diff options
Diffstat (limited to 'crypto/openssh/session.c')
| -rw-r--r-- | crypto/openssh/session.c | 472 |
1 files changed, 258 insertions, 214 deletions
diff --git a/crypto/openssh/session.c b/crypto/openssh/session.c index 13525f8..ee51306 100644 --- a/crypto/openssh/session.c +++ b/crypto/openssh/session.c @@ -9,7 +9,7 @@ * called by a name other than "ssh" or "Secure Shell". * * SSH2 support by Markus Friedl. - * Copyright (c) 2000 Markus Friedl. All rights reserved. + * Copyright (c) 2000 Markus Friedl. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions @@ -33,28 +33,30 @@ */ #include "includes.h" -RCSID("$OpenBSD: session.c,v 1.42 2000/10/27 07:32:18 markus Exp $"); +RCSID("$OpenBSD: session.c,v 1.74 2001/04/17 19:34:25 markus Exp $"); -#include "xmalloc.h" #include "ssh.h" -#include "pty.h" +#include "ssh1.h" +#include "ssh2.h" +#include "xmalloc.h" +#include "sshpty.h" #include "packet.h" #include "buffer.h" #include "mpaux.h" -#include "servconf.h" #include "uidswap.h" #include "compat.h" #include "channels.h" #include "nchan.h" - #include "bufaux.h" -#include "ssh2.h" #include "auth.h" #include "auth-options.h" - -#ifdef HAVE_LOGIN_CAP -#include <login_cap.h> -#endif +#include "pathnames.h" +#include "log.h" +#include "servconf.h" +#include "sshlogin.h" +#include "serverloop.h" +#include "canohost.h" +#include "session.h" /* types */ @@ -63,7 +65,6 @@ typedef struct Session Session; struct Session { int used; int self; - int extended; struct passwd *pw; pid_t pid; /* tty */ @@ -79,6 +80,7 @@ struct Session { int single_connection; /* proto 2 */ int chanid; + int is_subsystem; }; /* func */ @@ -87,29 +89,30 @@ Session *session_new(void); void session_set_fds(Session *s, int fdin, int fdout, int fderr); void session_pty_cleanup(Session *s); void session_proctitle(Session *s); -void do_exec_pty(Session *s, const char *command, struct passwd * pw); -void do_exec_no_pty(Session *s, const char *command, struct passwd * pw); +void do_exec_pty(Session *s, const char *command); +void do_exec_no_pty(Session *s, const char *command); void do_login(Session *s, const char *command); +void do_child(Session *s, const char *command); +void do_motd(void); +int check_quietlogin(Session *s, const char *command); -void -do_child(const char *command, struct passwd * pw, const char *term, - const char *display, const char *auth_proto, - const char *auth_data, const char *ttyname); +void do_authenticated1(Authctxt *authctxt); +void do_authenticated2(Authctxt *authctxt); /* import */ extern ServerOptions options; extern char *__progname; extern int log_stderr; extern int debug_flag; -extern unsigned int utmp_len; - +extern u_int utmp_len; extern int startup_pipe; +extern void destroy_sensitive_data(void); /* Local Xauthority file. */ static char *xauthfile; /* original command from peer. */ -char *original_command = NULL; +char *original_command = NULL; /* data */ #define MAX_SESSIONS 10 @@ -119,6 +122,40 @@ Session sessions[MAX_SESSIONS]; static login_cap_t *lc; #endif +void +do_authenticated(Authctxt *authctxt) +{ + /* + * Cancel the alarm we set to limit the time taken for + * authentication. + */ + alarm(0); + if (startup_pipe != -1) { + close(startup_pipe); + startup_pipe = -1; + } +#ifdef HAVE_LOGIN_CAP + 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(); + + if (compat20) + do_authenticated2(authctxt); + else + do_authenticated1(authctxt); +} + /* * Remove local Xauthority file. */ @@ -168,53 +205,23 @@ pty_cleanup_proc(void *session) * are requested, etc. */ void -do_authenticated(struct passwd * pw) +do_authenticated1(Authctxt *authctxt) { Session *s; - int type, fd; - int compression_level = 0, enable_compression_after_reply = 0; - int have_pty = 0; char *command; - int n_bytes; - int plen; - unsigned int proto_len, data_len, dlen; - - /* - * Cancel the alarm we set to limit the time taken for - * authentication. - */ - alarm(0); - if (startup_pipe != -1) { - close(startup_pipe); - startup_pipe = -1; - } - - /* - * Inform the channel mechanism that we are the server side and that - * the client may request to connect to any port at all. (The user - * could do it anyway, and we wouldn\'t know what is permitted except - * by the client telling us, so we can equally well trust the client - * not to request anything bogus.) - */ - if (!no_port_forwarding_flag && options.allow_tcp_forwarding) - channel_permit_all_opens(); + int success, type, fd, n_bytes, plen, screen_flag, have_pty = 0; + int compression_level = 0, enable_compression_after_reply = 0; + u_int proto_len, data_len, dlen; s = session_new(); - s->pw = pw; - -#ifdef HAVE_LOGIN_CAP - if ((lc = login_getclass(pw->pw_class)) == NULL) { - error("unable to get login class"); - return; - } -#endif + s->pw = authctxt->pw; /* * We stay in this loop until the client requests to execute a shell * or a command. */ for (;;) { - int success = 0; + success = 0; /* Get a packet from the client. */ type = packet_read(&plen); @@ -251,7 +258,7 @@ do_authenticated(struct passwd * pw) break; } fatal_add_cleanup(pty_cleanup_proc, (void *)s); - pty_setowner(pw, s->tty); + pty_setowner(s->pw, s->tty); /* Get TERM from the packet. Note that the value may be of arbitrary length. */ s->term = packet_get_string(&dlen); @@ -301,12 +308,23 @@ do_authenticated(struct passwd * pw) s->auth_proto = packet_get_string(&proto_len); s->auth_data = packet_get_string(&data_len); - packet_integrity_check(plen, 4 + proto_len + 4 + data_len + 4, type); - if (packet_get_protocol_flags() & SSH_PROTOFLAG_SCREEN_NUMBER) + screen_flag = packet_get_protocol_flags() & + SSH_PROTOFLAG_SCREEN_NUMBER; + debug2("SSH_PROTOFLAG_SCREEN_NUMBER: %d", screen_flag); + + if (packet_remaining() == 4) { + if (!screen_flag) + debug2("Buggy client: " + "X11 screen flag missing"); + packet_integrity_check(plen, + 4 + proto_len + 4 + data_len + 4, type); s->screen = packet_get_int(); - else + } else { + packet_integrity_check(plen, + 4 + proto_len + 4 + data_len, type); s->screen = 0; + } s->display = x11_create_display_inet(s->screen, options.x11_display_offset); if (s->display == NULL) @@ -315,7 +333,7 @@ do_authenticated(struct passwd * pw) /* Setup to always have a local .Xauthority. */ xauthfile = xmalloc(MAXPATHLEN); strlcpy(xauthfile, "/tmp/ssh-XXXXXXXX", MAXPATHLEN); - temporarily_use_uid(pw->pw_uid); + temporarily_use_uid(s->pw); if (mkdtemp(xauthfile) == NULL) { restore_uid(); error("private X11 dir: mkdtemp %s failed: %s", @@ -340,7 +358,7 @@ do_authenticated(struct passwd * pw) break; } debug("Received authentication agent forwarding request."); - success = auth_input_request_forwarding(pw); + success = auth_input_request_forwarding(s->pw); break; case