*/
#include "includes.h"
-RCSID("$OpenBSD: session.c,v 1.98 2001/07/02 13:59:15 markus Exp $");
+RCSID("$OpenBSD: session.c,v 1.154 2003/03/05 22:33:43 markus Exp $");
#include "ssh.h"
#include "ssh1.h"
#include "serverloop.h"
#include "canohost.h"
#include "session.h"
-
-#ifdef WITH_IRIX_PROJECT
-#include <proj.h>
-#endif /* WITH_IRIX_PROJECT */
-#ifdef WITH_IRIX_JOBS
-#include <sys/resource.h>
-#endif
-#ifdef WITH_IRIX_AUDIT
-#include <sat.h>
-#endif /* WITH_IRIX_AUDIT */
-
-#if defined(HAVE_USERSEC_H)
-#include <usersec.h>
-#endif
+#include "monitor_wrap.h"
#ifdef HAVE_CYGWIN
#include <windows.h>
#define is_winnt (GetVersion() < 0x80000000)
#endif
-/* AIX limits */
-#if defined(HAVE_GETUSERATTR) && !defined(S_UFSIZE_HARD) && defined(S_UFSIZE)
-# define S_UFSIZE_HARD S_UFSIZE "_hard"
-# define S_UCPU_HARD S_UCPU "_hard"
-# define S_UDATA_HARD S_UDATA "_hard"
-# define S_USTACK_HARD S_USTACK "_hard"
-# define S_URSS_HARD S_URSS "_hard"
-# define S_UCORE_HARD S_UCORE "_hard"
-# define S_UNOFILE_HARD S_UNOFILE "_hard"
-#endif
-
-#ifdef _AIX
-# include <uinfo.h>
-#endif
-
-/* types */
-
-#define TTYSZ 64
-typedef struct Session Session;
-struct Session {
- int used;
- int self;
- struct passwd *pw;
- Authctxt *authctxt;
- pid_t pid;
- /* tty */
- char *term;
- int ptyfd, ttyfd, ptymaster;
- int row, col, xpixel, ypixel;
- char tty[TTYSZ];
- /* X11 */
- char *display;
- int screen;
- char *auth_proto;
- char *auth_data;
- int single_connection;
- /* proto 2 */
- int chanid;
- int is_subsystem;
-};
-
/* func */
Session *session_new(void);
-void session_set_fds(Session *, int, int, int);
-static void session_pty_cleanup(void *);
-void session_proctitle(Session *);
-int session_setup_x11fwd(Session *);
-void do_exec_pty(Session *, const char *);
-void do_exec_no_pty(Session *, const char *);
-void do_exec(Session *, const char *);
-void do_login(Session *, const char *);
-void do_child(Session *, const char *);
+void session_set_fds(Session *, int, int, int);
+void session_pty_cleanup(void *);
+void session_proctitle(Session *);
+int session_setup_x11fwd(Session *);
+void do_exec_pty(Session *, const char *);
+void do_exec_no_pty(Session *, const char *);
+void do_exec(Session *, const char *);
+void do_login(Session *, const char *);
+#ifdef LOGIN_NEEDS_UTMPX
+static void do_pre_login(Session *s);
+#endif
+void do_child(Session *, const char *);
void do_motd(void);
+int check_quietlogin(Session *, const char *);
static void do_authenticated1(Authctxt *);
static void do_authenticated2(Authctxt *);
-
-static void session_close(Session *);
+
static int session_pty_req(Session *);
/* import */
Session sessions[MAX_SESSIONS];
#ifdef WITH_AIXAUTHENTICATE
-/* AIX's lastlogin message, set in auth1.c */
char *aixloginmsg;
#endif /* WITH_AIXAUTHENTICATE */
#ifdef HAVE_LOGIN_CAP
-static login_cap_t *lc;
+login_cap_t *lc;
#endif
+/* Name and directory of socket for authentication agent forwarding. */
+static char *auth_sock_name = NULL;
+static char *auth_sock_dir = NULL;
+
+/* removes the agent forwarding socket */
+
+static void
+auth_sock_cleanup_proc(void *_pw)
+{
+ struct passwd *pw = _pw;
+
+ if (auth_sock_name != NULL) {
+ temporarily_use_uid(pw);
+ unlink(auth_sock_name);
+ rmdir(auth_sock_dir);
+ auth_sock_name = NULL;
+ restore_uid();
+ }
+}
+
+static int
+auth_input_request_forwarding(struct passwd * pw)
+{
+ Channel *nc;
+ int sock;
+ struct sockaddr_un sunaddr;
+
+ if (auth_sock_name != NULL) {
+ error("authentication forwarding requested twice.");
+ return 0;
+ }
+
+ /* Temporarily drop privileged uid for mkdir/bind. */
+ temporarily_use_uid(pw);
+
+ /* Allocate a buffer for the socket name, and format the name. */
+ auth_sock_name = xmalloc(MAXPATHLEN);
+ auth_sock_dir = xmalloc(MAXPATHLEN);
+ strlcpy(auth_sock_dir, "/tmp/ssh-XXXXXXXX", MAXPATHLEN);
+
+ /* Create private directory for socket */
+ if (mkdtemp(auth_sock_dir) == NULL) {
+ packet_send_debug("Agent forwarding disabled: "
+ "mkdtemp() failed: %.100s", strerror(errno));
+ restore_uid();
+ xfree(auth_sock_name);
+ xfree(auth_sock_dir);
+ auth_sock_name = NULL;
+ auth_sock_dir = NULL;
+ return 0;
+ }
+ snprintf(auth_sock_name, MAXPATHLEN, "%s/agent.%ld",
+ auth_sock_dir, (long) getpid());
+
+ /* delete agent socket on fatal() */
+ fatal_add_cleanup(auth_sock_cleanup_proc, pw);
+
+ /* Create the socket. */
+ sock = socket(AF_UNIX, SOCK_STREAM, 0);
+ if (sock < 0)
+ packet_disconnect("socket: %.100s", strerror(errno));
+
+ /* Bind it to the name. */
+ memset(&sunaddr, 0, sizeof(sunaddr));
+ 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)
+ packet_disconnect("bind: %.100s", strerror(errno));
+
+ /* Restore the privileged uid. */
+ restore_uid();
+
+ /* Start listening on the socket. */
+ if (listen(sock, 5) < 0)
+ packet_disconnect("listen: %.100s", strerror(errno));
+
+ /* Allocate a channel for the authentication agent socket. */
+ nc = channel_new("auth socket",
+ SSH_CHANNEL_AUTH_SOCKET, sock, sock, -1,
+ CHAN_X11_WINDOW_DEFAULT, CHAN_X11_PACKET_DEFAULT,
+ 0, xstrdup("auth socket"), 1);
+ strlcpy(nc->path, auth_sock_name, sizeof(nc->path));
+ return 1;
+}
+
+
void
do_authenticated(Authctxt *authctxt)
{
+ setproctitle("%s", authctxt->pw->pw_name);
+
/*
* Cancel the alarm we set to limit the time taken for
* authentication.
close(startup_pipe);
startup_pipe = -1;
}
-#if defined(HAVE_LOGIN_CAP) && defined(HAVE_PW_CLASS_IN_PASSWD)
- if ((lc = login_getclass(authctxt->pw->pw_class)) == NULL) {
- error("unable to get login class");
- return;
- }
-#ifdef BSD_AUTH
- if (auth_approval(NULL, lc, authctxt->pw->pw_name, "ssh") <= 0) {
- packet_disconnect("Approval failure for %s",
- authctxt->pw->pw_name);
- }
-#endif
-#endif
+
/* setup the channel layer */
if (!no_port_forwarding_flag && options.allow_tcp_forwarding)
channel_permit_all_opens();
do_authenticated1(authctxt);
/* remove agent socket */
- if (auth_get_socket_name())
+ if (auth_sock_name != NULL)
auth_sock_cleanup_proc(authctxt->pw);
#ifdef KRB4
if (options.kerberos_ticket_cleanup)
{
Session *s;
char *command;
- int success, type, plen, screen_flag;
- int compression_level = 0, enable_compression_after_reply = 0;
- u_int proto_len, data_len, dlen;
+ int success, type, screen_flag;
+ int enable_compression_after_reply = 0;
+ u_int proto_len, data_len, dlen, compression_level = 0;
s = session_new();
s->authctxt = authctxt;
success = 0;
/* Get a packet from the client. */
- type = packet_read(&plen);
+ type = packet_read();
/* Process the packet. */
switch (type) {
case SSH_CMSG_REQUEST_COMPRESSION:
- packet_integrity_check(plen, 4, type);
compression_level = packet_get_int();
+ packet_check_eom();
if (compression_level < 1 || compression_level > 9) {
packet_send_debug("Received illegal compression level %d.",
- compression_level);
+ compression_level);
+ break;
+ }
+ if (!options.compression) {
+ debug2("compression disabled");
break;
}
/* Enable compression after we have responded with SUCCESS. */
} else {
s->screen = 0;
}
- packet_done();
+ packet_check_eom();
success = session_setup_x11fwd(s);
if (!success) {
xfree(s->auth_proto);
if (packet_set_maxsize(packet_get_int()) > 0)
success = 1;
break;
-
+
#if defined(AFS) || defined(KRB5)
case SSH_CMSG_HAVE_KERBEROS_TGT:
if (!options.kerberos_tgt_passing) {
verbose("Kerberos TGT passing disabled.");
} else {
char *kdata = packet_get_string(&dlen);
- packet_integrity_check(plen, 4 + dlen, type);
-
+ packet_check_eom();
+
/* XXX - 0x41, see creds_to_radix version */
if (kdata[0] != 0x41) {
#ifdef KRB5
krb5_data tgt;
tgt.data = kdata;
tgt.length = dlen;
-
+
if (auth_krb5_tgt(s->authctxt, &tgt))
success = 1;
else
}
break;
#endif /* AFS || KRB5 */
-
+
#ifdef AFS
case SSH_CMSG_HAVE_AFS_TOKEN:
if (!options.afs_token_passing || !k_hasafs()) {
} else {
/* Accept AFS token. */
char *token = packet_get_string(&dlen);
- packet_integrity_check(plen, 4 + dlen, type);
-
+ packet_check_eom();
+
if (auth_afs_token(s->authctxt, token))
success = 1;
else
} else {
do_exec(s, NULL);
}
- packet_done();
+ packet_check_eom();
session_close(s);
return;
* Any unknown messages in this phase are ignored,
* and a failure message is returned.
