1 /********************************************************************** 2 * Copyright (c) 2013, 2014 Pieter Wuille * 3 * Distributed under the MIT software license, see the accompanying * 4 * file COPYING or http://www.opensource.org/licenses/mit-license.php.* 5 **********************************************************************/ 6 7 #ifndef SECP256K1_TESTRAND_H 8 #define SECP256K1_TESTRAND_H 9 10 #if defined HAVE_CONFIG_H 11 #include "libsecp256k1-config.h" 12 #endif 13 14 /* A non-cryptographic RNG used only for test infrastructure. */ 15 16 /** Seed the pseudorandom number generator for testing. */ 17 SECP256K1_INLINE static void secp256k1_testrand_seed(const unsigned char *seed16); 18 19 /** Generate a pseudorandom number in the range [0..2**32-1]. */ 20 static uint32_t secp256k1_testrand32(void); 21 22 /** Generate a pseudorandom number in the range [0..2**bits-1]. Bits must be 1 or 23 * more. */ 24 static uint32_t secp256k1_testrand_bits(int bits); 25 26 /** Generate a pseudorandom number in the range [0..range-1]. */ 27 static uint32_t secp256k1_testrand_int(uint32_t range); 28 29 /** Generate a pseudorandom 32-byte array. */ 30 static void secp256k1_testrand256(unsigned char *b32); 31 32 /** Generate a pseudorandom 32-byte array with long sequences of zero and one bits. */ 33 static void secp256k1_testrand256_test(unsigned char *b32); 34 35 /** Generate pseudorandom bytes with long sequences of zero and one bits. */ 36 static void secp256k1_testrand_bytes_test(unsigned char *bytes, size_t len); 37 38 /** Flip a single random bit in a byte array */ 39 static void secp256k1_testrand_flip(unsigned char *b, size_t len); 40 41 /** Initialize the test RNG using (hex encoded) array up to 16 bytes, or randomly if hexseed is NULL. */ 42 static void secp256k1_testrand_init(const char* hexseed); 43 44 /** Print final test information. */ 45 static void secp256k1_testrand_finish(void); 46 47 #endif /* SECP256K1_TESTRAND_H */ 48