random.c File Reference

#include "MagickCore/studio.h"
#include "MagickCore/exception.h"
#include "MagickCore/exception-private.h"
#include "MagickCore/image-private.h"
#include "MagickCore/memory_.h"
#include "MagickCore/memory-private.h"
#include "MagickCore/random_.h"
#include "MagickCore/random-private.h"
#include "MagickCore/resource_.h"
#include "MagickCore/semaphore.h"
#include "MagickCore/signature-private.h"
#include "MagickCore/string_.h"
#include "MagickCore/thread_.h"
#include "MagickCore/thread-private.h"
#include "MagickCore/utility.h"
#include "MagickCore/utility-private.h"

Include dependency graph for random.c:

Go to the source code of this file.

Data Structures
struct	_RandomInfo

Macros
#define	PseudoRandomHash   SHA256Hash
#define	RandomEntropyLevel   9
#define	RandomFilename   "reservoir.xdm"
#define	RandomFiletype   "random"
#define	RandomProtocolMajorVersion   1
#define	RandomProtocolMinorVersion   0
#define	MaxEntropyExtent   64 /* max permitted: 256 */
#define	RandomROTL(x, k)   (((x) << (k)) | ((x) >> (64-(k))))

Functions
static StringInfo *	GenerateEntropicChaos (RandomInfo *)
MagickExport RandomInfo *	AcquireRandomInfo (void)
MagickExport RandomInfo *	DestroyRandomInfo (RandomInfo *random_info)
static ssize_t	ReadRandom (int file, unsigned char *source, size_t length)
MagickExport double	GetPseudoRandomValue (RandomInfo *magick_restrict random_info)
MagickPrivate double	GetRandomInfoNormalize (const RandomInfo *random_info)
MagickPrivate unsigned long *	GetRandomInfoSeed (RandomInfo *random_info)
MagickExport StringInfo *	GetRandomKey (RandomInfo *random_info, const size_t length)
MagickExport unsigned long	GetRandomSecretKey (const RandomInfo *random_info)
MagickExport double	GetRandomValue (RandomInfo *random_info)
MagickPrivate MagickBooleanType	RandomComponentGenesis (void)
MagickPrivate void	RandomComponentTerminus (void)
static void	IncrementRandomNonce (StringInfo *nonce)
MagickExport void	SetRandomKey (RandomInfo *random_info, const size_t length, unsigned char *key)
MagickExport void	SetRandomSecretKey (const unsigned long key)
MagickExport void	SetRandomTrueRandom (const MagickBooleanType true_random)

Variables
char **	environ
static SemaphoreInfo *	random_semaphore = (SemaphoreInfo *) NULL
static unsigned long	secret_key = ~0UL
static MagickBooleanType	gather_true_random = MagickFalse

Macro Definition Documentation

MaxEntropyExtent

#define MaxEntropyExtent   64 /* max permitted: 256 */

PseudoRandomHash

#define PseudoRandomHash   SHA256Hash

Definition at line 72 of file random.c.

RandomEntropyLevel

#define RandomEntropyLevel   9

Definition at line 73 of file random.c.

RandomFilename

#define RandomFilename   "reservoir.xdm"

Definition at line 74 of file random.c.

RandomFiletype

#define RandomFiletype   "random"

Definition at line 75 of file random.c.

RandomProtocolMajorVersion

#define RandomProtocolMajorVersion   1

Definition at line 76 of file random.c.

RandomProtocolMinorVersion

#define RandomProtocolMinorVersion   0

Definition at line 77 of file random.c.

RandomROTL

#define RandomROTL	(		x,
			k
	)		(((x) << (k)) | ((x) >> (64-(k))))

Function Documentation

AcquireRandomInfo()

MagickExport RandomInfo * AcquireRandomInfo

(

void

)

Definition at line 166 of file random.c.

References AcquireCriticalMemory(), AcquireSemaphoreInfo(), AcquireSignatureInfo(), AcquireStringInfo(), DestroySignatureInfo(), DestroyStringInfo(), FinalizeSignature(), GenerateEntropicChaos(), GetRandomKey(), GetSignatureDigest(), GetSignatureDigestsize(), GetStringInfoDatum(), InitializeSignature(), MagickCoreSignature, MagickMin, MagickULLConstant, _RandomInfo::nonce, _RandomInfo::normalize, _RandomInfo::protocol_major, _RandomInfo::protocol_minor, random_info, RandomProtocolMajorVersion, RandomProtocolMinorVersion, _RandomInfo::reservoir, ResetStringInfo(), ResourceLimitFatalError, _RandomInfo::secret_key, secret_key, _RandomInfo::seed, _RandomInfo::semaphore, SetStringInfo(), SetStringInfoDatum(), SetStringInfoLength(), _RandomInfo::signature, _RandomInfo::signature_info, ThrowFatalException, _RandomInfo::timestamp, and UpdateSignature().

Referenced by AcquireRandomInfoTLS(), AcquireUniqueFileResource(), AllocFxRt(), GetVirtualPixelCacheNexus(), KmeansImage(), PlasmaImage(), and ShredFile().

DestroyRandomInfo()

MagickExport RandomInfo * DestroyRandomInfo

(

RandomInfo *

random_info

)

Definition at line 277 of file random.c.

References DestroySignatureInfo(), DestroyStringInfo(), GetMagickModule, IsEventLogging(), LockSemaphoreInfo(), LogMagickEvent(), MagickCoreSignature, MagickFalse, _RandomInfo::nonce, random_info, RelinquishMagickMemory(), RelinquishSemaphoreInfo(), _RandomInfo::reservoir, _RandomInfo::seed, _RandomInfo::semaphore, _RandomInfo::signature, _RandomInfo::signature_info, TraceEvent, and UnlockSemaphoreInfo().

