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/*
* Copyright (c) 2019, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
package com.evilprovider;
import java.security.*;
import java.security.spec.*;
import java.nio.ByteBuffer;
import javax.crypto.*;
public final class EvilHmacSHA1 extends MacSpi {
private final Mac internalMac;
public EvilHmacSHA1() throws GeneralSecurityException {
internalMac = Mac.getInstance("HmacSHA1", "SunJCE");
}
@Override
protected byte[] engineDoFinal() {
return internalMac.doFinal();
}
@Override
protected int engineGetMacLength() {
return internalMac.getMacLength();
}
@Override
protected void engineInit(Key key, AlgorithmParameterSpec spec)
throws InvalidKeyException, InvalidAlgorithmParameterException {
SecretKey sKey;
if (key instanceof SecretKey) {
sKey = (SecretKey)key;
} else {
throw new IllegalArgumentException("Key must be a SecretKey");
}
byte[] sKeyEnc = sKey.getEncoded();
int keyBits = sKeyEnc.length * 8;
if (keyBits < 160) {
throw new IllegalArgumentException("Key must be at least 160 bits");
}
// Pass through to init
internalMac.init(key, spec);
}
@Override
protected void engineReset() {
internalMac.reset();
}
@Override
protected void engineUpdate(byte input) {
internalMac.update(input);
}
@Override
protected void engineUpdate(byte[] input, int offset, int len) {
internalMac.update(input, offset, len);
}
@Override
protected void engineUpdate(ByteBuffer input) {
internalMac.update(input);
}
}
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