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 1.135 2002/09/19 01:58:18 djm Exp $");
17 RCSID("$FreeBSD: src/crypto/openssh/sshconnect.c,v 1.4.2.10 2003/02/03 17:31:08 des Exp $");
18 RCSID("$DragonFly: src/crypto/openssh/Attic/sshconnect.c,v 1.2 2003/06/17 04:24:36 dillon Exp $");
20 #include <openssl/bn.h>
30 #include "sshconnect.h"
38 char *client_version_string = NULL;
39 char *server_version_string = NULL;
42 extern Options options;
43 extern char *__progname;
44 extern uid_t original_real_uid;
45 extern uid_t original_effective_uid;
46 extern pid_t proxy_command_pid;
48 #ifndef INET6_ADDRSTRLEN /* for non IPv6 machines */
49 #define INET6_ADDRSTRLEN 46
52 static int show_other_keys(const char *, Key *);
55 * Connect to the given ssh server using a proxy command.
58 ssh_proxy_connect(const char *host, u_short port, const char *proxy_command)
65 char strport[NI_MAXSERV];
67 /* Convert the port number into a string. */
68 snprintf(strport, sizeof strport, "%hu", port);
71 * Build the final command string in the buffer by making the
72 * appropriate substitutions to the given proxy command.
74 * Use "exec" to avoid "sh -c" processes on some platforms
77 buffer_init(&command);
78 buffer_append(&command, "exec ", 5);
80 for (cp = proxy_command; *cp; cp++) {
81 if (cp[0] == '%' && cp[1] == '%') {
82 buffer_append(&command, "%", 1);
86 if (cp[0] == '%' && cp[1] == 'h') {
87 buffer_append(&command, host, strlen(host));
91 if (cp[0] == '%' && cp[1] == 'p') {
92 buffer_append(&command, strport, strlen(strport));
96 buffer_append(&command, cp, 1);
98 buffer_append(&command, "\0", 1);
100 /* Get the final command string. */
101 command_string = buffer_ptr(&command);
103 /* Create pipes for communicating with the proxy. */
104 if (pipe(pin) < 0 || pipe(pout) < 0)
105 fatal("Could not create pipes to communicate with the proxy: %.100s",
108 debug("Executing proxy command: %.500s", command_string);
110 /* Fork and execute the proxy command. */
111 if ((pid = fork()) == 0) {
114 /* Child. Permanently give up superuser privileges. */
115 seteuid(original_real_uid);
116 setuid(original_real_uid);
118 /* Redirect stdin and stdout. */
121 if (dup2(pin[0], 0) < 0)
122 perror("dup2 stdin");
126 if (dup2(pout[1], 1) < 0)
127 perror("dup2 stdout");
128 /* Cannot be 1 because pin allocated two descriptors. */
131 /* Stderr is left as it is so that error messages get
132 printed on the user's terminal. */
133 argv[0] = _PATH_BSHELL;
135 argv[2] = command_string;
138 /* Execute the proxy command. Note that we gave up any
139 extra privileges above. */
140 execv(argv[0], argv);
146 fatal("fork failed: %.100s", strerror(errno));
148 proxy_command_pid = pid; /* save pid to clean up later */
150 /* Close child side of the descriptors. */
154 /* Free the command name. */
155 buffer_free(&command);
157 /* Set the connection file descriptors. */
158 packet_set_connection(pout[0], pin[1]);
160 /* Indicate OK return */
165 * Creates a (possibly privileged) socket for use as the ssh connection.
168 ssh_create_socket(int privileged, int family)
171 struct addrinfo hints, *res;
174 * If we are running as root and want to connect to a privileged
175 * port, bind our own socket to a privileged port.
178 int p = IPPORT_RESERVED - 1;
180 sock = rresvport_af(&p, family);
183 error("rresvport: af=%d %.100s", family, strerror(errno));
185 debug("Allocated local port %d.", p);
188 sock = socket(family, SOCK_STREAM, 0);
190 error("socket: %.100s", strerror(errno));
192 /* Bind the socket to an alternative local IP address */
193 if (options.bind_address == NULL)
196 memset(&hints, 0, sizeof(hints));
197 hints.ai_family = family;
198 hints.ai_socktype = SOCK_STREAM;
199 hints.ai_flags = AI_PASSIVE;
200 gaierr = getaddrinfo(options.bind_address, "0", &hints, &res);
202 error("getaddrinfo: %s: %s", options.bind_address,
203 gai_strerror(gaierr));
207 if (bind(sock, res->ai_addr, res->ai_addrlen) < 0) {
208 error("bind: %s: %s", options.bind_address, strerror(errno));
218 * Opens a TCP/IP connection to the remote server on the given host.
