Annotation of src/usr.bin/ssh/ssh-add.c, Revision 1.147
1.147 ! djm 1: /* $OpenBSD: ssh-add.c,v 1.146 2019/11/18 16:10:05 naddy 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>
1.146 naddy 51: #include <stdarg.h>
1.84 stevesk 52: #include <unistd.h>
1.117 deraadt 53: #include <limits.h>
1.1 deraadt 54:
1.89 deraadt 55: #include "xmalloc.h"
1.27 markus 56: #include "ssh.h"
57: #include "log.h"
1.116 djm 58: #include "sshkey.h"
59: #include "sshbuf.h"
1.18 markus 60: #include "authfd.h"
1.16 markus 61: #include "authfile.h"
1.25 markus 62: #include "pathnames.h"
1.57 stevesk 63: #include "misc.h"
1.110 djm 64: #include "ssherr.h"
1.115 djm 65: #include "digest.h"
1.1 deraadt 66:
1.45 jakob 67: /* argv0 */
68: extern char *__progname;
69:
1.48 djm 70: /* Default files to add */
71: static char *default_files[] = {
72: _PATH_SSH_CLIENT_ID_RSA,
73: _PATH_SSH_CLIENT_ID_DSA,
1.99 djm 74: _PATH_SSH_CLIENT_ID_ECDSA,
1.143 djm 75: _PATH_SSH_CLIENT_ID_ECDSA_SK,
1.107 pascal 76: _PATH_SSH_CLIENT_ID_ED25519,
1.144 markus 77: _PATH_SSH_CLIENT_ID_ED25519_SK,
1.135 markus 78: _PATH_SSH_CLIENT_ID_XMSS,
1.48 djm 79: NULL
80: };
81:
1.115 djm 82: static int fingerprint_hash = SSH_FP_HASH_DEFAULT;
83:
1.56 markus 84: /* Default lifetime (0 == forever) */
1.57 stevesk 85: static int lifetime = 0;
1.48 djm 86:
1.65 markus 87: /* User has to confirm key use */
88: static int confirm = 0;
89:
1.135 markus 90: /* Maximum number of signatures (XMSS) */
91: static u_int maxsign = 0;
92: static u_int minleft = 0;
93:
1.124 tim 94: /* we keep a cache of one passphrase */
1.33 markus 95: static char *pass = NULL;
1.39 itojun 96: static void
1.33 markus 97: clear_pass(void)
98: {
99: if (pass) {
1.109 djm 100: explicit_bzero(pass, strlen(pass));
1.106 djm 101: free(pass);
1.33 markus 102: pass = NULL;
103: }
104: }
105:
1.46 djm 106: static int
1.134 dlg 107: delete_file(int agent_fd, const char *filename, int key_only, int qflag)
1.1 deraadt 108: {
1.116 djm 109: struct sshkey *public, *cert = NULL;
1.104 djm 110: char *certpath = NULL, *comment = NULL;
1.116 djm 111: int r, ret = -1;
1.1 deraadt 112:
1.116 djm 113: if ((r = sshkey_load_public(filename, &public, &comment)) != 0) {
114: printf("Bad key file %s: %s\n", filename, ssh_err(r));
1.46 djm 115: return -1;
1.12 markus 116: }
1.116 djm 117: if ((r = ssh_remove_identity(agent_fd, public)) == 0) {
1.134 dlg 118: if (!qflag) {
119: fprintf(stderr, "Identity removed: %s (%s)\n",
120: filename, comment);
121: }
1.46 djm 122: ret = 0;
123: } else
1.116 djm 124: fprintf(stderr, "Could not remove identity \"%s\": %s\n",
125: filename, ssh_err(r));
1.46 djm 126:
1.104 djm 127: if (key_only)
128: goto out;
129:
130: /* Now try to delete the corresponding certificate too */
131: free(comment);
