[UWP]AES Encryption

Question

I'm trying to encrypt Strings with AES and I found a way to do it under Windows 8.1 with System.Security.Cryptography.AES...

But that's not existing under Windows 10 and there is nothing under Windows.Security.Cryptography...

Answer 1

Hi soeren_G,

>>But that's not existing under Windows 10 and there is nothing under Windows.Security.Cryptography...

System.Security.Cryptography namespace is available in traditional desktop application, but not for UWP apps.

In UWP apps, to implement AES Encryption, we need to use the following namespaces:

Windows.Security.Cryptography namespace & Windows.Security.Cryptography.Core namespace

See also this similar thread: https://social.msdn.microsoft.com/Forums/en-US/52080335-0016-4370-889b-3afe0c0dcb7a/how-to-do-simple-aes-encryptiondecryption-in-metro?forum=winappswithcsharp

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Answer 2

I am not very well versed in encryption code and have never written a UWP app before. I have this function from a desktop app I wrote, is there anyone who can please help me convert this to UWP with the correct namespaces?

Imports System.Security.Cryptography
Imports System.IO
Imports System.Text

Public Function EncryptString_Aes(ByVal plainText As String) As String
        Dim sb As StringBuilder = New StringBuilder()
        ' Create an AesCryptoServiceProvider object
        ' with the specified key and IV.
        Using aesAlg As New AesCryptoServiceProvider()

            aesAlg.Key = aesKey
            aesAlg.GenerateIV()

            ' Create a decrytor to perform the stream transform.
            Dim encryptor As ICryptoTransform = aesAlg.CreateEncryptor(aesAlg.Key, aesAlg.IV)

            ' Create the streams used for encryption.
            Dim msEncrypt As New MemoryStream()

            Using csEncrypt As New CryptoStream(msEncrypt, encryptor, CryptoStreamMode.Write)
                Using swEncrypt As New StreamWriter(csEncrypt)
                    'Write all data to the stream.
                    swEncrypt.Write(plainText)
                End Using
                sb.Append(BitConverter.ToString(aesAlg.IV))
                sb.Append(BitConverter.ToString(msEncrypt.ToArray))
            End Using
        End Using

        Return sb.ToString.Replace("-", "")
    End Function

aesKey is a public variable of byte(32) that has the current key in memory

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Gary Ritter - Nokia Lumia