** Merge proposal linked: https://code.launchpad.net/~utkarsh/ubuntu/+source/openssh/+git/openssh/+merge/412456
-- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to openssh in Ubuntu. https://bugs.launchpad.net/bugs/1952421 Title: Issue on sshd finds correct private key for a certificate when using ssh-agent Status in openssh package in Ubuntu: Fix Released Status in openssh source package in Focal: New Status in openssh source package in Hirsute: New Status in openssh source package in Impish: New Bug description: Reported as https://bugzilla.mindrot.org/show_bug.cgi?id=3254 upstream: Please take a look at line 1936 in main() function in sshd.c. /* Find matching private key */ for (j = 0; j < options.num_host_key_files; j++) { if (sshkey_equal_public(key, sensitive_data.host_keys[j])) { sensitive_data.host_certificates[j] = key; break; } } the sshkey_equal_public() is trying to compare a cert's pub with a private key, and it never find a match which makes sshd cannot use this certificate even though its private key is in ssh-agent. I believe it should be comparing a cert's public key with a public key in sensitive_data as follow. /* Find matching private key */ for (j = 0; j < options.num_host_key_files; j++) { if (sshkey_equal_public(key, sensitive_data.host_pubkeys[j])) { sensitive_data.host_certificates[j] = key; break; } } https://github.com/openssh/openssh-portable/blob/V_8_4/sshd.c#L1936 Due to this HostCertificate and HostKeyAgent not working together in sshd and this affects every version of openssh back till Focal, at least. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/openssh/+bug/1952421/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp
