84 lines
3.1 KiB
Java
84 lines
3.1 KiB
Java
/* -*-mode:java; c-basic-offset:2; indent-tabs-mode:nil -*- */
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/*
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Copyright (c) 2002-2015 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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package com.jcraft.jsch.jce;
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import java.math.BigInteger;
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import java.security.*;
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import java.security.spec.*;
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public class SignatureRSA implements com.jcraft.jsch.SignatureRSA{
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java.security.Signature signature;
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KeyFactory keyFactory;
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public void init() throws Exception{
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signature=java.security.Signature.getInstance("SHA1withRSA");
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keyFactory=KeyFactory.getInstance("RSA");
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}
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public void setPubKey(byte[] e, byte[] n) throws Exception{
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RSAPublicKeySpec rsaPubKeySpec =
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new RSAPublicKeySpec(new BigInteger(n),
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new BigInteger(e));
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PublicKey pubKey=keyFactory.generatePublic(rsaPubKeySpec);
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signature.initVerify(pubKey);
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}
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public void setPrvKey(byte[] d, byte[] n) throws Exception{
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RSAPrivateKeySpec rsaPrivKeySpec =
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new RSAPrivateKeySpec(new BigInteger(n),
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new BigInteger(d));
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PrivateKey prvKey = keyFactory.generatePrivate(rsaPrivKeySpec);
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signature.initSign(prvKey);
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}
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public byte[] sign() throws Exception{
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byte[] sig=signature.sign();
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return sig;
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}
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public void update(byte[] foo) throws Exception{
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signature.update(foo);
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}
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public boolean verify(byte[] sig) throws Exception{
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int i=0;
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int j=0;
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byte[] tmp;
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if(sig[0]==0 && sig[1]==0 && sig[2]==0){
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j=((sig[i++]<<24)&0xff000000)|((sig[i++]<<16)&0x00ff0000)|
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((sig[i++]<<8)&0x0000ff00)|((sig[i++])&0x000000ff);
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i+=j;
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j=((sig[i++]<<24)&0xff000000)|((sig[i++]<<16)&0x00ff0000)|
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((sig[i++]<<8)&0x0000ff00)|((sig[i++])&0x000000ff);
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tmp=new byte[j];
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System.arraycopy(sig, i, tmp, 0, j); sig=tmp;
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}
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//System.err.println("j="+j+" "+Integer.toHexString(sig[0]&0xff));
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return signature.verify(sig);
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}
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}
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