*/
- log("Unknown packet type received after authentication: %d", type);
+ logit("Unknown packet type received after authentication: %d", type);
}
packet_start(success ? SSH_SMSG_SUCCESS : SSH_SMSG_FAILURE);
packet_send();
void
do_exec_no_pty(Session *s, const char *command)
{
- int pid;
+ pid_t pid;
#ifdef USE_PIPES
int pin[2], pout[2], perr[2];
#if defined(USE_PAM)
do_pam_session(s->pw->pw_name, NULL);
do_pam_setcred(1);
+ if (is_pam_password_change_required())
+ packet_disconnect("Password change required but no "
+ "TTY available");
#endif /* USE_PAM */
/* Fork the child. */
if ((pid = fork()) == 0) {
+ fatal_remove_all_cleanups();
+
/* Child. Reinitialize the log since the pid has changed. */
log_init(__progname, options.log_level, options.log_facility, log_stderr);
perror("dup2 stderr");
#endif /* USE_PIPES */
+#ifdef _UNICOS
+ cray_init_job(s->pw); /* set up cray jid and tmpdir */
+#endif
+
/* Do processing for the child (exec command etc). */
do_child(s, command);
/* NOTREACHED */
}
+#ifdef _UNICOS
+ signal(WJSIGNAL, cray_job_termination_handler);
+#endif /* _UNICOS */
#ifdef HAVE_CYGWIN
if (is_winnt)
cygwin_set_impersonation_token(INVALID_HANDLE_VALUE);
/* Fork the child. */
if ((pid = fork()) == 0) {
+ fatal_remove_all_cleanups();
/* Child. Reinitialize the log because the pid has changed. */
log_init(__progname, options.log_level, options.log_facility, log_stderr);
/* Make the pseudo tty our controlling tty. */
pty_make_controlling_tty(&ttyfd, s->tty);
- /* Redirect stdin from the pseudo tty. */
- if (dup2(ttyfd, fileno(stdin)) < 0)
- error("dup2 stdin failed: %.100s", strerror(errno));
-
- /* Redirect stdout to the pseudo tty. */
- if (dup2(ttyfd, fileno(stdout)) < 0)
- error("dup2 stdin failed: %.100s", strerror(errno));
-
- /* Redirect stderr to the pseudo tty. */
- if (dup2(ttyfd, fileno(stderr)) < 0)
- error("dup2 stdin failed: %.100s", strerror(errno));
+ /* Redirect stdin/stdout/stderr from the pseudo tty. */
+ if (dup2(ttyfd, 0) < 0)
+ error("dup2 stdin: %s", strerror(errno));
+ if (dup2(ttyfd, 1) < 0)
+ error("dup2 stdout: %s", strerror(errno));
+ if (dup2(ttyfd, 2) < 0)
+ error("dup2 stderr: %s", strerror(errno));
/* Close the extra descriptor for the pseudo tty. */
close(ttyfd);
/* record login, etc. similar to login(1) */
#ifndef HAVE_OSF_SIA
- if (!(options.use_login && command == NULL))
+ if (!(options.use_login && command == NULL)) {
+#ifdef _UNICOS
+ cray_init_job(s->pw); /* set up cray jid and tmpdir */
+#endif /* _UNICOS */
do_login(s, command);
+ }
# ifdef LOGIN_NEEDS_UTMPX
else
do_pre_login(s);
do_child(s, command);
/* NOTREACHED */
}
+#ifdef _UNICOS
+ signal(WJSIGNAL, cray_job_termination_handler);
+#endif /* _UNICOS */
#ifdef HAVE_CYGWIN
if (is_winnt)
cygwin_set_impersonation_token(INVALID_HANDLE_VALUE);
}
#ifdef LOGIN_NEEDS_UTMPX
-void
+static void
do_pre_login(Session *s)
{
socklen_t fromlen;
* the address be 0.0.0.0.
*/
memset(&from, 0, sizeof(from));
+ fromlen = sizeof(from);
if (packet_connection_is_on_socket()) {
- fromlen = sizeof(from);
if (getpeername(packet_get_connection_in(),
- (struct sockaddr *) & from, &fromlen) < 0) {
+ (struct sockaddr *) & from, &fromlen) < 0) {
debug("getpeername: %.100s", strerror(errno));
fatal_cleanup();
}
}
record_utmp_only(pid, s->tty, s->pw->pw_name,
- get_remote_name_or_ip(utmp_len, options.reverse_mapping_check),
- (struct sockaddr *)&from);
+ get_remote_name_or_ip(utmp_len, options.verify_reverse_mapping),
+ (struct sockaddr *)&from, fromlen);
}
#endif
original_command = NULL;
}
-/*
- * Check for quiet login, either .hushlogin or command given.
- */
-static int
-check_quietlogin(Session *s, const char *command)
-{
- char buf[256];
- struct passwd *pw = s->pw;
- struct stat st;
-
- /* Return 1 if .hushlogin exists or a command given. */
- if (command != NULL)
- return 1;
- snprintf(buf, sizeof(buf), "%.200s/.hushlogin", pw->pw_dir);
-#ifdef HAVE_LOGIN_CAP
- if (login_getcapbool(lc, "hushlogin", 0) || stat(buf, &st) >= 0)
- return 1;
-#else
- if (stat(buf, &st) >= 0)
- return 1;
-#endif
- return 0;
-}
/* administrative, login(1)-like work */
void
do_login(Session *s, const char *command)
{
char *time_string;
- char hostname[MAXHOSTNAMELEN];
socklen_t fromlen;
struct sockaddr_storage from;
- time_t last_login_time;
struct passwd * pw = s->pw;
pid_t pid = getpid();
* the address be 0.0.0.0.
*/
memset(&from, 0, sizeof(from));
+ fromlen = sizeof(from);
if (packet_connection_is_on_socket()) {
- fromlen = sizeof(from);
if (getpeername(packet_get_connection_in(),
- (struct sockaddr *) & from, &fromlen) < 0) {
+ (struct sockaddr *) & from, &fromlen) < 0) {
debug("getpeername: %.100s", strerror(errno));
fatal_cleanup();
}
}
- /* Get the time and hostname when the user last logged in. */
- if (options.print_lastlog) {
- hostname[0] = '\0';
- last_login_time = get_last_login_time(pw->pw_uid, pw->pw_name,
- hostname, sizeof(hostname));
- }
-
/* Record that there was a login on that tty from the remote host. */
- record_login(pid, s->tty, pw->pw_name, pw->pw_uid,
- get_remote_name_or_ip(utmp_len, options.reverse_mapping_check),
- (struct sockaddr *)&from);
+ if (!use_privsep)
+ record_login(pid, s->tty, pw->pw_name, pw->pw_uid,
+ get_remote_name_or_ip(utmp_len,
+ options.verify_reverse_mapping),
+ (struct sockaddr *)&from, fromlen);
#ifdef USE_PAM
/*
printf("%s\n", aixloginmsg);
#endif /* WITH_AIXAUTHENTICATE */
- if (options.print_lastlog && last_login_time != 0) {
- time_string = ctime(&last_login_time);
+#ifndef NO_SSH_LASTLOG
+ if (options.print_lastlog && s->last_login_time != 0) {
+ time_string = ctime(&s->last_login_time);
if (strchr(time_string, '\n'))
*strchr(time_string, '\n') = 0;
- if (strcmp(hostname, "") == 0)
+ if (strcmp(s->hostname, "") == 0)
printf("Last login: %s\r\n", time_string);
else
- printf("Last login: %s from %s\r\n", time_string, hostname);
+ printf("Last login: %s from %s\r\n", time_string,
+ s->hostname);
}
+#endif /* NO_SSH_LASTLOG */
do_motd();
}
}
}
+
+/*
+ * Check for quiet login, either .hushlogin or command given.
