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Index: gss-serv.c
===================================================================
RCS file: /cvs/src/usr.bin/ssh/gss-serv.c,v
retrieving revision 1.22
diff -u -p -r1.22 gss-serv.c
--- gss-serv.c 8 May 2008 12:02:23 -0000 1.22
+++ gss-serv.c 11 Jan 2010 05:38:29 -0000
@@ -41,9 +41,12 @@
#include "channels.h"
#include "session.h"
#include "misc.h"
+#include "servconf.h"
#include "ssh-gss.h"
+extern ServerOptions options;
+
static ssh_gssapi_client gssapi_client =
{ GSS_C_EMPTY_BUFFER, GSS_C_EMPTY_BUFFER,
GSS_C_NO_CREDENTIAL, NULL, {NULL, NULL, NULL}};
@@ -77,25 +80,32 @@ ssh_gssapi_acquire_cred(Gssctxt *ctx)
char lname[MAXHOSTNAMELEN];
gss_OID_set oidset;
- gss_create_empty_oid_set(&status, &oidset);
- gss_add_oid_set_member(&status, ctx->oid, &oidset);
-
- if (gethostname(lname, MAXHOSTNAMELEN)) {
- gss_release_oid_set(&status, &oidset);
- return (-1);
- }
+ if (options.gss_strict_acceptor) {
+ gss_create_empty_oid_set(&status, &oidset);
+ gss_add_oid_set_member(&status, ctx->oid, &oidset);
+
+ if (gethostname(lname, MAXHOSTNAMELEN)) {
+ gss_release_oid_set(&status, &oidset);
+ return (-1);
+ }
+
+ if (GSS_ERROR(ssh_gssapi_import_name(ctx, lname))) {
+ gss_release_oid_set(&status, &oidset);
+ return (ctx->major);
+ }
+
+ if ((ctx->major = gss_acquire_cred(&ctx->minor,
+ ctx->name, 0, oidset, GSS_C_ACCEPT, &ctx->creds,
+ NULL, NULL)))
+ ssh_gssapi_error(ctx);
- if (GSS_ERROR(ssh_gssapi_import_name(ctx, lname))) {
gss_release_oid_set(&status, &oidset);
return (ctx->major);
+ } else {
+ ctx->name = GSS_C_NO_NAME;
+ ctx->creds = GSS_C_NO_CREDENTIAL;
}
-
- if ((ctx->major = gss_acquire_cred(&ctx->minor,
- ctx->name, 0, oidset, GSS_C_ACCEPT, &ctx->creds, NULL, NULL)))
- ssh_gssapi_error(ctx);
-
- gss_release_oid_set(&status, &oidset);
- return (ctx->major);
+ return GSS_S_COMPLETE;
}
/* Privileged */
Index: servconf.c
===================================================================
RCS file: /cvs/src/usr.bin/ssh/servconf.c,v
retrieving revision 1.201
diff -u -p -r1.201 servconf.c
--- servconf.c 10 Jan 2010 03:51:17 -0000 1.201
+++ servconf.c 11 Jan 2010 05:34:56 -0000
@@ -86,6 +86,7 @@ initialize_server_options(ServerOptions
options->kerberos_get_afs_token = -1;
options->gss_authentication=-1;
options->gss_cleanup_creds = -1;
+ options->gss_strict_acceptor = -1;
options->password_authentication = -1;
options->kbd_interactive_authentication = -1;
options->challenge_response_authentication = -1;
@@ -200,6 +201,8 @@ fill_default_server_options(ServerOption
options->gss_authentication = 0;
if (options->gss_cleanup_creds == -1)
options->gss_cleanup_creds = 1;
+ if (options->gss_strict_acceptor == -1)
+ options->gss_strict_acceptor = 0;
if (options->password_authentication == -1)
options->password_authentication = 1;
if (options->kbd_interactive_authentication == -1)
@@ -277,7 +280,8 @@ typedef enum {
sBanner, sUseDNS, sHostbasedAuthentication,
sHostbasedUsesNameFromPacketOnly, sClientAliveInterval,
sClientAliveCountMax, sAuthorizedKeysFile,
- sGssAuthentication, sGssCleanupCreds, sAcceptEnv, sPermitTunnel,
+ sGssAuthentication, sGssCleanupCreds, sGssStrictAcceptor,
+ sAcceptEnv, sPermitTunnel,
sMatch, sPermitOpen, sForceCommand, sChrootDirectory,
