+/* $OpenBSD: session.c,v 1.220 2006/10/09 23:36:11 djm Exp $ */
/*
* Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
* All rights reserved
*/
#include "includes.h"
-RCSID("$OpenBSD: session.c,v 1.186 2005/07/25 11:59:40 markus Exp $");
+#include <sys/types.h>
+#include <sys/param.h>
+#ifdef HAVE_SYS_STAT_H
+# include <sys/stat.h>
+#endif
+#include <sys/socket.h>
+#include <sys/un.h>
+#include <sys/wait.h>
+
+#include <arpa/inet.h>
+
+#include <errno.h>
+#include <grp.h>
+#ifdef HAVE_PATHS_H
+#include <paths.h>
+#endif
+#include <pwd.h>
+#include <signal.h>
+#include <stdarg.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+#include "xmalloc.h"
#include "ssh.h"
#include "ssh1.h"
#include "ssh2.h"
-#include "xmalloc.h"
#include "sshpty.h"
#include "packet.h"
#include "buffer.h"
#include "uidswap.h"
#include "compat.h"
#include "channels.h"
-#include "bufaux.h"
+#include "key.h"
+#include "cipher.h"
+#ifdef GSSAPI
+#include "ssh-gss.h"
+#endif
+#include "hostfile.h"
#include "auth.h"
#include "auth-options.h"
#include "pathnames.h"
#include <kafs.h>
#endif
-#ifdef GSSAPI
-#include "ssh-gss.h"
-#endif
-
/* func */
Session *session_new(void);
sunaddr.sun_family = AF_UNIX;
strlcpy(sunaddr.sun_path, auth_sock_name, sizeof(sunaddr.sun_path));
- if (bind(sock, (struct sockaddr *) & sunaddr, sizeof(sunaddr)) < 0)
+ if (bind(sock, (struct sockaddr *)&sunaddr, sizeof(sunaddr)) < 0)
packet_disconnect("bind: %.100s", strerror(errno));
/* Restore the privileged uid. */
packet_disconnect("listen: %.100s", strerror(errno));
/* Allocate a channel for the authentication agent socket. */
+ /* this shouldn't matter if its hpn or not - cjr */
nc = channel_new("auth socket",
SSH_CHANNEL_AUTH_SOCKET, sock, sock, -1,
CHAN_X11_WINDOW_DEFAULT, CHAN_X11_PACKET_DEFAULT,
{
setproctitle("%s", authctxt->pw->pw_name);
- /*
- * Cancel the alarm we set to limit the time taken for
- * authentication.
- */
- alarm(0);
- if (startup_pipe != -1) {
- close(startup_pipe);
- startup_pipe = -1;
- }
/* setup the channel layer */
if (!no_port_forwarding_flag && options.allow_tcp_forwarding)
channel_permit_all_opens();
break;
}
debug("Received TCP/IP port forwarding request.");
- channel_input_port_forward_request(s->pw->pw_uid == 0, options.gateway_ports);
+ if (channel_input_port_forward_request(s->pw->pw_uid == 0,
+ options.gateway_ports, options.hpn_disabled,
+ options.hpn_buffer_size) < 0) {
+ debug("Port forwarding failed.");
+ break;
+ }
success = 1;
break;
fromlen = sizeof(from);
if (packet_connection_is_on_socket()) {
if (getpeername(packet_get_connection_in(),
- (struct sockaddr *) & from, &fromlen) < 0) {
+ (struct sockaddr *)&from, &fromlen) < 0) {
debug("getpeername: %.100s", strerror(errno));
cleanup_exit(255);
}
void
do_exec(Session *s, const char *command)
{
- if (forced_command) {
+ if (options.adm_forced_command) {
+ original_command = command;
+ command = options.adm_forced_command;
+ debug("Forced command (config) '%.900s'", command);
+ } else if (forced_command) {
original_command = command;
command = forced_command;
- debug("Forced command '%.900s'", command);
+ debug("Forced command (key option) '%.900s'", command);
}
#if defined(SESSION_HOOKS)
}
#endif
-#ifdef GSSAPI
- if (options.gss_authentication) {