SSH_CMSG_PORT_FORWARD_REQUEST: @@ -353,7 +371,7 @@ do_authenticated(struct passwd * pw) break; } debug("Received TCP/IP port forwarding request."); - channel_input_port_forward_request(pw->pw_uid == 0, options.gateway_ports); + channel_input_port_forward_request(s->pw->pw_uid == 0, options.gateway_ports); success = 1; break; @@ -364,10 +382,6 @@ do_authenticated(struct passwd * pw) case SSH_CMSG_EXEC_SHELL: case SSH_CMSG_EXEC_CMD: - /* Set interactive/non-interactive mode. */ - packet_set_interactive(have_pty || s->display != NULL, - options.keepalives); - if (type == SSH_CMSG_EXEC_CMD) { command = packet_get_string(&dlen); debug("Exec command '%.500s'", command); @@ -382,9 +396,9 @@ do_authenticated(struct passwd * pw) debug("Forced command '%.500s'", forced_command); } if (have_pty) - do_exec_pty(s, command, pw); + do_exec_pty(s, command); else - do_exec_no_pty(s, command, pw); + do_exec_no_pty(s, command); if (command != NULL) xfree(command); @@ -418,7 +432,7 @@ do_authenticated(struct passwd * pw) * setting up file descriptors and such. */ void -do_exec_no_pty(Session *s, const char *command, struct passwd * pw) +do_exec_no_pty(Session *s, const char *command) { int pid; @@ -491,12 +505,14 @@ do_exec_no_pty(Session *s, const char *command, struct passwd * pw) #endif /* USE_PIPES */ /* Do processing for the child (exec command etc). */ - do_child(command, pw, NULL, s->display, s->auth_proto, s->auth_data, NULL); + do_child(s, command); /* NOTREACHED */ } if (pid < 0) packet_disconnect("fork failed: %.100s", strerror(errno)); s->pid = pid; + /* Set interactive/non-interactive mode. */ + packet_set_interactive(s->display != NULL); #ifdef USE_PIPES /* We are the parent. Close the child sides of the pipes. */ close(pin[0]); @@ -504,11 +520,11 @@ do_exec_no_pty(Session *s, const char *command, struct passwd * pw) close(perr[1]); if (compat20) { - session_set_fds(s, pin[1], pout[0], s->extended ? perr[0] : -1); + session_set_fds(s, pin[1], pout[0], s->is_subsystem ? -1 : perr[0]); } else { /* Enter the interactive session. */ server_loop(pid, pin[1], pout[0], perr[0]); - /* server_loop has closed pin[1], pout[1], and perr[1]. */ + /* server_loop has closed pin[1], pout[0], and perr[0]. */ } #else /* USE_PIPES */ /* We are the parent. Close the child sides of the socket pairs. */ @@ -520,7 +536,7 @@ do_exec_no_pty(Session *s, const char *command, struct passwd * pw) * handle the case that fdin and fdout are the same. */ if (compat20) { - session_set_fds(s, inout[1], inout[1], s->extended ? err[1] : -1); + session_set_fds(s, inout[1], inout[1], s->is_subsystem ? -1 : err[1]); } else { server_loop(pid, inout[1], inout[1], err[1]); /* server_loop has closed inout[1] and err[1]. */ @@ -535,7 +551,7 @@ do_exec_no_pty(Session *s, const char *command, struct passwd * pw) * lastlog, and other such operations. */ void -do_exec_pty(Session *s, const char *command, struct passwd * pw) +do_exec_pty(Session *s, const char *command) { int fdout, ptyfd, ttyfd, ptymaster; pid_t pid; @@ -576,8 +592,7 @@ do_exec_pty(Session *s, const char *command, struct passwd * pw) do_login(s, command); /* Do common processing for the child, such as execing the command. */ - do_child(command, pw, s->term, s->display, s->auth_proto, - s->auth_data, s->tty); + do_child(s, command); /* NOTREACHED */ } if (pid < 0) @@ -603,6 +618,7 @@ do_exec_pty(Session *s, const char *command, struct passwd * pw) s->ptymaster = ptymaster; /* Enter interactive session. */ + packet_set_interactive(1); if (compat20) { session_set_fds(s, ptyfd, fdout, -1); } else { @@ -612,28 +628,14 @@ do_exec_pty(Session *s, const char *command, struct passwd * pw) } } -const char * -get_remote_name_or_ip(void) -{ - static const char *remote = ""; - if (utmp_len > 0) - remote = get_canonical_hostname(); - if (utmp_len == 0 || strlen(remote) > utmp_len) - remote = get_remote_ipaddr(); - return remote; -} - /* administrative, login(1)-like work */ void do_login(Session *s, const char *command) { - FILE *f; char *time_string; - char buf[256]; char hostname[MAXHOSTNAMELEN]; socklen_t fromlen; struct sockaddr_storage from; - struct stat st; time_t last_login_time; struct passwd * pw = s->pw; pid_t pid = getpid(); @@ -653,25 +655,21 @@ do_login(Session *s, const char *command) } /* Get the time and hostname when the user last logged in. */ - hostname[0] = '\0'; - last_login_time = get_last_login_time(pw->pw_uid, pw->pw_name, - hostname, sizeof(hostname)); + 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(), (struct sockaddr *)&from); + get_remote_name_or_ip(utmp_len, options.reverse_mapping_check), + (struct sockaddr *)&from); - /* Done if .hushlogin exists or a command given. */ - if (command != NULL) + if (check_quietlogin(s, command)) return; - snprintf(buf, sizeof(buf), "%.200s/.hushlogin", pw->pw_dir); -#ifdef HAVE_LOGIN_CAP - if (login_getcapbool(lc, "hushlogin", 0) || stat(buf, &st) >= 0) -#else - if (stat(buf, &st) >= 0) -#endif - return; - if (last_login_time != 0) { + + if (options.print_lastlog && last_login_time != 0) { time_string = ctime(&last_login_time); if (strchr(time_string, '\n')) *strchr(time_string, '\n') = 0; @@ -680,6 +678,19 @@ do_login(Session *s, const char *command) else printf("Last login: %s from %s\r\n", time_string, hostname); } + + do_motd(); +} + +/* + * Display the message of the day. + */ +void +do_motd(void) +{ + FILE *f; + char buf[256]; + if (options.print_motd) { #ifdef HAVE_LOGIN_CAP f = fopen(login_getcapstr(lc, "welcome", "/etc/motd", @@ -695,15 +706,40 @@ do_login(Session *s, const char *command) } } + +/* + * 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. */ void -child_set_env(char ***envp, unsigned int *envsizep, const char *name, +child_set_env(char ***envp, u_int *envsizep, const char *name, const char *value) { - unsigned int i, namelen; + u_int i, namelen; char **env; /* @@ -741,7 +777,7 @@ child_set_env(char ***envp, unsigned int *envsizep, const char *name, * and assignments of the form name=value. No other forms are allowed. */ void -read_environment_file(char ***env, unsigned int *envsize, +read_environment_file(char ***env, u_int *envsize, const char *filename) { FILE *f; @@ -781,19 +817,22 @@ read_environment_file(char ***env, unsigned int *envsize, * ids, and executing the command or shell. */ void -do_child(const char *command, struct passwd * pw, const char *term, - const char *display, const char *auth_proto, - const char *auth_data, const char *ttyname) +do_child(Session *s, const char *command) { const char *shell, *hostname = NULL, *cp = NULL; + struct passwd * pw = s->pw; char buf[256]; char cmd[1024]; FILE *f = NULL; - unsigned int envsize, i; + u_int envsize, i; char **env; extern