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djm@openbsd.org0e8eeec2016-05-02 10:26:04 +00001/* $OpenBSD: ssh-keyscan.c,v 1.106 2016/05/02 10:26:04 djm Exp $ */
Ben Lindstromb6434ae2000-12-05 01:15:09 +00002/*
3 * Copyright 1995, 1996 by David Mazieres <dm@lcs.mit.edu>.
4 *
5 * Modification and redistribution in source and binary forms is
6 * permitted provided that due credit is given to the author and the
Ben Lindstroma238f6e2001-06-09 01:30:39 +00007 * OpenBSD project by leaving this copyright notice intact.
Ben Lindstromb6434ae2000-12-05 01:15:09 +00008 */
9
10#include "includes.h"
Damien Millercd4223c2006-03-15 11:22:47 +110011
djm@openbsd.org48b68ce2014-12-11 08:20:09 +000012#include <sys/types.h>
Damien Miller9b481512002-09-12 10:43:29 +100013#include "openbsd-compat/sys-queue.h"
Damien Millercd4223c2006-03-15 11:22:47 +110014#include <sys/resource.h>
Damien Miller9aec9192006-08-05 10:57:45 +100015#ifdef HAVE_SYS_TIME_H
16# include <sys/time.h>
17#endif
Damien Millere3476ed2006-07-24 14:13:33 +100018
Darren Tucker46aa3e02006-09-02 15:32:40 +100019#include <netinet/in.h>
20#include <arpa/inet.h>
21
Damien Millere3476ed2006-07-24 14:13:33 +100022#include <openssl/bn.h>
23
Damien Millerb8fe89c2006-07-24 14:51:00 +100024#include <netdb.h>
Darren Tuckerdeecec92006-07-12 22:44:34 +100025#include <errno.h>
Damien Millere7a1e5c2006-08-05 11:34:19 +100026#include <stdarg.h>
Damien Millera7a73ee2006-08-05 11:37:59 +100027#include <stdio.h>
Damien Millere7a1e5c2006-08-05 11:34:19 +100028#include <stdlib.h>
Damien Millerd7834352006-08-05 12:39:39 +100029#include <signal.h>
Damien Millere3476ed2006-07-24 14:13:33 +100030#include <string.h>
Damien Millere6b3b612006-07-24 14:01:23 +100031#include <unistd.h>
Ben Lindstromb6434ae2000-12-05 01:15:09 +000032
Ben Lindstromb6434ae2000-12-05 01:15:09 +000033#include "xmalloc.h"
34#include "ssh.h"
Ben Lindstrom226cfa02001-01-22 05:34:40 +000035#include "ssh1.h"
markus@openbsd.org3f797652015-01-19 20:32:39 +000036#include "sshbuf.h"
37#include "sshkey.h"
Damien Millerd7834352006-08-05 12:39:39 +100038#include "cipher.h"
Ben Lindstrom325e70c2001-08-06 22:41:30 +000039#include "kex.h"
40#include "compat.h"
41#include "myproposal.h"
42#include "packet.h"
43#include "dispatch.h"
Ben Lindstrom226cfa02001-01-22 05:34:40 +000044#include "log.h"
Ben Lindstromd20b8552001-03-05 07:01:18 +000045#include "atomicio.h"
Ben Lindstrom325e70c2001-08-06 22:41:30 +000046#include "misc.h"
Damien Millerdb7b8172005-03-01 21:48:03 +110047#include "hostfile.h"
markus@openbsd.org3f797652015-01-19 20:32:39 +000048#include "ssherr.h"
49#include "ssh_api.h"
Ben Lindstromb6434ae2000-12-05 01:15:09 +000050
Ben Lindstrom325e70c2001-08-06 22:41:30 +000051/* Flag indicating whether IPv4 or IPv6. This can be set on the command line.
52 Default value is AF_UNSPEC means both IPv4 and IPv6. */
Ben Lindstrom325e70c2001-08-06 22:41:30 +000053int IPv4or6 = AF_UNSPEC;
Ben Lindstromb6434ae2000-12-05 01:15:09 +000054
Ben Lindstrom325e70c2001-08-06 22:41:30 +000055int ssh_port = SSH_DEFAULT_PORT;
Kevin Steves76e7d9b2001-09-20 20:30:09 +000056
Damien Millereb8b60e2010-08-31 22:41:14 +100057#define KT_RSA1 1
58#define KT_DSA 2
59#define KT_RSA 4
60#define KT_ECDSA 8
Damien Miller5be9d9e2013-12-07 11:24:01 +110061#define KT_ED25519 16
Kevin Steves76e7d9b2001-09-20 20:30:09 +000062
djm@openbsd.org3a424cd2015-11-08 22:30:20 +000063int get_cert = 0;
Damien Miller1c7ef4b2014-04-20 12:59:46 +100064int get_keytypes = KT_RSA|KT_ECDSA|KT_ED25519;
Ben Lindstromb6434ae2000-12-05 01:15:09 +000065
Damien Millerdb7b8172005-03-01 21:48:03 +110066int hash_hosts = 0; /* Hash hostname on output */
67
Ben Lindstromb6434ae2000-12-05 01:15:09 +000068#define MAXMAXFD 256
69
70/* The number of seconds after which to give up on a TCP connection */
71int timeout = 5;
72
73int maxfd;
Ben Lindstromd20b8552001-03-05 07:01:18 +000074#define MAXCON (maxfd - 10)
Ben Lindstromb6434ae2000-12-05 01:15:09 +000075
Kevin Stevesec84dc12000-12-13 17:45:15 +000076extern char *__progname;
Ben Lindstromc1e04212001-03-05 07:04:38 +000077fd_set *read_wait;
Damien Miller07d86be2006-03-26 14:19:21 +110078size_t read_wait_nfdset;
Ben Lindstromb6434ae2000-12-05 01:15:09 +000079int ncon;
80
Damien Millerade31d72015-01-27 23:06:23 +110081struct ssh *active_state = NULL; /* XXX needed for linking */
82
Ben Lindstromb6434ae2000-12-05 01:15:09 +000083/*
84 * Keep a connection structure for each file descriptor. The state
85 * associated with file descriptor n is held in fdcon[n].
