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 1.137 2002/11/21 23:03:51 deraadt 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;
44 extern pid_t proxy_command_pid;
46 #ifndef INET6_ADDRSTRLEN /* for non IPv6 machines */
47 #define INET6_ADDRSTRLEN 46
50 static int show_other_keys(const char *, Key *);
53 * Connect to the given ssh server using a proxy command.
56 ssh_proxy_connect(const char *host, u_short port, const char *proxy_command)
63 char strport[NI_MAXSERV];
65 /* Convert the port number into a string. */
66 snprintf(strport, sizeof strport, "%hu", port);
69 * Build the final command string in the buffer by making the
70 * appropriate substitutions to the given proxy command.
72 * Use "exec" to avoid "sh -c" processes on some platforms
75 buffer_init(&command);
76 buffer_append(&command, "exec ", 5);
78 for (cp = proxy_command; *cp; cp++) {
79 if (cp[0] == '%' && cp[1] == '%') {
80 buffer_append(&command, "%", 1);
84 if (cp[0] == '%' && cp[1] == 'h') {
85 buffer_append(&command, host, strlen(host));
89 if (cp[0] == '%' && cp[1] == 'p') {
90 buffer_append(&command, strport, strlen(strport));
94 buffer_append(&command, cp, 1);
96 buffer_append(&command, "\0", 1);
98 /* Get the final command string. */
99 command_string = buffer_ptr(&command);
101 /* Create pipes for communicating with the proxy. */
102 if (pipe(pin) < 0 || pipe(pout) < 0)
103 fatal("Could not create pipes to communicate with the proxy: %.100s",
106 debug("Executing proxy command: %.500s", command_string);
108 /* Fork and execute the proxy command. */
109 if ((pid = fork()) == 0) {
112 /* Child. Permanently give up superuser privileges. */
113 seteuid(original_real_uid);
114 setuid(original_real_uid);
116 /* Redirect stdin and stdout. */
119 if (dup2(pin[0], 0) < 0)
120 perror("dup2 stdin");
124 if (dup2(pout[1], 1) < 0)
125 perror("dup2 stdout");
126 /* Cannot be 1 because pin allocated two descriptors. */
129 /* Stderr is left as it is so that error messages get
130 printed on the user's terminal. */
131 argv[0] = _PATH_BSHELL;
133 argv[2] = command_string;
136 /* Execute the proxy command. Note that we gave up any
137 extra privileges above. */
138 execv(argv[0], argv);
144 fatal("fork failed: %.100s", strerror(errno));
146 proxy_command_pid = pid; /* save pid to clean up later */
148 /* Close child side of the descriptors. */
152 /* Free the command name. */
153 buffer_free(&command);
155 /* Set the connection file descriptors. */
156 packet_set_connection(pout[0], pin[1]);
158 /* Indicate OK return */
163 * Creates a (possibly privileged) socket for use as the ssh connection.
166 ssh_create_socket(int privileged, int family)
169 struct addrinfo hints, *res;
172 * If we are running as root and want to connect to a privileged
173 * port, bind our own socket to a privileged port.
176 int p = IPPORT_RESERVED - 1;
178 sock = rresvport_af(&p, family);
181 error("rresvport: af=%d %.100s", family, strerror(errno));
183 debug("Allocated local port %d.", p);
186 sock = socket(family, SOCK_STREAM, 0);
188 error("socket: %.100s", strerror(errno));
190 /* Bind the socket to an alternative local IP address */
191 if (options.bind_address == NULL)
194 memset(&hints, 0, sizeof(hints));
195 hints.ai_family = family;
196 hints.ai_socktype = SOCK_STREAM;
197 hints.ai_flags = AI_PASSIVE;
198 gaierr = getaddrinfo(options.bind_address, "0", &hints, &res);
200 error("getaddrinfo: %s: %s", options.bind_address,
201 gai_strerror(gaierr));
205 if (bind(sock, res->ai_addr, res->ai_addrlen) < 0) {
206 error("bind: %s: %s", options.bind_address, strerror(errno));
216 * Opens a TCP/IP connection to the remote server on the given host.