219 * The address of the remote host will be returned in hostaddr.
220 * If port is 0, the default port will be used. If needpriv is true,
221 * a privileged port will be allocated to make the connection.
222 * This requires super-user privileges if needpriv is true.
223 * Connection_attempts specifies the maximum number of tries (one per
224 * second). If proxy_command is non-NULL, it specifies the command (with %h
225 * and %p substituted for host and port, respectively) to use to contact
229 * ECONNREFUSED if we got a "Connection Refused" by the peer on any address
230 * ECONNABORTED if we failed without a "Connection refused"
231 * Suitable error messages for the connection failure will already have been
235 ssh_connect(const char *host, struct sockaddr_storage * hostaddr,
236 u_short port, int family, int connection_attempts,
237 int needpriv, const char *proxy_command)
241 int sock = -1, attempt;
242 char ntop[NI_MAXHOST], strport[NI_MAXSERV];
243 struct addrinfo hints, *ai, *aitop;
246 * Did we get only other errors than "Connection refused" (which
247 * should block fallback to rsh and similar), or did we get at least
248 * one "Connection refused"?
250 int full_failure = 1;
252 debug("ssh_connect: needpriv %d", needpriv);
254 /* Get default port if port has not been set. */
256 sp = getservbyname(SSH_SERVICE_NAME, "tcp");
258 port = ntohs(sp->s_port);
260 port = SSH_DEFAULT_PORT;
262 /* If a proxy command is given, connect using it. */
263 if (proxy_command != NULL)
264 return ssh_proxy_connect(host, port, proxy_command);
266 /* No proxy command. */
268 memset(&hints, 0, sizeof(hints));
269 hints.ai_family = family;
270 hints.ai_socktype = SOCK_STREAM;
271 snprintf(strport, sizeof strport, "%u", port);
272 if ((gaierr = getaddrinfo(host, strport, &hints, &aitop)) != 0)
273 fatal("%s: %.100s: %s", __progname, host,
274 gai_strerror(gaierr));
277 * Try to connect several times. On some machines, the first time
278 * will sometimes fail. In general socket code appears to behave
279 * quite magically on many machines.
281 for (attempt = 0; ;) {
283 debug("Trying again...");
285 /* Loop through addresses for this host, and try each one in
286 sequence until the connection succeeds. */
287 for (ai = aitop; ai; ai = ai->ai_next) {
288 if (ai->ai_family != AF_INET && ai->ai_family != AF_INET6)
290 if (getnameinfo(ai->ai_addr, ai->ai_addrlen,
291 ntop, sizeof(ntop), strport, sizeof(strport),
292 NI_NUMERICHOST|NI_NUMERICSERV) != 0) {
293 error("ssh_connect: getnameinfo failed");
296 debug("Connecting to %.200s [%.100s] port %s.",
297 host, ntop, strport);
299 /* Create a socket for connecting. */
300 sock = ssh_create_socket(needpriv, ai->ai_family);
302 /* Any error is already output */
305 if (connect(sock, ai->ai_addr, ai->ai_addrlen) >= 0) {
306 /* Successful connection. */
307 memcpy(hostaddr, ai->ai_addr, ai->ai_addrlen);
310 if (errno == ECONNREFUSED)
312 debug("connect to address %s port %s: %s",
313 ntop, strport, strerror(errno));
315 * Close the failed socket; there appear to
316 * be some problems when reusing a socket for
317 * which connect() has already returned an
324 break; /* Successful connection. */
327 if (attempt >= connection_attempts)
329 /* Sleep a moment before retrying. */
335 /* Return failure if we didn't get a successful connection. */
336 if (attempt >= connection_attempts) {
337 log("ssh: connect to host %s port %s: %s",
338 host, strport, strerror(errno));
339 return full_failure ? ECONNABORTED : ECONNREFUSED;
342 debug("Connection established.");
344 /* Set keepalives if requested. */
345 if (options.keepalives &&
346 setsockopt(sock, SOL_SOCKET, SO_KEEPALIVE, (void *)&on,
348 error("setsockopt SO_KEEPALIVE: %.100s", strerror(errno));
350 /* Set the connection. */
351 packet_set_connection(sock, sock);
357 * Waits for the server identification string, and sends our own
358 * identification string.
