251 lines
7.4 KiB
C
251 lines
7.4 KiB
C
/* random.h
|
|
*
|
|
* Copyright (C) 2006-2019 wolfSSL Inc.
|
|
*
|
|
* This file is part of wolfSSL.
|
|
*
|
|
* 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 02110-1335, USA
|
|
*/
|
|
|
|
/*!
|
|
\file wolfssl/wolfcrypt/random.h
|
|
*/
|
|
|
|
|
|
|
|
#ifndef WOLF_CRYPT_RANDOM_H
|
|
#define WOLF_CRYPT_RANDOM_H
|
|
|
|
#include <wolfssl/wolfcrypt/types.h>
|
|
|
|
#if defined(HAVE_FIPS) && \
|
|
defined(HAVE_FIPS_VERSION) && (HAVE_FIPS_VERSION >= 2)
|
|
#include <wolfssl/wolfcrypt/fips.h>
|
|
#endif /* HAVE_FIPS_VERSION >= 2 */
|
|
|
|
/* included for fips @wc_fips */
|
|
#if defined(HAVE_FIPS) && \
|
|
(!defined(HAVE_FIPS_VERSION) || (HAVE_FIPS_VERSION < 2))
|
|
#include <cyassl/ctaocrypt/random.h>
|
|
#endif
|
|
|
|
#ifdef __cplusplus
|
|
extern "C" {
|
|
#endif
|
|
|
|
/* Maximum generate block length */
|
|
#ifndef RNG_MAX_BLOCK_LEN
|
|
#ifdef HAVE_INTEL_QA
|
|
#define RNG_MAX_BLOCK_LEN (0xFFFFl)
|
|
#else
|
|
#define RNG_MAX_BLOCK_LEN (0x10000l)
|
|
#endif
|
|
#endif
|
|
|
|
/* Size of the BRBG seed */
|
|
#ifndef DRBG_SEED_LEN
|
|
#define DRBG_SEED_LEN (440/8)
|
|
#endif
|
|
|
|
|
|
#if !defined(CUSTOM_RAND_TYPE)
|
|
/* To maintain compatibility the default is byte */
|
|
#define CUSTOM_RAND_TYPE byte
|
|
#endif
|
|
|
|
/* make sure Hash DRBG is enabled, unless WC_NO_HASHDRBG is defined
|
|
or CUSTOM_RAND_GENERATE_BLOCK is defined */
|
|
#if !defined(WC_NO_HASHDRBG) && !defined(CUSTOM_RAND_GENERATE_BLOCK)
|
|
#undef HAVE_HASHDRBG
|
|
#define HAVE_HASHDRBG
|
|
#ifndef WC_RESEED_INTERVAL
|
|
#define WC_RESEED_INTERVAL (1000000)
|
|
#endif
|
|
#endif
|
|
|
|
|
|
/* avoid redefinition of structs */
|
|
#if !defined(HAVE_FIPS) || \
|
|
(defined(HAVE_FIPS_VERSION) && (HAVE_FIPS_VERSION >= 2))
|
|
|
|
/* RNG supports the following sources (in order):
|
|
* 1. CUSTOM_RAND_GENERATE_BLOCK: Defines name of function as RNG source and
|
|
* bypasses the options below.
|
|
* 2. HAVE_INTEL_RDRAND: Uses the Intel RDRAND if supported by CPU.
|
|
* 3. HAVE_HASHDRBG (requires SHA256 enabled): Uses SHA256 based P-RNG
|
|
* seeded via wc_GenerateSeed. This is the default source.
|
|
*/
|
|
|
|
/* Seed source can be overridden by defining one of these:
|
|
CUSTOM_RAND_GENERATE_SEED
|
|
CUSTOM_RAND_GENERATE_SEED_OS
|
|
CUSTOM_RAND_GENERATE */
|
|
|
|
|
|
#if defined(CUSTOM_RAND_GENERATE_BLOCK)
|
|
/* To use define the following:
|
|
* #define CUSTOM_RAND_GENERATE_BLOCK myRngFunc
|
|
* extern int myRngFunc(byte* output, word32 sz);
|
|
*/
|
|
#elif defined(HAVE_HASHDRBG)
|
|
#ifdef NO_SHA256
|
|
#error "Hash DRBG requires SHA-256."
|
|
#endif /* NO_SHA256 */
|
|
#include <wolfssl/wolfcrypt/sha256.h>
|
|
#elif defined(HAVE_WNR)
|
|
/* allow whitewood as direct RNG source using wc_GenerateSeed directly */
|
|
#elif defined(HAVE_INTEL_RDRAND)
|
|
/* Intel RDRAND or RDSEED */
|
|
#elif !defined(WC_NO_RNG)
|
|
#error No RNG source defined!
