Annotation of src/usr.bin/ssh/ssh-keyscan.c, Revision 1.90
1.90 ! djm 1: /* $OpenBSD: ssh-keyscan.c,v 1.89 2013/12/06 13:39:49 markus 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
1.89 markus 54: #define KT_ED25519 16
1.26 markus 55:
1.90 ! djm 56: int get_keytypes = KT_RSA|KT_ECDSA|KT_ED25519;
1.1 markus 57:
1.51 djm 58: int hash_hosts = 0; /* Hash hostname on output */
59:
1.1 markus 60: #define MAXMAXFD 256
61:
62: /* The number of seconds after which to give up on a TCP connection */
63: int timeout = 5;
64:
65: int maxfd;
1.18 deraadt 66: #define MAXCON (maxfd - 10)
1.1 markus 67:
1.3 markus 68: extern char *__progname;
1.19 millert 69: fd_set *read_wait;
1.63 djm 70: size_t read_wait_nfdset;
1.1 markus 71: int ncon;
1.26 markus 72: int nonfatal_fatal = 0;
73: jmp_buf kexjmp;
1.29 markus 74: Key *kexjmp_key;
1.1 markus 75:
76: /*
77: * Keep a connection structure for each file descriptor. The state
78: * associated with file descriptor n is held in fdcon[n].
79: */
80: typedef struct Connection {
1.6 markus 81: u_char c_status; /* State of connection on this file desc. */
1.1 markus 82: #define CS_UNUSED 0 /* File descriptor unused */
83: #define CS_CON 1 /* Waiting to connect/read greeting */
84: #define CS_SIZE 2 /* Waiting to read initial packet size */
85: #define CS_KEYS 3 /* Waiting to read public key packet */
86: int c_fd; /* Quick lookup: c->c_fd == c - fdcon */
87: int c_plen; /* Packet length field for ssh packet */
88: int c_len; /* Total bytes which must be read. */
89: int c_off; /* Length of data read so far. */
1.26 markus 90: int c_keytype; /* Only one of KT_RSA1, KT_DSA, or KT_RSA */
1.1 markus 91: char *c_namebase; /* Address to free for c_name and c_namelist */
92: char *c_name; /* Hostname of connection for errors */
93: char *c_namelist; /* Pointer to other possible addresses */
94: char *c_output_name; /* Hostname of connection for output */
95: char *c_data; /* Data read from this fd */
1.26 markus 96: Kex *c_kex; /* The key-exchange struct for ssh2 */
1.1 markus 97: struct timeval c_tv; /* Time at which connection gets aborted */
98: TAILQ_ENTRY(Connection) c_link; /* List of connections in timeout order. */
99: } con;
100:
101: TAILQ_HEAD(conlist, Connection) tq; /* Timeout Queue */
102: con *fdcon;
103:
1.24 itojun 104: static int
1.1 markus 105: fdlim_get(int hard)
106: {
107: struct rlimit rlfd;
1.17 deraadt 108:
1.1 markus 109: if (getrlimit(RLIMIT_NOFILE, &rlfd) < 0)
110: return (-1);
111: if ((hard ? rlfd.rlim_max : rlfd.rlim_cur) == RLIM_INFINITY)
1.46 djm 112: return sysconf(_SC_OPEN_MAX);
1.1 markus 113: else
114: return hard ? rlfd.rlim_max : rlfd.rlim_cur;
115: }
116:
1.24 itojun 117: static int
1.1 markus 118: fdlim_set(int lim)
119: {
120: struct rlimit rlfd;
1.39 deraadt 121:
1.1 markus 122: if (lim <= 0)
123: return (-1);
124: if (getrlimit(RLIMIT_NOFILE, &rlfd) < 0)
125: return (-1);
126: rlfd.rlim_cur = lim;
127: if (setrlimit(RLIMIT_NOFILE, &rlfd) < 0)
128: return (-1);
129: return (0);
130: }
131:
132: /*
133: * This is an strsep function that returns a null field for adjacent
134: * separators. This is the same as the 4.4BSD strsep, but different from the
135: * one in the GNU libc.
