Annotation of src/usr.bin/ssh/ssh-keyscan.c, Revision 1.88
1.88 ! markus 1: /* $OpenBSD: ssh-keyscan.c,v 1.87 2013/05/17 00:13:14 djm Exp $ */
1.1 markus 2: /*
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
1.23 pvalchev 7: * OpenBSD project by leaving this copyright notice intact.
1.1 markus 8: */
9:
1.65 stevesk 10: #include <sys/types.h>
11: #include <sys/socket.h>
1.1 markus 12: #include <sys/queue.h>
1.74 djm 13: #include <sys/time.h>
1.59 stevesk 14: #include <sys/resource.h>
1.58 stevesk 15:
1.69 stevesk 16: #include <openssl/bn.h>
17:
1.1 markus 18: #include <errno.h>
1.67 stevesk 19: #include <netdb.h>
1.58 stevesk 20: #include <setjmp.h>
1.66 stevesk 21: #include <stdarg.h>
1.72 stevesk 22: #include <stdio.h>
1.71 stevesk 23: #include <stdlib.h>
1.73 deraadt 24: #include <signal.h>
1.69 stevesk 25: #include <string.h>
1.68 stevesk 26: #include <unistd.h>
1.1 markus 27:
28: #include "xmalloc.h"
29: #include "ssh.h"
1.10 markus 30: #include "ssh1.h"
1.73 deraadt 31: #include "buffer.h"
1.1 markus 32: #include "key.h"
1.73 deraadt 33: #include "cipher.h"
1.26 markus 34: #include "kex.h"
35: #include "compat.h"
36: #include "myproposal.h"
37: #include "packet.h"
38: #include "dispatch.h"
1.11 markus 39: #include "log.h"
1.18 deraadt 40: #include "atomicio.h"
1.26 markus 41: #include "misc.h"
1.51 djm 42: #include "hostfile.h"
1.1 markus 43:
1.26 markus 44: /* Flag indicating whether IPv4 or IPv6. This can be set on the command line.
45: Default value is AF_UNSPEC means both IPv4 and IPv6. */
46: int IPv4or6 = AF_UNSPEC;
47:
48: int ssh_port = SSH_DEFAULT_PORT;
1.1 markus 49:
1.83 djm 50: #define KT_RSA1 1
51: #define KT_DSA 2
52: #define KT_RSA 4
53: #define KT_ECDSA 8
1.26 markus 54:
1.86 djm 55: int get_keytypes = KT_RSA|KT_ECDSA;/* Get RSA and ECDSA keys by default */
1.1 markus 56:
1.51 djm 57: int hash_hosts = 0; /* Hash hostname on output */
58:
1.1 markus 59: #define MAXMAXFD 256
60:
61: /* The number of seconds after which to give up on a TCP connection */
62: int timeout = 5;
63:
64: int maxfd;
1.18 deraadt 65: #define MAXCON (maxfd - 10)
1.1 markus 66:
1.3 markus 67: extern char *__progname;
1.19 millert 68: fd_set *read_wait;
1.63 djm 69: size_t read_wait_nfdset;
1.1 markus 70: int ncon;
1.26 markus 71: int nonfatal_fatal = 0;
72: jmp_buf kexjmp;
1.29 markus 73: Key *kexjmp_key;
1.1 markus 74:
75: /*
76: * Keep a connection structure for each file descriptor. The state
77: * associated with file descriptor n is held in fdcon[n].
