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src/secp256k1/src/testrand.h

/********************************************************************** /**********************************************************************
* Copyright (c) 2013, 2014 Pieter Wuille * * Copyright (c) 2013, 2014 Pieter Wuille *
* Distributed under the MIT software license, see the accompanying * * Distributed under the MIT software license, see the accompanying *
* file COPYING or http://www.opensource.org/licenses/mit-license.php.* * file COPYING or http://www.opensource.org/licenses/mit-license.php.*
**********************************************************************/ **********************************************************************/
#ifndef SECP256K1_TESTRAND_H #ifndef SECP256K1_TESTRAND_H
#define SECP256K1_TESTRAND_H #define SECP256K1_TESTRAND_H
#if defined HAVE_CONFIG_H #if defined HAVE_CONFIG_H
#include "libsecp256k1-config.h" #include "libsecp256k1-config.h"
#endif #endif
/* A non-cryptographic RNG used only for test infrastructure. */ /* A non-cryptographic RNG used only for test infrastructure. */
/** Seed the pseudorandom number generator for testing. */ /** Seed the pseudorandom number generator for testing. */
SECP256K1_INLINE static void secp256k1_rand_seed(const unsigned char *seed16); SECP256K1_INLINE static void secp256k1_testrand_seed(const unsigned char *seed16);
/** Generate a pseudorandom number in the range [0..2**32-1]. */ /** Generate a pseudorandom number in the range [0..2**32-1]. */
static uint32_t secp256k1_rand32(void); static uint32_t secp256k1_testrand32(void);
/** Generate a pseudorandom number in the range [0..2**bits-1]. Bits must be 1 or /** Generate a pseudorandom number in the range [0..2**bits-1]. Bits must be 1 or
* more. */ * more. */
static uint32_t secp256k1_rand_bits(int bits); static uint32_t secp256k1_testrand_bits(int bits);
/** Generate a pseudorandom number in the range [0..range-1]. */ /** Generate a pseudorandom number in the range [0..range-1]. */
static uint32_t secp256k1_rand_int(uint32_t range); static uint32_t secp256k1_testrand_int(uint32_t range);
/** Generate a pseudorandom 32-byte array. */ /** Generate a pseudorandom 32-byte array. */
static void secp256k1_rand256(unsigned char *b32); static void secp256k1_testrand256(unsigned char *b32);
/** Generate a pseudorandom 32-byte array with long sequences of zero and one bits. */ /** Generate a pseudorandom 32-byte array with long sequences of zero and one bits. */
static void secp256k1_rand256_test(unsigned char *b32); static void secp256k1_testrand256_test(unsigned char *b32);
/** Generate pseudorandom bytes with long sequences of zero and one bits. */ /** Generate pseudorandom bytes with long sequences of zero and one bits. */
static void secp256k1_rand_bytes_test(unsigned char *bytes, size_t len); static void secp256k1_testrand_bytes_test(unsigned char *bytes, size_t len);
/** Flip a single random bit in a byte array */ /** Flip a single random bit in a byte array */
static void secp256k1_rand_flip(unsigned char *b, size_t len); static void secp256k1_testrand_flip(unsigned char *b, size_t len);
/** Initialize the test RNG using (hex encoded) array up to 16 bytes, or randomly if hexseed is NULL. */ /** Initialize the test RNG using (hex encoded) array up to 16 bytes, or randomly if hexseed is NULL. */
static void secp256k1_rand_init(const char* hexseed); static void secp256k1_testrand_init(const char* hexseed);
/** Print final test information. */ /** Print final test information. */
static void secp256k1_rand_finish(void); static void secp256k1_testrand_finish(void);
#endif /* SECP256K1_TESTRAND_H */ #endif /* SECP256K1_TESTRAND_H */