136: */
1.24 itojun 137: static char *
1.1 markus 138: xstrsep(char **str, const char *delim)
139: {
140: char *s, *e;
141:
142: if (!**str)
143: return (NULL);
144:
145: s = *str;
146: e = s + strcspn(s, delim);
147:
148: if (*e != '\0')
149: *e++ = '\0';
150: *str = e;
151:
152: return (s);
153: }
154:
155: /*
156: * Get the next non-null token (like GNU strsep). Strsep() will return a
157: * null token for two adjacent separators, so we may have to loop.
158: */
1.24 itojun 159: static char *
1.1 markus 160: strnnsep(char **stringp, char *delim)
161: {
162: char *tok;
163:
164: do {
165: tok = xstrsep(stringp, delim);
166: } while (tok && *tok == '\0');
167: return (tok);
168: }
169:
1.26 markus 170: static Key *
171: keygrab_ssh1(con *c)
1.1 markus 172: {
173: static Key *rsa;
174: static Buffer msg;
175:
176: if (rsa == NULL) {
177: buffer_init(&msg);
178: rsa = key_new(KEY_RSA1);
179: }
1.26 markus 180: buffer_append(&msg, c->c_data, c->c_plen);
181: buffer_consume(&msg, 8 - (c->c_plen & 7)); /* padding */
1.1 markus 182: if (buffer_get_char(&msg) != (int) SSH_SMSG_PUBLIC_KEY) {
1.26 markus 183: error("%s: invalid packet type", c->c_name);
1.1 markus 184: buffer_clear(&msg);
1.26 markus 185: return NULL;
1.1 markus 186: }
187: buffer_consume(&msg, 8); /* cookie */
188:
189: /* server key */
190: (void) buffer_get_int(&msg);
191: buffer_get_bignum(&msg, rsa->rsa->e);
192: buffer_get_bignum(&msg, rsa->rsa->n);
193:
194: /* host key */
195: (void) buffer_get_int(&msg);
196: buffer_get_bignum(&msg, rsa->rsa->e);
197: buffer_get_bignum(&msg, rsa->rsa->n);
1.26 markus 198:
1.1 markus 199: buffer_clear(&msg);
200:
1.26 markus 201: return (rsa);
202: }
203:
204: static int
205: hostjump(Key *hostkey)
206: {
1.29 markus 207: kexjmp_key = hostkey;
208: longjmp(kexjmp, 1);
1.26 markus 209: }
210:
211: static int
212: ssh2_capable(int remote_major, int remote_minor)
213: {
214: switch (remote_major) {
215: case 1:
216: if (remote_minor == 99)
217: return 1;
218: break;
219: case 2:
220: return 1;
221: default:
222: break;
223: }
224: return 0;
225: }
226:
227: static Key *
228: keygrab_ssh2(con *c)
229: {
230: int j;
231:
232: packet_set_connection(c->c_fd, c->c_fd);
233: enable_compat20();
1.89 markus 234: myproposal[PROPOSAL_SERVER_HOST_KEY_ALGS] =
235: c->c_keytype == KT_DSA ? "ssh-dss" :
236: (c->c_keytype == KT_RSA ? "ssh-rsa" :
237: (c->c_keytype == KT_ED25519 ? "ssh-ed25519" :
238: "ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521"));
1.26 markus 239: c->c_kex = kex_setup(myproposal);
1.41 markus 240: c->c_kex->kex[KEX_DH_GRP1_SHA1] = kexdh_client;
1.48 djm 241: c->c_kex->kex[KEX_DH_GRP14_SHA1] = kexdh_client;
1.41 markus 242: c->c_kex->kex[KEX_DH_GEX_SHA1] = kexgex_client;
1.60 djm 243: c->c_kex->kex[KEX_DH_GEX_SHA256] = kexgex_client;
1.83 djm 244: c->c_kex->kex[KEX_ECDH_SHA2] = kexecdh_client;
1.88 markus 245: c->c_kex->kex[KEX_C25519_SHA256] = kexc25519_client;
