Annotation of src/usr.bin/ssh/ssh-add.c, Revision 1.144
1.144 ! markus 1: /* $OpenBSD: ssh-add.c,v 1.143 2019/10/31 21:19:56 djm Exp $ */
1.1 deraadt 2: /*
1.13 deraadt 3: * Author: Tatu Ylonen <ylo@cs.hut.fi>
4: * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
5: * All rights reserved
6: * Adds an identity to the authentication server, or removes an identity.
1.19 markus 7: *
1.22 deraadt 8: * As far as I am concerned, the code I have written for this software
9: * can be used freely for any purpose. Any derived versions of this
10: * software must be clearly marked as such, and if the derived work is
11: * incompatible with the protocol description in the RFC file, it must be
12: * called by a name other than "ssh" or "Secure Shell".
13: *
1.19 markus 14: * SSH2 implementation,
1.41 markus 15: * Copyright (c) 2000, 2001 Markus Friedl. All rights reserved.
1.22 deraadt 16: *
17: * Redistribution and use in source and binary forms, with or without
18: * modification, are permitted provided that the following conditions
19: * are met:
20: * 1. Redistributions of source code must retain the above copyright
21: * notice, this list of conditions and the following disclaimer.
22: * 2. Redistributions in binary form must reproduce the above copyright
23: * notice, this list of conditions and the following disclaimer in the
24: * documentation and/or other materials provided with the distribution.
25: *
26: * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
27: * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
28: * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
29: * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
30: * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
31: * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
32: * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
33: * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
34: * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
35: * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
1.13 deraadt 36: */
1.1 deraadt 37:
1.75 stevesk 38: #include <sys/types.h>
39: #include <sys/stat.h>
1.16 markus 40:
1.141 djm 41: #ifdef WITH_OPENSSL
1.19 markus 42: #include <openssl/evp.h>
1.141 djm 43: #endif
1.81 stevesk 44:
1.116 djm 45: #include <errno.h>
1.82 stevesk 46: #include <fcntl.h>
1.81 stevesk 47: #include <pwd.h>
1.88 stevesk 48: #include <stdio.h>
1.87 stevesk 49: #include <stdlib.h>
1.85 stevesk 50: #include <string.h>
1.84 stevesk 51: #include <unistd.h>
1.117 deraadt 52: #include <limits.h>
1.1 deraadt 53:
1.89 deraadt 54: #include "xmalloc.h"
1.27 markus 55: #include "ssh.h"
56: #include "log.h"
1.116 djm 57: #include "sshkey.h"
58: #include "sshbuf.h"
1.18 markus 59: #include "authfd.h"
1.16 markus 60: #include "authfile.h"
1.25 markus 61: #include "pathnames.h"
1.57 stevesk 62: #include "misc.h"
1.110 djm 63: #include "ssherr.h"
1.115 djm 64: #include "digest.h"
1.1 deraadt 65:
1.45 jakob 66: /* argv0 */
67: extern char *__progname;
68:
1.48 djm 69: /* Default files to add */
70: static char *default_files[] = {
71: _PATH_SSH_CLIENT_ID_RSA,
72: _PATH_SSH_CLIENT_ID_DSA,
1.99 djm 73: _PATH_SSH_CLIENT_ID_ECDSA,
1.143 djm 74: _PATH_SSH_CLIENT_ID_ECDSA_SK,
