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:

Go to the source code of this file.

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

Definition at line 58 of file signature.c.

Referenced by AcquireSignatureInfo().

#define SignatureDigestsize   32

Definition at line 59 of file signature.c.

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

)

Definition at line 119 of file signature.c.

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

Definition at line 584 of file signature.c.

Referenced by TransformSignature().

MagickExport SignatureInfo* DestroySignatureInfo

(

SignatureInfo *

signature_info

)

Definition at line 172 of file signature.c.

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

)

Definition at line 212 of file signature.c.

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

)

Definition at line 297 of file signature.c.

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

MagickExport const StringInfo* GetSignatureDigest

(

const SignatureInfo *

signature_info

)

Definition at line 329 of file signature.c.

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

)

Definition at line 361 of file signature.c.

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

Referenced by AcquireRandomInfo(), and SetRandomKey().

MagickExport void InitializeSignature

(

SignatureInfo *

signature_info

)

Definition at line 393 of file signature.c.

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

Definition at line 589 of file signature.c.

Referenced by TransformSignature().

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

static

Definition at line 599 of file signature.c.

References Trunc32().

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

Definition at line 437 of file signature.c.

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

MagickExport MagickBooleanType SignatureImage

(

Image *

image

)

Definition at line 474 of file signature.c.

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

Definition at line 604 of file signature.c.

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

Definition at line 594 of file signature.c.

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

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

Definition at line 776 of file signature.c.

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().