1.26 markus 246: c->c_kex->verify_host_key = hostjump;
247:
248: if (!(j = setjmp(kexjmp))) {
249: nonfatal_fatal = 1;
250: dispatch_run(DISPATCH_BLOCK, &c->c_kex->done, c->c_kex);
251: fprintf(stderr, "Impossible! dispatch_run() returned!\n");
252: exit(1);
253: }
254: nonfatal_fatal = 0;
1.87 djm 255: free(c->c_kex);
1.26 markus 256: c->c_kex = NULL;
257: packet_close();
258:
1.29 markus 259: return j < 0? NULL : kexjmp_key;
1.26 markus 260: }
261:
262: static void
263: keyprint(con *c, Key *key)
264: {
1.51 djm 265: char *host = c->c_output_name ? c->c_output_name : c->c_name;
266:
1.26 markus 267: if (!key)
268: return;
1.51 djm 269: if (hash_hosts && (host = host_hash(host, NULL, 0)) == NULL)
270: fatal("host_hash failed");
1.26 markus 271:
1.51 djm 272: fprintf(stdout, "%s ", host);
1.26 markus 273: key_write(key, stdout);
1.1 markus 274: fputs("\n", stdout);
275: }
276:
1.24 itojun 277: static int
1.1 markus 278: tcpconnect(char *host)
279: {
280: struct addrinfo hints, *ai, *aitop;
281: char strport[NI_MAXSERV];
282: int gaierr, s = -1;
283:
1.26 markus 284: snprintf(strport, sizeof strport, "%d", ssh_port);
1.1 markus 285: memset(&hints, 0, sizeof(hints));
1.26 markus 286: hints.ai_family = IPv4or6;
1.1 markus 287: hints.ai_socktype = SOCK_STREAM;
288: if ((gaierr = getaddrinfo(host, strport, &hints, &aitop)) != 0)
1.75 dtucker 289: fatal("getaddrinfo %s: %s", host, ssh_gai_strerror(gaierr));
1.1 markus 290: for (ai = aitop; ai; ai = ai->ai_next) {
1.81 dtucker 291: s = socket(ai->ai_family, ai->ai_socktype, ai->ai_protocol);
1.1 markus 292: if (s < 0) {
293: error("socket: %s", strerror(errno));
294: continue;
295: }
1.49 djm 296: if (set_nonblock(s) == -1)
297: fatal("%s: set_nonblock(%d)", __func__, s);
1.1 markus 298: if (connect(s, ai->ai_addr, ai->ai_addrlen) < 0 &&
299: errno != EINPROGRESS)
300: error("connect (`%s'): %s", host, strerror(errno));
301: else
302: break;
303: close(s);
304: s = -1;
305: }
306: freeaddrinfo(aitop);
307: return s;
308: }
309:
1.24 itojun 310: static int
1.26 markus 311: conalloc(char *iname, char *oname, int keytype)
1.1 markus 312: {
1.39 deraadt 313: char *namebase, *name, *namelist;
1.1 markus 314: int s;
315:
316: namebase = namelist = xstrdup(iname);
317:
318: do {
319: name = xstrsep(&namelist, ",");
320: if (!name) {
1.87 djm 321: free(namebase);
1.1 markus 322: return (-1);
323: }
324: } while ((s = tcpconnect(name)) < 0);
325:
326: if (s >= maxfd)
1.4 markus 327: fatal("conalloc: fdno %d too high", s);
1.1 markus 328: if (fdcon[s].c_status)
1.4 markus 329: fatal("conalloc: attempt to reuse fdno %d", s);
1.1 markus 330:
331: fdcon[s].c_fd = s;
332: fdcon[s].c_status = CS_CON;
333: fdcon[s].c_namebase = namebase;
334: fdcon[s].c_name = name;
335: fdcon[s].c_namelist = namelist;
336: fdcon[s].c_output_name = xstrdup(oname);
337: fdcon[s].c_data = (char *) &fdcon[s].c_plen;
338: fdcon[s].c_len = 4;
339: fdcon[s].c_off = 0;
1.26 markus 340: fdcon[s].c_keytype = keytype;