1.107 pascal 75: _PATH_SSH_CLIENT_ID_ED25519,
1.144 ! markus 76: _PATH_SSH_CLIENT_ID_ED25519_SK,
1.135 markus 77: _PATH_SSH_CLIENT_ID_XMSS,
1.48 djm 78: NULL
79: };
80:
1.115 djm 81: static int fingerprint_hash = SSH_FP_HASH_DEFAULT;
82:
1.56 markus 83: /* Default lifetime (0 == forever) */
1.57 stevesk 84: static int lifetime = 0;
1.48 djm 85:
1.65 markus 86: /* User has to confirm key use */
87: static int confirm = 0;
88:
1.135 markus 89: /* Maximum number of signatures (XMSS) */
90: static u_int maxsign = 0;
91: static u_int minleft = 0;
92:
1.124 tim 93: /* we keep a cache of one passphrase */
1.33 markus 94: static char *pass = NULL;
1.39 itojun 95: static void
1.33 markus 96: clear_pass(void)
97: {
98: if (pass) {
1.109 djm 99: explicit_bzero(pass, strlen(pass));
1.106 djm 100: free(pass);
1.33 markus 101: pass = NULL;
102: }
103: }
104:
1.46 djm 105: static int
1.134 dlg 106: delete_file(int agent_fd, const char *filename, int key_only, int qflag)
1.1 deraadt 107: {
1.116 djm 108: struct sshkey *public, *cert = NULL;
1.104 djm 109: char *certpath = NULL, *comment = NULL;
1.116 djm 110: int r, ret = -1;
1.1 deraadt 111:
1.116 djm 112: if ((r = sshkey_load_public(filename, &public, &comment)) != 0) {
113: printf("Bad key file %s: %s\n", filename, ssh_err(r));
1.46 djm 114: return -1;
1.12 markus 115: }
1.116 djm 116: if ((r = ssh_remove_identity(agent_fd, public)) == 0) {
1.134 dlg 117: if (!qflag) {
118: fprintf(stderr, "Identity removed: %s (%s)\n",
119: filename, comment);
120: }
1.46 djm 121: ret = 0;
122: } else
1.116 djm 123: fprintf(stderr, "Could not remove identity \"%s\": %s\n",
124: filename, ssh_err(r));
1.46 djm 125:
1.104 djm 126: if (key_only)
127: goto out;
128:
129: /* Now try to delete the corresponding certificate too */
130: free(comment);
1.105 markus 131: comment = NULL;
1.104 djm 132: xasprintf(&certpath, "%s-cert.pub", filename);
1.120 halex 133: if ((r = sshkey_load_public(certpath, &cert, &comment)) != 0) {
134: if (r != SSH_ERR_SYSTEM_ERROR || errno != ENOENT)
135: error("Failed to load certificate \"%s\": %s",
136: certpath, ssh_err(r));
1.104 djm 137: goto out;
1.120 halex 138: }
139:
1.116 djm 140: if (!sshkey_equal_public(cert, public))
1.104 djm 141: fatal("Certificate %s does not match private key %s",
142: certpath, filename);
143:
1.120 halex 144: if ((r = ssh_remove_identity(agent_fd, cert)) == 0) {
1.134 dlg 145: if (!qflag) {
146: fprintf(stderr, "Identity removed: %s (%s)\n",
147: certpath, comment);
148: }
1.104 djm 149: ret = 0;
150: } else
1.120 halex 151: fprintf(stderr, "Could not remove identity \"%s\": %s\n",
152: certpath, ssh_err(r));
1.104 djm 153:
154: out:
1.127 mmcc 155: sshkey_free(cert);
156: sshkey_free(public);
1.104 djm 157: free(certpath);
158: free(comment);
1.47 deraadt 159:
1.46 djm 160: return ret;
1.1 deraadt 161: }
162:
1.19 markus 163: /* Send a request to remove all identities. */
1.46 djm 164: static int
1.136 djm 165: delete_all(int agent_fd, int qflag)
1.1 deraadt 166: {
1.46 djm 167: int ret = -1;
1.19 markus 168:
1.130 djm 169: /*
170: * Since the agent might be forwarded, old or non-OpenSSH, when asked
171: * to remove all keys, attempt to remove both protocol v.1 and v.2
172: * keys.
