Bug 1952 – Support rsa-sha2-256 and rsa-sha2-512 SSH public key algorithms
Child of Bug 1984.
OpenSSH 8.8 disabled
ssh-rsaby default. Until WinSCP 5.20 is released, add this to server's
sshd_configto re-enable it:
Emails with Максим Курносенко.
Emails with Tiago Costa.
The problem manifests as "Server refused our key".
WinSCP 5.19.5 will log a reference to this bug, when an OpenSSH 8.8 (or newer) server refuses the key.
Bug 1980 has been marked as a duplicate of this bug.