1.105 markus 132: comment = NULL;
1.104 djm 133: xasprintf(&certpath, "%s-cert.pub", filename);
1.120 halex 134: if ((r = sshkey_load_public(certpath, &cert, &comment)) != 0) {
135: if (r != SSH_ERR_SYSTEM_ERROR || errno != ENOENT)
136: error("Failed to load certificate \"%s\": %s",
137: certpath, ssh_err(r));
1.104 djm 138: goto out;
1.120 halex 139: }
140:
1.116 djm 141: if (!sshkey_equal_public(cert, public))
1.104 djm 142: fatal("Certificate %s does not match private key %s",
143: certpath, filename);
144:
1.120 halex 145: if ((r = ssh_remove_identity(agent_fd, cert)) == 0) {
1.134 dlg 146: if (!qflag) {
147: fprintf(stderr, "Identity removed: %s (%s)\n",
148: certpath, comment);
149: }
1.104 djm 150: ret = 0;
151: } else
1.120 halex 152: fprintf(stderr, "Could not remove identity \"%s\": %s\n",
153: certpath, ssh_err(r));
1.104 djm 154:
155: out:
1.127 mmcc 156: sshkey_free(cert);
157: sshkey_free(public);
1.104 djm 158: free(certpath);
159: free(comment);
1.47 deraadt 160:
1.46 djm 161: return ret;
1.1 deraadt 162: }
163:
1.19 markus 164: /* Send a request to remove all identities. */
1.46 djm 165: static int
1.136 djm 166: delete_all(int agent_fd, int qflag)
1.1 deraadt 167: {
1.46 djm 168: int ret = -1;
1.19 markus 169:
1.130 djm 170: /*
171: * Since the agent might be forwarded, old or non-OpenSSH, when asked
172: * to remove all keys, attempt to remove both protocol v.1 and v.2
173: * keys.
174: */
1.121 markus 175: if (ssh_remove_all_identities(agent_fd, 2) == 0)
1.46 djm 176: ret = 0;
1.121 markus 177: /* ignore error-code for ssh1 */
178: ssh_remove_all_identities(agent_fd, 1);
1.19 markus 179:
1.136 djm 180: if (ret != 0)
181: fprintf(stderr, "Failed to remove all identities.\n");
182: else if (!qflag)
1.12 markus 183: fprintf(stderr, "All identities removed.\n");
1.46 djm 184:
185: return ret;
1.1 deraadt 186: }
187:
1.46 djm 188: static int
1.143 djm 189: add_file(int agent_fd, const char *filename, int key_only, int qflag,
190: const char *skprovider)
1.1 deraadt 191: {
1.116 djm 192: struct sshkey *private, *cert;
1.36 markus 193: char *comment = NULL;
1.102 djm 194: char msg[1024], *certpath = NULL;
1.116 djm 195: int r, fd, ret = -1;
1.135 markus 196: size_t i;
197: u_int32_t left;
1.116 djm 198: struct sshbuf *keyblob;
1.135 markus 199: struct ssh_identitylist *idlist;
1.12 markus 200:
1.101 djm 201: if (strcmp(filename, "-") == 0) {
202: fd = STDIN_FILENO;
203: filename = "(stdin)";
1.140 deraadt 204: } else if ((fd = open(filename, O_RDONLY)) == -1) {
1.19 markus 205: perror(filename);
1.46 djm 206: return -1;
1.19 markus 207: }
1.76 dtucker 208:
209: /*
210: * Since we'll try to load a keyfile multiple times, permission errors
211: * will occur multiple times, so check perms first and bail if wrong.
