2 * Author: Tatu Ylonen <ylo@cs.hut.fi>
3 * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
5 * Adds an identity to the authentication server, or removes an identity.
7 * As far as I am concerned, the code I have written for this software
8 * can be used freely for any purpose. Any derived versions of this
9 * software must be clearly marked as such, and if the derived work is
10 * incompatible with the protocol description in the RFC file, it must be
11 * called by a name other than "ssh" or "Secure Shell".
13 * SSH2 implementation,
14 * Copyright (c) 2000, 2001 Markus Friedl. All rights reserved.
16 * Redistribution and use in source and binary forms, with or without
17 * modification, are permitted provided that the following conditions
19 * 1. Redistributions of source code must retain the above copyright
20 * notice, this list of conditions and the following disclaimer.
21 * 2. Redistributions in binary form must reproduce the above copyright
22 * notice, this list of conditions and the following disclaimer in the
23 * documentation and/or other materials provided with the distribution.
25 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
26 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
27 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
28 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
29 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
30 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
31 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
32 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
33 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
34 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
38 RCSID("$OpenBSD: ssh-add.c,v 1.75 2006/02/20 17:19:54 stevesk Exp $");
40 #include <sys/types.h>
43 #include <openssl/evp.h>
52 #include "pathnames.h"
56 extern char *__progname;
58 /* Default files to add */
59 static char *default_files[] = {
60 _PATH_SSH_CLIENT_ID_RSA,
61 _PATH_SSH_CLIENT_ID_DSA,
62 _PATH_SSH_CLIENT_IDENTITY,
66 /* Default lifetime (0 == forever) */
67 static int lifetime = 0;
69 /* User has to confirm key use */
70 static int confirm = 0;
72 /* we keep a cache of one passphrases */
73 static char *pass = NULL;
78 memset(pass, 0, strlen(pass));
85 delete_file(AuthenticationConnection *ac, const char *filename)
91 public = key_load_public(filename, &comment);
93 printf("Bad key file %s\n", filename);
96 if (ssh_remove_identity(ac, public)) {
97 fprintf(stderr, "Identity removed: %s (%s)\n", filename, comment);
100 fprintf(stderr, "Could not remove identity: %s\n", filename);
108 /* Send a request to remove all identities. */
110 delete_all(AuthenticationConnection *ac)
114 if (ssh_remove_all_identities(ac, 1))
116 /* ignore error-code for ssh2 */
117 ssh_remove_all_identities(ac, 2);
120 fprintf(stderr, "All identities removed.\n");
122 fprintf(stderr, "Failed to remove all identities.\n");
128 add_file(AuthenticationConnection *ac, const char *filename)
132 char *comment = NULL;
136 if (stat(filename, &st) < 0) {
140 /* At first, try empty passphrase */
141 private = key_load_private(filename, "", &comment);
143 comment = xstrdup(filename);
145 if (private == NULL && pass != NULL)
146 private = key_load_private(filename, pass, NULL);
147 if (private == NULL) {
148 /* clear passphrase since it did not work */
150 snprintf(msg, sizeof msg, "Enter passphrase for %.200s: ",
153 pass = read_passphrase(msg, RP_ALLOW_STDIN);
154 if (strcmp(pass, "") == 0) {
159 private = key_load_private(filename, pass, &comment);
163 snprintf(msg, sizeof msg,
164 "Bad passphrase, try again for %.200s: ", comment);
168 if (ssh_add_identity_constrained(ac, private, comment, lifetime,
170 fprintf(stderr, "Identity added: %s (%s)\n", filename, comment);
174 "Lifetime set to %d seconds\n", lifetime);
177 "The user has to confirm each use of the key\n");
178 } else if (ssh_add_identity(ac, private, comment)) {
