Java implementation of AES encryption and decryption algorithm

Implementation of AES encryption and decryption algorithm in original Java

ImportJavax.crypto.Cipher;ImportJavax.crypto.spec.IvParameterSpec;ImportJavax.crypto.spec.SecretKeySpec;ImportSun.misc.BASE64Decoder;ImportSun.misc.BASE64Encoder;/*** AES is a reversible encryption algorithm, the user's sensitive information encryption processing * to the original data AES encryption, in the Base64 encoding conversion;*/ Public classAesoperator {/** Encryption key can be composed of 26 letters and numbers * Here use AES-128-CBC encryption mode, key needs to be 16 bits. */    PrivateString SKey = "0123456789abcdef"; PrivateString ivparameter = "0123456789abcdef"; Private StaticAesoperator instance =NULL; PrivateAesoperator () {} Public Staticaesoperator getinstance () {if(Instance = =NULL) Instance=NewAesoperator (); returninstance; }    //Encrypt     PublicString Encrypt (String sSrc)throwsException {Cipher Cipher= Cipher.getinstance ("aes/cbc/pkcs5padding"); byte[] Raw =skey.getbytes (); Secretkeyspec Skeyspec=NewSecretkeyspec (Raw, "AES"); Ivparameterspec IV=NewIvparameterspec (Ivparameter.getbytes ());//using CBC mode, a vector IV is required to increase the strength of the encryption algorithmCipher.init (Cipher.encrypt_mode, Skeyspec, iv); byte[] encrypted = Cipher.dofinal (Ssrc.getbytes ("Utf-8")); return NewBase64encoder (). Encode (encrypted);//transcoding is done here using BASE64.     }    //decryption     PublicString Decrypt (String sSrc)throwsException {Try {            byte[] raw = Skey.getbytes ("ASCII"); Secretkeyspec Skeyspec=NewSecretkeyspec (Raw, "AES"); Cipher Cipher= Cipher.getinstance ("aes/cbc/pkcs5padding"); Ivparameterspec IV=NewIvparameterspec (Ivparameter.getbytes ());            Cipher.init (Cipher.decrypt_mode, Skeyspec, iv); byte[] encrypted1 =NewBase64decoder (). Decodebuffer (SSRC);//first decrypt with Base64 .            byte[] Original =cipher.dofinal (encrypted1); String originalstring=NewString (Original, "Utf-8"); returnoriginalstring; } Catch(Exception ex) {return NULL; }    }     Public Static voidMain (string[] args)throwsException {//strings that need to be encryptedString CSRC = "I'm from Www.wenhq.com"; System.out.println (CSRC);//Encrypt        LongLstart =System.currenttimemillis (); String enstring=aesoperator.getinstance (). Encrypt (CSRC); System.out.println ("The encrypted string is:" +enstring); LongLusetime = System.currenttimemillis ()-Lstart; System.out.println ("Encryption Time:" + Lusetime + "milliseconds");//decryptionLstart =System.currenttimemillis (); String destring=aesoperator.getinstance (). Decrypt (enstring); System.out.println ("The decrypted string is:" +destring); Lusetime= System.currenttimemillis ()-Lstart; System.out.println ("Decryption Time:" + Lusetime + "milliseconds"); }}

Java implementation of AES encryption and decryption algorithm