| /* |
| * The Apache Software License, Version 1.1 |
| * |
| * |
| * Copyright (c) 1999 The Apache Software Foundation. All rights |
| * reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in |
| * the documentation and/or other materials provided with the |
| * distribution. |
| * |
| * 3. The end-user documentation included with the redistribution, |
| * if any, must include the following acknowledgment: |
| * "This product includes software developed by the |
| * Apache Software Foundation (http://www.apache.org/)." |
| * Alternately, this acknowledgment may appear in the software itself, |
| * if and wherever such third-party acknowledgments normally appear. |
| * |
| * 4. The names "<WebSig>" and "Apache Software Foundation" must |
| * not be used to endorse or promote products derived from this |
| * software without prior written permission. For written |
| * permission, please contact apache@apache.org. |
| * |
| * 5. Products derived from this software may not be called "Apache", |
| * nor may "Apache" appear in their name, without prior written |
| * permission of the Apache Software Foundation. |
| * |
| * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED |
| * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
| * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR |
| * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF |
| * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND |
| * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, |
| * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT |
| * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| * SUCH DAMAGE. |
| * ==================================================================== |
| * |
| * This software consists of voluntary contributions made by many |
| * individuals on behalf of the Apache Software Foundation and was |
| * originally based on software copyright (c) 2001, Institute for |
| * Data Communications Systems, <http://www.nue.et-inf.uni-siegen.de/>. |
| * The development of this software was partly funded by the European |
| * Commission in the <WebSig> project in the ISIS Programme. |
| * For more information on the Apache Software Foundation, please see |
| * <http://www.apache.org/>. |
| */ |
| package org.apache.xml.security.algorithms.implementations; |
| |
| |
| |
| import java.io.IOException; |
| import java.security.InvalidAlgorithmParameterException; |
| import java.security.InvalidKeyException; |
| import java.security.Key; |
| 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 org.apache.xml.security.algorithms.JCEMapper; |
| import org.apache.xml.security.algorithms.SignatureAlgorithmSpi; |
| import org.apache.xml.security.signature.XMLSignatureException; |
| import org.apache.xml.security.utils.Base64; |
| import org.apache.xml.security.utils.Constants; |
| |
| |
| /** |
| * |
| * @author $Author$ |
| */ |
| public class SignatureDSA extends SignatureAlgorithmSpi { |
| |
| /** {@link org.apache.commons.logging} logging facility */ |
| static org.apache.commons.logging.Log log = |
| org.apache.commons.logging.LogFactory.getLog(SignatureDSA.class.getName()); |
| |
| /** Field _URI */ |
| public static final String _URI = Constants.SignatureSpecNS + "dsa-sha1"; |
| |
| /** Field algorithm */ |
| private java.security.Signature _signatureAlgorithm = null; |
| |
| /** |
| * Method engineGetURI |
| * |
| * |
| */ |
| protected String engineGetURI() { |
| return SignatureDSA._URI; |
| } |
| |
| /** |
| * Constructor SignatureDSA |
| * |
| * @throws XMLSignatureException |
| */ |
| public SignatureDSA() throws XMLSignatureException { |
| |
| JCEMapper.ProviderIdClass algorithmID = |
| JCEMapper.translateURItoJCEID(SignatureDSA._URI); |
| |
| log.debug("Created SignatureDSA using " + algorithmID.getAlgorithmID() |
| + " " + algorithmID.getProviderId()); |
| |
| try { |
| this._signatureAlgorithm = |
| Signature.getInstance(algorithmID.getAlgorithmID(), |
| algorithmID.getProviderId()); |
| } catch (java.security.NoSuchAlgorithmException ex) { |
| Object[] exArgs = { algorithmID.getAlgorithmID(), |
| ex.getLocalizedMessage() }; |
| |
| throw new XMLSignatureException("algorithms.NoSuchAlgorithm", exArgs); |
| } catch (java.security.NoSuchProviderException ex) { |
| Object[] exArgs = { algorithmID.getProviderId(), |
