Java SHA sha(byte data[])

Description

sha

License

Apache License

Declaration

public static byte[] sha(byte data[]) 

Method Source Code

//package com.java2s;
/**/*  ww w  .ja  v  a  2 s .  c om*/
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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.io.IOException;
import java.io.InputStream;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;

public class Main {
    public static byte[] sha(byte data[]) {
        return getShaDigest().digest(data);
    }

    public static byte[] sha(InputStream is) throws IOException {
        return digest(getShaDigest(), is);
    }

    private static byte[] digest(MessageDigest md, InputStream is) throws IOException {
        final byte buffer[] = new byte[4096];
        for (int count = is.read(buffer); count > 0; count = is.read(buffer)) {
            md.update(buffer, 0, count);
        }
        return md.digest();
    }

    private static MessageDigest getShaDigest() {
        return getDigest("SHA");
    }

    private static MessageDigest getDigest(String algorithm) {
        try {
            return MessageDigest.getInstance(algorithm);
        } catch (NoSuchAlgorithmException e) {
            throw new RuntimeException(e);
        }
    }
}

Related

1. sha(byte[] data)
2. SHA(String s)
3. sha(String source)
4. sha(String str)