Java加密算法Triple DES

import javax.crypto.Cipher;    import javax.crypto.KeyGenerator;    import javax.crypto.SecretKey;    import javax.crypto.SecretKeyFactory;    import javax.crypto.spec.DESedeKeySpec;    import javax.crypto.spec.IvParameterSpec;        /**    * 三重加密 3DES也作 Triple DES,    *     * @author stone    * @date 2014-03-10 02:14:37    */    public class TripleDES {        // 算法名称        public static final String KEY_ALGORITHM = "DESede";        // 算法名称/加密模式/填充方式        public static final String CIPHER_ALGORITHM_ECB = "DESede/ECB/PKCS5Padding";        public static final String CIPHER_ALGORITHM_CBC = "DESede/CBC/PKCS5Padding";                private KeyGenerator keyGen;        private SecretKey secretKey;        private SecretKey secretKey2;        private Cipher cipher;        private static byte[] encryptData;                public static void main(String[] args) throws Exception {            TripleDES tripleDES = new TripleDES("ECB");            tripleDES.encrypt("sau8jzxlcvm,'123`98(*^&%^^JCB ZX>>A<S<}}{");            System.out.println("加密后：" + new String(encryptData));            System.out.println("解密后："+ new String(tripleDES.decrypt(encryptData)));                        tripleDES = new TripleDES("CBC");            tripleDES.encrypt2("sau8jzxlc DQV#><«|vm,'123`98(*^&%^^JCB ZX>>A<S<}}{");            System.out.println("加密后：" + new String(encryptData));            System.out.println("解密后："+ new String(tripleDES.decrypt2(encryptData)));        }                public TripleDES(String mode) throws Exception {            if ("ECB".equals(mode)) {    //          cipher = Cipher.getInstance(KEY_ALGORITHM);                cipher = Cipher.getInstance(CIPHER_ALGORITHM_ECB);                keyGen = KeyGenerator.getInstance(KEY_ALGORITHM);                secretKey = keyGen.generateKey();            } else if("CBC".equals(mode)) {                cipher = Cipher.getInstance(CIPHER_ALGORITHM_CBC);                keyGen = KeyGenerator.getInstance(KEY_ALGORITHM);                DESedeKeySpec spec = new DESedeKeySpec(keyGen.generateKey().getEncoded());                secretKey2 = SecretKeyFactory.getInstance(KEY_ALGORITHM).generateSecret(spec);            }        }        /**        * 加密        * @param str        * @return        * @throws Exception        */        public byte[] encrypt(String str) throws Exception {            cipher.init(Cipher.ENCRYPT_MODE, secretKey);            return encryptData = cipher.doFinal(str.getBytes());        }        /**        * 解密        * @param encrypt        * @return        * @throws Exception        */        public byte[] decrypt(byte[] encrypt) throws Exception {            cipher.init(Cipher.DECRYPT_MODE, secretKey);            return encryptData = cipher.doFinal(encrypt);        }        byte[] getIV() {            return "administ".getBytes();        }        /**        * 加密        * @param str        * @return        * @throws Exception        */        public byte[] encrypt2(String str) throws Exception {            cipher.init(Cipher.ENCRYPT_MODE, secretKey2, new IvParameterSpec(getIV()));            return encryptData = cipher.doFinal(str.getBytes());        }        /**        * 解密        * @param encrypt        * @return        * @throws Exception        */        public byte[] decrypt2(byte[] encrypt) throws Exception {            cipher.init(Cipher.DECRYPT_MODE, secretKey2, new IvParameterSpec(getIV()));            return encryptData = cipher.doFinal(encrypt);        }    }
热门搜索

Java加密算法Triple DES
