Annotation of src/crypto/external/bsd/openssh/dist/ssh-keyscan.c, Revision 1.19.4.1
1.19.4.1! snj 1: /* $NetBSD: ssh-keyscan.c,v 1.20 2017/10/07 19:39:19 christos Exp $ */
! 2: /* $OpenBSD: ssh-keyscan.c,v 1.115 2017/06/30 04:17:23 dtucker Exp $ */
1.1 christos 3: /*
4: * Copyright 1995, 1996 by David Mazieres <dm@lcs.mit.edu>.
5: *
6: * Modification and redistribution in source and binary forms is
7: * permitted provided that due credit is given to the author and the
8: * OpenBSD project by leaving this copyright notice intact.
9: */
10:
1.2 christos 11: #include "includes.h"
1.19.4.1! snj 12: __RCSID("$NetBSD: ssh-keyscan.c,v 1.20 2017/10/07 19:39:19 christos Exp $");
1.3 rmind 13:
14: #include <sys/param.h>
1.1 christos 15: #include <sys/types.h>
16: #include <sys/socket.h>
17: #include <sys/queue.h>
18: #include <sys/time.h>
19: #include <sys/resource.h>
20:
21: #include <openssl/bn.h>
22:
23: #include <errno.h>
24: #include <netdb.h>
25: #include <stdarg.h>
26: #include <stdio.h>
27: #include <stdlib.h>
28: #include <signal.h>
29: #include <string.h>
30: #include <unistd.h>
31:
32: #include "xmalloc.h"
33: #include "ssh.h"
1.11 christos 34: #include "sshbuf.h"
35: #include "sshkey.h"
1.1 christos 36: #include "cipher.h"
37: #include "kex.h"
38: #include "compat.h"
39: #include "myproposal.h"
40: #include "packet.h"
41: #include "dispatch.h"
42: #include "log.h"
43: #include "atomicio.h"
44: #include "misc.h"
45: #include "hostfile.h"
1.11 christos 46: #include "ssherr.h"
47: #include "ssh_api.h"
1.1 christos 48:
49: /* Flag indicating whether IPv4 or IPv6. This can be set on the command line.
50: Default value is AF_UNSPEC means both IPv4 and IPv6. */
51: int IPv4or6 = AF_UNSPEC;
52:
53: int ssh_port = SSH_DEFAULT_PORT;
54:
1.19.4.1! snj 55: #define KT_DSA (1)
! 56: #define KT_RSA (1<<1)
! 57: #define KT_ECDSA (1<<2)
! 58: #define KT_ED25519 (1<<3)
! 59:
! 60: #define KT_MIN KT_DSA
! 61: #define KT_MAX KT_ED25519
1.1 christos 62:
1.15 christos 63: int get_cert = 0;
1.10 christos 64: int get_keytypes = KT_RSA|KT_ECDSA|KT_ED25519;
1.1 christos 65:
66: int hash_hosts = 0; /* Hash hostname on output */
67:
68: #define MAXMAXFD 256
69:
70: /* The number of seconds after which to give up on a TCP connection */
71: int timeout = 5;
72:
73: int maxfd;
74: #define MAXCON (maxfd - 10)
75:
76: extern char *__progname;
77: fd_set *read_wait;
78: size_t read_wait_nfdset;
79: int ncon;
80:
81: /*
82: * Keep a connection structure for each file descriptor. The state
83: * associated with file descriptor n is held in fdcon[n].
