83 lines
2.6 KiB
Java
83 lines
2.6 KiB
Java
/* -*-mode:java; c-basic-offset:2; indent-tabs-mode:nil -*- */
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/*
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Copyright (c) 2012-2015 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 com.jcraft.jsch.MAC;
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import javax.crypto.*;
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import javax.crypto.spec.*;
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abstract class HMAC implements MAC {
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protected String name;
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protected int bsize;
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protected String algorithm;
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private Mac mac;
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public int getBlockSize() {
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return bsize;
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};
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public void init(byte[] key) throws Exception {
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if(key.length>bsize){
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byte[] tmp = new byte[bsize];
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System.arraycopy(key, 0, tmp, 0, bsize);
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key = tmp;
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}
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SecretKeySpec skey = new SecretKeySpec(key, algorithm);
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mac = Mac.getInstance(algorithm);
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mac.init(skey);
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}
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private final byte[] tmp = new byte[4];
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public void update(int i){
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tmp[0] = (byte)(i>>>24);
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tmp[1] = (byte)(i>>>16);
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tmp[2] = (byte)(i>>>8);
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tmp[3] = (byte)i;
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update(tmp, 0, 4);
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}
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public void update(byte foo[], int s, int l){
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mac.update(foo, s, l);
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}
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public void doFinal(byte[] buf, int offset){
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try{
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mac.doFinal(buf, offset);
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}
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catch(ShortBufferException e){
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System.err.println(e);
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}
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}
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public String getName(){
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return name;
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}
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}
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