Files
DodoSSH/tests/DodoSSH.Client.Ssh.Tests
jaap-jan 4c7f47c026 Refuse a pinned host that answers with a key of another type, rather than asking whether to trust it
Pins are stored per algorithm, so an endpoint pinned for ssh-ed25519 that was answered with only an
ECDSA or RSA key found no pin and raised SshHostKeyUnknownException: the first-use question, where a
pin exists to produce a hard refusal. Anybody in the middle needed nothing more than a key of a
different type.

The connection factory now reads every pin for the endpoint before the handshake, offers the pinned
algorithms first so a server that still holds its pinned key negotiates it, and in the gate accepts a
key under an unpinned algorithm only when its fingerprint matches one of the endpoint's pins (one RSA
key signs as rsa-sha2-256 and rsa-sha2-512). Anything else is a mismatch. IKnownHostStore gains
FindForEndpointAsync for this.
2026-10-02 13:16:30 +02:00
..