84: */
85: typedef struct Connection {
86: u_char c_status; /* State of connection on this file desc. */
87: #define CS_UNUSED 0 /* File descriptor unused */
88: #define CS_CON 1 /* Waiting to connect/read greeting */
89: #define CS_SIZE 2 /* Waiting to read initial packet size */
90: #define CS_KEYS 3 /* Waiting to read public key packet */
91: int c_fd; /* Quick lookup: c->c_fd == c - fdcon */
92: int c_plen; /* Packet length field for ssh packet */
93: int c_len; /* Total bytes which must be read. */
94: int c_off; /* Length of data read so far. */
1.19.4.1! snj 95: int c_keytype; /* Only one of KT_* */
1.12 christos 96: sig_atomic_t c_done; /* SSH2 done */
1.1 christos 97: char *c_namebase; /* Address to free for c_name and c_namelist */
98: char *c_name; /* Hostname of connection for errors */
99: char *c_namelist; /* Pointer to other possible addresses */
100: char *c_output_name; /* Hostname of connection for output */
101: char *c_data; /* Data read from this fd */
1.11 christos 102: struct ssh *c_ssh; /* SSH-connection */
1.1 christos 103: struct timeval c_tv; /* Time at which connection gets aborted */
104: TAILQ_ENTRY(Connection) c_link; /* List of connections in timeout order. */
105: } con;
106:
107: TAILQ_HEAD(conlist, Connection) tq; /* Timeout Queue */
108: con *fdcon;
109:
1.11 christos 110: static void keyprint(con *c, struct sshkey *key);
111:
1.1 christos 112: static int
113: fdlim_get(int hard)
114: {
115: struct rlimit rlfd;
116:
117: if (getrlimit(RLIMIT_NOFILE, &rlfd) < 0)
118: return (-1);
119: if ((hard ? rlfd.rlim_max : rlfd.rlim_cur) == RLIM_INFINITY)
120: return sysconf(_SC_OPEN_MAX);
121: else
122: return hard ? rlfd.rlim_max : rlfd.rlim_cur;
123: }
124:
125: static int
126: fdlim_set(int lim)
127: {
128: struct rlimit rlfd;
129:
130: if (lim <= 0)
131: return (-1);
132: if (getrlimit(RLIMIT_NOFILE, &rlfd) < 0)
133: return (-1);
134: rlfd.rlim_cur = lim;
135: if (setrlimit(RLIMIT_NOFILE, &rlfd) < 0)
136: return (-1);
137: return (0);
138: }
139:
140: /*
141: * This is an strsep function that returns a null field for adjacent
142: * separators. This is the same as the 4.4BSD strsep, but different from the
143: * one in the GNU libc.
144: */
145: static char *
146: xstrsep(char **str, const char *delim)
147: {
148: char *s, *e;
149:
150: if (!**str)
151: return (NULL);
152:
153: s = *str;
154: e = s + strcspn(s, delim);
155:
156: if (*e != '\0')
157: *e++ = '\0';
158: *str = e;
159:
160: return (s);
161: }
162:
163: /*
164: * Get the next non-null token (like GNU strsep). Strsep() will return a
165: * null token for two adjacent separators, so we may have to loop.
166: */
167: static char *
1.5 christos 168: strnnsep(char **stringp, const char *delim)
1.1 christos 169: {
170: char *tok;
171:
172: do {
173: tok = xstrsep(stringp, delim);
174: } while (tok && *tok == '\0');
175: return (tok);
176: }
177:
178:
179: static int
1.11 christos 180: key_print_wrapper(struct sshkey *hostkey, struct ssh *ssh)
1.1 christos 181: {
1.11 christos 182: con *c;
183:
184: if ((c = ssh_get_app_data(ssh)) != NULL)
185: keyprint(c, hostkey);
186: /* always abort key exchange */
187: return -1;
1.1 christos 188: }
189:
190: static int
191: ssh2_capable(int remote_major, int remote_minor)
192: {
193: switch (remote_major) {
194: case 1:
195: if (remote_minor == 99)
196: return 1;
197: break;
198: case 2:
199: return 1;
200: default:
201: break;
202: }
203: return 0;
204: }
205:
1.11 christos 206: static void
1.1 christos 207: keygrab_ssh2(con *c)
208: {
1.10 christos 209: const char *myproposal[PROPOSAL_MAX] = { KEX_CLIENT };
1.11 christos 210: int r;
1.1 christos 211:
1.15 christos 212: switch (c->c_keytype) {
213: case KT_DSA:
214: myproposal[PROPOSAL_SERVER_HOST_KEY_ALGS] = get_cert ?
215: "ssh-dss-cert-v01@openssh.com" : "ssh-dss";
216: break;
217: case KT_RSA:
218: myproposal[PROPOSAL_SERVER_HOST_KEY_ALGS] = get_cert ?
219: "ssh-rsa-cert-v01@openssh.com" : "ssh-rsa";
220: break;
221: case KT_ED25519:
222: myproposal[PROPOSAL_SERVER_HOST_KEY_ALGS] = get_cert ?
223: "ssh-ed25519-cert-v01@openssh.com" : "ssh-ed25519";
224: break;
225: case KT_ECDSA:
226: myproposal[PROPOSAL_SERVER_HOST_KEY_ALGS] = get_cert ?
227: "ecdsa-sha2-nistp256-cert-v01@openssh.com,"
228: "ecdsa-sha2-nistp384-cert-v01@openssh.com,"
229: "ecdsa-sha2-nistp521-cert-v01@openssh.com" :
230: "ecdsa-sha2-nistp256,"
231: "ecdsa-sha2-nistp384,"
232: "ecdsa-sha2-nistp521";
233: break;
234: default:
235: fatal("unknown key type %d", c->c_keytype);
236: break;
237: }
1.11 christos 238: if ((r = kex_setup(c->c_ssh, myproposal)) != 0) {
239: free(c->c_ssh);
240: fprintf(stderr, "kex_setup: %s\n", ssh_err(r));
241: exit(1);
242: }
1.10 christos 243: #ifdef WITH_OPENSSL
1.11 christos 244: c->c_ssh->kex->kex[KEX_DH_GRP1_SHA1] = kexdh_client;
245: c->c_ssh->kex->kex[KEX_DH_GRP14_SHA1] = kexdh_client;
1.17 christos 246: c->c_ssh->kex->kex[KEX_DH_GRP14_SHA256] = kexdh_client;
247: c->c_ssh->kex->kex[KEX_DH_GRP16_SHA512] = kexdh_client;
248: c->c_ssh->kex->kex[KEX_DH_GRP18_SHA512] = kexdh_client;
1.11 christos 249: c->c_ssh->kex->kex[KEX_DH_GEX_SHA1] = kexgex_client;
250: c->c_ssh->kex->kex[KEX_DH_GEX_SHA256] = kexgex_client;
251: c->c_ssh->kex->kex[KEX_ECDH_SHA2] = kexecdh_client;
1.10 christos 252: #endif
1.11 christos 253: c->c_ssh->kex->kex[KEX_C25519_SHA256] = kexc25519_client;
254: ssh_set_verify_host_key_callback(c->c_ssh, key_print_wrapper);
255: /*
256: * do the key-exchange until an error occurs or until
257: * the key_print_wrapper() callback sets c_done.
258: */
1.19.4.1! snj 259: ssh_dispatch_run(c->c_ssh, DISPATCH_BLOCK, &c->c_done);
1.1 christos 260: }
261:
262: static void
1.19 christos 263: keyprint_one(const char *host, struct sshkey *key)
1.1 christos 264: {
1.15 christos 265: char *hostport;
1.19 christos 266: const char *known_host, *hashed;
1.1 christos 267:
1.19 christos 268: hostport = put_host_port(host, ssh_port);
269: lowercase(hostport);
270: if (hash_hosts && (hashed = host_hash(host, NULL, 0)) == NULL)
1.1 christos 271: fatal("host_hash failed");
1.19 christos 272: known_host = hash_hosts ? hashed : hostport;
1.15 christos 273: if (!get_cert)
1.19 christos 274: fprintf(stdout, "%s ", known_host);
275: sshkey_write(key, stdout);
1.15 christos 276: fputs("\n", stdout);
277: free(hostport);
278: }
1.14 christos 279:
1.15 christos 280: static void
281: keyprint(con *c, struct sshkey *key)
282: {
283: char *hosts = c->c_output_name ? c->c_output_name : c->c_name;
284: char *host, *ohosts;
1.13 christos 285:
1.15 christos 286: if (key == NULL)
287: return;
288: if (get_cert || (!hash_hosts && ssh_port == SSH_DEFAULT_PORT)) {
289: keyprint_one(hosts, key);
290: return;
291: }
292: ohosts = hosts = xstrdup(hosts);
293: while ((host = strsep(&hosts, ",")) != NULL)
294: keyprint_one(host, key);
295: free(ohosts);
1.1 christos 296: }
297:
298: static int
299: tcpconnect(char *host)
300: {
301: struct addrinfo hints, *ai, *aitop;
302: char strport[NI_MAXSERV];
303: int gaierr, s = -1;
304:
305: snprintf(strport, sizeof strport, "%d", ssh_port);
306: memset(&hints, 0, sizeof(hints));
307: hints.ai_family = IPv4or6;
