2 * Author: Tatu Ylonen <ylo@cs.hut.fi>
3 * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
5 * Code to connect to a remote host, and to perform the client side of the
6 * login (authentication) dialog.
8 * As far as I am concerned, the code I have written for this software
9 * can be used freely for any purpose. Any derived versions of this
10 * software must be clearly marked as such, and if the derived work is
11 * incompatible with the protocol description in the RFC file, it must be
12 * called by a name other than "ssh" or "Secure Shell".
16 RCSID("$OpenBSD: sshconnect.c,v 1.134 2002/09/13 19:23:09 stevesk Exp $");
18 #include <openssl/bn.h>
28 #include "sshconnect.h"
36 char *client_version_string = NULL;
37 char *server_version_string = NULL;
40 extern Options options;
41 extern char *__progname;
42 extern uid_t original_real_uid;
43 extern uid_t original_effective_uid;
45 #ifndef INET6_ADDRSTRLEN /* for non IPv6 machines */
46 #define INET6_ADDRSTRLEN 46
49 static int show_other_keys(const char *, Key *);
52 * Connect to the given ssh server using a proxy command.
55 ssh_proxy_connect(const char *host, u_short port, const char *proxy_command)
62 char strport[NI_MAXSERV];
64 /* Convert the port number into a string. */
65 snprintf(strport, sizeof strport, "%hu", port);
67 /* Build the final command string in the buffer by making the
68 appropriate substitutions to the given proxy command. */
69 buffer_init(&command);
70 for (cp = proxy_command; *cp; cp++) {
71 if (cp[0] == '%' && cp[1] == '%') {
72 buffer_append(&command, "%", 1);
76 if (cp[0] == '%' && cp[1] == 'h') {
77 buffer_append(&command, host, strlen(host));
81 if (cp[0] == '%' && cp[1] == 'p') {
82 buffer_append(&command, strport, strlen(strport));
86 buffer_append(&command, cp, 1);
88 buffer_append(&command, "\0", 1);
90 /* Get the final command string. */
91 command_string = buffer_ptr(&command);
93 /* Create pipes for communicating with the proxy. */
94 if (pipe(pin) < 0 || pipe(pout) < 0)
95 fatal("Could not create pipes to communicate with the proxy: %.100s",
98 debug("Executing proxy command: %.500s", command_string);
100 /* Fork and execute the proxy command. */
101 if ((pid = fork()) == 0) {
104 /* Child. Permanently give up superuser privileges. */
105 seteuid(original_real_uid);
106 setuid(original_real_uid);
108 /* Redirect stdin and stdout. */
111 if (dup2(pin[0], 0) < 0)
112 perror("dup2 stdin");
116 if (dup2(pout[1], 1) < 0)
117 perror("dup2 stdout");
118 /* Cannot be 1 because pin allocated two descriptors. */
121 /* Stderr is left as it is so that error messages get
122 printed on the user's terminal. */
123 argv[0] = _PATH_BSHELL;
125 argv[2] = command_string;
128 /* Execute the proxy command. Note that we gave up any
129 extra privileges above. */
130 execv(argv[0], argv);
136 fatal("fork failed: %.100s", strerror(errno));
138 /* Close child side of the descriptors. */
142 /* Free the command name. */
143 buffer_free(&command);
145 /* Set the connection file descriptors. */
146 packet_set_connection(pout[0], pin[1]);
148 /* Indicate OK return */
153 * Creates a (possibly privileged) socket for use as the ssh connection.
156 ssh_create_socket(int privileged, int family)
159 struct addrinfo hints, *res;
162 * If we are running as root and want to connect to a privileged
163 * port, bind our own socket to a privileged port.
166 int p = IPPORT_RESERVED - 1;
168 sock = rresvport_af(&p, family);
171 error("rresvport: af=%d %.100s", family, strerror(errno));
173 debug("Allocated local port %d.", p);
176 sock = socket(family, SOCK_STREAM, 0);
178 error("socket: %.100s", strerror(errno));
180 /* Bind the socket to an alternative local IP address */
181 if (options.bind_address == NULL)
184 memset(&hints, 0, sizeof(hints));
185 hints.ai_family = family;
186 hints.ai_socktype = SOCK_STREAM;
187 hints.ai_flags = AI_PASSIVE;
188 gaierr = getaddrinfo(options.bind_address, "0", &hints, &res);
190 error("getaddrinfo: %s: %s", options.bind_address,
191 gai_strerror(gaierr));
195 if (bind(sock, res->ai_addr, res->ai_addrlen) < 0) {
196 error("bind: %s: %s", options.bind_address, strerror(errno));
206 * Opens a TCP/IP connection to the remote server on the given host.