1.1 markus 341: gettimeofday(&fdcon[s].c_tv, NULL);
342: fdcon[s].c_tv.tv_sec += timeout;
343: TAILQ_INSERT_TAIL(&tq, &fdcon[s], c_link);
1.19 millert 344: FD_SET(s, read_wait);
1.1 markus 345: ncon++;
346: return (s);
347: }
348:
1.24 itojun 349: static void
1.1 markus 350: confree(int s)
351: {
352: if (s >= maxfd || fdcon[s].c_status == CS_UNUSED)
1.4 markus 353: fatal("confree: attempt to free bad fdno %d", s);
1.18 deraadt 354: close(s);
1.87 djm 355: free(fdcon[s].c_namebase);
356: free(fdcon[s].c_output_name);
1.1 markus 357: if (fdcon[s].c_status == CS_KEYS)
1.87 djm 358: free(fdcon[s].c_data);
1.1 markus 359: fdcon[s].c_status = CS_UNUSED;
1.26 markus 360: fdcon[s].c_keytype = 0;
1.1 markus 361: TAILQ_REMOVE(&tq, &fdcon[s], c_link);
1.19 millert 362: FD_CLR(s, read_wait);
1.1 markus 363: ncon--;
364: }
365:
1.24 itojun 366: static void
1.1 markus 367: contouch(int s)
368: {
369: TAILQ_REMOVE(&tq, &fdcon[s], c_link);
370: gettimeofday(&fdcon[s].c_tv, NULL);
371: fdcon[s].c_tv.tv_sec += timeout;
372: TAILQ_INSERT_TAIL(&tq, &fdcon[s], c_link);
373: }
374:
1.24 itojun 375: static int
1.1 markus 376: conrecycle(int s)
377: {
1.39 deraadt 378: con *c = &fdcon[s];
1.1 markus 379: int ret;
380:
1.26 markus 381: ret = conalloc(c->c_namelist, c->c_output_name, c->c_keytype);
1.1 markus 382: confree(s);
383: return (ret);
384: }
385:
1.24 itojun 386: static void
1.1 markus 387: congreet(int s)
388: {
1.55 djm 389: int n = 0, remote_major = 0, remote_minor = 0;
1.26 markus 390: char buf[256], *cp;
1.33 markus 391: char remote_version[sizeof buf];
1.55 djm 392: size_t bufsiz;
1.1 markus 393: con *c = &fdcon[s];
394:
1.57 djm 395: for (;;) {
396: memset(buf, '\0', sizeof(buf));
397: bufsiz = sizeof(buf);
398: cp = buf;
399: while (bufsiz-- &&
400: (n = atomicio(read, s, cp, 1)) == 1 && *cp != '\n') {
401: if (*cp == '\r')
402: *cp = '\n';
403: cp++;
404: }
405: if (n != 1 || strncmp(buf, "SSH-", 4) == 0)
406: break;
1.27 markus 407: }
1.54 avsm 408: if (n == 0) {
409: switch (errno) {
410: case EPIPE:
411: error("%s: Connection closed by remote host", c->c_name);
412: break;
413: case ECONNREFUSED:
414: break;
415: default:
1.1 markus 416: error("read (%s): %s", c->c_name, strerror(errno));
1.54 avsm 417: break;
418: }
1.1 markus 419: conrecycle(s);
420: return;
421: }
1.21 millert 422: if (*cp != '\n' && *cp != '\r') {
1.1 markus 423: error("%s: bad greeting", c->c_name);
424: confree(s);
425: return;
426: }
1.21 millert 427: *cp = '\0';
1.33 markus 428: if (sscanf(buf, "SSH-%d.%d-%[^\n]\n",
429: &remote_major, &remote_minor, remote_version) == 3)
430: compat_datafellows(remote_version);
431: else
432: datafellows = 0;
1.26 markus 433: if (c->c_keytype != KT_RSA1) {
434: if (!ssh2_capable(remote_major, remote_minor)) {
435: debug("%s doesn't support ssh2", c->c_name);
436: confree(s);
437: return;
438: }
1.33 markus 439: } else if (remote_major != 1) {
440: debug("%s doesn't support ssh1", c->c_name);
