B4J Question [B4X] B4XCipher how to decrypt the result in vb.net

[Alexander Stolte]

Does anyone know how i can decrypt in vb.net the aes encrypted string i have encrypted with the B4XCipher?

    Dim s As StringUtils
    Log(s.EncodeBase64(EncryptText("Test123!","1234")))

Sub EncryptText(text As String, password As String) As Byte()
    Dim c As B4XCipher
    Return c.Encrypt(text.GetBytes("utf8"), password)
End Sub

su3U1EJ7W8pnUO2Fq9eC0zGgeh8T/qp9gdjbZoTjeNjp1MGWTCgffQ==

 

[EnriqueGonzalez]

You can't. B4xencryption doesn't provide the salting bytes and doesn't provide the algorithm. If you want cross compatibility you need the encryption library

 

[EnriqueGonzalez]

Okey it seems that the docs contains all the info

B4A/Libs_B4XEncryption/src/anywheresoftware/b4a/object/B4XEncryption.java at master · AnywhereSoftware/B4A

B4A core libraries. Contribute to AnywhereSoftware/B4A development by creating an account on GitHub.

github.com

There comes the algorithm and it seems that the IV and salt are just empty.

 

[Alexander Stolte]

thanks i will have a look

 

[Erel]

Many wrong statements here.

The algorithm is open: https://github.com/AnywhereSoftware...nywheresoftware/b4a/object/B4XEncryption.java
The salt and IV are chosen randomly are are stored at the beginning of the encrypted message.

Does anyone know how i can decrypt in vb.net the aes encrypted string i have encrypted with the B4XCipher?

C# implementation: https://github.com/chrisleeuk/B4XEncryption.net (I haven't tested it myself).

B4XEncryption .net DLL class library

Hi All, I recently had the need to send encrypted data from my B4A/B4J/B4i apps to a .net web service. Because the B4XEncryption library works in all the B4X environments, I wanted a way to decrypt and encrypt data in the same way as the B4XEncryption libraries do. Details of the B4XEncryption...

www.b4x.com

 

[MicroDrie]

You could also check if the AES Encrypt/Decrypt (Encryption/Decryption) B4A and B4J library is usable for you.
Peter Simpson uses it for B4A, B4J, VB.NET and C#.