ssh-keysign - ssh helper program for host-based authentication
ssh-keysign is used by ssh(1) to access the local host keys and generate the digital signature required during host-based authentication with SSH protocol version 2. This signature is of data that includes, among other items, the name of the client host and the name of the client user.
ssh-keysign is disabled by default and can be enabled only in the global client configuration file /etc/ssh/ssh_config by setting HostbasedAuthentication to yes.
ssh-keysign is not intended to be invoked by the user, but from ssh. See ssh(1) and sshd(1M) for more information about host-based authentication.
ssh-keysign will not sign host-based authentication data under the following conditions:
In spite of ssh-keysign's restrictions on the contents of the host-based authentication data, there remains the ability of users to use it as an avenue for obtaining the client's private host keys. For this reason host-based authentication is turned off by default.
See attributes(5) for descriptions of the following attributes:
ssh(1), sshd(1M), ssh_config(4), attributes(5)
Markus Friedl, firstname.lastname@example.org
ssh-keysign first appeared in Ox 3.2.
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Created 1996-2022 by Maxim Chirkov
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