Android----Java des encryption Algorithm Tool class

1  Packageentity;2 3 ImportJavax.crypto.Cipher;4 ImportJavax.crypto.SecretKey;5 Importjavax.crypto.SecretKeyFactory;6 ImportJavax.crypto.spec.DESKeySpec;7 ImportJavax.crypto.spec.IvParameterSpec;8 9  Public classDes {Ten     Private byte[] deskey;  One        A      -     //Decrypt Data -      Public StaticString decrypt (string message,string key)throwsException { the              -             byte[] Bytesrc =converthexstring (message);  -Cipher Cipher = cipher.getinstance ("des/cbc/pkcs5padding");  -Deskeyspec Deskeyspec =NewDeskeyspec (Key.getbytes ("UTF-8"));  +Secretkeyfactory keyfactory = secretkeyfactory.getinstance ("DES");  -Secretkey Secretkey =Keyfactory.generatesecret (DESKEYSPEC);  +Ivparameterspec IV =NewIvparameterspec (Key.getbytes ("UTF-8"));  A                     at Cipher.init (Cipher.decrypt_mode, Secretkey, iv);  -               -             byte[] Retbyte =cipher.dofinal (BYTESRC);  -             return NewString (Retbyte);  -     }    -    in      Public Static byte[] Encrypt (String message, string key) -             throwsException { toCipher Cipher = cipher.getinstance ("des/cbc/pkcs5padding");  +    -Deskeyspec Deskeyspec =NewDeskeyspec (Key.getbytes ("UTF-8"));  the    *Secretkeyfactory keyfactory = secretkeyfactory.getinstance ("DES");  $Secretkey Secretkey =Keyfactory.generatesecret (DESKEYSPEC); Panax NotoginsengIvparameterspec IV =NewIvparameterspec (Key.getbytes ("UTF-8"));  - Cipher.init (Cipher.encrypt_mode, Secretkey, iv);  the    +         returnCipher.dofinal (Message.getbytes ("UTF-8"));  A     }    the         +      Public Static byte[] converthexstring (String ss) -     {     $     byteDigest[] =New byte[Ss.length ()/2];  $      for(inti = 0; i < digest.length; i++)     -     {     -String byteString = ss.substring (2 * I, 2 * i + 2);  the     intBytevalue = Integer.parseint (byteString, 16);  -Digest[i] = (byte) Bytevalue; Wuyi     }     the    -     returnDigest;  Wu     }     -      About      Public StaticString tohexstring (byteb[]) {    $StringBuffer hexstring =NewStringBuffer ();  -          for(inti = 0; i < b.length; i++) {    -String plaintext = integer.tohexstring (0xFF &B[i]);  -             if(Plaintext.length () < 2)    Aplaintext = "0" +plaintext;  + hexstring.append (plaintext);  the         }    -             $         returnhexstring.tostring ();  the     }    the    the    the      Public Static voidMain (string[] args)throwsException { -String key = "12345678";  inString value= "test1234";  theString Jiami=java.net.urlencoder.encode (value, "Utf-8"). toLowerCase ();  the             AboutSYSTEM.OUT.PRINTLN ("Encrypt data:" +Jiami);  theString a=tohexstring (Encrypt (Jiami, key)). toUpperCase ();  theSYSTEM.OUT.PRINTLN ("Encrypted data is:" +a);  the          +          -String B=java.net.urldecoder.decode (Decrypt (A,key), "Utf-8") ;  theSYSTEM.OUT.PRINTLN ("Decrypted data:" +b); Bayi    the     }    the    -         -      the}

Android----Java des encryption Algorithm Tool class