308: hints.ai_socktype = SOCK_STREAM;
1.11 christos 309: if ((gaierr = getaddrinfo(host, strport, &hints, &aitop)) != 0) {
310: error("getaddrinfo %s: %s", host, ssh_gai_strerror(gaierr));
311: return -1;
312: }
1.1 christos 313: for (ai = aitop; ai; ai = ai->ai_next) {
314: s = socket(ai->ai_family, ai->ai_socktype, ai->ai_protocol);
315: if (s < 0) {
316: error("socket: %s", strerror(errno));
317: continue;
318: }
319: if (set_nonblock(s) == -1)
320: fatal("%s: set_nonblock(%d)", __func__, s);
321: if (connect(s, ai->ai_addr, ai->ai_addrlen) < 0 &&
322: errno != EINPROGRESS)
323: error("connect (`%s'): %s", host, strerror(errno));
324: else
325: break;
326: close(s);
327: s = -1;
328: }
329: freeaddrinfo(aitop);
330: return s;
331: }
332:
333: static int
334: conalloc(char *iname, char *oname, int keytype)
335: {
336: char *namebase, *name, *namelist;
337: int s;
338:
339: namebase = namelist = xstrdup(iname);
340:
341: do {
342: name = xstrsep(&namelist, ",");
343: if (!name) {
1.9 christos 344: free(namebase);
1.1 christos 345: return (-1);
346: }
347: } while ((s = tcpconnect(name)) < 0);
348:
349: if (s >= maxfd)
350: fatal("conalloc: fdno %d too high", s);
351: if (fdcon[s].c_status)
352: fatal("conalloc: attempt to reuse fdno %d", s);
353:
1.15 christos 354: debug3("%s: oname %s kt %d", __func__, oname, keytype);
1.1 christos 355: fdcon[s].c_fd = s;
356: fdcon[s].c_status = CS_CON;
357: fdcon[s].c_namebase = namebase;
358: fdcon[s].c_name = name;
359: fdcon[s].c_namelist = namelist;
360: fdcon[s].c_output_name = xstrdup(oname);
361: fdcon[s].c_data = (char *) &fdcon[s].c_plen;
362: fdcon[s].c_len = 4;
363: fdcon[s].c_off = 0;
364: fdcon[s].c_keytype = keytype;
365: gettimeofday(&fdcon[s].c_tv, NULL);
366: fdcon[s].c_tv.tv_sec += timeout;
367: TAILQ_INSERT_TAIL(&tq, &fdcon[s], c_link);
368: FD_SET(s, read_wait);
369: ncon++;
370: return (s);
371: }
372:
373: static void
374: confree(int s)
375: {
376: if (s >= maxfd || fdcon[s].c_status == CS_UNUSED)
377: fatal("confree: attempt to free bad fdno %d", s);
1.9 christos 378: free(fdcon[s].c_namebase);
379: free(fdcon[s].c_output_name);
1.1 christos 380: if (fdcon[s].c_status == CS_KEYS)
1.9 christos 381: free(fdcon[s].c_data);
1.1 christos 382: fdcon[s].c_status = CS_UNUSED;
383: fdcon[s].c_keytype = 0;
1.11 christos 384: if (fdcon[s].c_ssh) {
385: ssh_packet_close(fdcon[s].c_ssh);
386: free(fdcon[s].c_ssh);
387: fdcon[s].c_ssh = NULL;
1.19.4.1! snj 388: } else
! 389: close(s);
1.1 christos 390: TAILQ_REMOVE(&tq, &fdcon[s], c_link);
391: FD_CLR(s, read_wait);
392: ncon--;
393: }
394:
395: static void
396: contouch(int s)
397: {
398: TAILQ_REMOVE(&tq, &fdcon[s], c_link);
399: gettimeofday(&fdcon[s].c_tv, NULL);
400: fdcon[s].c_tv.tv_sec += timeout;
401: TAILQ_INSERT_TAIL(&tq, &fdcon[s], c_link);
402: }
403:
404: static int
405: conrecycle(int s)
406: {
407: con *c = &fdcon[s];
408: int ret;
409:
410: ret = conalloc(c->c_namelist, c->c_output_name, c->c_keytype);
411: confree(s);
412: return (ret);
413: }
414:
415: static void
416: congreet(int s)
417: {
