Java SHA1 sha1(String data)

Description

Creates a sha1 out from a given data.

License

Apache License

Parameter

Parameter	Description
data	the data

Return

the sha1 for data

Declaration

protected static String sha1(String data) 

Method Source Code

//package com.java2s;
/*/*from w w  w . j  a  va2  s. c om*/
 * Copyright 2016 the original author or authors.
 *
 * 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.io.UnsupportedEncodingException;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;

public class Main {
    private static final char[] CHARS = { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'a', 'b', 'c', 'd', 'e',
            'f' };

    /**
     * Creates a sha1 out from a given data.
     *
     * @param data the data
     * @return the sha1 for data
     */
    protected static String sha1(String data) {
        try {
            return new String(encodeHex(MessageDigest.getInstance("SHA-1").digest(data.getBytes("UTF-8"))));
        } catch (NoSuchAlgorithmException e) {
            throw new IllegalStateException(e);
        } catch (UnsupportedEncodingException e) {
            throw new IllegalStateException(e);
        }
    }

    /**
     * Encode given data as lower case hex chars.
     *
     * @param data the data
     * @return the endoced chars
     */
    private static char[] encodeHex(final byte[] data) {
        final int len = data.length;
        final char[] out = new char[len << 1];
        for (int i = 0, j = 0; i < len; i++) {
            out[j++] = CHARS[(0xF0 & data[i]) >>> 4];
            out[j++] = CHARS[0x0F & data[i]];
        }
        return out;
    }
}

Related

1. SHA1(InputStream in)
2. SHA1(MessageDigest messageDigest, String... texts)
3. sha1(Object object)
4. sha1(String data)
5. sha1(String data)
6. sha1(String data)
7. SHA1(String decript)
8. sha1(String input)
9. sha1(String input)