SiDSA Class Reference

This class implements the DSA public key crypto algorithms. More...

Inheritance diagram for SiDSA:

List of all members.

Public Member Functions
	SiDSA (DSA *key)
	constructor
virtual	~SiDSA ()
	destructor
virtual OFCondition	sign (const unsigned char *inputHash, unsigned long inputHashSize, E_MACType inputHashAlgorithm, unsigned char *outputSignature, unsigned long &outputSignatureSize)
	creates a signature.
virtual OFCondition	verify (const unsigned char *inputHash, unsigned long inputHashSize, E_MACType inputHashAlgorithm, const unsigned char *inputSignature, unsigned long inputSignatureSize, OFBool &verified)
	verifies a signature.
virtual unsigned long	getSize () const
	returns the size of a block of encrypted/decrypted ciphertext in bytes.
virtual E_KeyType	keyType () const
	returns the type of public key algorithm computed by this object
Private Member Functions
	SiDSA (SiDSA &arg)
	private undefined copy constructor
SiDSA &	operator= (SiDSA &arg)
	private undefined copy assignment operator
Private Attributes
DSA *	dsa
	DSA key used for signature/verification.

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Detailed Description

This class implements the DSA public key crypto algorithms.

Definition at line 49 of file sidsa.h.

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Constructor & Destructor Documentation

SiDSA::SiDSA

(

DSA *

key

)

constructor

Parameters:

pointer

to public DSA key

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Member Function Documentation

virtual OFCondition SiDSA::sign	(	const unsigned char *	inputHash,
		unsigned long	inputHashSize,
		E_MACType	inputHashAlgorithm,
		unsigned char *	outputSignature,
		unsigned long &	outputSignatureSize
	)			[virtual]

creates a signature.

Parameters:

	inputHash	array of hash key bytes that are to be signed
	inputHashSize	length of hash key array in bytes
	inputHashAlgorithm	MAC algorithm used for creation of hash key. Ignored for DSA signatures.
	outputSignature	pointer to array of at least getSize() which must be allocated by caller.
	outputSignatureSize	returns the number of bytes written to outputSignature.

Returns:

SI_EC_Normal if successful, errorcode otherwise.

Implements SiAlgorithm.

virtual OFCondition SiDSA::verify	(	const unsigned char *	inputHash,
		unsigned long	inputHashSize,
		E_MACType	inputHashAlgorithm,
		const unsigned char *	inputSignature,
		unsigned long	inputSignatureSize,
		OFBool &	verified
	)			[virtual]

verifies a signature.

Parameters:

	inputHash	array of bytes containing hash key to be verified against signature
	inputHashSize	length of hash key array in bytes
	inputHashAlgorithm	MAC algorithm used for creation of hash key. Ignored for DSA signatures.
	inputSignature	array of bytes containing signature to be verified
	inputSignatureSize	length of signature array in bytes
	verified	returns whether the signature was successfully verified

Returns:

SI_EC_Normal if successful, errorcode otherwise.

Implements SiAlgorithm.

virtual unsigned long SiDSA::getSize

(

)

const [virtual]

returns the size of a block of encrypted/decrypted ciphertext in bytes.

The result depends on the public key algorithm, key size and padding scheme. In general the input to decrypt() or encrypt() must be less than or equal to this block size. The output of decrypt() or encrypt() is always equal to this block size.

Returns:

block size for this public key cryptosystem and key

Implements SiAlgorithm.

virtual E_KeyType SiDSA::keyType

(

)

const [virtual]

returns the type of public key algorithm computed by this object

Returns:

type of public key algorithm

Implements SiAlgorithm.

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

• dcmsign/include/dcmtk/dcmsign/sidsa.h

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Generated on 6 Jan 2011 for OFFIS DCMTK Version 3.6.0 by Doxygen 1.5.1