Background:

1, Based on security considerations,electronic vouchers are used in The code returned by the getOrderCodes interface is signed ,, but the code vendor must rely on this interface to compare with its own library The code , is written off, , whether is expired, etc. to make the next business decision,So provide encryption and decryption algorithm documents to code vendors

demo:

public class TripleDes {
   private static final String Algorithm = "DESede/CBC/PKCS5Padding"; // 定义
   
   private static final String secret = "xxxxxxxxxxxxxxxxxxxxxxxxxxxx"; // 码商入驻给的密钥,如果遗忘了,请联系内部当时码商入驻接口人.
   
 
   /**
    * 加密
    * 
    * @param src
    *            需要加密的字符串
    * @param secret
    *            密钥，24字节
    */
   public static String encrypt(String src, String secret) {
      if (StringUtils.isEmpty(src) || StringUtils.isEmpty(secret)
            || secret.length() != 24) {
         return src;
      }
 
      try {
         // 生成密钥
         SecretKey deskey = new SecretKeySpec(secret.getBytes(), "DESede");
 
         // 加密
         Cipher c1 = Cipher.getInstance(Algorithm);
         IvParameterSpec iv = new IvParameterSpec(secret.substring(0, 8)
                .getBytes());
         c1.init(Cipher.ENCRYPT_MODE, deskey, iv);
         BASE64Encoder base64 = new BASE64Encoder();
         return base64.encode(c1.doFinal(src.getBytes()));
      } catch (java.security.NoSuchAlgorithmException e1) {
      } catch (javax.crypto.NoSuchPaddingException e2) {
      } catch (java.lang.Exception e3) {
      }
      return null;
   }
 
   /**
    * 解密
    * 
    * @param src
    *            需要解密的字符串
    * @param secret
    *            密钥，24字节
    */
   public static String decrypt(String src, String secret) {
      if (StringUtils.isEmpty(src) || StringUtils.isEmpty(secret)
            || secret.length() != 24) {
         return src;
      }
 
      try {
         // 生成密钥
         SecretKey deskey = new SecretKeySpec(secret.getBytes(), "DESede");
         Cipher c1 = Cipher.getInstance(Algorithm);
         IvParameterSpec iv = new IvParameterSpec(secret.substring(0, 8)
                .getBytes());
         c1.init(Cipher.DECRYPT_MODE, deskey, iv);
         BASE64Decoder base64 = new BASE64Decoder();
         return new String(c1.doFinal(base64.decodeBuffer(src)));
      } catch (java.security.NoSuchAlgorithmException e1) {
      } catch (javax.crypto.NoSuchPaddingException e2) {
      } catch (java.lang.Exception e3) {
      }
      return null;
   }
 
   public static void main(String[] args) {
      String code = "xxxxxxxxxxxxxxxxxxxxx";// 加密过的码
      String newSecret = secret.substring(0, 24);//加密串取前24位,这个请务必注意.
      System.out.println(new String(TripleDes.decrypt(code, newSecret)));// 解密
      System.out.println(new String(TripleDes.encrypt(
            TripleDes.decrypt(code, newSecret), newSecret))); // 加密
 
   }
}

FAQ

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