207 * The address of the remote host will be returned in hostaddr.
208 * If port is 0, the default port will be used. If needpriv is true,
209 * a privileged port will be allocated to make the connection.
210 * This requires super-user privileges if needpriv is true.
211 * Connection_attempts specifies the maximum number of tries (one per
212 * second). If proxy_command is non-NULL, it specifies the command (with %h
213 * and %p substituted for host and port, respectively) to use to contact
217 * ECONNREFUSED if we got a "Connection Refused" by the peer on any address
218 * ECONNABORTED if we failed without a "Connection refused"
219 * Suitable error messages for the connection failure will already have been
223 ssh_connect(const char *host, struct sockaddr_storage * hostaddr,
224 u_short port, int family, int connection_attempts,
225 int needpriv, const char *proxy_command)
229 int sock = -1, attempt;
230 char ntop[NI_MAXHOST], strport[NI_MAXSERV];
231 struct addrinfo hints, *ai, *aitop;
234 * Did we get only other errors than "Connection refused" (which
235 * should block fallback to rsh and similar), or did we get at least
236 * one "Connection refused"?
238 int full_failure = 1;
240 debug("ssh_connect: needpriv %d", needpriv);
242 /* Get default port if port has not been set. */
244 sp = getservbyname(SSH_SERVICE_NAME, "tcp");
246 port = ntohs(sp->s_port);
248 port = SSH_DEFAULT_PORT;
250 /* If a proxy command is given, connect using it. */
251 if (proxy_command != NULL)
252 return ssh_proxy_connect(host, port, proxy_command);
254 /* No proxy command. */
256 memset(&hints, 0, sizeof(hints));
257 hints.ai_family = family;
258 hints.ai_socktype = SOCK_STREAM;
259 snprintf(strport, sizeof strport, "%u", port);
260 if ((gaierr = getaddrinfo(host, strport, &hints, &aitop)) != 0)
261 fatal("%s: %.100s: %s", __progname, host,
262 gai_strerror(gaierr));
265 * Try to connect several times. On some machines, the first time
266 * will sometimes fail. In general socket code appears to behave
267 * quite magically on many machines.
269 for (attempt = 0; ;) {
271 debug("Trying again...");
273 /* Loop through addresses for this host, and try each one in
274 sequence until the connection succeeds. */
275 for (ai = aitop; ai; ai = ai->ai_next) {
276 if (ai->ai_family != AF_INET && ai->ai_family != AF_INET6)
278 if (getnameinfo(ai->ai_addr, ai->ai_addrlen,
279 ntop, sizeof(ntop), strport, sizeof(strport),
280 NI_NUMERICHOST|NI_NUMERICSERV) != 0) {
281 error("ssh_connect: getnameinfo failed");
284 debug("Connecting to %.200s [%.100s] port %s.",
285 host, ntop, strport);
287 /* Create a socket for connecting. */
288 sock = ssh_create_socket(needpriv, ai->ai_family);
290 /* Any error is already output */
293 if (connect(sock, ai->ai_addr, ai->ai_addrlen) >= 0) {
294 /* Successful connection. */
295 memcpy(hostaddr, ai->ai_addr, ai->ai_addrlen);
298 if (errno == ECONNREFUSED)
300 debug("connect to address %s port %s: %s",
301 ntop, strport, strerror(errno));
303 * Close the failed socket; there appear to
304 * be some problems when reusing a socket for
305 * which connect() has already returned an
312 break; /* Successful connection. */
315 if (attempt >= connection_attempts)
317 /* Sleep a moment before retrying. */
323 /* Return failure if we didn't get a successful connection. */
324 if (attempt >= connection_attempts) {
325 log("ssh: connect to host %s port %s: %s",
326 host, strport, strerror(errno));
327 return full_failure ? ECONNABORTED : ECONNREFUSED;
330 debug("Connection established.");
332 /* Set keepalives if requested. */
333 if (options.keepalives &&
334 setsockopt(sock, SOL_SOCKET, SO_KEEPALIVE, (void *)&on,
336 error("setsockopt SO_KEEPALIVE: %.100s", strerror(errno));
338 /* Set the connection. */
339 packet_set_connection(sock, sock);
345 * Waits for the server identification string, and sends our own
346 * identification string.
