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/* random.h
*
* Copyright (C) 2006-2015 wolfSSL Inc.
*
* This file is part of wolfSSL. (formerly known as CyaSSL)
*
* wolfSSL is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* wolfSSL is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
*/
#ifndef WOLF_CRYPT_RANDOM_H
#define WOLF_CRYPT_RANDOM_H
#include <wolfssl/wolfcrypt/types.h>
#ifdef HAVE_FIPS
/* for fips @wc_fips */
#include <cyassl/ctaocrypt/random.h>
#endif
#ifdef __cplusplus
extern "C" {
#endif
#ifndef HAVE_FIPS /* avoid redefining structs and macros */
#if defined(HAVE_HASHDRBG) || defined(NO_RC4)
#ifdef NO_SHA256
#error "Hash DRBG requires SHA-256."
#endif /* NO_SHA256 */
#include <wolfssl/wolfcrypt/sha256.h>
#else /* HAVE_HASHDRBG || NO_RC4 */
#include <wolfssl/wolfcrypt/arc4.h>
#endif /* HAVE_HASHDRBG || NO_RC4 */
#if defined(USE_WINDOWS_API)
#if defined(_WIN64)
typedef unsigned __int64 ProviderHandle;
/* type HCRYPTPROV, avoid #include <windows.h> */
#else
typedef unsigned long ProviderHandle;
#endif
#endif
/* OS specific seeder */
typedef struct OS_Seed {
#if defined(USE_WINDOWS_API)
ProviderHandle handle;
#else
int fd;
#endif
} OS_Seed;
#if defined(WOLFSSL_MDK_ARM)
#undef RNG
#define RNG wolfSSL_RNG /* for avoiding name conflict in "stm32f2xx.h" */
#endif
#if defined(HAVE_HASHDRBG) || defined(NO_RC4)
#define DRBG_SEED_LEN (440/8)
struct DRBG; /* Private DRBG state */
/* Hash-based Deterministic Random Bit Generator */
typedef struct RNG {
struct DRBG* drbg;
OS_Seed seed;
byte status;
} RNG;
#else /* HAVE_HASHDRBG || NO_RC4 */
#define WOLFSSL_RNG_CAVIUM_MAGIC 0xBEEF0004
/* secure Random Number Generator */
typedef struct RNG {
OS_Seed seed;
Arc4 cipher;
#ifdef HAVE_CAVIUM
int devId; /* nitrox device id */
word32 magic; /* using cavium magic */
#endif
} RNG;
#endif /* HAVE_HASH_DRBG || NO_RC4 */
#endif /* HAVE_FIPS */
WOLFSSL_LOCAL
int wc_GenerateSeed(OS_Seed* os, byte* seed, word32 sz);
#if defined(HAVE_HASHDRBG) || defined(NO_RC4)
#ifdef HAVE_CAVIUM
WOLFSSL_API int wc_InitRngCavium(RNG*, int);
#endif
#endif /* HAVE_HASH_DRBG || NO_RC4 */
WOLFSSL_API int wc_InitRng(RNG*);
WOLFSSL_API int wc_RNG_GenerateBlock(RNG*, byte*, word32 sz);
WOLFSSL_API int wc_RNG_GenerateByte(RNG*, byte*);
WOLFSSL_API int wc_FreeRng(RNG*);
#if defined(HAVE_HASHDRBG) || defined(NO_RC4)
WOLFSSL_API int wc_RNG_HealthTest(int reseed,
const byte* entropyA, word32 entropyASz,
const byte* entropyB, word32 entropyBSz,
byte* output, word32 outputSz);
#endif /* HAVE_HASHDRBG || NO_RC4 */
#ifdef __cplusplus
} /* extern "C" */
#endif
#endif /* WOLF_CRYPT_RANDOM_H */
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