|
|
#endif
|
|
|
|
#ifdef HAVE_WNR
|
|
#include <wnr.h>
|
|
#endif
|
|
|
|
#ifdef WOLFSSL_ASYNC_CRYPT
|
|
#include <wolfssl/wolfcrypt/async.h>
|
|
#endif
|
|
|
|
|
|
#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
|
|
#if defined(WOLF_CRYPTO_CB)
|
|
int devId;
|
|
#endif
|
|
} OS_Seed;
|
|
|
|
|
|
#ifndef WC_RNG_TYPE_DEFINED /* guard on redeclaration */
|
|
typedef struct WC_RNG WC_RNG;
|
|
#define WC_RNG_TYPE_DEFINED
|
|
#endif
|
|
|
|
/* RNG context */
|
|
struct WC_RNG {
|
|
OS_Seed seed;
|
|
void* heap;
|
|
#ifdef HAVE_HASHDRBG
|
|
/* Hash-based Deterministic Random Bit Generator */
|
|
struct DRBG* drbg;
|
|
#if defined(WOLFSSL_NO_MALLOC) && !defined(WOLFSSL_STATIC_MEMORY)
|
|
#define DRBG_STRUCT_SZ ((sizeof(word32)*3) + (DRBG_SEED_LEN*2))
|
|
#ifdef WOLFSSL_SMALL_STACK_CACHE
|
|
#define DRBG_STRUCT_SZ_SHA256 (sizeof(wc_Sha256))
|
|
#else
|
|
#define DRBG_STRUCT_SZ_SHA256 0
|
|
#endif
|
|
#if defined(WOLFSSL_ASYNC_CRYPT) || defined(WOLF_CRYPTO_CB)
|
|
#define DRBG_STRUCT_SZ_ASYNC (sizeof(void*) + sizeof(int))
|
|
#else
|
|
#define DRBG_STRUCT_SZ_ASYNC 0
|
|
#endif
|
|
byte drbg_data[DRBG_STRUCT_SZ + DRBG_STRUCT_SZ_SHA256 + DRBG_STRUCT_SZ_ASYNC];
|
|
#endif
|
|
byte status;
|
|
#endif
|
|
#ifdef WOLFSSL_ASYNC_CRYPT
|
|
WC_ASYNC_DEV asyncDev;
|
|
#endif
|
|
#if defined(WOLFSSL_ASYNC_CRYPT) || defined(WOLF_CRYPTO_CB)
|
|
int devId;
|
|
#endif
|
|
};
|
|
|
|
#endif /* NO FIPS or have FIPS v2*/
|
|
|
|
/* NO_OLD_RNGNAME removes RNG struct name to prevent possible type conflicts,
|
|
* can't be used with CTaoCrypt FIPS */
|
|
#if !defined(NO_OLD_RNGNAME) && !defined(HAVE_FIPS)
|
|
#define RNG WC_RNG
|
|
#endif
|
|
|
|
|
|
WOLFSSL_LOCAL
|
|
int wc_GenerateSeed(OS_Seed* os, byte* seed, word32 sz);
|
|
|
|
|
|
#ifdef HAVE_WNR
|
|
/* Whitewood netRandom client library */
|
|
WOLFSSL_API int wc_InitNetRandom(const char*, wnr_hmac_key, int);
|
|
WOLFSSL_API int wc_FreeNetRandom(void);
|
|
#endif /* HAVE_WNR */
|
|
|
|
|
|
WOLFSSL_ABI WOLFSSL_API WC_RNG* wc_rng_new(byte*, word32, void*);
|
|
WOLFSSL_ABI WOLFSSL_API void wc_rng_free(WC_RNG*);
|
|
|
|
|
|
#ifndef WC_NO_RNG
|
|
WOLFSSL_API int wc_InitRng(WC_RNG*);
|
|
WOLFSSL_API int wc_InitRng_ex(WC_RNG* rng, void* heap, int devId);
|
|
WOLFSSL_API int wc_InitRngNonce(WC_RNG* rng, byte* nonce, word32 nonceSz);
|
|
WOLFSSL_API int wc_InitRngNonce_ex(WC_RNG* rng, byte* nonce, word32 nonceSz,
|
|
void* heap, int devId);
|
|
WOLFSSL_API int wc_RNG_GenerateBlock(WC_RNG*, byte*, word32 sz);
|
|
WOLFSSL_API int wc_RNG_GenerateByte(WC_RNG*, byte*);
|
|
WOLFSSL_API int wc_FreeRng(WC_RNG*);
|
|
#else
|
|
#include <wolfssl/wolfcrypt/error-crypt.h>
|
|
#define wc_InitRng(rng) NOT_COMPILED_IN
|
|
#define wc_InitRng_ex(rng, h, d) NOT_COMPILED_IN
|
|
#define wc_InitRngNonce(rng, n, s) NOT_COMPILED_IN
|
|
#define wc_InitRngNonce_ex(rng, n, s, h, d) NOT_COMPILED_IN
|
|
#define wc_RNG_GenerateBlock(rng, b, s) NOT_COMPILED_IN
|
|
#define wc_RNG_GenerateByte(rng, b) NOT_COMPILED_IN
|
|
#define wc_FreeRng(rng) (void)NOT_COMPILED_IN
|
|
#endif
|
|
|
|
|
|
|
|
#ifdef HAVE_HASHDRBG
|
|
WOLFSSL_LOCAL int wc_RNG_DRBG_Reseed(WC_RNG* rng, const byte* entropy,
|
|
word32 entropySz);
|
|
WOLFSSL_API int wc_RNG_TestSeed(const byte* seed, word32 seedSz);
|
|
WOLFSSL_API int wc_RNG_HealthTest(int reseed,
|
|
const byte* entropyA, word32 entropyASz,
|
|
const byte* entropyB, word32 entropyBSz,
|
|
byte* output, word32 outputSz);
|
|
WOLFSSL_API int wc_RNG_HealthTest_ex(int reseed,
|
|
const byte* nonce, word32 nonceSz,
|
|
const byte* entropyA, word32 entropyASz,
|
|
const byte* entropyB, word32 entropyBSz,
|
|
byte* output, word32 outputSz,
|
|
void* heap, int devId);
|
|
#endif /* HAVE_HASHDRBG */
|
|
|
|
#ifdef __cplusplus
|
|
} /* extern "C" */
|
|
#endif
|
|
|
|
#endif /* WOLF_CRYPT_RANDOM_H */
|
|
|