Annotation of src/crypto/external/bsd/openssh/dist/ssh-keyscan.c, Revision 1.1.1.21
1.1.1.21! christos 1: /* $OpenBSD: ssh-keyscan.c,v 1.145 2022/01/21 00:53:40 deraadt Exp $ */
1.1 christos 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
7: * OpenBSD project by leaving this copyright notice intact.
8: */
9:
10: #include <sys/types.h>
11: #include <sys/socket.h>
12: #include <sys/queue.h>
13: #include <sys/time.h>
14: #include <sys/resource.h>
15:
1.1.1.17 christos 16: #ifdef WITH_OPENSSL
1.1 christos 17: #include <openssl/bn.h>
1.1.1.17 christos 18: #endif
1.1 christos 19:
20: #include <errno.h>
21: #include <netdb.h>
22: #include <stdarg.h>
23: #include <stdio.h>
24: #include <stdlib.h>
1.1.1.21! christos 25: #include <poll.h>
1.1 christos 26: #include <signal.h>
27: #include <string.h>
28: #include <unistd.h>
29:
30: #include "xmalloc.h"
31: #include "ssh.h"
1.1.1.8 christos 32: #include "sshbuf.h"
33: #include "sshkey.h"
1.1 christos 34: #include "cipher.h"
35: #include "kex.h"
36: #include "compat.h"
37: #include "myproposal.h"
38: #include "packet.h"
39: #include "dispatch.h"
40: #include "log.h"
41: #include "atomicio.h"
42: #include "misc.h"
43: #include "hostfile.h"
1.1.1.8 christos 44: #include "ssherr.h"
45: #include "ssh_api.h"
1.1.1.14 christos 46: #include "dns.h"
1.1 christos 47:
48: /* Flag indicating whether IPv4 or IPv6. This can be set on the command line.
49: Default value is AF_UNSPEC means both IPv4 and IPv6. */
50: int IPv4or6 = AF_UNSPEC;
51:
52: int ssh_port = SSH_DEFAULT_PORT;
53:
1.1.1.13 christos 54: #define KT_DSA (1)
55: #define KT_RSA (1<<1)
56: #define KT_ECDSA (1<<2)
57: #define KT_ED25519 (1<<3)
1.1.1.14 christos 58: #define KT_XMSS (1<<4)
1.1.1.18 christos 59: #define KT_ECDSA_SK (1<<5)
60: #define KT_ED25519_SK (1<<6)
1.1.1.13 christos 61:
62: #define KT_MIN KT_DSA
1.1.1.18 christos 63: #define KT_MAX KT_ED25519_SK
1.1 christos 64:
1.1.1.10 christos 65: int get_cert = 0;
1.1.1.18 christos 66: int get_keytypes = KT_RSA|KT_ECDSA|KT_ED25519|KT_ECDSA_SK|KT_ED25519_SK;
1.1 christos 67:
68: int hash_hosts = 0; /* Hash hostname on output */
69:
1.1.1.14 christos 70: int print_sshfp = 0; /* Print SSHFP records instead of known_hosts */
71:
1.1.1.16 christos 72: int found_one = 0; /* Successfully found a key */
73:
1.1 christos 74: #define MAXMAXFD 256
75:
76: /* The number of seconds after which to give up on a TCP connection */
77: int timeout = 5;
78:
79: int maxfd;
80: #define MAXCON (maxfd - 10)
81:
82: extern char *__progname;
1.1.1.21! christos 83: struct pollfd *read_wait;
1.1 christos 84: int ncon;
85:
86: /*
87: * Keep a connection structure for each file descriptor. The state
88: * associated with file descriptor n is held in fdcon[n].