+ */
+int
+check_quietlogin(Session *s, const char *command)
+{
+ char buf[256];
+ struct passwd *pw = s->pw;
+ struct stat st;
+
+ /* Return 1 if .hushlogin exists or a command given. */
+ if (command != NULL)
+ return 1;
+ snprintf(buf, sizeof(buf), "%.200s/.hushlogin", pw->pw_dir);
+#ifdef HAVE_LOGIN_CAP
+ if (login_getcapbool(lc, "hushlogin", 0) || stat(buf, &st) >= 0)
+ return 1;
+#else
+ if (stat(buf, &st) >= 0)
+ return 1;
+#endif
+ return 0;
+}
+
/*
* Sets the value of the given variable in the environment. If the variable
* already exists, its value is overriden.
*/
static void
child_set_env(char ***envp, u_int *envsizep, const char *name,
- const char *value)
+ const char *value)
{
u_int i, namelen;
char **env;
} else {
/* New variable. Expand if necessary. */
if (i >= (*envsizep) - 1) {
+ if (*envsizep >= 1000)
+ fatal("child_set_env: too many env vars,"
+ " skipping: %.100s", name);
(*envsizep) += 50;
env = (*envp) = xrealloc(env, (*envsizep) * sizeof(char *));
}
*/
static void
read_environment_file(char ***env, u_int *envsize,
- const char *filename)
+ const char *filename)
{
FILE *f;
char buf[4096];
char *cp, *value;
+ u_int lineno = 0;
f = fopen(filename, "r");
if (!f)
return;
while (fgets(buf, sizeof(buf), f)) {
+ if (++lineno > 1000)
+ fatal("Too many lines in environment file %s", filename);
for (cp = buf; *cp == ' ' || *cp == '\t'; cp++)
;
if (!*cp || *cp == '#' || *cp == '\n')
*strchr(cp, '\n') = '\0';
value = strchr(cp, '=');
if (value == NULL) {
- fprintf(stderr, "Bad line in %.100s: %.200s\n", filename, buf);
+ fprintf(stderr, "Bad line %u in %.100s\n", lineno,
+ filename);
continue;
}
/*
fclose(f);
}
-#ifdef USE_PAM
-/*
- * Sets any environment variables which have been specified by PAM
- */
-void do_pam_environment(char ***env, u_int *envsize)
+void copy_environment(char **source, char ***env, u_int *envsize)
{
- char *equals, var_name[512], var_val[512];
- char **pam_env;
+ char *var_name, *var_val;
int i;
- if ((pam_env = fetch_pam_environment()) == NULL)
+ if (source == NULL)
return;
- for(i = 0; pam_env[i] != NULL; i++) {
- if ((equals = strstr(pam_env[i], "=")) == NULL)
+ for(i = 0; source[i] != NULL; i++) {
+ var_name = xstrdup(source[i]);
+ if ((var_val = strstr(var_name, "=")) == NULL) {
+ xfree(var_name);
continue;
-
- if (strlen(pam_env[i]) < (sizeof(var_name) - 1)) {
- memset(var_name, '\0', sizeof(var_name));
- memset(var_val, '\0', sizeof(var_val));
-
- strncpy(var_name, pam_env[i], equals - pam_env[i]);
- strcpy(var_val, equals + 1);
-
- debug3("PAM environment: %s=%s", var_name, var_val);
-
- child_set_env(env, envsize, var_name, var_val);
}
- }
-}
-#endif /* USE_PAM */
-
-#ifdef HAVE_CYGWIN
-void copy_environment(char ***env, u_int *envsize)
-{
- char *equals, var_name[512], var_val[512];
- int i;
-
- for(i = 0; environ[i] != NULL; i++) {
- if ((equals = strstr(environ[i], "=")) == NULL)
- continue;
-
- if (strlen(environ[i]) < (sizeof(var_name) - 1)) {
- memset(var_name, '\0', sizeof(var_name));
- memset(var_val, '\0', sizeof(var_val));
-
- strncpy(var_name, environ[i], equals - environ[i]);
- strcpy(var_val, equals + 1);
-
- debug3("Copy environment: %s=%s", var_name, var_val);
-
- child_set_env(env, envsize, var_name, var_val);
- }
- }
-}
-#endif
-
-#if defined(HAVE_GETUSERATTR)
-/*
- * AIX-specific login initialisation
- */
-void set_limit(char *user, char *soft, char *hard, int resource, int mult)
-{
- struct rlimit rlim;
- int slim, hlim;
-
- getrlimit(resource, &rlim);
-
- slim = 0;
- if (getuserattr(user, soft, &slim, SEC_INT) != -1) {
- if (slim < 0) {
- rlim.rlim_cur = RLIM_INFINITY;
- } else if (slim != 0) {
- /* See the wackiness below */
- if (rlim.rlim_cur == slim * mult)
- slim = 0;
- else
- rlim.rlim_cur = slim * mult;
- }
- }
+ *var_val++ = '\0';
- hlim = 0;
- if (getuserattr(user, hard, &hlim, SEC_INT) != -1) {
- if (hlim < 0) {
- rlim.rlim_max = RLIM_INFINITY;
- } else if (hlim != 0) {
- rlim.rlim_max = hlim * mult;
- }
- }
-
- /*
- * XXX For cpu and fsize the soft limit is set to the hard limit
- * if the hard limit is left at its default value and the soft limit
- * is changed from its default value, either by requesting it
- * (slim == 0) or by setting it to the current default. At least
- * that's how rlogind does it. If you're confused you're not alone.
- * Bug or feature? AIX 4.3.1.2
- */
- if ((!strcmp(soft, "fsize") || !strcmp(soft, "cpu"))
- && hlim == 0 && slim != 0)
- rlim.rlim_max = rlim.rlim_cur;
- /* A specified hard limit limits the soft limit */
- else if (hlim > 0 && rlim.rlim_cur > rlim.rlim_max)
- rlim.rlim_cur = rlim.rlim_max;
- /* A soft limit can increase a hard limit */
- else if (rlim.rlim_cur > rlim.rlim_max)
- rlim.rlim_max = rlim.rlim_cur;
-
- if (setrlimit(resource, &rlim) != 0)
- error("setrlimit(%.10s) failed: %.100s", soft, strerror(errno));
-}
-
-void set_limits_from_userattr(char *user)
-{
- int mask;
- char buf[16];
-
- set_limit(user, S_UFSIZE, S_UFSIZE_HARD, RLIMIT_FSIZE, 512);
- set_limit(user, S_UCPU, S_UCPU_HARD, RLIMIT_CPU, 1);
- set_limit(user, S_UDATA, S_UDATA_HARD, RLIMIT_DATA, 512);
- set_limit(user, S_USTACK, S_USTACK_HARD, RLIMIT_STACK, 512);
- set_limit(user, S_URSS, S_URSS_HARD, RLIMIT_RSS, 512);
- set_limit(user, S_UCORE, S_UCORE_HARD, RLIMIT_CORE, 512);
-#if defined(S_UNOFILE)
- set_limit(user, S_UNOFILE, S_UNOFILE_HARD, RLIMIT_NOFILE, 1);
-#endif
-
- if (getuserattr(user, S_UMASK, &mask, SEC_INT) != -1) {
- /* Convert decimal to octal */
- (void) snprintf(buf, sizeof(buf), "%d", mask);
- if (sscanf(buf, "%o", &mask) == 1)
- umask(mask);
+ debug3("Copy environment: %s=%s", var_name, var_val);
+ child_set_env(env, envsize, var_name, var_val);
+
+ xfree(var_name);
}
}
-#endif /* defined(HAVE_GETUSERATTR) */
-/*
- * Performs common processing for the child, such as setting up the
- * environment, closing extra file descriptors, setting the user and group
- * ids, and executing the command or shell.