char **environ; struct stat st; char *argv[10]; + int do_xauth = 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) @@ -826,7 +865,6 @@ do_child(const char *command, struct passwd * pw, const char *term, (LOGIN_SETALL & ~LOGIN_SETPATH)) < 0) { perror("unable to set user context"); exit(1); - } #else if (setlogin(pw->pw_name) < 0) @@ -843,7 +881,7 @@ do_child(const char *command, struct passwd * pw, const char *term, endgrent(); /* Permanently switch to the desired uid. */ - permanently_set_uid(pw->pw_uid); + permanently_set_uid(pw); #endif } if (getuid() != pw->pw_uid || geteuid() != pw->pw_uid) @@ -916,12 +954,12 @@ do_child(const char *command, struct passwd * pw, const char *term, get_remote_ipaddr(), get_remote_port(), get_local_port()); child_set_env(&env, &envsize, "SSH_CLIENT", buf); - if (ttyname) - child_set_env(&env, &envsize, "SSH_TTY", ttyname); - if (term) - child_set_env(&env, &envsize, "TERM", term); - if (display) - child_set_env(&env, &envsize, "DISPLAY", display); + if (s->ttyfd != -1) + child_set_env(&env, &envsize, "SSH_TTY", s->tty); + if (s->term) + child_set_env(&env, &envsize, "TERM", s->term); + if (s->display) + child_set_env(&env, &envsize, "DISPLAY", s->display); if (original_command) child_set_env(&env, &envsize, "SSH_ORIGINAL_COMMAND", original_command); @@ -955,7 +993,8 @@ do_child(const char *command, struct passwd * pw, const char *term, } /* we have to stash the hostname before we close our socket. */ if (options.use_login) - hostname = get_remote_name_or_ip(); + hostname = get_remote_name_or_ip(utmp_len, + options.reverse_mapping_check); /* * Close the connection descriptors; note that this is the child, and * the server will still have the socket open, and it is important @@ -1012,58 +1051,66 @@ do_child(const char *command, struct passwd * pw, const char *term, * in this order). */ if (!options.use_login) { - if (stat(SSH_USER_RC, &st) >= 0) { + /* ignore _PATH_SSH_USER_RC for subsystems */ + if (!s->is_subsystem && (stat(_PATH_SSH_USER_RC, &st) >= 0)) { if (debug_flag) - fprintf(stderr, "Running /bin/sh %s\n", SSH_USER_RC); - - f = popen("/bin/sh " SSH_USER_RC, "w"); + fprintf(stderr, "Running %s %s\n", _PATH_BSHELL, + _PATH_SSH_USER_RC); + f = popen(_PATH_BSHELL " " _PATH_SSH_USER_RC, "w"); if (f) { - if (auth_proto != NULL && auth_data != NULL) - fprintf(f, "%s %s\n", auth_proto, auth_data); + if (do_xauth) + fprintf(f, "%s %s\n", s->auth_proto, + s->auth_data); pclose(f); } else - fprintf(stderr, "Could not run %s\n", SSH_USER_RC); - } else if (stat(SSH_SYSTEM_RC, &st) >= 0) { + 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 /bin/sh %s\n", SSH_SYSTEM_RC); - - f = popen("/bin/sh " SSH_SYSTEM_RC, "w"); + fprintf(stderr, "Running %s %s\n", _PATH_BSHELL, + _PATH_SSH_SYSTEM_RC); + f = popen(_PATH_BSHELL " " _PATH_SSH_SYSTEM_RC, "w"); if (f) { - if (auth_proto != NULL && auth_data != NULL) - fprintf(f, "%s %s\n", auth_proto, auth_data); + if (do_xauth) + fprintf(f, "%s %s\n", s->auth_proto, + s->auth_data); pclose(f); } else - fprintf(stderr, "Could not run %s\n", SSH_SYSTEM_RC); - } else if (options.xauth_location != NULL) { + 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 (auth_proto != NULL && auth_data != NULL) { - char *screen = strchr(display, ':'); - if (debug_flag) { + 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, - "Running %.100s add %.100s %.100s %.100s\n", - options.xauth_location, display, - auth_proto, auth_data); - if (screen != NULL) - fprintf(stderr, - "Adding %.