DES3加密

本是古典何须时尚 2022-04-24 11:14 215阅读 0赞

Des3加密算法是一种对称加密算法。

public class DES3 {
    
        /**
         * 加密
         * @param text 待加密内容
         * @param key 公钥 长度32字符
         * @return
         */
        public static String DESEncrypt(String text, String key) {
            try {
                // 进行DES3加密后的内容的字节
                DESedeKeySpec dks = new DESedeKeySpec(key.getBytes());
                SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DESede");
                SecretKey skey = keyFactory.generateSecret(dks);
                Cipher cipher = Cipher.getInstance("DESede");
                cipher.init(Cipher.ENCRYPT_MODE, skey);
                byte[] encryptedData = cipher.doFinal(text.getBytes("utf-8"));
                // 进行DES3加密后的内容进行BASE64编码
                BASE64Encoder base64en = new BASE64Encoder();
                return base64en.encode(encryptedData);
            } catch (Exception e){
                return text;
            }
        }
    
        /**
         * 解密
         * @param text 待解密内容
         * @param key 公钥
         * @return
         */
        public static String DESDecrypt(String text, String key) {
            try {
                // 进行DES3加密后的内容进行BASE64解码
                BASE64Decoder base64Decode = new BASE64Decoder();
                byte[] base64DValue = base64Decode.decodeBuffer(text);
                // 进行DES3解密后的内容的字节
                DESedeKeySpec dks = new DESedeKeySpec(key.getBytes());
                SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DESede");
                SecretKey skey = keyFactory.generateSecret(dks);
                Cipher cipher = Cipher.getInstance("DESede");
                cipher.init(Cipher.DECRYPT_MODE, skey);
                byte[] encryptedData = cipher.doFinal(base64DValue);
                return new String(encryptedData,"utf-8");
            } catch (Exception e) {
                return text;
            }
        }
    
        public static void main(String[] args) {
            String str=DESEncrypt("1217", "dddaaaaaaaaaaaaaaaaaaaaaaaaaa");
            System.out.println(str);
            String str2=DESDecrypt(str, "dddaaaaaaaaaaaaaaaaaaaaaaaaaa");
            System.out.println(str2);
        }