118 lines
4.3 KiB
Java
118 lines
4.3 KiB
Java
using System;
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namespace Tamir.SharpSsh.jsch.jce
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{
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/* -*-mode:java; c-basic-offset:2; -*- */
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/*
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Copyright (c) 2002,2003,2004 ymnk, JCraft,Inc. All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions are met:
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1. Redistributions of source code must retain the above copyright notice,
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this list of conditions and the following disclaimer.
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2. Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in
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the documentation and/or other materials provided with the distribution.
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3. The names of the authors may not be used to endorse or promote products
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derived from this software without specific prior written permission.
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THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES,
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INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
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FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL JCRAFT,
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INC. OR ANY CONTRIBUTORS TO THIS SOFTWARE BE LIABLE FOR ANY DIRECT, INDIRECT,
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INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,
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OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
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EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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public class SignatureDSA : Tamir.SharpSsh.jsch.SignatureDSA
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{
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//java.security.Signature signature;
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// KeyFactory keyFactory;
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System.Security.Cryptography.DSAParameters DSAKeyInfo;
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System.Security.Cryptography.SHA1CryptoServiceProvider sha1;
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System.Security.Cryptography.CryptoStream cs;
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public void init()
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{
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sha1 = new System.Security.Cryptography.SHA1CryptoServiceProvider();
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cs = new System.Security.Cryptography.CryptoStream(System.IO.Stream.Null, sha1, System.Security.Cryptography.CryptoStreamMode.Write);
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}
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public void setPubKey(byte[] y, byte[] p, byte[] q, byte[] g)
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{
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DSAKeyInfo.Y = Util.stripLeadingZeros( y );
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DSAKeyInfo.P = Util.stripLeadingZeros( p ) ;
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DSAKeyInfo.Q = Util.stripLeadingZeros( q );
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DSAKeyInfo.G = Util.stripLeadingZeros( g ) ;
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}
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public void setPrvKey(byte[] x, byte[] p, byte[] q, byte[] g)
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{
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DSAKeyInfo.X = Util.stripLeadingZeros( x );
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DSAKeyInfo.P = Util.stripLeadingZeros( p );
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DSAKeyInfo.Q = Util.stripLeadingZeros( q );
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DSAKeyInfo.G = Util.stripLeadingZeros( g );
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}
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public byte[] sign()
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{
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//byte[] sig=signature.sign();
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cs.Close();
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System.Security.Cryptography.DSACryptoServiceProvider DSA = new System.Security.Cryptography.DSACryptoServiceProvider();
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DSA.ImportParameters(DSAKeyInfo);
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System.Security.Cryptography.DSASignatureFormatter DSAFormatter = new System.Security.Cryptography.DSASignatureFormatter(DSA);
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DSAFormatter.SetHashAlgorithm("SHA1");
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byte[] sig =DSAFormatter.CreateSignature( sha1 );
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return sig;
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}
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public void update(byte[] foo)
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{
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//signature.update(foo);
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cs.Write( foo , 0, foo.Length);
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}
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public bool verify(byte[] sig)
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{
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cs.Close();
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System.Security.Cryptography.DSACryptoServiceProvider DSA = new System.Security.Cryptography.DSACryptoServiceProvider();
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DSA.ImportParameters(DSAKeyInfo);
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System.Security.Cryptography.DSASignatureDeformatter DSADeformatter = new System.Security.Cryptography.DSASignatureDeformatter(DSA);
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DSADeformatter.SetHashAlgorithm("SHA1");
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long i=0;
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long j=0;
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byte[] tmp;
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//This makes sure sig is always 40 bytes?
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if(sig[0]==0 && sig[1]==0 && sig[2]==0)
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{
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long i1 = (sig[i++]<<24)&0xff000000;
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long i2 = (sig[i++]<<16)&0x00ff0000;
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long i3 = (sig[i++]<<8)&0x0000ff00;
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long i4 = (sig[i++])&0x000000ff;
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j = i1 | i2 | i3 | i4;
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i+=j;
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i1 = (sig[i++]<<24)&0xff000000;
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i2 = (sig[i++]<<16)&0x00ff0000;
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i3 = (sig[i++]<<8)&0x0000ff00;
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i4 = (sig[i++])&0x000000ff;
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j = i1 | i2 | i3 | i4;
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tmp=new byte[j];
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Array.Copy(sig, i, tmp, 0, j); sig=tmp;
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}
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bool res = DSADeformatter.VerifySignature(sha1, sig);
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return res;
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}
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}
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}
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