Referenced by DestroyFxRt(), DestroyPixelCache(), DestroyRandomInfoTLS(), KmeansImage(), PlasmaImage(), ResourceComponentTerminus(), and ShredFile().

GenerateEntropicChaos()

static StringInfo * GenerateEntropicChaos ( RandomInfo *  random_info )

static

Definition at line 351 of file random.c.

References AcquireString(), AcquireStringInfo(), ConcatenateStringInfo(), DestroyString(), DestroyStringInfo(), environ, gather_true_random, GetMagickThreadId(), GetStringInfoDatum(), LockSemaphoreInfo(), MagickFalse, MaxEntropyExtent, O_BINARY, open_utf8(), random_info, ReadRandom(), _RandomInfo::semaphore, SetStringInfoDatum(), SetStringInfoLength(), StringToStringInfo(), and UnlockSemaphoreInfo().

Referenced by AcquireRandomInfo().

GetPseudoRandomValue()

MagickExport double GetPseudoRandomValue

(

RandomInfo *magick_restrict

random_info

)

Definition at line 602 of file random.c.

References _RandomInfo::normalize, random_info, RandomROTL, and _RandomInfo::seed.

Referenced by AllocFxRt(), ExecuteRPN(), GenerateDifferentialNoise(), PlasmaPixel(), RandomThresholdImage(), RandomX(), RandomY(), SketchImage(), and SpreadImage().

GetRandomInfoNormalize()

MagickPrivate double GetRandomInfoNormalize

(

const RandomInfo *

random_info

)

Definition at line 642 of file random.c.

References _RandomInfo::normalize, and random_info.

GetRandomInfoSeed()

MagickPrivate unsigned long * GetRandomInfoSeed

(

RandomInfo *

random_info

)

Definition at line 670 of file random.c.

References random_info, and _RandomInfo::seed.

GetRandomKey()

MagickExport StringInfo * GetRandomKey	(	RandomInfo *	random_info,
		const size_t	length
	)

Definition at line 700 of file random.c.

References AcquireStringInfo(), GetStringInfoDatum(), random_info, and SetRandomKey().

Referenced by AcquireRandomInfo(), AcquireUniqueFileResource(), and ShredFile().

GetRandomSecretKey()

MagickExport unsigned long GetRandomSecretKey

(

const RandomInfo *

random_info

)

Definition at line 733 of file random.c.

References random_info, and _RandomInfo::secret_key.

Referenced by AddNoiseImage(), EvaluateImage(), EvaluateImages(), RandomThresholdImage(), SketchImage(), and SpreadImage().

GetRandomValue()

MagickExport double GetRandomValue

(

RandomInfo *

random_info

)

Definition at line 758 of file random.c.

References random_info, and SetRandomKey().

IncrementRandomNonce()

static void IncrementRandomNonce ( StringInfo *  nonce )

inlinestatic

Definition at line 850 of file random.c.

References GetStringInfoDatum(), GetStringInfoLength(), RandomFatalError, and ThrowFatalException.

Referenced by SetRandomKey().

RandomComponentGenesis()

MagickPrivate MagickBooleanType RandomComponentGenesis

(

void

)

Definition at line 790 of file random.c.

References AcquireSemaphoreInfo(), MagickTrue, and random_semaphore.

Referenced by MagickCoreGenesis().

RandomComponentTerminus()

MagickPrivate void RandomComponentTerminus

(

void

)

Definition at line 815 of file random.c.

References ActivateSemaphoreInfo(), random_semaphore, and RelinquishSemaphoreInfo().

Referenced by MagickCoreTerminus().

ReadRandom()

static ssize_t ReadRandom ( int  file, unsigned char *  source, size_t  length  )

static

Definition at line 324 of file random.c.

Referenced by GenerateEntropicChaos().

SetRandomKey()

MagickExport void SetRandomKey	(	RandomInfo *	random_info,
		const size_t	length,
		unsigned char *	key
	)

Definition at line 868 of file random.c.

References FinalizeSignature(), GetSignatureDigest(), GetSignatureDigestsize(), GetStringInfoDatum(), _RandomInfo::i, IncrementRandomNonce(), InitializeSignature(), LockSemaphoreInfo(), _RandomInfo::nonce, random_info, _RandomInfo::reservoir, _RandomInfo::semaphore, SetStringInfo(), _RandomInfo::signature_info, UnlockSemaphoreInfo(), and UpdateSignature().

Referenced by GetRandomKey(), and GetRandomValue().

SetRandomSecretKey()

MagickExport void SetRandomSecretKey

(

const unsigned long

key

)

Definition at line 945 of file random.c.

References secret_key.

SetRandomTrueRandom()

MagickExport void SetRandomTrueRandom

(

const MagickBooleanType

true_random

)

Definition at line 974 of file random.c.

References gather_true_random.

Variable Documentation

environ

char** environ

extern

Referenced by GenerateEntropicChaos().

gather_true_random

MagickBooleanType gather_true_random = MagickFalse

static

Definition at line 140 of file random.c.

Referenced by GenerateEntropicChaos(), and SetRandomTrueRandom().

random_semaphore

SemaphoreInfo* random_semaphore = (SemaphoreInfo *) NULL

static

Definition at line 134 of file random.c.

Referenced by RandomComponentGenesis(), and RandomComponentTerminus().

secret_key

unsigned long secret_key = ~0UL

static

Definition at line 137 of file random.c.

Referenced by AcquireRandomInfo(), and SetRandomSecretKey().