212: */
1.101 djm 213: if (fd != STDIN_FILENO) {
1.116 djm 214: if (sshkey_perm_ok(fd, filename) != 0) {
1.101 djm 215: close(fd);
216: return -1;
217: }
218: }
1.116 djm 219: if ((keyblob = sshbuf_new()) == NULL)
220: fatal("%s: sshbuf_new failed", __func__);
221: if ((r = sshkey_load_file(fd, keyblob)) != 0) {
222: fprintf(stderr, "Error loading key \"%s\": %s\n",
223: filename, ssh_err(r));
224: sshbuf_free(keyblob);
1.101 djm 225: close(fd);
226: return -1;
227: }
1.76 dtucker 228: close(fd);
229:
1.12 markus 230: /* At first, try empty passphrase */
1.125 tim 231: if ((r = sshkey_parse_private_fileblob(keyblob, "", &private,
232: &comment)) != 0 && r != SSH_ERR_KEY_WRONG_PASSPHRASE) {
1.116 djm 233: fprintf(stderr, "Error loading key \"%s\": %s\n",
234: filename, ssh_err(r));
235: goto fail_load;
236: }
1.33 markus 237: /* try last */
1.110 djm 238: if (private == NULL && pass != NULL) {
1.125 tim 239: if ((r = sshkey_parse_private_fileblob(keyblob, pass, &private,
240: &comment)) != 0 && r != SSH_ERR_KEY_WRONG_PASSPHRASE) {
1.116 djm 241: fprintf(stderr, "Error loading key \"%s\": %s\n",
242: filename, ssh_err(r));
243: goto fail_load;
244: }
1.110 djm 245: }
1.31 markus 246: if (private == NULL) {
1.33 markus 247: /* clear passphrase since it did not work */
248: clear_pass();
1.124 tim 249: snprintf(msg, sizeof msg, "Enter passphrase for %s%s: ",
250: filename, confirm ? " (will confirm each use)" : "");
1.12 markus 251: for (;;) {
1.40 markus 252: pass = read_passphrase(msg, RP_ALLOW_STDIN);
1.116 djm 253: if (strcmp(pass, "") == 0)
254: goto fail_load;
255: if ((r = sshkey_parse_private_fileblob(keyblob, pass,
1.125 tim 256: &private, &comment)) == 0)
1.116 djm 257: break;
258: else if (r != SSH_ERR_KEY_WRONG_PASSPHRASE) {
259: fprintf(stderr,
260: "Error loading key \"%s\": %s\n",
261: filename, ssh_err(r));
262: fail_load:
1.35 markus 263: clear_pass();
1.116 djm 264: sshbuf_free(keyblob);
1.46 djm 265: return -1;
1.12 markus 266: }
1.33 markus 267: clear_pass();
1.68 markus 268: snprintf(msg, sizeof msg,
1.124 tim 269: "Bad passphrase, try again for %s%s: ", filename,
1.119 halex 270: confirm ? " (will confirm each use)" : "");
1.12 markus 271: }
272: }
1.124 tim 273: if (comment == NULL || *comment == '\0')
274: comment = xstrdup(filename);
1.116 djm 275: sshbuf_free(keyblob);
1.60 markus 276:
1.135 markus 277: /* For XMSS */
278: if ((r = sshkey_set_filename(private, filename)) != 0) {
279: fprintf(stderr, "Could not add filename to private key: %s (%s)\n",
280: filename, comment);
281: goto out;
282: }
283: if (maxsign && minleft &&
284: (r = ssh_fetch_identitylist(agent_fd, &idlist)) == 0) {
285: for (i = 0; i < idlist->nkeys; i++) {
286: if (!sshkey_equal_public(idlist->keys[i], private))
287: continue;
288: left = sshkey_signatures_left(idlist->keys[i]);
289: if (left < minleft) {
290: fprintf(stderr,
291: "Only %d signatures left.\n", left);
292: break;
293: }
294: fprintf(stderr, "Skipping update: ");
295: if (left == minleft) {
296: fprintf(stderr,
297: "required signatures left (%d).\n", left);