173: */
1.121 markus 174: if (ssh_remove_all_identities(agent_fd, 2) == 0)
1.46 djm 175: ret = 0;
1.121 markus 176: /* ignore error-code for ssh1 */
177: ssh_remove_all_identities(agent_fd, 1);
1.19 markus 178:
1.136 djm 179: if (ret != 0)
180: fprintf(stderr, "Failed to remove all identities.\n");
181: else if (!qflag)
1.12 markus 182: fprintf(stderr, "All identities removed.\n");
1.46 djm 183:
184: return ret;
1.1 deraadt 185: }
186:
1.46 djm 187: static int
1.143 djm 188: add_file(int agent_fd, const char *filename, int key_only, int qflag,
189: const char *skprovider)
1.1 deraadt 190: {
1.116 djm 191: struct sshkey *private, *cert;
1.36 markus 192: char *comment = NULL;
1.102 djm 193: char msg[1024], *certpath = NULL;
1.116 djm 194: int r, fd, ret = -1;
1.135 markus 195: size_t i;
196: u_int32_t left;
1.116 djm 197: struct sshbuf *keyblob;
1.135 markus 198: struct ssh_identitylist *idlist;
1.12 markus 199:
1.101 djm 200: if (strcmp(filename, "-") == 0) {
201: fd = STDIN_FILENO;
202: filename = "(stdin)";
1.140 deraadt 203: } else if ((fd = open(filename, O_RDONLY)) == -1) {
1.19 markus 204: perror(filename);
1.46 djm 205: return -1;
1.19 markus 206: }
1.76 dtucker 207:
208: /*
209: * Since we'll try to load a keyfile multiple times, permission errors
210: * will occur multiple times, so check perms first and bail if wrong.
211: */
1.101 djm 212: if (fd != STDIN_FILENO) {
1.116 djm 213: if (sshkey_perm_ok(fd, filename) != 0) {
1.101 djm 214: close(fd);
215: return -1;
216: }
217: }
1.116 djm 218: if ((keyblob = sshbuf_new()) == NULL)
219: fatal("%s: sshbuf_new failed", __func__);
220: if ((r = sshkey_load_file(fd, keyblob)) != 0) {
221: fprintf(stderr, "Error loading key \"%s\": %s\n",
222: filename, ssh_err(r));
223: sshbuf_free(keyblob);
1.101 djm 224: close(fd);
225: return -1;
226: }
1.76 dtucker 227: close(fd);
228:
1.12 markus 229: /* At first, try empty passphrase */
1.125 tim 230: if ((r = sshkey_parse_private_fileblob(keyblob, "", &private,
231: &comment)) != 0 && r != SSH_ERR_KEY_WRONG_PASSPHRASE) {
1.116 djm 232: fprintf(stderr, "Error loading key \"%s\": %s\n",
233: filename, ssh_err(r));
234: goto fail_load;
235: }
1.33 markus 236: /* try last */
1.110 djm 237: if (private == NULL && pass != NULL) {
1.125 tim 238: if ((r = sshkey_parse_private_fileblob(keyblob, pass, &private,
239: &comment)) != 0 && r != SSH_ERR_KEY_WRONG_PASSPHRASE) {
1.116 djm 240: fprintf(stderr, "Error loading key \"%s\": %s\n",
241: filename, ssh_err(r));
242: goto fail_load;
243: }
1.110 djm 244: }
1.31 markus 245: if (private == NULL) {
1.33 markus 246: /* clear passphrase since it did not work */
247: clear_pass();
1.124 tim 248: snprintf(msg, sizeof msg, "Enter passphrase for %s%s: ",
249: filename, confirm ? " (will confirm each use)" : "");
1.12 markus 250: for (;;) {
1.40 markus 251: pass = read_passphrase(msg, RP_ALLOW_STDIN);
1.116 djm 252: if (strcmp(pass, "") == 0)
253: goto fail_load;
254: if ((r = sshkey_parse_private_fileblob(keyblob, pass,
1.125 tim 255: &private, &comment)) == 0)
1.116 djm 256: break;
257: else if (r != SSH_ERR_KEY_WRONG_PASSPHRASE) {
258: fprintf(stderr,
259: "Error loading key \"%s\": %s\n",
260: filename, ssh_err(r));
261: fail_load:
1.35 markus 262: clear_pass();