441: confree(s);
442: return;
1.26 markus 443: }
1.27 markus 444: fprintf(stderr, "# %s %s\n", c->c_name, chop(buf));
1.26 markus 445: n = snprintf(buf, sizeof buf, "SSH-%d.%d-OpenSSH-keyscan\r\n",
446: c->c_keytype == KT_RSA1? PROTOCOL_MAJOR_1 : PROTOCOL_MAJOR_2,
447: c->c_keytype == KT_RSA1? PROTOCOL_MINOR_1 : PROTOCOL_MINOR_2);
1.55 djm 448: if (n < 0 || (size_t)n >= sizeof(buf)) {
1.53 moritz 449: error("snprintf: buffer too small");
450: confree(s);
451: return;
452: }
1.55 djm 453: if (atomicio(vwrite, s, buf, n) != (size_t)n) {
1.1 markus 454: error("write (%s): %s", c->c_name, strerror(errno));
455: confree(s);
456: return;
457: }
1.26 markus 458: if (c->c_keytype != KT_RSA1) {
459: keyprint(c, keygrab_ssh2(c));
460: confree(s);
461: return;
462: }
1.1 markus 463: c->c_status = CS_SIZE;
464: contouch(s);
465: }
466:
1.24 itojun 467: static void
1.1 markus 468: conread(int s)
469: {
1.39 deraadt 470: con *c = &fdcon[s];
1.54 avsm 471: size_t n;
1.1 markus 472:
473: if (c->c_status == CS_CON) {
474: congreet(s);
475: return;
476: }
1.50 avsm 477: n = atomicio(read, s, c->c_data + c->c_off, c->c_len - c->c_off);
1.54 avsm 478: if (n == 0) {
1.1 markus 479: error("read (%s): %s", c->c_name, strerror(errno));
480: confree(s);
481: return;
482: }
483: c->c_off += n;
484:
485: if (c->c_off == c->c_len)
486: switch (c->c_status) {
487: case CS_SIZE:
488: c->c_plen = htonl(c->c_plen);
489: c->c_len = c->c_plen + 8 - (c->c_plen & 7);
490: c->c_off = 0;
491: c->c_data = xmalloc(c->c_len);
492: c->c_status = CS_KEYS;
493: break;
494: case CS_KEYS:
1.26 markus 495: keyprint(c, keygrab_ssh1(c));
1.1 markus 496: confree(s);
497: return;
498: default:
1.4 markus 499: fatal("conread: invalid status %d", c->c_status);
1.1 markus 500: break;
501: }
502:
503: contouch(s);
504: }
505:
1.24 itojun 506: static void
1.1 markus 507: conloop(void)
508: {
1.39 deraadt 509: struct timeval seltime, now;
1.19 millert 510: fd_set *r, *e;
1.39 deraadt 511: con *c;
1.1 markus 512: int i;
513:
514: gettimeofday(&now, NULL);
1.36 itojun 515: c = TAILQ_FIRST(&tq);
1.1 markus 516:
1.18 deraadt 517: if (c && (c->c_tv.tv_sec > now.tv_sec ||
518: (c->c_tv.tv_sec == now.tv_sec && c->c_tv.tv_usec > now.tv_usec))) {
1.1 markus 519: seltime = c->c_tv;
520: seltime.tv_sec -= now.tv_sec;
521: seltime.tv_usec -= now.tv_usec;
1.13 itojun 522: if (seltime.tv_usec < 0) {
1.1 markus 523: seltime.tv_usec += 1000000;
524: seltime.tv_sec--;
525: }
526: } else
1.85 okan 527: timerclear(&seltime);
1.1 markus 528:
1.63 djm 529: r = xcalloc(read_wait_nfdset, sizeof(fd_mask));
530: e = xcalloc(read_wait_nfdset, sizeof(fd_mask));
531: memcpy(r, read_wait, read_wait_nfdset * sizeof(fd_mask));
532: memcpy(e, read_wait, read_wait_nfdset * sizeof(fd_mask));
1.19 millert 533:
534: while (select(maxfd, r, NULL, e, &seltime) == -1 &&
1.16 deraadt 535: (errno == EAGAIN || errno == EINTR))
536: ;
537:
1.18 deraadt 538: for (i = 0; i < maxfd; i++) {