418: int n = 0, remote_major = 0, remote_minor = 0;
419: char buf[256], *cp;
420: char remote_version[sizeof buf];
421: size_t bufsiz;
422: con *c = &fdcon[s];
423:
1.19.4.1! snj 424: /* send client banner */
! 425: n = snprintf(buf, sizeof buf, "SSH-%d.%d-OpenSSH-keyscan\r\n",
! 426: PROTOCOL_MAJOR_2, PROTOCOL_MINOR_2);
! 427: if (n < 0 || (size_t)n >= sizeof(buf)) {
! 428: error("snprintf: buffer too small");
! 429: confree(s);
! 430: return;
! 431: }
! 432: if (atomicio(vwrite, s, buf, n) != (size_t)n) {
! 433: error("write (%s): %s", c->c_name, strerror(errno));
! 434: confree(s);
! 435: return;
! 436: }
! 437:
1.1 christos 438: for (;;) {
439: memset(buf, '\0', sizeof(buf));
440: bufsiz = sizeof(buf);
441: cp = buf;
442: while (bufsiz-- &&
443: (n = atomicio(read, s, cp, 1)) == 1 && *cp != '\n') {
444: if (*cp == '\r')
445: *cp = '\n';
446: cp++;
447: }
448: if (n != 1 || strncmp(buf, "SSH-", 4) == 0)
449: break;
450: }
451: if (n == 0) {
452: switch (errno) {
453: case EPIPE:
454: error("%s: Connection closed by remote host", c->c_name);
455: break;
456: case ECONNREFUSED:
457: break;
458: default:
459: error("read (%s): %s", c->c_name, strerror(errno));
460: break;
461: }
462: conrecycle(s);
463: return;
464: }
465: if (*cp != '\n' && *cp != '\r') {
466: error("%s: bad greeting", c->c_name);
467: confree(s);
468: return;
469: }
470: *cp = '\0';
1.11 christos 471: if ((c->c_ssh = ssh_packet_set_connection(NULL, s, s)) == NULL)
472: fatal("ssh_packet_set_connection failed");
473: ssh_packet_set_timeout(c->c_ssh, timeout, 1);
474: ssh_set_app_data(c->c_ssh, c); /* back link */
1.1 christos 475: if (sscanf(buf, "SSH-%d.%d-%[^\n]\n",
476: &remote_major, &remote_minor, remote_version) == 3)
1.11 christos 477: c->c_ssh->compat = compat_datafellows(remote_version);
1.1 christos 478: else
1.11 christos 479: c->c_ssh->compat = 0;
1.19.4.1! snj 480: if (!ssh2_capable(remote_major, remote_minor)) {
! 481: debug("%s doesn't support ssh2", c->c_name);
1.1 christos 482: confree(s);
483: return;
484: }
1.14 christos 485: fprintf(stderr, "# %s:%d %s\n", c->c_name, ssh_port, chop(buf));
1.19.4.1! snj 486: keygrab_ssh2(c);
! 487: confree(s);
1.1 christos 488: }
489:
490: static void
491: conread(int s)
492: {
493: con *c = &fdcon[s];
494: size_t n;
495:
496: if (c->c_status == CS_CON) {
497: congreet(s);
498: return;
499: }
500: n = atomicio(read, s, c->c_data + c->c_off, c->c_len - c->c_off);
501: if (n == 0) {
502: error("read (%s): %s", c->c_name, strerror(errno));
503: confree(s);
504: return;
505: }
506: c->c_off += n;
507:
508: if (c->c_off == c->c_len)
509: switch (c->c_status) {
510: case CS_SIZE:
511: c->c_plen = htonl(c->c_plen);
512: c->c_len = c->c_plen + 8 - (c->c_plen & 7);
513: c->c_off = 0;
514: c->c_data = xmalloc(c->c_len);
515: c->c_status = CS_KEYS;
516: break;
517: default:
518: fatal("conread: invalid status %d", c->c_status);
519: break;
520: }
521:
522: contouch(s);
523: }
524:
525: static void
526: conloop(void)
527: {
528: struct timeval seltime, now;
529: fd_set *r, *e;
530: con *c;
531: int i;
532:
