author | valeriep |
Tue, 08 May 2012 17:57:48 -0700 | |
changeset 12685 | 8a448b5b9006 |
parent 10336 | 0bb1999251f8 |
child 24578 | bbf15045dfbb |
permissions | -rw-r--r-- |
2 | 1 |
/* |
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* Copyright (c) 1997, 2011, Oracle and/or its affiliates. All rights reserved. |
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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* |
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* This code is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License version 2 only, as |
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* published by the Free Software Foundation. Oracle designates this |
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* particular file as subject to the "Classpath" exception as provided |
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* by Oracle in the LICENSE file that accompanied this code. |
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* |
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* This code is distributed in the hope that it will be useful, but WITHOUT |
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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* version 2 for more details (a copy is included in the LICENSE file that |
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* accompanied this code). |
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* |
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* You should have received a copy of the GNU General Public License version |
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* 2 along with this work; if not, write to the Free Software Foundation, |
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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* |
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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* or visit www.oracle.com if you need additional information or have any |
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* questions. |
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*/ |
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package com.sun.crypto.provider; |
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import java.io.*; |
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import sun.security.util.*; |
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import java.math.BigInteger; |
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import java.security.AlgorithmParametersSpi; |
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import java.security.spec.AlgorithmParameterSpec; |
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import java.security.spec.InvalidParameterSpecException; |
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import javax.crypto.spec.DHParameterSpec; |
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/** |
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* This class implements the parameter set used by the |
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* Diffie-Hellman key agreement as defined in the PKCS #3 standard. |
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* |
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* @author Jan Luehe |
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* |
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*/ |
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public final class DHParameters extends AlgorithmParametersSpi { |
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// The prime (p). |
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private BigInteger p = BigInteger.ZERO; |
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// The base (g). |
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private BigInteger g = BigInteger.ZERO; |
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// The private-value length (l) |
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private int l = 0; |
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protected void engineInit(AlgorithmParameterSpec paramSpec) |
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throws InvalidParameterSpecException { |
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if (!(paramSpec instanceof DHParameterSpec)) { |
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throw new InvalidParameterSpecException |
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("Inappropriate parameter specification"); |
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} |
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this.p = ((DHParameterSpec)paramSpec).getP(); |
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this.g = ((DHParameterSpec)paramSpec).getG(); |
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this.l = ((DHParameterSpec)paramSpec).getL(); |
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} |
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protected void engineInit(byte[] params) throws IOException { |
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try { |
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DerValue encodedParams = new DerValue(params); |
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if (encodedParams.tag != DerValue.tag_Sequence) { |
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throw new IOException("DH params parsing error"); |
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} |
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encodedParams.data.reset(); |
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this.p = encodedParams.data.getBigInteger(); |
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this.g = encodedParams.data.getBigInteger(); |
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// Private-value length is OPTIONAL |
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if (encodedParams.data.available() != 0) { |
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this.l = encodedParams.data.getInteger(); |
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} |
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if (encodedParams.data.available() != 0) { |
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throw new IOException |
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("DH parameter parsing error: Extra data"); |
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} |
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} catch (NumberFormatException e) { |
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throw new IOException("Private-value length too big"); |
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} |
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} |
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protected void engineInit(byte[] params, String decodingMethod) |
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throws IOException { |
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engineInit(params); |
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} |
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0bb1999251f8
7064075: Security libraries don't build with javac -Xlint:all,-deprecation -Werror
jjg
parents:
5506
diff
changeset
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protected <T extends AlgorithmParameterSpec> |
0bb1999251f8
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T engineGetParameterSpec(Class<T> paramSpec) |
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throws InvalidParameterSpecException { |
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if (DHParameterSpec.class.isAssignableFrom(paramSpec)) { |
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return paramSpec.cast(new DHParameterSpec(this.p, this.g, this.l)); |
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} else { |
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throw new InvalidParameterSpecException |
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("Inappropriate parameter Specification"); |
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} |
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} |
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protected byte[] engineGetEncoded() throws IOException { |
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DerOutputStream out = new DerOutputStream(); |
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DerOutputStream bytes = new DerOutputStream(); |
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bytes.putInteger(this.p); |
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bytes.putInteger(this.g); |
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// Private-value length is OPTIONAL |
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if (this.l > 0) { |
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bytes.putInteger(this.l); |
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} |
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out.write(DerValue.tag_Sequence, bytes); |
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return out.toByteArray(); |
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} |
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protected byte[] engineGetEncoded(String encodingMethod) |
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throws IOException { |
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return engineGetEncoded(); |
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} |
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/* |
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* Returns a formatted string describing the parameters. |
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*/ |
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protected String engineToString() { |
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String LINE_SEP = System.getProperty("line.separator"); |
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StringBuffer strbuf |
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= new StringBuffer("SunJCE Diffie-Hellman Parameters:" |
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+ LINE_SEP + "p:" + LINE_SEP |
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+ Debug.toHexString(this.p) |
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+ LINE_SEP + "g:" + LINE_SEP |
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+ Debug.toHexString(this.g)); |
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if (this.l != 0) |
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strbuf.append(LINE_SEP + "l:" + LINE_SEP + " " + this.l); |
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return strbuf.toString(); |
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} |
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} |