78: */
79: typedef struct Connection {
1.6 markus 80: u_char c_status; /* State of connection on this file desc. */
1.1 markus 81: #define CS_UNUSED 0 /* File descriptor unused */
82: #define CS_CON 1 /* Waiting to connect/read greeting */
83: #define CS_SIZE 2 /* Waiting to read initial packet size */
84: #define CS_KEYS 3 /* Waiting to read public key packet */
85: int c_fd; /* Quick lookup: c->c_fd == c - fdcon */
86: int c_plen; /* Packet length field for ssh packet */
87: int c_len; /* Total bytes which must be read. */
88: int c_off; /* Length of data read so far. */
1.26 markus 89: int c_keytype; /* Only one of KT_RSA1, KT_DSA, or KT_RSA */
1.1 markus 90: char *c_namebase; /* Address to free for c_name and c_namelist */
91: char *c_name; /* Hostname of connection for errors */
92: char *c_namelist; /* Pointer to other possible addresses */
93: char *c_output_name; /* Hostname of connection for output */
94: char *c_data; /* Data read from this fd */
1.26 markus 95: Kex *c_kex; /* The key-exchange struct for ssh2 */
1.1 markus 96: struct timeval c_tv; /* Time at which connection gets aborted */
97: TAILQ_ENTRY(Connection) c_link; /* List of connections in timeout order. */
98: } con;
99:
100: TAILQ_HEAD(conlist, Connection) tq; /* Timeout Queue */
101: con *fdcon;
102:
1.24 itojun 103: static int
1.1 markus 104: fdlim_get(int hard)
105: {
106: struct rlimit rlfd;
1.17 deraadt 107:
1.1 markus 108: if (getrlimit(RLIMIT_NOFILE, &rlfd) < 0)
109: return (-1);
110: if ((hard ? rlfd.rlim_max : rlfd.rlim_cur) == RLIM_INFINITY)
1.46 djm 111: return sysconf(_SC_OPEN_MAX);
1.1 markus 112: else
113: return hard ? rlfd.rlim_max : rlfd.rlim_cur;
114: }
115:
1.24 itojun 116: static int
1.1 markus 117: fdlim_set(int lim)
118: {
119: struct rlimit rlfd;
1.39 deraadt 120:
1.1 markus 121: if (lim <= 0)
122: return (-1);
123: if (getrlimit(RLIMIT_NOFILE, &rlfd) < 0)
124: return (-1);
125: rlfd.rlim_cur = lim;
126: if (setrlimit(RLIMIT_NOFILE, &rlfd) < 0)
127: return (-1);
128: return (0);
129: }
130:
131: /*
132: * This is an strsep function that returns a null field for adjacent
133: * separators. This is the same as the 4.4BSD strsep, but different from the
134: * one in the GNU libc.
135: */
1.24 itojun 136: static char *
1.1 markus 137: xstrsep(char **str, const char *delim)
138: {
139: char *s, *e;
140:
141: if (!**str)
142: return (NULL);
143:
144: s = *str;
145: e = s + strcspn(s, delim);
146:
147: if (*e != '\0')
148: *e++ = '\0';
149: *str = e;
150:
151: return (s);
152: }
153:
154: /*
155: * Get the next non-null token (like GNU strsep). Strsep() will return a
156: * null token for two adjacent separators, so we may have to loop.
157: */
1.24 itojun 158: static char *
1.1 markus 159: strnnsep(char **stringp, char *delim)
160: {
161: char *tok;
162:
163: do {
164: tok = xstrsep(stringp, delim);
165: } while (tok && *tok == '\0');
166: return (tok);
167: }
168:
1.26 markus 169: static Key *
170: keygrab_ssh1(con *c)
1.1 markus 171: {
172: static Key *rsa;
173: static Buffer msg;
174:
175: if (rsa == NULL) {
176: buffer_init(&msg);
177: rsa = key_new(KEY_RSA1);
178: }
1.26 markus 179: buffer_append(&msg, c->c_data, c->c_plen);
180: buffer_consume(&msg, 8 - (c->c_plen & 7)); /* padding */
1.1 markus 181: if (buffer_get_char(&msg) != (int) SSH_SMSG_PUBLIC_KEY) {
1.26 markus 182: error("%s: invalid packet type", c->c_name);
1.1 markus 183: buffer_clear(&msg);
1.26 markus 184: return NULL;
1.1 markus 185: }
186: buffer_consume(&msg, 8); /* cookie */
187:
188: /* server key */
189: (void) buffer_get_int(&msg);
190: buffer_get_bignum(&msg, rsa->rsa->e);
191: buffer_get_bignum(&msg, rsa->rsa->n);
192:
193: /* host key */
194: (void) buffer_get_int(&msg);
195: buffer_get_bignum(&msg, rsa->rsa->e);
196: buffer_get_bignum(&msg, rsa->rsa->n);
1.26 markus 197:
1.1 markus 198: buffer_clear(&msg);
199:
1.26 markus 200: return (rsa);
201: }
202:
203: static int
204: hostjump(Key *hostkey)
205: {
1.29 markus 206: kexjmp_key = hostkey;
207: longjmp(kexjmp, 1);
1.26 markus 208: }
209:
210: static int
211: ssh2_capable(int remote_major, int remote_minor)
212: {
213: switch (remote_major) {
214: case 1:
215: if (remote_minor == 99)
216: return 1;
217: break;
218: case 2:
219: return 1;
220: default:
221: break;
222: }
223: return 0;
224: }
225:
226: static Key *
227: keygrab_ssh2(con *c)
228: {
229: int j;
230:
231: packet_set_connection(c->c_fd, c->c_fd);
232: enable_compat20();
233: myproposal[PROPOSAL_SERVER_HOST_KEY_ALGS] = c->c_keytype == KT_DSA?
