Java對稱式加密演算法DES實現

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import java.util.Base64;import javax.crypto.Cipher;import javax.crypto.SecretKey;import javax.crypto.SecretKeyFactory;import javax.crypto.spec.DESKeySpec;import javax.crypto.spec.IvParameterSpec;public class SecurityUtil {        private static final String PASSWORD = "DES20170726202423156END";    private static final String ALGORITHM = "DES/CBC/PKCS5Padding";    private static final byte[] iv = {1,2,3,4,5,6,7,8};        /**     * 加密     * @param data     * @return     * @throws Exception     */    public static String encrypt(String data) throws Exception{        if(data==null||data.length()==0){            return "";        }        IvParameterSpec param = new IvParameterSpec(iv);        DESKeySpec desKey = new DESKeySpec(PASSWORD.getBytes());        SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DES");        SecretKey secretKey = keyFactory.generateSecret(desKey);                Cipher cipher = Cipher.getInstance(ALGORITHM);        cipher.init(Cipher.ENCRYPT_MODE, secretKey, param);        byte[] bytes = cipher.doFinal(data.getBytes());        return Base64.getEncoder().encodeToString(bytes);    }        /**     * 解密     * @param data     * @return     * @throws Exception     */    public static String decrypt(String data) throws Exception{        if(data==null||data.length()==0){            return "";        }        IvParameterSpec param = new IvParameterSpec(iv);        DESKeySpec desKey = new DESKeySpec(PASSWORD.getBytes());        SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DES");        SecretKey secretKey = keyFactory.generateSecret(desKey);                Cipher cipher = Cipher.getInstance(ALGORITHM);        cipher.init(Cipher.DECRYPT_MODE, secretKey, param);        byte[] bytes = cipher.doFinal(Base64.getDecoder().decode(data.getBytes()));                return new String(bytes);    }

 

Java對稱式加密演算法DES實現