Hi,

I am using libfreerdp as part of a bigger application and occasionally
error ERRINFO_DECRYPT_FAILED happens in libfreerdp and connection break. I
have found some older posts that mention this error, but without an exact
method for reproduction or cause of the error.

The error does not happen all the time, it is intermittent. I have managed
to narrow dows the issue and to make the environment where I can reproduce
the issue almost always:

- security: rdp
- gfx:avc444 enabled (I didn't manage to reproduce the issue without
gfx:avc444 enabled)
- graphics pipeline enabled
- remote windows is Win2019 datacenter with GPU

How to reproduce: I have to move mouse rapidly around the desktop (or some
app) and make clicks. After 5-30 seconds the error will happen almost
always. If I don't play with the mouse too much, the session may last for
half an hour in my tests (and it didn't break).

Below are the errors I am getting in the logs:

*****************
ERRINFO_DECRYPT_FAILED (0x00001192):(a) Decryption using Standard RDP
Security mechanisms (section 5.3.6) failed.
(b) Session key creation using Standard RDP Security mechanisms (section
5.3.5) failed.
rdp_set_error_info:freerdp_set_last_error_ex ERRINFO_DECRYPT_FAILED
[0x00011192]
BIO_read returned a system error 104: Connection reset by peer
*****************

The errors are always in this order. Does anybody have an idea what could
be the issue and where to look for the source of the errors? May it be some
settings on the server side (some of the old posts mention that) or maybe a
combination of the freerdp settings? I have tried disabling and enabling
FastPathInput and FastPathOutput, as mentioned in some old posts, but
without success.


Thanks,
Marko

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