1.84 otto 234: "ssh-dss" : (c->c_keytype == KT_RSA ? "ssh-rsa" :
235: "ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521");
1.26 markus 236: c->c_kex = kex_setup(myproposal);
1.41 markus 237: c->c_kex->kex[KEX_DH_GRP1_SHA1] = kexdh_client;
1.48 djm 238: c->c_kex->kex[KEX_DH_GRP14_SHA1] = kexdh_client;
1.41 markus 239: c->c_kex->kex[KEX_DH_GEX_SHA1] = kexgex_client;
1.60 djm 240: c->c_kex->kex[KEX_DH_GEX_SHA256] = kexgex_client;
1.83 djm 241: c->c_kex->kex[KEX_ECDH_SHA2] = kexecdh_client;
1.88 ! markus 242: c->c_kex->kex[KEX_C25519_SHA256] = kexc25519_client;
1.26 markus 243: c->c_kex->verify_host_key = hostjump;
244:
245: if (!(j = setjmp(kexjmp))) {
246: nonfatal_fatal = 1;
247: dispatch_run(DISPATCH_BLOCK, &c->c_kex->done, c->c_kex);
248: fprintf(stderr, "Impossible! dispatch_run() returned!\n");
249: exit(1);
250: }
251: nonfatal_fatal = 0;
1.87 djm 252: free(c->c_kex);
1.26 markus 253: c->c_kex = NULL;
254: packet_close();
255:
1.29 markus 256: return j < 0? NULL : kexjmp_key;
1.26 markus 257: }
258:
259: static void
260: keyprint(con *c, Key *key)
261: {
1.51 djm 262: char *host = c->c_output_name ? c->c_output_name : c->c_name;
263:
1.26 markus 264: if (!key)
265: return;
1.51 djm 266: if (hash_hosts && (host = host_hash(host, NULL, 0)) == NULL)
267: fatal("host_hash failed");
1.26 markus 268:
1.51 djm 269: fprintf(stdout, "%s ", host);
1.26 markus 270: key_write(key, stdout);
1.1 markus 271: fputs("\n", stdout);
272: }
273:
1.24 itojun 274: static int
1.1 markus 275: tcpconnect(char *host)
276: {
277: struct addrinfo hints, *ai, *aitop;
278: char strport[NI_MAXSERV];
279: int gaierr, s = -1;
280:
1.26 markus 281: snprintf(strport, sizeof strport, "%d", ssh_port);
1.1 markus 282: memset(&hints, 0, sizeof(hints));
1.26 markus 283: hints.ai_family = IPv4or6;
1.1 markus 284: hints.ai_socktype = SOCK_STREAM;
285: if ((gaierr = getaddrinfo(host, strport, &hints, &aitop)) != 0)
1.75 dtucker 286: fatal("getaddrinfo %s: %s", host, ssh_gai_strerror(gaierr));
1.1 markus 287: for (ai = aitop; ai; ai = ai->ai_next) {
1.81 dtucker 288: s = socket(ai->ai_family, ai->ai_socktype, ai->ai_protocol);
1.1 markus 289: if (s < 0) {
290: error("socket: %s", strerror(errno));
291: continue;
292: }
1.49 djm 293: if (set_nonblock(s) == -1)
294: fatal("%s: set_nonblock(%d)", __func__, s);
1.1 markus 295: if (connect(s, ai->ai_addr, ai->ai_addrlen) < 0 &&
296: errno != EINPROGRESS)
297: error("connect (`%s'): %s", host, strerror(errno));
298: else
299: break;
300: close(s);
301: s = -1;
302: }
303: freeaddrinfo(aitop);
304: return s;
305: }
306:
1.24 itojun 307: static int
1.26 markus 308: conalloc(char *iname, char *oname, int keytype)
1.1 markus 309: {
1.39 deraadt 310: char *namebase, *name, *namelist;
1.1 markus 311: int s;
312:
313: namebase = namelist = xstrdup(iname);
314:
315: do {
316: name = xstrsep(&namelist, ",");
317: if (!name) {
1.87 djm 318: free(namebase);
1.1 markus 319: return (-1);
320: }
321: } while ((s = tcpconnect(name)) < 0);
322:
323: if (s >= maxfd)