1.19 millert 539: if (FD_ISSET(i, e)) {
1.1 markus 540: error("%s: exception!", fdcon[i].c_name);
541: confree(i);
1.19 millert 542: } else if (FD_ISSET(i, r))
1.1 markus 543: conread(i);
1.18 deraadt 544: }
1.87 djm 545: free(r);
546: free(e);
1.1 markus 547:
1.36 itojun 548: c = TAILQ_FIRST(&tq);
1.18 deraadt 549: while (c && (c->c_tv.tv_sec < now.tv_sec ||
550: (c->c_tv.tv_sec == now.tv_sec && c->c_tv.tv_usec < now.tv_usec))) {
1.1 markus 551: int s = c->c_fd;
1.18 deraadt 552:
1.36 itojun 553: c = TAILQ_NEXT(c, c_link);
1.1 markus 554: conrecycle(s);
555: }
556: }
557:
1.26 markus 558: static void
559: do_host(char *host)
1.1 markus 560: {
1.26 markus 561: char *name = strnnsep(&host, " \t\n");
562: int j;
1.1 markus 563:
1.31 markus 564: if (name == NULL)
565: return;
1.89 markus 566: for (j = KT_RSA1; j <= KT_ED25519; j *= 2) {
1.26 markus 567: if (get_keytypes & j) {
568: while (ncon >= MAXCON)
569: conloop();
570: conalloc(name, *host ? host : name, j);
1.1 markus 571: }
572: }
573: }
574:
1.34 markus 575: void
576: fatal(const char *fmt,...)
1.26 markus 577: {
1.34 markus 578: va_list args;
1.39 deraadt 579:
1.34 markus 580: va_start(args, fmt);
581: do_log(SYSLOG_LEVEL_FATAL, fmt, args);
582: va_end(args);
1.26 markus 583: if (nonfatal_fatal)
584: longjmp(kexjmp, -1);
1.34 markus 585: else
1.45 markus 586: exit(255);
1.26 markus 587: }
588:
589: static void
1.1 markus 590: usage(void)
591: {
1.77 sobrado 592: fprintf(stderr,
593: "usage: %s [-46Hv] [-f file] [-p port] [-T timeout] [-t type]\n"
1.81 dtucker 594: "\t\t [host | addrlist namelist] ...\n",
1.25 jakob 595: __progname);
596: exit(1);
1.1 markus 597: }
598:
599: int
600: main(int argc, char **argv)
601: {
1.26 markus 602: int debug_flag = 0, log_level = SYSLOG_LEVEL_INFO;
1.82 djm 603: int opt, fopt_count = 0, j;
604: char *tname, *cp, line[NI_MAXHOST];
605: FILE *fp;
606: u_long linenum;
1.26 markus 607:
608: extern int optind;
609: extern char *optarg;
1.1 markus 610:
611: TAILQ_INIT(&tq);
1.56 djm 612:
613: /* Ensure that fds 0, 1 and 2 are open or directed to /dev/null */
614: sanitise_stdfd();
1.1 markus 615:
1.26 markus 616: if (argc <= 1)
1.1 markus 617: usage();
618:
1.81 dtucker 619: while ((opt = getopt(argc, argv, "Hv46p:T:t:f:")) != -1) {
1.26 markus 620: switch (opt) {
1.51 djm 621: case 'H':
622: hash_hosts = 1;
623: break;
1.26 markus 624: case 'p':
625: ssh_port = a2port(optarg);
1.78 djm 626: if (ssh_port <= 0) {
1.26 markus 627: fprintf(stderr, "Bad port '%s'\n", optarg);
628: exit(1);
629: }
630: break;
631: case 'T':
1.38 stevesk 632: timeout = convtime(optarg);
633: if (timeout == -1 || timeout == 0) {
634: fprintf(stderr, "Bad timeout '%s'\n", optarg);
1.1 markus 635: usage();
1.38 stevesk 636: }
1.26 markus 637: break;
638: case 'v':
639: if (!debug_flag) {
640: debug_flag = 1;
641: log_level = SYSLOG_LEVEL_DEBUG1;
642: }
643: else if (log_level < SYSLOG_LEVEL_DEBUG3)
644: log_level++;
645: else