- */
-void
-do_child(Session *s, const char *command)
+static char **
+do_setup_env(Session *s, const char *shell)
{
- const char *shell, *hostname = NULL, *cp = NULL;
- struct passwd *pw = s->pw;
char buf[256];
- char cmd[1024];
- FILE *f = NULL;
- u_int envsize, i;
- char **env;
- extern char **environ;
- struct stat st;
- char *argv[10];
- int do_xauth;
-#ifdef WITH_IRIX_PROJECT
- prid_t projid;
-#endif /* WITH_IRIX_PROJECT */
-#ifdef WITH_IRIX_JOBS
- jid_t jid = 0;
-#else
-#ifdef WITH_IRIX_ARRAY
- int jid = 0;
-#endif /* WITH_IRIX_ARRAY */
-#endif /* WITH_IRIX_JOBS */
-
- do_xauth =
- s->display != NULL && s->auth_proto != NULL && s->auth_data != NULL;
-
- /* remove hostkey from the child's memory */
- destroy_sensitive_data();
-
- /* login(1) is only called if we execute the login shell */
- if (options.use_login && command != NULL)
- options.use_login = 0;
-
-#if !defined(USE_PAM) && !defined(HAVE_OSF_SIA)
- if (!options.use_login) {
-# ifdef HAVE_LOGIN_CAP
- if (!login_getcapbool(lc, "ignorenologin", 0) && pw->pw_uid)
- f = fopen(login_getcapstr(lc, "nologin", _PATH_NOLOGIN,
- _PATH_NOLOGIN), "r");
-# else /* HAVE_LOGIN_CAP */
- if (pw->pw_uid)
- f = fopen(_PATH_NOLOGIN, "r");
-# endif /* HAVE_LOGIN_CAP */
- if (f) {
- /* /etc/nologin exists. Print its contents and exit. */
- while (fgets(buf, sizeof(buf), f))
- fputs(buf, stderr);
- fclose(f);
- exit(254);
- }
- }
-#endif /* USE_PAM || HAVE_OSF_SIA */
-
- /* Set login name, uid, gid, and groups. */
- /* Login(1) does this as well, and it needs uid 0 for the "-h"
- switch, so we let login(1) to this for us. */
- if (!options.use_login) {
-#ifdef HAVE_OSF_SIA
- session_setup_sia(pw->pw_name, s->ttyfd == -1 ? NULL : s->tty);
- if (!check_quietlogin(s, command))
- do_motd();
-#else /* HAVE_OSF_SIA */
-#ifdef HAVE_CYGWIN
- if (is_winnt) {
-#else
- if (getuid() == 0 || geteuid() == 0) {
-#endif
-# ifdef HAVE_GETUSERATTR
- set_limits_from_userattr(pw->pw_name);
-# endif /* HAVE_GETUSERATTR */
-# ifdef HAVE_LOGIN_CAP
- if (setusercontext(lc, pw, pw->pw_uid,
- (LOGIN_SETALL & ~LOGIN_SETPATH)) < 0) {
- perror("unable to set user context");
- exit(1);
- }
-# else /* HAVE_LOGIN_CAP */
-#if defined(HAVE_GETLUID) && defined(HAVE_SETLUID)
- /* Sets login uid for accounting */
- if (getluid() == -1 && setluid(pw->pw_uid) == -1)
- error("setluid: %s", strerror(errno));
-#endif /* defined(HAVE_GETLUID) && defined(HAVE_SETLUID) */
-
- if (setlogin(pw->pw_name) < 0)
- error("setlogin failed: %s", strerror(errno));
- if (setgid(pw->pw_gid) < 0) {
- perror("setgid");
- exit(1);
- }
- /* Initialize the group list. */
- if (initgroups(pw->pw_name, pw->pw_gid) < 0) {
- perror("initgroups");
- exit(1);
- }
- endgrent();
-# ifdef USE_PAM
- /*
- * PAM credentials may take the form of
- * supplementary groups. These will have been
- * wiped by the above initgroups() call.
- * Reestablish them here.
- */
- do_pam_setcred(0);
-# endif /* USE_PAM */
-# ifdef WITH_IRIX_JOBS
- jid = jlimit_startjob(pw->pw_name, pw->pw_uid, "interactive");
- if (jid == -1) {
- fatal("Failed to create job container: %.100s",
- strerror(errno));
- }
-# endif /* WITH_IRIX_JOBS */
-# ifdef WITH_IRIX_ARRAY
- /* initialize array session */
- if (jid == 0) {
- if (newarraysess() != 0)
- fatal("Failed to set up new array session: %.100s",
- strerror(errno));
- }
-# endif /* WITH_IRIX_ARRAY */
-# ifdef WITH_IRIX_PROJECT
- /* initialize irix project info */
- if ((projid = getdfltprojuser(pw->pw_name)) == -1) {
- debug("Failed to get project id, using projid 0");
- projid = 0;
- }
- if (setprid(projid))
- fatal("Failed to initialize project %d for %s: %.100s",
- (int)projid, pw->pw_name, strerror(errno));
-# endif /* WITH_IRIX_PROJECT */
-#ifdef WITH_IRIX_AUDIT
- if (sysconf(_SC_AUDIT)) {
- debug("Setting sat id to %d", (int) pw->pw_uid);
- if (satsetid(pw->pw_uid))
- debug("error setting satid: %.100s", strerror(errno));
- }
-#endif /* WITH_IRIX_AUDIT */
-
-#ifdef _AIX
- /*
- * AIX has a "usrinfo" area where logname and
- * other stuff is stored - a few applications
- * actually use this and die if it's not set
- */
- if (s->ttyfd == -1)
- s->tty[0] = '\0';
- cp = xmalloc(22 + strlen(s->tty) +
- 2 * strlen(pw->pw_name));
- i = sprintf(cp, "LOGNAME=%s%cNAME=%s%cTTY=%s%c%c",
- pw->pw_name, 0, pw->pw_name, 0, s->tty, 0, 0);
- if (usrinfo(SETUINFO, cp, i) == -1)
- fatal("Couldn't set usrinfo: %s",
- strerror(errno));
- debug3("AIX/UsrInfo: set len %d", i);
- xfree(cp);
-#endif
-
- /* Permanently switch to the desired uid. */
- permanently_set_uid(pw);
-# endif /* HAVE_LOGIN_CAP */
- }
-#endif /* HAVE_OSF_SIA */
-
-#ifdef HAVE_CYGWIN
- if (is_winnt)
-#endif
- if (getuid() != pw->pw_uid || geteuid() != pw->pw_uid)
- fatal("Failed to set uids to %u.", (u_int) pw->pw_uid);
- }
- /*
- * Get the shell from the password data. An empty shell field is
- * legal, and means /bin/sh.
- */
- shell = (pw->pw_shell[0] == '\0') ? _PATH_BSHELL : pw->pw_shell;
-#ifdef HAVE_LOGIN_CAP
- shell = login_getcapstr(lc, "shell", (char *)shell, (char *)shell);
-#endif
-
-#ifdef AFS
- /* Try to get AFS tokens for the local cell. */
- if (k_hasafs()) {
- char cell[64];
-
- if (k_afs_cell_of_file(pw->pw_dir, cell, sizeof(cell)) == 0)
- krb_afslog(cell, 0);
-
- krb_afslog(0, 0);
- }
-#endif /* AFS */
+ u_int i, envsize;
+ char **env, *laddr;
+ struct passwd *pw = s->pw;
/* Initialize the environment. */
envsize = 100;
* The Windows environment contains some setting which are
* important for a running system. They must not be dropped.
*/
- copy_environment(&env, &envsize);
+ copy_environment(environ, &env, &envsize);
#endif
if (!options.use_login) {
/* Set basic environment. */
child_set_env(&env, &envsize, "USER", pw->pw_name);
child_set_env(&env, &envsize, "LOGNAME", pw->pw_name);
+#ifdef _AIX
+ child_set_env(&env, &envsize, "LOGIN", pw->pw_name);
+#endif
child_set_env(&env, &envsize, "HOME", pw->pw_dir);
#ifdef HAVE_LOGIN_CAP
- (void) setusercontext(lc, pw, pw->pw_uid, LOGIN_SETPATH);
- child_set_env(&env, &envsize, "PATH", getenv("PATH"));
+ if (setusercontext(lc, pw, pw->pw_uid, LOGIN_SETPATH) < 0)
+ child_set_env(&env, &envsize, "PATH", _PATH_STDPATH);
+ else
+ child_set_env(&env, &envsize, "PATH", getenv("PATH"));
#else /* HAVE_LOGIN_CAP */
# ifndef HAVE_CYGWIN
/*
* needed for loading shared libraries. So the path better
* remains intact here.
