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Apache XML Security for Java supports XML-Signature Syntax and Processing,
W3C Recommendation 12 February 2002, and XML Encryption Syntax and
Processing, W3C Recommendation 10 December 2002. As of version 1.4,
the library supports the standard Java API JSR-105: XML Digital Signature APIs.
/**
* 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 org.apache.xml.security.algorithms.implementations;
import java.security.InvalidAlgorithmParameterException;
import java.security.InvalidKeyException;
import java.security.Key;
import java.security.SecureRandom;
import java.security.spec.AlgorithmParameterSpec;
import javax.crypto.Mac;
import javax.crypto.SecretKey;
import org.apache.xml.security.algorithms.JCEMapper;
import org.apache.xml.security.algorithms.MessageDigestAlgorithm;
import org.apache.xml.security.algorithms.SignatureAlgorithmSpi;
import org.apache.xml.security.signature.XMLSignature;
import org.apache.xml.security.signature.XMLSignatureException;
import org.apache.xml.security.utils.Constants;
import org.apache.xml.security.utils.XMLUtils;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.Text;
public abstract class IntegrityHmac extends SignatureAlgorithmSpi {
/** {@link org.apache.commons.logging} logging facility */
private static org.apache.commons.logging.Log log =
org.apache.commons.logging.LogFactory.getLog(IntegrityHmac.class);
/** Field macAlgorithm */
private Mac macAlgorithm = null;
/** Field HMACOutputLength */
private int HMACOutputLength = 0;
private boolean HMACOutputLengthSet = false;
/**
* Method engineGetURI
*
*@inheritDoc
*/
public abstract String engineGetURI();
/**
* Returns the output length of the hash/digest.
*/
abstract int getDigestLength();
/**
* Method IntegrityHmac
*
* @throws XMLSignatureException
*/
public IntegrityHmac() throws XMLSignatureException {
String algorithmID = JCEMapper.translateURItoJCEID(this.engineGetURI());
if (log.isDebugEnabled()) {
log.debug("Created IntegrityHmacSHA1 using " + algorithmID);
}
try {
this.macAlgorithm = Mac.getInstance(algorithmID);
} catch (java.security.NoSuchAlgorithmException ex) {
Object[] exArgs = { algorithmID, ex.getLocalizedMessage() };
throw new XMLSignatureException("algorithms.NoSuchAlgorithm", exArgs);
}
}
/**
* Proxy method for {@link java.security.Signature#setParameter(
* java.security.spec.AlgorithmParameterSpec)}
* which is executed on the internal {@link java.security.Signature} object.
*
* @param params
* @throws XMLSignatureException
*/
protected void engineSetParameter(AlgorithmParameterSpec params) throws XMLSignatureException {
throw new XMLSignatureException("empty");
}
public void reset() {
HMACOutputLength = 0;
HMACOutputLengthSet = false;
this.macAlgorithm.reset();
}
/**
* Proxy method for {@link java.security.Signature#verify(byte[])}
* which is executed on the internal {@link java.security.Signature} object.
*
* @param signature
* @return true if the signature is correct
* @throws XMLSignatureException
*/
protected boolean engineVerify(byte[] signature) throws XMLSignatureException {
try {
if (this.HMACOutputLengthSet && this.HMACOutputLength < getDigestLength()) {
if (log.isDebugEnabled()) {
log.debug("HMACOutputLength must not be less than " + getDigestLength());
}
Object[] exArgs = { String.valueOf(getDigestLength()) };
throw new XMLSignatureException("algorithms.HMACOutputLengthMin", exArgs);
} else {
byte[] completeResult = this.macAlgorithm.doFinal();
return MessageDigestAlgorithm.isEqual(completeResult, signature);
}
} catch (IllegalStateException ex) {
throw new XMLSignatureException("empty", ex);
}
}
/**
* Proxy method for {@link java.security.Signature#initVerify(java.security.PublicKey)}
* which is executed on the internal {@link java.security.Signature} object.
*
* @param secretKey
* @throws XMLSignatureException
*/
protected void engineInitVerify(Key secretKey) throws XMLSignatureException {
if (!(secretKey instanceof SecretKey)) {
String supplied = secretKey.getClass().getName();
String needed = SecretKey.class.getName();
Object exArgs[] = { supplied, needed };
throw new XMLSignatureException("algorithms.WrongKeyForThisOperation", exArgs);
}
try {
this.macAlgorithm.init(secretKey);
} catch (InvalidKeyException ex) {
// reinstantiate Mac object to work around bug in JDK
// see: http://bugs.sun.com/view_bug.do?bug_id=4953555
Mac mac = this.macAlgorithm;
try {
this.macAlgorithm = Mac.getInstance(macAlgorithm.getAlgorithm());
} catch (Exception e) {
// this shouldn't occur, but if it does, restore previous Mac
if (log.isDebugEnabled()) {
log.debug("Exception when reinstantiating Mac:" + e);
}
this.macAlgorithm = mac;
}
throw new XMLSignatureException("empty", ex);
}
}
/**
* Proxy method for {@link java.security.Signature#sign()}
* which is executed on the internal {@link java.security.Signature} object.
