COM.claymoresystems.provider

Class DSASignature

java.lang.Object

java.security.SignatureSpi

java.security.Signature

COM.claymoresystems.provider.RawDSASignature

COM.claymoresystems.provider.DSASignature

public class DSASignature
extends RawDSASignature

Field Summary

Fields inherited from class java.security.Signature

SIGN, state, UNINITIALIZED, VERIFY

Fields inherited from class java.security.SignatureSpi

appRandom

Constructor Summary

Constructors

Constructor and Description
DSASignature()

Method Summary

Methods

Modifier and Type	Method and Description
protected void	engineInitSign(java.security.PrivateKey key) SPI: Initializes this object for signing using the private key
protected void	engineInitVerify(java.security.PublicKey key) SPI: Initializes this object for verification using the given key
protected byte[]	engineSign() Sign the input, following FIPS-186.
protected void	engineUpdate(byte b) SPI: Single byte update
protected void	engineUpdate(byte[] b, int off, int len) SPI: Update with a buffer
protected boolean	engineVerify(byte[] signature) SPI: Raw Verify

Methods inherited from class COM.claymoresystems.provider.RawDSASignature

engineGetParameter, engineSetParameter

Methods inherited from class java.security.Signature

clone, getAlgorithm, getInstance, getInstance, getInstance, getParameter, getParameters, getProvider, initSign, initSign, initVerify, initVerify, setParameter, setParameter, sign, sign, toString, update, update, update, update, verify, verify

Methods inherited from class java.security.SignatureSpi

engineGetParameters, engineInitSign, engineSetParameter, engineSign, engineUpdate, engineVerify

Methods inherited from class java.lang.Object

equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

DSASignature

public DSASignature()

Method Detail

engineInitVerify

protected void engineInitVerify(java.security.PublicKey key)
                         throws java.security.InvalidKeyException

SPI: Initializes this object for verification using the given key

Overrides:

engineInitVerify in class RawDSASignature

Parameters:

key - the public key

Throws:

java.security.InvalidKeyException - if the key class doesn't implement DSAPublicKey

engineInitSign

protected void engineInitSign(java.security.PrivateKey key)
                       throws java.security.InvalidKeyException

SPI: Initializes this object for signing using the private key

Overrides:

engineInitSign in class RawDSASignature

Parameters:

key - the private key

Throws:

java.security.InvalidKeyException - if the key class doesn't implement than DSAPrivateKey

engineUpdate

protected void engineUpdate(byte b)
                     throws java.security.SignatureException

SPI: Single byte update

Overrides:

engineUpdate in class RawDSASignature

Throws:

java.security.SignatureException - in case of error

engineUpdate

protected void engineUpdate(byte[] b,
                int off,
                int len)
                     throws java.security.SignatureException

SPI: Update with a buffer

Overrides:

engineUpdate in class RawDSASignature

Parameters:

b - the buffer containing the digest

off - the offset into the buffer

len - the length (must be 20)

Throws:

java.security.SignatureException - in case of error

engineSign

protected byte[] engineSign()
                     throws java.security.SignatureException

Sign the input, following FIPS-186. The signature is encoded following ANSI X9.57: DSSSignature ::= SEQUENCE { r INTEGER, s INTEGER }

Overrides:

engineSign in class RawDSASignature

Throws:

java.security.SignatureException - if the engine isn't initialized properly

engineVerify

protected boolean engineVerify(byte[] signature)
                        throws java.security.SignatureException

SPI: Raw Verify

Overrides:

engineVerify in class RawDSASignature

Throws:

java.security.SignatureException - bad input