sUsePrivilegeSeparation, sAllowAgentForwarding,
sZeroKnowledgePasswordAuthentication, sHostCertificate,
@@ -327,9 +331,11 @@ static struct {
#ifdef GSSAPI
{ "gssapiauthentication", sGssAuthentication, SSHCFG_ALL },
{ "gssapicleanupcredentials", sGssCleanupCreds, SSHCFG_GLOBAL },
+ { "gssapistrictacceptorcheck", sGssStrictAcceptor, SSHCFG_GLOBAL },
#else
{ "gssapiauthentication", sUnsupported, SSHCFG_ALL },
{ "gssapicleanupcredentials", sUnsupported, SSHCFG_GLOBAL },
+ { "gssapistrictacceptorcheck", sUnsupported, SSHCFG_GLOBAL },
#endif
{ "passwordauthentication", sPasswordAuthentication, SSHCFG_ALL },
{ "kbdinteractiveauthentication", sKbdInteractiveAuthentication, SSHCFG_ALL },
@@ -850,6 +856,10 @@ process_server_config_line(ServerOptions
case sGssCleanupCreds:
intptr = &options->gss_cleanup_creds;
+ goto parse_flag;
+
+ case sGssStrictAcceptor:
+ intptr = &options->gss_strict_acceptor;
goto parse_flag;
case sPasswordAuthentication:
Index: servconf.h
===================================================================
RCS file: /cvs/src/usr.bin/ssh/servconf.h,v
retrieving revision 1.89
diff -u -p -r1.89 servconf.h
--- servconf.h 9 Jan 2010 23:04:13 -0000 1.89
+++ servconf.h 11 Jan 2010 05:32:28 -0000
@@ -92,6 +92,7 @@ typedef struct {
* authenticated with Kerberos. */
int gss_authentication; /* If true, permit GSSAPI authentication */
int gss_cleanup_creds; /* If true, destroy cred cache on logout */
+ int gss_strict_acceptor; /* If true, restrict the GSSAPI acceptor name */
int password_authentication; /* If true, permit password
* authentication. */
int kbd_interactive_authentication; /* If true, permit */
Index: sshd_config
===================================================================
RCS file: /cvs/src/usr.bin/ssh/sshd_config,v
retrieving revision 1.81
diff -u -p -r1.81 sshd_config
--- sshd_config 8 Oct 2009 14:03:41 -0000 1.81
+++ sshd_config 11 Jan 2010 05:32:28 -0000
@@ -69,6 +69,7 @@
# GSSAPI options
#GSSAPIAuthentication no
#GSSAPICleanupCredentials yes
+#GSSAPIStrictAcceptorCheck yes
# Set this to 'yes' to enable PAM authentication, account processing,
# and session processing. If this is enabled, PAM authentication will
Index: sshd_config.5
===================================================================
RCS file: /cvs/src/usr.bin/ssh/sshd_config.5,v
retrieving revision 1.116
diff -u -p -r1.116 sshd_config.5
--- sshd_config.5 9 Jan 2010 23:04:13 -0000 1.116
+++ sshd_config.5 11 Jan 2010 05:37:20 -0000
@@ -386,6 +386,21 @@ on logout.
The default is
.Dq yes .
Note that this option applies to protocol version 2 only.
+.It Cm GSSAPIStrictAcceptorCheck
+Determines whether to be strict about the identity of the GSSAPI acceptor
+a client authenticates against.
+If set to
+.Dq yes
+then the client must authenticate against the
+.Pa host
+service on the current hostname.
+If set to
+.Dq no
+then the client may authenticate against any service key stored in the
+machine's default store.
+This facility is provided to assist with operation on multi homed machines.
+The default is
+.Dq yes .
.It Cm HostbasedAuthentication
Specifies whether rhosts or /etc/hosts.equiv authentication together
with successful public key client host authentication is allowed
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