPRT status code. * @param phRand Where to store the handle to the generator. */ RTDECL(int) RTRandAdvCreateParkMiller(PRTRAND phRand) RT_NO_THROW; /** * Create an instance of the faster random number generator for the OS. * * @returns IPRT status code. * @retval VERR_NOT_SUPPORTED on platforms which doesn't have this feature. * @retval VERR_FILE_NOT_FOUND on system where the random generator hasn't * been installed or configured correctly. * @retval VERR_PATH_NOT_FOUND for the same reasons as VERR_FILE_NOT_FOUND. * * @param phRand Where to store the handle to the generator. * * @remarks Think /dev/urandom. */ RTDECL(int) RTRandAdvCreateSystemFaster(PRTRAND phRand) RT_NO_THROW; /** * Create an instance of the truer random number generator for the OS. * * Don't use this unless you seriously need good random numbers because most * systems will have will have problems producing sufficient entropy for this * and you'll end up blocking while it accumulates. * * @returns IPRT status code. * @retval VERR_NOT_SUPPORTED on platforms which doesn't have this feature. * @retval VERR_FILE_NOT_FOUND on system where the random generator hasn't * been installed or configured correctly. * @retval VERR_PATH_NOT_FOUND for the same reasons as VERR_FILE_NOT_FOUND. * * @param phRand Where to store the handle to the generator. * * @remarks Think /dev/random. */ RTDECL(int) RTRandAdvCreateSystemTruer(PRTRAND phRand) RT_NO_THROW; /** * Destroys a random number generator. * * @returns IPRT status code. * @param hRand Handle to the random number generator. */ RTDECL(int) RTRandAdvDestroy(RTRAND hRand) RT_NO_THROW; /** * Generic method for seeding of a random number generator. * * The different generators may have specialized methods for * seeding, use one of those if you desire better control * over the result. * * @returns IPRT status code. * @retval VERR_NOT_SUPPORTED if it isn't a pseudo generator. * * @param hRand Handle to the random number generator. * @param u64Seed Seed. */ RTDECL(int) RTRandAdvSeed(RTRAND hRand, uint64_t u64Seed) RT_NO_THROW; /** * Save the current state of a pseudo generator. * * This can be use to save the state so it can later be resumed at the same * position. * * @returns IPRT status code. * @retval VINF_SUCCESS on success. *pcbState contains the length of the * returned string and pszState contains the state string. * @retval VERR_BUFFER_OVERFLOW if the supplied buffer is too small. *pcbState * will contain the necessary buffer size. * @retval VERR_NOT_SUPPORTED by non-psuedo generators. * * @param hRand Handle to the random number generator. * @param pszState Where to store the state. The returned string will be * null terminated and printable. * @param pcbState The size of the buffer pszState points to on input, the * size required / used on return (including the * terminator, thus the 'cb' instead of 'cch'). */ RTDECL(int) RTRandAdvSaveState(RTRAND hRand, char *pszState, size_t *pcbState) RT_NO_THROW; /** * Restores the state of a pseudo generator. * * The state must have been obtained using RTRandAdvGetState. * * @returns IPRT status code. * @retval VERR_PARSE_ERROR if the state string is malformed. * @retval VERR_NOT_SUPPORTED by non-psuedo generators. * * @param hRand Handle to the random number generator. * @param pszState The state to load. */ RTDECL(int) RTRandAdvRestoreState(RTRAND hRand, char const *pszState) RT_NO_THROW; /** * Fills a buffer with random bytes. * * @param hRand Handle to the random number generator. * @param pv Where to store the random bytes. * @param cb Number of bytes to generate. */ RTDECL(void) RTRandAdvBytes(RTRAND hRand, void *pv, size_t cb) RT_NO_THROW; /** * Generate a 32-bit signed random number in the set [i32First..i32Last]. * * @returns The random number. * @param hRand Handle to the random number generator. * @param i32First First number in the set. * @param i32Last Last number in the set. */ RTDECL(int32_t) RTRandAdvS32Ex(RTRAND hRand, int32_t i32First, int32_t i32Last) RT_NO_THROW; /** * Generate a 32-bit signed random number. * * @returns The random number. * @param hRand Handle to the random number generator. */ RTDECL(int32_t) RTRandAdvS32(RTRAND hRand) RT_NO_THROW; /** * Generate a 32-bit unsigned random number in the set [u32First..u32Last]. * * @returns The random number. * @param hRand Handle to the random number generator. * @param u32First First number in the set. * @param u32Last Last number in the set. */ RTDECL(uint32_t) RTRandAdvU32Ex(RTRAND hRand, uint32_t u32First, uint32_t u32Last) RT_NO_THROW; /** * Generate a 32-bit unsigned random number. * * @returns The random number. * @param hRand Handle to the random number generator. */ RTDECL(uint32_t) RTRandAdvU32(RTRAND hRand) RT_NO_THROW; /** * Generate a 64-bit signed random number in the set [i64First..i64Last]. * * @returns The random number. * @param hRand Handle to the random number generator. * @param i64First First number in the set. * @param i64Last Last number in the set. */ RTDECL(int64_t) RTRandAdvS64Ex(RTRAND hRand, int64_t i64First, int64_t i64Last) RT_NO_THROW; /** * Generate a 64-bit signed random number. * * @returns The random number. */ RTDECL(int64_t) RTRandAdvS64(RTRAND hRand) RT_NO_THROW; /** * Generate a 64-bit unsigned random number in the set [u64First..u64Last]. * * @returns The random number. * @param hRand Handle to the random number generator. * @param u64First First number in the set. * @param u64Last Last number in the set. */ RTDECL(uint64_t) RTRandAdvU64Ex(RTRAND hRand, uint64_t u64First, uint64_t u64Last) RT_NO_THROW; /** * Generate a 64-bit unsigned random number. * * @returns The random number. * @param hRand Handle to the random number generator. */ RTDECL(uint64_t) RTRandAdvU64(RTRAND hRand) RT_NO_THROW; /** @} */ RT_C_DECLS_END #endif