179 fprintf(stderr, "Identity added: %s (%s)\n", filename, comment);
182 fprintf(stderr, "Could not add identity: %s\n", filename);
192 update_card(AuthenticationConnection *ac, int add, const char *id)
197 pin = read_passphrase("Enter passphrase for smartcard: ", RP_ALLOW_STDIN);
201 if (ssh_update_card(ac, add, id, pin, lifetime, confirm)) {
202 fprintf(stderr, "Card %s: %s\n",
203 add ? "added" : "removed", id);
206 fprintf(stderr, "Could not %s card: %s\n",
207 add ? "add" : "remove", id);
215 list_identities(AuthenticationConnection *ac, int do_fp)
219 int had_identities = 0;
222 for (version = 1; version <= 2; version++) {
223 for (key = ssh_get_first_identity(ac, &comment, version);
225 key = ssh_get_next_identity(ac, &comment, version)) {
228 fp = key_fingerprint(key, SSH_FP_MD5,
230 printf("%d %s %s (%s)\n",
231 key_size(key), fp, comment, key_type(key));
234 if (!key_write(key, stdout))
235 fprintf(stderr, "key_write failed");
236 fprintf(stdout, " %s\n", comment);
242 if (!had_identities) {
243 printf("The agent has no identities.\n");
250 lock_agent(AuthenticationConnection *ac, int lock)
252 char prompt[100], *p1, *p2;
253 int passok = 1, ret = -1;
255 strlcpy(prompt, "Enter lock password: ", sizeof(prompt));
256 p1 = read_passphrase(prompt, RP_ALLOW_STDIN);
258 strlcpy(prompt, "Again: ", sizeof prompt);
259 p2 = read_passphrase(prompt, RP_ALLOW_STDIN);
260 if (strcmp(p1, p2) != 0) {
261 fprintf(stderr, "Passwords do not match.\n");
264 memset(p2, 0, strlen(p2));
267 if (passok && ssh_lock_agent(ac, lock, p1)) {
268 fprintf(stderr, "Agent %slocked.\n", lock ? "" : "un");
271 fprintf(stderr, "Failed to %slock agent.\n", lock ? "" : "un");
272 memset(p1, 0, strlen(p1));
278 do_file(AuthenticationConnection *ac, int deleting, char *file)
281 if (delete_file(ac, file) == -1)
284 if (add_file(ac, file) == -1)
293 fprintf(stderr, "Usage: %s [options]\n", __progname);
294 fprintf(stderr, "Options:\n");
295 fprintf(stderr, " -l List fingerprints of all identities.\n");
296 fprintf(stderr, " -L List public key parameters of all identities.\n");
297 fprintf(stderr, " -d Delete identity.\n");
298 fprintf(stderr, " -D Delete all identities.\n");
299 fprintf(stderr, " -x Lock agent.\n");
300 fprintf(stderr, " -X Unlock agent.\n");
301 fprintf(stderr, " -t life Set lifetime (in seconds) when adding identities.\n");
302 fprintf(stderr, " -c Require confirmation to sign using identities\n");
304 fprintf(stderr, " -s reader Add key in smartcard reader.\n");
305 fprintf(stderr, " -e reader Remove key in smartcard reader.\n");
310 main(int argc, char **argv)
314 AuthenticationConnection *ac = NULL;
315 char *sc_reader_id = NULL;
316 int i, ch, deleting = 0, ret = 0;
318 /* Ensure that fds 0, 1 and 2 are open or directed to /dev/null */
321 __progname = ssh_get_progname(argv[0]);
325 SSLeay_add_all_algorithms();
327 /* At first, get a connection to the authentication agent. */
328 ac = ssh_get_authentication_connection();
331 "Could not open a connection to your authentication agent.\n");
334 while ((ch = getopt(argc, argv, "lLcdDxXe:s:t:")) != -1) {
338 if (list_identities(ac, ch == 'l' ? 1 : 0) == -1)
344 if (lock_agent(ac, ch == 'x' ? 1 : 0) == -1)
355 if (delete_all(ac) == -1)
360 sc_reader_id = optarg;
364 sc_reader_id = optarg;
367 if ((lifetime = convtime(optarg)) == -1) {
368 fprintf(stderr, "Invalid lifetime\n");
381 if (sc_reader_id != NULL) {
382 if (update_card(ac, !deleting, sc_reader_id) == -1)
387 char buf[MAXPATHLEN];
392 if ((pw = getpwuid(getuid())) == NULL) {
393 fprintf(stderr, "No user found with uid %u\n",
399 for (i = 0; default_files[i]; i++) {
400 snprintf(buf, sizeof(buf), "%s/%s", pw->pw_dir,
402 if (stat(buf, &st) < 0)
404 if (do_file(ac, deleting, buf) == -1)
412 for (i = 0; i < argc; i++) {
413 if (do_file(ac, deleting, argv[i]) == -1)
420 ssh_close_authentication_connection(ac);