217 * The address of the remote host will be returned in hostaddr.
218 * If port is 0, the default port will be used. If needpriv is true,
219 * a privileged port will be allocated to make the connection.
220 * This requires super-user privileges if needpriv is true.
221 * Connection_attempts specifies the maximum number of tries (one per
222 * second). If proxy_command is non-NULL, it specifies the command (with %h
223 * and %p substituted for host and port, respectively) to use to contact
227 * ECONNREFUSED if we got a "Connection Refused" by the peer on any address
228 * ECONNABORTED if we failed without a "Connection refused"
229 * Suitable error messages for the connection failure will already have been
233 ssh_connect(const char *host, struct sockaddr_storage * hostaddr,
234 u_short port, int family, int connection_attempts,
235 int needpriv, const char *proxy_command)
239 int sock = -1, attempt;
240 char ntop[NI_MAXHOST], strport[NI_MAXSERV];
241 struct addrinfo hints, *ai, *aitop;
244 * Did we get only other errors than "Connection refused" (which
245 * should block fallback to rsh and similar), or did we get at least
246 * one "Connection refused"?
248 int full_failure = 1;
250 debug2("ssh_connect: needpriv %d", needpriv);
252 /* Get default port if port has not been set. */
254 sp = getservbyname(SSH_SERVICE_NAME, "tcp");
256 port = ntohs(sp->s_port);
258 port = SSH_DEFAULT_PORT;
260 /* If a proxy command is given, connect using it. */
261 if (proxy_command != NULL)
262 return ssh_proxy_connect(host, port, proxy_command);
264 /* No proxy command. */
266 memset(&hints, 0, sizeof(hints));
267 hints.ai_family = family;
268 hints.ai_socktype = SOCK_STREAM;
269 snprintf(strport, sizeof strport, "%u", port);
270 if ((gaierr = getaddrinfo(host, strport, &hints, &aitop)) != 0)
271 fatal("%s: %.100s: %s", __progname, host,
272 gai_strerror(gaierr));
275 * Try to connect several times. On some machines, the first time
276 * will sometimes fail. In general socket code appears to behave
277 * quite magically on many machines.
279 for (attempt = 0; ;) {
281 debug("Trying again...");
283 /* Loop through addresses for this host, and try each one in
284 sequence until the connection succeeds. */
285 for (ai = aitop; ai; ai = ai->ai_next) {
286 if (ai->ai_family != AF_INET && ai->ai_family != AF_INET6)
288 if (getnameinfo(ai->ai_addr, ai->ai_addrlen,
289 ntop, sizeof(ntop), strport, sizeof(strport),
290 NI_NUMERICHOST|NI_NUMERICSERV) != 0) {
291 error("ssh_connect: getnameinfo failed");
294 debug("Connecting to %.200s [%.100s] port %s.",
295 host, ntop, strport);
297 /* Create a socket for connecting. */
298 sock = ssh_create_socket(needpriv, ai->ai_family);
300 /* Any error is already output */
303 if (connect(sock, ai->ai_addr, ai->ai_addrlen) >= 0) {
304 /* Successful connection. */
305 memcpy(hostaddr, ai->ai_addr, ai->ai_addrlen);
308 if (errno == ECONNREFUSED)
310 debug("connect to address %s port %s: %s",
311 ntop, strport, strerror(errno));
313 * Close the failed socket; there appear to
314 * be some problems when reusing a socket for
315 * which connect() has already returned an
322 break; /* Successful connection. */
325 if (attempt >= connection_attempts)
327 /* Sleep a moment before retrying. */
333 /* Return failure if we didn't get a successful connection. */
334 if (attempt >= connection_attempts) {
335 log("ssh: connect to host %s port %s: %s",
336 host, strport, strerror(errno));
337 return full_failure ? ECONNABORTED : ECONNREFUSED;
340 debug("Connection established.");
342 /* Set keepalives if requested. */
343 if (options.keepalives &&
344 setsockopt(sock, SOL_SOCKET, SO_KEEPALIVE, (void *)&on,
346 error("setsockopt SO_KEEPALIVE: %.100s", strerror(errno));
348 /* Set the connection. */
349 packet_set_connection(sock, sock);
355 * Waits for the server identification string, and sends our own
356 * identification string.
359 ssh_exchange_identification(void)
361 char buf[256], remote_version[256]; /* must be same size! */
362 int remote_major, remote_minor, i, mismatch;
363 int connection_in = packet_get_connection_in();
364 int connection_out = packet_get_connection_out();
365 int minor1 = PROTOCOL_MINOR_1;
367 /* Read other side\'s version identification. */
369 for (i = 0; i < sizeof(buf) - 1; i++) {
370 int len = atomicio(read, connection_in, &buf[i], 1);
372 fatal("ssh_exchange_identification: read: %.100s", strerror(errno));
374 fatal("ssh_exchange_identification: Connection closed by remote host");
375 if (buf[i] == '\r') {
378 continue; /**XXX wait for \n */
380 if (buf[i] == '\n') {
385 buf[sizeof(buf) - 1] = 0;
386 if (strncmp(buf, "SSH-", 4) == 0)
388 debug("ssh_exchange_identification: %s", buf);
390 server_version_string = xstrdup(buf);
393 * Check that the versions match. In future this might accept
394 * several versions and set appropriate flags to handle them.
396 if (sscanf(server_version_string, "SSH-%d.%d-%[^\n]\n",
397 &remote_major, &remote_minor, remote_version) != 3)
398 fatal("Bad remote protocol version identification: '%.100s'", buf);
399 debug("Remote protocol version %d.%d, remote software version %.100s",
400 remote_major, remote_minor, remote_version);
402 compat_datafellows(remote_version);
405 switch (remote_major) {
407 if (remote_minor == 99 &&
408 (options.protocol & SSH_PROTO_2) &&
409 !(options.protocol & SSH_PROTO_1_PREFERRED)) {
413 if (!(options.protocol & SSH_PROTO_1)) {
417 if (remote_minor < 3) {
418 fatal("Remote machine has too old SSH software version.");
419 } else if (remote_minor == 3 || remote_minor == 4) {
420 /* We speak 1.3, too. */
423 if (options.forward_agent) {
424 log("Agent forwarding disabled for protocol 1.3");
425 options.forward_agent = 0;
430 if (options.protocol & SSH_PROTO_2) {
440 fatal("Protocol major versions differ: %d vs. %d",
441 (options.protocol & SSH_PROTO_2) ? PROTOCOL_MAJOR_2 : PROTOCOL_MAJOR_1,
443 /* Send our own protocol version identification. */
444 snprintf(buf, sizeof buf, "SSH-%d.%d-%.100s\n",
445 compat20 ? PROTOCOL_MAJOR_2 : PROTOCOL_MAJOR_1,
446 compat20 ? PROTOCOL_MINOR_2 : minor1,
448 if (atomicio(write, connection_out, buf, strlen(buf)) != strlen(buf))
449 fatal("write: %.100s", strerror(errno));
450 client_version_string = xstrdup(buf);
451 chop(client_version_string);
452 chop(server_version_string);
453 debug("Local version string %.100s", client_version_string);
456 /* defaults to 'no' */
458 confirm(const char *prompt)
460 const char *msg, *again = "Please type 'yes' or 'no': ";
464 if (options.batch_mode)
466 for (msg = prompt;;msg = again) {
467 p = read_passphrase(msg, RP_ECHO);
469 (p[0] == '\0') || (p[0] == '\n') ||
470 strncasecmp(p, "no", 2) == 0)
472 if (p && strncasecmp(p, "yes", 3) == 0)
482 * check whether the supplied host key is valid, return -1 if the key
483 * is not valid. the user_hostfile will not be updated if 'readonly' is true.
486 check_host_key(char *host, struct sockaddr *hostaddr, Key *host_key,
487 int readonly, const char *user_hostfile, const char *system_hostfile)
490 char *type = key_type(host_key);
492 char hostline[1000], *hostp, *fp;
493 HostStatus host_status;
494 HostStatus ip_status;
495 int local = 0, host_ip_differ = 0;
497 char ntop[NI_MAXHOST];
499 int len, host_line, ip_line, has_keys;
500 const char *host_file = NULL, *ip_file = NULL;
503 * Force accepting of the host key for loopback/localhost. The
504 * problem is that if the home directory is NFS-mounted to multiple
505 * machines, localhost will refer to a different machine in each of
506 * them, and the user will get bogus HOST_CHANGED warnings. This
507 * essentially disables host authentication for localhost; however,
508 * this is probably not a real problem.
510 /** hostaddr == 0! */
511 switch (hostaddr->sa_family) {
513 local = (ntohl(((struct sockaddr_in *)hostaddr)->
514 sin_addr.s_addr) >> 24) == IN_LOOPBACKNET;
515 salen = sizeof(struct sockaddr_in);
518 local = IN6_IS_ADDR_LOOPBACK(
519 &(((struct sockaddr_in6 *)hostaddr)->sin6_addr));
520 salen = sizeof(struct sockaddr_in6);
524 salen = sizeof(struct sockaddr_storage);
527 if (options.no_host_authentication_for_localhost == 1 && local &&
528 options.host_key_alias == NULL) {
529 debug("Forcing accepting of host key for "
530 "loopback/localhost.");
535 * We don't have the remote ip-address for connections
536 * using a proxy command
538 if (options.proxy_command == NULL) {
539 if (getnameinfo(hostaddr, salen, ntop, sizeof(ntop),
540 NULL, 0, NI_NUMERICHOST) != 0)
541 fatal("check_host_key: getnameinfo failed");
544 ip = xstrdup("<no hostip for proxy command>");
547 * Turn off check_host_ip if the connection is to localhost, via proxy
548 * command or if we don't have a hostname to compare with
550 if (options.check_host_ip &&
551 (local || strcmp(host, ip) == 0 || options.proxy_command != NULL))
552 options.check_host_ip = 0;
555 * Allow the user to record the key under a different name. This is
556 * useful for ssh tunneling over forwarded connections or if you run
557 * multiple sshd's on different ports on the same machine.
559 if (options.host_key_alias != NULL) {
560 host = options.host_key_alias;
561 debug("using hostkeyalias: %s", host);
565 * Store the host key from the known host file in here so that we can
566 * compare it with the key for the IP address.
568 file_key = key_new(host_key->type);
571 * Check if the host key is present in the user\'s list of known
572 * hosts or in the systemwide list.
574 host_file = user_hostfile;
575 host_status = check_host_in_hostfile(host_file, host, host_key,
576 file_key, &host_line);
577 if (host_status == HOST_NEW) {
578 host_file = system_hostfile;
579 host_status = check_host_in_hostfile(host_file, host, host_key,
580 file_key, &host_line);
583 * Also perform check for the ip address, skip the check if we are
584 * localhost or the hostname was an ip address to begin with
586 if (options.check_host_ip) {
587 Key *ip_key = key_new(host_key->type);
589 ip_file = user_hostfile;
590 ip_status = check_host_in_hostfile(ip_file, ip, host_key,
592 if (ip_status == HOST_NEW) {
593 ip_file = system_hostfile;
594 ip_status = check_host_in_hostfile(ip_file, ip,
595 host_key, ip_key, &ip_line);
597 if (host_status == HOST_CHANGED &&
598 (ip_status != HOST_CHANGED || !key_equal(ip_key, file_key)))
603 ip_status = host_status;
607 switch (host_status) {
609 /* The host is known and the key matches. */
610 debug("Host '%.200s' is known and matches the %s host key.",
612 debug("Found key in %s:%d", host_file, host_line);
613 if (options.check_host_ip && ip_status == HOST_NEW) {
615 log("%s host key for IP address "
616 "'%.128s' not in list of known hosts.",
618 else if (!add_host_to_hostfile(user_hostfile, ip,
620 log("Failed to add the %s host key for IP "
621 "address '%.128s' to the list of known "
622 "hosts (%.30s).", type, ip, user_hostfile);
624 log("Warning: Permanently added the %s host "
625 "key for IP address '%.128s' to the list "
626 "of known hosts.", type, ip);
632 /* The host is new. */
633 if (options.strict_host_key_checking == 1) {
635 * User has requested strict host key checking. We
636 * will not add the host key automatically. The only
637 * alternative left is to abort.
639 error("No %s host key is known for %.200s and you "
640 "have requested strict checking.", type, host);
642 } else if (options.strict_host_key_checking == 2) {
643 has_keys = show_other_keys(host, host_key);
645 fp = key_fingerprint(host_key, SSH_FP_MD5, SSH_FP_HEX);
646 snprintf(msg, sizeof(msg),
647 "The authenticity of host '%.200s (%s)' can't be "
649 "%s key fingerprint is %s.\n"
650 "Are you sure you want to continue connecting "
653 has_keys ? ",\nbut keys of different type are already "
654 "known for this host." : ".",
660 if (options.check_host_ip && ip_status == HOST_NEW) {
661 snprintf(hostline, sizeof(hostline), "%s,%s", host, ip);
667 * If not in strict mode, add the key automatically to the
668 * local known_hosts file.
670 if (!add_host_to_hostfile(user_hostfile, hostp, host_key))
671 log("Failed to add the host to the list of known "
672 "hosts (%.500s).", user_hostfile);
674 log("Warning: Permanently added '%.200s' (%s) to the "
675 "list of known hosts.", hostp, type);
678 if (options.check_host_ip && host_ip_differ) {
680 if (ip_status == HOST_NEW)
682 else if (ip_status == HOST_OK)
683 msg = "is unchanged";
685 msg = "has a different value";
686 error("@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@");
687 error("@ WARNING: POSSIBLE DNS SPOOFING DETECTED! @");
688 error("@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@");
689 error("The %s host key for %s has changed,", type, host);
690 error("and the key for the according IP address %s", ip);
691 error("%s. This could either mean that", msg);
692 error("DNS SPOOFING is happening or the IP address for the host");
693 error("and its host key have changed at the same time.");
694 if (ip_status != HOST_NEW)
695 error("Offending key for IP in %s:%d", ip_file, ip_line);
697 /* The host key has changed. */
698 fp = key_fingerprint(host_key, SSH_FP_MD5, SSH_FP_HEX);
699 error("@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@");
700 error("@ WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED! @");
701 error("@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@");
702 error("IT IS POSSIBLE THAT SOMEONE IS DOING SOMETHING NASTY!");
703 error("Someone could be eavesdropping on you right now (man-in-the-middle attack)!");
704 error("It is also possible that the %s host key has just been changed.", type);
705 error("The fingerprint for the %s key sent by the remote host is\n%s.",
707 error("Please contact your system administrator.");
708 error("Add correct host key in %.100s to get rid of this message.",
710 error("Offending key in %s:%d", host_file, host_line);
714 * If strict host key checking is in use, the user will have
715 * to edit the key manually and we can only abort.
717 if (options.strict_host_key_checking) {
718 error("%s host key for %.200s has changed and you have "
719 "requested strict checking.", type, host);
724 * If strict host key checking has not been requested, allow
725 * the connection but without password authentication or
728 if (options.password_authentication) {
729 error("Password authentication is disabled to avoid "
730 "man-in-the-middle attacks.");
731 options.password_authentication = 0;
733 if (options.forward_agent) {
734 error("Agent forwarding is disabled to avoid "
735 "man-in-the-middle attacks.");
736 options.forward_agent = 0;
738 if (options.forward_x11) {
739 error("X11 forwarding is disabled to avoid "
740 "man-in-the-middle attacks.");
741 options.forward_x11 = 0;
743 if (options.num_local_forwards > 0 ||
744 options.num_remote_forwards > 0) {
745 error("Port forwarding is disabled to avoid "
746 "man-in-the-middle attacks.");
747 options.num_local_forwards =
748 options.num_remote_forwards = 0;
751 * XXX Should permit the user to change to use the new id.
752 * This could be done by converting the host key to an
753 * identifying sentence, tell that the host identifies itself
754 * by that sentence, and ask the user if he/she whishes to
755 * accept the authentication.
