11305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood/* $OpenBSD: sshconnect.c,v 1.234 2011/05/24 07:15:47 djm Exp $ */ 21305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood/* 31305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood * Author: Tatu Ylonen <ylo@cs.hut.fi> 41305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland 51305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood * All rights reserved 61305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood * Code to connect to a remote host, and to perform the client side of the 71305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood * login (authentication) dialog. 81305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood * 91305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood * As far as I am concerned, the code I have written for this software 101305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood * can be used freely for any purpose. Any derived versions of this 111305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood * software must be clearly marked as such, and if the derived work is 121305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood * incompatible with the protocol description in the RFC file, it must be 131305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood * called by a name other than "ssh" or "Secure Shell". 141305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood */ 151305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood 161305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood#include "includes.h" 171305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood 181305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood#include <sys/types.h> 191305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood#include <sys/wait.h> 201305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood#include <sys/stat.h> 211305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood#include <sys/socket.h> 221305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood#ifdef HAVE_SYS_TIME_H 231305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood# include <sys/time.h> 241305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood#endif 251305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood 261305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood#include <netinet/in.h> 271305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood#include <arpa/inet.h> 281305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood 291305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood#include <ctype.h> 301305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood#include <errno.h> 311305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood#include <fcntl.h> 321305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood#include <netdb.h> 331305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood#ifdef HAVE_PATHS_H 341305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood#include <paths.h> 351305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood#endif 361305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood#include <pwd.h> 371305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood#include <signal.h> 381305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood#include <stdarg.h> 391305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood#include <stdio.h> 401305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood#include <stdlib.h> 411305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood#include <string.h> 421305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood#include <unistd.h> 431305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood 441305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood#include "xmalloc.h" 451305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood#include "key.h" 461305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood#include "hostfile.h" 471305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood#include "ssh.h" 481305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood#include "rsa.h" 491305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood#include "buffer.h" 501305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood#include "packet.h" 511305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood#include "uidswap.h" 521305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood#include "compat.h" 531305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood#include "key.h" 541305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood#include "sshconnect.h" 551305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood#include "hostfile.h" 561305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood#include "log.h" 571305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood#include "readconf.h" 581305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood#include "atomicio.h" 591305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood#include "misc.h" 601305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood#include "dns.h" 611305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood#include "roaming.h" 621305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood#include "ssh2.h" 631305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood#include "version.h" 641305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood 651305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwoodchar *client_version_string = NULL; 661305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwoodchar *server_version_string = NULL; 671305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood 681305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwoodstatic int matching_host_key_dns = 0; 691305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood 701305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwoodstatic pid_t proxy_command_pid = 0; 711305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood 721305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood/* import */ 731305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwoodextern Options options; 741305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwoodextern char *__progname; 751305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwoodextern uid_t original_real_uid; 761305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwoodextern uid_t original_effective_uid; 771305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood 781305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwoodstatic int show_other_keys(struct hostkeys *, Key *); 791305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwoodstatic void warn_changed_key(Key *); 801305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood 811305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood/* 821305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood * Connect to the given ssh server using a proxy command. 831305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood */ 841305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwoodstatic int 851305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwoodssh_proxy_connect(const char *host, u_short port, const char *proxy_command) 861305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood{ 871305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood char *command_string, *tmp; 881305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood int pin[2], pout[2]; 891305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood pid_t pid; 901305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood char *shell, strport[NI_MAXSERV]; 911305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood 921305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood if ((shell = getenv("SHELL")) == NULL || *shell == '\0') 931305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood shell = _PATH_BSHELL; 941305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood 951305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood /* Convert the port number into a string. */ 961305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood snprintf(strport, sizeof strport, "%hu", port); 971305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood 981305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood /* 991305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood * Build the final command string in the buffer by making the 1001305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood * appropriate substitutions to the given proxy command. 1011305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood * 1021305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood * Use "exec" to avoid "sh -c" processes on some platforms 1031305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood * (e.g. Solaris) 1041305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood */ 1051305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood xasprintf(&tmp, "exec %s", proxy_command); 1061305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood command_string = percent_expand(tmp, "h", host, "p", strport, 1071305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood "r", options.user, (char *)NULL); 1081305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood xfree(tmp); 1091305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood 1101305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood /* Create pipes for communicating with the proxy. */ 1111305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood if (pipe(pin) < 0 || pipe(pout) < 0) 1121305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood fatal("Could not create pipes to communicate with the proxy: %.100s", 1131305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood strerror(errno)); 1141305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood 1151305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood debug("Executing proxy command: %.500s", command_string); 1161305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood 1171305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood /* Fork and execute the proxy command. */ 1181305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood if ((pid = fork()) == 0) { 1191305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood char *argv[10]; 1201305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood 1211305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood /* Child. Permanently give up superuser privileges. */ 1221305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood permanently_drop_suid(original_real_uid); 1231305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood 1241305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood /* Redirect stdin and stdout. */ 1251305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood close(pin[1]); 1261305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood if (pin[0] != 0) { 1271305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood if (dup2(pin[0], 0) < 0) 1281305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood perror("dup2 stdin"); 1291305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood close(pin[0]); 1301305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood } 1311305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood close(pout[0]); 1321305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood if (dup2(pout[1], 1) < 0) 1331305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood perror("dup2 stdout"); 1341305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood /* Cannot be 1 because pin allocated two descriptors. */ 1351305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood close(pout[1]); 1361305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood 1371305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood /* Stderr is left as it is so that error messages get 1381305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood printed on the user's terminal. */ 1391305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood argv[0] = shell; 1401305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood argv[1] = "-c"; 1411305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood argv[2] = command_string; 1421305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood argv[3] = NULL; 1431305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood 1441305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood /* Execute the proxy command. Note that we gave up any 1451305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood extra privileges above. */ 1461305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood signal(SIGPIPE, SIG_DFL); 1471305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood execv(argv[0], argv); 1481305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood perror(argv[0]); 1491305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood exit(1); 1501305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood } 1511305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood /* Parent. */ 1521305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood if (pid < 0) 1531305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood fatal("fork failed: %.100s", strerror(errno)); 1541305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood else 1551305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood proxy_command_pid = pid; /* save pid to clean up later */ 1561305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood 1571305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood /* Close child side of the descriptors. */ 1581305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood close(pin[0]); 1591305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood close(pout[1]); 1601305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood 1611305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood /* Free the command name. */ 1621305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood xfree(command_string); 1631305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood 1641305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood /* Set the connection file descriptors. */ 1651305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood packet_set_connection(pout[0], pin[1]); 1661305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood packet_set_timeout(options.server_alive_interval, 1671305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood options.server_alive_count_max); 1681305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood 1691305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood /* Indicate OK return */ 1701305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood return 0; 1711305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood} 1721305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood 1731305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwoodvoid 1741305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwoodssh_kill_proxy_command(void) 1751305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood{ 1761305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood /* 1771305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood * Send SIGHUP to proxy command if used. We don't wait() in 1781305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood * case it hangs and instead rely on init to reap the child 1791305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood */ 1801305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood if (proxy_command_pid > 1) 1811305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood kill(proxy_command_pid, SIGHUP); 1821305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood} 1831305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood 1841305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood/* 1851305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood * Creates a (possibly privileged) socket for use as the ssh connection. 