/* * Copyright (c) 1997, 2007, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation. Oracle designates this * particular file as subject to the "Classpath" exception as provided * by Oracle in the LICENSE file that accompanied this code. * * This code is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. */package com.sun.crypto.provider;import java.util.*;import java.io.*;import sun.security.util.*;import java.math.BigInteger;import java.security.AlgorithmParametersSpi;import java.security.spec.AlgorithmParameterSpec;import java.security.spec.InvalidParameterSpecException;import javax.crypto.spec.DHParameterSpec;/** * This class implements the parameter set used by the * Diffie-Hellman key agreement as defined in the PKCS #3 standard. * * @author Jan Luehe * */public final class DHParameters extends AlgorithmParametersSpi { // The prime (p). private BigInteger p = BigInteger.ZERO; // The base (g). private BigInteger g = BigInteger.ZERO; // The private-value length (l) private int l = 0; protected void engineInit(AlgorithmParameterSpec paramSpec) throws InvalidParameterSpecException { if (!(paramSpec instanceof DHParameterSpec)) { throw new InvalidParameterSpecException ("Inappropriate parameter specification"); } this.p = ((DHParameterSpec)paramSpec).getP(); this.g = ((DHParameterSpec)paramSpec).getG(); this.l = ((DHParameterSpec)paramSpec).getL(); } protected void engineInit(byte[] params) throws IOException { try { DerValue encodedParams = new DerValue(params); if (encodedParams.tag != DerValue.tag_Sequence) { throw new IOException("DH params parsing error"); } encodedParams.data.reset(); this.p = encodedParams.data.getBigInteger(); this.g = encodedParams.data.getBigInteger(); // Private-value length is OPTIONAL if (encodedParams.data.available() != 0) { this.l = encodedParams.data.getInteger(); } if (encodedParams.data.available() != 0) { throw new IOException ("DH parameter parsing error: Extra data"); } } catch (NumberFormatException e) { throw new IOException("Private-value length too big"); } } protected void engineInit(byte[] params, String decodingMethod) throws IOException { engineInit(params); } protected AlgorithmParameterSpec engineGetParameterSpec(Class paramSpec) throws InvalidParameterSpecException { if (DHParameterSpec.class.isAssignableFrom(paramSpec)) { return new DHParameterSpec(this.p, this.g, this.l); } else { throw new InvalidParameterSpecException ("Inappropriate parameter Specification"); } } protected byte[] engineGetEncoded() throws IOException { DerOutputStream out = new DerOutputStream(); DerOutputStream bytes = new DerOutputStream(); bytes.putInteger(this.p); bytes.putInteger(this.g); // Private-value length is OPTIONAL if (this.l > 0) { bytes.putInteger(this.l); } out.write(DerValue.tag_Sequence, bytes); return out.toByteArray(); } protected byte[] engineGetEncoded(String encodingMethod) throws IOException { return engineGetEncoded(); } /* * Returns a formatted string describing the parameters. */ protected String engineToString() { String LINE_SEP = System.getProperty("line.separator"); StringBuffer strbuf = new StringBuffer("SunJCE Diffie-Hellman Parameters:" + LINE_SEP + "p:" + LINE_SEP + Debug.toHexString(this.p) + LINE_SEP + "g:" + LINE_SEP + Debug.toHexString(this.g)); if (this.l != 0) strbuf.append(LINE_SEP + "l:" + LINE_SEP + " " + this.l); return strbuf.toString(); }}
/*
* Copyright (c) 1997, 2007, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
package com.sun.crypto.provider;
import java.util.*;
import java.io.*;
import sun.security.util.*;
import java.math.BigInteger;
import java.security.AlgorithmParametersSpi;
import java.security.spec.AlgorithmParameterSpec;
import java.security.spec.InvalidParameterSpecException;
import javax.crypto.spec.DHParameterSpec;
/**
* This class implements the parameter set used by the
* Diffie-Hellman key agreement as defined in the PKCS #3 standard.
*
* @author Jan Luehe
*
*/
public final class DHParameters extends AlgorithmParametersSpi {
// The prime (p).
private BigInteger p = BigInteger.ZERO;
// The base (g).
private BigInteger g = BigInteger.ZERO;
// The private-value length (l)
private int l = 0;
protected void engineInit(AlgorithmParameterSpec paramSpec)
throws InvalidParameterSpecException {
if (!(paramSpec instanceof DHParameterSpec)) {
throw new InvalidParameterSpecException
("Inappropriate parameter specification");
}
this.p = ((DHParameterSpec)paramSpec).getP();
this.g = ((DHParameterSpec)paramSpec).getG();
this.l = ((DHParameterSpec)paramSpec).getL();
}
protected void engineInit(byte[] params) throws IOException {
try {
DerValue encodedParams = new DerValue(params);
if (encodedParams.tag != DerValue.tag_Sequence) {
throw new IOException("DH params parsing error");
}
encodedParams.data.reset();
this.p = encodedParams.data.getBigInteger();
this.g = encodedParams.data.getBigInteger();
// Private-value length is OPTIONAL
if (encodedParams.data.available() != 0) {
this.l = encodedParams.data.getInteger();
}
if (encodedParams.data.available() != 0) {
throw new IOException
("DH parameter parsing error: Extra data");
}
} catch (NumberFormatException e) {
throw new IOException("Private-value length too big");
}
}
protected void engineInit(byte[] params, String decodingMethod)
throws IOException {
engineInit(params);
}
protected AlgorithmParameterSpec engineGetParameterSpec(Class paramSpec)
throws InvalidParameterSpecException {
if (DHParameterSpec.class.isAssignableFrom(paramSpec)) {
return new DHParameterSpec(this.p, this.g, this.l);
} else {
throw new InvalidParameterSpecException
("Inappropriate parameter Specification");
}
}
protected byte[] engineGetEncoded() throws IOException {
DerOutputStream out = new DerOutputStream();
DerOutputStream bytes = new DerOutputStream();
bytes.putInteger(this.p);
bytes.putInteger(this.g);
// Private-value length is OPTIONAL
if (this.l > 0) {
bytes.putInteger(this.l);
}
out.write(DerValue.tag_Sequence, bytes);
return out.toByteArray();
}
protected byte[] engineGetEncoded(String encodingMethod)
throws IOException {
return engineGetEncoded();
}
/*
* Returns a formatted string describing the parameters.
*/
protected String engineToString() {
String LINE_SEP = System.getProperty("line.separator");
StringBuffer strbuf
= new StringBuffer("SunJCE Diffie-Hellman Parameters:"
+ LINE_SEP + "p:" + LINE_SEP
+ Debug.toHexString(this.p)
+ LINE_SEP + "g:" + LINE_SEP
+ Debug.toHexString(this.g));
if (this.l != 0)
strbuf.append(LINE_SEP + "l:" + LINE_SEP + " " + this.l);
return strbuf.toString();
}
}