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upstream: Add %-TOKEN, environment variable and tilde expansion to 

UserKnownHostsFile, allowing the file to be automagically split up in the
configuration (eg bz#1654).  ok djm@, man page parts jmc@

OpenBSD-Commit-ID: 7e1b406caf147638bb51558836a72d6cc0bd1b18
This commit is contained in:
dtucker@openbsd.org 2020-07-17 03:23:10 +00:00 committed by Damien Miller
parent dbaaa01dae
commit c4f239944a
2 changed files with 30 additions and 6 deletions
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18
ssh.c
View File

@ -1,4 +1,4 @@
/* $OpenBSD: ssh.c,v 1.531 2020/07/05 23:59:45 djm Exp $ */
/* $OpenBSD: ssh.c,v 1.532 2020/07/17 03:23:10 dtucker Exp $ */
/*
* Author: Tatu Ylonen <ylo@cs.hut.fi>
* Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
@ -654,6 +654,7 @@ main(int ac, char **av)
struct Forward fwd;
struct addrinfo *addrs = NULL;
size_t n, len;
u_int j;
/* Ensure that fds 0, 1 and 2 are open or directed to /dev/null */
sanitise_stdfd();
@ -1427,6 +1428,21 @@ main(int ac, char **av)
options.forward_agent_sock_path = cp;
}
for (j = 0; j < options.num_user_hostfiles; j++) {
if (options.user_hostfiles[j] != NULL) {
cp = tilde_expand_filename(options.user_hostfiles[j],
getuid());
p = default_client_percent_dollar_expand(cp,
pw->pw_dir, host, options.user, pw->pw_name);
if (strcmp(options.user_hostfiles[j], p) != 0)
debug3("expanded UserKnownHostsFile '%s' -> "
"'%s'", options.user_hostfiles[j], p);
free(options.user_hostfiles[j]);
free(cp);
options.user_hostfiles[j] = p;
}
}
for (i = 0; i < options.num_local_forwards; i++) {
if (options.local_forwards[i].listen_path != NULL) {
cp = options.local_forwards[i].listen_path;

18
ssh_config.5
View File

@ -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: ssh_config.5,v 1.328 2020/05/29 05:48:39 jmc Exp $
.Dd $Mdocdate: May 29 2020 $
.\" $OpenBSD: ssh_config.5,v 1.329 2020/07/17 03:23:10 dtucker Exp $
.Dd $Mdocdate: July 17 2020 $
.Dt SSH_CONFIG 5
.Os
.Sh NAME
@ -1738,6 +1738,12 @@ having to remember to give the user name on the command line.
.It Cm UserKnownHostsFile
Specifies one or more files to use for the user
host key database, separated by whitespace.
Each filename may use tilde notation to refer to the user's home directory,
the tokens described in the
.Sx TOKENS
section and environment variables as described in the
.Sx ENVIRONMENT VARIABLES
section.
The default is
.Pa ~/.ssh/known_hosts ,
.Pa ~/.ssh/known_hosts2 .
@ -1874,8 +1880,9 @@ The local username.
.Cm LocalForward ,
.Cm Match exec ,
.Cm RemoteCommand ,
.Cm RemoteForward ,
and
.Cm RemoteForward
.Com UserKnownHostsFile
accept the tokens %%, %C, %d, %h, %i, %L, %l, %n, %p, %r, and %u.
.Pp
.Cm Hostname
@ -1899,9 +1906,10 @@ returned and the setting for that keyword will be ignored.
The keywords
.Cm CertificateFile ,
.Cm ControlPath ,
.Cm IdentityAgent
and
.Cm IdentityAgent ,
.Cm IdentityFile
and
.Cm UserKnownHostsFile
support environment variables.
The keywords
.Cm LocalForward