646: fatal("Too high debugging level.");
647: break;
648: case 'f':
649: if (strcmp(optarg, "-") == 0)
650: optarg = NULL;
651: argv[fopt_count++] = optarg;
652: break;
653: case 't':
654: get_keytypes = 0;
655: tname = strtok(optarg, ",");
656: while (tname) {
657: int type = key_type_from_name(tname);
658: switch (type) {
659: case KEY_RSA1:
660: get_keytypes |= KT_RSA1;
661: break;
662: case KEY_DSA:
663: get_keytypes |= KT_DSA;
1.83 djm 664: break;
665: case KEY_ECDSA:
666: get_keytypes |= KT_ECDSA;
1.26 markus 667: break;
668: case KEY_RSA:
669: get_keytypes |= KT_RSA;
1.89 markus 670: break;
671: case KEY_ED25519:
672: get_keytypes |= KT_ED25519;
1.26 markus 673: break;
674: case KEY_UNSPEC:
1.32 stevesk 675: fatal("unknown key type %s", tname);
1.26 markus 676: }
677: tname = strtok(NULL, ",");
678: }
679: break;
680: case '4':
681: IPv4or6 = AF_INET;
682: break;
683: case '6':
684: IPv4or6 = AF_INET6;
685: break;
686: case '?':
687: default:
688: usage();
1.1 markus 689: }
690: }
1.26 markus 691: if (optind == argc && !fopt_count)
1.1 markus 692: usage();
693:
1.26 markus 694: log_init("ssh-keyscan", log_level, SYSLOG_FACILITY_USER, 1);
695:
1.1 markus 696: maxfd = fdlim_get(1);
697: if (maxfd < 0)
1.4 markus 698: fatal("%s: fdlim_get: bad value", __progname);
1.1 markus 699: if (maxfd > MAXMAXFD)
700: maxfd = MAXMAXFD;
1.18 deraadt 701: if (MAXCON <= 0)
1.4 markus 702: fatal("%s: not enough file descriptors", __progname);
1.1 markus 703: if (maxfd > fdlim_get(0))
704: fdlim_set(maxfd);
1.63 djm 705: fdcon = xcalloc(maxfd, sizeof(con));
1.19 millert 706:
1.63 djm 707: read_wait_nfdset = howmany(maxfd, NFDBITS);
708: read_wait = xcalloc(read_wait_nfdset, sizeof(fd_mask));
1.1 markus 709:
1.82 djm 710: for (j = 0; j < fopt_count; j++) {
711: if (argv[j] == NULL)
712: fp = stdin;
713: else if ((fp = fopen(argv[j], "r")) == NULL)
714: fatal("%s: %s: %s", __progname, argv[j],
715: strerror(errno));
716: linenum = 0;
717:
718: while (read_keyfile_line(fp,
719: argv[j] == NULL ? "(stdin)" : argv[j], line, sizeof(line),
720: &linenum) != -1) {
721: /* Chomp off trailing whitespace and comments */
722: if ((cp = strchr(line, '#')) == NULL)
723: cp = line + strlen(line) - 1;
724: while (cp >= line) {
725: if (*cp == ' ' || *cp == '\t' ||
726: *cp == '\n' || *cp == '#')
727: *cp-- = '\0';
728: else
729: break;
730: }
731:
732: /* Skip empty lines */
733: if (*line == '\0')
1.28 danh 734: continue;
1.82 djm 735:
736: do_host(line);
1.26 markus 737: }
1.82 djm 738:
739: if (ferror(fp))
740: fatal("%s: %s: %s", __progname, argv[j],
741: strerror(errno));
742:
743: fclose(fp);
1.26 markus 744: }
745:
746: while (optind < argc)
747: do_host(argv[optind++]);
1.1 markus 748:
749: while (ncon > 0)
750: conloop();
751:
752: return (0);
753: }
![[BACK]](/icons/back.gif){kind=icon}
Return to ssh-keyscan.c CVS log ![[TXT]](/icons/text.gif){kind=icon}
![[DIR]](/icons/dir.gif){kind=icon}
Up to [local] / src / usr.bin / ssh