org.tdmx.client.crypto.converters.ByteArray.java Source code

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Here is the source code for org.tdmx.client.crypto.converters.ByteArray.java

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/*
 * TDMX - Trusted Domain Messaging eXchange
 * 
 * Enterprise B2B messaging between separate corporations via interoperable cloud service providers.
 * 
 * Copyright (C) 2014 Peter Klauser (http://tdmx.org)
 * 
 * This program is free software: you can redistribute it and/or modify it under the terms of the GNU Affero 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 Affero General Public License for more
 * details.
 * 
 * You should have received a copy of the GNU Affero General Public License along with this program. If not, see
 * http://www.gnu.org/licenses/.
 */
package org.tdmx.client.crypto.converters;

import org.apache.commons.codec.DecoderException;
import org.apache.commons.codec.binary.Hex;
import org.bouncycastle.util.Arrays;

public class ByteArray {

    public static boolean equals(byte[] a, byte[] b) {
        return Arrays.areEqual(a, b);
    }

    public static byte[] clone(byte[] b) {
        byte[] copy = new byte[b.length];
        System.arraycopy(b, 0, copy, 0, b.length);
        return copy;
    }

    public static byte[] append(byte[] first, byte[] second, byte[] third, byte[] forth, byte[] fifth) {
        byte[] array = new byte[first.length + second.length + third.length + forth.length];
        System.arraycopy(first, 0, array, 0, first.length);
        System.arraycopy(second, 0, array, first.length, second.length);
        System.arraycopy(third, 0, array, first.length + second.length, third.length);
        System.arraycopy(forth, 0, array, first.length + second.length + third.length, forth.length);
        System.arraycopy(fifth, 0, array, first.length + second.length + third.length + forth.length, fifth.length);
        return array;
    }

    public static byte[] append(byte[] first, byte[] second, byte[] third, byte[] forth) {
        byte[] array = new byte[first.length + second.length + third.length + forth.length];
        System.arraycopy(first, 0, array, 0, first.length);
        System.arraycopy(second, 0, array, first.length, second.length);
        System.arraycopy(third, 0, array, first.length + second.length, third.length);
        System.arraycopy(forth, 0, array, first.length + second.length + third.length, forth.length);
        return array;
    }

    public static byte[] append(byte[] first, byte[] second, byte[] third) {
        byte[] array = new byte[first.length + second.length + third.length];
        System.arraycopy(first, 0, array, 0, first.length);
        System.arraycopy(second, 0, array, first.length, second.length);
        System.arraycopy(third, 0, array, first.length + second.length, third.length);
        return array;
    }

    public static byte[] append(byte[] first, byte[] second) {
        byte[] array = new byte[first.length + second.length];
        System.arraycopy(first, 0, array, 0, first.length);
        System.arraycopy(second, 0, array, first.length, second.length);
        return array;
    }

    public static byte[] interleave(byte[] first, byte[] second) {
        byte[] array = new byte[first.length + second.length];
        for (int i = 0; i < first.length && i < second.length; i++) {
            array[i * 2] = first[i];
            array[i * 2 + 1] = second[i];
        }
        return array;
    }

    public static byte[] subArray(byte[] src, int offset, int len) {
        byte[] result = new byte[len];
        System.arraycopy(src, offset, result, 0, len);
        return result;
    }

    public static byte[] subArray(byte[] src, int offset) {
        int len = src.length - offset;
        byte[] result = new byte[len];
        System.arraycopy(src, offset, result, 0, len);
        return result;
    }

    public static String asHex(byte[] b) {
        return new String(Hex.encodeHex(b));
    }

    public static byte[] fromHex(char[] h) {
        try {
            return Hex.decodeHex(h);
        } catch (DecoderException e) {
            throw new RuntimeException(e);
        }
    }
}