blob: 979164cae60e62aba8796b28bd7fa7fe192d3141 [file] [log] [blame]
Damien Millerd4a8b7e1999-10-27 13:42:43 +10001/*
Damien Miller95def091999-11-25 00:26:21 +11002 * Author: Tatu Ylonen <ylo@cs.hut.fi>
3 * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
4 * All rights reserved
Damien Miller95def091999-11-25 00:26:21 +11005 * Adds an identity to the authentication server, or removes an identity.
Damien Millerad833b32000-08-23 10:46:23 +10006 *
Damien Millere4340be2000-09-16 13:29:08 +11007 * 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".
12 *
Damien Millerad833b32000-08-23 10:46:23 +100013 * SSH2 implementation,
Ben Lindstrom44697232001-07-04 03:32:30 +000014 * Copyright (c) 2000, 2001 Markus Friedl. All rights reserved.
Damien Millere4340be2000-09-16 13:29:08 +110015 *
16 * Redistribution and use in source and binary forms, with or without
17 * modification, are permitted provided that the following conditions
18 * are met:
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.
24 *
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.
Damien Miller95def091999-11-25 00:26:21 +110035 */
Damien Millerd4a8b7e1999-10-27 13:42:43 +100036
37#include "includes.h"
Ben Lindstromddfb1e32001-08-06 22:06:35 +000038RCSID("$OpenBSD: ssh-add.c,v 1.45 2001/08/03 10:31:30 jakob Exp $");
Damien Millereba71ba2000-04-29 23:57:08 +100039
Damien Millerad833b32000-08-23 10:46:23 +100040#include <openssl/evp.h>
Damien Millerd4a8b7e1999-10-27 13:42:43 +100041
Damien Millerd4a8b7e1999-10-27 13:42:43 +100042#include "ssh.h"
Ben Lindstrom226cfa02001-01-22 05:34:40 +000043#include "rsa.h"
44#include "log.h"
Damien Millerd4a8b7e1999-10-27 13:42:43 +100045#include "xmalloc.h"
Damien Millereba71ba2000-04-29 23:57:08 +100046#include "key.h"
Damien Miller994cf142000-07-21 10:19:44 +100047#include "authfd.h"
Damien Millereba71ba2000-04-29 23:57:08 +100048#include "authfile.h"
Ben Lindstrom226cfa02001-01-22 05:34:40 +000049#include "pathnames.h"
50#include "readpass.h"
Damien Millerd4a8b7e1999-10-27 13:42:43 +100051
Damien Miller3f905871999-11-15 17:10:57 +110052#ifdef HAVE___PROGNAME
53extern char *__progname;
Ben Lindstrom49a79c02000-11-17 03:47:20 +000054#else
55char *__progname;
56#endif
Damien Miller3f905871999-11-15 17:10:57 +110057
Ben Lindstromddfb1e32001-08-06 22:06:35 +000058/* argv0 */
59extern char *__progname;
60
Ben Lindstromee617942001-04-10 02:45:32 +000061/* we keep a cache of one passphrases */
62static char *pass = NULL;
Ben Lindstrombba81212001-06-25 05:01:22 +000063static void
Ben Lindstromee617942001-04-10 02:45:32 +000064clear_pass(void)
65{
66 if (pass) {
67 memset(pass, 0, strlen(pass));
68 xfree(pass);
69 pass = NULL;
70 }
71}
72
Ben Lindstrombba81212001-06-25 05:01:22 +000073static void
Damien Miller01ab4a21999-10-28 15:23:30 +100074delete_file(AuthenticationConnection *ac, const char *filename)
Damien Millerd4a8b7e1999-10-27 13:42:43 +100075{
Damien Millereba71ba2000-04-29 23:57:08 +100076 Key *public;
Ben Lindstromd5730a82001-04-08 18:04:36 +000077 char *comment = NULL;
Damien Millerd4a8b7e1999-10-27 13:42:43 +100078
Ben Lindstromd0fca422001-03-26 13:44:06 +000079 public = key_load_public(filename, &comment);
