SiDSA Class Reference

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

Inheritance diagram for SiDSA:

Public Member Functions
	SiDSA (DSA *key)
	constructor More...
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. More...
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. More...
virtual unsigned long	getSize () const
	returns the size of a block of encrypted/decrypted ciphertext in bytes. More...
virtual E_KeyType	keyType () const
	returns the type of public key algorithm computed by this object More...
Public Member Functions inherited from SiAlgorithm
	SiAlgorithm ()
	default constructor
virtual	~SiAlgorithm ()
	destructor

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.

Detailed Description

This class implements the DSA public key crypto algorithms.

Remarks

This class is only available if DCMTK is compiled with OpenSSL support enabled.

Constructor & Destructor Documentation

SiDSA()

SiDSA::SiDSA

(

DSA *

key

)

constructor

Parameters

pointer

to public DSA key

Member Function Documentation

getSize()

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.

keyType()

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.

sign()

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.

verify()

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.

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

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