upstream commit

mention AuthorizedKeysCommandUser must be set for
 AuthorizedKeysCommand to be run; bz#2287

sshd_config.5

@@ -33,8 +33,8 @@
 .\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 .\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 .\"
-.\" $OpenBSD: sshd_config.5,v 1.180 2014/11/22 19:21:03 jmc Exp $
-.Dd $Mdocdate: November 22 2014 $
+.\" $OpenBSD: sshd_config.5,v 1.181 2014/12/11 05:25:06 djm Exp $
+.Dd $Mdocdate: December 11 2014 $
 .Dt SSHD_CONFIG 5
 .Os
 .Sh NAME
@@ -210,6 +210,18 @@ would restrict keyboard interactive authentication to the
 .Dq bsdauth
 device.
 .Pp
+If the
+.Dq publickey
+method is listed more than one,
+.Xr sshd 8
+verifies that keys that have been successfully are not reused for subsequent
+authentications.
+For example, an
+.Cm AuthenticationMethods
+of
+.Dq publickey,publickey
+will require successful authentication using two different public keys.
+.Pp
 This option is only available for SSH protocol 2 and will yield a fatal
 error if enabled if protocol 1 is also enabled.
 Note that each authentication method listed should also be explicitly enabled
@@ -232,6 +244,9 @@ By default, no AuthorizedKeysCommand is run.
 Specifies the user under whose account the AuthorizedKeysCommand is run.
 It is recommended to use a dedicated user that has no other role on the host
 than running authorized keys commands.
+If no user is specified then
+.Cm AuthorizedKeysCommand
+is ignored.
 .It Cm AuthorizedKeysFile
 Specifies the file that contains the public keys that can be used
 for user authentication.