89: */
90: typedef struct Connection {
91: u_char c_status; /* State of connection on this file desc. */
92: #define CS_UNUSED 0 /* File descriptor unused */
93: #define CS_CON 1 /* Waiting to connect/read greeting */
94: #define CS_SIZE 2 /* Waiting to read initial packet size */
95: #define CS_KEYS 3 /* Waiting to read public key packet */
96: int c_fd; /* Quick lookup: c->c_fd == c - fdcon */
97: int c_plen; /* Packet length field for ssh packet */
98: int c_len; /* Total bytes which must be read. */
99: int c_off; /* Length of data read so far. */
1.1.1.13 christos 100: int c_keytype; /* Only one of KT_* */
1.1.1.9 christos 101: sig_atomic_t c_done; /* SSH2 done */
1.1 christos 102: char *c_namebase; /* Address to free for c_name and c_namelist */
103: char *c_name; /* Hostname of connection for errors */
104: char *c_namelist; /* Pointer to other possible addresses */
105: char *c_output_name; /* Hostname of connection for output */
106: char *c_data; /* Data read from this fd */
1.1.1.8 christos 107: struct ssh *c_ssh; /* SSH-connection */
1.1.1.21! christos 108: struct timespec c_ts; /* Time at which connection gets aborted */
1.1 christos 109: TAILQ_ENTRY(Connection) c_link; /* List of connections in timeout order. */
110: } con;
111:
112: TAILQ_HEAD(conlist, Connection) tq; /* Timeout Queue */
113: con *fdcon;
114:
1.1.1.8 christos 115: static void keyprint(con *c, struct sshkey *key);
116:
1.1 christos 117: static int
118: fdlim_get(int hard)
119: {
120: struct rlimit rlfd;
121:
1.1.1.17 christos 122: if (getrlimit(RLIMIT_NOFILE, &rlfd) == -1)
1.1 christos 123: return (-1);
124: if ((hard ? rlfd.rlim_max : rlfd.rlim_cur) == RLIM_INFINITY)
125: return sysconf(_SC_OPEN_MAX);
126: else
127: return hard ? rlfd.rlim_max : rlfd.rlim_cur;
128: }
129:
130: static int
131: fdlim_set(int lim)
132: {
133: struct rlimit rlfd;
134:
135: if (lim <= 0)
136: return (-1);
1.1.1.17 christos 137: if (getrlimit(RLIMIT_NOFILE, &rlfd) == -1)
1.1 christos 138: return (-1);
139: rlfd.rlim_cur = lim;
1.1.1.17 christos 140: if (setrlimit(RLIMIT_NOFILE, &rlfd) == -1)
1.1 christos 141: return (-1);
142: return (0);
143: }
144:
145: /*
146: * This is an strsep function that returns a null field for adjacent
147: * separators. This is the same as the 4.4BSD strsep, but different from the
148: * one in the GNU libc.
149: */
150: static char *
151: xstrsep(char **str, const char *delim)
152: {
153: char *s, *e;
154:
155: if (!**str)
156: return (NULL);
157:
158: s = *str;
159: e = s + strcspn(s, delim);
160:
161: if (*e != '\0')
162: *e++ = '\0';
163: *str = e;
164:
165: return (s);
166: }
167:
168: /*
169: * Get the next non-null token (like GNU strsep). Strsep() will return a
170: * null token for two adjacent separators, so we may have to loop.
171: */
172: static char *
173: strnnsep(char **stringp, char *delim)
174: {
175: char *tok;
176:
177: do {
178: tok = xstrsep(stringp, delim);
179: } while (tok && *tok == '\0');
180: return (tok);
181: }
182:
183:
184: static int
1.1.1.8 christos 185: key_print_wrapper(struct sshkey *hostkey, struct ssh *ssh)
1.1 christos 186: {
1.1.1.8 christos 187: con *c;
188:
189: if ((c = ssh_get_app_data(ssh)) != NULL)
190: keyprint(c, hostkey);
191: /* always abort key exchange */
192: return -1;
1.1 christos 193: }
194:
195: static int
196: ssh2_capable(int remote_major, int remote_minor)
197: {
198: switch (remote_major) {
199: case 1:
200: if (remote_minor == 99)
201: return 1;
202: break;
203: case 2:
204: return 1;
205: default:
206: break;
207: }
208: return 0;
209: }
210:
1.1.1.8 christos 211: static void
1.1 christos 212: keygrab_ssh2(con *c)
213: {
1.1.1.7 christos 214: char *myproposal[PROPOSAL_MAX] = { KEX_CLIENT };
1.1.1.8 christos 215: int r;
1.1 christos 216:
1.1.1.10 christos 217: switch (c->c_keytype) {
218: case KT_DSA:
219: myproposal[PROPOSAL_SERVER_HOST_KEY_ALGS] = get_cert ?