- temporarily_use_uid(s->pw);
- ssh_gssapi_storecreds();
- restore_uid();
- }
-#endif
-
#ifdef SSH_AUDIT_EVENTS
if (command != NULL)
PRIVSEP(audit_run_command(command));
if (envsize >= 1000)
fatal("child_set_env: too many env vars");
envsize += 50;
- env = (*envp) = xrealloc(env, envsize * sizeof(char *));
+ env = (*envp) = xrealloc(env, envsize, sizeof(char *));
*envsizep = envsize;
}
/* Need to set the NULL pointer at end of array beyond the new slot. */
{
char buf[256];
u_int i, envsize;
- char **env, *laddr, *path = NULL;
+ char **env, *laddr;
struct passwd *pw = s->pw;
+#ifndef HAVE_LOGIN_CAP
+ char *path = NULL;
+#endif
/* Initialize the environment. */
envsize = 100;
- env = xmalloc(envsize * sizeof(char *));
+ env = xcalloc(envsize, sizeof(char *));
env[0] = NULL;
#ifdef HAVE_CYGWIN
#endif
if (getuid() != pw->pw_uid || geteuid() != pw->pw_uid)
fatal("Failed to set uids to %u.", (u_int) pw->pw_uid);
+
+#ifdef WITH_SELINUX
+ ssh_selinux_setup_exec_context(pw->pw_name);
+#endif
}
static void
endpwent();
/*
- * Close any extra open file descriptors so that we don\'t have them
+ * Close any extra open file descriptors so that we don't have them
* hanging around in clients. Note that we want to do this after
* initgroups, because at least on Solaris 2.3 it leaves file
* descriptors open.
if (!check_quietlogin(s, command))
do_motd();
#else /* HAVE_OSF_SIA */
- do_nologin(pw);
+ /* When PAM is enabled we rely on it to do the nologin check */
+ if (!options.use_pam)
+ do_nologin(pw);
do_setusercontext(pw);
/*
* PAM session modules in do_setusercontext may have
}
#endif
- /* Change current directory to the user\'s home directory. */
+ /* Change current directory to the user's home directory. */
if (chdir(pw->pw_dir) < 0) {
fprintf(stderr, "Could not chdir to home directory %s: %s\n",
pw->pw_dir, strerror(errno));
do_rc_files(s, shell);
/* restore SIGPIPE for child */
- signal(SIGPIPE, SIG_DFL);
+ signal(SIGPIPE, SIG_DFL);
if (options.use_login) {
launch_login(pw, hostname);
struct stat st;
u_int len;
int success = 0;
- char *cmd, *subsys = packet_get_string(&len);
+ char *prog, *cmd, *subsys = packet_get_string(&len);
u_int i;
packet_check_eom();
for (i = 0; i < options.num_subsystems; i++) {
if (strcmp(subsys, options.subsystem_name[i]) == 0) {
- cmd = options.subsystem_command[i];
- if (stat(cmd, &st) < 0) {
- error("subsystem: cannot stat %s: %s", cmd,
+ prog = options.subsystem_command[i];
+ cmd = options.subsystem_args[i];
+ if (stat(prog, &st) < 0) {
+ error("subsystem: cannot stat %s: %s", prog,
strerror(errno));
break;
}
if (s->auth_proto != NULL || s->auth_data != NULL) {
error("session_x11_req: session %d: "
- "x11 fowarding already active", s->self);
+ "x11 forwarding already active", s->self);
return 0;
}
s->single_connection = packet_get_char();
for (i = 0; i < options.num_accept_env; i++) {
if (match_pattern(name, options.accept_env[i])) {
debug2("Setting env %d: %s=%s", s->num_env, name, val);
- s->env = xrealloc(s->env, sizeof(*s->env) *
- (s->num_env + 1));
+ s->env = xrealloc(s->env, s->num_env + 1,
+ sizeof(*s->env));
s->env[s->num_env].name = name;
s->env[s->num_env].val = val;
s->num_env++;
*/
if (s->chanid == -1)
fatal("no channel for session %d", s->self);
- channel_set_fds(s->chanid,
