- markus@cvs.openbsd.org 2001/11/07 22:53:21

[openssh.git] / auth-options.c

diff --git a/auth-options.c b/auth-options.c
index bfb1af86b32bb957a1038c78fc8a3c67c7f8d607..9f90437ca37447fae2d3d326812e2c94e6e0efd7 100644 (file)
--- a/auth-options.c
+++ b/auth-options.c
@@ -10,15 +10,17 @@
  */
 
 #include "includes.h"
-RCSID("$OpenBSD: auth-options.c,v 1.14 2001/03/13 17:34:42 markus Exp $");
+RCSID("$OpenBSD: auth-options.c,v 1.20 2001/08/30 20:36:34 stevesk Exp $");
 
 #include "packet.h"
 #include "xmalloc.h"
 #include "match.h"
 #include "log.h"
 #include "canohost.h"
+#include "channels.h"
 #include "auth-options.h"
 #include "servconf.h"
+#include "misc.h"
 
 /* Flags set authorized_keys flags */
 int no_port_forwarding_flag = 0;
@@ -51,6 +53,7 @@ auth_clear_options(void)
                xfree(forced_command);
                forced_command = NULL;
        }
+       channel_clear_permitted_opens();
 }
 
 /*
@@ -61,6 +64,7 @@ int
 auth_parse_options(struct passwd *pw, char *opts, char *file, u_long linenum)
 {
        const char *cp;
+       int i;
 
        /* reset options */
        auth_clear_options();
@@ -99,7 +103,6 @@ auth_parse_options(struct passwd *pw, char *opts, char *file, u_long linenum)
                }
                cp = "command=\"";
                if (strncasecmp(opts, cp, strlen(cp)) == 0) {
-                       int i;
                        opts += strlen(cp);
                        forced_command = xmalloc(strlen(opts) + 1);
                        i = 0;
@@ -129,9 +132,9 @@ auth_parse_options(struct passwd *pw, char *opts, char *file, u_long linenum)
                }
                cp = "environment=\"";
                if (strncasecmp(opts, cp, strlen(cp)) == 0) {
-                       int i;
                        char *s;
                        struct envstring *new_envstring;
+
                        opts += strlen(cp);
                        s = xmalloc(strlen(opts) + 1);
                        i = 0;
@@ -165,12 +168,11 @@ auth_parse_options(struct passwd *pw, char *opts, char *file, u_long linenum)
                }
                cp = "from=\"";
                if (strncasecmp(opts, cp, strlen(cp)) == 0) {
-                       int mname, mip;
                        const char *remote_ip = get_remote_ipaddr();
                        const char *remote_host = get_canonical_hostname(
                            options.reverse_mapping_check);
                        char *patterns = xmalloc(strlen(opts) + 1);
-                       int i;
+
                        opts += strlen(cp);
                        i = 0;
                        while (*opts) {
@@ -193,18 +195,9 @@ auth_parse_options(struct passwd *pw, char *opts, char *file, u_long linenum)
                        }
                        patterns[i] = 0;
                        opts++;
-                       /*
-                        * Deny access if we get a negative
-                        * match for the hostname or the ip
-                        * or if we get not match at all
-                        */
-                       mname = match_hostname(remote_host, patterns,
-                           strlen(patterns));
-                       mip = match_hostname(remote_ip, patterns,
-                           strlen(patterns));
-                       xfree(patterns);
-                       if (mname == -1 || mip == -1 ||
-                           (mname != 1 && mip != 1)) {
+                       if (match_host_and_ip(remote_host, remote_ip,
+                           patterns) != 1) {
+                               xfree(patterns);
                                log("Authentication tried for %.100s with "
                                    "correct key but not from a permitted "
                                    "host (host=%.200s, ip=%.200s).",
@@ -215,9 +208,60 @@ auth_parse_options(struct passwd *pw, char *opts, char *file, u_long linenum)
                                /* deny access */
                                return 0;
                        }
+                       xfree(patterns);
                        /* Host name matches. */
                        goto next_option;
                }
+               cp = "permitopen=\"";
+               if (strncasecmp(opts, cp, strlen(cp)) == 0) {
+                       char host[256], sport[6];
+                       u_short port;
+                       char *patterns = xmalloc(strlen(opts) + 1);
+
+                       opts += strlen(cp);
+                       i = 0;
+                       while (*opts) {
+                               if (*opts == '"')
+                                       break;
+                               if (*opts == '\\' && opts[1] == '"') {
+                                       opts += 2;
+                                       patterns[i++] = '"';
+                                       continue;
+                               }
+                               patterns[i++] = *opts++;
+                       }
+                       if (!*opts) {
+                               debug("%.100s, line %lu: missing end quote",
+                                   file, linenum);
+                               packet_send_debug("%.100s, line %lu: missing end quote",
+                                   file, linenum);
+                               xfree(patterns);
+                               goto bad_option;
+                       }
+                       patterns[i] = 0;
+                       opts++;
+                       if (sscanf(patterns, "%255[^:]:%5[0-9]", host, sport) != 2 &&
+                           sscanf(patterns, "%255[^/]/%5[0-9]", host, sport) != 2) {
+                               debug("%.100s, line %lu: Bad permitopen specification "
+                                   "<%.100s>", file, linenum, patterns);
+                               packet_send_debug("%.100s, line %lu: "
+                                   "Bad permitopen specification", file, linenum);
+                               xfree(patterns);
+                               goto bad_option;
+                       }
+                       if ((port = a2port(sport)) == 0) {
+                               debug("%.100s, line %lu: Bad permitopen port <%.100s>",
+                                   file, linenum, sport);
+                               packet_send_debug("%.100s, line %lu: "
+                                   "Bad permitopen port", file, linenum);
+                               xfree(patterns);
+                               goto bad_option;
+                       }
+                       if (options.allow_tcp_forwarding)
+                               channel_add_permitted_opens(host, port);
+                       xfree(patterns);
+                       goto next_option;
+               }
 next_option:
                /*
                 * Skip the comma, and move to the next option