*/
+# ifdef SUPERUSER_PATH
+ child_set_env(&env, &envsize, "PATH",
+ s->pw->pw_uid == 0 ? SUPERUSER_PATH : _PATH_STDPATH);
+# else
child_set_env(&env, &envsize, "PATH", _PATH_STDPATH);
+# endif /* SUPERUSER_PATH */
# endif /* HAVE_CYGWIN */
#endif /* HAVE_LOGIN_CAP */
child_set_env(&env, &envsize, "TZ", getenv("TZ"));
/* Set custom environment options from RSA authentication. */
- while (custom_environment) {
- struct envstring *ce = custom_environment;
- char *s = ce->s;
- int i;
- for (i = 0; s[i] != '=' && s[i]; i++);
- if (s[i] == '=') {
- s[i] = 0;
- child_set_env(&env, &envsize, s, s + i + 1);
+ if (!options.use_login) {
+ while (custom_environment) {
+ struct envstring *ce = custom_environment;
+ char *str = ce->s;
+
+ for (i = 0; str[i] != '=' && str[i]; i++)
+ ;
+ if (str[i] == '=') {
+ str[i] = 0;
+ child_set_env(&env, &envsize, str, str + i + 1);
+ }
+ custom_environment = ce->next;
+ xfree(ce->s);
+ xfree(ce);
}
- custom_environment = ce->next;
- xfree(ce->s);
- xfree(ce);
}
+ /* SSH_CLIENT deprecated */
snprintf(buf, sizeof buf, "%.50s %d %d",
- get_remote_ipaddr(), get_remote_port(), get_local_port());
+ get_remote_ipaddr(), get_remote_port(), get_local_port());
child_set_env(&env, &envsize, "SSH_CLIENT", buf);
+ laddr = get_local_ipaddr(packet_get_connection_in());
+ snprintf(buf, sizeof buf, "%.50s %d %.50s %d",
+ get_remote_ipaddr(), get_remote_port(), laddr, get_local_port());
+ xfree(laddr);
+ child_set_env(&env, &envsize, "SSH_CONNECTION", buf);
+
if (s->ttyfd != -1)
child_set_env(&env, &envsize, "SSH_TTY", s->tty);
if (s->term)
child_set_env(&env, &envsize, "SSH_ORIGINAL_COMMAND",
original_command);
+#ifdef _UNICOS
+ if (cray_tmpdir[0] != '\0')
+ child_set_env(&env, &envsize, "TMPDIR", cray_tmpdir);
+#endif /* _UNICOS */
+
#ifdef _AIX
- if ((cp = getenv("AUTHSTATE")) != NULL)
- child_set_env(&env, &envsize, "AUTHSTATE", cp);
- if ((cp = getenv("KRB5CCNAME")) != NULL)
- child_set_env(&env, &envsize, "KRB5CCNAME", cp);
- read_environment_file(&env, &envsize, "/etc/environment");
+ {
+ char *cp;
+
+ if ((cp = getenv("AUTHSTATE")) != NULL)
+ child_set_env(&env, &envsize, "AUTHSTATE", cp);
+ if ((cp = getenv("KRB5CCNAME")) != NULL)
+ child_set_env(&env, &envsize, "KRB5CCNAME", cp);
+ read_environment_file(&env, &envsize, "/etc/environment");
+ }
#endif
#ifdef KRB4
if (s->authctxt->krb4_ticket_file)
s->authctxt->krb5_ticket_file);
#endif
#ifdef USE_PAM
- /* Pull in any environment variables that may have been set by PAM. */
- do_pam_environment(&env, &envsize);
+ /*
+ * Pull in any environment variables that may have
+ * been set by PAM.
+ */
+ {
+ char **p;
+
+ p = fetch_pam_environment();
+ copy_environment(p, &env, &envsize);
+ free_pam_environment(p);
+ }
#endif /* USE_PAM */
- if (auth_get_socket_name() != NULL)
+ if (auth_sock_name != NULL)
child_set_env(&env, &envsize, SSH_AUTHSOCKET_ENV_NAME,
- auth_get_socket_name());
+ auth_sock_name);
/* read $HOME/.ssh/environment. */
- if (!options.use_login) {
+ if (options.permit_user_env && !options.use_login) {
snprintf(buf, sizeof buf, "%.200s/.ssh/environment",
- pw->pw_dir);
+ strcmp(pw->pw_dir, "/") ? pw->pw_dir : "");
read_environment_file(&env, &envsize, buf);
}
if (debug_flag) {
for (i = 0; env[i]; i++)
fprintf(stderr, " %.200s\n", env[i]);
}
+ return env;
+}
+
+/*
+ * Run $HOME/.ssh/rc, /etc/ssh/sshrc, or xauth (whichever is found
+ * first in this order).
+ */
+static void
+do_rc_files(Session *s, const char *shell)
+{
+ FILE *f = NULL;
+ char cmd[1024];
+ int do_xauth;
+ struct stat st;
+
+ do_xauth =
+ s->display != NULL && s->auth_proto != NULL && s->auth_data != NULL;
+
+ /* ignore _PATH_SSH_USER_RC for subsystems */
+ if (!s->is_subsystem && (stat(_PATH_SSH_USER_RC, &st) >= 0)) {
+ snprintf(cmd, sizeof cmd, "%s -c '%s %s'",
+ shell, _PATH_BSHELL, _PATH_SSH_USER_RC);
+ if (debug_flag)
+ fprintf(stderr, "Running %s\n", cmd);
+ f = popen(cmd, "w");
+ if (f) {
+ if (do_xauth)
+ fprintf(f, "%s %s\n", s->auth_proto,
+ s->auth_data);
+ pclose(f);
+ } else
+ fprintf(stderr, "Could not run %s\n",
+ _PATH_SSH_USER_RC);
+ } else if (stat(_PATH_SSH_SYSTEM_RC, &st) >= 0) {
+ if (debug_flag)
+ fprintf(stderr, "Running %s %s\n", _PATH_BSHELL,
+ _PATH_SSH_SYSTEM_RC);
+ f = popen(_PATH_BSHELL " " _PATH_SSH_SYSTEM_RC, "w");
+ if (f) {
+ if (do_xauth)
+ fprintf(f, "%s %s\n", s->auth_proto,
+ s->auth_data);
+ pclose(f);
+ } else
+ fprintf(stderr, "Could not run %s\n",
+ _PATH_SSH_SYSTEM_RC);
+ } else if (do_xauth && options.xauth_location != NULL) {
+ /* Add authority data to .Xauthority if appropriate. */
+ if (debug_flag) {
+ fprintf(stderr,
+ "Running %.500s remove %.100s\n",
+ options.xauth_location, s->auth_display);
+ fprintf(stderr,
+ "%.500s add %.100s %.100s %.100s\n",
+ options.xauth_location, s->auth_display,
+ s->auth_proto, s->auth_data);
+ }
+ snprintf(cmd, sizeof cmd, "%s -q -",
+ options.xauth_location);
+ f = popen(cmd, "w");
+ if (f) {
+ fprintf(f, "remove %s\n",
+ s->auth_display);
+ fprintf(f, "add %s %s %s\n",
+ s->auth_display, s->auth_proto,
+ s->auth_data);
+ pclose(f);
+ } else {
+ fprintf(stderr, "Could not run %s\n",
+ cmd);
+ }
+ }
+}
+
+static void
+do_nologin(struct passwd *pw)
+{
+ FILE *f = NULL;
+ char buf[1024];
+
+#ifdef HAVE_LOGIN_CAP
+ if (!login_getcapbool(lc, "ignorenologin", 0) && pw->pw_uid)
+ f = fopen(login_getcapstr(lc, "nologin", _PATH_NOLOGIN,
+ _PATH_NOLOGIN), "r");
+#else
+ if (pw->pw_uid)
+ f = fopen(_PATH_NOLOGIN, "r");
+#endif
+ if (f) {
+ /* /etc/nologin exists. Print its contents and exit. */
+ logit("User %.100s not allowed because %s exists",
+ pw->pw_name, _PATH_NOLOGIN);
+ while (fgets(buf, sizeof(buf), f))
+ fputs(buf, stderr);
+ fclose(f);
+ fflush(NULL);
+ exit(254);
+ }
+}
+
+/* Set login name, uid, gid, and groups. */
+void
+do_setusercontext(struct passwd *pw)
+{
+#ifndef HAVE_CYGWIN
+ if (getuid() == 0 || geteuid() == 0)
+#endif /* HAVE_CYGWIN */
+ {
+
+#ifdef HAVE_SETPCRED
+ setpcred(pw->pw_name);
+#endif /* HAVE_SETPCRED */
+#ifdef HAVE_LOGIN_CAP
+# ifdef __bsdi__
+ setpgid(0, 0);
+# endif
+ if (setusercontext(lc, pw, pw->pw_uid,
+ (LOGIN_SETALL & ~LOGIN_SETPATH)) < 0) {
+ perror("unable to set user context");
+ exit(1);
+ }
+#else
+# if defined(HAVE_GETLUID) && defined(HAVE_SETLUID)
+ /* Sets login uid for accounting */
+ if (getluid() == -1 && setluid(pw->pw_uid) == -1)
+ error("setluid: %s", strerror(errno));
+# endif /* defined(HAVE_GETLUID) && defined(HAVE_SETLUID) */
+
+ if (setlogin(pw->pw_name) < 0)
+ error("setlogin failed: %s", strerror(errno));
+ if (setgid(pw->pw_gid) < 0) {
+ perror("setgid");
+ exit(1);
+ }
+ /* Initialize the group list. */
+ if (initgroups(pw->pw_name, pw->pw_gid) < 0) {
+ perror("initgroups");
+ exit(1);
+ }
+ endgrent();
+# ifdef USE_PAM
+ /*
+ * PAM credentials may take the form of supplementary groups.