1.116 djm 263: sshbuf_free(keyblob);
1.46 djm 264: return -1;
1.12 markus 265: }
1.33 markus 266: clear_pass();
1.68 markus 267: snprintf(msg, sizeof msg,
1.124 tim 268: "Bad passphrase, try again for %s%s: ", filename,
1.119 halex 269: confirm ? " (will confirm each use)" : "");
1.12 markus 270: }
271: }
1.124 tim 272: if (comment == NULL || *comment == '\0')
273: comment = xstrdup(filename);
1.116 djm 274: sshbuf_free(keyblob);
1.60 markus 275:
1.135 markus 276: /* For XMSS */
277: if ((r = sshkey_set_filename(private, filename)) != 0) {
278: fprintf(stderr, "Could not add filename to private key: %s (%s)\n",
279: filename, comment);
280: goto out;
281: }
282: if (maxsign && minleft &&
283: (r = ssh_fetch_identitylist(agent_fd, &idlist)) == 0) {
284: for (i = 0; i < idlist->nkeys; i++) {
285: if (!sshkey_equal_public(idlist->keys[i], private))
286: continue;
287: left = sshkey_signatures_left(idlist->keys[i]);
288: if (left < minleft) {
289: fprintf(stderr,
290: "Only %d signatures left.\n", left);
291: break;
292: }
293: fprintf(stderr, "Skipping update: ");
294: if (left == minleft) {
295: fprintf(stderr,
296: "required signatures left (%d).\n", left);
297: } else {
298: fprintf(stderr,
299: "more signatures left (%d) than"
300: " required (%d).\n", left, minleft);
301: }
302: ssh_free_identitylist(idlist);
303: goto out;
304: }
305: ssh_free_identitylist(idlist);
306: }
307:
1.144 ! markus 308: if (!sshkey_is_sk(private))
1.143 djm 309: skprovider = NULL; /* Don't send constraint for other keys */
310: else if (skprovider == NULL) {
311: fprintf(stderr, "Cannot load security key %s without "
312: "provider\n", filename);
313: goto out;
314: }
315:
1.116 djm 316: if ((r = ssh_add_identity_constrained(agent_fd, private, comment,
1.143 djm 317: lifetime, confirm, maxsign, skprovider)) == 0) {
1.60 markus 318: ret = 0;
1.136 djm 319: if (!qflag) {
320: fprintf(stderr, "Identity added: %s (%s)\n",
321: filename, comment);
322: if (lifetime != 0) {
323: fprintf(stderr,
324: "Lifetime set to %d seconds\n", lifetime);
325: }
326: if (confirm != 0) {
327: fprintf(stderr, "The user must confirm "
328: "each use of the key\n");
329: }
330: }
1.60 markus 331: } else {
1.116 djm 332: fprintf(stderr, "Could not add identity \"%s\": %s\n",
333: filename, ssh_err(r));
1.56 markus 334: }
335:
1.102 djm 336: /* Skip trying to load the cert if requested */
337: if (key_only)
338: goto out;
1.93 djm 339:
340: /* Now try to add the certificate flavour too */
341: xasprintf(&certpath, "%s-cert.pub", filename);
1.116 djm 342: if ((r = sshkey_load_public(certpath, &cert, NULL)) != 0) {
343: if (r != SSH_ERR_SYSTEM_ERROR || errno != ENOENT)
344: error("Failed to load certificate \"%s\": %s",
345: certpath, ssh_err(r));
1.96 djm 346: goto out;
1.116 djm 347: }
1.96 djm 348:
1.116 djm 349: if (!sshkey_equal_public(cert, private)) {
1.96 djm 350: error("Certificate %s does not match private key %s",
351: certpath, filename);
1.116 djm 352: sshkey_free(cert);
1.96 djm 353: goto out;
354: }
1.93 djm 355:
1.96 djm 356: /* Graft with private bits */
1.123 djm 357: if ((r = sshkey_to_certified(private)) != 0) {
1.116 djm 358: error("%s: sshkey_to_certified: %s", __func__, ssh_err(r));
359: sshkey_free(cert);
360: goto out;
361: }