86 */
87typedef struct Connection {
Ben Lindstrom46c16222000-12-22 01:43:59 +000088 u_char c_status; /* State of connection on this file desc. */
Ben Lindstromb6434ae2000-12-05 01:15:09 +000089#define CS_UNUSED 0 /* File descriptor unused */
90#define CS_CON 1 /* Waiting to connect/read greeting */
91#define CS_SIZE 2 /* Waiting to read initial packet size */
92#define CS_KEYS 3 /* Waiting to read public key packet */
93 int c_fd; /* Quick lookup: c->c_fd == c - fdcon */
94 int c_plen; /* Packet length field for ssh packet */
95 int c_len; /* Total bytes which must be read. */
96 int c_off; /* Length of data read so far. */
Ben Lindstrom325e70c2001-08-06 22:41:30 +000097 int c_keytype; /* Only one of KT_RSA1, KT_DSA, or KT_RSA */
miod@openbsd.orgc265e2e2015-04-05 15:43:43 +000098 sig_atomic_t c_done; /* SSH2 done */
Ben Lindstromb6434ae2000-12-05 01:15:09 +000099 char *c_namebase; /* Address to free for c_name and c_namelist */
100 char *c_name; /* Hostname of connection for errors */
101 char *c_namelist; /* Pointer to other possible addresses */
102 char *c_output_name; /* Hostname of connection for output */
103 char *c_data; /* Data read from this fd */
markus@openbsd.org3f797652015-01-19 20:32:39 +0000104 struct ssh *c_ssh; /* SSH-connection */
Ben Lindstromb6434ae2000-12-05 01:15:09 +0000105 struct timeval c_tv; /* Time at which connection gets aborted */
106 TAILQ_ENTRY(Connection) c_link; /* List of connections in timeout order. */
107} con;
108
109TAILQ_HEAD(conlist, Connection) tq; /* Timeout Queue */
110con *fdcon;
111
markus@openbsd.org3f797652015-01-19 20:32:39 +0000112static void keyprint(con *c, struct sshkey *key);
113
Ben Lindstrombba81212001-06-25 05:01:22 +0000114static int
Ben Lindstromb6434ae2000-12-05 01:15:09 +0000115fdlim_get(int hard)
116{
Ben Lindstrom5adbad22000-12-27 07:06:21 +0000117#if defined(HAVE_GETRLIMIT) && defined(RLIMIT_NOFILE)
Ben Lindstromb6434ae2000-12-05 01:15:09 +0000118 struct rlimit rlfd;
Ben Lindstromb0a4cd82001-03-05 04:54:49 +0000119
Ben Lindstromb6434ae2000-12-05 01:15:09 +0000120 if (getrlimit(RLIMIT_NOFILE, &rlfd) < 0)
121 return (-1);
122 if ((hard ? rlfd.rlim_max : rlfd.rlim_cur) == RLIM_INFINITY)
Damien Millere00074a2003-11-24 13:07:45 +1100123 return SSH_SYSFDMAX;
Ben Lindstromb6434ae2000-12-05 01:15:09 +0000124 else
125 return hard ? rlfd.rlim_max : rlfd.rlim_cur;
Ben Lindstrom2c467a22000-12-27 04:57:41 +0000126#else
Damien Millere00074a2003-11-24 13:07:45 +1100127 return SSH_SYSFDMAX;
Ben Lindstrom2c467a22000-12-27 04:57:41 +0000128#endif
Ben Lindstromb6434ae2000-12-05 01:15:09 +0000129}
130
Ben Lindstrombba81212001-06-25 05:01:22 +0000131static int
Ben Lindstromb6434ae2000-12-05 01:15:09 +0000132fdlim_set(int lim)
133{
Ben Lindstrom5adbad22000-12-27 07:06:21 +0000134#if defined(HAVE_SETRLIMIT) && defined(RLIMIT_NOFILE)
Ben Lindstromb6434ae2000-12-05 01:15:09 +0000135 struct rlimit rlfd;
Ben Lindstrom2c467a22000-12-27 04:57:41 +0000136#endif
Ben Lindstrom5c98db52002-07-07 22:25:29 +0000137
Ben Lindstromb6434ae2000-12-05 01:15:09 +0000138 if (lim <= 0)
139 return (-1);
Ben Lindstrom5adbad22000-12-27 07:06:21 +0000140#if defined(HAVE_SETRLIMIT) && defined(RLIMIT_NOFILE)
Ben Lindstromb6434ae2000-12-05 01:15:09 +0000141 if (getrlimit(RLIMIT_NOFILE, &rlfd) < 0)
142 return (-1);
143 rlfd.rlim_cur = lim;
144 if (setrlimit(RLIMIT_NOFILE, &rlfd) < 0)
145 return (-1);
Ben Lindstrom2c467a22000-12-27 04:57:41 +0000146#elif defined (HAVE_SETDTABLESIZE)
Kevin Steves28a7f262001-02-05 15:43:59 +0000147 setdtablesize(lim);
Ben Lindstrom2c467a22000-12-27 04:57:41 +0000148#endif
Ben Lindstromb6434ae2000-12-05 01:15:09 +0000149 return (0);
150}
151
152/*
153 * This is an strsep function that returns a null field for adjacent
154 * separators. This is the same as the 4.4BSD strsep, but different from the
155 * one in the GNU libc.
156 */
Ben Lindstrombba81212001-06-25 05:01:22 +0000157static char *
Ben Lindstromb6434ae2000-12-05 01:15:09 +0000158xstrsep(char **str, const char *delim)
159{
160 char *s, *e;
161
162 if (!**str)
163 return (NULL);
164
165 s = *str;
166 e = s + strcspn(s, delim);
167
168 if (*e != '\0')
169 *e++ = '\0';
170 *str = e;
171
172 return (s);
173}
174
175/*
176 * Get the next non-null token (like GNU strsep). Strsep() will return a
177 * null token for two adjacent separators, so we may have to loop.