+ * These will have been wiped by the above initgroups() call.
+ * Reestablish them here.
+ */
+ do_pam_setcred(0);
+# endif /* USE_PAM */
+# if defined(WITH_IRIX_PROJECT) || defined(WITH_IRIX_JOBS) || defined(WITH_IRIX_ARRAY)
+ irix_setusercontext(pw);
+# endif /* defined(WITH_IRIX_PROJECT) || defined(WITH_IRIX_JOBS) || defined(WITH_IRIX_ARRAY) */
+# ifdef _AIX
+ aix_usrinfo(pw);
+# endif /* _AIX */
+ /* Permanently switch to the desired uid. */
+ permanently_set_uid(pw);
+#endif
+ }
+
+#ifdef HAVE_CYGWIN
+ if (is_winnt)
+#endif
+ if (getuid() != pw->pw_uid || geteuid() != pw->pw_uid)
+ fatal("Failed to set uids to %u.", (u_int) pw->pw_uid);
+}
+
+static void
+launch_login(struct passwd *pw, const char *hostname)
+{
+ /* Launch login(1). */
+
+ execl(LOGIN_PROGRAM, "login", "-h", hostname,
+#ifdef xxxLOGIN_NEEDS_TERM
+ (s->term ? s->term : "unknown"),
+#endif /* LOGIN_NEEDS_TERM */
+#ifdef LOGIN_NO_ENDOPT
+ "-p", "-f", pw->pw_name, (char *)NULL);
+#else
+ "-p", "-f", "--", pw->pw_name, (char *)NULL);
+#endif
+
+ /* Login couldn't be executed, die. */
+
+ perror("login");
+ exit(1);
+}
+
+/*
+ * Performs common processing for the child, such as setting up the
+ * environment, closing extra file descriptors, setting the user and group
+ * ids, and executing the command or shell.
+ */
+void
+do_child(Session *s, const char *command)
+{
+ extern char **environ;
+ char **env;
+ char *argv[10];
+ const char *shell, *shell0, *hostname = NULL;
+ struct passwd *pw = s->pw;
+ u_int i;
+
+ /* remove hostkey from the child's memory */
+ destroy_sensitive_data();
+
+ /* login(1) is only called if we execute the login shell */
+ if (options.use_login && command != NULL)
+ options.use_login = 0;
+
+#ifdef _UNICOS
+ cray_setup(pw->pw_uid, pw->pw_name, command);
+#endif /* _UNICOS */
+
+ /*
+ * Login(1) does this as well, and it needs uid 0 for the "-h"
+ * switch, so we let login(1) to this for us.
+ */
+ if (!options.use_login) {
+#ifdef HAVE_OSF_SIA
+ session_setup_sia(pw, s->ttyfd == -1 ? NULL : s->tty);
+ if (!check_quietlogin(s, command))
+ do_motd();
+#else /* HAVE_OSF_SIA */
+ do_nologin(pw);
+ do_setusercontext(pw);
+#endif /* HAVE_OSF_SIA */
+ }
+
+ /*
+ * Get the shell from the password data. An empty shell field is
+ * legal, and means /bin/sh.
+ */
+ shell = (pw->pw_shell[0] == '\0') ? _PATH_BSHELL : pw->pw_shell;
+
+ /*
+ * Make sure $SHELL points to the shell from the password file,
+ * even if shell is overridden from login.conf
+ */
+ env = do_setup_env(s, shell);
+
+#ifdef HAVE_LOGIN_CAP
+ shell = login_getcapstr(lc, "shell", (char *)shell, (char *)shell);
+#endif
+
/* we have to stash the hostname before we close our socket. */
if (options.use_login)
hostname = get_remote_name_or_ip(utmp_len,
- options.reverse_mapping_check);
+ options.verify_reverse_mapping);
/*
* Close the connection descriptors; note that this is the child, and
* the server will still have the socket open, and it is important
for (i = 3; i < 64; i++)
close(i);
+ /*
+ * Must take new environment into use so that .ssh/rc,
+ * /etc/ssh/sshrc and xauth are run in the proper environment.
+ */
+ environ = env;
+
+#ifdef AFS
+ /* Try to get AFS tokens for the local cell. */
+ if (k_hasafs()) {
+ char cell[64];
+
+ if (k_afs_cell_of_file(pw->pw_dir, cell, sizeof(cell)) == 0)
+ krb_afslog(cell, 0);
+
+ krb_afslog(0, 0);
+ }
+#endif /* AFS */
+
/* 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));
+ pw->pw_dir, strerror(errno));
#ifdef HAVE_LOGIN_CAP
if (login_getcapbool(lc, "requirehome", 0))
exit(1);
#endif
}
- /*
- * Must take new environment into use so that .ssh/rc, /etc/sshrc and
- * xauth are run in the proper environment.
- */
- environ = env;
-
- /*
- * Run $HOME/.ssh/rc, /etc/sshrc, or xauth (whichever is found first
- * in this order).
- */
- if (!options.use_login) {
- /* ignore _PATH_SSH_USER_RC for subsystems */
- if (!s->is_subsystem && (stat(_PATH_SSH_USER_RC, &st) >= 0)) {
- snprintf(cmd, sizeof cmd, "%s -c '%s %s'",
- shell, _PATH_BSHELL, _PATH_SSH_USER_RC);
- if (debug_flag)
- fprintf(stderr, "Running %s\n", cmd);
- f = popen(cmd, "w");
- if (f) {
- if (do_xauth)
- fprintf(f, "%s %s\n", s->auth_proto,
- s->auth_data);
- pclose(f);
- } else
- fprintf(stderr, "Could not run %s\n",
- _PATH_SSH_USER_RC);
- } else if (stat(_PATH_SSH_SYSTEM_RC, &st) >= 0) {
- if (debug_flag)
- fprintf(stderr, "Running %s %s\n", _PATH_BSHELL,
- _PATH_SSH_SYSTEM_RC);
- f = popen(_PATH_BSHELL " " _PATH_SSH_SYSTEM_RC, "w");
- if (f) {
- if (do_xauth)
- fprintf(f, "%s %s\n", s->auth_proto,
- s->auth_data);
- pclose(f);
- } else
- fprintf(stderr, "Could not run %s\n",
- _PATH_SSH_SYSTEM_RC);
- } else if (do_xauth && options.xauth_location != NULL) {
- /* Add authority data to .Xauthority if appropriate. */
- char *screen = strchr(s->display, ':');
-
- if (debug_flag) {
- fprintf(stderr,
- "Running %.100s add "
- "%.100s %.100s %.100s\n",
- options.xauth_location, s->display,
- s->auth_proto, s->auth_data);
- if (screen != NULL)
- fprintf(stderr,
- "Adding %.*s/unix%s %s %s\n",
- (int)(screen - s->display),
- s->display, screen,
- s->auth_proto, s->auth_data);
- }
- snprintf(cmd, sizeof cmd, "%s -q -",
- options.xauth_location);
- f = popen(cmd, "w");
- if (f) {
- fprintf(f, "add %s %s %s\n", s->display,
- s->auth_proto, s->auth_data);
- if (screen != NULL)
- fprintf(f, "add %.*s/unix%s %s %s\n",
- (int)(screen - s->display),
- s->display, screen,
- s->auth_proto,
- s->auth_data);
- pclose(f);
- } else {
- fprintf(stderr, "Could not run %s\n",
- cmd);
- }
- }
- /* Get the last component of the shell name. */
- cp = strrchr(shell, '/');
- if (cp)
- cp++;
- else
- cp = shell;
- }
+ if (!options.use_login)
+ do_rc_files(s, shell);
/* restore SIGPIPE for child */
signal(SIGPIPE, SIG_DFL);
+ if (options.use_login) {
+ launch_login(pw, hostname);
+ /* NEVERREACHED */
+ }
+
+ /* Get the last component of the shell name. */
+ if ((shell0 = strrchr(shell, '/')) != NULL)
+ shell0++;
+ else
+ shell0 = shell;
+
/*
* If we have no command, execute the shell. In this case, the shell
* name to be passed in argv[0] is preceded by '-' to indicate that
* this is a login shell.
*/
if (!command) {
- if (!options.use_login) {
- char buf[256];
-
- /*
- * Check for mail if we have a tty and it was enabled
- * in server options.