362: if ((r = sshkey_cert_copy(cert, private)) != 0) {
1.132 markus 363: error("%s: sshkey_cert_copy: %s", __func__, ssh_err(r));
1.116 djm 364: sshkey_free(cert);
1.96 djm 365: goto out;
1.94 otto 366: }
1.116 djm 367: sshkey_free(cert);
1.93 djm 368:
1.116 djm 369: if ((r = ssh_add_identity_constrained(agent_fd, private, comment,
1.143 djm 370: lifetime, confirm, maxsign, skprovider)) != 0) {
1.116 djm 371: error("Certificate %s (%s) add failed: %s", certpath,
372: private->cert->key_id, ssh_err(r));
373: goto out;
1.96 djm 374: }
1.136 djm 375: /* success */
376: if (!qflag) {
377: fprintf(stderr, "Certificate added: %s (%s)\n", certpath,
378: private->cert->key_id);
379: if (lifetime != 0) {
380: fprintf(stderr, "Lifetime set to %d seconds\n",
381: lifetime);
382: }
383: if (confirm != 0) {
384: fprintf(stderr, "The user must confirm each use "
385: "of the key\n");
386: }
387: }
388:
1.96 djm 389: out:
1.116 djm 390: free(certpath);
1.106 djm 391: free(comment);
1.116 djm 392: sshkey_free(private);
1.47 deraadt 393:
1.46 djm 394: return ret;
1.1 deraadt 395: }
396:
1.46 djm 397: static int
1.136 djm 398: update_card(int agent_fd, int add, const char *id, int qflag)
1.42 markus 399: {
1.108 djm 400: char *pin = NULL;
1.116 djm 401: int r, ret = -1;
1.53 rees 402:
1.108 djm 403: if (add) {
404: if ((pin = read_passphrase("Enter passphrase for PKCS#11: ",
405: RP_ALLOW_STDIN)) == NULL)
406: return -1;
407: }
1.53 rees 408:
1.116 djm 409: if ((r = ssh_update_card(agent_fd, add, id, pin == NULL ? "" : pin,
410: lifetime, confirm)) == 0) {
1.66 markus 411: ret = 0;
1.136 djm 412: if (!qflag) {
413: fprintf(stderr, "Card %s: %s\n",
414: add ? "added" : "removed", id);
415: }
1.46 djm 416: } else {
1.116 djm 417: fprintf(stderr, "Could not %s card \"%s\": %s\n",
418: add ? "add" : "remove", id, ssh_err(r));
1.66 markus 419: ret = -1;
1.46 djm 420: }
1.106 djm 421: free(pin);
1.66 markus 422: return ret;
1.42 markus 423: }
424:
1.50 markus 425: static int
1.137 djm 426: test_key(int agent_fd, const char *filename)
427: {
428: struct sshkey *key = NULL;
429: u_char *sig = NULL;
430: size_t slen = 0;
431: int r, ret = -1;
432: char data[1024];
433:
434: if ((r = sshkey_load_public(filename, &key, NULL)) != 0) {
435: error("Couldn't read public key %s: %s", filename, ssh_err(r));
436: return -1;
437: }
438: arc4random_buf(data, sizeof(data));
439: if ((r = ssh_agent_sign(agent_fd, key, &sig, &slen, data, sizeof(data),
440: NULL, 0)) != 0) {
441: error("Agent signature failed for %s: %s",
442: filename, ssh_err(r));
443: goto done;
444: }
445: if ((r = sshkey_verify(key, sig, slen, data, sizeof(data),
446: NULL, 0)) != 0) {
447: error("Signature verification failed for %s: %s",
448: filename, ssh_err(r));
449: goto done;
450: }
451: /* success */
452: ret = 0;
453: done:
454: free(sig);
455: sshkey_free(key);
456: return ret;
457: }
458:
459: static int
1.116 djm 460: list_identities(int agent_fd, int do_fp)
1.1 deraadt 461: {
1.116 djm 462: char *fp;
1.131 naddy 463: int r;
1.116 djm 464: struct ssh_identitylist *idlist;
1.135 markus 465: u_int32_t left;
1.116 djm 466: size_t i;
1.12 markus 467:
1.131 naddy 468: if ((r = ssh_fetch_identitylist(agent_fd, &idlist)) != 0) {
469: if (r != SSH_ERR_AGENT_NO_IDENTITIES)