178 */
Ben Lindstrombba81212001-06-25 05:01:22 +0000179static char *
Ben Lindstromb6434ae2000-12-05 01:15:09 +0000180strnnsep(char **stringp, char *delim)
181{
182 char *tok;
183
184 do {
185 tok = xstrsep(stringp, delim);
186 } while (tok && *tok == '\0');
187 return (tok);
188}
189
Damien Miller1f0311c2014-05-15 14:24:09 +1000190#ifdef WITH_SSH1
markus@openbsd.org3f797652015-01-19 20:32:39 +0000191static struct sshkey *
Ben Lindstrom325e70c2001-08-06 22:41:30 +0000192keygrab_ssh1(con *c)
Ben Lindstromb6434ae2000-12-05 01:15:09 +0000193{
markus@openbsd.org3f797652015-01-19 20:32:39 +0000194 static struct sshkey *rsa;
195 static struct sshbuf *msg;
196 int r;
197 u_char type;
Ben Lindstromb6434ae2000-12-05 01:15:09 +0000198
199 if (rsa == NULL) {
markus@openbsd.org3f797652015-01-19 20:32:39 +0000200 if ((rsa = sshkey_new(KEY_RSA1)) == NULL) {
201 error("%s: sshkey_new failed", __func__);
202 return NULL;
203 }
204 if ((msg = sshbuf_new()) == NULL)
205 fatal("%s: sshbuf_new failed", __func__);
Ben Lindstromb6434ae2000-12-05 01:15:09 +0000206 }
markus@openbsd.org3f797652015-01-19 20:32:39 +0000207 if ((r = sshbuf_put(msg, c->c_data, c->c_plen)) != 0 ||
208 (r = sshbuf_consume(msg, 8 - (c->c_plen & 7))) != 0 || /* padding */
209 (r = sshbuf_get_u8(msg, &type)) != 0)
210 goto buf_err;
211 if (type != (int) SSH_SMSG_PUBLIC_KEY) {
Ben Lindstrom325e70c2001-08-06 22:41:30 +0000212 error("%s: invalid packet type", c->c_name);
markus@openbsd.org3f797652015-01-19 20:32:39 +0000213 sshbuf_reset(msg);
Ben Lindstrom325e70c2001-08-06 22:41:30 +0000214 return NULL;
Ben Lindstromb6434ae2000-12-05 01:15:09 +0000215 }
markus@openbsd.org3f797652015-01-19 20:32:39 +0000216 if ((r = sshbuf_consume(msg, 8)) != 0 || /* cookie */
217 /* server key */
218 (r = sshbuf_get_u32(msg, NULL)) != 0 ||
219 (r = sshbuf_get_bignum1(msg, NULL)) != 0 ||
220 (r = sshbuf_get_bignum1(msg, NULL)) != 0 ||
221 /* host key */
222 (r = sshbuf_get_u32(msg, NULL)) != 0 ||
223 (r = sshbuf_get_bignum1(msg, rsa->rsa->e)) != 0 ||
224 (r = sshbuf_get_bignum1(msg, rsa->rsa->n)) != 0) {
225 buf_err:
226 error("%s: buffer error: %s", __func__, ssh_err(r));
227 sshbuf_reset(msg);
228 return NULL;
229 }
Ben Lindstromb6434ae2000-12-05 01:15:09 +0000230
markus@openbsd.org3f797652015-01-19 20:32:39 +0000231 sshbuf_reset(msg);
Ben Lindstromb6434ae2000-12-05 01:15:09 +0000232
Ben Lindstrom325e70c2001-08-06 22:41:30 +0000233 return (rsa);
234}
Damien Miller1f0311c2014-05-15 14:24:09 +1000235#endif
Ben Lindstrom325e70c2001-08-06 22:41:30 +0000236
237static int
markus@openbsd.org3f797652015-01-19 20:32:39 +0000238key_print_wrapper(struct sshkey *hostkey, struct ssh *ssh)
Ben Lindstrom325e70c2001-08-06 22:41:30 +0000239{
markus@openbsd.org3f797652015-01-19 20:32:39 +0000240 con *c;
241
242 if ((c = ssh_get_app_data(ssh)) != NULL)
243 keyprint(c, hostkey);
244 /* always abort key exchange */
245 return -1;
Ben Lindstrom325e70c2001-08-06 22:41:30 +0000246}
247
248static int
249ssh2_capable(int remote_major, int remote_minor)
250{
251 switch (remote_major) {
252 case 1:
253 if (remote_minor == 99)
254 return 1;
255 break;
256 case 2:
257 return 1;
258 default:
259 break;
260 }
261 return 0;
262}
263
markus@openbsd.org3f797652015-01-19 20:32:39 +0000264static void
Ben Lindstrom325e70c2001-08-06 22:41:30 +0000265keygrab_ssh2(con *c)
266{
Damien Miller9235a032014-04-20 13:17:20 +1000267 char *myproposal[PROPOSAL_MAX] = { KEX_CLIENT };
markus@openbsd.org3f797652015-01-19 20:32:39 +0000268 int r;
Ben Lindstrom325e70c2001-08-06 22:41:30 +0000269
Ben Lindstrom325e70c2001-08-06 22:41:30 +0000270 enable_compat20();
djm@openbsd.org3a424cd2015-11-08 22:30:20 +0000271 switch (c->c_keytype) {
272 case KT_DSA:
273 myproposal[PROPOSAL_SERVER_HOST_KEY_ALGS] = get_cert ?
274 "ssh-dss-cert-v01@openssh.com" : "ssh-dss";
275 break;
276 case KT_RSA:
277 myproposal[PROPOSAL_SERVER_HOST_KEY_ALGS] = get_cert ?
278 "ssh-rsa-cert-v01@openssh.com" : "ssh-rsa";
279 break;
280 case KT_ED25519:
281 myproposal[PROPOSAL_SERVER_HOST_KEY_ALGS] = get_cert ?
282 "ssh-ed25519-cert-v01@openssh.com" : "ssh-ed25519";
283 break;
284 case KT_ECDSA:
285 myproposal[PROPOSAL_SERVER_HOST_KEY_ALGS] = get_cert ?
286 "ecdsa-sha2-nistp256-cert-v01@openssh.com,"
287 "ecdsa-sha2-nistp384-cert-v01@openssh.com,"
288 "ecdsa-sha2-nistp521-cert-v01@openssh.com" :
289 "ecdsa-sha2-nistp256,"
290 "ecdsa-sha2-nistp384,"
291 "ecdsa-sha2-nistp521";
292 break;
293 default:
294 fatal("unknown key type %d", c->c_keytype);
295 break;
296 }
markus@openbsd.org3f797652015-01-19 20:32:39 +0000297 if ((r = kex_setup(c->c_ssh, myproposal)) != 0) {
298 free(c->c_ssh);
299 fprintf(stderr, "kex_setup: %s\n", ssh_err(r));
Ben Lindstrom325e70c2001-08-06 22:41:30 +0000300 exit(1);
301 }
markus@openbsd.org3f797652015-01-19 20:32:39 +0000302#ifdef WITH_OPENSSL
303 c->c_ssh->kex->kex[KEX_DH_GRP1_SHA1] = kexdh_client;
304 c->c_ssh->kex->kex[KEX_DH_GRP14_SHA1] = kexdh_client;
djm@openbsd.org0e8eeec2016-05-02 10:26:04 +0000305 c->c_ssh->kex->kex[KEX_DH_GRP14_SHA256] = kexdh_client;
306 c->c_ssh->kex->kex[KEX_DH_GRP16_SHA512] = kexdh_client;
307 c->c_ssh->kex->kex[KEX_DH_GRP18_SHA512] = kexdh_client;
markus@openbsd.org3f797652015-01-19 20:32:39 +0000308 c->c_ssh->kex->kex[KEX_DH_GEX_SHA1] = kexgex_client;
309 c->c_ssh->kex->kex[KEX_DH_GEX_SHA256] = kexgex_client;
Darren Tuckerf2004cd2015-02-23 05:04:21 +1100310# ifdef OPENSSL_HAS_ECC
markus@openbsd.org3f797652015-01-19 20:32:39 +0000311 c->c_ssh->kex->kex[KEX_ECDH_SHA2] = kexecdh_client;
Darren Tuckerf2004cd2015-02-23 05:04:21 +1100312# endif
markus@openbsd.org3f797652015-01-19 20:32:39 +0000313#endif
314 c->c_ssh->kex->kex[KEX_C25519_SHA256] = kexc25519_client;
315 ssh_set_verify_host_key_callback(c->c_ssh, key_print_wrapper);
316 /*
317 * do the key-exchange until an error occurs or until
318 * the key_print_wrapper() callback sets c_done.
