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openssh-portable
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Allow "ssh -Q protocol-version" to list supported SSH
 protocol versions. Useful for detecting builds without SSH v.1 support; idea
 and ok markus@
This commit is contained in:
djm@openbsd.org 2015-03-03 06:48:58 +00:00 committed by Damien Miller
parent 39e2f12295
commit 68d2dfc464
2 changed files with 15 additions and 6 deletions
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12
ssh.1
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.1,v 1.355 2015/01/30 11:43:14 djm Exp $
.Dd $Mdocdate: January 30 2015 $
.\" $OpenBSD: ssh.1,v 1.356 2015/03/03 06:48:58 djm Exp $
.Dd $Mdocdate: March 3 2015 $
.Dt SSH 1
.Os
.Sh NAME
@ -58,7 +58,7 @@
.Op Fl O Ar ctl_cmd
.Op Fl o Ar option
.Op Fl p Ar port
.Op Fl Q Cm cipher | cipher-auth | mac | kex | key
.Op Fl Q Cm cipher | cipher-auth | mac | kex | key | protocol-version
.Op Fl R Oo Ar bind_address : Oc Ns Ar port : Ns Ar host : Ns Ar hostport
.Op Fl S Ar ctl_path
.Op Fl W Ar host : Ns Ar port
@ -497,7 +497,7 @@ For full details of the options listed below, and their possible values, see
Port to connect to on the remote host.
This can be specified on a
per-host basis in the configuration file.
.It Fl Q Cm cipher | cipher-auth | mac | kex | key
.It Fl Q Cm cipher | cipher-auth | mac | kex | key | protocol-version
Queries
.Nm
for the algorithms supported for the specified version 2.
@ -511,7 +511,9 @@ The available features are:
.Ar kex
(key exchange algorithms),
.Ar key
(key types).
(key types) and
.Ar protocol-version
(supported SSH protocol versions).
.It Fl q
Quiet mode.
Causes most warning and diagnostic messages to be suppressed.

9
ssh.c
View File

@ -1,4 +1,4 @@
/* $OpenBSD: ssh.c,v 1.415 2015/02/20 22:17:21 djm Exp $ */
/* $OpenBSD: ssh.c,v 1.416 2015/03/03 06:48:58 djm Exp $ */
/*
* Author: Tatu Ylonen <ylo@cs.hut.fi>
* Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
@ -678,6 +678,13 @@ main(int ac, char **av)
cp = key_alg_list(1, 0);
else if (strcmp(optarg, "key-plain") == 0)
cp = key_alg_list(0, 1);
else if (strcmp(optarg, "protocol-version") == 0) {
#ifdef WITH_SSH1
cp = xstrdup("1\n2");
#else
cp = xstrdup("2");
#endif
}
if (cp == NULL)
fatal("Unsupported query \"%s\"", optarg);
printf("%s\n", cp);