JS front-end 3DES encryption background Java decryption

Import Java.security.key;import Java.security.securerandom;import Javax.crypto.cipher;import Javax.crypto.secretkeyfactory;import Javax.crypto.spec.desedekeyspec;import Sun.misc.base64decoder;import    Sun.misc.BASE64Encoder;        /** * DES encryption decryption * * @author * * */public class Desencrypt {key key; Public desencrypt (String str) {setkey (str);//Generate secret key} public Desencrypt () {Setkey ("abc123.*      Abc123.*abc123.*abc123.* ");            /** * Generates key based on parameter */public void Setkey (String strkey) {try {//Contrast des              Secretkeyfactory keyfactory = secretkeyfactory.getinstance ("Desede");          This.key = Keyfactory.generatesecret (New Desedekeyspec (Strkey.getbytes ("UTF8")); } catch (Exception e) {throw new RuntimeException ("Error Initializing Sqlmap class.          Cause: "+ e); }}/** * Encrypt string plaintext input, string ciphertext output */public StrinG Encrypt (String strming) {byte[] Bytemi = null;          byte[] byteming = null;          String strmi = "";          Base64encoder base64en = new Base64encoder ();              try {byteming = strming.getbytes ("UTF8");              Bytemi = This.getenccode (byteming);          Strmi = Base64en.encode (Bytemi); } catch (Exception e) {throw new RuntimeException ("Error Initializing Sqlmap class.          Cause: "+ e);              } finally {base64en = null;              byteming = null;          Bytemi = null;      } return Strmi; /** * Decrypted with string cipher input, string plaintext output * * @param strmi * @return */public String D          Ecrypt (String strmi) {Base64decoder base64de = new Base64decoder ();          byte[] byteming = null;          byte[] Bytemi = null;          String strming = "";             try {Bytemi = Base64de.decodebuffer (Strmi); byteming = This.getdescode (Bytemi);          strming = new String (byteming, "UTF8"); } catch (Exception e) {throw new RuntimeException ("Error Initializing Sqlmap class.          Cause: "+ e);              } finally {base64de = null;              byteming = null;          Bytemi = null;      } return strming; }/** * Encrypted with byte[] plaintext input, byte[] ciphertext output * * @param byteS * @return */private byte[] G          Etenccode (byte[] byteS) {byte[] Bytefina = null;          Cipher Cipher;              try {//contrast des cipher = cipher.getinstance ("Desede");              Cipher.init (Cipher.encrypt_mode, Key,securerandom.getinstance ("sha1prng"));          Bytefina = Cipher.dofinal (ByteS); } catch (Exception e) {throw new RuntimeException ("Error Initializing Sqlmap class.          Cause: "+ e);          } finally {cipher = NULL;} return Bytefina; }/** * decrypted with byte[] ciphertext input, byte[] Clear Text Output * * @param byted * @return */private byte[]          Getdescode (byte[] byted) {Cipher Cipher;          byte[] Bytefina = null;              try {//contrast des cipher = cipher.getinstance ("Desede");              Cipher.init (Cipher.decrypt_mode, Key,securerandom.getinstance ("sha1prng"));          Bytefina = Cipher.dofinal (byted); } catch (Exception e) {throw new RuntimeException ("Error Initializing Sqlmap class.          Cause: "+ e);          } finally {cipher = NULL;      } return Bytefina;            } public static void Main (String args[]) {desencrypt des = new desencrypt ();          String str1 = "asssaaasss.*/";          DES encryption String str2 = Des.encrypt (STR1);          Desencrypt des1 = new Desencrypt ();          String destr = Des1.decrypt (STR2); System.out.priNtln ("Ciphertext:" + str2);           Des decryption System.out.println ("Clear text:" + destr);   }    }

Des has a key length of 8 bits and a 3DES key length of 32 bits.

3DES key Material key factory, encryption algorithm is different.

Front-end JS encryption

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JS front-end 3DES encryption background Java decryption