1.4 markus 324: fatal("conalloc: fdno %d too high", s);
1.1 markus 325: if (fdcon[s].c_status)
1.4 markus 326: fatal("conalloc: attempt to reuse fdno %d", s);
1.1 markus 327:
328: fdcon[s].c_fd = s;
329: fdcon[s].c_status = CS_CON;
330: fdcon[s].c_namebase = namebase;
331: fdcon[s].c_name = name;
332: fdcon[s].c_namelist = namelist;
333: fdcon[s].c_output_name = xstrdup(oname);
334: fdcon[s].c_data = (char *) &fdcon[s].c_plen;
335: fdcon[s].c_len = 4;
336: fdcon[s].c_off = 0;
1.26 markus 337: fdcon[s].c_keytype = keytype;
1.1 markus 338: gettimeofday(&fdcon[s].c_tv, NULL);
339: fdcon[s].c_tv.tv_sec += timeout;
340: TAILQ_INSERT_TAIL(&tq, &fdcon[s], c_link);
1.19 millert 341: FD_SET(s, read_wait);
1.1 markus 342: ncon++;
343: return (s);
344: }
345:
1.24 itojun 346: static void
1.1 markus 347: confree(int s)
348: {
349: if (s >= maxfd || fdcon[s].c_status == CS_UNUSED)
1.4 markus 350: fatal("confree: attempt to free bad fdno %d", s);
1.18 deraadt 351: close(s);
1.87 djm 352: free(fdcon[s].c_namebase);
353: free(fdcon[s].c_output_name);
1.1 markus 354: if (fdcon[s].c_status == CS_KEYS)
1.87 djm 355: free(fdcon[s].c_data);
1.1 markus 356: fdcon[s].c_status = CS_UNUSED;
1.26 markus 357: fdcon[s].c_keytype = 0;
1.1 markus 358: TAILQ_REMOVE(&tq, &fdcon[s], c_link);
1.19 millert 359: FD_CLR(s, read_wait);
1.1 markus 360: ncon--;
361: }
362:
1.24 itojun 363: static void
1.1 markus 364: contouch(int s)
365: {
366: TAILQ_REMOVE(&tq, &fdcon[s], c_link);
367: gettimeofday(&fdcon[s].c_tv, NULL);
368: fdcon[s].c_tv.tv_sec += timeout;
369: TAILQ_INSERT_TAIL(&tq, &fdcon[s], c_link);
370: }
371:
1.24 itojun 372: static int
1.1 markus 373: conrecycle(int s)
374: {
1.39 deraadt 375: con *c = &fdcon[s];
1.1 markus 376: int ret;
377:
1.26 markus 378: ret = conalloc(c->c_namelist, c->c_output_name, c->c_keytype);
1.1 markus 379: confree(s);
380: return (ret);
381: }
382:
1.24 itojun 383: static void
1.1 markus 384: congreet(int s)
385: {
1.55 djm 386: int n = 0, remote_major = 0, remote_minor = 0;
1.26 markus 387: char buf[256], *cp;
1.33 markus 388: char remote_version[sizeof buf];
1.55 djm 389: size_t bufsiz;
1.1 markus 390: con *c = &fdcon[s];
391:
1.57 djm 392: for (;;) {
393: memset(buf, '\0', sizeof(buf));
394: bufsiz = sizeof(buf);
395: cp = buf;
396: while (bufsiz-- &&
397: (n = atomicio(read, s, cp, 1)) == 1 && *cp != '\n') {
398: if (*cp == '\r')
399: *cp = '\n';
400: cp++;
401: }
402: if (n != 1 || strncmp(buf, "SSH-", 4) == 0)
403: break;
1.27 markus 404: }
1.54 avsm 405: if (n == 0) {
406: switch (errno) {
407: case EPIPE:
408: error("%s: Connection closed by remote host", c->c_name);
409: break;
410: case ECONNREFUSED:
411: break;
412: default:
1.1 markus 413: error("read (%s): %s", c->c_name, strerror(errno));
1.54 avsm 414: break;
415: }
1.1 markus 416: conrecycle(s);
417: return;
418: }
1.21 millert 419: if (*cp != '\n' && *cp != '\r') {
1.1 markus 420: error("%s: bad greeting", c->c_name);
421: confree(s);
422: return;
423: }
1.21 millert 424: *cp = '\0';