220: "ssh-dss-cert-v01@openssh.com" : "ssh-dss";
221: break;
222: case KT_RSA:
223: myproposal[PROPOSAL_SERVER_HOST_KEY_ALGS] = get_cert ?
1.1.1.17 christos 224: "rsa-sha2-512-cert-v01@openssh.com,"
225: "rsa-sha2-256-cert-v01@openssh.com,"
226: "ssh-rsa-cert-v01@openssh.com" :
227: "rsa-sha2-512,"
228: "rsa-sha2-256,"
229: "ssh-rsa";
1.1.1.10 christos 230: break;
231: case KT_ED25519:
232: myproposal[PROPOSAL_SERVER_HOST_KEY_ALGS] = get_cert ?
233: "ssh-ed25519-cert-v01@openssh.com" : "ssh-ed25519";
234: break;
1.1.1.14 christos 235: case KT_XMSS:
236: myproposal[PROPOSAL_SERVER_HOST_KEY_ALGS] = get_cert ?
237: "ssh-xmss-cert-v01@openssh.com" : "ssh-xmss@openssh.com";
238: break;
1.1.1.10 christos 239: case KT_ECDSA:
240: myproposal[PROPOSAL_SERVER_HOST_KEY_ALGS] = get_cert ?
241: "ecdsa-sha2-nistp256-cert-v01@openssh.com,"
242: "ecdsa-sha2-nistp384-cert-v01@openssh.com,"
243: "ecdsa-sha2-nistp521-cert-v01@openssh.com" :
244: "ecdsa-sha2-nistp256,"
245: "ecdsa-sha2-nistp384,"
246: "ecdsa-sha2-nistp521";
247: break;
1.1.1.18 christos 248: case KT_ECDSA_SK:
249: myproposal[PROPOSAL_SERVER_HOST_KEY_ALGS] = get_cert ?
250: "sk-ecdsa-sha2-nistp256-cert-v01@openssh.com" :
251: "sk-ecdsa-sha2-nistp256@openssh.com";
252: break;
253: case KT_ED25519_SK:
254: myproposal[PROPOSAL_SERVER_HOST_KEY_ALGS] = get_cert ?
255: "sk-ssh-ed25519-cert-v01@openssh.com" :
256: "sk-ssh-ed25519@openssh.com";
257: break;
1.1.1.10 christos 258: default:
259: fatal("unknown key type %d", c->c_keytype);
260: break;
261: }
1.1.1.8 christos 262: if ((r = kex_setup(c->c_ssh, myproposal)) != 0) {
263: free(c->c_ssh);
264: fprintf(stderr, "kex_setup: %s\n", ssh_err(r));
1.1 christos 265: exit(1);
266: }
1.1.1.8 christos 267: #ifdef WITH_OPENSSL
1.1.1.16 christos 268: c->c_ssh->kex->kex[KEX_DH_GRP1_SHA1] = kex_gen_client;
269: c->c_ssh->kex->kex[KEX_DH_GRP14_SHA1] = kex_gen_client;
270: c->c_ssh->kex->kex[KEX_DH_GRP14_SHA256] = kex_gen_client;
271: c->c_ssh->kex->kex[KEX_DH_GRP16_SHA512] = kex_gen_client;
272: c->c_ssh->kex->kex[KEX_DH_GRP18_SHA512] = kex_gen_client;
1.1.1.8 christos 273: c->c_ssh->kex->kex[KEX_DH_GEX_SHA1] = kexgex_client;
274: c->c_ssh->kex->kex[KEX_DH_GEX_SHA256] = kexgex_client;
1.1.1.16 christos 275: c->c_ssh->kex->kex[KEX_ECDH_SHA2] = kex_gen_client;
1.1.1.8 christos 276: #endif
1.1.1.16 christos 277: c->c_ssh->kex->kex[KEX_C25519_SHA256] = kex_gen_client;
1.1.1.20 christos 278: c->c_ssh->kex->kex[KEX_KEM_SNTRUP761X25519_SHA512] = kex_gen_client;
1.1.1.8 christos 279: ssh_set_verify_host_key_callback(c->c_ssh, key_print_wrapper);
280: /*
281: * do the key-exchange until an error occurs or until
282: * the key_print_wrapper() callback sets c_done.