319 */
320 ssh_dispatch_run(c->c_ssh, DISPATCH_BLOCK, &c->c_done, c->c_ssh);
Ben Lindstrom325e70c2001-08-06 22:41:30 +0000321}
322
323static void
djm@openbsd.org9ada37d2015-10-24 22:56:19 +0000324keyprint_one(char *host, struct sshkey *key)
Ben Lindstrom325e70c2001-08-06 22:41:30 +0000325{
djm@openbsd.org9ada37d2015-10-24 22:56:19 +0000326 char *hostport;
Damien Millerdb7b8172005-03-01 21:48:03 +1100327
Damien Millerdb7b8172005-03-01 21:48:03 +1100328 if (hash_hosts && (host = host_hash(host, NULL, 0)) == NULL)
329 fatal("host_hash failed");
Ben Lindstrom325e70c2001-08-06 22:41:30 +0000330
djm@openbsd.org2c2cfe12015-04-10 00:08:55 +0000331 hostport = put_host_port(host, ssh_port);
djm@openbsd.org3a424cd2015-11-08 22:30:20 +0000332 if (!get_cert)
333 fprintf(stdout, "%s ", hostport);
markus@openbsd.org3f797652015-01-19 20:32:39 +0000334 sshkey_write(key, stdout);
Ben Lindstromb6434ae2000-12-05 01:15:09 +0000335 fputs("\n", stdout);
djm@openbsd.org2c2cfe12015-04-10 00:08:55 +0000336 free(hostport);
Ben Lindstromb6434ae2000-12-05 01:15:09 +0000337}
338
djm@openbsd.org9ada37d2015-10-24 22:56:19 +0000339static void
340keyprint(con *c, struct sshkey *key)
341{
342 char *hosts = c->c_output_name ? c->c_output_name : c->c_name;
343 char *host, *ohosts;
344
345 if (key == NULL)
346 return;
djm@openbsd.org3a424cd2015-11-08 22:30:20 +0000347 if (get_cert || (!hash_hosts && ssh_port == SSH_DEFAULT_PORT)) {
djm@openbsd.org9ada37d2015-10-24 22:56:19 +0000348 keyprint_one(hosts, key);
349 return;
350 }
351 ohosts = hosts = xstrdup(hosts);
352 while ((host = strsep(&hosts, ",")) != NULL)
353 keyprint_one(host, key);
354 free(ohosts);
355}
356
Ben Lindstrombba81212001-06-25 05:01:22 +0000357static int
Ben Lindstromb6434ae2000-12-05 01:15:09 +0000358tcpconnect(char *host)
359{
360 struct addrinfo hints, *ai, *aitop;
361 char strport[NI_MAXSERV];
362 int gaierr, s = -1;
363
Ben Lindstrom325e70c2001-08-06 22:41:30 +0000364 snprintf(strport, sizeof strport, "%d", ssh_port);
Ben Lindstromb6434ae2000-12-05 01:15:09 +0000365 memset(&hints, 0, sizeof(hints));
Ben Lindstrom325e70c2001-08-06 22:41:30 +0000366 hints.ai_family = IPv4or6;
Ben Lindstromb6434ae2000-12-05 01:15:09 +0000367 hints.ai_socktype = SOCK_STREAM;
djm@openbsd.orgfae7bbe2015-01-28 21:15:47 +0000368 if ((gaierr = getaddrinfo(host, strport, &hints, &aitop)) != 0) {
369 error("getaddrinfo %s: %s", host, ssh_gai_strerror(gaierr));
370 return -1;
371 }
Ben Lindstromb6434ae2000-12-05 01:15:09 +0000372 for (ai = aitop; ai; ai = ai->ai_next) {
Darren Tucker7bd98e72010-01-10 10:31:12 +1100373 s = socket(ai->ai_family, ai->ai_socktype, ai->ai_protocol);
Ben Lindstromb6434ae2000-12-05 01:15:09 +0000374 if (s < 0) {
375 error("socket: %s", strerror(errno));
376 continue;
377 }
Damien Miller232711f2004-06-15 10:35:30 +1000378 if (set_nonblock(s) == -1)
379 fatal("%s: set_nonblock(%d)", __func__, s);
Ben Lindstromb6434ae2000-12-05 01:15:09 +0000380 if (connect(s, ai->ai_addr, ai->ai_addrlen) < 0 &&
381 errno != EINPROGRESS)
382 error("connect (`%s'): %s", host, strerror(errno));
383 else
384 break;
385 close(s);
386 s = -1;
387 }
388 freeaddrinfo(aitop);
389 return s;
390}
391
Ben Lindstrombba81212001-06-25 05:01:22 +0000392static int
Ben Lindstrom325e70c2001-08-06 22:41:30 +0000393conalloc(char *iname, char *oname, int keytype)
Ben Lindstromb6434ae2000-12-05 01:15:09 +0000394{
Ben Lindstromb6434ae2000-12-05 01:15:09 +0000395 char *namebase, *name, *namelist;
Ben Lindstrom965710f2002-07-07 22:17:22 +0000396 int s;
Ben Lindstromb6434ae2000-12-05 01:15:09 +0000397
398 namebase = namelist = xstrdup(iname);
399
400 do {
401 name = xstrsep(&namelist, ",");
402 if (!name) {
Darren Tuckera627d422013-06-02 07:31:17 +1000403 free(namebase);
Ben Lindstromb6434ae2000-12-05 01:15:09 +0000404 return (-1);
405 }
406 } while ((s = tcpconnect(name)) < 0);
407
408 if (s >= maxfd)
Kevin Stevesfa72dda2000-12-15 18:39:12 +0000409 fatal("conalloc: fdno %d too high", s);
Ben Lindstromb6434ae2000-12-05 01:15:09 +0000410 if (fdcon[s].c_status)
Kevin Stevesfa72dda2000-12-15 18:39:12 +0000411 fatal("conalloc: attempt to reuse fdno %d", s);
Ben Lindstromb6434ae2000-12-05 01:15:09 +0000412
djm@openbsd.org3a424cd2015-11-08 22:30:20 +0000413 debug3("%s: oname %s kt %d", __func__, oname, keytype);
Ben Lindstromb6434ae2000-12-05 01:15:09 +0000414 fdcon[s].c_fd = s;
415 fdcon[s].c_status = CS_CON;
416 fdcon[s].c_namebase = namebase;
417 fdcon[s].c_name = name;
418 fdcon[s].c_namelist = namelist;
419 fdcon[s].c_output_name = xstrdup(oname);
420 fdcon[s].c_data = (char *) &fdcon[s].c_plen;
421 fdcon[s].c_len = 4;
422 fdcon[s].c_off = 0;
Ben Lindstrom325e70c2001-08-06 22:41:30 +0000423 fdcon[s].c_keytype = keytype;