298: } else {
299: fprintf(stderr,
300: "more signatures left (%d) than"
301: " required (%d).\n", left, minleft);
302: }
303: ssh_free_identitylist(idlist);
304: goto out;
305: }
306: ssh_free_identitylist(idlist);
307: }
308:
1.144 markus 309: if (!sshkey_is_sk(private))
1.143 djm 310: skprovider = NULL; /* Don't send constraint for other keys */
311: else if (skprovider == NULL) {
312: fprintf(stderr, "Cannot load security key %s without "
313: "provider\n", filename);
314: goto out;
315: }
316:
1.116 djm 317: if ((r = ssh_add_identity_constrained(agent_fd, private, comment,
1.143 djm 318: lifetime, confirm, maxsign, skprovider)) == 0) {
1.60 markus 319: ret = 0;
1.136 djm 320: if (!qflag) {
321: fprintf(stderr, "Identity added: %s (%s)\n",
322: filename, comment);
323: if (lifetime != 0) {
324: fprintf(stderr,
325: "Lifetime set to %d seconds\n", lifetime);
326: }
327: if (confirm != 0) {
328: fprintf(stderr, "The user must confirm "
329: "each use of the key\n");
330: }
331: }
1.60 markus 332: } else {
1.116 djm 333: fprintf(stderr, "Could not add identity \"%s\": %s\n",
334: filename, ssh_err(r));
1.56 markus 335: }
336:
1.102 djm 337: /* Skip trying to load the cert if requested */
338: if (key_only)
339: goto out;
1.93 djm 340:
341: /* Now try to add the certificate flavour too */
342: xasprintf(&certpath, "%s-cert.pub", filename);
1.116 djm 343: if ((r = sshkey_load_public(certpath, &cert, NULL)) != 0) {
344: if (r != SSH_ERR_SYSTEM_ERROR || errno != ENOENT)
345: error("Failed to load certificate \"%s\": %s",
346: certpath, ssh_err(r));
1.96 djm 347: goto out;
1.116 djm 348: }
1.96 djm 349:
1.116 djm 350: if (!sshkey_equal_public(cert, private)) {
1.96 djm 351: error("Certificate %s does not match private key %s",
352: certpath, filename);
1.116 djm 353: sshkey_free(cert);
1.96 djm 354: goto out;
355: }
1.93 djm 356:
1.96 djm 357: /* Graft with private bits */
1.123 djm 358: if ((r = sshkey_to_certified(private)) != 0) {
1.116 djm 359: error("%s: sshkey_to_certified: %s", __func__, ssh_err(r));
360: sshkey_free(cert);
361: goto out;
362: }
363: if ((r = sshkey_cert_copy(cert, private)) != 0) {
1.132 markus 364: error("%s: sshkey_cert_copy: %s", __func__, ssh_err(r));
1.116 djm 365: sshkey_free(cert);
1.96 djm 366: goto out;
1.94 otto 367: }
1.116 djm 368: sshkey_free(cert);
1.93 djm 369:
1.116 djm 370: if ((r = ssh_add_identity_constrained(agent_fd, private, comment,
1.143 djm 371: lifetime, confirm, maxsign, skprovider)) != 0) {
1.116 djm 372: error("Certificate %s (%s) add failed: %s", certpath,
373: private->cert->key_id, ssh_err(r));
374: goto out;
1.96 djm 375: }
1.136 djm 376: /* success */
377: if (!qflag) {
378: fprintf(stderr, "Certificate added: %s (%s)\n", certpath,
379: private->cert->key_id);
380: if (lifetime != 0) {
381: fprintf(stderr, "Lifetime set to %d seconds\n",
382: lifetime);
383: }
384: if (confirm != 0) {
385: fprintf(stderr, "The user must confirm each use "
386: "of the key\n");
387: }
388: }
389:
1.96 djm 390: out:
1.116 djm 391: free(certpath);