- fdout, fdin, fderr,
- fderr == -1 ? CHAN_EXTENDED_IGNORE : CHAN_EXTENDED_READ,
- 1,
- CHAN_SES_WINDOW_DEFAULT);
+ if(options.hpn_disabled)
+ channel_set_fds(s->chanid,
+ fdout, fdin, fderr,
+ fderr == -1 ? CHAN_EXTENDED_IGNORE : CHAN_EXTENDED_READ,
+ 1,
+ CHAN_SES_WINDOW_DEFAULT);
+ else
+ channel_set_fds(s->chanid,
+ fdout, fdin, fderr,
+ fderr == -1 ? CHAN_EXTENDED_IGNORE : CHAN_EXTENDED_READ,
+ 1,
+ options.hpn_buffer_size);
}
/*
{
Channel *c;
- if ((c = channel_lookup(id)) == NULL) {
+ if ((c = channel_by_id(id)) == NULL) {
debug("session_close_x11: x11 channel %d missing", id);
} else {
/* Detach X11 listener */
session_exit_message(Session *s, int status)
{
Channel *c;
- u_int i;
if ((c = channel_lookup(s->chanid)) == NULL)
fatal("session_exit_message: session %d: no channel %d",
/* disconnect channel */
debug("session_exit_message: release channel %d", s->chanid);
- channel_cancel_cleanup(s->chanid);
+
+ /*
+ * Adjust cleanup callback attachment to send close messages when
+ * the channel gets EOF. The session will be then be closed
+ * by session_close_by_channel when the childs close their fds.
+ */
+ channel_register_cleanup(c->self, session_close_by_channel, 1);
+
/*
* emulate a write failure with 'chan_write_failed', nobody will be
* interested in data we write.
*/
if (c->ostate != CHAN_OUTPUT_CLOSED)
chan_write_failed(c);
- s->chanid = -1;
-
- /* Close any X11 listeners associated with this session */
- if (s->x11_chanids != NULL) {
- for (i = 0; s->x11_chanids[i] != -1; i++) {
- session_close_x11(s->x11_chanids[i]);
- s->x11_chanids[i] = -1;
- }
- }
}
void
if (s->auth_proto)
xfree(s->auth_proto);
s->used = 0;
- for (i = 0; i < s->num_env; i++) {
- xfree(s->env[i].name);
- xfree(s->env[i].val);
- }
- if (s->env != NULL)
+ if (s->env != NULL) {
+ for (i = 0; i < s->num_env; i++) {
+ xfree(s->env[i].name);
+ xfree(s->env[i].val);
+ }
xfree(s->env);
+ }
session_proctitle(s);
}
}
if (s->chanid != -1)
session_exit_message(s, status);
- session_close(s);
+ if (s->ttyfd != -1)
+ session_pty_cleanup(s);
+ s->pid = 0;
}
/*
session_close_by_channel(int id, void *arg)
{
Session *s = session_by_channel(id);
+ u_int i;
if (s == NULL) {
debug("session_close_by_channel: no session for id %d", id);
}
/* detach by removing callback */
channel_cancel_cleanup(s->chanid);
+
+ /* Close any X11 listeners associated with this session */
+ if (s->x11_chanids != NULL) {
+ for (i = 0; s->x11_chanids[i] != -1; i++) {
+ session_close_x11(s->x11_chanids[i]);
+ s->x11_chanids[i] = -1;
+ }
+ }
+
s->chanid = -1;
session_close(s);
}
}
if (x11_create_display_inet(options.x11_display_offset,
options.x11_use_localhost, s->single_connection,
- &s->display_number, &s->x11_chanids) == -1) {
+ &s->display_number, &s->x11_chanids,
+ options.hpn_disabled, options.hpn_buffer_size) == -1) {
debug("x11_create_display_inet failed.");
return 0;
}
for (i = 0; s->x11_chanids[i] != -1; i++) {
channel_register_cleanup(s->x11_chanids[i],
- session_close_single_x11);
+ session_close_single_x11, 0);
}
/* Set up a suitable value for the DISPLAY variable. */
return;
called = 1;
- if (authctxt == NULL)
+ if (authctxt == NULL || !authctxt->authenticated)
return;
#ifdef KRB5
if (options.kerberos_ticket_cleanup &&
andersk / gssapi-openssh.git / blobdiff