upstream: When running sshd -T, assume any attibute not provided by

-C does not match, which allows it to work when sshd_config contains a Match
directive with or without -C.  bz#2858, ok djm@

OpenBSD-Commit-ID: 1a701f0a33e3bc96753cfda2fe0b0378520b82eb

3 files changed, 15 insertions, 10 deletions

diff --git a/servconf.c b/servconf.c
index ffac5d2c7..340045b28 100644
--- a/servconf.c
+++ b/servconf.c
@@ -1,5 +1,5 @@
 
-/* $OpenBSD: servconf.c,v 1.350 2019/03/25 22:33:44 djm Exp $ */
+/* $OpenBSD: servconf.c,v 1.351 2019/04/18 18:56:16 dtucker Exp $ */
 /*
  * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
  *                    All rights reserved
@@ -1042,7 +1042,7 @@ match_cfg_line(char **condition, int line, struct connection_info *ci)
                         return -1;
                 }
                 if (strcasecmp(attrib, "user") == 0) {
-                        if (ci == NULL) {
+                        if (ci == NULL || (ci->test && ci->user == NULL)) {
                                 result = 0;
                                 continue;
                         }
@@ -1054,7 +1054,7 @@ match_cfg_line(char **condition, int line, struct connection_info *ci)
                                 debug("user %.100s matched 'User %.100s' at "
                                     "line %d", ci->user, arg, line);
                 } else if (strcasecmp(attrib, "group") == 0) {
-                        if (ci == NULL) {
+                        if (ci == NULL || (ci->test && ci->user == NULL)) {
                                 result = 0;
                                 continue;
                         }
@@ -1067,7 +1067,7 @@ match_cfg_line(char **condition, int line, struct connection_info *ci)
                                 result = 0;
                         }
                 } else if (strcasecmp(attrib, "host") == 0) {
-                        if (ci == NULL) {
+                        if (ci == NULL || (ci->test && ci->host == NULL)) {
                                 result = 0;
                                 continue;
                         }
@@ -1079,7 +1079,7 @@ match_cfg_line(char **condition, int line, struct connection_info *ci)
                                 debug("connection from %.100s matched 'Host "
                                     "%.100s' at line %d", ci->host, arg, line);
                 } else if (strcasecmp(attrib, "address") == 0) {
-                        if (ci == NULL) {
+                        if (ci == NULL || (ci->test && ci->address == NULL)) {
                                 result = 0;
                                 continue;
                         }
@@ -1098,7 +1098,7 @@ match_cfg_line(char **condition, int line, struct connection_info *ci)
                                 return -1;
                         }
                 } else if (strcasecmp(attrib, "localaddress") == 0){
-                        if (ci == NULL) {
+                        if (ci == NULL || (ci->test && ci->laddress == NULL)) {
                                 result = 0;
                                 continue;
                         }
@@ -1124,7 +1124,7 @@ match_cfg_line(char **condition, int line, struct connection_info *ci)
                                     arg);
                                 return -1;
                         }
-                        if (ci == NULL) {
+                        if (ci == NULL || (ci->test && ci->lport == -1)) {
                                 result = 0;
                                 continue;
                         }
@@ -1138,10 +1138,12 @@ match_cfg_line(char **condition, int line, struct connection_info *ci)
                         else
                                 result = 0;
                 } else if (strcasecmp(attrib, "rdomain") == 0) {
-                        if (ci == NULL || ci->rdomain == NULL) {
+                        if (ci == NULL || (ci->test && ci->rdomain == NULL)) {
                                 result = 0;
                                 continue;
                         }
+                        if (ci->rdomain == NULL)
+                                match_test_missing_fatal("RDomain", "rdomain");
                         if (match_pattern_list(ci->rdomain, arg, 0) != 1)
                                 result = 0;
                         else
diff --git a/servconf.h b/servconf.h
index 54e0a8d8d..5483da051 100644
--- a/servconf.h
+++ b/servconf.h
@@ -1,4 +1,4 @@
-/* $OpenBSD: servconf.h,v 1.139 2019/01/19 21:37:48 djm Exp $ */
+/* $OpenBSD: servconf.h,v 1.140 2019/04/18 18:56:16 dtucker Exp $ */
 
 /*
  * Author: Tatu Ylonen <ylo@cs.hut.fi>
@@ -221,6 +221,8 @@ struct connection_info {
         const char *laddress;   /* local address */
         int lport;              /* local port */
         const char *rdomain;    /* routing domain if available */
+        int test;               /* test mode, allow some attributes to be
+                                 * unspecified */
 };
 
 
diff --git a/sshd.c b/sshd.c
index cbd3bce91..1fcde502b 100644
--- a/sshd.c
+++ b/sshd.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: sshd.c,v 1.533 2019/03/01 02:32:39 djm Exp $ */
+/* $OpenBSD: sshd.c,v 1.534 2019/04/18 18:56:16 dtucker Exp $ */
 /*
  * Author: Tatu Ylonen <ylo@cs.hut.fi>
  * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
@@ -1843,6 +1843,7 @@ main(int ac, char **av)
                  */
                 if (connection_info == NULL)
                         connection_info = get_connection_info(ssh, 0, 0);
+                connection_info->test = 1;
                 parse_server_match_config(&options, connection_info);
                 dump_config(&options);
         }