1.106 djm 392: free(comment);
1.116 djm 393: sshkey_free(private);
1.47 deraadt 394:
1.46 djm 395: return ret;
1.1 deraadt 396: }
397:
1.46 djm 398: static int
1.136 djm 399: update_card(int agent_fd, int add, const char *id, int qflag)
1.42 markus 400: {
1.108 djm 401: char *pin = NULL;
1.116 djm 402: int r, ret = -1;
1.53 rees 403:
1.108 djm 404: if (add) {
405: if ((pin = read_passphrase("Enter passphrase for PKCS#11: ",
406: RP_ALLOW_STDIN)) == NULL)
407: return -1;
408: }
1.53 rees 409:
1.116 djm 410: if ((r = ssh_update_card(agent_fd, add, id, pin == NULL ? "" : pin,
411: lifetime, confirm)) == 0) {
1.66 markus 412: ret = 0;
1.136 djm 413: if (!qflag) {
414: fprintf(stderr, "Card %s: %s\n",
415: add ? "added" : "removed", id);
416: }
1.46 djm 417: } else {
1.116 djm 418: fprintf(stderr, "Could not %s card \"%s\": %s\n",
419: add ? "add" : "remove", id, ssh_err(r));
1.66 markus 420: ret = -1;
1.46 djm 421: }
1.106 djm 422: free(pin);
1.66 markus 423: return ret;
1.42 markus 424: }
425:
1.50 markus 426: static int
1.137 djm 427: test_key(int agent_fd, const char *filename)
428: {
429: struct sshkey *key = NULL;
430: u_char *sig = NULL;
431: size_t slen = 0;
432: int r, ret = -1;
433: char data[1024];
434:
435: if ((r = sshkey_load_public(filename, &key, NULL)) != 0) {
436: error("Couldn't read public key %s: %s", filename, ssh_err(r));
437: return -1;
438: }
439: arc4random_buf(data, sizeof(data));
440: if ((r = ssh_agent_sign(agent_fd, key, &sig, &slen, data, sizeof(data),
441: NULL, 0)) != 0) {
442: error("Agent signature failed for %s: %s",
443: filename, ssh_err(r));
444: goto done;
445: }
446: if ((r = sshkey_verify(key, sig, slen, data, sizeof(data),
1.147 ! djm 447: NULL, 0, NULL)) != 0) {
1.137 djm 448: error("Signature verification failed for %s: %s",
449: filename, ssh_err(r));
450: goto done;
451: }
452: /* success */
453: ret = 0;
454: done:
455: free(sig);
456: sshkey_free(key);
457: return ret;
458: }
459:
460: static int
1.116 djm 461: list_identities(int agent_fd, int do_fp)
1.1 deraadt 462: {
1.116 djm 463: char *fp;
1.131 naddy 464: int r;
1.116 djm 465: struct ssh_identitylist *idlist;
1.135 markus 466: u_int32_t left;
1.116 djm 467: size_t i;
1.12 markus 468:
1.131 naddy 469: if ((r = ssh_fetch_identitylist(agent_fd, &idlist)) != 0) {
470: if (r != SSH_ERR_AGENT_NO_IDENTITIES)
471: fprintf(stderr, "error fetching identities: %s\n",
472: ssh_err(r));
473: else
474: printf("The agent has no identities.\n");
475: return -1;
476: }
477: for (i = 0; i < idlist->nkeys; i++) {
478: if (do_fp) {
479: fp = sshkey_fingerprint(idlist->keys[i],
480: fingerprint_hash, SSH_FP_DEFAULT);
481: printf("%u %s %s (%s)\n", sshkey_size(idlist->keys[i]),
482: fp == NULL ? "(null)" : fp, idlist->comments[i],
483: sshkey_type(idlist->keys[i]));
484: free(fp);
485: } else {
486: if ((r = sshkey_write(idlist->keys[i], stdout)) != 0) {
487: fprintf(stderr, "sshkey_write: %s\n",
488: ssh_err(r));
489: continue;
1.12 markus 490: }
1.135 markus 491: fprintf(stdout, " %s", idlist->comments[i]);
