Java DES encryption and decryption

 Public classDes {/*** Encrypt the given string with the specified encoding and key *@paramSRCSTR string to encrypt *@paramCharSet character set, such as UTF8 *@paramSKey Key*/     Public Staticstring Encrypt (String srcstr, Charset Charset, String sKey) {byte[] src =srcstr.getbytes (CharSet); byte[] buf =des.encrypt (SRC, sKey); returndes.parsebyte2hexstr (BUF); }    /*** Decryption of a given cipher with the specified encoding and key *@paramHexstr need to decrypt the ciphertext *@paramCharSet Character Set *@paramSKey Key *@returnthe original text after decryption *@throwsException*/     Public StaticString Decrypt (String hexstr, Charset Charset, String sKey)throwsException {byte[] src =Des.parsehexstr2byte (HEXSTR); byte[] buf =des.decrypt (SRC, sKey); return NewString (buf, CharSet); }     Public Static byte[] Encrypt (byte[] data, String SKey) {        Try {            byte[] key =skey.getbytes (); Ivparameterspec IV=NewIvparameterspec (key); Deskeyspec Deskey=NewDeskeyspec (key); Secretkeyfactory keyfactory= Secretkeyfactory.getinstance ("DES"); Secretkey SecureKey=Keyfactory.generatesecret (Deskey); Cipher Cipher= Cipher.getinstance ("des/cbc/pkcs5padding");            Cipher.init (Cipher.encrypt_mode, SecureKey, iv); returncipher.dofinal (data); } Catch(Throwable e) {e.printstacktrace (); }        return NULL; }    /*** Decryption *@paramsrc *@paramSKey *@return     * @throwsException*/     Public Static byte[] Decrypt (byte[] src, String sKey)throwsException {byte[] key =skey.getbytes (); //initialization VectorIvparameterspec IV =NewIvparameterspec (key); //Create a Deskeyspec objectDeskeyspec Deskey =NewDeskeyspec (key); //Create a key factorySecretkeyfactory keyfactory = secretkeyfactory.getinstance ("DES"); //convert Deskeyspec objects to Secretkey objectsSecretkey SecureKey =Keyfactory.generatesecret (Deskey); //The cipher object actually completes the decryption operationCipher Cipher = cipher.getinstance ("des/cbc/pkcs5padding"); //Initialize the Cipher object with a keyCipher.init (Cipher.decrypt_mode, SecureKey, iv); //actually start the decryption operation        returncipher.dofinal (SRC); }    /*** Convert binary to 16 binary * *@paramBUF *@return     */     Public StaticString Parsebyte2hexstr (bytebuf[]) {StringBuffer SB=NewStringBuffer ();  for(inti = 0; i < buf.length; i++) {String hex= Integer.tohexstring (Buf[i] & 0xFF); if(hex.length () = = 1) {hex= ' 0 ' +Hex;        } sb.append (Hex.touppercase ()); }        returnsb.tostring (); }    /*** Convert 16 binary to binary * *@paramHexstr *@return     */     Public Static byte[] Parsehexstr2byte (String hexstr) {if(Hexstr.length () < 1)return NULL; byte[] result =New byte[Hexstr.length ()/2];  for(inti = 0; I < Hexstr.length ()/2; i++) {            intHigh = Integer.parseint (Hexstr.substring (i * 2, I * 2 + 1), 16); intLow = Integer.parseint (Hexstr.substring (i * 2 + 1, I * 2 + 2), 16); Result[i]= (byte) (High * 16 +Low ); }        returnresult; }} 

Use:

    @RequestMapping ("/encode")    public  string encode (string data) {        return Des.encrypt (data, Charset.forname ("UTF8"), "Testtest");    }        @RequestMapping ("/decode")    publicthrows  exception{         return Des.decrypt (data, Charset.forname ("UTF8"), "Testtest");    }

This is not the point of use in the controller of the sprint boot, the point is:

Des.encrypt (data, Charset.forname ("UTF8"), "testtest");

Des.decrypt (data, Charset.forname ("UTF8"), "testtest");

The invocation of the above two methods.

Reference from: https://www.cnblogs.com/james0/p/7063941.html

Java DES encryption and decryption