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	/*
	* reserved comment block
	* DO NOT REMOVE OR ALTER!
	*/
	/**
	* Licensed to the Apache Software Foundation (ASF) under one
	* or more contributor license agreements. See the NOTICE file
	* distributed with this work for additional information
	* regarding copyright ownership. The ASF licenses this file
	* to you under the Apache License, Version 2.0 (the
	* "License"); you may not use this file except in compliance
	* with the License. You may obtain a copy of the License at
	*
	* http://www.apache.org/licenses/LICENSE-2.0
	*
	* Unless required by applicable law or agreed to in writing,
	* software distributed under the License is distributed on an
	* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
	* KIND, either express or implied. See the License for the
	* specific language governing permissions and limitations
	* under the License.
	*/
	package com.sun.org.apache.xml.internal.security.algorithms.implementations;

	import java.io.IOException;
	import java.security.InvalidAlgorithmParameterException;
	import java.security.InvalidKeyException;
	import java.security.Key;
	import java.security.NoSuchProviderException;
	import java.security.PrivateKey;
	import java.security.PublicKey;
	import java.security.SecureRandom;
	import java.security.Signature;
	import java.security.SignatureException;
	import java.security.spec.AlgorithmParameterSpec;

	import com.sun.org.apache.xml.internal.security.algorithms.JCEMapper;
	import com.sun.org.apache.xml.internal.security.algorithms.SignatureAlgorithmSpi;
	import com.sun.org.apache.xml.internal.security.signature.XMLSignature;
	import com.sun.org.apache.xml.internal.security.signature.XMLSignatureException;
	import com.sun.org.apache.xml.internal.security.utils.XMLUtils;

	/**
	*
	*/
	public abstract class SignatureECDSA extends SignatureAlgorithmSpi {

	private static final com.sun.org.slf4j.internal.Logger LOG =
	com.sun.org.slf4j.internal.LoggerFactory.getLogger(SignatureECDSA.class);

	/** {@inheritDoc} */
	public abstract String engineGetURI();

	/** Field algorithm */
	private Signature signatureAlgorithm;

	/**
	* Converts an ASN.1 ECDSA value to a XML Signature ECDSA Value.
	*
	* The JAVA JCE ECDSA Signature algorithm creates ASN.1 encoded (r, s) value
	* pairs; the XML Signature requires the core BigInteger values.
	*
	* @param asn1Bytes
	* @return the decode bytes
	*
	* @throws IOException
	* @see <A HREF="http://www.w3.org/TR/xmldsig-core/#dsa-sha1">6.4.1 DSA</A>
	* @see <A HREF="ftp://ftp.rfc-editor.org/in-notes/rfc4050.txt">3.3. ECDSA Signatures</A>
	*/
	public static byte[] convertASN1toXMLDSIG(byte asn1Bytes[]) throws IOException {
	return ECDSAUtils.convertASN1toXMLDSIG(asn1Bytes);
	}

	/**
	* Converts a XML Signature ECDSA Value to an ASN.1 DSA value.
	*
	* The JAVA JCE ECDSA Signature algorithm creates ASN.1 encoded (r, s) value
	* pairs; the XML Signature requires the core BigInteger values.
	*
	* @param xmldsigBytes
	* @return the encoded ASN.1 bytes
	*
	* @throws IOException
	* @see <A HREF="http://www.w3.org/TR/xmldsig-core/#dsa-sha1">6.4.1 DSA</A>
	* @see <A HREF="ftp://ftp.rfc-editor.org/in-notes/rfc4050.txt">3.3. ECDSA Signatures</A>
	*/
	public static byte[] convertXMLDSIGtoASN1(byte xmldsigBytes[]) throws IOException {
	return ECDSAUtils.convertXMLDSIGtoASN1(xmldsigBytes);
	}

	/**
	* Constructor SignatureRSA
	*
	* @throws XMLSignatureException
	*/
	public SignatureECDSA() throws XMLSignatureException {

	String algorithmID = JCEMapper.translateURItoJCEID(this.engineGetURI());