361 ssh_exchange_identification(void)
363 char buf[256], remote_version[256]; /* must be same size! */
364 int remote_major, remote_minor, i, mismatch;
365 int connection_in = packet_get_connection_in();
366 int connection_out = packet_get_connection_out();
367 int minor1 = PROTOCOL_MINOR_1;
369 /* Read other side\'s version identification. */
371 for (i = 0; i < sizeof(buf) - 1; i++) {
372 int len = atomicio(read, connection_in, &buf[i], 1);
374 fatal("ssh_exchange_identification: read: %.100s", strerror(errno));
376 fatal("ssh_exchange_identification: Connection closed by remote host");
377 if (buf[i] == '\r') {
380 continue; /**XXX wait for \n */
382 if (buf[i] == '\n') {
387 buf[sizeof(buf) - 1] = 0;
388 if (strncmp(buf, "SSH-", 4) == 0)
390 debug("ssh_exchange_identification: %s", buf);
392 server_version_string = xstrdup(buf);
395 * Check that the versions match. In future this might accept
396 * several versions and set appropriate flags to handle them.
398 if (sscanf(server_version_string, "SSH-%d.%d-%[^\n]\n",
399 &remote_major, &remote_minor, remote_version) != 3)
400 fatal("Bad remote protocol version identification: '%.100s'", buf);
401 debug("Remote protocol version %d.%d, remote software version %.100s",
402 remote_major, remote_minor, remote_version);
404 compat_datafellows(remote_version);
407 switch (remote_major) {
409 if (remote_minor == 99 &&
410 (options.protocol & SSH_PROTO_2) &&
411 !(options.protocol & SSH_PROTO_1_PREFERRED)) {
415 if (!(options.protocol & SSH_PROTO_1)) {
419 if (remote_minor < 3) {
420 fatal("Remote machine has too old SSH software version.");
421 } else if (remote_minor == 3 || remote_minor == 4) {
422 /* We speak 1.3, too. */
425 if (options.forward_agent) {
426 log("Agent forwarding disabled for protocol 1.3");
427 options.forward_agent = 0;
432 if (options.protocol & SSH_PROTO_2) {
442 fatal("Protocol major versions differ: %d vs. %d",
443 (options.protocol & SSH_PROTO_2) ? PROTOCOL_MAJOR_2 : PROTOCOL_MAJOR_1,
445 /* Send our own protocol version identification. */
446 snprintf(buf, sizeof buf, "SSH-%d.%d-%.100s\n",
447 compat20 ? PROTOCOL_MAJOR_2 : PROTOCOL_MAJOR_1,
448 compat20 ? PROTOCOL_MINOR_2 : minor1,
450 if (atomicio(write, connection_out, buf, strlen(buf)) != strlen(buf))
451 fatal("write: %.100s", strerror(errno));
452 client_version_string = xstrdup(buf);
453 chop(client_version_string);
454 chop(server_version_string);
455 debug("Local version string %.100s", client_version_string);
458 /* defaults to 'no' */
460 confirm(const char *prompt)
462 const char *msg, *again = "Please type 'yes' or 'no': ";
466 if (options.batch_mode)
468 for (msg = prompt;;msg = again) {
469 p = read_passphrase(msg, RP_ECHO);
471 (p[0] == '\0') || (p[0] == '\n') ||
472 strncasecmp(p, "no", 2) == 0)
474 if (p && strncasecmp(p, "yes", 3) == 0)
484 * check whether the supplied host key is valid, return -1 if the key
485 * is not valid. the user_hostfile will not be updated if 'readonly' is true.