1861305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood */ 1871305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwoodstatic int 1881305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwoodssh_create_socket(int privileged, struct addrinfo *ai) 1891305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood{ 1901305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood int sock, gaierr; 1911305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood struct addrinfo hints, *res; 1921305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood 1931305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood /* 1941305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood * If we are running as root and want to connect to a privileged 1951305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood * port, bind our own socket to a privileged port. 1961305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood */ 1971305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood if (privileged) { 1981305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood int p = IPPORT_RESERVED - 1; 1991305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood PRIV_START; 2001305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood sock = rresvport_af(&p, ai->ai_family); 2011305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood PRIV_END; 2021305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood if (sock < 0) 2031305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood error("rresvport: af=%d %.100s", ai->ai_family, 2041305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood strerror(errno)); 2051305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood else 2061305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood debug("Allocated local port %d.", p); 2071305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood return sock; 2081305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood } 2091305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood sock = socket(ai->ai_family, ai->ai_socktype, ai->ai_protocol); 2101305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood if (sock < 0) { 2111305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood error("socket: %.100s", strerror(errno)); 2121305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood return -1; 2131305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood } 2141305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood fcntl(sock, F_SETFD, FD_CLOEXEC); 2151305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood 2161305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood /* Bind the socket to an alternative local IP address */ 2171305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood if (options.bind_address == NULL) 2181305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood return sock; 2191305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood 2201305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood memset(&hints, 0, sizeof(hints)); 2211305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood hints.ai_family = ai->ai_family; 2221305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood hints.ai_socktype = ai->ai_socktype; 2231305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood hints.ai_protocol = ai->ai_protocol; 2241305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood hints.ai_flags = AI_PASSIVE; 2251305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood gaierr = getaddrinfo(options.bind_address, NULL, &hints, &res); 2261305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood if (gaierr) { 2271305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood error("getaddrinfo: %s: %s", options.bind_address, 2281305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood ssh_gai_strerror(gaierr)); 2291305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood close(sock); 2301305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood return -1; 2311305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood } 2321305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood if (bind(sock, res->ai_addr, res->ai_addrlen) < 0) { 2331305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood error("bind: %s: %s", options.bind_address, strerror(errno)); 2341305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood close(sock); 2351305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood freeaddrinfo(res); 2361305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood return -1; 2371305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood } 2381305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood freeaddrinfo(res); 2391305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood return sock; 2401305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood} 2411305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood 2421305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwoodstatic int 2431305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwoodtimeout_connect(int sockfd, const struct sockaddr *serv_addr, 2441305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood socklen_t addrlen, int *timeoutp) 2451305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood{ 2461305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood fd_set *fdset; 2471305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood struct timeval tv, t_start; 2481305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood socklen_t optlen; 2491305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood int optval, rc, result = -1; 2501305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood 2511305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood gettimeofday(&t_start, NULL); 2521305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood 2531305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood if (*timeoutp <= 0) { 2541305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood result = connect(sockfd, serv_addr, addrlen); 2551305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood goto done; 2561305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood } 2571305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood 2581305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood set_nonblock(sockfd); 2591305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood rc = connect(sockfd, serv_addr, addrlen); 2601305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood if (rc == 0) { 2611305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood unset_nonblock(sockfd); 2621305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood result = 0; 2631305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood goto done; 2641305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood } 2651305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood if (errno != EINPROGRESS) { 2661305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood result = -1; 2671305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood goto done; 2681305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood } 2691305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood 2701305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood fdset = (fd_set *)xcalloc(howmany(sockfd + 1, NFDBITS), 2711305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood sizeof(fd_mask)); 2721305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood FD_SET(sockfd, fdset); 2731305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood ms_to_timeval(&tv, *timeoutp); 2741305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood 2751305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood for (;;) { 2761305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood rc = select(sockfd + 1, NULL, fdset, NULL, &tv); 2771305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood if (rc != -1 || errno != EINTR) 2781305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood break; 2791305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood } 2801305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood 2811305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood switch (rc) { 2821305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood case 0: 2831305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood /* Timed out */ 2841305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood errno = ETIMEDOUT; 2851305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood break; 2861305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood case -1: 2871305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood /* Select error */ 2881305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood debug("select: %s", strerror(errno)); 2891305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood break; 2901305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood case 1: 2911305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood /* Completed or failed */ 2921305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood optval = 0; 2931305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood optlen = sizeof(optval); 2941305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood if (getsockopt(sockfd, SOL_SOCKET, SO_ERROR, &optval, 2951305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood &optlen) == -1) { 2961305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood debug("getsockopt: %s", strerror(errno)); 2971305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood break; 2981305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood } 2991305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood if (optval != 0) { 3001305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood errno = optval; 3011305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood break; 3021305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood } 3031305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood result = 0; 3041305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood unset_nonblock(sockfd); 3051305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood break; 3061305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood default: 3071305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood /* Should not occur */ 3081305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood fatal("Bogus return (%d) from select()", rc); 3091305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood } 3101305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood 3111305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood xfree(fdset); 3121305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood 3131305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood done: 3141305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood if (result == 0 && *timeoutp > 0) { 3151305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood ms_subtract_diff(&t_start, timeoutp); 3161305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood if (*timeoutp <= 0) { 3171305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood errno = ETIMEDOUT; 3181305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood result = -1; 3191305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood } 3201305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood } 3211305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood 3221305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood return (result); 3231305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood} 3241305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood 3251305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood/* 3261305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood * Opens a TCP/IP connection to the remote server on the given host. 3271305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood * The address of the remote host will be returned in hostaddr. 3281305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood * If port is 0, the default port will be used. If needpriv is true, 3291305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood * a privileged port will be allocated to make the connection. 3301305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood * This requires super-user privileges if needpriv is true. 3311305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood * Connection_attempts specifies the maximum number of tries (one per 3321305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood * second). If proxy_command is non-NULL, it specifies the command (with %h 3331305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood * and %p substituted for host and port, respectively) to use to contact 3341305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood * the daemon. 