349 ssh_exchange_identification(void)
351 char buf[256], remote_version[256]; /* must be same size! */
352 int remote_major, remote_minor, i, mismatch;
353 int connection_in = packet_get_connection_in();
354 int connection_out = packet_get_connection_out();
355 int minor1 = PROTOCOL_MINOR_1;
357 /* Read other side\'s version identification. */
359 for (i = 0; i < sizeof(buf) - 1; i++) {
360 int len = atomicio(read, connection_in, &buf[i], 1);
362 fatal("ssh_exchange_identification: read: %.100s", strerror(errno));
364 fatal("ssh_exchange_identification: Connection closed by remote host");
365 if (buf[i] == '\r') {
368 continue; /**XXX wait for \n */
370 if (buf[i] == '\n') {
375 buf[sizeof(buf) - 1] = 0;
376 if (strncmp(buf, "SSH-", 4) == 0)
378 debug("ssh_exchange_identification: %s", buf);
380 server_version_string = xstrdup(buf);
383 * Check that the versions match. In future this might accept
384 * several versions and set appropriate flags to handle them.
386 if (sscanf(server_version_string, "SSH-%d.%d-%[^\n]\n",
387 &remote_major, &remote_minor, remote_version) != 3)
388 fatal("Bad remote protocol version identification: '%.100s'", buf);
389 debug("Remote protocol version %d.%d, remote software version %.100s",
390 remote_major, remote_minor, remote_version);
392 compat_datafellows(remote_version);
395 switch (remote_major) {
397 if (remote_minor == 99 &&
398 (options.protocol & SSH_PROTO_2) &&
399 !(options.protocol & SSH_PROTO_1_PREFERRED)) {
403 if (!(options.protocol & SSH_PROTO_1)) {
407 if (remote_minor < 3) {
408 fatal("Remote machine has too old SSH software version.");
409 } else if (remote_minor == 3 || remote_minor == 4) {
410 /* We speak 1.3, too. */
413 if (options.forward_agent) {
414 log("Agent forwarding disabled for protocol 1.3");
415 options.forward_agent = 0;
420 if (options.protocol & SSH_PROTO_2) {
430 fatal("Protocol major versions differ: %d vs. %d",
431 (options.protocol & SSH_PROTO_2) ? PROTOCOL_MAJOR_2 : PROTOCOL_MAJOR_1,
433 /* Send our own protocol version identification. */
434 snprintf(buf, sizeof buf, "SSH-%d.%d-%.100s\n",
435 compat20 ? PROTOCOL_MAJOR_2 : PROTOCOL_MAJOR_1,
436 compat20 ? PROTOCOL_MINOR_2 : minor1,
438 if (atomicio(write, connection_out, buf, strlen(buf)) != strlen(buf))
439 fatal("write: %.100s", strerror(errno));
440 client_version_string = xstrdup(buf);
441 chop(client_version_string);
442 chop(server_version_string);
443 debug("Local version string %.100s", client_version_string);
446 /* defaults to 'no' */
448 confirm(const char *prompt)
450 const char *msg, *again = "Please type 'yes' or 'no': ";
454 if (options.batch_mode)
456 for (msg = prompt;;msg = again) {
457 p = read_passphrase(msg, RP_ECHO);
459 (p[0] == '\0') || (p[0] == '\n') ||
460 strncasecmp(p, "no", 2) == 0)
462 if (p && strncasecmp(p, "yes", 3) == 0)
472 * check whether the supplied host key is valid, return -1 if the key
473 * is not valid. the user_hostfile will not be updated if 'readonly' is true.
