Java SHA1 computeSHA1(ByteBuffer convertme, int offset, int len)

Description

compute SHA

License

GNU General Public License

Declaration

public static byte[] computeSHA1(ByteBuffer convertme, int offset, int len) 

Method Source Code

//package com.java2s;
/*//  w w w  . j  a v  a2  s.  c o  m
 * This is the source code of Telegram for Android v. 2.x.x.
 * It is licensed under GNU GPL v. 2 or later.
 * You should have received a copy of the license in this archive (see LICENSE).
 *
 * Copyright Nikolai Kudashov, 2013-2015.
 */

import java.nio.ByteBuffer;
import java.security.*;

public class Main {
    public static byte[] computeSHA1(byte[] convertme, int offset, int len) {
        try {
            MessageDigest md = MessageDigest.getInstance("SHA-1");
            md.update(convertme, offset, len);
            return md.digest();
        } catch (Exception e) {
            //FileLog.e("tmessages", e);
        }
        return null;
    }

    public static byte[] computeSHA1(ByteBuffer convertme, int offset, int len) {
        int oldp = convertme.position();
        int oldl = convertme.limit();
        try {
            MessageDigest md = MessageDigest.getInstance("SHA-1");
            convertme.position(offset);
            convertme.limit(len);
            md.update(convertme);
            return md.digest();
        } catch (Exception e) {
            //FileLog.e("tmessages", e);
        } finally {
            convertme.limit(oldl);
            convertme.position(oldp);
        }
        return new byte[0];
    }

    public static byte[] computeSHA1(ByteBuffer convertme) {
        return computeSHA1(convertme, 0, convertme.limit());
    }

    public static byte[] computeSHA1(byte[] convertme) {
        return computeSHA1(convertme, 0, convertme.length);
    }
}

Related

1. computeSHA1(byte[] ba)
2. computeSha1(byte[] data)
3. computeSha1(ReadableByteChannel channel)
4. computeSha1AsHexString(String strToHash)
5. computeSHA1Hash(byte[] data)
6. digestSHA1(byte[] data)