*s/unix%s %s %s\n", - (int)(screen-display), display, - screen, auth_proto, auth_data); - } - snprintf(cmd, sizeof cmd, "%s -q -", - options.xauth_location); - f = popen(cmd, "w"); - if (f) { - fprintf(f, "add %s %s %s\n", display, - auth_proto, auth_data); - if (screen != NULL) - fprintf(f, "add %.*s/unix%s %s %s\n", - (int)(screen-display), display, - screen, auth_proto, auth_data); - pclose(f); - } else { - fprintf(stderr, "Could not run %s\n", - cmd); - } + "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. */ @@ -1073,6 +1120,10 @@ do_child(const char *command, struct passwd * pw, const char *term, else cp = shell; } + + /* restore SIGPIPE for child */ + signal(SIGPIPE, SIG_DFL); + /* * 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 @@ -1086,9 +1137,10 @@ do_child(const char *command, struct passwd * pw, const char *term, * Check for mail if we have a tty and it was enabled * in server options. */ - if (ttyname && options.check_mail) { + if (s->ttyfd != -1 && options.check_mail) { char *mailbox; struct stat mailstat; + mailbox = getenv("MAIL"); if (mailbox != NULL) { if (stat(mailbox, &mailstat) != 0 || @@ -1155,19 +1207,11 @@ session_new(void) for(i = 0; i < MAX_SESSIONS; i++) { Session *s = &sessions[i]; if (! s->used) { - s->pid = 0; - s->extended = 0; + memset(s, 0, sizeof(*s)); s->chanid = -1; s->ptyfd = -1; s->ttyfd = -1; - s->term = NULL; - s->pw = NULL; - s->display = NULL; - s->screen = 0; - s->auth_data = NULL; - s->auth_proto = NULL; s->used = 1; - s->pw = NULL; debug("session_new: session %d", i); return s; } @@ -1201,7 +1245,7 @@ session_open(int chanid) } s->pw = auth_get_user(); if (s->pw == NULL) - fatal("no user for session %i", s->self); + fatal("no user for session %d", s->self); debug("session_open: session %d: link with channel %d", s->self, chanid); s->chanid = chanid; return 1; @@ -1253,8 +1297,8 @@ session_window_change_req(Session *s) int session_pty_req(Session *s) { - unsigned int len; - char *term_modes; /* encoded terminal modes */ + u_int len; + int n_bytes; if (no_pty_flag) return 0; @@ -1265,8 +1309,6 @@ session_pty_req(Session *s) s->row = packet_get_int(); s->xpixel = packet_get_int(); s->ypixel = packet_get_int(); - term_modes = packet_get_string(&len); - packet_done(); if (strcmp(s->term, "") == 0) { xfree(s->term); @@ -1279,7 +1321,6 @@ session_pty_req(Session *s) s->ptyfd = -1; s->ttyfd = -1; error("session_pty_req: session %d alloc failed", s->self); - xfree(term_modes); return 0; } debug("session_pty_req: session %d alloc %s", s->self, s->tty); @@ -1292,17 +1333,19 @@ session_pty_req(Session *s) /* Get window size from the packet. */ pty_change_window_size(s->ptyfd, s->row, s->col, s->xpixel, s->ypixel); + /* Get tty modes from the packet. */ + tty_parse_modes(s->ttyfd, &n_bytes); + packet_done(); + session_proctitle(s); - /* XXX parse and set terminal modes */ - xfree(term_modes); return 1; } int session_subsystem_req(Session *s) { - unsigned int len; + u_int len; int success = 0; char *subsys = packet_get_string(&len); int i; @@ -1313,7 +1356,8 @@ session_subsystem_req(Session *s) for (i = 0; i < options.num_subsystems; i++) { if(strcmp(subsys, options.subsystem_name[i]) == 