Java DES 測試

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package com.des.test;import java.io.UnsupportedEncodingException;import java.security.InvalidKeyException;import java.security.NoSuchAlgorithmException;import java.security.spec.InvalidKeySpecException;import java.security.spec.KeySpec;import java.util.logging.Level;import java.util.logging.Logger;import javax.crypto.BadPaddingException;import javax.crypto.Cipher;import javax.crypto.IllegalBlockSizeException;import javax.crypto.NoSuchPaddingException;import javax.crypto.SecretKey;import javax.crypto.SecretKeyFactory;import javax.crypto.spec.DESedeKeySpec;import org.apache.commons.codec.binary.Base64;/** * * @author y */public class DESUtil {    private static final String CHARSET_TYPE    = "UTF-8";    private static final String ENCRYPT_KEY     = "Z7CKBCcc5KwlZqjbunr1yhZG5nM";    private static final String ENCRYPT_SCHEME  = "DESede";        byte[] keyAsBytes;        private final KeySpec myKeySpec;    private final SecretKeyFactory mySecretKeyFactory;    private final Cipher cipher;    private final SecretKey key;        public DESUtil() throws InvalidKeyException, UnsupportedEncodingException,             NoSuchAlgorithmException, NoSuchPaddingException, InvalidKeySpecException{                keyAsBytes = ENCRYPT_KEY.getBytes(CHARSET_TYPE);        myKeySpec = new DESedeKeySpec(keyAsBytes);        mySecretKeyFactory = SecretKeyFactory.getInstance(ENCRYPT_SCHEME);        cipher = Cipher.getInstance(ENCRYPT_SCHEME);        key = mySecretKeyFactory.generateSecret(myKeySpec);    }        public String encrypt(String unencryptedString) {        String encryptedString = null;        try {            cipher.init(Cipher.ENCRYPT_MODE, key);                        byte[] plainText = unencryptedString.getBytes(CHARSET_TYPE);            byte[] encryptedText = cipher.doFinal(plainText);                        Base64 base64 = new Base64();                        encryptedString = base64.encodeAsString(encryptedText);        } catch (InvalidKeyException ex) {            Logger.getLogger(DESUtil.class.getName()).log(Level.SEVERE, null, ex);        } catch (UnsupportedEncodingException ex) {            Logger.getLogger(DESUtil.class.getName()).log(Level.SEVERE, null, ex);        } catch (IllegalBlockSizeException ex) {            Logger.getLogger(DESUtil.class.getName()).log(Level.SEVERE, null, ex);        } catch (BadPaddingException ex) {            Logger.getLogger(DESUtil.class.getName()).log(Level.SEVERE, null, ex);        }                return encryptedString;    }        public String decrypt(String encryptedString) {        String decryptedText=null;        try {            cipher.init(Cipher.DECRYPT_MODE, key);                        Base64 base64 = new Base64();                        byte[] encryptedText = base64.decode(encryptedString);            byte[] plainText = cipher.doFinal(encryptedText);                        decryptedText = new String(plainText,CHARSET_TYPE);        } catch (InvalidKeyException ex) {            Logger.getLogger(DESUtil.class.getName()).log(Level.SEVERE, null, ex);        } catch (IllegalBlockSizeException ex) {            Logger.getLogger(DESUtil.class.getName()).log(Level.SEVERE, null, ex);        } catch (BadPaddingException ex) {            Logger.getLogger(DESUtil.class.getName()).log(Level.SEVERE, null, ex);        } catch (UnsupportedEncodingException ex) {            Logger.getLogger(DESUtil.class.getName()).log(Level.SEVERE, null, ex);        }                return decryptedText;    }        public static void main(String[] args) throws Exception {        String str = "hello,這是Java DES加密測試資料";                DESUtil desUtil = new DESUtil();                System.out.println("==desc before:"+str);        String encryptStr = desUtil.encrypt(str);        System.out.println("==desc after:"+encryptStr);        System.out.println("==descrypt:"+desUtil.decrypt(encryptStr));    }}

 

Java DES 測試