Ben Lindstromb6434ae2000-12-05 01:15:09 +0000424 gettimeofday(&fdcon[s].c_tv, NULL);
425 fdcon[s].c_tv.tv_sec += timeout;
426 TAILQ_INSERT_TAIL(&tq, &fdcon[s], c_link);
Ben Lindstromc1e04212001-03-05 07:04:38 +0000427 FD_SET(s, read_wait);
Ben Lindstromb6434ae2000-12-05 01:15:09 +0000428 ncon++;
429 return (s);
430}
431
Ben Lindstrombba81212001-06-25 05:01:22 +0000432static void
Ben Lindstromb6434ae2000-12-05 01:15:09 +0000433confree(int s)
434{
Ben Lindstromb6434ae2000-12-05 01:15:09 +0000435 if (s >= maxfd || fdcon[s].c_status == CS_UNUSED)
Kevin Stevesfa72dda2000-12-15 18:39:12 +0000436 fatal("confree: attempt to free bad fdno %d", s);
Ben Lindstromd20b8552001-03-05 07:01:18 +0000437 close(s);
Darren Tuckera627d422013-06-02 07:31:17 +1000438 free(fdcon[s].c_namebase);
439 free(fdcon[s].c_output_name);
Ben Lindstromb6434ae2000-12-05 01:15:09 +0000440 if (fdcon[s].c_status == CS_KEYS)
Darren Tuckera627d422013-06-02 07:31:17 +1000441 free(fdcon[s].c_data);
Ben Lindstromb6434ae2000-12-05 01:15:09 +0000442 fdcon[s].c_status = CS_UNUSED;
Ben Lindstrom325e70c2001-08-06 22:41:30 +0000443 fdcon[s].c_keytype = 0;
markus@openbsd.org3f797652015-01-19 20:32:39 +0000444 if (fdcon[s].c_ssh) {
445 ssh_packet_close(fdcon[s].c_ssh);
446 free(fdcon[s].c_ssh);
447 fdcon[s].c_ssh = NULL;
448 }
Ben Lindstromb6434ae2000-12-05 01:15:09 +0000449 TAILQ_REMOVE(&tq, &fdcon[s], c_link);
Ben Lindstromc1e04212001-03-05 07:04:38 +0000450 FD_CLR(s, read_wait);
Ben Lindstromb6434ae2000-12-05 01:15:09 +0000451 ncon--;
452}
453
Ben Lindstrombba81212001-06-25 05:01:22 +0000454static void
Ben Lindstromb6434ae2000-12-05 01:15:09 +0000455contouch(int s)
456{
457 TAILQ_REMOVE(&tq, &fdcon[s], c_link);
458 gettimeofday(&fdcon[s].c_tv, NULL);
459 fdcon[s].c_tv.tv_sec += timeout;
460 TAILQ_INSERT_TAIL(&tq, &fdcon[s], c_link);
461}
462
Ben Lindstrombba81212001-06-25 05:01:22 +0000463static int
Ben Lindstromb6434ae2000-12-05 01:15:09 +0000464conrecycle(int s)
465{
Ben Lindstromb6434ae2000-12-05 01:15:09 +0000466 con *c = &fdcon[s];
Ben Lindstrom965710f2002-07-07 22:17:22 +0000467 int ret;
Ben Lindstromb6434ae2000-12-05 01:15:09 +0000468
Ben Lindstrom325e70c2001-08-06 22:41:30 +0000469 ret = conalloc(c->c_namelist, c->c_output_name, c->c_keytype);
Ben Lindstromb6434ae2000-12-05 01:15:09 +0000470 confree(s);
Ben Lindstromb6434ae2000-12-05 01:15:09 +0000471 return (ret);
472}
473
Ben Lindstrombba81212001-06-25 05:01:22 +0000474static void
Ben Lindstromb6434ae2000-12-05 01:15:09 +0000475congreet(int s)
476{
Damien Millereccb9de2005-06-17 12:59:34 +1000477 int n = 0, remote_major = 0, remote_minor = 0;
Ben Lindstrom325e70c2001-08-06 22:41:30 +0000478 char buf[256], *cp;
Damien Miller83c02ef2001-12-21 12:45:43 +1100479 char remote_version[sizeof buf];
Damien Millereccb9de2005-06-17 12:59:34 +1000480 size_t bufsiz;
Ben Lindstromb6434ae2000-12-05 01:15:09 +0000481 con *c = &fdcon[s];
482
Damien Miller4bbacb72005-11-05 15:12:28 +1100483 for (;;) {
484 memset(buf, '\0', sizeof(buf));
485 bufsiz = sizeof(buf);
486 cp = buf;
487 while (bufsiz-- &&
488 (n = atomicio(read, s, cp, 1)) == 1 && *cp != '\n') {
489 if (*cp == '\r')
490 *cp = '\n';
491 cp++;
492 }
493 if (n != 1 || strncmp(buf, "SSH-", 4) == 0)
494 break;
Ben Lindstromde8fc6f2001-08-06 22:43:50 +0000495 }
Ben Lindstrom6b28c352002-03-05 01:54:52 +0000496 if (n == 0) {
Damien Millerb253cc42005-05-26 12:23:44 +1000497 switch (errno) {
498 case EPIPE:
499 error("%s: Connection closed by remote host", c->c_name);
500 break;
501 case ECONNREFUSED:
502 break;
503 default:
504 error("read (%s): %s", c->c_name, strerror(errno));
505 break;
506 }
Ben Lindstrom6b28c352002-03-05 01:54:52 +0000507 conrecycle(s);
508 return;
509 }
Ben Lindstrom884a4ac2001-03-06 03:33:04 +0000510 if (*cp != '\n' && *cp != '\r') {
Ben Lindstromb6434ae2000-12-05 01:15:09 +0000511 error("%s: bad greeting", c->c_name);
512 confree(s);
513 return;
514 }
Ben Lindstrom884a4ac2001-03-06 03:33:04 +0000515 *cp = '\0';
djm@openbsd.org4509b5d2015-01-30 01:13:33 +0000516 if ((c->c_ssh = ssh_packet_set_connection(NULL, s, s)) == NULL)
517 fatal("ssh_packet_set_connection failed");
djm@openbsd.org802660c2015-01-30 10:44:49 +0000518 ssh_packet_set_timeout(c->c_ssh, timeout, 1);
markus@openbsd.org3f797652015-01-19 20:32:39 +0000519 ssh_set_app_data(c->c_ssh, c); /* back link */
Damien Miller83c02ef2001-12-21 12:45:43 +1100520 if (sscanf(buf, "SSH-%d.%d-%[^\n]\n",
521 &remote_major, &remote_minor, remote_version) == 3)
markus@openbsd.org3f797652015-01-19 20:32:39 +0000522 c->c_ssh->compat = compat_datafellows(remote_version);
Damien Miller83c02ef2001-12-21 12:45:43 +1100523 else