0) { debug("subsystem: exec() %s", options.subsystem_command[i]); - do_exec_no_pty(s, options.subsystem_command[i], s->pw); + s->is_subsystem = 1; + do_exec_no_pty(s, options.subsystem_command[i]); success = 1; } } @@ -1360,7 +1404,7 @@ session_x11_req(Session *s) } xauthfile = xmalloc(MAXPATHLEN); strlcpy(xauthfile, "/tmp/ssh-XXXXXXXX", MAXPATHLEN); - temporarily_use_uid(s->pw->pw_uid); + temporarily_use_uid(s->pw); if (mkdtemp(xauthfile) == NULL) { restore_uid(); error("private X11 dir: mkdtemp %s failed: %s", @@ -1387,18 +1431,17 @@ session_shell_req(Session *s) /* if forced_command == NULL, the shell is execed */ char *shell = forced_command; packet_done(); - s->extended = 1; if (s->ttyfd == -1) - do_exec_no_pty(s, shell, s->pw); + do_exec_no_pty(s, shell); else - do_exec_pty(s, shell, s->pw); + do_exec_pty(s, shell); return 1; } int session_exec_req(Session *s) { - unsigned int len; + u_int len; char *command = packet_get_string(&len); packet_done(); if (forced_command) { @@ -1406,20 +1449,36 @@ session_exec_req(Session *s) command = forced_command; debug("Forced command '%.500s'", forced_command); } - s->extended = 1; if (s->ttyfd == -1) - do_exec_no_pty(s, command, s->pw); + do_exec_no_pty(s, command); else - do_exec_pty(s, command, s->pw); + do_exec_pty(s, command); if (forced_command == NULL) xfree(command); return 1; } +int +session_auth_agent_req(Session *s) +{ + static int called = 0; + packet_done(); + if (no_agent_forwarding_flag) { + debug("session_auth_agent_req: no_agent_forwarding_flag"); + return 0; + } + if (called) { + return 0; + } else { + called = 1; + return auth_input_request_forwarding(s->pw); + } +} + void session_input_channel_req(int id, void *arg) { - unsigned int len; + u_int len; int reply; int success = 0; char *rtype; @@ -1440,8 +1499,8 @@ session_input_channel_req(int id, void *arg) s->self, id, rtype, reply); /* - * a session is in LARVAL state until a shell - * or programm is executed + * a session is in LARVAL state until a shell, a command + * or a subsystem is executed */ if (c->type == SSH_CHANNEL_LARVAL) { if (strcmp(rtype, "shell") == 0) { @@ -1452,6 +1511,8 @@ session_input_channel_req(int id, void *arg) success = session_pty_req(s); } else if (strcmp(rtype, "x11-req") == 0) { success = session_x11_req(s); + } else if (strcmp(rtype, "auth-agent-req@openssh.com") == 0) { + success = session_auth_agent_req(s); } else if (strcmp(rtype, "subsystem") == 0) { success = session_subsystem_req(s); } @@ -1492,7 +1553,7 @@ session_pty_cleanup(Session *s) if (s == NULL || s->ttyfd == -1) return; - debug("session_pty_cleanup: session %i release %s", s->self, s->tty); + debug("session_pty_cleanup: session %d release %s", s->self, s->tty); /* Cancel the cleanup function. */ fatal_remove_cleanup(pty_cleanup_proc, (void *)s); @@ -1650,26 +1711,9 @@ session_proctitle(Session *s) } void -do_authenticated2(void) +do_authenticated2(Authctxt *authctxt) { - struct passwd *pw; - /* - * Cancel the alarm we set to limit the time taken for - * authentication. - */ - alarm(0); - if (startup_pipe != -1) { - close(startup_pipe); - startup_pipe = -1; - } -#ifdef HAVE_LOGIN_CAP - pw = auth_get_user(); - if ((lc = login_getclass(pw->pw_class)) == NULL) { - error("unable to get login class"); - return; - } -#endif server_loop2(); if (xauthfile) xauthfile_cleanup_proc(NULL); |
