iaik.xml.crypto.alg.signature

Class ECDSAProxySignature

java.lang.Object

java.security.SignatureSpi

iaik.xml.crypto.alg.signature.ProxySignature

iaik.xml.crypto.alg.signature.ECDSAProxySignature

Direct Known Subclasses:

RIPEMD160withECDSAProxySignature, SHA224withECDSAProxySignature, SHA256withECDSAProxySignature, SHA384withECDSAProxySignature, SHA512withECDSAProxySignature

public class ECDSAProxySignature
extends ProxySignature

This Signature implements the ECDSA signature method as specified in RFC4051, Section 2.3.6.

Field Summary

Fields inherited from class iaik.xml.crypto.alg.signature.ProxySignature

signature_

Fields inherited from class java.security.SignatureSpi

appRandom

Constructor Summary

Constructors

Constructor and Description
ECDSAProxySignature() Creates a new instance of this ECDSAProxySignature.

Method Summary

Modifier and Type	Method and Description
protected byte[]	engineSign()
protected boolean	engineVerify(byte[] sigBytes)
protected String	getSignatureName() Returns an instance of the signature engine used to delegate all cryptographic operations to.
static byte[]	unsignedBigIntergerToByteArray(BigInteger bigInteger) Convert a BigInteger to a byte-array, but treat the byte-array given from the BigInteger as unsigned and removing any leading zero bytes; e.g.

Methods inherited from class iaik.xml.crypto.alg.signature.ProxySignature

engineGetParameter, engineGetParameters, engineInitSign, engineInitSign, engineInitVerify, engineSetParameter, engineSetParameter, engineSign, engineUpdate, engineUpdate, engineUpdate, engineVerify, getInstance, getInstanceUncaught

Methods inherited from class java.security.SignatureSpi

clone

Methods inherited from class java.lang.Object

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

Constructor Detail

ECDSAProxySignature

public ECDSAProxySignature()
                    throws NoSuchAlgorithmException,
                           NoSuchProviderException

Creates a new instance of this ECDSAProxySignature.

Throws:

NoSuchAlgorithmException

NoSuchProviderException

Method Detail

getSignatureName

protected String getSignatureName()

Description copied from class: ProxySignature

Returns an instance of the signature engine used to delegate all cryptographic operations to.

Specified by:

getSignatureName in class ProxySignature

Returns:

an instance of the signature engine

See Also:

ProxySignature.getSignatureName()

engineSign

protected byte[] engineSign()
                     throws SignatureException

Overrides:

engineSign in class ProxySignature

Throws:

SignatureException

See Also:

SignatureSpi.engineSign()

engineVerify

protected boolean engineVerify(byte[] sigBytes)
                        throws SignatureException

Overrides:

engineVerify in class ProxySignature

Throws:

SignatureException

See Also:

SignatureSpi.engineVerify(byte[])

unsignedBigIntergerToByteArray

public static byte[] unsignedBigIntergerToByteArray(BigInteger bigInteger)

Convert a BigInteger to a byte-array, but treat the byte-array given from the BigInteger as unsigned and removing any leading zero bytes; e.g. a 1024 bit integer with its highest bit set will result in an 128 byte array.

Parameters:

bigInteger - The BigInteger to convert.

Returns:

The byte-array representation of the BigInterger without signum-bit (i.e. removes any leading zero byte). null, if the BigInteger is null.