Hi,

I'm trying to write a tests program that is able to show the remote key
provided by an SSH server and will eventually ask the user to accept or
decline it. You'll find attached a really simplified version that only
lists the root folder of a server and tries to print the remote key on
screen. I'm just telling curl to use a known_host file and to use my custom
CURLOPT_SSH_KEYFUNCTION (which in the attachment only prints the remote key
and accepts it).

I debugged it and the values provided to ssh_keycallback are:
* match is CURLKHMATCH_MISSING, which is correct since my known_host file
is empty
* knownkey is a null pointer, which is correct for the same reason
* foundkey points to a structure with keytype set to CURLKHTYPE_RSA, len
set to 0x117 and key set to ""

I've got this behaviour both with libcurl 7.38.0 and 7.39.0 in Windows and
with 7.26 en Linux.

Am I doing anything wrong or is it a bug? If I can provide you with more
information just ask for it, I tried debugging libcurl and libssh2 but I
eventually got lost.

Regards,
Rubén

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