random.h File Reference

#include <crypto/chacha20.h>
#include <crypto/common.h>
#include <uint256.h>
#include <stdint.h>
#include <limits>

Include dependency graph for random.h:

This graph shows which files directly or indirectly include this file:

Go to the source code of this file.

Classes
class	FastRandomContext
	Fast randomness source. More...

Functions
void	RandAddSeed ()
void	GetRandBytes (unsigned char *buf, int num)
	Functions to gather random data via the OpenSSL PRNG. More...
uint64_t	GetRand (uint64_t nMax)
int	GetRandInt (int nMax)
uint256	GetRandHash ()
void	RandAddSeedSleep ()
	Add a little bit of randomness to the output of GetStrongRangBytes. More...
void	GetStrongRandBytes (unsigned char *buf, int num)
	Function to gather random data from multiple sources, failing whenever any of those sources fail to provide a result. More...
void	GetOSRand (unsigned char *ent32)
	Get 32 bytes of system entropy. More...
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

GetOSRand()

void GetOSRand

(

unsigned char *

ent32

)

Get 32 bytes of system entropy.

Do not use this in application code: use GetStrongRandBytes instead.

Definition at line 204 of file random.cpp.

GetRand()

uint64_t GetRand

(

uint64_t

nMax

)

Definition at line 354 of file random.cpp.

Here is the call graph for this function:

Here is the caller graph for this function:

GetRandBytes()

void GetRandBytes	(	unsigned char *	buf,
		int	num
	)

Functions to gather random data via the OpenSSL PRNG.

Definition at line 275 of file random.cpp.

Here is the caller graph for this function:

GetRandHash()

uint256 GetRandHash

(

)

Definition at line 374 of file random.cpp.

Here is the call graph for this function:

Here is the caller graph for this function:

GetRandInt()

int GetRandInt

(

int

nMax

)

Definition at line 369 of file random.cpp.

Here is the call graph for this function:

Here is the caller graph for this function:

GetStrongRandBytes()

void GetStrongRandBytes	(	unsigned char *	buf,
		int	num
	)

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

Definition at line 319 of file random.cpp.

Here is the caller graph for this function:

RandAddSeed()

void RandAddSeed

(

)

Definition at line 132 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 284 of file random.cpp.

Here is the caller graph for this function:

Random_SanityCheck()

bool Random_SanityCheck

(

)

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

Definition at line 413 of file random.cpp.

RandomInit()

void RandomInit

(

)

Initialize the RNG.

Definition at line 466 of file random.cpp.