使用DES对称加密中cbc模式（key值和iv值一致）

加密内容=当前时间戳+#+信用卡号

密钥为appkey的后8位 例如：

CreditCardNO=  des_encrypt(time(). '#240000000000386078', substr($appkey,-8));

测试加密方法 Xcrypt::encrypt( '12345#6789012345', '12345678') == 8e519cf90bf4240f7f653af ff4f6d658f5e402a4ff2581a7

以下是Java版信用卡加密算法：

public class HexUtil {

    public HexUtil() {
    }

    private static final String HEX_CHARS = "0123456789abcdef";

    /**
     * Converts a byte array to hex string.
     *
     * @param bytes the input byte array
     * @return hex string representation of b.
     */
    public static String toHexString(byte[] bytes) {
        StringBuilder buffer = new StringBuilder();
        for (byte aByte : bytes) {
            buffer.append(HexUtil.HEX_CHARS.charAt(aByte >>> 4 & 0x0F));
            buffer.append(HexUtil.HEX_CHARS.charAt(aByte & 0x0F));
        }
        return buffer.toString();
    }

    /**
     * Converts a hex string into a byte array.
     *
     * @param string string to be converted
     * @return byte array converted from s
     */
    public static byte[] toByteArray(String string) {
        byte[] buffer = new byte[string.length() / 2];
        int j = 0;
        for (int i = 0; i < buffer.length; i++) {
            buffer[i] = (byte) ((Character.digit(string.charAt(j++), 16) << 4) | Character.digit(string.charAt(j++), 16));
        }
        return buffer;
    }

    public static String appendParam(String returnStr, String paramId, String paramValue) {
        if (!returnStr.equals("")) {
            if (!paramValue.equals("")) {
                returnStr = returnStr + "&" + paramId + "=" + paramValue;
            }
        } else {
            if (!paramValue.equals("")) {
                returnStr = paramId + "=" + paramValue;
            }
        }
        return returnStr;
    }
}

public class CipherUtil {
 public static final String CHARSET = "UTF-8";
 public static final String KEY_DES = "DES";
 static final String CIPHER_DES = "DES/CBC/PKCS5Padding";
 private static final String HEX_CHARS = "0123456789abcdef";
 
 /**
     * DES对称加密
     *
     * @param content
     * @param password 对称加密的key
     * @return
     * @throws Exception
     */
 public static String desEncrypt(String content,String password) throws Exception{
 SecretKeySpec secretKey=new SecretKeySpec(password.getBytes(CHARSET), KEY_DES);
 Cipher cipher=Cipher.getInstance(CIPHER_DES);
 byte[] byteContent=content.getBytes(CHARSET);
 IvParameterSpec iv=new IvParameterSpec(password.getBytes(CHARSET));
 cipher.init(Cipher.ENCRYPT_MODE, secretKey,iv);
 byte[] result=cipher.doFinal(byteContent);
 return toHexString(result);
 }
 public static String toHexString(byte[] bytes) {
        StringBuilder buffer = new StringBuilder();
        for (byte aByte : bytes) {
            buffer.append(HEX_CHARS.charAt(aByte >>> 4 & 0x0F));
            buffer.append(HEX_CHARS.charAt(aByte & 0x0F));
        }
        return buffer.toString();
    }
 /**
     * DES对称解密
     *
     * @param content
     * @param password 对称加密的key
     * @return
     * @throws Exception
     */
    public static String desDecrypt(String content, String password) throws Exception {
        byte[] bytes = HexUtil.toByteArray(content);
        Cipher cipher = Cipher.getInstance(CIPHER_DES);
        DESKeySpec desKeySpec = new DESKeySpec(password.getBytes(CHARSET));
        SecretKeyFactory keyFactory = SecretKeyFactory.getInstance(KEY_DES);
        SecretKey secretKey = keyFactory.generateSecret(desKeySpec);
        IvParameterSpec iv = new IvParameterSpec(password.getBytes(CHARSET));
        cipher.init(Cipher.DECRYPT_MODE, secretKey, iv);
        byte[] retByte = cipher.doFinal(bytes);
        return new String(retByte);
}

public static void main(String[] args) throws Exception {
    //6e70202d8683a94a51910ce527abea29aa40d01f47f6e136
        //String Number = "6e70202d8683a94a51910ce527abea29aa40d01f47f6e136";
    String timeStamp=String.valueOf(new Date().getTime()/1000);
    //String Number=timeStamp+"#4336660000000000";
    String Number=timeStamp+"#4336660000000000";
        String password = "78d6a4ee";
       // System.out.println("Number 加密前:" + Number);
//        //DES加密
        Number = CipherUtil.desEncrypt(Number, password);
        System.out.println("Number DES加密后：" + Number);
//        System.out.println(result.length());
        //DES加密
            Number = CipherUtil.desDecrypt(Number, password);
        System.out.println("Number DES解密后：" + Number);
       
        String year=timeStamp+"#2016";
        year = CipherUtil.desEncrypt(year, password);
        System.out.println("ExpirationYear DES加密后：" + year);
        year = CipherUtil.desDecrypt(year, password);
        System.out.println("ExpirationYear DES解密后：" + year);
        
        String month=timeStamp+"#6";
        month = CipherUtil.desEncrypt(month, password);
        System.out.println("ExpirationMonth DES加密后：" + month);
        month = CipherUtil.desDecrypt(month, password);
        System.out.println("ExpirationMonth DES解密后：" + month);
        
        String CVV=timeStamp+"#471";
        CVV = CipherUtil.desEncrypt(CVV, password);
        System.out.println("CVV DES加密后：" + CVV);
        CVV = CipherUtil.desDecrypt(CVV, password);
        System.out.println("CVV DES解密后：" + CVV);
        
        String HolderName=timeStamp+"#James White";
        HolderName = CipherUtil.desEncrypt(HolderName, password);
        System.out.println("HolderName DES加密后：" + HolderName);
        HolderName = CipherUtil.desDecrypt(HolderName, password);
        System.out.println("HolderName DES解密后：" + HolderName);
        
        String IdType=timeStamp+"#2";
        IdType = CipherUtil.desEncrypt(IdType, password);
        System.out.println("IdType DES加密后：" + IdType);
        IdType = CipherUtil.desDecrypt(IdType, password);
        System.out.println("IdType DES解密后：" + IdType);
        
        String IdNo=timeStamp+"#4033910000000000";
        IdNo = CipherUtil.desEncrypt(IdNo, password);
        System.out.println("IdNo DES加密后：" + IdNo);
        IdNo = CipherUtil.desDecrypt(IdNo, password);
        System.out.println("IdNo DES解密后：" + IdNo);
        
//        String number0="8c8d2569b1600c5cbd09668ab1b514feeda776b383c07697602862d9cd048f18";
//        String key="78d6a4ee";
//        System.out.println(CipherUtil.desDecrypt(number0, key));
}