476 check_host_key(char *host, struct sockaddr *hostaddr, Key *host_key,
477 int readonly, const char *user_hostfile, const char *system_hostfile)
480 char *type = key_type(host_key);
482 char hostline[1000], *hostp, *fp;
483 HostStatus host_status;
484 HostStatus ip_status;
485 int local = 0, host_ip_differ = 0;
487 char ntop[NI_MAXHOST];
489 int len, host_line, ip_line, has_keys;
490 const char *host_file = NULL, *ip_file = NULL;
493 * Force accepting of the host key for loopback/localhost. The
494 * problem is that if the home directory is NFS-mounted to multiple
495 * machines, localhost will refer to a different machine in each of
496 * them, and the user will get bogus HOST_CHANGED warnings. This
497 * essentially disables host authentication for localhost; however,
498 * this is probably not a real problem.
500 /** hostaddr == 0! */
501 switch (hostaddr->sa_family) {
503 local = (ntohl(((struct sockaddr_in *)hostaddr)->
504 sin_addr.s_addr) >> 24) == IN_LOOPBACKNET;
505 salen = sizeof(struct sockaddr_in);
508 local = IN6_IS_ADDR_LOOPBACK(
509 &(((struct sockaddr_in6 *)hostaddr)->sin6_addr));
510 salen = sizeof(struct sockaddr_in6);
514 salen = sizeof(struct sockaddr_storage);
517 if (options.no_host_authentication_for_localhost == 1 && local &&
518 options.host_key_alias == NULL) {
519 debug("Forcing accepting of host key for "
520 "loopback/localhost.");
525 * We don't have the remote ip-address for connections
526 * using a proxy command
528 if (options.proxy_command == NULL) {
529 if (getnameinfo(hostaddr, salen, ntop, sizeof(ntop),
530 NULL, 0, NI_NUMERICHOST) != 0)
531 fatal("check_host_key: getnameinfo failed");
534 ip = xstrdup("<no hostip for proxy command>");
537 * Turn off check_host_ip if the connection is to localhost, via proxy
538 * command or if we don't have a hostname to compare with
540 if (options.check_host_ip &&
541 (local || strcmp(host, ip) == 0 || options.proxy_command != NULL))
542 options.check_host_ip = 0;
545 * Allow the user to record the key under a different name. This is
546 * useful for ssh tunneling over forwarded connections or if you run
547 * multiple sshd's on different ports on the same machine.
549 if (options.host_key_alias != NULL) {
550 host = options.host_key_alias;
551 debug("using hostkeyalias: %s", host);
555 * Store the host key from the known host file in here so that we can
556 * compare it with the key for the IP address.
558 file_key = key_new(host_key->type);
561 * Check if the host key is present in the user\'s list of known
562 * hosts or in the systemwide list.
564 host_file = user_hostfile;
565 host_status = check_host_in_hostfile(host_file, host, host_key,
566 file_key, &host_line);
567 if (host_status == HOST_NEW) {
568 host_file = system_hostfile;
569 host_status = check_host_in_hostfile(host_file, host, host_key,
570 file_key, &host_line);
573 * Also perform check for the ip address, skip the check if we are
574 * localhost or the hostname was an ip address to begin with
576 if (options.check_host_ip) {
577 Key *ip_key = key_new(host_key->type);
579 ip_file = user_hostfile;
580 ip_status = check_host_in_hostfile(ip_file, ip, host_key,
582 if (ip_status == HOST_NEW) {
583 ip_file = system_hostfile;
584 ip_status = check_host_in_hostfile(ip_file, ip,
585 host_key, ip_key, &ip_line);
587 if (host_status == HOST_CHANGED &&
588 (ip_status != HOST_CHANGED || !key_equal(ip_key, file_key)))
593 ip_status = host_status;
597 switch (host_status) {
599 /* The host is known and the key matches. */
600 debug("Host '%.200s' is known and matches the %s host key.",
602 debug("Found key in %s:%d", host_file, host_line);
603 if (options.check_host_ip && ip_status == HOST_NEW) {
605 log("%s host key for IP address "
606 "'%.128s' not in list of known hosts.",
608 else if (!add_host_to_hostfile(user_hostfile, ip,
610 log("Failed to add the %s host key for IP "
611 "address '%.128s' to the list of known "
612 "hosts (%.30s).", type, ip, user_hostfile);
614 log("Warning: Permanently added the %s host "
615 "key for IP address '%.128s' to the list "
616 "of known hosts.", type, ip);
622 /* The host is new. */
623 if (options.strict_host_key_checking == 1) {
625 * User has requested strict host key checking. We
626 * will not add the host key automatically. The only
627 * alternative left is to abort.