492: left = sshkey_signatures_left(idlist->keys[i]);
493: if (left > 0)
494: fprintf(stdout,
495: " [signatures left %d]", left);
496: fprintf(stdout, "\n");
1.12 markus 497: }
1.50 markus 498: }
1.131 naddy 499: ssh_free_identitylist(idlist);
1.50 markus 500: return 0;
1.1 deraadt 501: }
502:
1.48 djm 503: static int
1.116 djm 504: lock_agent(int agent_fd, int lock)
1.54 markus 505: {
506: char prompt[100], *p1, *p2;
1.116 djm 507: int r, passok = 1, ret = -1;
1.61 deraadt 508:
1.54 markus 509: strlcpy(prompt, "Enter lock password: ", sizeof(prompt));
510: p1 = read_passphrase(prompt, RP_ALLOW_STDIN);
511: if (lock) {
512: strlcpy(prompt, "Again: ", sizeof prompt);
513: p2 = read_passphrase(prompt, RP_ALLOW_STDIN);
514: if (strcmp(p1, p2) != 0) {
515: fprintf(stderr, "Passwords do not match.\n");
516: passok = 0;
517: }
1.109 djm 518: explicit_bzero(p2, strlen(p2));
1.106 djm 519: free(p2);
1.54 markus 520: }
1.116 djm 521: if (passok) {
522: if ((r = ssh_lock_agent(agent_fd, lock, p1)) == 0) {
523: fprintf(stderr, "Agent %slocked.\n", lock ? "" : "un");
524: ret = 0;
525: } else {
526: fprintf(stderr, "Failed to %slock agent: %s\n",
527: lock ? "" : "un", ssh_err(r));
528: }
529: }
1.109 djm 530: explicit_bzero(p1, strlen(p1));
1.106 djm 531: free(p1);
1.62 markus 532: return (ret);
1.54 markus 533: }
534:
535: static int
1.143 djm 536: do_file(int agent_fd, int deleting, int key_only, char *file, int qflag,
537: const char *skprovider)
1.48 djm 538: {
539: if (deleting) {
1.134 dlg 540: if (delete_file(agent_fd, file, key_only, qflag) == -1)
1.48 djm 541: return -1;
542: } else {
1.143 djm 543: if (add_file(agent_fd, file, key_only, qflag, skprovider) == -1)
1.48 djm 544: return -1;
545: }
546: return 0;
547: }
548:
1.42 markus 549: static void
550: usage(void)
551: {
1.90 sobrado 552: fprintf(stderr, "usage: %s [options] [file ...]\n", __progname);
1.45 jakob 553: fprintf(stderr, "Options:\n");
554: fprintf(stderr, " -l List fingerprints of all identities.\n");
1.115 djm 555: fprintf(stderr, " -E hash Specify hash algorithm used for fingerprints.\n");
1.45 jakob 556: fprintf(stderr, " -L List public key parameters of all identities.\n");
1.103 djm 557: fprintf(stderr, " -k Load only keys and not certificates.\n");
558: fprintf(stderr, " -c Require confirmation to sign using identities\n");
1.135 markus 559: fprintf(stderr, " -m minleft Maxsign is only changed if less than minleft are left (for XMSS)\n");
560: fprintf(stderr, " -M maxsign Maximum number of signatures allowed (for XMSS)\n");
1.103 djm 561: fprintf(stderr, " -t life Set lifetime (in seconds) when adding identities.\n");
1.45 jakob 562: fprintf(stderr, " -d Delete identity.\n");
563: fprintf(stderr, " -D Delete all identities.\n");
1.55 markus 564: fprintf(stderr, " -x Lock agent.\n");
1.63 markus 565: fprintf(stderr, " -X Unlock agent.\n");
1.92 markus 566: fprintf(stderr, " -s pkcs11 Add keys from PKCS#11 provider.\n");
567: fprintf(stderr, " -e pkcs11 Remove keys provided by PKCS#11 provider.\n");