1.33 markus 425: if (sscanf(buf, "SSH-%d.%d-%[^\n]\n",
426: &remote_major, &remote_minor, remote_version) == 3)
427: compat_datafellows(remote_version);
428: else
429: datafellows = 0;
1.26 markus 430: if (c->c_keytype != KT_RSA1) {
431: if (!ssh2_capable(remote_major, remote_minor)) {
432: debug("%s doesn't support ssh2", c->c_name);
433: confree(s);
434: return;
435: }
1.33 markus 436: } else if (remote_major != 1) {
437: debug("%s doesn't support ssh1", c->c_name);
438: confree(s);
439: return;
1.26 markus 440: }
1.27 markus 441: fprintf(stderr, "# %s %s\n", c->c_name, chop(buf));
1.26 markus 442: n = snprintf(buf, sizeof buf, "SSH-%d.%d-OpenSSH-keyscan\r\n",
443: c->c_keytype == KT_RSA1? PROTOCOL_MAJOR_1 : PROTOCOL_MAJOR_2,
444: c->c_keytype == KT_RSA1? PROTOCOL_MINOR_1 : PROTOCOL_MINOR_2);
1.55 djm 445: if (n < 0 || (size_t)n >= sizeof(buf)) {
1.53 moritz 446: error("snprintf: buffer too small");
447: confree(s);
448: return;
449: }
1.55 djm 450: if (atomicio(vwrite, s, buf, n) != (size_t)n) {
1.1 markus 451: error("write (%s): %s", c->c_name, strerror(errno));
452: confree(s);
453: return;
454: }
1.26 markus 455: if (c->c_keytype != KT_RSA1) {
456: keyprint(c, keygrab_ssh2(c));
457: confree(s);
458: return;
459: }
1.1 markus 460: c->c_status = CS_SIZE;
461: contouch(s);
462: }
463:
1.24 itojun 464: static void
1.1 markus 465: conread(int s)
466: {
1.39 deraadt 467: con *c = &fdcon[s];
1.54 avsm 468: size_t n;
1.1 markus 469:
470: if (c->c_status == CS_CON) {
471: congreet(s);
472: return;
473: }
1.50 avsm 474: n = atomicio(read, s, c->c_data + c->c_off, c->c_len - c->c_off);
1.54 avsm 475: if (n == 0) {
1.1 markus 476: error("read (%s): %s", c->c_name, strerror(errno));
477: confree(s);
478: return;
479: }
480: c->c_off += n;
481:
482: if (c->c_off == c->c_len)
483: switch (c->c_status) {
484: case CS_SIZE:
485: c->c_plen = htonl(c->c_plen);
486: c->c_len = c->c_plen + 8 - (c->c_plen & 7);
487: c->c_off = 0;
488: c->c_data = xmalloc(c->c_len);
489: c->c_status = CS_KEYS;
490: break;
491: case CS_KEYS:
1.26 markus 492: keyprint(c, keygrab_ssh1(c));
1.1 markus 493: confree(s);
494: return;
495: default:
1.4 markus 496: fatal("conread: invalid status %d", c->c_status);
1.1 markus 497: break;
498: }
499:
500: contouch(s);
501: }
502:
1.24 itojun 503: static void
1.1 markus 504: conloop(void)
505: {
1.39 deraadt 506: struct timeval seltime, now;
1.19 millert 507: fd_set *r, *e;
1.39 deraadt 508: con *c;
1.1 markus 509: int i;
510:
511: gettimeofday(&now, NULL);
1.36 itojun 512: c = TAILQ_FIRST(&tq);
1.1 markus 513:
1.18 deraadt 514: if (c && (c->c_tv.tv_sec > now.tv_sec ||
515: (c->c_tv.tv_sec == now.tv_sec && c->c_tv.tv_usec > now.tv_usec))) {
1.1 markus 516: seltime = c->c_tv;
517: seltime.tv_sec -= now.tv_sec;
518: seltime.tv_usec -= now.tv_usec;
1.13 itojun 519: if (seltime.tv_usec < 0) {
1.1 markus 520: seltime.tv_usec += 1000000;
521: seltime.tv_sec--;
522: }
523: } else
1.85 okan 524: timerclear(&seltime);
1.1 markus 525:
1.63 djm 526: r = xcalloc(read_wait_nfdset, sizeof(fd_mask));
