Android Question AES encryption from Windows and ecoding on B4A

[Ekcentrik]

Hi,
I am using a component from this company http://www.nsoftware.com/ipworks/encrypt/
Using AES library I encrypt data on a Windows program.
I need to decode the information on B4A android application.
Input text: Basic4Android
Output from Windows app : 22416A4940CCFCF0B2FD7559AA9C8179
Password: password

This is a function I adapted to decode the text:

Sub Decrypt(encryptedData As String ) As String

Dim kg As KeyGenerator
Dim c As Cipher
Dim B64 As Base64
Dim Bconv As ByteConverter
Dim data(0) As Byte

Dim p As String
Dim md As MessageDigest

c.Initialize("AES/CBC/PKCS5Padding")
kg.Initialize("AES")

p = "password"
kg.KeyFromBytes(p.GetBytes("UTF8"))

data = B64.DecodeStoB(encryptedData)
data = c.Decrypt(data, kg.Key, False)

Return Bconv.StringFromBytes(data, "UTF8")

End Sub

This functionis called like that : Decrypt("22416A4940CCFCF0B2FD7559AA9C8179")
I am expecting to have back the text Basic4Android

Here is the error message I am getting:
java.security.InvalidKeyException: no IV set when one expected.

Where am I wrong ?

Thank you for your help.

Marcel.

 

[Erel]

Please use [code]code here...[/code] tags when posting code.

The simplest way is to use B4J on the desktop and use B4XEncryption to encrypt the data.

You need to set Cipher.InitializationVector (CBC requires it).