Java SHA256 sha256Hash(final String tohash)

Description

sha Hash

License

Educational Community License

Declaration

public static String sha256Hash(final String tohash) 

Method Source Code

//package com.java2s;
/**/*from w  ww.  j a  v a  2  s .co  m*/
 * $URL$
 * $Id$
 *
 * Copyright (c) 2010 The Sakai Foundation
 *
 * Licensed under the Educational Community 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.opensource.org/licenses/ECL-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.io.UnsupportedEncodingException;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;

public class Main {
    private static final char[] TOHEX = "0123456789abcdef".toCharArray();

    public static String sha256Hash(final String tohash) {
        byte[] b = null;
        try {
            b = tohash.getBytes("UTF-8");
            MessageDigest sha256 = MessageDigest.getInstance("SHA-256");
            b = sha256.digest(b);
        } catch (UnsupportedEncodingException e) {
            throw new Error(e);
        } catch (NoSuchAlgorithmException e) {
            throw new Error(e);
        }
        return byteToHex(b);
    }

    public static String byteToHex(final byte[] base) {
        if (base != null) {
            char[] c = new char[base.length * 2];
            int i = 0;

            for (byte b : base) {
                int j = b;
                j = j + 128;
                c[i++] = TOHEX[j / 0x10];
                c[i++] = TOHEX[j % 0x10];
            }
            return new String(c);
        } else {
            return null;
        }
    }
}

Related

1. sha256Encode(String message)
2. sha256encrypt(String phrase)
3. sha256Hash()
4. sha256Hash(byte[] data)
5. sha256Hash(File file)
6. sha256HashHex(String data)
7. SHA256Sum(final @Nonnull byte[] bytes)