method convert string to SHA-224, SHA-256, SHA-384, and SHA-512. - Android java.security

Android examples for java.security:Sha

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Description

method convert string to SHA-224, SHA-256, SHA-384, and SHA-512.

Demo Code


//package com.java2s;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;

public class Main {
    /**/*from  ww w. ja v  a 2s  . c  om*/
     * method convert string to SHA-224, SHA-256, SHA-384, and SHA-512.
     * 
     * @param key
     * @return
     */
    public static String convertStringToSha(String key) {
        MessageDigest md;
        StringBuffer hexString = null;
        try {
            md = MessageDigest.getInstance("SHA-512");
            md.update(key.getBytes());

            byte byteData[] = md.digest();

            // convert the byte to hex format method 1
            StringBuffer sb = new StringBuffer();
            for (int i = 0; i < byteData.length; i++) {
                sb.append(Integer
                        .toString((byteData[i] & 0xff) + 0x100, 16)
                        .substring(1));
            }

            // convert the byte to hex format method 2
            hexString = new StringBuffer();
            for (int i = 0; i < byteData.length; i++) {
                String hex = Integer.toHexString(0xff & byteData[i]);
                if (hex.length() == 1)
                    hexString.append('0');
                hexString.append(hex);
            }
        } catch (NoSuchAlgorithmException e) {
            e.printStackTrace();
        }

        return hexString.toString();
    }
}

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