| ex.getLocalizedMessage() }; |
| |
| throw new XMLSignatureException("algorithms.NoSuchProvider", exArgs); |
| } |
| } |
| |
| /** |
| * Proxy method for {@link java.security.Signature#setParameter} |
| * which is executed on the internal {@link java.security.Signature} object. |
| * |
| * @param params |
| * @throws XMLSignatureException |
| */ |
| protected void engineSetParameter(AlgorithmParameterSpec params) |
| throws XMLSignatureException { |
| |
| try { |
| this._signatureAlgorithm.setParameter(params); |
| } catch (InvalidAlgorithmParameterException ex) { |
| throw new XMLSignatureException("empty", ex); |
| } |
| } |
| |
| /** |
| * Proxy method for {@link java.security.Signature#verify} |
| * which is executed on the internal {@link java.security.Signature} object. |
| * |
| * @param signature |
| * |
| * @throws XMLSignatureException |
| */ |
| protected boolean engineVerify(byte[] signature) |
| throws XMLSignatureException { |
| |
| try { |
| log.debug("Called DSA.verify() on " + Base64.encode(signature)); |
| |
| byte[] jcebytes = SignatureDSA.convertXMLDSIGtoASN1(signature); |
| |
| return this._signatureAlgorithm.verify(jcebytes); |
| } catch (SignatureException ex) { |
| throw new XMLSignatureException("empty", ex); |
| } catch (IOException ex) { |
| throw new XMLSignatureException("empty", ex); |
| } |
| } |
| |
| /** |
| * Proxy method for {@link java.security.Signature#initVerify} |
| * which is executed on the internal {@link java.security.Signature} object. |
| * |
| * @param publicKey |
| * @throws XMLSignatureException |
| */ |
| protected void engineInitVerify(Key publicKey) throws XMLSignatureException { |
| |
| if (!(publicKey instanceof PublicKey)) { |
| String 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) { |
| 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 { |
| byte jcebytes[] = this._signatureAlgorithm.sign(); |
| |
| return SignatureDSA.convertASN1toXMLDSIG(jcebytes); |
| } catch (IOException ex) { |
| throw new XMLSignatureException("empty", ex); |
| } catch (SignatureException ex) { |
| throw new XMLSignatureException("empty", ex); |
| } |
| } |
| |
| /** |
| * Proxy method for {@link java.security.Signature#initSign} |
| * which is executed on the internal {@link java.security.Signature} object. |
| * |
| * @param privateKey |
| * @param secureRandom |
| * @throws XMLSignatureException |
| */ |
| protected void engineInitSign(Key privateKey, SecureRandom secureRandom) |
| throws XMLSignatureException { |
| |
| if (!(privateKey instanceof PrivateKey)) { |
| String supplied = privateKey.getClass().getName(); |
| String needed = PrivateKey.class.getName(); |
| Object exArgs[] = { supplied, needed }; |
| |
| throw new XMLSignatureException("algorithms.WrongKeyForThisOperation", |
| exArgs); |
| } |
| |
| try { |
| this._signatureAlgorithm.initSign((PrivateKey) privateKey, |
| secureRandom); |
| } catch (InvalidKeyException ex) { |
| throw new XMLSignatureException("empty", ex); |
| } |
| } |
| |
| /** |
| * Proxy method for {@link java.security.Signature#initSign} |
| * which is executed on the internal {@link java.security.Signature} object. |
| * |
| * @param privateKey |
| * @throws XMLSignatureException |
| */ |
| protected void engineInitSign(Key privateKey) throws XMLSignatureException { |
| |
| if (!(privateKey instanceof PrivateKey)) { |
| String supplied = privateKey.getClass().getName(); |
| String needed = PrivateKey.class.getName(); |
| Object exArgs[] = { supplied, needed }; |
| |
| throw new XMLSignatureException("algorithms.WrongKeyForThisOperation", |
| exArgs); |
| } |
| |
| try { |
| this._signatureAlgorithm.initSign((PrivateKey) privateKey); |
| } catch (InvalidKeyException ex) { |
| throw new XMLSignatureException("empty", ex); |
| } |
| } |
| |
| /** |
| * Proxy method for {@link java.security.Signature#update} |
| * which is executed on the internal {@link java.security.Signature} object. |
| * |
| * @param input |
| * @throws XMLSignatureException |
| */ |
| protected void engineUpdate(byte[] input) throws XMLSignatureException { |
| |
| try { |
| this._signatureAlgorithm.update(input); |
| } catch (SignatureException ex) { |
| throw new XMLSignatureException("empty", ex); |
| } |
| } |
| |
| /** |
| * Proxy method for {@link java.security.Signature#update} |
