random.cpp File Reference

#include "random.h"
#include "crypto/sha512.h"
#include "support/cleanse.h"
#include "util.h"
#include "utilstrencodings.h"
#include <stdlib.h>
#include <limits>
#include <chrono>
#include <thread>
#include <sys/time.h>
#include <mutex>
#include <openssl/err.h>
#include <openssl/rand.h>

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Functions
void	RandAddSeed ()
void	GetDevURandom (unsigned char *ent32)
	Fallback: get 32 bytes of system entropy from /dev/urandom. More...
void	GetOSRand (unsigned char *ent32)
	Get 32 bytes of system entropy. More...
void	GetRandBytes (unsigned char *buf, int num)
	Functions to gather random data via the OpenSSL PRNG. More...
void	RandAddSeedSleep ()
	Add a little bit of randomness to the output of GetStrongRangBytes. More...
void	GetStrongRandBytes (unsigned char *out, int num)
	Function to gather random data from multiple sources, failing whenever any of those source fail to provide a result. More...
uint64_t	GetRand (uint64_t nMax)
int	GetRandInt (int nMax)
uint256	GetRandHash ()
bool	Random_SanityCheck ()
	Check that OS randomness is available and returning the requested number of bytes. More...
void	RandomInit ()
	Initialize the RNG. More...

Function Documentation

GetDevURandom()

void GetDevURandom

(

unsigned char *

ent32

)

Fallback: get 32 bytes of system entropy from /dev/urandom.

The most compatible way to get cryptographic randomness on UNIX-ish platforms.

Definition at line 183 of file random.cpp.

GetOSRand()

void GetOSRand

(

unsigned char *

ent32

)

Get 32 bytes of system entropy.

Definition at line 203 of file random.cpp.

GetRand()

uint64_t GetRand

(

uint64_t

nMax

)

Definition at line 353 of file random.cpp.

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GetRandBytes()

void GetRandBytes	(	unsigned char *	buf,
		int	num
	)

Functions to gather random data via the OpenSSL PRNG.

Definition at line 274 of file random.cpp.

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GetRandHash()

uint256 GetRandHash

(

)

Definition at line 373 of file random.cpp.

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GetRandInt()

int GetRandInt

(

int

nMax

)

Definition at line 368 of file random.cpp.

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GetStrongRandBytes()

void GetStrongRandBytes	(	unsigned char *	out,
		int	num
	)

Function to gather random data from multiple sources, failing whenever any of those source fail to provide a result.

Definition at line 318 of file random.cpp.

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RandAddSeed()

void RandAddSeed

(

)

Definition at line 131 of file random.cpp.

RandAddSeedSleep()

void RandAddSeedSleep

(

)

Add a little bit of randomness to the output of GetStrongRangBytes.

This sleeps for a millisecond, so should only be called when there is no other work to be done.

Definition at line 283 of file random.cpp.

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Random_SanityCheck()

bool Random_SanityCheck

(

)

Check that OS randomness is available and returning the requested number of bytes.

Definition at line 412 of file random.cpp.

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RandomInit()

void RandomInit

(

)

Initialize the RNG.

Definition at line 465 of file random.cpp.

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