Last working version : 5.15.9
OS Version : Windows 10 x64
UI mode : commander
remote server only uses AES for encryption, curve X25519 for key exchange.
private/public key pair is RSA, 3072-bit.
Steps to reproduce :
Open WinSCP, type in the IP and username, go to Advanced->ssh->authentication, select key file (ppk), click connect
Expected result :
Successful connection, as in 5.15.9 and below, with the exact same server and keypair.
Actual result :
Error message that winSCP cannot authenticate "cannot create key".
If WinSCP uses a PuTTY library, it is entirely possible that the bug comes from PuTTY, because we also had to downgrade it, as our keys were also causing problems on latest versions. However, this is only speculation.
Thanks in advance for any help/resolution , in the meantime we downgraded back to 5.15.9