533: gettimeofday(&now, NULL);
534: c = TAILQ_FIRST(&tq);
535:
536: if (c && (c->c_tv.tv_sec > now.tv_sec ||
537: (c->c_tv.tv_sec == now.tv_sec && c->c_tv.tv_usec > now.tv_usec))) {
538: seltime = c->c_tv;
539: seltime.tv_sec -= now.tv_sec;
540: seltime.tv_usec -= now.tv_usec;
541: if (seltime.tv_usec < 0) {
542: seltime.tv_usec += 1000000;
543: seltime.tv_sec--;
544: }
545: } else
1.6 christos 546: timerclear(&seltime);
1.1 christos 547:
548: r = xcalloc(read_wait_nfdset, sizeof(fd_mask));
549: e = xcalloc(read_wait_nfdset, sizeof(fd_mask));
550: memcpy(r, read_wait, read_wait_nfdset * sizeof(fd_mask));
551: memcpy(e, read_wait, read_wait_nfdset * sizeof(fd_mask));
552:
553: while (select(maxfd, r, NULL, e, &seltime) == -1 &&
554: (errno == EAGAIN || errno == EINTR))
555: ;
556:
557: for (i = 0; i < maxfd; i++) {
558: if (FD_ISSET(i, e)) {
559: error("%s: exception!", fdcon[i].c_name);
560: confree(i);
561: } else if (FD_ISSET(i, r))
562: conread(i);
563: }
1.9 christos 564: free(r);
565: free(e);
1.1 christos 566:
567: c = TAILQ_FIRST(&tq);
568: while (c && (c->c_tv.tv_sec < now.tv_sec ||
569: (c->c_tv.tv_sec == now.tv_sec && c->c_tv.tv_usec < now.tv_usec))) {
570: int s = c->c_fd;
571:
572: c = TAILQ_NEXT(c, c_link);
573: conrecycle(s);
574: }
575: }
576:
577: static void
578: do_host(char *host)
579: {
580: char *name = strnnsep(&host, " \t\n");
581: int j;
582:
583: if (name == NULL)
584: return;
1.19.4.1! snj 585: for (j = KT_MIN; j <= KT_MAX; j *= 2) {
1.1 christos 586: if (get_keytypes & j) {
587: while (ncon >= MAXCON)
588: conloop();
589: conalloc(name, *host ? host : name, j);
590: }
591: }
592: }
593:
1.7 joerg 594: __dead void
1.1 christos 595: fatal(const char *fmt,...)
596: {
597: va_list args;
598:
599: va_start(args, fmt);
600: do_log(SYSLOG_LEVEL_FATAL, fmt, args);
601: va_end(args);
1.11 christos 602: exit(255);
1.1 christos 603: }
604:
1.7 joerg 605: __dead static void
1.1 christos 606: usage(void)
607: {
608: fprintf(stderr,
1.15 christos 609: "usage: %s [-46cHv] [-f file] [-p port] [-T timeout] [-t type]\n"
1.1 christos 610: "\t\t [host | addrlist namelist] ...\n",
611: __progname);
612: exit(1);
613: }
614:
615: int
616: main(int argc, char **argv)
617: {
618: int debug_flag = 0, log_level = SYSLOG_LEVEL_INFO;
1.4 adam 619: int opt, fopt_count = 0, j;
620: char *tname, *cp, line[NI_MAXHOST];
621: FILE *fp;
622: u_long linenum;
1.1 christos 623:
624: extern int optind;
625: extern char *optarg;
626:
1.15 christos 627: ssh_malloc_init(); /* must be called before any mallocs */
1.1 christos 628: TAILQ_INIT(&tq);
629:
630: /* Ensure that fds 0, 1 and 2 are open or directed to /dev/null */
631: sanitise_stdfd();
632:
633: if (argc <= 1)
634: usage();
635:
1.15 christos 636: while ((opt = getopt(argc, argv, "cHv46p:T:t:f:")) != -1) {
1.1 christos 637: switch (opt) {
638: case 'H':
639: hash_hosts = 1;
640: break;
1.15 christos 641: case 'c':
642: get_cert = 1;
643: break;
1.1 christos 644: case 'p':
645: ssh_port = a2port(optarg);
646: if (ssh_port <= 0) {
647: fprintf(stderr, "Bad port '%s'\n", optarg);
