Java SHA1 sha1(String s)

Description

Computes the SHA1 sum of the given string.

License

Open Source License

Parameter

Parameter	Description
s	the string

Return

the SHA1 sum

Declaration

public static String sha1(String s) 

Method Source Code

//package com.java2s;
//License from project: Open Source License 

import java.io.UnsupportedEncodingException;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;

public class Main {
    /**/* ww  w.j a  v a2 s .c o m*/
     * Computes the SHA1 sum of the given string.
     *
     * @param s the string
     * @return the SHA1 sum
     */
    public static String sha1(String s) {
        try {
            return byteArrayToHexString(MessageDigest.getInstance("SHA").digest(s.getBytes("US-ASCII")));
        } catch (NoSuchAlgorithmException | UnsupportedEncodingException nsae) {
            throw new RuntimeException(nsae);
        }
    }

    /**
     * Convert a byte array into the corresponding string.
     *
     * @param  b the byte array to convert
     * @return the string representation of this byte array
     */
    public static String byteArrayToHexString(byte[] b) {
        StringBuilder sb = new StringBuilder(b.length * 2);

        for (byte aB : b) {
            int j = (aB & 0xff);

            if (j < 16) {
                sb.append('0');
            }

            sb.append(Integer.toHexString(j));
        }

        return sb.toString();
    }
}

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