	LOG.debug("Created SignatureECDSA using {}", algorithmID);
	String provider = JCEMapper.getProviderId();
	try {
	if (provider == null) {
	this.signatureAlgorithm = Signature.getInstance(algorithmID);
	} else {
	this.signatureAlgorithm = Signature.getInstance(algorithmID, provider);
	}
	} catch (java.security.NoSuchAlgorithmException ex) {
	Object[] exArgs = { algorithmID, ex.getLocalizedMessage() };

	throw new XMLSignatureException("algorithms.NoSuchAlgorithm", exArgs);
	} catch (NoSuchProviderException ex) {
	Object[] exArgs = { algorithmID, ex.getLocalizedMessage() };

	throw new XMLSignatureException("algorithms.NoSuchAlgorithm", exArgs);
	}
	}

	/** {@inheritDoc} */
	protected void engineSetParameter(AlgorithmParameterSpec params)
	throws XMLSignatureException {
	try {
	this.signatureAlgorithm.setParameter(params);
	} catch (InvalidAlgorithmParameterException ex) {
	throw new XMLSignatureException(ex);
	}
	}

	/** {@inheritDoc} */
	protected boolean engineVerify(byte[] signature) throws XMLSignatureException {
	try {
	byte[] jcebytes = SignatureECDSA.convertXMLDSIGtoASN1(signature);

	if (LOG.isDebugEnabled()) {
	LOG.debug("Called ECDSA.verify() on " + XMLUtils.encodeToString(signature));
	}

	return this.signatureAlgorithm.verify(jcebytes);
	} catch (SignatureException ex) {
	throw new XMLSignatureException(ex);
	} catch (IOException ex) {
	throw new XMLSignatureException(ex);
	}
	}

	/** {@inheritDoc} */
	protected void engineInitVerify(Key publicKey) throws XMLSignatureException {

	if (!(publicKey instanceof PublicKey)) {
	String supplied = null;
	if (publicKey != null) {
	supplied = publicKey.getClass().getName();
	}
	String needed = PublicKey.class.getName();
	Object exArgs[] = { supplied, needed };

	throw new XMLSignatureException("algorithms.WrongKeyForThisOperation", exArgs);
	}

	try {
	this.signatureAlgorithm.initVerify((PublicKey) publicKey);
	} catch (InvalidKeyException ex) {
	// reinstantiate Signature object to work around bug in JDK
	// see: http://bugs.sun.com/view_bug.do?bug_id=4953555
	Signature sig = this.signatureAlgorithm;
	try {
	this.signatureAlgorithm = Signature.getInstance(signatureAlgorithm.getAlgorithm());
	} catch (Exception e) {
	// this shouldn't occur, but if it does, restore previous
	// Signature
	LOG.debug("Exception when reinstantiating Signature: {}", e);
	this.signatureAlgorithm = sig;
	}
	throw new XMLSignatureException(ex);
	}
	}

	/** {@inheritDoc} */
	protected byte[] engineSign() throws XMLSignatureException {
	try {
	byte jcebytes[] = this.signatureAlgorithm.sign();

	return SignatureECDSA.convertASN1toXMLDSIG(jcebytes);
	} catch (SignatureException ex) {
	throw new XMLSignatureException(ex);
	} catch (IOException ex) {
	throw new XMLSignatureException(ex);
	}
	}

	/** {@inheritDoc} */
	protected void engineInitSign(Key privateKey, SecureRandom secureRandom)
	throws XMLSignatureException {
	if (!(privateKey instanceof PrivateKey)) {
	String supplied = null;
	if (privateKey != null) {
	supplied = privateKey.getClass().getName();
	}
	String needed = PrivateKey.class.getName();
	Object exArgs[] = { supplied, needed };

	throw new XMLSignatureException("algorithms.WrongKeyForThisOperation", exArgs);
	}

	try {
	if (secureRandom == null) {
	this.signatureAlgorithm.initSign((PrivateKey) privateKey);
	} else {
	this.signatureAlgorithm.initSign((PrivateKey) privateKey, secureRandom);
	}
	} catch (InvalidKeyException ex) {
	throw new XMLSignatureException(ex);
	}
	}

	/** {@inheritDoc} */
	protected void engineInitSign(Key privateKey) throws XMLSignatureException {
	engineInitSign(privateKey, (SecureRandom)null);
	}

	/** {@inheritDoc} */
	protected void engineUpdate(byte[] input) throws XMLSignatureException {
	try {
	this.signatureAlgorithm.update(input);
	} catch (SignatureException ex) {
	throw new XMLSignatureException(ex);
	}
	}

