+/* $OpenBSD: auth-options.c,v 1.44 2009/01/22 10:09:16 djm Exp $ */
/*
* Author: Tatu Ylonen <ylo@cs.hut.fi>
* Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
*/
#include "includes.h"
-RCSID("$OpenBSD: auth-options.c,v 1.22 2002/03/18 17:50:31 provos Exp $");
-#include "packet.h"
+#include <sys/types.h>
+
+#include <netdb.h>
+#include <pwd.h>
+#include <string.h>
+#include <stdio.h>
+#include <stdarg.h>
+
+#include "openbsd-compat/sys-queue.h"
#include "xmalloc.h"
#include "match.h"
#include "log.h"
#include "canohost.h"
+#include "buffer.h"
#include "channels.h"
#include "auth-options.h"
#include "servconf.h"
-#include "bufaux.h"
#include "misc.h"
+#include "key.h"
+#include "hostfile.h"
+#include "auth.h"
+#ifdef GSSAPI
+#include "ssh-gss.h"
+#endif
#include "monitor_wrap.h"
-/* Debugging messages */
-Buffer auth_debug;
-int auth_debug_init;
-
/* Flags set authorized_keys flags */
int no_port_forwarding_flag = 0;
int no_agent_forwarding_flag = 0;
int no_x11_forwarding_flag = 0;
int no_pty_flag = 0;
+int no_user_rc = 0;
/* "command=" option. */
char *forced_command = NULL;
/* "environment=" options. */
struct envstring *custom_environment = NULL;
-extern ServerOptions options;
+/* "tunnel=" option. */
+int forced_tun_device = -1;
-void
-auth_send_debug(Buffer *m)
-{
- char *msg;
-
- while (buffer_len(m)) {
- msg = buffer_get_string(m, NULL);
- packet_send_debug("%s", msg);
- xfree(msg);
- }
-}
+extern ServerOptions options;
void
auth_clear_options(void)
{
- if (auth_debug_init)
- buffer_clear(&auth_debug);
- else {
- buffer_init(&auth_debug);
- auth_debug_init = 1;
- }
-
no_agent_forwarding_flag = 0;
no_port_forwarding_flag = 0;
no_pty_flag = 0;
no_x11_forwarding_flag = 0;
+ no_user_rc = 0;
while (custom_environment) {
struct envstring *ce = custom_environment;
custom_environment = ce->next;
xfree(forced_command);
forced_command = NULL;
}
+ forced_tun_device = -1;
channel_clear_permitted_opens();
+ auth_debug_reset();
}
/*
int
auth_parse_options(struct passwd *pw, char *opts, char *file, u_long linenum)
{
- char tmp[1024];
const char *cp;
int i;
while (*opts && *opts != ' ' && *opts != '\t') {
cp = "no-port-forwarding";
if (strncasecmp(opts, cp, strlen(cp)) == 0) {
- snprintf(tmp, sizeof(tmp), "Port forwarding disabled.");
- buffer_put_cstring(&auth_debug, tmp);
+ auth_debug_add("Port forwarding disabled.");
no_port_forwarding_flag = 1;
opts += strlen(cp);
goto next_option;
}
cp = "no-agent-forwarding";
if (strncasecmp(opts, cp, strlen(cp)) == 0) {
- snprintf(tmp, sizeof(tmp), "Agent forwarding disabled.");
- buffer_put_cstring(&auth_debug, tmp);
+ auth_debug_add("Agent forwarding disabled.");
no_agent_forwarding_flag = 1;
opts += strlen(cp);
goto next_option;
}
cp = "no-X11-forwarding";
if (strncasecmp(opts, cp, strlen(cp)) == 0) {
- snprintf(tmp, sizeof(tmp), "X11 forwarding disabled.");
- buffer_put_cstring(&auth_debug, tmp);
+ auth_debug_add("X11 forwarding disabled.");
no_x11_forwarding_flag = 1;
opts += strlen(cp);
goto next_option;
}
cp = "no-pty";
if (strncasecmp(opts, cp, strlen(cp)) == 0) {
- snprintf(tmp, sizeof(tmp), "Pty allocation disabled.");