| * which is executed on the internal {@link java.security.Signature} object. |
| * |
| * @param input |
| * @throws XMLSignatureException |
| */ |
| protected void engineUpdate(byte input) throws XMLSignatureException { |
| |
| try { |
| this._signatureAlgorithm.update(input); |
| } catch (SignatureException ex) { |
| throw new XMLSignatureException("empty", ex); |
| } |
| } |
| |
| /** |
| * Proxy method for {@link java.security.Signature#update} |
| * 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._signatureAlgorithm.update(buf, offset, len); |
| } catch (SignatureException ex) { |
| throw new XMLSignatureException("empty", ex); |
| } |
| } |
| |
| /** |
| * Method engineGetJCEAlgorithmString |
| * |
| * |
| */ |
| protected String engineGetJCEAlgorithmString() { |
| return this._signatureAlgorithm.getAlgorithm(); |
| } |
| |
| /** |
| * Method engineGetJCEProviderName |
| * |
| * |
| */ |
| protected String engineGetJCEProviderName() { |
| return this._signatureAlgorithm.getProvider().getName(); |
| } |
| |
| |
| /** |
| * Converts an ASN.1 DSA value to a XML Signature DSA Value. |
| * |
| * The JAVA JCE DSA Signature algorithm creates ASN.1 encoded (r,s) value |
| * pairs; the XML Signature requires the core BigInteger values. |
| * |
| * @param asn1Bytes |
| * |
| * @throws IOException |
| * @see <A HREF="http://www.w3.org/TR/xmldsig-core/#dsa-sha1">6.4.1 DSA</A> |
| */ |
| private static byte[] convertASN1toXMLDSIG(byte asn1Bytes[]) |
| throws IOException { |
| |
| byte rLength = asn1Bytes[3]; |
| int i; |
| |
| for (i = rLength; (i > 0) && (asn1Bytes[(4 + rLength) - i] == 0); i--); |
| |
| byte sLength = asn1Bytes[5 + rLength]; |
| int j; |
| |
| for (j = sLength; |
| (j > 0) && (asn1Bytes[(6 + rLength + sLength) - j] == 0); j--); |
| |
| if ((asn1Bytes[0] != 48) || (asn1Bytes[1] != asn1Bytes.length - 2) |
| || (asn1Bytes[2] != 2) || (i > 20) |
| || (asn1Bytes[4 + rLength] != 2) || (j > 20)) { |
| throw new IOException("Invalid ASN.1 format of DSA signature"); |
| } else { |
| byte xmldsigBytes[] = new byte[40]; |
| |
| System.arraycopy(asn1Bytes, (4 + rLength) - i, xmldsigBytes, 20 - i, |
| i); |
| System.arraycopy(asn1Bytes, (6 + rLength + sLength) - j, xmldsigBytes, |
| 40 - j, j); |
| |
| return xmldsigBytes; |
| } |
| } |
| |
| /** |
| * Converts a XML Signature DSA Value to an ASN.1 DSA value. |
| * |
| * The JAVA JCE DSA Signature algorithm creates ASN.1 encoded (r,s) value |
| * pairs; the XML Signature requires the core BigInteger values. |
| * |
| * @param xmldsigBytes |
| * |
| * @throws IOException |
| * @see <A HREF="http://www.w3.org/TR/xmldsig-core/#dsa-sha1">6.4.1 DSA</A> |
| */ |
| private static byte[] convertXMLDSIGtoASN1(byte xmldsigBytes[]) |
| throws IOException { |
| |
| if (xmldsigBytes.length != 40) { |
| throw new IOException("Invalid XMLDSIG format of DSA signature"); |
| } |
| |
| int i; |
| |
| for (i = 20; (i > 0) && (xmldsigBytes[20 - i] == 0); i--); |
| |
| int j = i; |
| |
| if (xmldsigBytes[20 - i] < 0) { |
| j += 1; |
| } |
| |
| int k; |
| |
| for (k = 20; (k > 0) && (xmldsigBytes[40 - k] == 0); k--); |
| |
| int l = k; |
| |
| if (xmldsigBytes[40 - k] < 0) { |
| l += 1; |
| } |
| |
| byte asn1Bytes[] = new byte[6 + j + l]; |
| |
| asn1Bytes[0] = 48; |
| asn1Bytes[1] = (byte) (4 + j + l); |
| asn1Bytes[2] = 2; |
| asn1Bytes[3] = (byte) j; |
| |
| System.arraycopy(xmldsigBytes, 20 - i, asn1Bytes, (4 + j) - i, i); |
| |
| asn1Bytes[4 + j] = 2; |
| asn1Bytes[5 + j] = (byte) l; |
| |
| System.arraycopy(xmldsigBytes, 40 - k, asn1Bytes, (6 + j + l) - k, k); |
| |
| return asn1Bytes; |
| } |
| |
| /** |
| * Method engineSetHMACOutputLength |
| * |
| * @param HMACOutputLength |
| * @throws XMLSignatureException |
| */ |
| protected void engineSetHMACOutputLength(int HMACOutputLength) |
| throws XMLSignatureException { |
| throw new XMLSignatureException("algorithms.HMACOutputLengthOnlyForHMAC"); |
| } |
| |
| /** |
| * Method engineInitSign |
| * |
| * @param signingKey |
| * @param algorithmParameterSpec |
| * @throws XMLSignatureException |
| */ |
| protected void engineInitSign( |
| Key signingKey, AlgorithmParameterSpec algorithmParameterSpec) |
| throws XMLSignatureException { |
| throw new XMLSignatureException( |
| "algorithms.CannotUseAlgorithmParameterSpecOnDSA"); |
| } |
| } |
