Padding is invalid and cannot be removed.

[pcampion1]

After using this package successfully for a while now, I am suddenly getting this message when decrypting. If I specify padding as None when decrypting then I get most of the message decrypted with some garbage at the end of each line.

Any ideas?

[Tom-Kuhn]

The encryption settings need to be the same for the encryption and the description process. From the description, the most likely issue that you're facing is that the encryption is performed with one padding configuration value and the decrypting is being performed with a different padding corrugation value. Can you make sure that you are using the same padding configuration for both encryption and decryption? Did this help resolve your issue?

[pcampion1]

We are definitely using the same key. All along we have left the padding at the default ISO10126. When we decrypt using padding of None we end up with a valid decrypted message but with some garbage at the end of the message. Here is an example

2019-09-02 14:37:25,429 INFO Portal_Push_MPC.Form1 [Form1_Load (0)]- Application Started�4����p�%�c

It is a real mystery how this problem suddenly presented in our main project while in a test project it is still working fine. So we are managing by decrypting in this manner with the minor inconvenience of garbage data added to the end.

Does the version of log4net make a difference? We are using 2.08.

[Tom-Kuhn]

The version of log4net shouldn't make a difference, all the encryption is handled by simple.aes.

Can you post your encryption and decryption config (obviously making sure that you remove the encryption key!)?

This still feels like a configuration problem and not a library issue as there haven't been any reports of any similar issues. I would recommend double checking your test config (both encryption and decryption) against your production config (both encryption and decryption) to see if you can spot any differences.