Interface for message encoding method for public key signature schemes. More...

#include <pubkey.h>

Inheritance diagram for PK_SignatureMessageEncodingMethod:

Classes
struct	HashIdentifierLookup

Public Member Functions
virtual	~PK_SignatureMessageEncodingMethod ()

virtual size_t	MinRepresentativeBitLength (size_t hashIdentifierLength, size_t digestLength) const

virtual size_t	MaxRecoverableLength (size_t representativeBitLength, size_t hashIdentifierLength, size_t digestLength) const

bool	IsProbabilistic () const
	Determines whether an encoding method requires a random number generator. More...

bool	AllowNonrecoverablePart () const

virtual bool	RecoverablePartFirst () const

virtual void	ProcessSemisignature (HashTransformation &hash, const byte *semisignature, size_t semisignatureLength) const

virtual void	ProcessRecoverableMessage (HashTransformation &hash, const byte recoverableMessage, size_t recoverableMessageLength, const byte presignature, size_t presignatureLength, SecByteBlock &semisignature) const

virtual void	ComputeMessageRepresentative (RandomNumberGenerator &rng, const byte recoverableMessage, size_t recoverableMessageLength, HashTransformation &hash, HashIdentifier hashIdentifier, bool messageEmpty, byte representative, size_t representativeBitLength) const =0

virtual bool	VerifyMessageRepresentative (HashTransformation &hash, HashIdentifier hashIdentifier, bool messageEmpty, byte *representative, size_t representativeBitLength) const =0

virtual DecodingResult	RecoverMessageFromRepresentative (HashTransformation &hash, HashIdentifier hashIdentifier, bool messageEmpty, byte representative, size_t representativeBitLength, byte recoveredMessage) const

virtual DecodingResult	RecoverMessageFromSemisignature (HashTransformation &hash, HashIdentifier hashIdentifier, const byte presignature, size_t presignatureLength, const byte semisignature, size_t semisignatureLength, byte *recoveredMessage) const

Detailed Description

Interface for message encoding method for public key signature schemes.

PK_SignatureMessageEncodingMethod provides interfaces for message encoding method for public key signature schemes. The methods support both trapdoor functions (TF_*) and discrete logarithm (DL_*) based schemes.

Definition at line 322 of file pubkey.h.

Constructor & Destructor Documentation

virtual PK_SignatureMessageEncodingMethod::~PK_SignatureMessageEncodingMethod ( )

inlinevirtual

Definition at line 325 of file pubkey.h.

Member Function Documentation

bool PK_SignatureMessageEncodingMethod::AllowNonrecoverablePart ( ) const

inline

Definition at line 340 of file pubkey.h.

virtual void PK_SignatureMessageEncodingMethod::ComputeMessageRepresentative	(	RandomNumberGenerator &	rng,
		const byte *	recoverableMessage,
		size_t	recoverableMessageLength,
		HashTransformation &	hash,
		HashIdentifier	hashIdentifier,
		bool	messageEmpty,
		byte *	representative,
		size_t	representativeBitLength
	)		const

pure virtual

Implemented in DL_SignatureMessageEncodingMethod_NR, DL_SignatureMessageEncodingMethod_DSA, EMSA5Pad< T >, PKCS1v15_SignatureMessageEncodingMethod, EMSA2Pad, and PSSR_MEM_Base.

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bool PK_SignatureMessageEncodingMethod::IsProbabilistic ( ) const

inline

Determines whether an encoding method requires a random number generator.

Returns: true if the encoding method requires a RandomNumberGenerator()

if IsProbabilistic() returns false, then NullRNG() can be passed to functions that take RandomNumberGenerator().

See also: Bellare and RogawayPSS: Provably Secure Encoding Method for Digital Signatures

Definition at line 338 of file pubkey.h.

virtual size_t PK_SignatureMessageEncodingMethod::MaxRecoverableLength	(	size_t	representativeBitLength,
		size_t	hashIdentifierLength,
		size_t	digestLength
	)		const

inlinevirtual

Reimplemented in PSSR_MEM_Base.

Definition at line 329 of file pubkey.h.

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virtual size_t PK_SignatureMessageEncodingMethod::MinRepresentativeBitLength	(	size_t	hashIdentifierLength,
		size_t	digestLength
	)		const

inlinevirtual

Reimplemented in PKCS1v15_SignatureMessageEncodingMethod, EMSA2Pad, and PSSR_MEM_Base.

Definition at line 327 of file pubkey.h.

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virtual void PK_SignatureMessageEncodingMethod::ProcessRecoverableMessage	(	HashTransformation &	hash,
		const byte *	recoverableMessage,
		size_t	recoverableMessageLength,
		const byte *	presignature,
		size_t	presignatureLength,
		SecByteBlock &	semisignature
	)		const

inlinevirtual

Definition at line 350 of file pubkey.h.

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virtual void PK_SignatureMessageEncodingMethod::ProcessSemisignature	(	HashTransformation &	hash,
		const byte *	semisignature,
		size_t	semisignatureLength
	)		const

inlinevirtual

Definition at line 346 of file pubkey.h.

virtual bool PK_SignatureMessageEncodingMethod::RecoverablePartFirst ( ) const

inlinevirtual

Reimplemented in PSSR_MEM_Base.

Definition at line 342 of file pubkey.h.

virtual DecodingResult PK_SignatureMessageEncodingMethod::RecoverMessageFromRepresentative	(	HashTransformation &	hash,
		HashIdentifier	hashIdentifier,
		bool	messageEmpty,
		byte *	representative,
		size_t	representativeBitLength,
		byte *	recoveredMessage
	)		const

inlinevirtual

Reimplemented in PSSR_MEM_Base.

Definition at line 370 of file pubkey.h.

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virtual DecodingResult PK_SignatureMessageEncodingMethod::RecoverMessageFromSemisignature	(	HashTransformation &	hash,
		HashIdentifier	hashIdentifier,
		const byte *	presignature,
		size_t	presignatureLength,
		const byte *	semisignature,
		size_t	semisignatureLength,
		byte *	recoveredMessage
	)		const

inlinevirtual

Definition at line 378 of file pubkey.h.

virtual bool PK_SignatureMessageEncodingMethod::VerifyMessageRepresentative	(	HashTransformation &	hash,
		HashIdentifier	hashIdentifier,
		bool	messageEmpty,
		byte *	representative,
		size_t	representativeBitLength
	)		const

pure virtual

Implemented in PK_RecoverableSignatureMessageEncodingMethod, and PK_DeterministicSignatureMessageEncodingMethod.

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The documentation for this class was generated from the following file:

src/cryptopp/pubkey.h

Classes

Public Member Functions

Detailed Description

Constructor & Destructor Documentation

Member Function Documentation