MagickCore  6.9.11
Data Structures | Macros | Functions
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 "magick/timer-private.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 Ch(x, y, z)   (((x) & (y)) ^ (~(x) & (z)))
 
#define Maj(x, y, z)   (((x) & (y)) ^ ((x) & (z)) ^ ((y) & (z)))
 
#define RotateRight(x, n)   (Trunc32(((x) >> n) | ((x) << (32-n))))
 
#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))
 
#define Trunc32(x)   ((unsigned int) ((x) & 0xffffffffU))
 

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

Macro Definition Documentation

◆ Ch

#define Ch (   x,
  y,
  z 
)    (((x) & (y)) ^ (~(x) & (z)))

Referenced by TransformSignature().

◆ Maj

#define Maj (   x,
  y,
  z 
)    (((x) & (y)) ^ ((x) & (z)) ^ ((y) & (z)))

Referenced by TransformSignature().

◆ RotateRight

#define RotateRight (   x,
  n 
)    (Trunc32(((x) >> n) | ((x) << (32-n))))

◆ Sigma0

#define Sigma0 (   x)    (RotateRight(x,7) ^ RotateRight(x,18) ^ Trunc32((x) >> 3))

Referenced by TransformSignature().

◆ Sigma1

#define Sigma1 (   x)    (RotateRight(x,17) ^ RotateRight(x,19) ^ Trunc32((x) >> 10))

Referenced by TransformSignature().

◆ SignatureBlocksize

#define SignatureBlocksize   64

Definition at line 58 of file signature.c.

Referenced by AcquireSignatureInfo().

◆ SignatureDigestsize

#define SignatureDigestsize   32

Definition at line 59 of file signature.c.

Referenced by AcquireSignatureInfo(), and FinalizeSignature().

◆ Suma0

#define Suma0 (   x)    (RotateRight(x,2) ^ RotateRight(x,13) ^ RotateRight(x,22))

Referenced by TransformSignature().

◆ Suma1

#define Suma1 (   x)    (RotateRight(x,6) ^ RotateRight(x,11) ^ RotateRight(x,25))

Referenced by TransformSignature().

◆ Trunc32

#define Trunc32 (   x)    ((unsigned int) ((x) & 0xffffffffU))

Referenced by TransformSignature(), and UpdateSignature().

Function Documentation

◆ AcquireSignatureInfo()

MagickExport SignatureInfo* AcquireSignatureInfo ( void  )

Definition at line 116 of file signature.c.

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

Referenced by SignatureImage().

◆ DestroySignatureInfo()

MagickExport SignatureInfo* DestroySignatureInfo ( SignatureInfo *  signature_info)

Definition at line 170 of file signature.c.

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

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

◆ FinalizeSignature()

MagickExport void FinalizeSignature ( SignatureInfo *  signature_info)

Definition at line 209 of file signature.c.

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

Referenced by SignatureImage().

◆ GetSignatureBlocksize()

MagickExport unsigned int GetSignatureBlocksize ( const SignatureInfo *  signature_info)

Definition at line 295 of file signature.c.

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

◆ GetSignatureDigest()

MagickExport const StringInfo* GetSignatureDigest ( const SignatureInfo *  signature_info)

Definition at line 326 of file signature.c.

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

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

◆ GetSignatureDigestsize()

MagickExport unsigned int GetSignatureDigestsize ( const SignatureInfo *  signature_info)

Definition at line 357 of file signature.c.

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

Referenced by AcquireRandomInfo(), and SetRandomKey().

◆ InitializeSignature()

MagickExport void InitializeSignature ( SignatureInfo *  signature_info)

Definition at line 388 of file signature.c.

References _SignatureInfo::accumulator, _SignatureInfo::extent, GetMagickModule, _SignatureInfo::high_order, LogMagickEvent(), _SignatureInfo::low_order, MagickCoreSignature, _SignatureInfo::signature, and TraceEvent.

Referenced by AcquireSignatureInfo().

◆ SetSignatureDigest()

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

Definition at line 431 of file signature.c.

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

◆ SignatureImage()

MagickExport MagickBooleanType SignatureImage ( Image *  image)

Definition at line 467 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(), MagickCoreSignature, MagickFalse, MagickTrue, _Image::matte, ResourceLimitError, RGBAQuantum, RGBQuantum, _Image::rows, SetImageProperty(), SetStringInfoDatum(), SetStringInfoLength(), _Image::signature, StringInfoToHexString(), ThrowBinaryException, TraceEvent, and UpdateSignature().

Referenced by GetMagickPropertyLetter(), and IdentifyImage().

◆ TransformSignature()

static void TransformSignature ( SignatureInfo *  signature_info)
static

Definition at line 575 of file signature.c.

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

Referenced by FinalizeSignature(), and UpdateSignature().

◆ UpdateSignature()

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

Definition at line 750 of file signature.c.

References _SignatureInfo::extent, GetStringInfoDatum(), GetStringInfoLength(), _SignatureInfo::high_order, _SignatureInfo::low_order, MagickCoreSignature, _SignatureInfo::message, SetStringInfoDatum(), _SignatureInfo::signature, TransformSignature(), and Trunc32.

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