283: */
1.1.1.13 christos 284: ssh_dispatch_run(c->c_ssh, DISPATCH_BLOCK, &c->c_done);
1.1 christos 285: }
286:
287: static void
1.1.1.12 christos 288: keyprint_one(const char *host, struct sshkey *key)
1.1 christos 289: {
1.1.1.21! christos 290: char *hostport = NULL, *hashed = NULL;
! 291: const char *known_host;
1.1 christos 292:
1.1.1.16 christos 293: found_one = 1;
294:
1.1.1.14 christos 295: if (print_sshfp) {
296: export_dns_rr(host, key, stdout, 0);
297: return;
298: }
299:
1.1.1.9 christos 300: hostport = put_host_port(host, ssh_port);
1.1.1.12 christos 301: lowercase(hostport);
1.1.1.21! christos 302: if (hash_hosts && (hashed = host_hash(hostport, NULL, 0)) == NULL)
1.1.1.12 christos 303: fatal("host_hash failed");
304: known_host = hash_hosts ? hashed : hostport;
1.1.1.10 christos 305: if (!get_cert)
1.1.1.12 christos 306: fprintf(stdout, "%s ", known_host);
1.1.1.8 christos 307: sshkey_write(key, stdout);
1.1 christos 308: fputs("\n", stdout);
1.1.1.21! christos 309: free(hashed);
1.1.1.9 christos 310: free(hostport);
1.1 christos 311: }
312:
1.1.1.10 christos 313: static void
314: keyprint(con *c, struct sshkey *key)
315: {
316: char *hosts = c->c_output_name ? c->c_output_name : c->c_name;
317: char *host, *ohosts;
318:
319: if (key == NULL)
320: return;
321: if (get_cert || (!hash_hosts && ssh_port == SSH_DEFAULT_PORT)) {
322: keyprint_one(hosts, key);
323: return;
324: }
325: ohosts = hosts = xstrdup(hosts);
326: while ((host = strsep(&hosts, ",")) != NULL)
327: keyprint_one(host, key);
328: free(ohosts);
329: }
330:
1.1 christos 331: static int
332: tcpconnect(char *host)
333: {
334: struct addrinfo hints, *ai, *aitop;
335: char strport[NI_MAXSERV];
336: int gaierr, s = -1;
337:
338: snprintf(strport, sizeof strport, "%d", ssh_port);
339: memset(&hints, 0, sizeof(hints));
340: hints.ai_family = IPv4or6;
341: hints.ai_socktype = SOCK_STREAM;
1.1.1.8 christos 342: if ((gaierr = getaddrinfo(host, strport, &hints, &aitop)) != 0) {
343: error("getaddrinfo %s: %s", host, ssh_gai_strerror(gaierr));
344: return -1;
345: }
1.1 christos 346: for (ai = aitop; ai; ai = ai->ai_next) {
347: s = socket(ai->ai_family, ai->ai_socktype, ai->ai_protocol);
1.1.1.17 christos 348: if (s == -1) {
1.1 christos 349: error("socket: %s", strerror(errno));
350: continue;
351: }
352: if (set_nonblock(s) == -1)
1.1.1.20 christos 353: fatal_f("set_nonblock(%d)", s);
1.1.1.17 christos 354: if (connect(s, ai->ai_addr, ai->ai_addrlen) == -1 &&
1.1 christos 355: errno != EINPROGRESS)
356: error("connect (`%s'): %s", host, strerror(errno));
357: else
358: break;
359: close(s);
360: s = -1;
361: }
362: freeaddrinfo(aitop);
363: return s;
364: }
365:
366: static int
367: conalloc(char *iname, char *oname, int keytype)
368: {
369: char *namebase, *name, *namelist;
370: int s;
371:
372: namebase = namelist = xstrdup(iname);
373:
374: do {
375: name = xstrsep(&namelist, ",");
376: if (!name) {
