You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
49 lines
1.3 KiB
49 lines
1.3 KiB
// Copyright (c) 2009-2010 Satoshi Nakamoto |
|
// Copyright (c) 2009-2014 The Bitcoin Core developers |
|
// Distributed under the MIT software license, see the accompanying |
|
// file COPYING or http://www.opensource.org/licenses/mit-license.php. |
|
|
|
#ifndef BITCOIN_RANDOM_H |
|
#define BITCOIN_RANDOM_H |
|
|
|
#include "uint256.h" |
|
|
|
#include <stdint.h> |
|
|
|
/** |
|
* Seed OpenSSL PRNG with additional entropy data |
|
*/ |
|
void RandAddSeed(); |
|
void RandAddSeedPerfmon(); |
|
|
|
/** |
|
* Functions to gather random data via the OpenSSL PRNG |
|
*/ |
|
void GetRandBytes(unsigned char* buf, int num); |
|
uint64_t GetRand(uint64_t nMax); |
|
int GetRandInt(int nMax); |
|
uint256 GetRandHash(); |
|
|
|
/** |
|
* Seed insecure_rand using the random pool. |
|
* @param Deterministic Use a deterministic seed |
|
*/ |
|
void seed_insecure_rand(bool fDeterministic = false); |
|
|
|
/** |
|
* MWC RNG of George Marsaglia |
|
* This is intended to be fast. It has a period of 2^59.3, though the |
|
* least significant 16 bits only have a period of about 2^30.1. |
|
* |
|
* @return random value |
|
*/ |
|
extern uint32_t insecure_rand_Rz; |
|
extern uint32_t insecure_rand_Rw; |
|
static inline uint32_t insecure_rand(void) |
|
{ |
|
insecure_rand_Rz = 36969 * (insecure_rand_Rz & 65535) + (insecure_rand_Rz >> 16); |
|
insecure_rand_Rw = 18000 * (insecure_rand_Rw & 65535) + (insecure_rand_Rw >> 16); |
|
return (insecure_rand_Rw << 16) + insecure_rand_Rz; |
|
} |
|
|
|
#endif // BITCOIN_RANDOM_H
|
|
|