markus@openbsd.org3f797652015-01-19 20:32:39 +0000524 c->c_ssh->compat = 0;
Ben Lindstrom325e70c2001-08-06 22:41:30 +0000525 if (c->c_keytype != KT_RSA1) {
Ben Lindstrom325e70c2001-08-06 22:41:30 +0000526 if (!ssh2_capable(remote_major, remote_minor)) {
527 debug("%s doesn't support ssh2", c->c_name);
528 confree(s);
529 return;
530 }
Damien Miller83c02ef2001-12-21 12:45:43 +1100531 } else if (remote_major != 1) {
532 debug("%s doesn't support ssh1", c->c_name);
533 confree(s);
534 return;
Ben Lindstrom325e70c2001-08-06 22:41:30 +0000535 }
djm@openbsd.org2c2cfe12015-04-10 00:08:55 +0000536 fprintf(stderr, "# %s:%d %s\n", c->c_name, ssh_port, chop(buf));
Ben Lindstrom325e70c2001-08-06 22:41:30 +0000537 n = snprintf(buf, sizeof buf, "SSH-%d.%d-OpenSSH-keyscan\r\n",
538 c->c_keytype == KT_RSA1? PROTOCOL_MAJOR_1 : PROTOCOL_MAJOR_2,
539 c->c_keytype == KT_RSA1? PROTOCOL_MINOR_1 : PROTOCOL_MINOR_2);
Damien Millereccb9de2005-06-17 12:59:34 +1000540 if (n < 0 || (size_t)n >= sizeof(buf)) {
Damien Miller41bfc292005-05-26 12:07:32 +1000541 error("snprintf: buffer too small");
542 confree(s);
543 return;
544 }
Damien Millereccb9de2005-06-17 12:59:34 +1000545 if (atomicio(vwrite, s, buf, n) != (size_t)n) {
Ben Lindstromb6434ae2000-12-05 01:15:09 +0000546 error("write (%s): %s", c->c_name, strerror(errno));
547 confree(s);
548 return;
549 }
Ben Lindstrom325e70c2001-08-06 22:41:30 +0000550 if (c->c_keytype != KT_RSA1) {
markus@openbsd.org3f797652015-01-19 20:32:39 +0000551 keygrab_ssh2(c);
Ben Lindstrom325e70c2001-08-06 22:41:30 +0000552 confree(s);
553 return;
554 }
Ben Lindstromb6434ae2000-12-05 01:15:09 +0000555 c->c_status = CS_SIZE;
556 contouch(s);
557}
558
Ben Lindstrombba81212001-06-25 05:01:22 +0000559static void
Ben Lindstromb6434ae2000-12-05 01:15:09 +0000560conread(int s)
561{
Ben Lindstromb6434ae2000-12-05 01:15:09 +0000562 con *c = &fdcon[s];
Damien Millerb253cc42005-05-26 12:23:44 +1000563 size_t n;
Ben Lindstromb6434ae2000-12-05 01:15:09 +0000564
565 if (c->c_status == CS_CON) {
566 congreet(s);
567 return;
568 }
Darren Tuckerfe6649d2004-08-13 21:19:37 +1000569 n = atomicio(read, s, c->c_data + c->c_off, c->c_len - c->c_off);
Damien Millerb253cc42005-05-26 12:23:44 +1000570 if (n == 0) {
Ben Lindstromb6434ae2000-12-05 01:15:09 +0000571 error("read (%s): %s", c->c_name, strerror(errno));
572 confree(s);
573 return;
574 }
575 c->c_off += n;
576
577 if (c->c_off == c->c_len)
578 switch (c->c_status) {
579 case CS_SIZE:
580 c->c_plen = htonl(c->c_plen);
581 c->c_len = c->c_plen + 8 - (c->c_plen & 7);
582 c->c_off = 0;
583 c->c_data = xmalloc(c->c_len);
584 c->c_status = CS_KEYS;
585 break;
Damien Miller1f0311c2014-05-15 14:24:09 +1000586#ifdef WITH_SSH1
Ben Lindstromb6434ae2000-12-05 01:15:09 +0000587 case CS_KEYS:
Ben Lindstrom325e70c2001-08-06 22:41:30 +0000588 keyprint(c, keygrab_ssh1(c));
Ben Lindstromb6434ae2000-12-05 01:15:09 +0000589 confree(s);
590 return;
Damien Miller1f0311c2014-05-15 14:24:09 +1000591#endif
Ben Lindstromb6434ae2000-12-05 01:15:09 +0000592 default:
Kevin Stevesfa72dda2000-12-15 18:39:12 +0000593 fatal("conread: invalid status %d", c->c_status);
Ben Lindstromb6434ae2000-12-05 01:15:09 +0000594 break;
595 }
596
597 contouch(s);
598}
599
Ben Lindstrombba81212001-06-25 05:01:22 +0000600static void
Ben Lindstromb6434ae2000-12-05 01:15:09 +0000601conloop(void)
602{
Ben Lindstromb6434ae2000-12-05 01:15:09 +0000603 struct timeval seltime, now;
Ben Lindstrom965710f2002-07-07 22:17:22 +0000604 fd_set *r, *e;
Ben Lindstromb6434ae2000-12-05 01:15:09 +0000605 con *c;
Ben Lindstrom965710f2002-07-07 22:17:22 +0000606 int i;
Ben Lindstromb6434ae2000-12-05 01:15:09 +0000607
608 gettimeofday(&now, NULL);
Ben Lindstrom61c183b2002-06-21 00:09:54 +0000609 c = TAILQ_FIRST(&tq);
Ben Lindstromb6434ae2000-12-05 01:15:09 +0000610
Ben Lindstromd20b8552001-03-05 07:01:18 +0000611 if (c && (c->c_tv.tv_sec > now.tv_sec ||
612 (c->c_tv.tv_sec == now.tv_sec && c->c_tv.tv_usec > now.tv_usec))) {
Ben Lindstromb6434ae2000-12-05 01:15:09 +0000613 seltime = c->c_tv;
614 seltime.tv_sec -= now.tv_sec;
615 seltime.tv_usec -= now.tv_usec;
Ben Lindstromc791beb2001-02-10 23:18:11 +0000616 if (seltime.tv_usec < 0) {
Ben Lindstromb6434ae2000-12-05 01:15:09 +0000617 seltime.tv_usec += 1000000;
618 seltime.tv_sec--;
619 }
620 } else
Damien Millerc5219e72011-05-05 14:05:12 +1000621 timerclear(&seltime);
Ben Lindstromb6434ae2000-12-05 01:15:09 +0000622
Damien Miller07d86be2006-03-26 14:19:21 +1100623 r = xcalloc(read_wait_nfdset, sizeof(fd_mask));
624 e = xcalloc(read_wait_nfdset, sizeof(fd_mask));
625 memcpy(r, read_wait, read_wait_nfdset * sizeof(fd_mask));
626 memcpy(e, read_wait, read_wait_nfdset * sizeof(fd_mask));