3351305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood */ 3361305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwoodint 3371305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwoodssh_connect(const char *host, struct sockaddr_storage * hostaddr, 3381305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood u_short port, int family, int connection_attempts, int *timeout_ms, 3391305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood int want_keepalive, int needpriv, const char *proxy_command) 3401305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood{ 3411305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood int gaierr; 3421305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood int on = 1; 3431305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood int sock = -1, attempt; 3441305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood char ntop[NI_MAXHOST], strport[NI_MAXSERV]; 3451305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood struct addrinfo hints, *ai, *aitop; 3461305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood 3471305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood debug2("ssh_connect: needpriv %d", needpriv); 3481305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood 3491305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood /* If a proxy command is given, connect using it. */ 3501305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood if (proxy_command != NULL) 3511305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood return ssh_proxy_connect(host, port, proxy_command); 3521305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood 3531305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood /* No proxy command. */ 3541305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood 3551305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood memset(&hints, 0, sizeof(hints)); 3561305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood hints.ai_family = family; 3571305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood hints.ai_socktype = SOCK_STREAM; 3581305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood snprintf(strport, sizeof strport, "%u", port); 3591305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood if ((gaierr = getaddrinfo(host, strport, &hints, &aitop)) != 0) 3601305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood fatal("%s: Could not resolve hostname %.100s: %s", __progname, 3611305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood host, ssh_gai_strerror(gaierr)); 3621305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood 3631305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood for (attempt = 0; attempt < connection_attempts; attempt++) { 3641305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood if (attempt > 0) { 3651305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood /* Sleep a moment before retrying. */ 3661305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood sleep(1); 3671305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood debug("Trying again..."); 3681305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood } 3691305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood /* 3701305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood * Loop through addresses for this host, and try each one in 3711305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood * sequence until the connection succeeds. 3721305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood */ 3731305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood for (ai = aitop; ai; ai = ai->ai_next) { 3741305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood if (ai->ai_family != AF_INET && ai->ai_family != AF_INET6) 3751305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood continue; 3761305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood if (getnameinfo(ai->ai_addr, ai->ai_addrlen, 3771305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood ntop, sizeof(ntop), strport, sizeof(strport), 3781305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood NI_NUMERICHOST|NI_NUMERICSERV) != 0) { 3791305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood error("ssh_connect: getnameinfo failed"); 3801305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood continue; 3811305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood } 3821305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood debug("Connecting to %.200s [%.100s] port %s.", 3831305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood host, ntop, strport); 3841305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood 3851305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood /* Create a socket for connecting. */ 3861305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood sock = ssh_create_socket(needpriv, ai); 3871305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood if (sock < 0) 3881305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood /* Any error is already output */ 3891305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood continue; 3901305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood 3911305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood if (timeout_connect(sock, ai->ai_addr, ai->ai_addrlen, 3921305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood timeout_ms) >= 0) { 3931305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood /* Successful connection. */ 3941305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood memcpy(hostaddr, ai->ai_addr, ai->ai_addrlen); 3951305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood break; 3961305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood } else { 3971305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood debug("connect to address %s port %s: %s", 3981305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood ntop, strport, strerror(errno)); 3991305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood close(sock); 4001305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood sock = -1; 4011305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood } 4021305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood } 4031305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood if (sock != -1) 4041305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood break; /* Successful connection. */ 4051305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood } 4061305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood 4071305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood freeaddrinfo(aitop); 4081305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood 4091305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood /* Return failure if we didn't get a successful connection. */ 4101305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood if (sock == -1) { 4111305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood error("ssh: connect to host %s port %s: %s", 4121305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood host, strport, strerror(errno)); 4131305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood return (-1); 4141305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood } 4151305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood 4161305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood debug("Connection established."); 4171305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood 4181305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood /* Set SO_KEEPALIVE if requested. */ 4191305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood if (want_keepalive && 4201305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood setsockopt(sock, SOL_SOCKET, SO_KEEPALIVE, (void *)&on, 4211305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood sizeof(on)) < 0) 4221305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood error("setsockopt SO_KEEPALIVE: %.100s", strerror(errno)); 4231305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood 4241305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood /* Set the connection. */ 4251305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood packet_set_connection(sock, sock); 4261305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood packet_set_timeout(options.server_alive_interval, 4271305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood options.server_alive_count_max); 4281305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood 4291305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood return 0; 4301305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood} 4311305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood 4321305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood/* 4331305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood * Waits for the server identification string, and sends our own 4341305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood * identification string. 4351305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood */ 4361305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwoodvoid 4371305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwoodssh_exchange_identification(int timeout_ms) 4381305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood{ 4391305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood char buf[256], remote_version[256]; /* must be same size! */ 4401305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood int remote_major, remote_minor, mismatch; 4411305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood int connection_in = packet_get_connection_in(); 4421305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood int connection_out = packet_get_connection_out(); 4431305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood int minor1 = PROTOCOL_MINOR_1; 4441305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood u_int i, n; 4451305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood size_t len; 4461305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood int fdsetsz, remaining, rc; 4471305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood struct timeval t_start, t_remaining; 4481305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood fd_set *fdset; 4491305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood 4501305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood fdsetsz = howmany(connection_in + 1, NFDBITS) * sizeof(fd_mask); 4511305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood fdset = xcalloc(1, fdsetsz); 4521305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood 4531305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood /* Read other side's version identification. */ 4541305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood remaining = timeout_ms; 4551305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood for (n = 0;;) { 4561305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood for (i = 0; i < sizeof(buf) - 1; i++) { 4571305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood if (timeout_ms > 0) { 4581305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood gettimeofday(&t_start, NULL); 4591305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood ms_to_timeval(&t_remaining, remaining); 4601305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood FD_SET(connection_in, fdset); 4611305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood rc = select(connection_in + 1, fdset, NULL, 4621305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood fdset, &t_remaining); 4631305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood ms_subtract_diff(&t_start, &remaining); 4641305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood if (rc == 0 || remaining <= 0) 4651305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood fatal("Connection timed out during " 4661305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood "banner exchange"); 4671305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood if (rc == -1) { 4681305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood if (errno == EINTR) 4691305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood continue; 4701305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood fatal("ssh_exchange_identification: " 4711305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood "select: %s", strerror(errno)); 4721305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood } 4731305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood } 4741305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood 4751305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood len = roaming_atomicio(read, connection_in, &buf[i], 1); 4761305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood 4771305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood if (len != 1 && errno == EPIPE) 4781305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood fatal("ssh_exchange_identification: " 4791305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood "Connection closed by remote host"); 4801305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood else if (len != 1) 4811305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood fatal("ssh_exchange_identification: " 4821305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood "read: %.100s", strerror(errno)); 4831305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood if (buf[i] == '\r') { 4841305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood buf[i] = '\n'; 4851305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood buf[i + 1] = 0; 4861305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood continue; /**XXX wait for \n */ 4871305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood } 4881305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood if (buf[i] == '\n') { 4891305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood buf[i + 1] = 0; 4901305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood break; 4911305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood } 4921305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood if (++n > 65536) 4931305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood fatal("ssh_exchange_identification: " 4941305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood "No banner received"); 4951305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood } 4961305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood buf[sizeof(buf) - 1] = 0; 4971305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood if (strncmp(buf, "SSH-", 4) == 0) 4981305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood break; 4991305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood debug("ssh_exchange_identification: %s", buf); 5001305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood } 5011305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood server_version_string = xstrdup(buf); 5021305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood xfree(fdset); 5031305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood 5041305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood /* 5051305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood * Check that the versions match. In future this might accept 5061305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood * several versions and set appropriate flags to handle them. 5071305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood */ 5081305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood if (sscanf(server_version_string, "SSH-%d.%d-%[^\n]\n", 5091305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood &remote_major, &remote_minor, remote_version) != 3) 5101305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood fatal("Bad remote protocol version identification: '%.100s'", buf); 5111305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood debug("Remote protocol version %d.%d, remote software version %.100s", 5121305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood remote_major, remote_minor, remote_version); 5131305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood 5141305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood compat_datafellows(remote_version); 5151305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood mismatch = 0; 5161305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood 5171305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood switch (remote_major) { 5181305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood case 1: 5191305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood if (remote_minor == 99 && 5201305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood (options.protocol & SSH_PROTO_2) && 5211305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood !(options.protocol & SSH_PROTO_1_PREFERRED)) { 5221305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood enable_compat20(); 5231305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood break; 5241305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood } 5251305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood if (!(options.protocol & SSH_PROTO_1)) { 5261305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood mismatch = 1; 5271305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood break; 5281305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood } 5291305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood if (remote_minor < 3) { 5301305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood fatal("Remote machine has too old SSH software version."); 5311305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood } else if (remote_minor == 3 || remote_minor == 4) { 5321305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood /* We speak 1.3, too. */ 5331305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood enable_compat13(); 5341305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood minor1 = 3; 5351305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood if (options.forward_agent) { 5361305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood logit("Agent forwarding disabled for protocol 1.3"); 5371305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood options.forward_agent = 0; 5381305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood } 5391305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood } 5401305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood break; 5411305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood case 2: 5421305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood if (options.protocol & SSH_PROTO_2) { 5431305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood enable_compat20(); 5441305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood break; 5451305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood } 5461305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood /* FALLTHROUGH */ 5471305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood default: 5481305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood mismatch = 1; 5491305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood break; 5501305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood } 5511305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood if (mismatch) 5521305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood fatal("Protocol major versions differ: %d vs. %d", 5531305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood (options.protocol & SSH_PROTO_2) ? PROTOCOL_MAJOR_2 : PROTOCOL_MAJOR_1, 5541305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood remote_major); 5551305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood /* Send our own protocol version identification. */ 5561305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood snprintf(buf, sizeof buf, "SSH-%d.%d-%.100s%s", 5571305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood compat20 ? PROTOCOL_MAJOR_2 : PROTOCOL_MAJOR_1, 5581305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood compat20 ? PROTOCOL_MINOR_2 : minor1, 5591305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood SSH_VERSION, compat20 ? "\r\n" : "\n"); 5601305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood if (roaming_atomicio(vwrite, connection_out, buf, strlen(buf)) 5611305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood != strlen(buf)) 5621305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood fatal("write: %.100s", strerror(errno)); 5631305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood client_version_string = xstrdup(buf); 5641305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood chop(client_version_string); 5651305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood chop(server_version_string); 5661305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood debug("Local version string %.100s", client_version_string); 5671305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood} 5681305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood 5691305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood/* defaults to 'no' */ 5701305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwoodstatic int 5711305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwoodconfirm(const char *prompt) 5721305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood{ 5731305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood const char *msg, *again = "Please type 'yes' or 'no': "; 5741305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood char *p; 5751305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood int ret = -1; 5761305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood 5771305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood if (options.batch_mode) 5781305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood return 0; 5791305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood for (msg = prompt;;msg = again) { 5801305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood p = read_passphrase(msg, RP_ECHO); 5811305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood if (p == NULL || 5821305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood (p[0] == '\0') || (p[0] == '\n') || 5831305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood strncasecmp(p, "no", 2) == 0) 5841305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood ret = 0; 5851305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood if (p && strncasecmp(p, "yes", 3) == 0) 5861305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood ret = 1; 5871305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood if (p) 5881305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood xfree(p); 5891305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood if (ret != -1) 5901305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood return ret; 5911305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood } 5921305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood} 5931305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood 5941305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwoodstatic int 5951305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwoodcheck_host_cert(const char *host, const Key *host_key) 5961305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood{ 5971305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood const char *reason; 5981305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood 5991305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood if (key_cert_check_authority(host_key, 1, 0, host, &reason) != 0) { 6001305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood error("%s", reason); 6011305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood return 0; 6021305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood } 6031305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood if (buffer_len(&host_key->cert->critical) != 0) { 6041305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood error("Certificate for %s contains unsupported " 6051305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood "critical options(s)", host); 6061305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood return 0; 6071305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood } 6081305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood return 1; 6091305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood} 6101305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood 6111305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwoodstatic int 6121305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwoodsockaddr_is_local(struct sockaddr *hostaddr) 6131305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood{ 6141305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood switch (hostaddr->sa_family) { 6151305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood case AF_INET: 6161305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood return (ntohl(((struct sockaddr_in *)hostaddr)-> 6171305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood sin_addr.s_addr) >> 24) == IN_LOOPBACKNET; 6181305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood case AF_INET6: 6191305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood return IN6_IS_ADDR_LOOPBACK( 6201305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood &(((struct sockaddr_in6 *)hostaddr)->sin6_addr)); 6211305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood default: 6221305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood return 0; 6231305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood } 6241305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood} 6251305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood 6261305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood/* 6271305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood * Prepare the hostname and ip address strings that are used to lookup 6281305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood * host keys in known_hosts files. These may have a port number appended. 6291305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood */ 6301305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwoodvoid 6311305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwoodget_hostfile_hostname_ipaddr(char *hostname, struct sockaddr *hostaddr, 6321305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood u_short port, char **hostfile_hostname, char **hostfile_ipaddr) 6331305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood{ 6341305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood char ntop[NI_MAXHOST]; 6351305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood socklen_t addrlen; 6361305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood 6371305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood switch (hostaddr == NULL ? -1 : hostaddr->sa_family) { 6381305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood case -1: 6391305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood addrlen = 0; 6401305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood break; 6411305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood case AF_INET: 6421305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood addrlen = sizeof(struct sockaddr_in); 6431305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood break; 6441305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood case AF_INET6: 6451305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood addrlen = sizeof(struct sockaddr_in6); 6461305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood break; 6471305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood default: 6481305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood addrlen = sizeof(struct sockaddr); 6491305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood break; 6501305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood } 6511305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood 6521305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood /* 6531305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood * We don't have the remote ip-address for connections 6541305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood * using a proxy command 6551305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood */ 6561305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood if (hostfile_ipaddr != NULL) { 6571305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood if (options.proxy_command == NULL) { 6581305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood if (getnameinfo(hostaddr, addrlen, 6591305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood ntop, sizeof(ntop), NULL, 0, NI_NUMERICHOST) != 0) 6601305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood fatal("check_host_key: getnameinfo failed"); 6611305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood *hostfile_ipaddr = put_host_port(ntop, port); 6621305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood } else { 6631305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood *hostfile_ipaddr = xstrdup("<no hostip for proxy " 6641305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood "command>"); 6651305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood } 6661305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood } 6671305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood 6681305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood /* 6691305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood * Allow the user to record the key under a different name or 6701305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood * differentiate a non-standard port. This is useful for ssh 6711305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood * tunneling over forwarded connections or if you run multiple 6721305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood * sshd's on different ports on the same machine. 