*
* @return the result of the {@link java.security.Signature#sign()} method
* @throws XMLSignatureException
*/
protected byte[] engineSign() throws XMLSignatureException {
try {
if (this.HMACOutputLengthSet && this.HMACOutputLength < getDigestLength()) {
if (log.isDebugEnabled()) {
log.debug("HMACOutputLength must not be less than " + getDigestLength());
}
Object[] exArgs = { String.valueOf(getDigestLength()) };
throw new XMLSignatureException("algorithms.HMACOutputLengthMin", exArgs);
} else {
return this.macAlgorithm.doFinal();
}
} catch (IllegalStateException ex) {
throw new XMLSignatureException("empty", ex);
}
}
/**
* Method engineInitSign
*
* @param secretKey
* @throws XMLSignatureException
*/
protected void engineInitSign(Key secretKey) throws XMLSignatureException {
if (!(secretKey instanceof SecretKey)) {
String supplied = secretKey.getClass().getName();
String needed = SecretKey.class.getName();
Object exArgs[] = { supplied, needed };
throw new XMLSignatureException("algorithms.WrongKeyForThisOperation", exArgs);
}
try {
this.macAlgorithm.init(secretKey);
} catch (InvalidKeyException ex) {
throw new XMLSignatureException("empty", ex);
}
}
/**
* Method engineInitSign
*
* @param secretKey
* @param algorithmParameterSpec
* @throws XMLSignatureException
*/
protected void engineInitSign(
Key secretKey, AlgorithmParameterSpec algorithmParameterSpec
) throws XMLSignatureException {
if (!(secretKey instanceof SecretKey)) {
String supplied = secretKey.getClass().getName();
String needed = SecretKey.class.getName();
Object exArgs[] = { supplied, needed };
throw new XMLSignatureException("algorithms.WrongKeyForThisOperation", exArgs);
}
try {
this.macAlgorithm.init(secretKey, algorithmParameterSpec);
} catch (InvalidKeyException ex) {
throw new XMLSignatureException("empty", ex);
} catch (InvalidAlgorithmParameterException ex) {
throw new XMLSignatureException("empty", ex);
}
}
/**
* Method engineInitSign
*
* @param secretKey
* @param secureRandom
* @throws XMLSignatureException
*/
protected void engineInitSign(Key secretKey, SecureRandom secureRandom)
throws XMLSignatureException {
throw new XMLSignatureException("algorithms.CannotUseSecureRandomOnMAC");
}
/**
* Proxy method for {@link java.security.Signature#update(byte[])}
* which is executed on the internal {@link java.security.Signature} object.
*
* @param input
* @throws XMLSignatureException
*/
protected void engineUpdate(byte[] input) throws XMLSignatureException {
try {
this.macAlgorithm.update(input);
} catch (IllegalStateException ex) {
throw new XMLSignatureException("empty", ex);
}
}
/**
* Proxy method for {@link java.security.Signature#update(byte)}
* which is executed on the internal {@link java.security.Signature} object.
*
* @param input
* @throws XMLSignatureException
*/
protected void engineUpdate(byte input) throws XMLSignatureException {
try {
this.macAlgorithm.update(input);
} catch (IllegalStateException ex) {
throw new XMLSignatureException("empty", ex);
}
}
/**
* Proxy method for {@link java.security.Signature#update(byte[], int, int)}
* which is executed on the internal {@link java.security.Signature} object.
