signature.c File Reference

#include "magick/studio.h"
#include "magick/cache.h"
#include "magick/exception.h"
#include "magick/exception-private.h"
#include "magick/property.h"
#include "magick/image.h"
#include "magick/memory_.h"
#include "magick/quantum.h"
#include "magick/quantum-private.h"
#include "magick/signature.h"
#include "magick/signature-private.h"
#include "magick/string_.h"

Include dependency graph for signature.c:

Data Structures
struct	_SignatureInfo

Macros
#define	SignatureBlocksize   64
#define	SignatureDigestsize   32
#define	Sigma0(x)   (RotateRight(x,7) ^ RotateRight(x,18) ^ Trunc32((x) >> 3))
#define	Sigma1(x)   (RotateRight(x,17) ^ RotateRight(x,19) ^ Trunc32((x) >> 10))
#define	Suma0(x)   (RotateRight(x,2) ^ RotateRight(x,13) ^ RotateRight(x,22))
#define	Suma1(x)   (RotateRight(x,6) ^ RotateRight(x,11) ^ RotateRight(x,25))

Functions
static void	TransformSignature (SignatureInfo *)
MagickExport SignatureInfo *	AcquireSignatureInfo (void)
MagickExport SignatureInfo *	DestroySignatureInfo (SignatureInfo *signature_info)
MagickExport void	FinalizeSignature (SignatureInfo *signature_info)
MagickExport unsigned int	GetSignatureBlocksize (const SignatureInfo *signature_info)
MagickExport const StringInfo *	GetSignatureDigest (const SignatureInfo *signature_info)
MagickExport unsigned int	GetSignatureDigestsize (const SignatureInfo *signature_info)
MagickExport void	InitializeSignature (SignatureInfo *signature_info)
MagickExport void	SetSignatureDigest (SignatureInfo *signature_info, const StringInfo *digest)
MagickExport MagickBooleanType	SignatureImage (Image *image)
static unsigned int	Ch (unsigned int x, unsigned int y, unsigned int z)
static unsigned int	Maj (unsigned int x, unsigned int y, unsigned int z)
static unsigned int	Trunc32 (unsigned int x)
static unsigned int	RotateRight (unsigned int x, unsigned int n)
MagickExport void	UpdateSignature (SignatureInfo *signature_info, const StringInfo *message)

Macro Definition Documentation

#define Sigma0

(

x

)

(RotateRight(x,7) ^ RotateRight(x,18) ^ Trunc32((x) >> 3))

Referenced by TransformSignature().

#define Sigma1

(

x

)

(RotateRight(x,17) ^ RotateRight(x,19) ^ Trunc32((x) >> 10))

Referenced by TransformSignature().

#define SignatureBlocksize   64

Referenced by AcquireSignatureInfo().

#define SignatureDigestsize   32

Referenced by AcquireSignatureInfo(), and FinalizeSignature().

#define Suma0

(

x

)

(RotateRight(x,2) ^ RotateRight(x,13) ^ RotateRight(x,22))

Referenced by TransformSignature().

#define Suma1

(

x

)

(RotateRight(x,6) ^ RotateRight(x,11) ^ RotateRight(x,25))

Referenced by TransformSignature().

Function Documentation

MagickExport SignatureInfo* AcquireSignatureInfo

(

void

)

References _SignatureInfo::accumulator, AcquireMagickMemory(), AcquireQuantumMemory(), AcquireStringInfo(), _SignatureInfo::blocksize, _SignatureInfo::digest, _SignatureInfo::digestsize, InitializeSignature(), _SignatureInfo::lsb_first, MagickFalse, MagickSignature, MagickTrue, _SignatureInfo::message, ResetMagickMemory(), ResourceLimitFatalError, _SignatureInfo::signature, SignatureBlocksize, SignatureDigestsize, ThrowFatalException, and _SignatureInfo::timestamp.

Referenced by SignatureImage().

static unsigned int Ch ( unsigned int  x, unsigned int  y, unsigned int  z  )

inlinestatic

Referenced by TransformSignature().

MagickExport SignatureInfo* DestroySignatureInfo

(

SignatureInfo *

signature_info

)

References _SignatureInfo::accumulator, DestroyStringInfo(), _SignatureInfo::digest, GetMagickModule, LogMagickEvent(), MagickSignature, _SignatureInfo::message, RelinquishMagickMemory(), _SignatureInfo::signature, and TraceEvent.

Referenced by AcquireRandomInfo(), DestroyRandomInfo(), HashStringInfoType(), HashStringType(), and SignatureImage().