- */
- if (s->ttyfd != -1 && options.check_mail) {
- char *mailbox;
- struct stat mailstat;
-
- mailbox = getenv("MAIL");
- if (mailbox != NULL) {
- if (stat(mailbox, &mailstat) != 0 ||
- mailstat.st_size == 0)
- printf("No mail.\n");
- else if (mailstat.st_mtime < mailstat.st_atime)
- printf("You have mail.\n");
- else
- printf("You have new mail.\n");
- }
- }
- /* Start the shell. Set initial character to '-'. */
- buf[0] = '-';
- strncpy(buf + 1, cp, sizeof(buf) - 1);
- buf[sizeof(buf) - 1] = 0;
+ char argv0[256];
- /* Execute the shell. */
- argv[0] = buf;
- argv[1] = NULL;
- execve(shell, argv, env);
+ /* Start the shell. Set initial character to '-'. */
+ argv0[0] = '-';
- /* Executing the shell failed. */
+ if (strlcpy(argv0 + 1, shell0, sizeof(argv0) - 1)
+ >= sizeof(argv0) - 1) {
+ errno = EINVAL;
perror(shell);
exit(1);
+ }
- } else {
- /* Launch login(1). */
-
- execl(LOGIN_PROGRAM, "login", "-h", hostname,
-#ifdef LOGIN_NEEDS_TERM
- s->term? s->term : "unknown",
-#endif
- "-p", "-f", "--", pw->pw_name, NULL);
-
- /* Login couldn't be executed, die. */
+ /* Execute the shell. */
+ argv[0] = argv0;
+ argv[1] = NULL;
+ execve(shell, argv, env);
- perror("login");
- exit(1);
- }
+ /* Executing the shell failed. */
+ perror(shell);
+ exit(1);
}
/*
* Execute the command using the user's shell. This uses the -c
* option to execute the command.
*/
- argv[0] = (char *) cp;
+ argv[0] = (char *) shell0;
argv[1] = "-c";
argv[2] = (char *) command;
argv[3] = NULL;
static int did_init = 0;
if (!did_init) {
debug("session_new: init");
- for(i = 0; i < MAX_SESSIONS; i++) {
+ for (i = 0; i < MAX_SESSIONS; i++) {
sessions[i].used = 0;
}
did_init = 1;
}
- for(i = 0; i < MAX_SESSIONS; i++) {
+ for (i = 0; i < MAX_SESSIONS; i++) {
Session *s = &sessions[i];
if (! s->used) {
memset(s, 0, sizeof(*s));
session_dump(void)
{
int i;
- for(i = 0; i < MAX_SESSIONS; i++) {
+ for (i = 0; i < MAX_SESSIONS; i++) {
Session *s = &sessions[i];
- debug("dump: used %d session %d %p channel %d pid %d",
+ debug("dump: used %d session %d %p channel %d pid %ld",
s->used,
s->self,
s,
s->chanid,
- s->pid);
+ (long)s->pid);
}
}
return 1;
}
+Session *
+session_by_tty(char *tty)
+{
+ int i;
+ for (i = 0; i < MAX_SESSIONS; i++) {
+ Session *s = &sessions[i];
+ if (s->used && s->ttyfd != -1 && strcmp(s->tty, tty) == 0) {
+ debug("session_by_tty: session %d tty %s", i, tty);
+ return s;
+ }
+ }
+ debug("session_by_tty: unknown tty %.100s", tty);
+ session_dump();
+ return NULL;
+}
+
static Session *
session_by_channel(int id)
{
int i;
- for(i = 0; i < MAX_SESSIONS; i++) {
+ for (i = 0; i < MAX_SESSIONS; i++) {
Session *s = &sessions[i];
if (s->used && s->chanid == id) {
debug("session_by_channel: session %d channel %d", i, id);
session_by_pid(pid_t pid)
{
int i;
- debug("session_by_pid: pid %d", pid);
- for(i = 0; i < MAX_SESSIONS; i++) {
+ debug("session_by_pid: pid %ld", (long)pid);
+ for (i = 0; i < MAX_SESSIONS; i++) {
Session *s = &sessions[i];
if (s->used && s->pid == pid)
return s;
}
- error("session_by_pid: unknown pid %d", pid);
+ error("session_by_pid: unknown pid %ld", (long)pid);
session_dump();
return NULL;
}
s->row = packet_get_int();
s->xpixel = packet_get_int();
s->ypixel = packet_get_int();
- packet_done();
+ packet_check_eom();
pty_change_window_size(s->ptyfd, s->row, s->col, s->xpixel, s->ypixel);
return 1;
}
packet_disconnect("Protocol error: you already have a pty.");
return 0;
}
+ /* Get the time and hostname when the user last logged in. */
+ if (options.print_lastlog) {
+ s->hostname[0] = '\0';
+ s->last_login_time = get_last_login_time(s->pw->pw_uid,
+ s->pw->pw_name, s->hostname, sizeof(s->hostname));
+ }
s->term = packet_get_string(&len);
/* Allocate a pty and open it. */
debug("Allocating pty.");
- if (!pty_allocate(&s->ptyfd, &s->ttyfd, s->tty, sizeof(s->tty))) {
+ if (!PRIVSEP(pty_allocate(&s->ptyfd, &s->ttyfd, s->tty, sizeof(s->tty)))) {
if (s->term)
xfree(s->term);
s->term = NULL;
* time in case we call fatal() (e.g., the connection gets closed).
*/
fatal_add_cleanup(session_pty_cleanup, (void *)s);
- pty_setowner(s->pw, s->tty);
+ if (!use_privsep)
+ pty_setowner(s->pw, s->tty);
/* Set window size from the packet. */
pty_change_window_size(s->ptyfd, s->row, s->col, s->xpixel, s->ypixel);
- packet_done();
+ packet_check_eom();
session_proctitle(s);
return 1;
}
static int
session_subsystem_req(Session *s)
{
+ struct stat st;
u_int len;
int success = 0;
- char *subsys = packet_get_string(&len);
+ char *cmd, *subsys = packet_get_string(&len);
int i;
- packet_done();
- log("subsystem request for %s", subsys);
+ packet_check_eom();
+ logit("subsystem request for %.100s", subsys);
for (i = 0; i < options.num_subsystems; i++) {
- if(strcmp(subsys, options.subsystem_name[i]) == 0) {
- debug("subsystem: exec() %s", options.subsystem_command[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,
+ strerror(errno));
+ break;
+ }
+ debug("subsystem: exec() %s", cmd);
s->is_subsystem = 1;
- do_exec_no_pty(s, options.subsystem_command[i]);
+ do_exec(s, cmd);
success = 1;
+ break;
}
}
if (!success)
- log("subsystem request for %s failed, subsystem not found", subsys);
+ logit("subsystem request for %.100s failed, subsystem not found",
+ subsys);
xfree(subsys);
return success;
s->auth_proto = packet_get_string(NULL);
s->auth_data = packet_get_string(NULL);
s->screen = packet_get_int();
- packet_done();
+ packet_check_eom();
success = session_setup_x11fwd(s);
if (!success) {
static int
session_shell_req(Session *s)
{
- packet_done();
+ packet_check_eom();
do_exec(s, NULL);
return 1;
}
{
u_int len;
char *command = packet_get_string(&len);
- packet_done();
+ packet_check_eom();
do_exec(s, command);
xfree(command);
return 1;
session_auth_agent_req(Session *s)
{
static int called = 0;
- packet_done();
+ packet_check_eom();
if (no_agent_forwarding_flag) {
debug("session_auth_agent_req: no_agent_forwarding_flag");
return 0;
}
}
-void
-session_input_channel_req(int id, void *arg)
+int
+session_input_channel_req(Channel *c, const char *rtype)
{
- u_int len;
- int reply;
int success = 0;
- char *rtype;
Session *s;
- Channel *c;
-
- rtype = packet_get_string(&len);
- reply = packet_get_char();
-
- s = session_by_channel(id);
- if (s == NULL)
- fatal("session_input_channel_req: channel %d: no session", id);
- c = channel_lookup(id);
- if (c == NULL)
- fatal("session_input_channel_req: channel %d: bad channel", id);
- debug("session_input_channel_req: session %d channel %d request %s reply %d",
- s->self, id, rtype, reply);
+ if ((s = session_by_channel(c->self)) == NULL) {
+ logit("session_input_channel_req: no session %d req %.100s",
+ c->self, rtype);
+ return 0;
+ }
+ debug("session_input_channel_req: session %d req %s", s->self, rtype);
/*
* a session is in LARVAL state until a shell, a command
if (strcmp(rtype, "window-change") == 0) {
success = session_window_change_req(s);
}
-
- if (reply) {
- packet_start(success ?
- SSH2_MSG_CHANNEL_SUCCESS : SSH2_MSG_CHANNEL_FAILURE);
- packet_put_int(c->remote_id);
- packet_send();
- }
- xfree(rtype);
+ return success;
}
void
channel_set_fds(s->chanid,
fdout, fdin, fderr,
fderr == -1 ? CHAN_EXTENDED_IGNORE : CHAN_EXTENDED_READ,
- 1);
+ 1,
+ CHAN_SES_WINDOW_DEFAULT);
}
/*
* Function to perform pty cleanup. Also called if we get aborted abnormally
* (e.g., due to a dropped connection).