1.137 djm 568: fprintf(stderr, " -T pubkey Test if ssh-agent can access matching private key.\n");
1.143 djm 569: fprintf(stderr, " -S provider Specify security key provider.\n");
1.134 dlg 570: fprintf(stderr, " -q Be quiet after a successful operation.\n");
1.138 djm 571: fprintf(stderr, " -v Be more verbose.\n");
1.42 markus 572: }
573:
1.2 provos 574: int
1.7 markus 575: main(int argc, char **argv)
1.1 deraadt 576: {
1.43 markus 577: extern char *optarg;
578: extern int optind;
1.116 djm 579: int agent_fd;
1.143 djm 580: char *pkcs11provider = NULL, *skprovider = NULL;
1.116 djm 581: int r, i, ch, deleting = 0, ret = 0, key_only = 0;
1.137 djm 582: int xflag = 0, lflag = 0, Dflag = 0, qflag = 0, Tflag = 0;
1.138 djm 583: SyslogFacility log_facility = SYSLOG_FACILITY_AUTH;
584: LogLevel log_level = SYSLOG_LEVEL_INFO;
1.73 djm 585:
586: /* Ensure that fds 0, 1 and 2 are open or directed to /dev/null */
587: sanitise_stdfd();
1.12 markus 588:
1.141 djm 589: #ifdef WITH_OPENSSL
1.100 djm 590: OpenSSL_add_all_algorithms();
1.141 djm 591: #endif
1.138 djm 592: log_init(__progname, log_level, log_facility, 1);
593:
1.114 millert 594: setvbuf(stdout, NULL, _IOLBF, 0);
1.19 markus 595:
1.116 djm 596: /* First, get a connection to the authentication agent. */
597: switch (r = ssh_get_authentication_socket(&agent_fd)) {
598: case 0:
599: break;
600: case SSH_ERR_AGENT_NOT_PRESENT:
601: fprintf(stderr, "Could not open a connection to your "
602: "authentication agent.\n");
603: exit(2);
604: default:
605: fprintf(stderr, "Error connecting to agent: %s\n", ssh_err(r));
1.50 markus 606: exit(2);
1.12 markus 607: }
1.116 djm 608:
1.143 djm 609: skprovider = getenv("SSH_SK_PROVIDER");
610:
611: while ((ch = getopt(argc, argv, "vklLcdDTxXE:e:M:m:qs:S:t:")) != -1) {
1.43 markus 612: switch (ch) {
1.138 djm 613: case 'v':
614: if (log_level == SYSLOG_LEVEL_INFO)
615: log_level = SYSLOG_LEVEL_DEBUG1;
616: else if (log_level < SYSLOG_LEVEL_DEBUG3)
617: log_level++;
618: break;
1.115 djm 619: case 'E':
620: fingerprint_hash = ssh_digest_alg_by_name(optarg);
621: if (fingerprint_hash == -1)
622: fatal("Invalid hash algorithm \"%s\"", optarg);
623: break;
1.102 djm 624: case 'k':
625: key_only = 1;
626: break;
1.43 markus 627: case 'l':
628: case 'L':
1.115 djm 629: if (lflag != 0)
630: fatal("-%c flag already specified", lflag);
631: lflag = ch;
632: break;
1.54 markus 633: case 'x':
634: case 'X':
1.115 djm 635: if (xflag != 0)
636: fatal("-%c flag already specified", xflag);
637: xflag = ch;
638: break;
1.65 markus 639: case 'c':
640: confirm = 1;
1.135 markus 641: break;
642: case 'm':
643: minleft = (int)strtonum(optarg, 1, UINT_MAX, NULL);
644: if (minleft == 0) {
645: usage();
646: ret = 1;
647: goto done;
648: }
649: break;
650: case 'M':
651: maxsign = (int)strtonum(optarg, 1, UINT_MAX, NULL);
652: if (maxsign == 0) {
653: usage();
654: ret = 1;
655: goto done;
656: }
1.43 markus 657: break;
658: case 'd':
1.12 markus 659: deleting = 1;
1.43 markus 660: break;
661: case 'D':
1.115 djm 662: Dflag = 1;
663: break;
1.43 markus 664: case 's':