759 fatal("internal error");
763 if (options.check_host_ip && host_status != HOST_CHANGED &&
764 ip_status == HOST_CHANGED) {
765 snprintf(msg, sizeof(msg),
766 "Warning: the %s host key for '%.200s' "
767 "differs from the key for the IP address '%.128s'"
768 "\nOffending key for IP in %s:%d",
769 type, host, ip, ip_file, ip_line);
770 if (host_status == HOST_OK) {
772 snprintf(msg + len, sizeof(msg) - len,
773 "\nMatching host key in %s:%d",
774 host_file, host_line);
776 if (options.strict_host_key_checking == 1) {
778 error("Exiting, you have requested strict checking.");
780 } else if (options.strict_host_key_checking == 2) {
781 strlcat(msg, "\nAre you sure you want "
782 "to continue connecting (yes/no)? ", sizeof(msg));
799 verify_host_key(char *host, struct sockaddr *hostaddr, Key *host_key)
803 /* return ok if the key can be found in an old keyfile */
804 if (stat(options.system_hostfile2, &st) == 0 ||
805 stat(options.user_hostfile2, &st) == 0) {
806 if (check_host_key(host, hostaddr, host_key, /*readonly*/ 1,
807 options.user_hostfile2, options.system_hostfile2) == 0)
810 return check_host_key(host, hostaddr, host_key, /*readonly*/ 0,
811 options.user_hostfile, options.system_hostfile);
815 * Starts a dialog with the server, and authenticates the current user on the
816 * server. This does not need any extra privileges. The basic connection
817 * to the server must already have been established before this is called.
818 * If login fails, this function prints an error and never returns.
819 * This function does not require super-user privileges.
822 ssh_login(Sensitive *sensitive, const char *orighost,
823 struct sockaddr *hostaddr, struct passwd *pw)
826 char *server_user, *local_user;
828 local_user = xstrdup(pw->pw_name);
829 server_user = options.user ? options.user : local_user;
831 /* Convert the user-supplied hostname into all lowercase. */
832 host = xstrdup(orighost);
833 for (cp = host; *cp; cp++)
837 /* Exchange protocol version identification strings with the server. */
838 ssh_exchange_identification();
840 /* Put the connection into non-blocking mode. */
841 packet_set_nonblocking();
844 /* authenticate user */
846 ssh_kex2(host, hostaddr);
847 ssh_userauth2(local_user, server_user, host, sensitive);
849 ssh_kex(host, hostaddr);
850 ssh_userauth1(local_user, server_user, host, sensitive);
855 ssh_put_password(char *password)
860 if (datafellows & SSH_BUG_PASSWORDPAD) {
861 packet_put_cstring(password);
864 size = roundup(strlen(password) + 1, 32);
865 padded = xmalloc(size);
866 memset(padded, 0, size);
867 strlcpy(padded, password, size);
868 packet_put_string(padded, size);
869 memset(padded, 0, size);
874 show_key_from_file(const char *file, const char *host, int keytype)
880 found = key_new(keytype);
881 if ((ret = lookup_key_in_hostfile_by_type(file, host,
882 keytype, found, &line))) {
883 fp = key_fingerprint(found, SSH_FP_MD5, SSH_FP_HEX);
884 log("WARNING: %s key found for host %s\n"
886 "%s key fingerprint %s.",
887 key_type(found), host, file, line,
888 key_type(found), fp);
895 /* print all known host keys for a given host, but skip keys of given type */
897 show_other_keys(const char *host, Key *key)
899 int type[] = { KEY_RSA1, KEY_RSA, KEY_DSA, -1};
902 for (i = 0; type[i] != -1; i++) {
903 if (type[i] == key->type)
905 if (type[i] != KEY_RSA1 &&
906 show_key_from_file(options.user_hostfile2, host, type[i])) {
910 if (type[i] != KEY_RSA1 &&
911 show_key_from_file(options.system_hostfile2, host, type[i])) {
915 if (show_key_from_file(options.user_hostfile, host, type[i])) {
919 if (show_key_from_file(options.system_hostfile, host, type[i])) {
923 debug2("no key of type %d for host %s", type[i], host);