	/** {@inheritDoc} */
	protected void engineUpdate(byte input) throws XMLSignatureException {
	try {
	this.signatureAlgorithm.update(input);
	} catch (SignatureException ex) {
	throw new XMLSignatureException(ex);
	}
	}

	/** {@inheritDoc} */
	protected void engineUpdate(byte buf[], int offset, int len) throws XMLSignatureException {
	try {
	this.signatureAlgorithm.update(buf, offset, len);
	} catch (SignatureException ex) {
	throw new XMLSignatureException(ex);
	}
	}

	/** {@inheritDoc} */
	protected String engineGetJCEAlgorithmString() {
	return this.signatureAlgorithm.getAlgorithm();
	}

	/** {@inheritDoc} */
	protected String engineGetJCEProviderName() {
	return this.signatureAlgorithm.getProvider().getName();
	}

	/** {@inheritDoc} */
	protected void engineSetHMACOutputLength(int HMACOutputLength)
	throws XMLSignatureException {
	throw new XMLSignatureException("algorithms.HMACOutputLengthOnlyForHMAC");
	}

	/** {@inheritDoc} */
	protected void engineInitSign(
	Key signingKey, AlgorithmParameterSpec algorithmParameterSpec
	) throws XMLSignatureException {
	throw new XMLSignatureException("algorithms.CannotUseAlgorithmParameterSpecOnRSA");
	}

	/**
	* Class SignatureECDSASHA1
	*
	*/
	public static class SignatureECDSASHA1 extends SignatureECDSA {
	/**
	* Constructor SignatureECDSASHA1
	*
	* @throws XMLSignatureException
	*/
	public SignatureECDSASHA1() throws XMLSignatureException {
	super();
	}

	/** {@inheritDoc} */
	public String engineGetURI() {
	return XMLSignature.ALGO_ID_SIGNATURE_ECDSA_SHA1;
	}
	}

	/**
	* Class SignatureECDSASHA224
	*/
	public static class SignatureECDSASHA224 extends SignatureECDSA {

	/**
	* Constructor SignatureECDSASHA224
	*
	* @throws XMLSignatureException
	*/
	public SignatureECDSASHA224() throws XMLSignatureException {
	super();
	}

	/** {@inheritDoc} */
	public String engineGetURI() {
	return XMLSignature.ALGO_ID_SIGNATURE_ECDSA_SHA224;
	}
	}

	/**
	* Class SignatureECDSASHA256
	*
	*/
	public static class SignatureECDSASHA256 extends SignatureECDSA {

	/**
	* Constructor SignatureECDSASHA256
	*
	* @throws XMLSignatureException
	*/
	public SignatureECDSASHA256() throws XMLSignatureException {
	super();
	}

	/** {@inheritDoc} */
	public String engineGetURI() {
	return XMLSignature.ALGO_ID_SIGNATURE_ECDSA_SHA256;
	}
	}

	/**
	* Class SignatureECDSASHA384
	*
	*/
	public static class SignatureECDSASHA384 extends SignatureECDSA {

	/**
	* Constructor SignatureECDSASHA384
	*
	* @throws XMLSignatureException
	*/
	public SignatureECDSASHA384() throws XMLSignatureException {
	super();
	}

	/** {@inheritDoc} */
	public String engineGetURI() {
	return XMLSignature.ALGO_ID_SIGNATURE_ECDSA_SHA384;
	}
	}

	/**
	* Class SignatureECDSASHA512
	*
	*/
	public static class SignatureECDSASHA512 extends SignatureECDSA {

	/**
	* Constructor SignatureECDSASHA512
	*
	* @throws XMLSignatureException
	*/
	public SignatureECDSASHA512() throws XMLSignatureException {
	super();
	}

	/** {@inheritDoc} */
	public String engineGetURI() {
	return XMLSignature.ALGO_ID_SIGNATURE_ECDSA_SHA512;
	}
	}

	/**
	* Class SignatureECDSARIPEMD160
	*/
	public static class SignatureECDSARIPEMD160 extends SignatureECDSA {

	/**
	* Constructor SignatureECDSARIPEMD160
	*
	* @throws XMLSignatureException
	*/
	public SignatureECDSARIPEMD160() throws XMLSignatureException {
	super();
	}

	/** {@inheritDoc} */
	public String engineGetURI() {
	return XMLSignature.ALGO_ID_SIGNATURE_ECDSA_RIPEMD160;
	}
	}

	}

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