*/
-static void
-session_pty_cleanup(void *session)
+void
+session_pty_cleanup2(void *session)
{
Session *s = session;
/* Record that the user has logged out. */
if (s->pid != 0)
- record_logout(s->pid, s->tty);
+ record_logout(s->pid, s->tty, s->pw->pw_name);
/* Release the pseudo-tty. */
- pty_release(s->tty);
+ if (getuid() == 0)
+ pty_release(s->tty);
/*
* Close the server side of the socket pairs. We must do this after
* while we're still cleaning up.
*/
if (close(s->ptymaster) < 0)
- error("close(s->ptymaster): %s", strerror(errno));
+ error("close(s->ptymaster/%d): %s", s->ptymaster, strerror(errno));
+
+ /* unlink pty from session */
+ s->ttyfd = -1;
+}
+
+void
+session_pty_cleanup(void *session)
+{
+ PRIVSEP(session_pty_cleanup2(session));
+}
+
+static char *
+sig2name(int sig)
+{
+#define SSH_SIG(x) if (sig == SIG ## x) return #x
+ SSH_SIG(ABRT);
+ SSH_SIG(ALRM);
+ SSH_SIG(FPE);
+ SSH_SIG(HUP);
+ SSH_SIG(ILL);
+ SSH_SIG(INT);
+ SSH_SIG(KILL);
+ SSH_SIG(PIPE);
+ SSH_SIG(QUIT);
+ SSH_SIG(SEGV);
+ SSH_SIG(TERM);
+ SSH_SIG(USR1);
+ SSH_SIG(USR2);
+#undef SSH_SIG
+ return "SIG@openssh.com";
}
static void
session_exit_message(Session *s, int status)
{
Channel *c;
- if (s == NULL)
- fatal("session_close: no session");
- c = channel_lookup(s->chanid);
- if (c == NULL)
+
+ if ((c = channel_lookup(s->chanid)) == NULL)
fatal("session_exit_message: session %d: no channel %d",
s->self, s->chanid);
- debug("session_exit_message: session %d channel %d pid %d",
- s->self, s->chanid, s->pid);
+ debug("session_exit_message: session %d channel %d pid %ld",
+ s->self, s->chanid, (long)s->pid);
if (WIFEXITED(status)) {
- channel_request_start(s->chanid,
- "exit-status", 0);
+ channel_request_start(s->chanid, "exit-status", 0);
packet_put_int(WEXITSTATUS(status));
packet_send();
} else if (WIFSIGNALED(status)) {
- channel_request_start(s->chanid,
- "exit-signal", 0);
- packet_put_int(WTERMSIG(status));
+ channel_request_start(s->chanid, "exit-signal", 0);
+ packet_put_cstring(sig2name(WTERMSIG(status)));
#ifdef WCOREDUMP
packet_put_char(WCOREDUMP(status));
#else /* WCOREDUMP */
s->chanid = -1;
}
-static void
+void
session_close(Session *s)
{
- debug("session_close: session %d pid %d", s->self, s->pid);
+ debug("session_close: session %d pid %ld", s->self, (long)s->pid);
if (s->ttyfd != -1) {
fatal_remove_cleanup(session_pty_cleanup, (void *)s);
session_pty_cleanup(s);
xfree(s->term);
if (s->display)
xfree(s->display);
+ if (s->auth_display)
+ xfree(s->auth_display);
if (s->auth_data)
xfree(s->auth_data);
if (s->auth_proto)
{
Session *s = session_by_pid(pid);
if (s == NULL) {
- debug("session_close_by_pid: no session for pid %d", pid);
+ debug("session_close_by_pid: no session for pid %ld",
+ (long)pid);
return;
}
if (s->chanid != -1)
session_close(s);
}
-int
-session_have_children(void)
-{
- int i;
-
- for(i = 0; i < MAX_SESSIONS; i++) {
- Session *s = &sessions[i];
- if (s->used && s->pid != -1) {
- debug("session_have_children: id %d pid %d", i, s->pid);
- return 1;
- }
- }
- debug("session_have_children: no more children");
- return 0;
-}
-
/*
* this is called when a channel dies before
* the session 'child' itself dies
{
Session *s = session_by_channel(id);
if (s == NULL) {
- debug("session_close_by_channel: no session for channel %d", id);
+ debug("session_close_by_channel: no session for id %d", id);
return;
}
- /* disconnect channel */
+ debug("session_close_by_channel: channel %d child %ld",
+ id, (long)s->pid);
+ if (s->pid != 0) {
+ debug("session_close_by_channel: channel %d: has child", id);
+ /*
+ * delay detach of session, but release pty, since
+ * the fd's to the child are already closed
+ */
+ if (s->ttyfd != -1) {
+ fatal_remove_cleanup(session_pty_cleanup, (void *)s);
+ session_pty_cleanup(s);
+ }
+ return;
+ }
+ /* detach by removing callback */
channel_cancel_cleanup(s->chanid);
s->chanid = -1;
+ session_close(s);
+}
- debug("session_close_by_channel: channel %d kill %d", id, s->pid);
- if (s->pid == 0) {
- /* close session immediately */
- session_close(s);
- } else {
- /* notify child, delay session cleanup */
- if (kill(s->pid, (s->ttyfd == -1) ? SIGTERM : SIGHUP) < 0)
- error("session_close_by_channel: kill %d: %s",
- s->pid, strerror(errno));
+void
+session_destroy_all(void (*closefunc)(Session *))
+{
+ int i;
+ for (i = 0; i < MAX_SESSIONS; i++) {
+ Session *s = &sessions[i];
+ if (s->used) {
+ if (closefunc != NULL)
+ closefunc(s);
+ else
+ session_close(s);
+ }
}
}
{
static char buf[1024];
int i;
+ char *cp;
+
buf[0] = '\0';
- for(i = 0; i < MAX_SESSIONS; i++) {
+ for (i = 0; i < MAX_SESSIONS; i++) {
Session *s = &sessions[i];
if (s->used && s->ttyfd != -1) {
+
+ if (strncmp(s->tty, "/dev/", 5) != 0) {
+ cp = strrchr(s->tty, '/');
+ cp = (cp == NULL) ? s->tty : cp + 1;
+ } else
+ cp = s->tty + 5;
+
if (buf[0] != '\0')
strlcat(buf, ",", sizeof buf);
- strlcat(buf, strrchr(s->tty, '/') + 1, sizeof buf);
+ strlcat(buf, cp, sizeof buf);
}
}
if (buf[0] == '\0')
session_setup_x11fwd(Session *s)
{
struct stat st;
+ char display[512], auth_display[512];
+ char hostname[MAXHOSTNAMELEN];
if (no_x11_forwarding_flag) {
packet_send_debug("X11 forwarding disabled in user configuration file.");
debug("X11 display already set.");
return 0;
}
- s->display = x11_create_display_inet(s->screen, options.x11_display_offset);
- if (s->display == NULL) {
+ if (x11_create_display_inet(options.x11_display_offset,
+ options.x11_use_localhost, s->single_connection,
+ &s->display_number) == -1) {
debug("x11_create_display_inet failed.");
return 0;
}
+
+ /* Set up a suitable value for the DISPLAY variable. */
+ if (gethostname(hostname, sizeof(hostname)) < 0)
+ fatal("gethostname: %.100s", strerror(errno));
+ /*
+ * auth_display must be used as the displayname when the
+ * authorization entry is added with xauth(1). This will be
+ * different than the DISPLAY string for localhost displays.
+ */
+ if (options.x11_use_localhost) {
+ snprintf(display, sizeof display, "localhost:%u.%u",
+ s->display_number, s->screen);
+ snprintf(auth_display, sizeof auth_display, "unix:%u.%u",
+ s->display_number, s->screen);
+ s->display = xstrdup(display);
+ s->auth_display = xstrdup(auth_display);
+ } else {
+#ifdef IPADDR_IN_DISPLAY
+ struct hostent *he;
+ struct in_addr my_addr;
+
+ he = gethostbyname(hostname);
+ if (he == NULL) {
+ error("Can't get IP address for X11 DISPLAY.");
+ packet_send_debug("Can't get IP address for X11 DISPLAY.");
+ return 0;
+ }
+ memcpy(&my_addr, he->h_addr_list[0], sizeof(struct in_addr));
+ snprintf(display, sizeof display, "%.50s:%u.%u", inet_ntoa(my_addr),
+ s->display_number, s->screen);
+#else
+ snprintf(display, sizeof display, "%.400s:%u.%u", hostname,
+ s->display_number, s->screen);
+#endif
+ s->display = xstrdup(display);
+ s->auth_display = xstrdup(display);
+ }
+
return 1;
}
andersk / openssh.git / blobdiff