6731305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood */ 6741305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood if (hostfile_hostname != NULL) { 6751305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood if (options.host_key_alias != NULL) { 6761305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood *hostfile_hostname = xstrdup(options.host_key_alias); 6771305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood debug("using hostkeyalias: %s", *hostfile_hostname); 6781305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood } else { 6791305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood *hostfile_hostname = put_host_port(hostname, port); 6801305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood } 6811305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood } 6821305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood} 6831305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood 6841305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood/* 6851305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood * check whether the supplied host key is valid, return -1 if the key 6861305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood * is not valid. user_hostfile[0] will not be updated if 'readonly' is true. 6871305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood */ 6881305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood#define RDRW 0 6891305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood#define RDONLY 1 6901305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood#define ROQUIET 2 6911305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwoodstatic int 6921305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwoodcheck_host_key(char *hostname, struct sockaddr *hostaddr, u_short port, 6931305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood Key *host_key, int readonly, 6941305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood char **user_hostfiles, u_int num_user_hostfiles, 6951305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood char **system_hostfiles, u_int num_system_hostfiles) 6961305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood{ 6971305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood HostStatus host_status; 6981305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood HostStatus ip_status; 6991305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood Key *raw_key = NULL; 7001305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood char *ip = NULL, *host = NULL; 7011305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood char hostline[1000], *hostp, *fp, *ra; 7021305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood char msg[1024]; 7031305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood const char *type; 7041305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood const struct hostkey_entry *host_found, *ip_found; 7051305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood int len, cancelled_forwarding = 0; 7061305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood int local = sockaddr_is_local(hostaddr); 7071305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood int r, want_cert = key_is_cert(host_key), host_ip_differ = 0; 7081305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood struct hostkeys *host_hostkeys, *ip_hostkeys; 7091305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood u_int i; 7101305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood 7111305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood /* 7121305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood * Force accepting of the host key for loopback/localhost. The 7131305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood * problem is that if the home directory is NFS-mounted to multiple 7141305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood * machines, localhost will refer to a different machine in each of 7151305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood * them, and the user will get bogus HOST_CHANGED warnings. This 7161305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood * essentially disables host authentication for localhost; however, 7171305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood * this is probably not a real problem. 7181305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood */ 7191305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood if (options.no_host_authentication_for_localhost == 1 && local && 7201305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood options.host_key_alias == NULL) { 7211305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood debug("Forcing accepting of host key for " 7221305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood "loopback/localhost."); 7231305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood return 0; 7241305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood } 7251305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood 7261305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood /* 7271305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood * Prepare the hostname and address strings used for hostkey lookup. 7281305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood * In some cases, these will have a port number appended. 7291305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood */ 7301305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood get_hostfile_hostname_ipaddr(hostname, hostaddr, port, &host, &ip); 7311305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood 7321305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood /* 7331305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood * Turn off check_host_ip if the connection is to localhost, via proxy 7341305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood * command or if we don't have a hostname to compare with 7351305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood */ 7361305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood if (options.check_host_ip && (local || 7371305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood strcmp(hostname, ip) == 0 || options.proxy_command != NULL)) 7381305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood options.check_host_ip = 0; 7391305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood 7401305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood host_hostkeys = init_hostkeys(); 7411305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood for (i = 0; i < num_user_hostfiles; i++) 7421305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood load_hostkeys(host_hostkeys, host, user_hostfiles[i]); 7431305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood for (i = 0; i < num_system_hostfiles; i++) 7441305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood load_hostkeys(host_hostkeys, host, system_hostfiles[i]); 7451305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood 7461305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood ip_hostkeys = NULL; 7471305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood if (!want_cert && options.check_host_ip) { 7481305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood ip_hostkeys = init_hostkeys(); 7491305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood for (i = 0; i < num_user_hostfiles; i++) 7501305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood load_hostkeys(ip_hostkeys, ip, user_hostfiles[i]); 7511305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood for (i = 0; i < num_system_hostfiles; i++) 7521305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood load_hostkeys(ip_hostkeys, ip, system_hostfiles[i]); 7531305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood } 7541305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood 7551305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood retry: 7561305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood /* Reload these as they may have changed on cert->key downgrade */ 7571305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood want_cert = key_is_cert(host_key); 7581305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood type = key_type(host_key); 7591305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood 7601305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood /* 7611305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood * Check if the host key is present in the user's list of known 7621305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood * hosts or in the systemwide list. 7631305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood */ 7641305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood host_status = check_key_in_hostkeys(host_hostkeys, host_key, 7651305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood &host_found); 7661305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood 7671305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood /* 7681305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood * Also perform check for the ip address, skip the check if we are 7691305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood * localhost, looking for a certificate, or the hostname was an ip 7701305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood * address to begin with. 7711305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood */ 7721305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood if (!want_cert && ip_hostkeys != NULL) { 7731305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood ip_status = check_key_in_hostkeys(ip_hostkeys, host_key, 7741305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood &ip_found); 7751305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood if (host_status == HOST_CHANGED && 7761305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood (ip_status != HOST_CHANGED || 7771305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood (ip_found != NULL && 7781305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood !key_equal(ip_found->key, host_found->key)))) 7791305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood host_ip_differ = 1; 7801305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood } else 7811305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood ip_status = host_status; 7821305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood 7831305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood switch (host_status) { 7841305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood case HOST_OK: 7851305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood /* The host is known and the key matches. */ 7861305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood debug("Host '%.200s' is known and matches the %s host %s.", 7871305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood host, type, want_cert ? "certificate" : "key"); 7881305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood debug("Found %s in %s:%lu", want_cert ? "CA key" : "key", 7891305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood host_found->file, host_found->line); 7901305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood if (want_cert && !check_host_cert(hostname, host_key)) 7911305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood goto fail; 7921305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood if (options.check_host_ip && ip_status == HOST_NEW) { 7931305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood if (readonly || want_cert) 7941305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood logit("%s host key for IP address " 7951305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood "'%.128s' not in list of known hosts.", 7961305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood type, ip); 7971305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood else if (!add_host_to_hostfile(user_hostfiles[0], ip, 7981305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood host_key, options.hash_known_hosts)) 7991305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood logit("Failed to add the %s host key for IP " 8001305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood "address '%.128s' to the list of known " 8011305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood "hosts (%.30s).", type, ip, 8021305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood user_hostfiles[0]); 8031305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood else 8041305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood logit("Warning: Permanently added the %s host " 8051305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood "key for IP address '%.128s' to the list " 8061305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood "of known hosts.", type, ip); 8071305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood } else if (options.visual_host_key) { 8081305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood fp = key_fingerprint(host_key, SSH_FP_MD5, SSH_FP_HEX); 8091305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood ra = key_fingerprint(host_key, SSH_FP_MD5, 8101305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood SSH_FP_RANDOMART); 8111305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood logit("Host key fingerprint is %s\n%s\n", fp, ra); 8121305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood xfree(ra); 8131305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood xfree(fp); 8141305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood } 8151305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood break; 8161305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood case HOST_NEW: 8171305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood if (options.host_key_alias == NULL && port != 0 && 8181305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood port != SSH_DEFAULT_PORT) { 8191305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood debug("checking without port identifier"); 8201305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood if (check_host_key(hostname, hostaddr, 0, host_key, 8211305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood ROQUIET, user_hostfiles, num_user_hostfiles, 8221305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood system_hostfiles, num_system_hostfiles) == 0) { 8231305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood debug("found matching key w/out port"); 8241305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood break; 8251305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood } 8261305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood } 8271305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood if (readonly || want_cert) 8281305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood goto fail; 8291305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood /* The host is new. */ 8301305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood if (options.strict_host_key_checking == 1) { 8311305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood /* 8321305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood * User has requested strict host key checking. We 8331305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood * will not add the host key automatically. The only 8341305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood * alternative left is to abort. 