488 check_host_key(char *host, struct sockaddr *hostaddr, Key *host_key,
489 int readonly, const char *user_hostfile, const char *system_hostfile)
492 char *type = key_type(host_key);
494 char hostline[1000], *hostp, *fp;
495 HostStatus host_status;
496 HostStatus ip_status;
497 int local = 0, host_ip_differ = 0;
499 char ntop[NI_MAXHOST];
501 int len, host_line, ip_line, has_keys;
502 const char *host_file = NULL, *ip_file = NULL;
505 * Force accepting of the host key for loopback/localhost. The
506 * problem is that if the home directory is NFS-mounted to multiple
507 * machines, localhost will refer to a different machine in each of
508 * them, and the user will get bogus HOST_CHANGED warnings. This
509 * essentially disables host authentication for localhost; however,
510 * this is probably not a real problem.
512 /** hostaddr == 0! */
513 switch (hostaddr->sa_family) {
515 local = (ntohl(((struct sockaddr_in *)hostaddr)->
516 sin_addr.s_addr) >> 24) == IN_LOOPBACKNET;
517 salen = sizeof(struct sockaddr_in);
520 local = IN6_IS_ADDR_LOOPBACK(
521 &(((struct sockaddr_in6 *)hostaddr)->sin6_addr));
522 salen = sizeof(struct sockaddr_in6);
526 salen = sizeof(struct sockaddr_storage);
529 if (options.no_host_authentication_for_localhost == 1 && local &&
530 options.host_key_alias == NULL) {
531 debug("Forcing accepting of host key for "
532 "loopback/localhost.");
537 * We don't have the remote ip-address for connections
538 * using a proxy command
540 if (options.proxy_command == NULL) {
541 if (getnameinfo(hostaddr, salen, ntop, sizeof(ntop),
542 NULL, 0, NI_NUMERICHOST) != 0)
543 fatal("check_host_key: getnameinfo failed");
546 ip = xstrdup("<no hostip for proxy command>");
549 * Turn off check_host_ip if the connection is to localhost, via proxy
550 * command or if we don't have a hostname to compare with
552 if (options.check_host_ip &&
553 (local || strcmp(host, ip) == 0 || options.proxy_command != NULL))
554 options.check_host_ip = 0;
557 * Allow the user to record the key under a different name. This is
558 * useful for ssh tunneling over forwarded connections or if you run
559 * multiple sshd's on different ports on the same machine.
561 if (options.host_key_alias != NULL) {
562 host = options.host_key_alias;
563 debug("using hostkeyalias: %s", host);
567 * Store the host key from the known host file in here so that we can
568 * compare it with the key for the IP address.
570 file_key = key_new(host_key->type);
573 * Check if the host key is present in the user\'s list of known
574 * hosts or in the systemwide list.
576 host_file = user_hostfile;
577 host_status = check_host_in_hostfile(host_file, host, host_key,
578 file_key, &host_line);
579 if (host_status == HOST_NEW) {
580 host_file = system_hostfile;
581 host_status = check_host_in_hostfile(host_file, host, host_key,
582 file_key, &host_line);
585 * Also perform check for the ip address, skip the check if we are
586 * localhost or the hostname was an ip address to begin with
588 if (options.check_host_ip) {
589 Key *ip_key = key_new(host_key->type);
591 ip_file = user_hostfile;
592 ip_status = check_host_in_hostfile(ip_file, ip, host_key,
594 if (ip_status == HOST_NEW) {
595 ip_file = system_hostfile;
596 ip_status = check_host_in_hostfile(ip_file, ip,
597 host_key, ip_key, &ip_line);
599 if (host_status == HOST_CHANGED &&
600 (ip_status != HOST_CHANGED || !key_equal(ip_key, file_key)))
605 ip_status = host_status;
609 switch (host_status) {
611 /* The host is known and the key matches. */
612 debug("Host '%.200s' is known and matches the %s host key.",
614 debug("Found key in %s:%d", host_file, host_line);
615 if (options.check_host_ip && ip_status == HOST_NEW) {
617 log("%s host key for IP address "
618 "'%.128s' not in list of known hosts.",
620 else if (!add_host_to_hostfile(user_hostfile, ip,
622 log("Failed to add the %s host key for IP "
623 "address '%.128s' to the list of known "
624 "hosts (%.30s).", type, ip, user_hostfile);
626 log("Warning: Permanently added the %s host "
627 "key for IP address '%.128s' to the list "
628 "of known hosts.", type, ip);
634 /* The host is new. */
635 if (options.strict_host_key_checking == 1) {
637 * User has requested strict host key checking. We
638 * will not add the host key automatically. The only
639 * alternative left is to abort.