*
* @param buf
* @param offset
* @param len
* @throws XMLSignatureException
*/
protected void engineUpdate(byte buf[], int offset, int len) throws XMLSignatureException {
try {
this.macAlgorithm.update(buf, offset, len);
} catch (IllegalStateException ex) {
throw new XMLSignatureException("empty", ex);
}
}
/**
* Method engineGetJCEAlgorithmString
* @inheritDoc
*
*/
protected String engineGetJCEAlgorithmString() {
return this.macAlgorithm.getAlgorithm();
}
/**
* Method engineGetJCEAlgorithmString
*
* @inheritDoc
*/
protected String engineGetJCEProviderName() {
return this.macAlgorithm.getProvider().getName();
}
/**
* Method engineSetHMACOutputLength
*
* @param HMACOutputLength
*/
protected void engineSetHMACOutputLength(int HMACOutputLength) {
this.HMACOutputLength = HMACOutputLength;
this.HMACOutputLengthSet = true;
}
/**
* Method engineGetContextFromElement
*
* @param element
*/
protected void engineGetContextFromElement(Element element) {
super.engineGetContextFromElement(element);
if (element == null) {
throw new IllegalArgumentException("element null");
}
Text hmaclength =
XMLUtils.selectDsNodeText(element.getFirstChild(), Constants._TAG_HMACOUTPUTLENGTH, 0);
if (hmaclength != null) {
this.HMACOutputLength = Integer.parseInt(hmaclength.getData());
this.HMACOutputLengthSet = true;
}
}
/**
* Method engineAddContextToElement
*
* @param element
*/
public void engineAddContextToElement(Element element) {
if (element == null) {
throw new IllegalArgumentException("null element");
}
if (this.HMACOutputLengthSet) {
Document doc = element.getOwnerDocument();
Element HMElem =
XMLUtils.createElementInSignatureSpace(doc, Constants._TAG_HMACOUTPUTLENGTH);
Text HMText =
doc.createTextNode(Integer.valueOf(this.HMACOutputLength).toString());
HMElem.appendChild(HMText);
XMLUtils.addReturnToElement(element);
element.appendChild(HMElem);
XMLUtils.addReturnToElement(element);
}
}
/**
* Class IntegrityHmacSHA1
*/
public static class IntegrityHmacSHA1 extends IntegrityHmac {
/**
* Constructor IntegrityHmacSHA1
*
* @throws XMLSignatureException
*/
public IntegrityHmacSHA1() throws XMLSignatureException {
super();
}
/**
* Method engineGetURI
* @inheritDoc
*
*/
public String engineGetURI() {
return XMLSignature.ALGO_ID_MAC_HMAC_SHA1;
}
int getDigestLength() {
return 160;
}
}
/**
* Class IntegrityHmacSHA256
*/
public static class IntegrityHmacSHA256 extends IntegrityHmac {
/**
* Constructor IntegrityHmacSHA256
*
* @throws XMLSignatureException
*/
public IntegrityHmacSHA256() throws XMLSignatureException {
super();
}
/**
* Method engineGetURI
*
* @inheritDoc
*/
public String engineGetURI() {
return XMLSignature.ALGO_ID_MAC_HMAC_SHA256;
}
int getDigestLength() {
return 256;
}
}
/**
* Class IntegrityHmacSHA384
*/
public static class IntegrityHmacSHA384 extends IntegrityHmac {
/**
* Constructor IntegrityHmacSHA384
*
* @throws XMLSignatureException
*/
public IntegrityHmacSHA384() throws XMLSignatureException {
super();
}
/**
* Method engineGetURI
* @inheritDoc
*
*/
public String engineGetURI() {
return XMLSignature.ALGO_ID_MAC_HMAC_SHA384;
}
int getDigestLength() {
return 384;
}
}
/**
* Class IntegrityHmacSHA512
*/
public static class IntegrityHmacSHA512 extends IntegrityHmac {
/**
* Constructor IntegrityHmacSHA512
*
* @throws XMLSignatureException
*/
public IntegrityHmacSHA512() throws XMLSignatureException {
super();
}
/**
* Method engineGetURI
* @inheritDoc
*
*/
public String engineGetURI() {
return XMLSignature.ALGO_ID_MAC_HMAC_SHA512;
}
int getDigestLength() {
return 512;
}
}
/**
* Class IntegrityHmacRIPEMD160
*/
public static class IntegrityHmacRIPEMD160 extends IntegrityHmac {
/**
* Constructor IntegrityHmacRIPEMD160
*
* @throws XMLSignatureException
*/
public IntegrityHmacRIPEMD160() throws XMLSignatureException {
super();
}
/**
* Method engineGetURI
*
* @inheritDoc
*/
public String engineGetURI() {
return XMLSignature.ALGO_ID_MAC_HMAC_RIPEMD160;
}
int getDigestLength() {
return 160;
}
}
/**
* Class IntegrityHmacMD5
*/
public static class IntegrityHmacMD5 extends IntegrityHmac {
/**
* Constructor IntegrityHmacMD5
*
* @throws XMLSignatureException
*/
public IntegrityHmacMD5() throws XMLSignatureException {
super();
}
/**
* Method engineGetURI
*
* @inheritDoc
*/
public String engineGetURI() {
return XMLSignature.ALGO_ID_MAC_HMAC_NOT_RECOMMENDED_MD5;
}
int getDigestLength() {
return 128;
}
}
}