8351305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood */ 8361305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood error("No %s host key is known for %.200s and you " 8371305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood "have requested strict checking.", type, host); 8381305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood goto fail; 8391305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood } else if (options.strict_host_key_checking == 2) { 8401305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood char msg1[1024], msg2[1024]; 8411305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood 8421305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood if (show_other_keys(host_hostkeys, host_key)) 8431305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood snprintf(msg1, sizeof(msg1), 8441305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood "\nbut keys of different type are already" 8451305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood " known for this host."); 8461305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood else 8471305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood snprintf(msg1, sizeof(msg1), "."); 8481305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood /* The default */ 8491305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood fp = key_fingerprint(host_key, SSH_FP_MD5, SSH_FP_HEX); 8501305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood ra = key_fingerprint(host_key, SSH_FP_MD5, 8511305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood SSH_FP_RANDOMART); 8521305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood msg2[0] = '\0'; 8531305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood if (options.verify_host_key_dns) { 8541305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood if (matching_host_key_dns) 8551305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood snprintf(msg2, sizeof(msg2), 8561305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood "Matching host key fingerprint" 8571305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood " found in DNS.\n"); 8581305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood else 8591305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood snprintf(msg2, sizeof(msg2), 8601305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood "No matching host key fingerprint" 8611305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood " found in DNS.\n"); 8621305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood } 8631305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood snprintf(msg, sizeof(msg), 8641305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood "The authenticity of host '%.200s (%s)' can't be " 8651305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood "established%s\n" 8661305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood "%s key fingerprint is %s.%s%s\n%s" 8671305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood "Are you sure you want to continue connecting " 8681305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood "(yes/no)? ", 8691305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood host, ip, msg1, type, fp, 8701305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood options.visual_host_key ? "\n" : "", 8711305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood options.visual_host_key ? ra : "", 8721305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood msg2); 8731305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood xfree(ra); 8741305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood xfree(fp); 8751305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood if (!confirm(msg)) 8761305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood goto fail; 8771305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood } 8781305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood /* 8791305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood * If not in strict mode, add the key automatically to the 8801305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood * local known_hosts file. 8811305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood */ 8821305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood if (options.check_host_ip && ip_status == HOST_NEW) { 8831305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood snprintf(hostline, sizeof(hostline), "%s,%s", host, ip); 8841305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood hostp = hostline; 8851305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood if (options.hash_known_hosts) { 8861305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood /* Add hash of host and IP separately */ 8871305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood r = add_host_to_hostfile(user_hostfiles[0], 8881305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood host, host_key, options.hash_known_hosts) && 8891305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood add_host_to_hostfile(user_hostfiles[0], ip, 8901305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood host_key, options.hash_known_hosts); 8911305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood } else { 8921305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood /* Add unhashed "host,ip" */ 8931305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood r = add_host_to_hostfile(user_hostfiles[0], 8941305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood hostline, host_key, 8951305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood options.hash_known_hosts); 8961305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood } 8971305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood } else { 8981305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood r = add_host_to_hostfile(user_hostfiles[0], host, 8991305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood host_key, options.hash_known_hosts); 9001305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood hostp = host; 9011305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood } 9021305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood 9031305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood if (!r) 9041305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood logit("Failed to add the host to the list of known " 9051305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood "hosts (%.500s).", user_hostfiles[0]); 9061305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood else 9071305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood logit("Warning: Permanently added '%.200s' (%s) to the " 9081305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood "list of known hosts.", hostp, type); 9091305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood break; 9101305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood case HOST_REVOKED: 9111305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood error("@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@"); 9121305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood error("@ WARNING: REVOKED HOST KEY DETECTED! @"); 9131305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood error("@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@"); 9141305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood error("The %s host key for %s is marked as revoked.", type, host); 9151305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood error("This could mean that a stolen key is being used to"); 9161305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood error("impersonate this host."); 9171305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood 9181305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood /* 9191305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood * If strict host key checking is in use, the user will have 9201305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood * to edit the key manually and we can only abort. 9211305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood */ 9221305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood if (options.strict_host_key_checking) { 9231305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood error("%s host key for %.200s was revoked and you have " 9241305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood "requested strict checking.", type, host); 9251305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood goto fail; 9261305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood } 9271305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood goto continue_unsafe; 9281305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood 9291305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood case HOST_CHANGED: 9301305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood if (want_cert) { 9311305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood /* 9321305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood * This is only a debug() since it is valid to have 9331305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood * CAs with wildcard DNS matches that don't match 9341305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood * all hosts that one might visit. 9351305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood */ 9361305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood debug("Host certificate authority does not " 9371305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood "match %s in %s:%lu", CA_MARKER, 9381305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood host_found->file, host_found->line); 9391305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood goto fail; 9401305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood } 9411305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood if (readonly == ROQUIET) 9421305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood goto fail; 9431305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood if (options.check_host_ip && host_ip_differ) { 9441305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood char *key_msg; 9451305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood if (ip_status == HOST_NEW) 9461305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood key_msg = "is unknown"; 9471305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood else if (ip_status == HOST_OK) 9481305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood key_msg = "is unchanged"; 9491305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood else 9501305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood key_msg = "has a different value"; 9511305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood error("@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@"); 9521305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood error("@ WARNING: POSSIBLE DNS SPOOFING DETECTED! @"); 9531305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood error("@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@"); 9541305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood error("The %s host key for %s has changed,", type, host); 9551305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood error("and the key for the corresponding IP address %s", ip); 9561305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood error("%s. This could either mean that", key_msg); 9571305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood error("DNS SPOOFING is happening or the IP address for the host"); 9581305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood error("and its host key have changed at the same time."); 9591305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood if (ip_status != HOST_NEW) 9601305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood error("Offending key for IP in %s:%lu", 9611305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood ip_found->file, ip_found->line); 9621305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood } 9631305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood /* The host key has changed. */ 9641305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood warn_changed_key(host_key); 9651305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood error("Add correct host key in %.100s to get rid of this message.", 9661305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood user_hostfiles[0]); 9671305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood error("Offending %s key in %s:%lu", key_type(host_found->key), 9681305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood host_found->file, host_found->line); 9691305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood 9701305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood /* 9711305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood * If strict host key checking is in use, the user will have 9721305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood * to edit the key manually and we can only abort. 