641 error("No %s host key is known for %.200s and you "
642 "have requested strict checking.", type, host);
644 } else if (options.strict_host_key_checking == 2) {
645 has_keys = show_other_keys(host, host_key);
647 fp = key_fingerprint(host_key, SSH_FP_MD5, SSH_FP_HEX);
648 snprintf(msg, sizeof(msg),
649 "The authenticity of host '%.200s (%s)' can't be "
651 "%s key fingerprint is %s.\n"
652 "Are you sure you want to continue connecting "
655 has_keys ? ",\nbut keys of different type are already "
656 "known for this host." : ".",
662 if (options.check_host_ip && ip_status == HOST_NEW) {
663 snprintf(hostline, sizeof(hostline), "%s,%s", host, ip);
669 * If not in strict mode, add the key automatically to the
670 * local known_hosts file.
672 if (!add_host_to_hostfile(user_hostfile, hostp, host_key))
673 log("Failed to add the host to the list of known "
674 "hosts (%.500s).", user_hostfile);
676 log("Warning: Permanently added '%.200s' (%s) to the "
677 "list of known hosts.", hostp, type);
680 if (options.check_host_ip && host_ip_differ) {
682 if (ip_status == HOST_NEW)
684 else if (ip_status == HOST_OK)
685 msg = "is unchanged";
687 msg = "has a different value";
688 error("@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@");
689 error("@ WARNING: POSSIBLE DNS SPOOFING DETECTED! @");
690 error("@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@");
691 error("The %s host key for %s has changed,", type, host);
692 error("and the key for the according IP address %s", ip);
693 error("%s. This could either mean that", msg);
694 error("DNS SPOOFING is happening or the IP address for the host");
695 error("and its host key have changed at the same time.");
696 if (ip_status != HOST_NEW)
697 error("Offending key for IP in %s:%d", ip_file, ip_line);
699 /* The host key has changed. */
700 fp = key_fingerprint(host_key, SSH_FP_MD5, SSH_FP_HEX);
701 error("@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@");
702 error("@ WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED! @");
703 error("@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@");
704 error("IT IS POSSIBLE THAT SOMEONE IS DOING SOMETHING NASTY!");
705 error("Someone could be eavesdropping on you right now (man-in-the-middle attack)!");
706 error("It is also possible that the %s host key has just been changed.", type);
707 error("The fingerprint for the %s key sent by the remote host is\n%s.",
709 error("Please contact your system administrator.");
710 error("Add correct host key in %.100s to get rid of this message.",
712 error("Offending key in %s:%d", host_file, host_line);
716 * If strict host key checking is in use, the user will have
717 * to edit the key manually and we can only abort.
719 if (options.strict_host_key_checking) {
720 error("%s host key for %.200s has changed and you have "
721 "requested strict checking.", type, host);
726 * If strict host key checking has not been requested, allow
727 * the connection but without password authentication or
730 if (options.password_authentication) {
731 error("Password authentication is disabled to avoid "
732 "man-in-the-middle attacks.");
733 options.password_authentication = 0;
735 if (options.forward_agent) {
736 error("Agent forwarding is disabled to avoid "
737 "man-in-the-middle attacks.");
738 options.forward_agent = 0;
740 if (options.forward_x11) {
741 error("X11 forwarding is disabled to avoid "
742 "man-in-the-middle attacks.");
743 options.forward_x11 = 0;
745 if (options.num_local_forwards > 0 ||
746 options.num_remote_forwards > 0) {
747 error("Port forwarding is disabled to avoid "
748 "man-in-the-middle attacks.");
749 options.num_local_forwards =
750 options.num_remote_forwards = 0;
753 * XXX Should permit the user to change to use the new id.
754 * This could be done by converting the host key to an
755 * identifying sentence, tell that the host identifies itself
756 * by that sentence, and ask the user if he/she whishes to
757 * accept the authentication.
