1 /* -*-mode:java; c-basic-offset:2; indent-tabs-mode:nil -*- */
3 Copyright (c) 2002-2010 ymnk, JCraft,Inc. All rights reserved.
5 Redistribution and use in source and binary forms, with or without
6 modification, are permitted provided that the following conditions are met:
8 1. Redistributions of source code must retain the above copyright notice,
9 this list of conditions and the following disclaimer.
11 2. Redistributions in binary form must reproduce the above copyright
12 notice, this list of conditions and the following disclaimer in
13 the documentation and/or other materials provided with the distribution.
15 3. The names of the authors may not be used to endorse or promote products
16 derived from this software without specific prior written permission.
18 THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES,
19 INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
20 FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL JCRAFT,
21 INC. OR ANY CONTRIBUTORS TO THIS SOFTWARE BE LIABLE FOR ANY DIRECT, INDIRECT,
22 INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
23 LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,
24 OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
25 LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
26 NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
27 EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30 package com.jcraft.jsch.jce;
32 import java.math.BigInteger;
33 import java.security.*;
34 import java.security.spec.*;
36 public class SignatureRSA implements com.jcraft.jsch.SignatureRSA{
38 java.security.Signature signature;
39 KeyFactory keyFactory;
41 public void init() throws Exception{
42 signature=java.security.Signature.getInstance("SHA1withRSA");
43 keyFactory=KeyFactory.getInstance("RSA");
45 public void setPubKey(byte[] e, byte[] n) throws Exception{
46 RSAPublicKeySpec rsaPubKeySpec =
47 new RSAPublicKeySpec(new BigInteger(n),
49 PublicKey pubKey=keyFactory.generatePublic(rsaPubKeySpec);
50 signature.initVerify(pubKey);
52 public void setPrvKey(byte[] d, byte[] n) throws Exception{
53 RSAPrivateKeySpec rsaPrivKeySpec =
54 new RSAPrivateKeySpec(new BigInteger(n),
56 PrivateKey prvKey = keyFactory.generatePrivate(rsaPrivKeySpec);
57 signature.initSign(prvKey);
59 public byte[] sign() throws Exception{
60 byte[] sig=signature.sign();
63 public void update(byte[] foo) throws Exception{
64 signature.update(foo);
66 public boolean verify(byte[] sig) throws Exception{
71 if(sig[0]==0 && sig[1]==0 && sig[2]==0){
72 j=((sig[i++]<<24)&0xff000000)|((sig[i++]<<16)&0x00ff0000)|
73 ((sig[i++]<<8)&0x0000ff00)|((sig[i++])&0x000000ff);
75 j=((sig[i++]<<24)&0xff000000)|((sig[i++]<<16)&0x00ff0000)|
76 ((sig[i++]<<8)&0x0000ff00)|((sig[i++])&0x000000ff);
78 System.arraycopy(sig, i, tmp, 0, j); sig=tmp;
80 //System.err.println("j="+j+" "+Integer.toHexString(sig[0]&0xff));
81 return signature.verify(sig);