Desede Symmetric cryptographic Algorithm tool class

Using Cipher's core function, it encapsulates a cryptographic decryption tool class that can be used directly. You need to download Commons-codec-1.9.jar and import the project before you use it.

The tool classes are as follows:

 Packagecom.pcict.util.test;Importorg.apache.commons.codec.binary.Base64;ImportJavax.crypto.*;ImportJavax.crypto.spec.DESedeKeySpec;ImportJava.nio.charset.Charset;Importjava.security.InvalidKeyException;ImportJava.security.Key;Importjava.security.NoSuchAlgorithmException;ImportJava.security.SecureRandom;Importjava.security.spec.InvalidKeySpecException;Importjava.util.Arrays;/*** Desede symmetric encryption Algorithm * * @Description *@authorLJZ * @created July 31, 2015 Morning 11:30:04 *@version* @history *@see */ Public classDesedeutils {//Encryption Mode     Public Static Final intEncrypt_mode =Cipher.encrypt_mode; //Decryption Mode     Public Static Final intDecrypt_mode =Cipher.decrypt_mode; Private Static FinalString algorithm = "Desede"; Private Static FinalCharset UTF8 = Charset.forname ("UTF-8"); PrivateCipher Cipher =NULL; Private intOpmode = 0; //Initialize encryption or decryption     Public synchronized BooleanInitintmode, String key) {        if(Opmode! = 0) {            return true; }        if(Mode! = Encrypt_mode && Mode! =Decrypt_mode) {            return false; }        if(Key = =NULL||Key.isempty ()) {            return false; }        Try{cipher=cipher.getinstance (algorithm); } Catch(nosuchalgorithmexception e) {//TODO auto-generated Catch blockE.printstacktrace (); } Catch(nosuchpaddingexception e) {//TODO auto-generated Catch blockE.printstacktrace (); } finally {            if(Cipher = =NULL) {                return false; }} Key Seckey=Getseckey (key); if(Seckey = =NULL) {            return false; }        Try{cipher.init (mode, Seckey,Newsecurerandom ()); } Catch(InvalidKeyException e) {//TODO auto-generated Catch blockE.printstacktrace (); return false; } opmode=mode; return true; }    Private StaticKey Getseckey (String key) {Secretkey SecureKey=NULL; Try {            byte[] material =arrays.copyof (Base64.decodebase64 (Key.getbytes (UTF8)),24); Desedekeyspec KeySpec=Newdesedekeyspec (material); Secretkeyfactory keyfactory=secretkeyfactory. getinstance (algorithm); SecureKey=Keyfactory.generatesecret (KEYSPEC); } Catch(InvalidKeyException e) {//TODO auto-generated Catch blockE.printstacktrace (); } Catch(nosuchalgorithmexception e) {//TODO auto-generated Catch blockE.printstacktrace (); } Catch(invalidkeyspecexception e) {//TODO auto-generated Catch blockE.printstacktrace (); }        returnSecureKey; }    //Encrypt     Public synchronizedstring Encrypt (string data) {if(Opmode! =Encrypt_mode) {            return NULL; }        if(Data = =NULL) {            return NULL; }        byte[] Encdata =NULL; Try{encdata=cipher.dofinal (Data.getbytes (UTF8)); } Catch(illegalblocksizeexception e) {//TODO auto-generated Catch blockE.printstacktrace (); } Catch(badpaddingexception e) {//TODO auto-generated Catch blockE.printstacktrace (); }        if(Encdata = =NULL) {            return NULL; }        return NewString (Base64.encodebase64 (encdata), UTF8); }    //decryption     Public synchronizedstring Decrypt (string data) {if(Opmode! =Decrypt_mode) {            return NULL; }        if(Data = =NULL) {            return NULL; }        byte[] Decdata =NULL; Try{decdata=cipher.dofinal (Base64.decodebase64 (Data.getbytes (UTF8))); } Catch(illegalblocksizeexception e) {//TODO auto-generated Catch blockE.printstacktrace (); } Catch(badpaddingexception e) {//TODO auto-generated Catch blockE.printstacktrace (); }        if(Decdata = =NULL) {            return NULL; }        return NewString (Decdata, UTF8); }}

The test is as follows:

 Packagecom.pcict.util.test; Public classTest { Public Static voidMain (string[] args) {desedeutils encoder=Newdesedeutils (); String Key= "123456"; //with 123456 as the encryption key, in the back of the decryption will also use the key as the decryption keyEncoder.init (Desedeutils.encrypt_mode, key); String Str= Encoder.encrypt ("1");        System.out.println (str); Desedeutils Decoder=Newdesedeutils (); //call the initial dissolve secretDecoder.init (Desedeutils.decrypt_mode, key); String str1=Decoder.decrypt (str);    System.out.println (STR1); }}

Desede Symmetric cryptographic Algorithm tool class