MagickExport void FinalizeSignature

(

SignatureInfo *

signature_info

)

References _SignatureInfo::accumulator, _SignatureInfo::digest, GetMagickModule, GetStringInfoDatum(), GetStringInfoLength(), _SignatureInfo::high_order, LogMagickEvent(), _SignatureInfo::low_order, MagickSignature, _SignatureInfo::message, ResetMagickMemory(), _SignatureInfo::signature, SignatureDigestsize, TraceEvent, and TransformSignature().

Referenced by SignatureImage().

MagickExport unsigned int GetSignatureBlocksize

(

const SignatureInfo *

signature_info

)

References _SignatureInfo::blocksize, GetMagickModule, LogMagickEvent(), MagickSignature, _SignatureInfo::signature, and TraceEvent.

MagickExport const StringInfo* GetSignatureDigest

(

const SignatureInfo *

signature_info

)

References _SignatureInfo::digest, GetMagickModule, LogMagickEvent(), MagickSignature, _SignatureInfo::signature, and TraceEvent.

Referenced by AcquireRandomInfo(), HashStringInfoType(), HashStringType(), SetRandomKey(), and SignatureImage().

MagickExport unsigned int GetSignatureDigestsize

(

const SignatureInfo *

signature_info

)

References _SignatureInfo::digestsize, GetMagickModule, LogMagickEvent(), MagickSignature, _SignatureInfo::signature, and TraceEvent.

Referenced by AcquireRandomInfo(), and SetRandomKey().

MagickExport void InitializeSignature

(

SignatureInfo *

signature_info

)

References _SignatureInfo::accumulator, GetMagickModule, _SignatureInfo::high_order, LogMagickEvent(), _SignatureInfo::low_order, MagickSignature, _SignatureInfo::offset, _SignatureInfo::signature, and TraceEvent.

Referenced by AcquireSignatureInfo().

static unsigned int Maj ( unsigned int  x, unsigned int  y, unsigned int  z  )

inlinestatic

Referenced by TransformSignature().

static unsigned int RotateRight ( unsigned int  x, unsigned int  n  )

static

References Trunc32().

MagickExport void SetSignatureDigest	(	SignatureInfo *	signature_info,
		const StringInfo *	digest
	)

References _SignatureInfo::digest, MagickSignature, SetStringInfo(), and _SignatureInfo::signature.

MagickExport MagickBooleanType SignatureImage

(

Image *

image

)

References AcquireQuantumInfo(), AcquireSignatureInfo(), AcquireStringInfo(), AcquireVirtualCacheView(), CMYKAQuantum, CMYKColorspace, CMYKQuantum, _Image::colorspace, _Image::columns, _Image::debug, DeleteImageProperty(), DestroyCacheView(), DestroyQuantumInfo(), DestroySignatureInfo(), DestroyString(), DestroyStringInfo(), _Image::exception, ExportQuantumPixels(), _QuantumInfo::extent, _Image::filename, FinalizeSignature(), GetCacheViewVirtualPixels(), GetMagickModule, GetQuantumPixels(), GetSignatureDigest(), LogMagickEvent(), MagickFalse, MagickSignature, MagickTrue, _Image::matte, ResourceLimitError, RGBAQuantum, RGBQuantum, _Image::rows, SetImageProperty(), SetStringInfoDatum(), SetStringInfoLength(), _Image::signature, StringInfoToHexString(), ThrowBinaryException, TraceEvent, and UpdateSignature().

Referenced by GetMagickPropertyLetter(), and IdentifyImage().

static void TransformSignature ( SignatureInfo *  signature_info )

static

References _SignatureInfo::accumulator, Ch(), DisableMSCWarning, GetStringInfoDatum(), _SignatureInfo::lsb_first, MagickFalse, Maj(), _SignatureInfo::message, ResetMagickMemory(), RestoreMSCWarning, Sigma0, Sigma1, Suma0, Suma1, and Trunc32().

Referenced by FinalizeSignature(), and UpdateSignature().

static unsigned int Trunc32 ( unsigned int  x )

inlinestatic

Referenced by RotateRight(), TransformSignature(), and UpdateSignature().

MagickExport void UpdateSignature	(	SignatureInfo *	signature_info,
		const StringInfo *	message
	)

References CopyMagickMemory(), GetStringInfoDatum(), GetStringInfoLength(), _SignatureInfo::high_order, _SignatureInfo::low_order, MagickSignature, _SignatureInfo::message, _SignatureInfo::offset, SetStringInfoDatum(), _SignatureInfo::signature, TransformSignature(), and Trunc32().

Referenced by AcquireRandomInfo(), HashStringInfoType(), HashStringType(), SetRandomKey(), and SignatureImage().