Android SHA256 Hash Create doubleSha256(byte[] data, int offset, int length)

Description

double Sha

License

Apache License

Declaration

public static byte[] doubleSha256(byte[] data, int offset, int length) 

Method Source Code

//package com.java2s;
/**/*from  w  w w  . j  a v a2 s.co  m*/
 * Copyright 2011 bccapi.com
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;

public class Main {
    private static final String SHA256 = "SHA-256";

    public static byte[] doubleSha256(byte[] data) {
        return doubleSha256(data, 0, data.length);
    }

    public static byte[] doubleSha256(byte[] data, int offset, int length) {
        try {
            MessageDigest digest;
            digest = MessageDigest.getInstance(SHA256);
            digest.update(data, offset, length);
            return digest.digest(digest.digest());
        } catch (NoSuchAlgorithmException e) {
            throw new RuntimeException(e); // Cannot happen.
        }
    }
}

Related

1. sha256(byte[] data1, byte[] data2)
2. sha256(final String aString)
3. sha256Byte(String in)
4. sha256Byte(byte[] in)
5. doubleSha256(byte[] data)
6. doubleSha256TwoBuffers(byte[] data1, byte[] data2)
7. SHA256(String text)
8. getHmacSHA256(String key, String input)
9. sha256(byte[] data)