Şifre oluşturma şifreyi çözme Encrypt and Dencrypt

6H0LHAjU3+xYPdeC6owmtA== 

 
  Public Function Encrypt(plainText As String, passPhrase As String, saltValue As String, passwordIterations As Integer, initVector As String, keySize As Integer) As String 
          Dim initVectorBytes As Byte() = Encoding.ASCII.GetBytes(initVector) 
          Dim saltValueBytes As Byte() = Encoding.ASCII.GetBytes(saltValue) 
          Dim plainTextBytes As Byte() = Encoding.UTF8.GetBytes(plainText) 
          Dim password As New Rfc2898DeriveBytes(passPhrase, saltValueBytes, passwordIterations) 
          Dim keyBytes As Byte() = password.GetBytes(keySize / 8) 
          Dim symmetricKey As New RijndaelManaged() 
          symmetricKey.Mode = CipherMode.CBC 
          Dim encryptor As ICryptoTransform = symmetricKey.CreateEncryptor(keyBytes, initVectorBytes) 
          Dim memoryStream As New MemoryStream() 
          Dim cryptoStream As New CryptoStream(memoryStream, encryptor, CryptoStreamMode.Write) 
          cryptoStream.Write(plainTextBytes, 0, plainTextBytes.Length) 
          cryptoStream.FlushFinalBlock() 
          Dim cipherTextBytes As Byte() = memoryStream.ToArray() 
          memoryStream.Close() 
          cryptoStream.Close() 
          Dim cipherText As String = Convert.ToBase64String(cipherTextBytes) 
          Return cipherText 
      End Function 
      Public Function Decrypt(cipherText As String, passPhrase As String, saltValue As String, passwordIterations As Integer, initVector As String, keySize As Integer) As String 
          Dim initVectorBytes As Byte() = Encoding.ASCII.GetBytes(initVector) 
          Dim saltValueBytes As Byte() = Encoding.ASCII.GetBytes(saltValue) 
          Dim cipherTextBytes As Byte() = Convert.FromBase64String(cipherText) 
          Dim password As New Rfc2898DeriveBytes(passPhrase, saltValueBytes, passwordIterations) 
          Dim keyBytes As Byte() = password.GetBytes(keySize / 8) 
          Dim symmetricKey As New RijndaelManaged() 
          symmetricKey.Mode = CipherMode.CBC 
          Dim decryptor As ICryptoTransform = symmetricKey.CreateDecryptor(keyBytes, initVectorBytes) 
          Dim memoryStream As New MemoryStream(cipherTextBytes) 
          Dim cryptoStream As New CryptoStream(memoryStream, decryptor, CryptoStreamMode.Read) 
          Dim plainTextBytes As Byte() = New Byte(cipherTextBytes.Length) {} 
          Dim decryptedByteCount As Integer = cryptoStream.Read(plainTextBytes, 0, plainTextBytes.Length) 
          memoryStream.Close() 
          cryptoStream.Close() 
          Dim plainText As String = Encoding.UTF8.GetString(plainTextBytes, 0, decryptedByteCount) 
          Return plainText 
      End Function