1.1.1.6 christos 377: free(namebase);
1.1 christos 378: return (-1);
379: }
380: } while ((s = tcpconnect(name)) < 0);
381:
382: if (s >= maxfd)
383: fatal("conalloc: fdno %d too high", s);
384: if (fdcon[s].c_status)
385: fatal("conalloc: attempt to reuse fdno %d", s);
386:
1.1.1.20 christos 387: debug3_f("oname %s kt %d", oname, keytype);
1.1 christos 388: fdcon[s].c_fd = s;
389: fdcon[s].c_status = CS_CON;
390: fdcon[s].c_namebase = namebase;
391: fdcon[s].c_name = name;
392: fdcon[s].c_namelist = namelist;
393: fdcon[s].c_output_name = xstrdup(oname);
394: fdcon[s].c_data = (char *) &fdcon[s].c_plen;
395: fdcon[s].c_len = 4;
396: fdcon[s].c_off = 0;
397: fdcon[s].c_keytype = keytype;
1.1.1.21! christos 398: monotime_ts(&fdcon[s].c_ts);
! 399: fdcon[s].c_ts.tv_sec += timeout;
1.1 christos 400: TAILQ_INSERT_TAIL(&tq, &fdcon[s], c_link);
1.1.1.21! christos 401: read_wait[s].fd = s;
! 402: read_wait[s].events = POLLIN;
1.1 christos 403: ncon++;
404: return (s);
405: }
406:
407: static void
408: confree(int s)
409: {
410: if (s >= maxfd || fdcon[s].c_status == CS_UNUSED)
411: fatal("confree: attempt to free bad fdno %d", s);
1.1.1.6 christos 412: free(fdcon[s].c_namebase);
413: free(fdcon[s].c_output_name);
1.1 christos 414: if (fdcon[s].c_status == CS_KEYS)
1.1.1.6 christos 415: free(fdcon[s].c_data);
1.1 christos 416: fdcon[s].c_status = CS_UNUSED;
417: fdcon[s].c_keytype = 0;
1.1.1.8 christos 418: if (fdcon[s].c_ssh) {
419: ssh_packet_close(fdcon[s].c_ssh);
420: free(fdcon[s].c_ssh);
421: fdcon[s].c_ssh = NULL;
1.1.1.13 christos 422: } else
423: close(s);
1.1 christos 424: TAILQ_REMOVE(&tq, &fdcon[s], c_link);
1.1.1.21! christos 425: read_wait[s].fd = -1;
! 426: read_wait[s].events = 0;
1.1 christos 427: ncon--;
428: }
429:
430: static void
431: contouch(int s)
432: {
433: TAILQ_REMOVE(&tq, &fdcon[s], c_link);
1.1.1.21! christos 434: monotime_ts(&fdcon[s].c_ts);
! 435: fdcon[s].c_ts.tv_sec += timeout;
1.1 christos 436: TAILQ_INSERT_TAIL(&tq, &fdcon[s], c_link);
437: }
438:
439: static int
440: conrecycle(int s)
441: {
442: con *c = &fdcon[s];
443: int ret;
444:
445: ret = conalloc(c->c_namelist, c->c_output_name, c->c_keytype);
446: confree(s);
447: return (ret);
448: }
449:
450: static void
451: congreet(int s)
452: {
453: int n = 0, remote_major = 0, remote_minor = 0;
454: char buf[256], *cp;
455: char remote_version[sizeof buf];
456: size_t bufsiz;
457: con *c = &fdcon[s];
458:
1.1.1.13 christos 459: /* send client banner */
460: n = snprintf(buf, sizeof buf, "SSH-%d.%d-OpenSSH-keyscan\r\n",
461: PROTOCOL_MAJOR_2, PROTOCOL_MINOR_2);
462: if (n < 0 || (size_t)n >= sizeof(buf)) {
463: error("snprintf: buffer too small");
464: confree(s);
465: return;
466: }
467: if (atomicio(vwrite, s, buf, n) != (size_t)n) {
468: error("write (%s): %s", c->c_name, strerror(errno));
469: confree(s);
470: return;
471: }
472:
1.1 christos 473: for (;;) {
474: memset(buf, '\0', sizeof(buf));
