com.android.pwdhashandroid.sharp2java.HMACMD5.java Source code

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Here is the source code for com.android.pwdhashandroid.sharp2java.HMACMD5.java

Source

// HMACMD5.java
// 
// Copyright (C) 2009 Jrgen Steinblock
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program 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 for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program.  If not, see <http://www.gnu.org/licenses/>.
//

package com.android.pwdhashandroid.sharp2java;

import java.security.GeneralSecurityException;
import javax.crypto.Mac;
import javax.crypto.spec.SecretKeySpec;

import org.apache.http.util.EncodingUtils;

/// <summary>
/// Generates HmacMD5 Hash with java.cryptox functions
/// but works like dot.NET System.Security.Cryptography.HMACMD5 Class
/// </summary>
public class HMACMD5 {

    private final String HMAC_MD5_NAME = "HmacMD5";

    private SecretKeySpec sk;
    private Mac mac;

    public HMACMD5(byte[] key) throws GeneralSecurityException {
        init(key);
    }

    public HMACMD5(String key) throws GeneralSecurityException {
        init(EncodingUtils.getAsciiBytes(key));
    }

    private void init(byte[] key) throws GeneralSecurityException {
        sk = new SecretKeySpec(key, HMAC_MD5_NAME);
        mac = Mac.getInstance(HMAC_MD5_NAME);
        mac.init(sk);
    }

    public byte[] ComputeHash(byte[] data) {
        return mac.doFinal(data);
    }

    public byte[] ComputeHash(String data) {
        return ComputeHash(EncodingUtils.getAsciiBytes(data));
    }
}