527: e = xcalloc(read_wait_nfdset, sizeof(fd_mask));
528: memcpy(r, read_wait, read_wait_nfdset * sizeof(fd_mask));
529: memcpy(e, read_wait, read_wait_nfdset * sizeof(fd_mask));
1.19 millert 530:
531: while (select(maxfd, r, NULL, e, &seltime) == -1 &&
1.16 deraadt 532: (errno == EAGAIN || errno == EINTR))
533: ;
534:
1.18 deraadt 535: for (i = 0; i < maxfd; i++) {
1.19 millert 536: if (FD_ISSET(i, e)) {
1.1 markus 537: error("%s: exception!", fdcon[i].c_name);
538: confree(i);
1.19 millert 539: } else if (FD_ISSET(i, r))
1.1 markus 540: conread(i);
1.18 deraadt 541: }
1.87 djm 542: free(r);
543: free(e);
1.1 markus 544:
1.36 itojun 545: c = TAILQ_FIRST(&tq);
1.18 deraadt 546: while (c && (c->c_tv.tv_sec < now.tv_sec ||
547: (c->c_tv.tv_sec == now.tv_sec && c->c_tv.tv_usec < now.tv_usec))) {
1.1 markus 548: int s = c->c_fd;
1.18 deraadt 549:
1.36 itojun 550: c = TAILQ_NEXT(c, c_link);
1.1 markus 551: conrecycle(s);
552: }
553: }
554:
1.26 markus 555: static void
556: do_host(char *host)
1.1 markus 557: {
1.26 markus 558: char *name = strnnsep(&host, " \t\n");
559: int j;
1.1 markus 560:
1.31 markus 561: if (name == NULL)
562: return;
1.84 otto 563: for (j = KT_RSA1; j <= KT_ECDSA; j *= 2) {
1.26 markus 564: if (get_keytypes & j) {
565: while (ncon >= MAXCON)
566: conloop();
567: conalloc(name, *host ? host : name, j);
1.1 markus 568: }
569: }
570: }
571:
1.34 markus 572: void
573: fatal(const char *fmt,...)
1.26 markus 574: {
1.34 markus 575: va_list args;
1.39 deraadt 576:
1.34 markus 577: va_start(args, fmt);
578: do_log(SYSLOG_LEVEL_FATAL, fmt, args);
579: va_end(args);
1.26 markus 580: if (nonfatal_fatal)
581: longjmp(kexjmp, -1);
1.34 markus 582: else
1.45 markus 583: exit(255);
1.26 markus 584: }
585:
586: static void
1.1 markus 587: usage(void)
588: {
1.77 sobrado 589: fprintf(stderr,
590: "usage: %s [-46Hv] [-f file] [-p port] [-T timeout] [-t type]\n"
1.81 dtucker 591: "\t\t [host | addrlist namelist] ...\n",
1.25 jakob 592: __progname);
593: exit(1);
1.1 markus 594: }
595:
596: int
597: main(int argc, char **argv)
598: {
1.26 markus 599: int debug_flag = 0, log_level = SYSLOG_LEVEL_INFO;
1.82 djm 600: int opt, fopt_count = 0, j;
601: char *tname, *cp, line[NI_MAXHOST];
602: FILE *fp;
603: u_long linenum;
1.26 markus 604:
605: extern int optind;
606: extern char *optarg;
1.1 markus 607:
608: TAILQ_INIT(&tq);
1.56 djm 609:
610: /* Ensure that fds 0, 1 and 2 are open or directed to /dev/null */
611: sanitise_stdfd();
1.1 markus 612:
1.26 markus 613: if (argc <= 1)
1.1 markus 614: usage();
615:
1.81 dtucker 616: while ((opt = getopt(argc, argv, "Hv46p:T:t:f:")) != -1) {
1.26 markus 617: switch (opt) {
1.51 djm 618: case 'H':
619: hash_hosts = 1;
620: break;
1.26 markus 621: case 'p':
622: ssh_port = a2port(optarg);
1.78 djm 623: if (ssh_port <= 0) {
1.26 markus 624: fprintf(stderr, "Bad port '%s'\n", optarg);
625: exit(1);
626: }
627: break;
628: case 'T':
1.38 stevesk 629: timeout = convtime(optarg);
630: if (timeout == -1 || timeout == 0) {