475: bufsiz = sizeof(buf);
476: cp = buf;
477: while (bufsiz-- &&
478: (n = atomicio(read, s, cp, 1)) == 1 && *cp != '\n') {
479: if (*cp == '\r')
480: *cp = '\n';
481: cp++;
482: }
483: if (n != 1 || strncmp(buf, "SSH-", 4) == 0)
484: break;
485: }
486: if (n == 0) {
487: switch (errno) {
488: case EPIPE:
489: error("%s: Connection closed by remote host", c->c_name);
490: break;
491: case ECONNREFUSED:
492: break;
493: default:
494: error("read (%s): %s", c->c_name, strerror(errno));
495: break;
496: }
497: conrecycle(s);
498: return;
499: }
500: if (*cp != '\n' && *cp != '\r') {
501: error("%s: bad greeting", c->c_name);
502: confree(s);
503: return;
504: }
505: *cp = '\0';
1.1.1.8 christos 506: if ((c->c_ssh = ssh_packet_set_connection(NULL, s, s)) == NULL)
507: fatal("ssh_packet_set_connection failed");
508: ssh_packet_set_timeout(c->c_ssh, timeout, 1);
509: ssh_set_app_data(c->c_ssh, c); /* back link */
1.1.1.20 christos 510: c->c_ssh->compat = 0;
1.1 christos 511: if (sscanf(buf, "SSH-%d.%d-%[^\n]\n",
512: &remote_major, &remote_minor, remote_version) == 3)
1.1.1.20 christos 513: compat_banner(c->c_ssh, remote_version);
1.1.1.13 christos 514: if (!ssh2_capable(remote_major, remote_minor)) {
515: debug("%s doesn't support ssh2", c->c_name);
1.1 christos 516: confree(s);
517: return;
518: }
1.1.1.14 christos 519: fprintf(stderr, "%c %s:%d %s\n", print_sshfp ? ';' : '#',
520: c->c_name, ssh_port, chop(buf));
1.1.1.13 christos 521: keygrab_ssh2(c);
522: confree(s);
1.1 christos 523: }
524:
525: static void
526: conread(int s)
527: {
528: con *c = &fdcon[s];
529: size_t n;
530:
531: if (c->c_status == CS_CON) {
532: congreet(s);
533: return;
534: }
535: n = atomicio(read, s, c->c_data + c->c_off, c->c_len - c->c_off);
536: if (n == 0) {
537: error("read (%s): %s", c->c_name, strerror(errno));
538: confree(s);
539: return;
540: }
541: c->c_off += n;
542:
543: if (c->c_off == c->c_len)
544: switch (c->c_status) {
545: case CS_SIZE:
546: c->c_plen = htonl(c->c_plen);
547: c->c_len = c->c_plen + 8 - (c->c_plen & 7);
548: c->c_off = 0;
549: c->c_data = xmalloc(c->c_len);
550: c->c_status = CS_KEYS;
551: break;
552: default:
553: fatal("conread: invalid status %d", c->c_status);
554: break;
555: }
556:
557: contouch(s);
558: }
559:
560: static void
561: conloop(void)
562: {
1.1.1.21! christos 563: struct timespec seltime, now;
1.1 christos 564: con *c;
565: int i;
566:
1.1.1.21! christos 567: monotime_ts(&now);
1.1 christos 568: c = TAILQ_FIRST(&tq);
569:
1.1.1.21! christos 570: if (c && timespeccmp(&c->c_ts, &now, >))
! 571: timespecsub(&c->c_ts, &now, &seltime);
1.1.1.19 christos 572: else
1.1.1.21! christos 573: timespecclear(&seltime);
1.1 christos 574:
1.1.1.21! christos 575: while (ppoll(read_wait, maxfd, &seltime, NULL) == -1) {
! 576: if (errno == EAGAIN || errno == EINTR)
! 577: continue;
! 578: error("poll error");
! 579: }
1.1 christos 580:
581: for (i = 0; i < maxfd; i++) {