Ben Lindstromc1e04212001-03-05 07:04:38 +0000627
628 while (select(maxfd, r, NULL, e, &seltime) == -1 &&
Damien Millerd8968ad2008-07-04 23:10:49 +1000629 (errno == EAGAIN || errno == EINTR || errno == EWOULDBLOCK))
Ben Lindstromf9452512001-02-15 03:12:08 +0000630 ;
631
Ben Lindstromd20b8552001-03-05 07:01:18 +0000632 for (i = 0; i < maxfd; i++) {
Ben Lindstromc1e04212001-03-05 07:04:38 +0000633 if (FD_ISSET(i, e)) {
Ben Lindstromb6434ae2000-12-05 01:15:09 +0000634 error("%s: exception!", fdcon[i].c_name);
635 confree(i);
Ben Lindstromc1e04212001-03-05 07:04:38 +0000636 } else if (FD_ISSET(i, r))
Ben Lindstromb6434ae2000-12-05 01:15:09 +0000637 conread(i);
Ben Lindstromd20b8552001-03-05 07:01:18 +0000638 }
Darren Tuckera627d422013-06-02 07:31:17 +1000639 free(r);
640 free(e);
Ben Lindstromb6434ae2000-12-05 01:15:09 +0000641
Ben Lindstrom61c183b2002-06-21 00:09:54 +0000642 c = TAILQ_FIRST(&tq);
Ben Lindstromd20b8552001-03-05 07:01:18 +0000643 while (c && (c->c_tv.tv_sec < now.tv_sec ||
644 (c->c_tv.tv_sec == now.tv_sec && c->c_tv.tv_usec < now.tv_usec))) {
Ben Lindstromb6434ae2000-12-05 01:15:09 +0000645 int s = c->c_fd;
Ben Lindstromd20b8552001-03-05 07:01:18 +0000646
Ben Lindstrom61c183b2002-06-21 00:09:54 +0000647 c = TAILQ_NEXT(c, c_link);
Ben Lindstromb6434ae2000-12-05 01:15:09 +0000648 conrecycle(s);
649 }
650}
651
Ben Lindstrom325e70c2001-08-06 22:41:30 +0000652static void
653do_host(char *host)
Ben Lindstromb6434ae2000-12-05 01:15:09 +0000654{
Ben Lindstrom325e70c2001-08-06 22:41:30 +0000655 char *name = strnnsep(&host, " \t\n");
656 int j;
Ben Lindstromb6434ae2000-12-05 01:15:09 +0000657
Ben Lindstromeaffb9d2001-12-06 16:28:19 +0000658 if (name == NULL)
659 return;
Damien Miller5be9d9e2013-12-07 11:24:01 +1100660 for (j = KT_RSA1; j <= KT_ED25519; j *= 2) {
Ben Lindstrom325e70c2001-08-06 22:41:30 +0000661 if (get_keytypes & j) {
662 while (ncon >= MAXCON)
663 conloop();
664 conalloc(name, *host ? host : name, j);
Ben Lindstromb6434ae2000-12-05 01:15:09 +0000665 }
666 }
667}
668
Ben Lindstrom9c8edc92002-02-26 17:52:14 +0000669void
670fatal(const char *fmt,...)
Ben Lindstrom325e70c2001-08-06 22:41:30 +0000671{
Ben Lindstrom9c8edc92002-02-26 17:52:14 +0000672 va_list args;
Ben Lindstrom965710f2002-07-07 22:17:22 +0000673
Ben Lindstrom9c8edc92002-02-26 17:52:14 +0000674 va_start(args, fmt);
675 do_log(SYSLOG_LEVEL_FATAL, fmt, args);
676 va_end(args);
markus@openbsd.org3f797652015-01-19 20:32:39 +0000677 exit(255);
Ben Lindstrom325e70c2001-08-06 22:41:30 +0000678}
679
680static void
Ben Lindstromb6434ae2000-12-05 01:15:09 +0000681usage(void)
682{
Damien Millerc1719f72008-11-03 19:27:07 +1100683 fprintf(stderr,
jmc@openbsd.orge72a8572015-11-08 23:24:03 +0000684 "usage: %s [-46cHv] [-f file] [-p port] [-T timeout] [-t type]\n"
Darren Tucker7bd98e72010-01-10 10:31:12 +1100685 "\t\t [host | addrlist namelist] ...\n",
Ben Lindstromddfb1e32001-08-06 22:06:35 +0000686 __progname);
Ben Lindstromddfb1e32001-08-06 22:06:35 +0000687 exit(1);
Ben Lindstromb6434ae2000-12-05 01:15:09 +0000688}
689
690int
691main(int argc, char **argv)
692{
Ben Lindstrom325e70c2001-08-06 22:41:30 +0000693 int debug_flag = 0, log_level = SYSLOG_LEVEL_INFO;
Damien Miller0e76c5e2010-06-26 09:39:59 +1000694 int opt, fopt_count = 0, j;
695 char *tname, *cp, line[NI_MAXHOST];
696 FILE *fp;
697 u_long linenum;
Kevin Steves76e7d9b2001-09-20 20:30:09 +0000698
Ben Lindstrom325e70c2001-08-06 22:41:30 +0000699 extern int optind;
700 extern char *optarg;
Ben Lindstromb6434ae2000-12-05 01:15:09 +0000701
dtucker@openbsd.orgffb1e7e2016-02-15 09:47:49 +0000702 ssh_malloc_init(); /* must be called before any mallocs */
Damien Miller59d3d5b2003-08-22 09:34:41 +1000703 __progname = ssh_get_progname(argv[0]);
Ben Lindstrom4e088e42001-10-10 20:45:43 +0000704 seed_rng();
Ben Lindstromb6434ae2000-12-05 01:15:09 +0000705 TAILQ_INIT(&tq);
706
Darren Tuckerce321d82005-10-03 18:11:24 +1000707 /* Ensure that fds 0, 1 and 2 are open or directed to /dev/null */
708 sanitise_stdfd();
709
Ben Lindstrom325e70c2001-08-06 22:41:30 +0000710 if (argc <= 1)
Ben Lindstromb6434ae2000-12-05 01:15:09 +0000711 usage();
712
djm@openbsd.org3a424cd2015-11-08 22:30:20 +0000713 while ((opt = getopt(argc, argv, "cHv46p:T:t:f:")) != -1) {
Ben Lindstrom325e70c2001-08-06 22:41:30 +0000714 switch (opt) {
Damien Millerdb7b8172005-03-01 21:48:03 +1100715 case 'H':
716 hash_hosts = 1;
717 break;
djm@openbsd.org3a424cd2015-11-08 22:30:20 +0000718 case 'c':
719 get_cert = 1;
720 break;
Ben Lindstrom325e70c2001-08-06 22:41:30 +0000721 case 'p':
722 ssh_port = a2port(optarg);
Damien Miller3dc71ad2009-01-28 16:31:22 +1100723 if (ssh_port <= 0) {
