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https://github.com/espressif/ESP8266_RTOS_SDK.git
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187 lines
4.5 KiB
C
187 lines
4.5 KiB
C
/* random.h
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*
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* Copyright (C) 2006-2018 wolfSSL Inc. All rights reserved.
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*
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* This file is part of wolfSSL.
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*
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* Contact licensing@wolfssl.com with any questions or comments.
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*
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* http://www.wolfssl.com
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*/
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/*!
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\file wolfssl/wolfcrypt/random.h
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*/
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#ifndef WOLF_CRYPT_RANDOM_H
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#define WOLF_CRYPT_RANDOM_H
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#include <wolfssl/wolfcrypt/types.h>
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#ifdef HAVE_FIPS
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/* for fips @wc_fips */
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#include <cyassl/ctaocrypt/random.h>
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#endif
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#ifdef __cplusplus
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extern "C" {
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#endif
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/* Maximum generate block length */
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#ifndef RNG_MAX_BLOCK_LEN
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#ifdef HAVE_INTEL_QA
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#define RNG_MAX_BLOCK_LEN (0xFFFF)
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#else
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#define RNG_MAX_BLOCK_LEN (0x10000)
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#endif
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#endif
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/* Size of the BRBG seed */
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#ifndef DRBG_SEED_LEN
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#define DRBG_SEED_LEN (440/8)
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#endif
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#if !defined(CUSTOM_RAND_TYPE)
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/* To maintain compatibility the default is byte */
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#define CUSTOM_RAND_TYPE byte
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#endif
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/* make sure Hash DRBG is enabled, unless WC_NO_HASHDRBG is defined
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or CUSTOM_RAND_GENERATE_BLOCK is defined*/
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#if !defined(WC_NO_HASHDRBG) || !defined(CUSTOM_RAND_GENERATE_BLOCK)
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#undef HAVE_HASHDRBG
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#define HAVE_HASHDRBG
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#ifndef WC_RESEED_INTERVAL
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#define WC_RESEED_INTERVAL (1000000)
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#endif
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#endif
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#ifndef HAVE_FIPS /* avoid redefining structs and macros */
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/* RNG supports the following sources (in order):
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* 1. CUSTOM_RAND_GENERATE_BLOCK: Defines name of function as RNG source and
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* bypasses the options below.
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* 2. HAVE_INTEL_RDRAND: Uses the Intel RDRAND if supported by CPU.
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* 3. HAVE_HASHDRBG (requires SHA256 enabled): Uses SHA256 based P-RNG
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* seeded via wc_GenerateSeed. This is the default source.
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*/
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/* Seed source can be overriden by defining one of these:
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CUSTOM_RAND_GENERATE_SEED
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CUSTOM_RAND_GENERATE_SEED_OS
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CUSTOM_RAND_GENERATE */
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#if defined(CUSTOM_RAND_GENERATE_BLOCK)
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/* To use define the following:
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* #define CUSTOM_RAND_GENERATE_BLOCK myRngFunc
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* extern int myRngFunc(byte* output, word32 sz);
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*/
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#elif defined(HAVE_HASHDRBG)
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#ifdef NO_SHA256
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#error "Hash DRBG requires SHA-256."
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#endif /* NO_SHA256 */
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#include <wolfssl/wolfcrypt/sha256.h>
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#elif defined(HAVE_WNR)
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/* allow whitewood as direct RNG source using wc_GenerateSeed directly */
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#else
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#error No RNG source defined!
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#endif
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#ifdef HAVE_WNR
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#include <wnr.h>
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#endif
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#ifdef WOLFSSL_ASYNC_CRYPT
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#include <wolfssl/wolfcrypt/async.h>
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#endif
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#if defined(USE_WINDOWS_API)
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#if defined(_WIN64)
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typedef unsigned __int64 ProviderHandle;
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/* type HCRYPTPROV, avoid #include <windows.h> */
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#else
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typedef unsigned long ProviderHandle;
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#endif
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#endif
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/* OS specific seeder */
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typedef struct OS_Seed {
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#if defined(USE_WINDOWS_API)
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ProviderHandle handle;
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#else
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int fd;
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#endif
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} OS_Seed;
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#ifndef WC_RNG_TYPE_DEFINED /* guard on redeclaration */
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typedef struct WC_RNG WC_RNG;
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#define WC_RNG_TYPE_DEFINED
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#endif
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/* RNG context */
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struct WC_RNG {
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OS_Seed seed;
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void* heap;
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#ifdef HAVE_HASHDRBG
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/* Hash-based Deterministic Random Bit Generator */
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struct DRBG* drbg;
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byte status;
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#endif
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#ifdef WOLFSSL_ASYNC_CRYPT
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WC_ASYNC_DEV asyncDev;
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int devId;
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#endif
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};
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#endif /* HAVE_FIPS */
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/* NO_OLD_RNGNAME removes RNG struct name to prevent possible type conflicts,
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* can't be used with CTaoCrypt FIPS */
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#if !defined(NO_OLD_RNGNAME) && !defined(HAVE_FIPS)
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#define RNG WC_RNG
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#endif
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WOLFSSL_LOCAL
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int wc_GenerateSeed(OS_Seed* os, byte* seed, word32 sz);
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#ifdef HAVE_WNR
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/* Whitewood netRandom client library */
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WOLFSSL_API int wc_InitNetRandom(const char*, wnr_hmac_key, int);
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WOLFSSL_API int wc_FreeNetRandom(void);
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#endif /* HAVE_WNR */
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WOLFSSL_API int wc_InitRng(WC_RNG*);
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WOLFSSL_API int wc_InitRng_ex(WC_RNG* rng, void* heap, int devId);
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WOLFSSL_API int wc_RNG_GenerateBlock(WC_RNG*, byte*, word32 sz);
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WOLFSSL_API int wc_RNG_GenerateByte(WC_RNG*, byte*);
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WOLFSSL_API int wc_FreeRng(WC_RNG*);
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#ifdef HAVE_HASHDRBG
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WOLFSSL_LOCAL int wc_RNG_DRBG_Reseed(WC_RNG* rng, const byte* entropy,
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word32 entropySz);
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WOLFSSL_API int wc_RNG_HealthTest(int reseed,
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const byte* entropyA, word32 entropyASz,
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const byte* entropyB, word32 entropyBSz,
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byte* output, word32 outputSz);
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#endif /* HAVE_HASHDRBG */
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#ifdef __cplusplus
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} /* extern "C" */
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#endif
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#endif /* WOLF_CRYPT_RANDOM_H */
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