COM.claymoresystems.provider

Class RawDSASignature

java.lang.Object

java.security.SignatureSpi

java.security.Signature

COM.claymoresystems.provider.RawDSASignature

Direct Known Subclasses:

DSASignature

public class RawDSASignature
extends java.security.Signature

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
RawDSASignature()
RawDSASignature(java.lang.String name)

Method Summary

Methods

Modifier and Type	Method and Description
protected java.lang.Object	engineGetParameter(java.lang.String param) SPI: There aren't any parameters
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 void	engineSetParameter(java.lang.String param, java.lang.Object value) SPI: There aren't any parameters
protected byte[]	engineSign() Sign the input, following FIPS-186.
protected void	engineUpdate(byte b) SPI: Single byte updates are forbidden for Raw DSA.
protected void	engineUpdate(byte[] b, int off, int len) SPI: Updates the digest.
protected boolean	engineVerify(byte[] signature) SPI: Raw Verify

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

RawDSASignature

public RawDSASignature(java.lang.String name)

RawDSASignature

public RawDSASignature()

Method Detail

engineInitVerify

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

SPI: Initializes this object for verification using the given key

Specified by:

engineInitVerify in class java.security.SignatureSpi

Parameters:

key - the public key

Throws:

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

engineInitSign

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

SPI: Initializes this object for signing using the private key

Specified by:

engineInitSign in class java.security.SignatureSpi

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 updates are forbidden for Raw DSA.

Specified by:

engineUpdate in class java.security.SignatureSpi

Throws:

java.security.SignatureException - bad input

engineUpdate

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

SPI: Updates the digest. Since we're doing raw DSA, this must be a 20 byte string. This can only be called once with a single digest value or we throw an error

Specified by:

engineUpdate in class java.security.SignatureSpi

Parameters:

b - the buffer containing the digest

off - the offset into the buffer

len - the length (must be 20)

Throws:

java.security.SignatureException - either if the algorithm was improperly initialized or you try to call update more than once

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 }

Specified by:

engineSign in class java.security.SignatureSpi

Throws:

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

engineVerify

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

SPI: Raw Verify

Specified by:

engineVerify in class java.security.SignatureSpi

Throws:

java.security.SignatureException - bad input

engineSetParameter

protected void engineSetParameter(java.lang.String param,
                      java.lang.Object value)
                           throws java.security.InvalidParameterException

SPI: There aren't any parameters

Specified by:

engineSetParameter in class java.security.SignatureSpi

Throws:

java.security.InvalidParameterException

engineGetParameter

protected java.lang.Object engineGetParameter(java.lang.String param)
                                       throws java.security.InvalidParameterException

SPI: There aren't any parameters

Specified by:

engineGetParameter in class java.security.SignatureSpi

Throws:

java.security.InvalidParameterException