470: fprintf(stderr, "error fetching identities: %s\n",
471: ssh_err(r));
472: else
473: printf("The agent has no identities.\n");
474: return -1;
475: }
476: for (i = 0; i < idlist->nkeys; i++) {
477: if (do_fp) {
478: fp = sshkey_fingerprint(idlist->keys[i],
479: fingerprint_hash, SSH_FP_DEFAULT);
480: printf("%u %s %s (%s)\n", sshkey_size(idlist->keys[i]),
481: fp == NULL ? "(null)" : fp, idlist->comments[i],
482: sshkey_type(idlist->keys[i]));
483: free(fp);
484: } else {
485: if ((r = sshkey_write(idlist->keys[i], stdout)) != 0) {
486: fprintf(stderr, "sshkey_write: %s\n",
487: ssh_err(r));
488: continue;
1.12 markus 489: }
1.135 markus 490: fprintf(stdout, " %s", idlist->comments[i]);
491: left = sshkey_signatures_left(idlist->keys[i]);
492: if (left > 0)
493: fprintf(stdout,
494: " [signatures left %d]", left);
495: fprintf(stdout, "\n");
1.12 markus 496: }
1.50 markus 497: }
1.131 naddy 498: ssh_free_identitylist(idlist);
1.50 markus 499: return 0;
1.1 deraadt 500: }
501:
1.48 djm 502: static int
1.116 djm 503: lock_agent(int agent_fd, int lock)
1.54 markus 504: {
505: char prompt[100], *p1, *p2;
1.116 djm 506: int r, passok = 1, ret = -1;
1.61 deraadt 507:
1.54 markus 508: strlcpy(prompt, "Enter lock password: ", sizeof(prompt));
509: p1 = read_passphrase(prompt, RP_ALLOW_STDIN);
510: if (lock) {
511: strlcpy(prompt, "Again: ", sizeof prompt);
512: p2 = read_passphrase(prompt, RP_ALLOW_STDIN);
513: if (strcmp(p1, p2) != 0) {
514: fprintf(stderr, "Passwords do not match.\n");
515: passok = 0;
516: }
1.109 djm 517: explicit_bzero(p2, strlen(p2));
1.106 djm 518: free(p2);
1.54 markus 519: }
1.116 djm 520: if (passok) {
521: if ((r = ssh_lock_agent(agent_fd, lock, p1)) == 0) {
522: fprintf(stderr, "Agent %slocked.\n", lock ? "" : "un");
523: ret = 0;
524: } else {
525: fprintf(stderr, "Failed to %slock agent: %s\n",
526: lock ? "" : "un", ssh_err(r));
527: }
528: }
1.109 djm 529: explicit_bzero(p1, strlen(p1));
1.106 djm 530: free(p1);
1.62 markus 531: return (ret);
1.54 markus 532: }
533:
534: static int
1.143 djm 535: do_file(int agent_fd, int deleting, int key_only, char *file, int qflag,
536: const char *skprovider)
1.48 djm 537: {
538: if (deleting) {
1.134 dlg 539: if (delete_file(agent_fd, file, key_only, qflag) == -1)
1.48 djm 540: return -1;
541: } else {
1.143 djm 542: if (add_file(agent_fd, file, key_only, qflag, skprovider) == -1)
1.48 djm 543: return -1;
544: }
545: return 0;
546: }
547:
1.42 markus 548: static void
549: usage(void)
550: {
1.90 sobrado 551: fprintf(stderr, "usage: %s [options] [file ...]\n", __progname);
1.45 jakob 552: fprintf(stderr, "Options:\n");
553: fprintf(stderr, " -l List fingerprints of all identities.\n");
1.115 djm 554: fprintf(stderr, " -E hash Specify hash algorithm used for fingerprints.\n");
1.45 jakob 555: fprintf(stderr, " -L List public key parameters of all identities.\n");
1.103 djm 556: fprintf(stderr, " -k Load only keys and not certificates.\n");
557: fprintf(stderr, " -c Require confirmation to sign using identities\n");
1.135 markus 558: fprintf(stderr, " -m minleft Maxsign is only changed if less than minleft are left (for XMSS)\n");
559: fprintf(stderr, " -M maxsign Maximum number of signatures allowed (for XMSS)\n");
