- fix gssapi with DNS loadbalanced clusters (#216857)

openssh-4.3p2-gssapi-canohost.patch

@@ -0,0 +1,27 @@
+Symptom: intermittent errors on GSSAPI authentication vs 
+machines on DNS loadbalancer, stupid client message "Generic Error",
+server-side debug complains about unknown principal.
+
+Comes from the fact that we resolve the generic DNS name once for
+the connection, then again for getting the GSSAPI/Kerberos service
+ticket. So the service ticket may be for a different host, if
+the DNS alias switches in between the two resolves.
+--- openssh-4.3p2/sshconnect2.c.gss-canohost	2006-11-28 21:58:03.000000000 +0100
++++ openssh-4.3p2/sshconnect2.c	2006-11-30 11:33:14.000000000 +0100
+@@ -485,6 +485,7 @@
+ 	static u_int mech = 0;
+ 	OM_uint32 min;
+ 	int ok = 0;
++	const char* remotehost = get_canonical_hostname(1);
+ 
+ 	/* Try one GSSAPI method at a time, rather than sending them all at
+ 	 * once. */
+@@ -497,7 +498,7 @@
+ 		/* My DER encoding requires length<128 */
+ 		if (gss_supported->elements[mech].length < 128 &&
+ 		    ssh_gssapi_check_mechanism(&gssctxt, 
+-		    &gss_supported->elements[mech], authctxt->host)) {
++		    &gss_supported->elements[mech], remotehost)) {
+ 			ok = 1; /* Mechanism works */
+ 		} else {
+ 			mech++;

openssh.spec

@@ -61,7 +61,7 @@
 Summary: The OpenSSH implementation of SSH protocol versions 1 and 2
 Name: openssh
 Version: 4.3p2
-Release: 13%{?dist}%{?rescue_rel}
+Release: 14%{?dist}%{?rescue_rel}
 URL: http://www.openssh.com/portable.html
 #Source0: ftp://ftp.openbsd.org/pub/OpenBSD/OpenSSH/portable/openssh-%{version}.tar.gz
 #Source1: ftp://ftp.openbsd.org/pub/OpenBSD/OpenSSH/portable/openssh-%{version}.tar.gz.sig
@@ -98,6 +98,7 @@ Patch45: openssh-4.3p2-cve-2006-4924.patch
 Patch46: openssh-3.9p1-cve-2006-5051.patch
 Patch47: openssh-4.3p2-cve-2006-5794.patch
 Patch48: openssh-4.3p2-pam-session.patch
+Patch49: openssh-4.3p2-gssapi-canohost.patch
 License: BSD
 Group: Applications/Internet
 BuildRoot: %{_tmppath}/%{name}-%{version}-buildroot
@@ -233,6 +234,7 @@ an X11 passphrase dialog for OpenSSH.
 %patch46 -p1 -b .sig-no-cleanup
 %patch47 -p1 -b .verify
 %patch48 -p1 -b .pam-sesssion
+%patch49 -p1 -b .canohost
 
 autoreconf
 
@@ -477,6 +479,9 @@ fi
 %endif
 
 %changelog
+* Thu Nov 30 2006 Tomas Mraz <tmraz@redhat.com> - 4.3p2-14
+- fix gssapi with DNS loadbalanced clusters (#216857)
+
 * Tue Nov 28 2006 Tomas Mraz <tmraz@redhat.com> - 4.3p2-13
 - improved pam_session patch so it doesn't regress, the patch is necessary
   for the pam_session_close to be called correctly as uid 0