9731305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood */ 9741305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood if (options.strict_host_key_checking) { 9751305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood error("%s host key for %.200s has changed and you have " 9761305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood "requested strict checking.", type, host); 9771305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood goto fail; 9781305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood } 9791305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood 9801305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood continue_unsafe: 9811305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood /* 9821305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood * If strict host key checking has not been requested, allow 9831305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood * the connection but without MITM-able authentication or 9841305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood * forwarding. 9851305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood */ 9861305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood if (options.password_authentication) { 9871305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood error("Password authentication is disabled to avoid " 9881305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood "man-in-the-middle attacks."); 9891305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood options.password_authentication = 0; 9901305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood cancelled_forwarding = 1; 9911305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood } 9921305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood if (options.kbd_interactive_authentication) { 9931305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood error("Keyboard-interactive authentication is disabled" 9941305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood " to avoid man-in-the-middle attacks."); 9951305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood options.kbd_interactive_authentication = 0; 9961305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood options.challenge_response_authentication = 0; 9971305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood cancelled_forwarding = 1; 9981305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood } 9991305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood if (options.challenge_response_authentication) { 10001305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood error("Challenge/response authentication is disabled" 10011305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood " to avoid man-in-the-middle attacks."); 10021305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood options.challenge_response_authentication = 0; 10031305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood cancelled_forwarding = 1; 10041305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood } 10051305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood if (options.forward_agent) { 10061305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood error("Agent forwarding is disabled to avoid " 10071305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood "man-in-the-middle attacks."); 10081305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood options.forward_agent = 0; 10091305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood cancelled_forwarding = 1; 10101305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood } 10111305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood if (options.forward_x11) { 10121305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood error("X11 forwarding is disabled to avoid " 10131305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood "man-in-the-middle attacks."); 10141305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood options.forward_x11 = 0; 10151305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood cancelled_forwarding = 1; 10161305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood } 10171305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood if (options.num_local_forwards > 0 || 10181305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood options.num_remote_forwards > 0) { 10191305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood error("Port forwarding is disabled to avoid " 10201305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood "man-in-the-middle attacks."); 10211305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood options.num_local_forwards = 10221305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood options.num_remote_forwards = 0; 10231305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood cancelled_forwarding = 1; 10241305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood } 10251305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood if (options.tun_open != SSH_TUNMODE_NO) { 10261305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood error("Tunnel forwarding is disabled to avoid " 10271305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood "man-in-the-middle attacks."); 10281305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood options.tun_open = SSH_TUNMODE_NO; 10291305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood cancelled_forwarding = 1; 10301305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood } 10311305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood if (options.exit_on_forward_failure && cancelled_forwarding) 10321305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood fatal("Error: forwarding disabled due to host key " 10331305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood "check failure"); 10341305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood 10351305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood /* 10361305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood * XXX Should permit the user to change to use the new id. 10371305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood * This could be done by converting the host key to an 10381305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood * identifying sentence, tell that the host identifies itself 10391305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood * by that sentence, and ask the user if he/she wishes to 10401305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood * accept the authentication. 10411305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood */ 10421305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood break; 10431305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood case HOST_FOUND: 10441305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood fatal("internal error"); 10451305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood break; 10461305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood } 10471305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood 10481305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood if (options.check_host_ip && host_status != HOST_CHANGED && 10491305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood ip_status == HOST_CHANGED) { 10501305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood snprintf(msg, sizeof(msg), 10511305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood "Warning: the %s host key for '%.200s' " 10521305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood "differs from the key for the IP address '%.128s'" 10531305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood "\nOffending key for IP in %s:%lu", 10541305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood type, host, ip, ip_found->file, ip_found->line); 10551305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood if (host_status == HOST_OK) { 10561305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood len = strlen(msg); 10571305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood snprintf(msg + len, sizeof(msg) - len, 10581305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood "\nMatching host key in %s:%lu", 10591305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood host_found->file, host_found->line); 10601305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood } 10611305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood if (options.strict_host_key_checking == 1) { 10621305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood logit("%s", msg); 10631305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood error("Exiting, you have requested strict checking."); 10641305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood goto fail; 10651305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood } else if (options.strict_host_key_checking == 2) { 10661305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood strlcat(msg, "\nAre you sure you want " 10671305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood "to continue connecting (yes/no)? ", sizeof(msg)); 10681305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood if (!confirm(msg)) 10691305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood goto fail; 10701305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood } else { 10711305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood logit("%s", msg); 10721305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood } 10731305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood } 10741305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood 10751305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood xfree(ip); 10761305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood xfree(host); 10771305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood if (host_hostkeys != NULL) 10781305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood free_hostkeys(host_hostkeys); 10791305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood if (ip_hostkeys != NULL) 10801305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood free_hostkeys(ip_hostkeys); 10811305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood return 0; 10821305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood 10831305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwoodfail: 10841305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood if (want_cert && host_status != HOST_REVOKED) { 10851305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood /* 10861305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood * No matching certificate. Downgrade cert to raw key and 10871305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood * search normally. 10881305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood */ 10891305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood debug("No matching CA found. Retry with plain key"); 10901305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood raw_key = key_from_private(host_key); 10911305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood if (key_drop_cert(raw_key) != 0) 10921305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood fatal("Couldn't drop certificate"); 10931305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood host_key = raw_key; 10941305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood goto retry; 10951305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood } 10961305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood if (raw_key != NULL) 10971305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood key_free(raw_key); 10981305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood xfree(ip); 10991305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood xfree(host); 11001305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood if (host_hostkeys != NULL) 11011305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood free_hostkeys(host_hostkeys); 11021305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood if (ip_hostkeys != NULL) 11031305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood free_hostkeys(ip_hostkeys); 11041305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood return -1; 11051305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood} 11061305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood 11071305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood/* returns 0 if key verifies or -1 if key does NOT verify */ 11081305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwoodint 11091305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwoodverify_host_key(char *host, struct sockaddr *hostaddr, Key *host_key) 11101305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood{ 11111305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood int flags = 0; 11121305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood char *fp; 11131305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood 11141305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood fp = key_fingerprint(host_key, SSH_FP_MD5, SSH_FP_HEX); 11151305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood debug("Server host key: %s %s", key_type(host_key), fp); 11161305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood xfree(fp); 11171305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood 11181305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood /* XXX certs are not yet supported for DNS */ 11191305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood if (!key_is_cert(host_key) && options.verify_host_key_dns && 11201305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood verify_host_key_dns(host, hostaddr, host_key, &flags) == 0) { 11211305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood if (flags & DNS_VERIFY_FOUND) { 11221305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood 11231305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood if (options.verify_host_key_dns == 1 && 11241305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood flags & DNS_VERIFY_MATCH && 11251305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood flags & DNS_VERIFY_SECURE) 11261305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood return 0; 11271305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood 11281305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood if (flags & DNS_VERIFY_MATCH) { 11291305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood matching_host_key_dns = 1; 11301305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood } else { 11311305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood warn_changed_key(host_key); 11321305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood error("Update the SSHFP RR in DNS with the new " 11331305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood "host key to get rid of this message."); 11341305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood } 11351305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood } 11361305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood } 11371305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood 11381305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood return check_host_key(host, hostaddr, options.port, host_key, RDRW, 11391305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood options.user_hostfiles, options.num_user_hostfiles, 11401305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood options.system_hostfiles, options.num_system_hostfiles); 11411305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood} 11421305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood 11431305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood/* 11441305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood * Starts a dialog with the server, and authenticates the current user on the 11451305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood * server. This does not need any extra privileges. The basic connection 11461305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood * to the server must already have been established before this is called. 