1.1.1.21! christos 582: if (read_wait[i].revents & (POLLHUP|POLLERR|POLLNVAL))
1.1 christos 583: confree(i);
1.1.1.21! christos 584: else if (read_wait[i].revents & (POLLIN|POLLHUP))
1.1 christos 585: conread(i);
586: }
587:
588: c = TAILQ_FIRST(&tq);
1.1.1.21! christos 589: while (c && timespeccmp(&c->c_ts, &now, <)) {
1.1 christos 590: int s = c->c_fd;
591:
592: c = TAILQ_NEXT(c, c_link);
593: conrecycle(s);
594: }
595: }
596:
597: static void
598: do_host(char *host)
599: {
600: char *name = strnnsep(&host, " \t\n");
601: int j;
602:
603: if (name == NULL)
604: return;
1.1.1.13 christos 605: for (j = KT_MIN; j <= KT_MAX; j *= 2) {
1.1 christos 606: if (get_keytypes & j) {
607: while (ncon >= MAXCON)
608: conloop();
609: conalloc(name, *host ? host : name, j);
610: }
611: }
612: }
613:
614: void
1.1.1.20 christos 615: sshfatal(const char *file, const char *func, int line, int showfunc,
616: LogLevel level, const char *suffix, const char *fmt, ...)
1.1 christos 617: {
618: va_list args;
619:
620: va_start(args, fmt);
1.1.1.20 christos 621: sshlogv(file, func, line, showfunc, level, suffix, fmt, args);
1.1 christos 622: va_end(args);
1.1.1.20 christos 623: cleanup_exit(255);
1.1 christos 624: }
625:
626: static void
627: usage(void)
628: {
629: fprintf(stderr,
1.1.1.14 christos 630: "usage: %s [-46cDHv] [-f file] [-p port] [-T timeout] [-t type]\n"
631: "\t\t [host | addrlist namelist]\n",
1.1 christos 632: __progname);
633: exit(1);
634: }
635:
636: int
637: main(int argc, char **argv)
638: {
639: int debug_flag = 0, log_level = SYSLOG_LEVEL_INFO;
1.1.1.2 adam 640: int opt, fopt_count = 0, j;
1.1.1.15 christos 641: char *tname, *cp, *line = NULL;
642: size_t linesize = 0;
1.1.1.2 adam 643: FILE *fp;
1.1 christos 644:
645: extern int optind;
646: extern char *optarg;
647:
648: TAILQ_INIT(&tq);
649:
650: /* Ensure that fds 0, 1 and 2 are open or directed to /dev/null */
651: sanitise_stdfd();
652:
653: if (argc <= 1)
654: usage();
655:
1.1.1.14 christos 656: while ((opt = getopt(argc, argv, "cDHv46p:T:t:f:")) != -1) {
1.1 christos 657: switch (opt) {
658: case 'H':
659: hash_hosts = 1;
660: break;
1.1.1.10 christos 661: case 'c':
662: get_cert = 1;
663: break;
1.1.1.14 christos 664: case 'D':
665: print_sshfp = 1;
666: break;
1.1 christos 667: case 'p':
668: ssh_port = a2port(optarg);
669: if (ssh_port <= 0) {
670: fprintf(stderr, "Bad port '%s'\n", optarg);
671: exit(1);
672: }
673: break;
674: case 'T':
675: timeout = convtime(optarg);
676: if (timeout == -1 || timeout == 0) {
677: fprintf(stderr, "Bad timeout '%s'\n", optarg);
678: usage();
679: }
680: break;
681: case 'v':
682: if (!debug_flag) {
683: debug_flag = 1;
684: log_level = SYSLOG_LEVEL_DEBUG1;
685: }
686: else if (log_level < SYSLOG_LEVEL_DEBUG3)
687: log_level++;
688: else
689: fatal("Too high debugging level.");
690: break;
691: case 'f':
692: if (strcmp(optarg, "-") == 0)
693: optarg = NULL;