- buffer_put_cstring(&auth_debug, tmp);
+ auth_debug_add("Pty allocation disabled.");
no_pty_flag = 1;
opts += strlen(cp);
goto next_option;
}
+ cp = "no-user-rc";
+ if (strncasecmp(opts, cp, strlen(cp)) == 0) {
+ auth_debug_add("User rc file execution disabled.");
+ no_user_rc = 1;
+ opts += strlen(cp);
+ goto next_option;
+ }
cp = "command=\"";
if (strncasecmp(opts, cp, strlen(cp)) == 0) {
opts += strlen(cp);
if (!*opts) {
debug("%.100s, line %lu: missing end quote",
file, linenum);
- snprintf(tmp, sizeof(tmp), "%.100s, line %lu: missing end quote",
+ auth_debug_add("%.100s, line %lu: missing end quote",
file, linenum);
- buffer_put_cstring(&auth_debug, tmp);
xfree(forced_command);
forced_command = NULL;
goto bad_option;
}
- forced_command[i] = 0;
- snprintf(tmp, sizeof(tmp), "Forced command: %.900s", forced_command);
- buffer_put_cstring(&auth_debug, tmp);
+ forced_command[i] = '\0';
+ auth_debug_add("Forced command: %.900s", forced_command);
opts++;
goto next_option;
}
cp = "environment=\"";
- if (strncasecmp(opts, cp, strlen(cp)) == 0) {
+ if (options.permit_user_env &&
+ strncasecmp(opts, cp, strlen(cp)) == 0) {
char *s;
struct envstring *new_envstring;
if (!*opts) {
debug("%.100s, line %lu: missing end quote",
file, linenum);
- snprintf(tmp, sizeof(tmp), "%.100s, line %lu: missing end quote",
+ auth_debug_add("%.100s, line %lu: missing end quote",
file, linenum);
- buffer_put_cstring(&auth_debug, tmp);
xfree(s);
goto bad_option;
}
- s[i] = 0;
- snprintf(tmp, sizeof(tmp), "Adding to environment: %.900s", s);
- buffer_put_cstring(&auth_debug, tmp);
+ s[i] = '\0';
+ auth_debug_add("Adding to environment: %.900s", s);
debug("Adding to environment: %.900s", s);
opts++;
new_envstring = xmalloc(sizeof(struct envstring));
if (strncasecmp(opts, cp, strlen(cp)) == 0) {
const char *remote_ip = get_remote_ipaddr();
const char *remote_host = get_canonical_hostname(
- options.verify_reverse_mapping);
+ options.use_dns);
char *patterns = xmalloc(strlen(opts) + 1);
opts += strlen(cp);
if (!*opts) {
debug("%.100s, line %lu: missing end quote",
file, linenum);
- snprintf(tmp, sizeof(tmp), "%.100s, line %lu: missing end quote",
+ auth_debug_add("%.100s, line %lu: missing end quote",
file, linenum);
- buffer_put_cstring(&auth_debug, tmp);
xfree(patterns);
goto bad_option;
}
- patterns[i] = 0;
+ patterns[i] = '\0';
opts++;
- if (match_host_and_ip(remote_host, remote_ip,
- patterns) != 1) {
+ switch (match_host_and_ip(remote_host, remote_ip,
+ patterns)) {
+ case 1:
+ xfree(patterns);
+ /* Host name matches. */
+ goto next_option;
+ case -1:
+ debug("%.100s, line %lu: invalid criteria",
+ file, linenum);
+ auth_debug_add("%.100s, line %lu: "
+ "invalid criteria", file, linenum);
+ /* FALLTHROUGH */
+ case 0:
xfree(patterns);
- log("Authentication tried for %.100s with "
+ logit("Authentication tried for %.100s with "
"correct key but not from a permitted "
"host (host=%.200s, ip=%.200s).",
pw->pw_name, remote_host, remote_ip);
- snprintf(tmp, sizeof(tmp),
- "Your host '%.200s' is not "
+ auth_debug_add("Your host '%.200s' is not "
"permitted to use this key for login.",