761 fatal("internal error");
765 if (options.check_host_ip && host_status != HOST_CHANGED &&
766 ip_status == HOST_CHANGED) {
767 snprintf(msg, sizeof(msg),
768 "Warning: the %s host key for '%.200s' "
769 "differs from the key for the IP address '%.128s'"
770 "\nOffending key for IP in %s:%d",
771 type, host, ip, ip_file, ip_line);
772 if (host_status == HOST_OK) {
774 snprintf(msg + len, sizeof(msg) - len,
775 "\nMatching host key in %s:%d",
776 host_file, host_line);
778 if (options.strict_host_key_checking == 1) {
780 error("Exiting, you have requested strict checking.");
782 } else if (options.strict_host_key_checking == 2) {
783 strlcat(msg, "\nAre you sure you want "
784 "to continue connecting (yes/no)? ", sizeof(msg));
801 verify_host_key(char *host, struct sockaddr *hostaddr, Key *host_key)
805 /* return ok if the key can be found in an old keyfile */
806 if (stat(options.system_hostfile2, &st) == 0 ||
807 stat(options.user_hostfile2, &st) == 0) {
808 if (check_host_key(host, hostaddr, host_key, /*readonly*/ 1,
809 options.user_hostfile2, options.system_hostfile2) == 0)
812 return check_host_key(host, hostaddr, host_key, /*readonly*/ 0,
813 options.user_hostfile, options.system_hostfile);
817 * Starts a dialog with the server, and authenticates the current user on the
818 * server. This does not need any extra privileges. The basic connection
819 * to the server must already have been established before this is called.
820 * If login fails, this function prints an error and never returns.
821 * This function does not require super-user privileges.
824 ssh_login(Sensitive *sensitive, const char *orighost,
825 struct sockaddr *hostaddr, struct passwd *pw)
828 char *server_user, *local_user;
830 local_user = xstrdup(pw->pw_name);
831 server_user = options.user ? options.user : local_user;
833 /* Convert the user-supplied hostname into all lowercase. */
834 host = xstrdup(orighost);
835 for (cp = host; *cp; cp++)
839 /* Exchange protocol version identification strings with the server. */
840 ssh_exchange_identification();
842 /* Put the connection into non-blocking mode. */
843 packet_set_nonblocking();
846 /* authenticate user */
848 ssh_kex2(host, hostaddr);
849 ssh_userauth2(local_user, server_user, host, sensitive);
851 ssh_kex(host, hostaddr);
852 ssh_userauth1(local_user, server_user, host, sensitive);
857 ssh_put_password(char *password)
862 if (datafellows & SSH_BUG_PASSWORDPAD) {
863 packet_put_cstring(password);
866 size = roundup(strlen(password) + 1, 32);
867 padded = xmalloc(size);
868 memset(padded, 0, size);
869 strlcpy(padded, password, size);
870 packet_put_string(padded, size);
871 memset(padded, 0, size);
876 show_key_from_file(const char *file, const char *host, int keytype)
882 found = key_new(keytype);
883 if ((ret = lookup_key_in_hostfile_by_type(file, host,
884 keytype, found, &line))) {
885 fp = key_fingerprint(found, SSH_FP_MD5, SSH_FP_HEX);
886 log("WARNING: %s key found for host %s\n"
888 "%s key fingerprint %s.",
889 key_type(found), host, file, line,
890 key_type(found), fp);
897 /* print all known host keys for a given host, but skip keys of given type */
899 show_other_keys(const char *host, Key *key)
901 int type[] = { KEY_RSA1, KEY_RSA, KEY_DSA, -1};
904 for (i = 0; type[i] != -1; i++) {
905 if (type[i] == key->type)
907 if (type[i] != KEY_RSA1 &&
908 show_key_from_file(options.user_hostfile2, host, type[i])) {
912 if (type[i] != KEY_RSA1 &&
913 show_key_from_file(options.system_hostfile2, host, type[i])) {
917 if (show_key_from_file(options.user_hostfile, host, type[i])) {
921 if (show_key_from_file(options.system_hostfile, host, type[i])) {
925 debug2("no key of type %d for host %s", type[i], host);