Ben Lindstrom325e70c2001-08-06 22:41:30 +0000724 fprintf(stderr, "Bad port '%s'\n", optarg);
725 exit(1);
726 }
727 break;
728 case 'T':
Ben Lindstromedd098b2002-07-04 00:07:13 +0000729 timeout = convtime(optarg);
730 if (timeout == -1 || timeout == 0) {
731 fprintf(stderr, "Bad timeout '%s'\n", optarg);
Ben Lindstromb6434ae2000-12-05 01:15:09 +0000732 usage();
Ben Lindstromedd098b2002-07-04 00:07:13 +0000733 }
Ben Lindstrom325e70c2001-08-06 22:41:30 +0000734 break;
735 case 'v':
736 if (!debug_flag) {
737 debug_flag = 1;
738 log_level = SYSLOG_LEVEL_DEBUG1;
739 }
740 else if (log_level < SYSLOG_LEVEL_DEBUG3)
741 log_level++;
742 else
743 fatal("Too high debugging level.");
744 break;
Kevin Steves76e7d9b2001-09-20 20:30:09 +0000745 case 'f':
Ben Lindstrom325e70c2001-08-06 22:41:30 +0000746 if (strcmp(optarg, "-") == 0)
747 optarg = NULL;
748 argv[fopt_count++] = optarg;
749 break;
750 case 't':
751 get_keytypes = 0;
752 tname = strtok(optarg, ",");
753 while (tname) {
markus@openbsd.org3f797652015-01-19 20:32:39 +0000754 int type = sshkey_type_from_name(tname);
Ben Lindstrom325e70c2001-08-06 22:41:30 +0000755 switch (type) {
756 case KEY_RSA1:
757 get_keytypes |= KT_RSA1;
758 break;
759 case KEY_DSA:
760 get_keytypes |= KT_DSA;
761 break;
Damien Millereb8b60e2010-08-31 22:41:14 +1000762 case KEY_ECDSA:
763 get_keytypes |= KT_ECDSA;
764 break;
Ben Lindstrom325e70c2001-08-06 22:41:30 +0000765 case KEY_RSA:
766 get_keytypes |= KT_RSA;
767 break;
Damien Miller5be9d9e2013-12-07 11:24:01 +1100768 case KEY_ED25519:
769 get_keytypes |= KT_ED25519;
770 break;
Ben Lindstrom325e70c2001-08-06 22:41:30 +0000771 case KEY_UNSPEC:
Ben Lindstrom28c603b2001-12-06 16:45:10 +0000772 fatal("unknown key type %s", tname);
Ben Lindstrom325e70c2001-08-06 22:41:30 +0000773 }
774 tname = strtok(NULL, ",");
775 }
776 break;
777 case '4':
778 IPv4or6 = AF_INET;
779 break;
780 case '6':
781 IPv4or6 = AF_INET6;
782 break;
783 case '?':
784 default:
Ben Lindstromb6434ae2000-12-05 01:15:09 +0000785 usage();
Ben Lindstrom325e70c2001-08-06 22:41:30 +0000786 }
Ben Lindstromb6434ae2000-12-05 01:15:09 +0000787 }
Ben Lindstrom325e70c2001-08-06 22:41:30 +0000788 if (optind == argc && !fopt_count)
Ben Lindstromb6434ae2000-12-05 01:15:09 +0000789 usage();
790
Ben Lindstrom325e70c2001-08-06 22:41:30 +0000791 log_init("ssh-keyscan", log_level, SYSLOG_FACILITY_USER, 1);
Ben Lindstrom325e70c2001-08-06 22:41:30 +0000792
Ben Lindstromb6434ae2000-12-05 01:15:09 +0000793 maxfd = fdlim_get(1);
794 if (maxfd < 0)
Kevin Stevesfa72dda2000-12-15 18:39:12 +0000795 fatal("%s: fdlim_get: bad value", __progname);
Ben Lindstromb6434ae2000-12-05 01:15:09 +0000796 if (maxfd > MAXMAXFD)
797 maxfd = MAXMAXFD;
Ben Lindstromd20b8552001-03-05 07:01:18 +0000798 if (MAXCON <= 0)
Kevin Stevesfa72dda2000-12-15 18:39:12 +0000799 fatal("%s: not enough file descriptors", __progname);
Ben Lindstromb6434ae2000-12-05 01:15:09 +0000800 if (maxfd > fdlim_get(0))
801 fdlim_set(maxfd);
Damien Miller07d86be2006-03-26 14:19:21 +1100802 fdcon = xcalloc(maxfd, sizeof(con));
Ben Lindstromb6434ae2000-12-05 01:15:09 +0000803
Damien Miller07d86be2006-03-26 14:19:21 +1100804 read_wait_nfdset = howmany(maxfd, NFDBITS);
805 read_wait = xcalloc(read_wait_nfdset, sizeof(fd_mask));
Ben Lindstromc1e04212001-03-05 07:04:38 +0000806
Damien Miller0e76c5e2010-06-26 09:39:59 +1000807 for (j = 0; j < fopt_count; j++) {
808 if (argv[j] == NULL)
809 fp = stdin;
810 else if ((fp = fopen(argv[j], "r")) == NULL)
811 fatal("%s: %s: %s", __progname, argv[j],
812 strerror(errno));
813 linenum = 0;
Ben Lindstromb6434ae2000-12-05 01:15:09 +0000814
Damien Miller0e76c5e2010-06-26 09:39:59 +1000815 while (read_keyfile_line(fp,
816 argv[j] == NULL ? "(stdin)" : argv[j], line, sizeof(line),
817 &linenum) != -1) {
818 /* Chomp off trailing whitespace and comments */
819 if ((cp = strchr(line, '#')) == NULL)
820 cp = line + strlen(line) - 1;
821 while (cp >= line) {
822 if (*cp == ' ' || *cp == '\t' ||
823 *cp == '\n' || *cp == '#')
824 *cp-- = '\0';
825 else
826 break;
827 }
828
829 /* Skip empty lines */
830 if (*line == '\0')
Ben Lindstrom78bbd9e2001-09-12 17:10:40 +0000831 continue;
Damien Miller0e76c5e2010-06-26 09:39:59 +1000832
833 do_host(line);
Ben Lindstromb6434ae2000-12-05 01:15:09 +0000834 }
Damien Miller0e76c5e2010-06-26 09:39:59 +1000835
836 if (ferror(fp))
837 fatal("%s: %s: %s", __progname, argv[j],
838 strerror(errno));
839
840 fclose(fp);
Ben Lindstrom325e70c2001-08-06 22:41:30 +0000841 }
842
843 while (optind < argc)
844 do_host(argv[optind++]);
845
Ben Lindstromb6434ae2000-12-05 01:15:09 +0000846 while (ncon > 0)
847 conloop();
848
849 return (0);
850}