remote_host);
- buffer_put_cstring(&auth_debug, tmp);
- /* deny access */
- return 0;
+ break;
}
- xfree(patterns);
- /* Host name matches. */
- goto next_option;
+ /* deny access */
+ return 0;
}
cp = "permitopen=\"";
if (strncasecmp(opts, cp, strlen(cp)) == 0) {
- char host[256], sport[6];
- u_short port;
+ char *host, *p;
+ int port;
char *patterns = xmalloc(strlen(opts) + 1);
opts += strlen(cp);
if (!*opts) {
debug("%.100s, line %lu: missing end quote",
file, linenum);
- snprintf(tmp, sizeof(tmp), "%.100s, line %lu: missing end quote",
- file, linenum);
- buffer_put_cstring(&auth_debug, tmp);
+ auth_debug_add("%.100s, line %lu: missing "
+ "end quote", file, linenum);
xfree(patterns);
goto bad_option;
}
- patterns[i] = 0;
+ 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);
- snprintf(tmp, sizeof(tmp), "%.100s, line %lu: "
- "Bad permitopen specification", file, linenum);
- buffer_put_cstring(&auth_debug, tmp);
+ p = patterns;
+ host = hpdelim(&p);
+ if (host == NULL || strlen(host) >= NI_MAXHOST) {
+ debug("%.100s, line %lu: Bad permitopen "
+ "specification <%.100s>", file, linenum,
+ patterns);
+ auth_debug_add("%.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);
- snprintf(tmp, sizeof(tmp), "%.100s, line %lu: "
+ host = cleanhostname(host);
+ if (p == NULL || (port = a2port(p)) <= 0) {
+ debug("%.100s, line %lu: Bad permitopen port "
+ "<%.100s>", file, linenum, p ? p : "");
+ auth_debug_add("%.100s, line %lu: "
"Bad permitopen port", file, linenum);
- buffer_put_cstring(&auth_debug, tmp);
xfree(patterns);
goto bad_option;
}
xfree(patterns);
goto next_option;
}
+ cp = "tunnel=\"";
+ if (strncasecmp(opts, cp, strlen(cp)) == 0) {
+ char *tun = NULL;
+ opts += strlen(cp);
+ tun = xmalloc(strlen(opts) + 1);
+ i = 0;
+ while (*opts) {
+ if (*opts == '"')
+ break;
+ tun[i++] = *opts++;
+ }
+ if (!*opts) {
+ debug("%.100s, line %lu: missing end quote",
+ file, linenum);
+ auth_debug_add("%.100s, line %lu: missing end quote",
+ file, linenum);
+ xfree(tun);
+ forced_tun_device = -1;
+ goto bad_option;
+ }
+ tun[i] = '\0';
+ forced_tun_device = a2tun(tun, NULL);
+ xfree(tun);
+ if (forced_tun_device == SSH_TUNID_ERR) {
+ debug("%.100s, line %lu: invalid tun device",
+ file, linenum);
+ auth_debug_add("%.100s, line %lu: invalid tun device",
+ file, linenum);
+ forced_tun_device = -1;
+ goto bad_option;
+ }
+ auth_debug_add("Forced tun device: %d", forced_tun_device);
+ opts++;
+ goto next_option;
+ }
next_option:
/*
* Skip the comma, and move to the next option
}
if (!use_privsep)
- auth_send_debug(&auth_debug);
+ auth_debug_send();
/* grant access */
return 1;
bad_option:
- log("Bad options in %.100s file, line %lu: %.50s",
+ logit("Bad options in %.100s file, line %lu: %.50s",
file, linenum, opts);
- snprintf(tmp, sizeof(tmp),
- "Bad options in %.100s file, line %lu: %.50s",
+ auth_debug_add("Bad options in %.100s file, line %lu: %.50s",
file, linenum, opts);
- buffer_put_cstring(&auth_debug, tmp);
if (!use_privsep)
- auth_send_debug(&auth_debug);
+ auth_debug_send();
/* deny access */
return 0;
andersk / openssh.git / blobdiff