631: fprintf(stderr, "Bad timeout '%s'\n", optarg);
1.1 markus 632: usage();
1.38 stevesk 633: }
1.26 markus 634: break;
635: case 'v':
636: if (!debug_flag) {
637: debug_flag = 1;
638: log_level = SYSLOG_LEVEL_DEBUG1;
639: }
640: else if (log_level < SYSLOG_LEVEL_DEBUG3)
641: log_level++;
642: else
643: fatal("Too high debugging level.");
644: break;
645: case 'f':
646: if (strcmp(optarg, "-") == 0)
647: optarg = NULL;
648: argv[fopt_count++] = optarg;
649: break;
650: case 't':
651: get_keytypes = 0;
652: tname = strtok(optarg, ",");
653: while (tname) {
654: int type = key_type_from_name(tname);
655: switch (type) {
656: case KEY_RSA1:
657: get_keytypes |= KT_RSA1;
658: break;
659: case KEY_DSA:
660: get_keytypes |= KT_DSA;
1.83 djm 661: break;
662: case KEY_ECDSA:
663: get_keytypes |= KT_ECDSA;
1.26 markus 664: break;
665: case KEY_RSA:
666: get_keytypes |= KT_RSA;
667: break;
668: case KEY_UNSPEC:
1.32 stevesk 669: fatal("unknown key type %s", tname);
1.26 markus 670: }
671: tname = strtok(NULL, ",");
672: }
673: break;
674: case '4':
675: IPv4or6 = AF_INET;
676: break;
677: case '6':
678: IPv4or6 = AF_INET6;
679: break;
680: case '?':
681: default:
682: usage();
1.1 markus 683: }
684: }
1.26 markus 685: if (optind == argc && !fopt_count)
1.1 markus 686: usage();
687:
1.26 markus 688: log_init("ssh-keyscan", log_level, SYSLOG_FACILITY_USER, 1);
689:
1.1 markus 690: maxfd = fdlim_get(1);
691: if (maxfd < 0)
1.4 markus 692: fatal("%s: fdlim_get: bad value", __progname);
1.1 markus 693: if (maxfd > MAXMAXFD)
694: maxfd = MAXMAXFD;
1.18 deraadt 695: if (MAXCON <= 0)
1.4 markus 696: fatal("%s: not enough file descriptors", __progname);
1.1 markus 697: if (maxfd > fdlim_get(0))
698: fdlim_set(maxfd);
1.63 djm 699: fdcon = xcalloc(maxfd, sizeof(con));
1.19 millert 700:
1.63 djm 701: read_wait_nfdset = howmany(maxfd, NFDBITS);
702: read_wait = xcalloc(read_wait_nfdset, sizeof(fd_mask));
1.1 markus 703:
1.82 djm 704: for (j = 0; j < fopt_count; j++) {
705: if (argv[j] == NULL)
706: fp = stdin;
707: else if ((fp = fopen(argv[j], "r")) == NULL)
708: fatal("%s: %s: %s", __progname, argv[j],
709: strerror(errno));
710: linenum = 0;
711:
712: while (read_keyfile_line(fp,
713: argv[j] == NULL ? "(stdin)" : argv[j], line, sizeof(line),
714: &linenum) != -1) {
715: /* Chomp off trailing whitespace and comments */
716: if ((cp = strchr(line, '#')) == NULL)
717: cp = line + strlen(line) - 1;
718: while (cp >= line) {
719: if (*cp == ' ' || *cp == '\t' ||
720: *cp == '\n' || *cp == '#')
721: *cp-- = '\0';
722: else
723: break;
724: }
725:
726: /* Skip empty lines */
727: if (*line == '\0')
1.28 danh 728: continue;
1.82 djm 729:
730: do_host(line);
1.26 markus 731: }
1.82 djm 732:
733: if (ferror(fp))
734: fatal("%s: %s: %s", __progname, argv[j],
735: strerror(errno));
736:
737: fclose(fp);
1.26 markus 738: }
739:
740: while (optind < argc)
741: do_host(argv[optind++]);
1.1 markus 742:
743: while (ncon > 0)
744: conloop();
745:
746: return (0);
747: }
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