629 error("No %s host key is known for %.200s and you "
630 "have requested strict checking.", type, host);
632 } else if (options.strict_host_key_checking == 2) {
633 has_keys = show_other_keys(host, host_key);
635 fp = key_fingerprint(host_key, SSH_FP_MD5, SSH_FP_HEX);
636 snprintf(msg, sizeof(msg),
637 "The authenticity of host '%.200s (%s)' can't be "
639 "%s key fingerprint is %s.\n"
640 "Are you sure you want to continue connecting "
643 has_keys ? ",\nbut keys of different type are already "
644 "known for this host." : ".",
650 if (options.check_host_ip && ip_status == HOST_NEW) {
651 snprintf(hostline, sizeof(hostline), "%s,%s", host, ip);
657 * If not in strict mode, add the key automatically to the
658 * local known_hosts file.
660 if (!add_host_to_hostfile(user_hostfile, hostp, host_key))
661 log("Failed to add the host to the list of known "
662 "hosts (%.500s).", user_hostfile);
664 log("Warning: Permanently added '%.200s' (%s) to the "
665 "list of known hosts.", hostp, type);
668 if (options.check_host_ip && host_ip_differ) {
670 if (ip_status == HOST_NEW)
672 else if (ip_status == HOST_OK)
673 msg = "is unchanged";
675 msg = "has a different value";
676 error("@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@");
677 error("@ WARNING: POSSIBLE DNS SPOOFING DETECTED! @");
678 error("@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@");
679 error("The %s host key for %s has changed,", type, host);
680 error("and the key for the according IP address %s", ip);
681 error("%s. This could either mean that", msg);
682 error("DNS SPOOFING is happening or the IP address for the host");
683 error("and its host key have changed at the same time.");
684 if (ip_status != HOST_NEW)
685 error("Offending key for IP in %s:%d", ip_file, ip_line);
687 /* The host key has changed. */
688 fp = key_fingerprint(host_key, SSH_FP_MD5, SSH_FP_HEX);
689 error("@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@");
690 error("@ WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED! @");
691 error("@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@");
692 error("IT IS POSSIBLE THAT SOMEONE IS DOING SOMETHING NASTY!");
693 error("Someone could be eavesdropping on you right now (man-in-the-middle attack)!");
694 error("It is also possible that the %s host key has just been changed.", type);
695 error("The fingerprint for the %s key sent by the remote host is\n%s.",
697 error("Please contact your system administrator.");
698 error("Add correct host key in %.100s to get rid of this message.",
700 error("Offending key in %s:%d", host_file, host_line);
704 * If strict host key checking is in use, the user will have
705 * to edit the key manually and we can only abort.
707 if (options.strict_host_key_checking) {
708 error("%s host key for %.200s has changed and you have "
709 "requested strict checking.", type, host);
714 * If strict host key checking has not been requested, allow
715 * the connection but without password authentication or
718 if (options.password_authentication) {
719 error("Password authentication is disabled to avoid "
720 "man-in-the-middle attacks.");
721 options.password_authentication = 0;
723 if (options.forward_agent) {
724 error("Agent forwarding is disabled to avoid "
725 "man-in-the-middle attacks.");
726 options.forward_agent = 0;
728 if (options.forward_x11) {
729 error("X11 forwarding is disabled to avoid "
730 "man-in-the-middle attacks.");
731 options.forward_x11 = 0;
733 if (options.num_local_forwards > 0 ||
734 options.num_remote_forwards > 0) {
735 error("Port forwarding is disabled to avoid "
736 "man-in-the-middle attacks.");
737 options.num_local_forwards =
738 options.num_remote_forwards = 0;
741 * XXX Should permit the user to change to use the new id.
742 * This could be done by converting the host key to an
743 * identifying sentence, tell that the host identifies itself
744 * by that sentence, and ask the user if he/she whishes to
745 * accept the authentication.