648: exit(1);
649: }
650: break;
651: case 'T':
652: timeout = convtime(optarg);
653: if (timeout == -1 || timeout == 0) {
654: fprintf(stderr, "Bad timeout '%s'\n", optarg);
655: usage();
656: }
657: break;
658: case 'v':
659: if (!debug_flag) {
660: debug_flag = 1;
661: log_level = SYSLOG_LEVEL_DEBUG1;
662: }
663: else if (log_level < SYSLOG_LEVEL_DEBUG3)
664: log_level++;
665: else
666: fatal("Too high debugging level.");
667: break;
668: case 'f':
669: if (strcmp(optarg, "-") == 0)
670: optarg = NULL;
671: argv[fopt_count++] = optarg;
672: break;
673: case 't':
674: get_keytypes = 0;
675: tname = strtok(optarg, ",");
676: while (tname) {
1.11 christos 677: int type = sshkey_type_from_name(tname);
1.19 christos 678:
1.1 christos 679: switch (type) {
680: case KEY_DSA:
681: get_keytypes |= KT_DSA;
682: break;
1.5 christos 683: case KEY_ECDSA:
684: get_keytypes |= KT_ECDSA;
685: break;
1.1 christos 686: case KEY_RSA:
687: get_keytypes |= KT_RSA;
688: break;
1.10 christos 689: case KEY_ED25519:
690: get_keytypes |= KT_ED25519;
691: break;
1.1 christos 692: case KEY_UNSPEC:
1.19 christos 693: default:
694: fatal("Unknown key type \"%s\"", tname);
1.1 christos 695: }
696: tname = strtok(NULL, ",");
697: }
698: break;
699: case '4':
700: IPv4or6 = AF_INET;
701: break;
702: case '6':
703: IPv4or6 = AF_INET6;
704: break;
705: case '?':
706: default:
707: usage();
708: }
709: }
710: if (optind == argc && !fopt_count)
711: usage();
712:
713: log_init("ssh-keyscan", log_level, SYSLOG_FACILITY_USER, 1);
714:
715: maxfd = fdlim_get(1);
716: if (maxfd < 0)
717: fatal("%s: fdlim_get: bad value", __progname);
718: if (maxfd > MAXMAXFD)
719: maxfd = MAXMAXFD;
720: if (MAXCON <= 0)
721: fatal("%s: not enough file descriptors", __progname);
722: if (maxfd > fdlim_get(0))
723: fdlim_set(maxfd);
724: fdcon = xcalloc(maxfd, sizeof(con));
725:
726: read_wait_nfdset = howmany(maxfd, NFDBITS);
727: read_wait = xcalloc(read_wait_nfdset, sizeof(fd_mask));
728:
1.4 adam 729: for (j = 0; j < fopt_count; j++) {
730: if (argv[j] == NULL)
731: fp = stdin;
732: else if ((fp = fopen(argv[j], "r")) == NULL)
733: fatal("%s: %s: %s", __progname, argv[j],
734: strerror(errno));
735: linenum = 0;
736:
737: while (read_keyfile_line(fp,
738: argv[j] == NULL ? "(stdin)" : argv[j], line, sizeof(line),
739: &linenum) != -1) {
740: /* Chomp off trailing whitespace and comments */
741: if ((cp = strchr(line, '#')) == NULL)
742: cp = line + strlen(line) - 1;
743: while (cp >= line) {
744: if (*cp == ' ' || *cp == '\t' ||
745: *cp == '\n' || *cp == '#')
746: *cp-- = '\0';
747: else
748: break;
749: }
750:
751: /* Skip empty lines */
752: if (*line == '\0')
1.1 christos 753: continue;
1.4 adam 754:
755: do_host(line);
1.1 christos 756: }
1.4 adam 757:
758: if (ferror(fp))
759: fatal("%s: %s: %s", __progname, argv[j],
760: strerror(errno));
761:
762: fclose(fp);
1.1 christos 763: }
764:
765: while (optind < argc)
766: do_host(argv[optind++]);
767:
768: while (ncon > 0)
769: conloop();
770:
771: return (0);
772: }
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