1.92 markus 665: pkcs11provider = optarg;
1.43 markus 666: break;
1.143 djm 667: case 'S':
668: skprovider = optarg;
669: break;
1.43 markus 670: case 'e':
1.47 deraadt 671: deleting = 1;
1.92 markus 672: pkcs11provider = optarg;
1.56 markus 673: break;
674: case 't':
1.57 stevesk 675: if ((lifetime = convtime(optarg)) == -1) {
676: fprintf(stderr, "Invalid lifetime\n");
677: ret = 1;
678: goto done;
679: }
1.43 markus 680: break;
1.134 dlg 681: case 'q':
682: qflag = 1;
683: break;
1.137 djm 684: case 'T':
685: Tflag = 1;
686: break;
1.43 markus 687: default:
688: usage();
1.46 djm 689: ret = 1;
690: goto done;
1.42 markus 691: }
692: }
1.138 djm 693: log_init(__progname, log_level, log_facility, 1);
1.115 djm 694:
695: if ((xflag != 0) + (lflag != 0) + (Dflag != 0) > 1)
696: fatal("Invalid combination of actions");
697: else if (xflag) {
1.116 djm 698: if (lock_agent(agent_fd, xflag == 'x' ? 1 : 0) == -1)
1.115 djm 699: ret = 1;
700: goto done;
701: } else if (lflag) {
1.116 djm 702: if (list_identities(agent_fd, lflag == 'l' ? 1 : 0) == -1)
1.115 djm 703: ret = 1;
704: goto done;
705: } else if (Dflag) {
1.136 djm 706: if (delete_all(agent_fd, qflag) == -1)
1.115 djm 707: ret = 1;
708: goto done;
709: }
1.145 djm 710:
711: if (skprovider == NULL)
712: skprovider = "internal";
1.115 djm 713:
1.43 markus 714: argc -= optind;
715: argv += optind;
1.137 djm 716: if (Tflag) {
717: if (argc <= 0)
718: fatal("no keys to test");
719: for (r = i = 0; i < argc; i++)
720: r |= test_key(agent_fd, argv[i]);
721: ret = r == 0 ? 0 : 1;
722: goto done;
723: }
1.92 markus 724: if (pkcs11provider != NULL) {
1.136 djm 725: if (update_card(agent_fd, !deleting, pkcs11provider,
726: qflag) == -1)
1.46 djm 727: ret = 1;
1.43 markus 728: goto done;
1.12 markus 729: }
1.43 markus 730: if (argc == 0) {
1.117 deraadt 731: char buf[PATH_MAX];
1.48 djm 732: struct passwd *pw;
1.52 markus 733: struct stat st;
734: int count = 0;
1.48 djm 735:
736: if ((pw = getpwuid(getuid())) == NULL) {
1.20 deraadt 737: fprintf(stderr, "No user found with uid %u\n",
738: (u_int)getuid());
1.46 djm 739: ret = 1;
740: goto done;
1.12 markus 741: }
1.48 djm 742:
1.71 deraadt 743: for (i = 0; default_files[i]; i++) {
1.51 markus 744: snprintf(buf, sizeof(buf), "%s/%s", pw->pw_dir,
1.48 djm 745: default_files[i]);
1.140 deraadt 746: if (stat(buf, &st) == -1)
1.52 markus 747: continue;
1.134 dlg 748: if (do_file(agent_fd, deleting, key_only, buf,
1.143 djm 749: qflag, skprovider) == -1)
1.46 djm 750: ret = 1;
1.52 markus 751: else
752: count++;
1.46 djm 753: }
1.52 markus 754: if (count == 0)
755: ret = 1;
1.43 markus 756: } else {
1.71 deraadt 757: for (i = 0; i < argc; i++) {
1.116 djm 758: if (do_file(agent_fd, deleting, key_only,
1.143 djm 759: argv[i], qflag, skprovider) == -1)
1.48 djm 760: ret = 1;
1.43 markus 761: }
1.12 markus 762: }
1.33 markus 763: clear_pass();
1.43 markus 764:
765: done:
1.116 djm 766: ssh_close_authentication_socket(agent_fd);
1.46 djm 767: return ret;
1.1 deraadt 768: }
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