11471305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood * If login fails, this function prints an error and never returns. 11481305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood * This function does not require super-user privileges. 11491305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood */ 11501305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwoodvoid 11511305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwoodssh_login(Sensitive *sensitive, const char *orighost, 11521305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood struct sockaddr *hostaddr, u_short port, struct passwd *pw, int timeout_ms) 11531305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood{ 11541305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood char *host, *cp; 11551305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood char *server_user, *local_user; 11561305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood 11571305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood local_user = xstrdup(pw->pw_name); 11581305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood server_user = options.user ? options.user : local_user; 11591305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood 11601305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood /* Convert the user-supplied hostname into all lowercase. */ 11611305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood host = xstrdup(orighost); 11621305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood for (cp = host; *cp; cp++) 11631305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood if (isupper(*cp)) 11641305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood *cp = (char)tolower(*cp); 11651305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood 11661305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood /* Exchange protocol version identification strings with the server. */ 11671305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood ssh_exchange_identification(timeout_ms); 11681305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood 11691305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood /* Put the connection into non-blocking mode. */ 11701305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood packet_set_nonblocking(); 11711305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood 11721305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood /* key exchange */ 11731305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood /* authenticate user */ 11741305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood if (compat20) { 11751305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood ssh_kex2(host, hostaddr, port); 11761305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood ssh_userauth2(local_user, server_user, host, sensitive); 11771305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood } else { 11781305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood ssh_kex(host, hostaddr); 11791305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood ssh_userauth1(local_user, server_user, host, sensitive); 11801305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood } 11811305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood xfree(local_user); 11821305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood} 11831305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood 11841305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwoodvoid 11851305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwoodssh_put_password(char *password) 11861305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood{ 11871305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood int size; 11881305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood char *padded; 11891305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood 11901305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood if (datafellows & SSH_BUG_PASSWORDPAD) { 11911305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood packet_put_cstring(password); 11921305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood return; 11931305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood } 11941305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood size = roundup(strlen(password) + 1, 32); 11951305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood padded = xcalloc(1, size); 11961305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood strlcpy(padded, password, size); 11971305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood packet_put_string(padded, size); 11981305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood memset(padded, 0, size); 11991305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood xfree(padded); 12001305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood} 12011305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood 12021305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood/* print all known host keys for a given host, but skip keys of given type */ 12031305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwoodstatic int 12041305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwoodshow_other_keys(struct hostkeys *hostkeys, Key *key) 12051305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood{ 12061305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood int type[] = { KEY_RSA1, KEY_RSA, KEY_DSA, KEY_ECDSA, -1}; 12071305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood int i, ret = 0; 12081305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood char *fp, *ra; 12091305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood const struct hostkey_entry *found; 12101305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood 12111305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood for (i = 0; type[i] != -1; i++) { 12121305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood if (type[i] == key->type) 12131305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood continue; 12141305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood if (!lookup_key_in_hostkeys_by_type(hostkeys, type[i], &found)) 12151305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood continue; 12161305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood fp = key_fingerprint(found->key, SSH_FP_MD5, SSH_FP_HEX); 12171305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood ra = key_fingerprint(found->key, SSH_FP_MD5, SSH_FP_RANDOMART); 12181305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood logit("WARNING: %s key found for host %s\n" 12191305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood "in %s:%lu\n" 12201305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood "%s key fingerprint %s.", 12211305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood key_type(found->key), 12221305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood found->host, found->file, found->line, 12231305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood key_type(found->key), fp); 12241305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood if (options.visual_host_key) 12251305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood logit("%s", ra); 12261305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood xfree(ra); 12271305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood xfree(fp); 12281305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood ret = 1; 12291305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood } 12301305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood return ret; 12311305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood} 12321305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood 12331305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwoodstatic void 12341305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwoodwarn_changed_key(Key *host_key) 12351305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood{ 12361305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood char *fp; 12371305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood 12381305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood fp = key_fingerprint(host_key, SSH_FP_MD5, SSH_FP_HEX); 12391305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood 12401305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood error("@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@"); 12411305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood error("@ WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED! @"); 12421305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood error("@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@"); 12431305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood error("IT IS POSSIBLE THAT SOMEONE IS DOING SOMETHING NASTY!"); 12441305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood error("Someone could be eavesdropping on you right now (man-in-the-middle attack)!"); 12451305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood error("It is also possible that a host key has just been changed."); 12461305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood error("The fingerprint for the %s key sent by the remote host is\n%s.", 12471305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood key_type(host_key), fp); 12481305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood error("Please contact your system administrator."); 12491305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood 12501305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood xfree(fp); 12511305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood} 12521305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood 12531305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood/* 12541305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood * Execute a local command 12551305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood */ 12561305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwoodint 12571305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwoodssh_local_cmd(const char *args) 12581305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood{ 12591305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood char *shell; 12601305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood pid_t pid; 12611305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood int status; 12621305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood void (*osighand)(int); 12631305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood 12641305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood if (!options.permit_local_command || 12651305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood args == NULL || !*args) 12661305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood return (1); 12671305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood 12681305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood if ((shell = getenv("SHELL")) == NULL || *shell == '\0') 12691305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood shell = _PATH_BSHELL; 12701305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood 12711305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood osighand = signal(SIGCHLD, SIG_DFL); 12721305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood pid = fork(); 12731305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood if (pid == 0) { 12741305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood signal(SIGPIPE, SIG_DFL); 12751305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood debug3("Executing %s -c \"%s\"", shell, args); 12761305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood execl(shell, shell, "-c", args, (char *)NULL); 12771305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood error("Couldn't execute %s -c \"%s\": %s", 12781305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood shell, args, strerror(errno)); 12791305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood _exit(1); 12801305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood } else if (pid == -1) 12811305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood fatal("fork failed: %.100s", strerror(errno)); 12821305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood while (waitpid(pid, &status, 0) == -1) 12831305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood if (errno != EINTR) 12841305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood fatal("Couldn't wait for child: %s", strerror(errno)); 12851305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood signal(SIGCHLD, osighand); 12861305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood 12871305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood if (!WIFEXITED(status)) 12881305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood return (1); 12891305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood 12901305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood return (WEXITSTATUS(status)); 12911305e95ba6ff9fa202d0818caf10405df4b0f648Mike Lockwood} 1292