694: argv[fopt_count++] = optarg;
695: break;
696: case 't':
697: get_keytypes = 0;
698: tname = strtok(optarg, ",");
699: while (tname) {
1.1.1.8 christos 700: int type = sshkey_type_from_name(tname);
1.1.1.12 christos 701:
1.1 christos 702: switch (type) {
703: case KEY_DSA:
704: get_keytypes |= KT_DSA;
705: break;
1.1.1.3 christos 706: case KEY_ECDSA:
707: get_keytypes |= KT_ECDSA;
708: break;
1.1 christos 709: case KEY_RSA:
710: get_keytypes |= KT_RSA;
711: break;
1.1.1.7 christos 712: case KEY_ED25519:
713: get_keytypes |= KT_ED25519;
714: break;
1.1.1.14 christos 715: case KEY_XMSS:
716: get_keytypes |= KT_XMSS;
717: break;
1.1.1.18 christos 718: case KEY_ED25519_SK:
719: get_keytypes |= KT_ED25519_SK;
720: break;
721: case KEY_ECDSA_SK:
722: get_keytypes |= KT_ECDSA_SK;
723: break;
1.1 christos 724: case KEY_UNSPEC:
1.1.1.12 christos 725: default:
726: fatal("Unknown key type \"%s\"", tname);
1.1 christos 727: }
728: tname = strtok(NULL, ",");
729: }
730: break;
731: case '4':
732: IPv4or6 = AF_INET;
733: break;
734: case '6':
735: IPv4or6 = AF_INET6;
736: break;
737: case '?':
738: default:
739: usage();
740: }
741: }
742: if (optind == argc && !fopt_count)
743: usage();
744:
745: log_init("ssh-keyscan", log_level, SYSLOG_FACILITY_USER, 1);
746:
747: maxfd = fdlim_get(1);
748: if (maxfd < 0)
749: fatal("%s: fdlim_get: bad value", __progname);
750: if (maxfd > MAXMAXFD)
751: maxfd = MAXMAXFD;
752: if (MAXCON <= 0)
753: fatal("%s: not enough file descriptors", __progname);
754: if (maxfd > fdlim_get(0))
755: fdlim_set(maxfd);
756: fdcon = xcalloc(maxfd, sizeof(con));
1.1.1.21! christos 757: read_wait = xcalloc(maxfd, sizeof(struct pollfd));
! 758: for (j = 0; j < maxfd; j++)
! 759: read_wait[j].fd = -1;
1.1 christos 760:
1.1.1.2 adam 761: for (j = 0; j < fopt_count; j++) {
762: if (argv[j] == NULL)
763: fp = stdin;
764: else if ((fp = fopen(argv[j], "r")) == NULL)
1.1.1.20 christos 765: fatal("%s: %s: %s", __progname, argv[j], strerror(errno));
1.1.1.2 adam 766:
1.1.1.15 christos 767: while (getline(&line, &linesize, fp) != -1) {
1.1.1.2 adam 768: /* Chomp off trailing whitespace and comments */
769: if ((cp = strchr(line, '#')) == NULL)
770: cp = line + strlen(line) - 1;
771: while (cp >= line) {
772: if (*cp == ' ' || *cp == '\t' ||
773: *cp == '\n' || *cp == '#')
774: *cp-- = '\0';
775: else
776: break;
777: }
778:
779: /* Skip empty lines */
780: if (*line == '\0')
1.1 christos 781: continue;
1.1.1.2 adam 782:
783: do_host(line);
1.1 christos 784: }
1.1.1.2 adam 785:
786: if (ferror(fp))
1.1.1.20 christos 787: fatal("%s: %s: %s", __progname, argv[j], strerror(errno));
1.1.1.2 adam 788:
789: fclose(fp);
1.1 christos 790: }
1.1.1.15 christos 791: free(line);
1.1 christos 792:
793: while (optind < argc)
794: do_host(argv[optind++]);
795:
796: while (ncon > 0)
797: conloop();
798:
1.1.1.16 christos 799: return found_one ? 0 : 1;
1.1 christos 800: }
CVSweb <webmaster@jp.NetBSD.org>