1.103 djm 560: fprintf(stderr, " -t life Set lifetime (in seconds) when adding identities.\n");
1.45 jakob 561: fprintf(stderr, " -d Delete identity.\n");
562: fprintf(stderr, " -D Delete all identities.\n");
1.55 markus 563: fprintf(stderr, " -x Lock agent.\n");
1.63 markus 564: fprintf(stderr, " -X Unlock agent.\n");
1.92 markus 565: fprintf(stderr, " -s pkcs11 Add keys from PKCS#11 provider.\n");
566: fprintf(stderr, " -e pkcs11 Remove keys provided by PKCS#11 provider.\n");
1.137 djm 567: fprintf(stderr, " -T pubkey Test if ssh-agent can access matching private key.\n");
1.143 djm 568: fprintf(stderr, " -S provider Specify security key provider.\n");
1.134 dlg 569: fprintf(stderr, " -q Be quiet after a successful operation.\n");
1.138 djm 570: fprintf(stderr, " -v Be more verbose.\n");
1.42 markus 571: }
572:
1.2 provos 573: int
1.7 markus 574: main(int argc, char **argv)
1.1 deraadt 575: {
1.43 markus 576: extern char *optarg;
577: extern int optind;
1.116 djm 578: int agent_fd;
1.143 djm 579: char *pkcs11provider = NULL, *skprovider = NULL;
1.116 djm 580: int r, i, ch, deleting = 0, ret = 0, key_only = 0;
1.137 djm 581: int xflag = 0, lflag = 0, Dflag = 0, qflag = 0, Tflag = 0;
1.138 djm 582: SyslogFacility log_facility = SYSLOG_FACILITY_AUTH;
583: LogLevel log_level = SYSLOG_LEVEL_INFO;
1.73 djm 584:
585: /* Ensure that fds 0, 1 and 2 are open or directed to /dev/null */
586: sanitise_stdfd();
1.12 markus 587:
1.141 djm 588: #ifdef WITH_OPENSSL
1.100 djm 589: OpenSSL_add_all_algorithms();
1.141 djm 590: #endif
1.138 djm 591: log_init(__progname, log_level, log_facility, 1);
592:
1.114 millert 593: setvbuf(stdout, NULL, _IOLBF, 0);
1.19 markus 594:
1.116 djm 595: /* First, get a connection to the authentication agent. */
596: switch (r = ssh_get_authentication_socket(&agent_fd)) {
597: case 0:
598: break;
599: case SSH_ERR_AGENT_NOT_PRESENT:
600: fprintf(stderr, "Could not open a connection to your "
601: "authentication agent.\n");
602: exit(2);
603: default:
604: fprintf(stderr, "Error connecting to agent: %s\n", ssh_err(r));
1.50 markus 605: exit(2);
1.12 markus 606: }
1.116 djm 607:
1.143 djm 608: skprovider = getenv("SSH_SK_PROVIDER");
609:
610: while ((ch = getopt(argc, argv, "vklLcdDTxXE:e:M:m:qs:S:t:")) != -1) {
1.43 markus 611: switch (ch) {
1.138 djm 612: case 'v':
613: if (log_level == SYSLOG_LEVEL_INFO)
614: log_level = SYSLOG_LEVEL_DEBUG1;
615: else if (log_level < SYSLOG_LEVEL_DEBUG3)
616: log_level++;
617: break;
1.115 djm 618: case 'E':
619: fingerprint_hash = ssh_digest_alg_by_name(optarg);
620: if (fingerprint_hash == -1)
621: fatal("Invalid hash algorithm \"%s\"", optarg);
622: break;
1.102 djm 623: case 'k':
624: key_only = 1;
625: break;
1.43 markus 626: case 'l':
627: case 'L':
1.115 djm 628: if (lflag != 0)
629: fatal("-%c flag already specified", lflag);
630: lflag = ch;
631: break;
1.54 markus 632: case 'x':
633: case 'X':
1.115 djm 634: if (xflag != 0)
635: fatal("-%c flag already specified", xflag);
636: xflag = ch;
637: break;
1.65 markus 638: case 'c':
639: confirm = 1;
1.135 markus 640: break;
641: case 'm':
642: minleft = (int)strtonum(optarg, 1, UINT_MAX, NULL);
643: if (minleft == 0) {
644: usage();
645: ret = 1;
646: goto done;
647: }
648: break;
649: case 'M':