749 fatal("internal error");
753 if (options.check_host_ip && host_status != HOST_CHANGED &&
754 ip_status == HOST_CHANGED) {
755 snprintf(msg, sizeof(msg),
756 "Warning: the %s host key for '%.200s' "
757 "differs from the key for the IP address '%.128s'"
758 "\nOffending key for IP in %s:%d",
759 type, host, ip, ip_file, ip_line);
760 if (host_status == HOST_OK) {
762 snprintf(msg + len, sizeof(msg) - len,
763 "\nMatching host key in %s:%d",
764 host_file, host_line);
766 if (options.strict_host_key_checking == 1) {
768 error("Exiting, you have requested strict checking.");
770 } else if (options.strict_host_key_checking == 2) {
771 strlcat(msg, "\nAre you sure you want "
772 "to continue connecting (yes/no)? ", sizeof(msg));
789 verify_host_key(char *host, struct sockaddr *hostaddr, Key *host_key)
793 /* return ok if the key can be found in an old keyfile */
794 if (stat(options.system_hostfile2, &st) == 0 ||
795 stat(options.user_hostfile2, &st) == 0) {
796 if (check_host_key(host, hostaddr, host_key, /*readonly*/ 1,
797 options.user_hostfile2, options.system_hostfile2) == 0)
800 return check_host_key(host, hostaddr, host_key, /*readonly*/ 0,
801 options.user_hostfile, options.system_hostfile);
805 * Starts a dialog with the server, and authenticates the current user on the
806 * server. This does not need any extra privileges. The basic connection
807 * to the server must already have been established before this is called.
808 * If login fails, this function prints an error and never returns.
809 * This function does not require super-user privileges.
812 ssh_login(Sensitive *sensitive, const char *orighost,
813 struct sockaddr *hostaddr, struct passwd *pw)
816 char *server_user, *local_user;
818 local_user = xstrdup(pw->pw_name);
819 server_user = options.user ? options.user : local_user;
821 /* Convert the user-supplied hostname into all lowercase. */
822 host = xstrdup(orighost);
823 for (cp = host; *cp; cp++)
827 /* Exchange protocol version identification strings with the server. */
828 ssh_exchange_identification();
830 /* Put the connection into non-blocking mode. */
831 packet_set_nonblocking();
834 /* authenticate user */
836 ssh_kex2(host, hostaddr);
837 ssh_userauth2(local_user, server_user, host, sensitive);
839 ssh_kex(host, hostaddr);
840 ssh_userauth1(local_user, server_user, host, sensitive);
845 ssh_put_password(char *password)
850 if (datafellows & SSH_BUG_PASSWORDPAD) {
851 packet_put_cstring(password);
854 size = roundup(strlen(password) + 1, 32);
855 padded = xmalloc(size);
856 memset(padded, 0, size);
857 strlcpy(padded, password, size);
858 packet_put_string(padded, size);
859 memset(padded, 0, size);
864 show_key_from_file(const char *file, const char *host, int keytype)
870 found = key_new(keytype);
871 if ((ret = lookup_key_in_hostfile_by_type(file, host,
872 keytype, found, &line))) {
873 fp = key_fingerprint(found, SSH_FP_MD5, SSH_FP_HEX);
874 log("WARNING: %s key found for host %s\n"
876 "%s key fingerprint %s.",
877 key_type(found), host, file, line,
878 key_type(found), fp);
885 /* print all known host keys for a given host, but skip keys of given type */
887 show_other_keys(const char *host, Key *key)
889 int type[] = { KEY_RSA1, KEY_RSA, KEY_DSA, -1};
892 for (i = 0; type[i] != -1; i++) {
893 if (type[i] == key->type)
895 if (type[i] != KEY_RSA1 &&
896 show_key_from_file(options.user_hostfile2, host, type[i])) {
900 if (type[i] != KEY_RSA1 &&
901 show_key_from_file(options.system_hostfile2, host, type[i])) {
905 if (show_key_from_file(options.user_hostfile, host, type[i])) {
909 if (show_key_from_file(options.system_hostfile, host, type[i])) {
913 debug2("no key of type %d for host %s", type[i], host);