C # AES Encryption algorithm

1 /// <summary>2         ///AES Encryption algorithm for aes/cbc/pkcs5padding pattern in Java3         /// </summary>4         /// <param name= "S" >string to encrypt</param>5         /// <param name= "SKey" >secret key</param>6         /// <returns></returns>7          Public Static stringAesencrypt (stringSstringSKey)8         {9Aescryptoserviceprovider Provider =NewAescryptoserviceprovider ();Ten             if(SKey = =NULL) One             { A                 Throw NewException ("key is empty null"); -             } -             //determine if key is 16-bit the             if(Skey.length! = -) -             { -                 Throw NewException ("key length is not 16 bits"); -             } +             byte[] bytes =Encoding.UTF8.GetBytes (s); -Provider. Key =Encoding.UTF8.GetBytes (SKey); +PROVIDER.IV = Encoding.UTF8.GetBytes ("0102030405060708"); AMemoryStream stream =NewMemoryStream (); atCryptoStream stream2 =NewCryptoStream (stream, provider. CreateEncryptor (), cryptostreammode.write); -Stream2. Write (Bytes,0, Bytes. Length); - stream2. FlushFinalBlock (); -StringBuilder Builder =NewStringBuilder (); -             foreach(byteNuminchStream. ToArray ()) -             { inBuilder. AppendFormat ("{0:x2}", num); -             } to Builder. ToString (); + stream2. Close (); - Stream. Close (); the             returnBuilder. ToString (); *         } $ Panax Notoginseng         /// <summary> -         ///AES decryption algorithm for aes/cbc/pkcs5padding pattern in Java the         /// </summary> +         /// <param name= "S" >string to decrypt</param> A         /// <param name= "SKey" >secret key</param> the         /// <returns></returns> +          Public Static stringAesdecrypt (stringSstringSKey) -         { $Aescryptoserviceprovider Provider =NewAescryptoserviceprovider (); $             byte[] buffer =New byte[S.length/2]; -              for(inti =0; I < (s.length/2); i++) -             { the                 intnum2 = Convert.ToInt32 (s.substring (i *2,2),0x10); -Buffer[i] = (byte) num2;Wuyi             } theProvider. Key =Encoding.UTF8.GetBytes (SKey); -PROVIDER.IV = Encoding.UTF8.GetBytes ("0102030405060708"); WuMemoryStream stream =NewMemoryStream (); -CryptoStream stream2 =NewCryptoStream (stream, provider. CreateDecryptor (), cryptostreammode.write); AboutStream2. Write (Buffer,0, buffer. Length); $ stream2. FlushFinalBlock (); -StringBuilder Builder =NewStringBuilder (); - stream2. Close (); - Stream. Close (); A             returnEncoding.Default.GetString (stream. ToArray ()); +}

C # AES Encryption algorithm