650: maxsign = (int)strtonum(optarg, 1, UINT_MAX, NULL);
651: if (maxsign == 0) {
652: usage();
653: ret = 1;
654: goto done;
655: }
1.43 markus 656: break;
657: case 'd':
1.12 markus 658: deleting = 1;
1.43 markus 659: break;
660: case 'D':
1.115 djm 661: Dflag = 1;
662: break;
1.43 markus 663: case 's':
1.92 markus 664: pkcs11provider = optarg;
1.43 markus 665: break;
1.143 djm 666: case 'S':
667: skprovider = optarg;
668: break;
1.43 markus 669: case 'e':
1.47 deraadt 670: deleting = 1;
1.92 markus 671: pkcs11provider = optarg;
1.56 markus 672: break;
673: case 't':
1.57 stevesk 674: if ((lifetime = convtime(optarg)) == -1) {
675: fprintf(stderr, "Invalid lifetime\n");
676: ret = 1;
677: goto done;
678: }
1.43 markus 679: break;
1.134 dlg 680: case 'q':
681: qflag = 1;
682: break;
1.137 djm 683: case 'T':
684: Tflag = 1;
685: break;
1.43 markus 686: default:
687: usage();
1.46 djm 688: ret = 1;
689: goto done;
1.42 markus 690: }
691: }
1.138 djm 692: log_init(__progname, log_level, log_facility, 1);
1.115 djm 693:
694: if ((xflag != 0) + (lflag != 0) + (Dflag != 0) > 1)
695: fatal("Invalid combination of actions");
696: else if (xflag) {
1.116 djm 697: if (lock_agent(agent_fd, xflag == 'x' ? 1 : 0) == -1)
1.115 djm 698: ret = 1;
699: goto done;
700: } else if (lflag) {
1.116 djm 701: if (list_identities(agent_fd, lflag == 'l' ? 1 : 0) == -1)
1.115 djm 702: ret = 1;
703: goto done;
704: } else if (Dflag) {
1.136 djm 705: if (delete_all(agent_fd, qflag) == -1)
1.115 djm 706: ret = 1;
707: goto done;
708: }
709:
1.43 markus 710: argc -= optind;
711: argv += optind;
1.137 djm 712: if (Tflag) {
713: if (argc <= 0)
714: fatal("no keys to test");
715: for (r = i = 0; i < argc; i++)
716: r |= test_key(agent_fd, argv[i]);
717: ret = r == 0 ? 0 : 1;
718: goto done;
719: }
1.92 markus 720: if (pkcs11provider != NULL) {
1.136 djm 721: if (update_card(agent_fd, !deleting, pkcs11provider,
722: qflag) == -1)
1.46 djm 723: ret = 1;
1.43 markus 724: goto done;
1.12 markus 725: }
1.43 markus 726: if (argc == 0) {
1.117 deraadt 727: char buf[PATH_MAX];
1.48 djm 728: struct passwd *pw;
1.52 markus 729: struct stat st;
730: int count = 0;
1.48 djm 731:
732: if ((pw = getpwuid(getuid())) == NULL) {
1.20 deraadt 733: fprintf(stderr, "No user found with uid %u\n",
734: (u_int)getuid());
1.46 djm 735: ret = 1;
736: goto done;
1.12 markus 737: }
1.48 djm 738:
1.71 deraadt 739: for (i = 0; default_files[i]; i++) {
1.51 markus 740: snprintf(buf, sizeof(buf), "%s/%s", pw->pw_dir,
1.48 djm 741: default_files[i]);
1.140 deraadt 742: if (stat(buf, &st) == -1)
1.52 markus 743: continue;
1.134 dlg 744: if (do_file(agent_fd, deleting, key_only, buf,
1.143 djm 745: qflag, skprovider) == -1)
1.46 djm 746: ret = 1;
1.52 markus 747: else
748: count++;
1.46 djm 749: }
1.52 markus 750: if (count == 0)
751: ret = 1;
1.43 markus 752: } else {
1.71 deraadt 753: for (i = 0; i < argc; i++) {
1.116 djm 754: if (do_file(agent_fd, deleting, key_only,
1.143 djm 755: argv[i], qflag, skprovider) == -1)
1.48 djm 756: ret = 1;
1.43 markus 757: }
1.12 markus 758: }
1.33 markus 759: clear_pass();
1.43 markus 760:
761: done:
1.116 djm 762: ssh_close_authentication_socket(agent_fd);
1.46 djm 763: return ret;
1.1 deraadt 764: }
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