80 if (public == NULL) {
81 printf("Bad key file %s\n", filename);
82 return;
Damien Miller95def091999-11-25 00:26:21 +110083 }
Damien Millerad833b32000-08-23 10:46:23 +100084 if (ssh_remove_identity(ac, public))
Damien Miller95def091999-11-25 00:26:21 +110085 fprintf(stderr, "Identity removed: %s (%s)\n", filename, comment);
86 else
87 fprintf(stderr, "Could not remove identity: %s\n", filename);
Damien Millereba71ba2000-04-29 23:57:08 +100088 key_free(public);
Damien Miller95def091999-11-25 00:26:21 +110089 xfree(comment);
Damien Millerd4a8b7e1999-10-27 13:42:43 +100090}
91
Damien Millerad833b32000-08-23 10:46:23 +100092/* Send a request to remove all identities. */
Ben Lindstrombba81212001-06-25 05:01:22 +000093static void
Damien Miller01ab4a21999-10-28 15:23:30 +100094delete_all(AuthenticationConnection *ac)
Damien Millerd4a8b7e1999-10-27 13:42:43 +100095{
Damien Millerad833b32000-08-23 10:46:23 +100096 int success = 1;
97
98 if (!ssh_remove_all_identities(ac, 1))
99 success = 0;
100 /* ignore error-code for ssh2 */
101 ssh_remove_all_identities(ac, 2);
102
103 if (success)
Damien Miller95def091999-11-25 00:26:21 +1100104 fprintf(stderr, "All identities removed.\n");
105 else
Ben Lindstrombf555ba2001-01-18 02:04:35 +0000106 fprintf(stderr, "Failed to remove all identities.\n");
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000107}
108
Ben Lindstrombba81212001-06-25 05:01:22 +0000109static void
Damien Miller01ab4a21999-10-28 15:23:30 +1000110add_file(AuthenticationConnection *ac, const char *filename)
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000111{
Damien Millerad833b32000-08-23 10:46:23 +1000112 struct stat st;
Damien Millereba71ba2000-04-29 23:57:08 +1000113 Key *private;
Ben Lindstrom5eb97b62001-04-19 20:33:07 +0000114 char *comment = NULL;
115 char msg[1024];
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000116
Damien Millerad833b32000-08-23 10:46:23 +1000117 if (stat(filename, &st) < 0) {
118 perror(filename);
119 exit(1);
120 }
Damien Miller95def091999-11-25 00:26:21 +1100121 /* At first, try empty passphrase */
Ben Lindstromd0fca422001-03-26 13:44:06 +0000122 private = key_load_private(filename, "", &comment);
123 if (comment == NULL)
124 comment = xstrdup(filename);
Ben Lindstromee617942001-04-10 02:45:32 +0000125 /* try last */
126 if (private == NULL && pass != NULL)
127 private = key_load_private(filename, pass, NULL);
Ben Lindstromd0fca422001-03-26 13:44:06 +0000128 if (private == NULL) {
Ben Lindstromee617942001-04-10 02:45:32 +0000129 /* clear passphrase since it did not work */
130 clear_pass();
Ben Lindstrom8a137132001-05-02 22:40:12 +0000131 snprintf(msg, sizeof msg, "Enter passphrase for %.200s: ",
Ben Lindstrom5eb97b62001-04-19 20:33:07 +0000132 comment);
Damien Miller5428f641999-11-25 11:54:57 +1100133 for (;;) {
Ben Lindstrom949974b2001-06-25 05:20:31 +0000134 pass = read_passphrase(msg, RP_ALLOW_STDIN);
Damien Miller95def091999-11-25 00:26:21 +1100135 if (strcmp(pass, "") == 0) {
Ben Lindstrom7457f2a2001-04-14 23:10:09 +0000136 clear_pass();
Ben Lindstromd0fca422001-03-26 13:44:06 +0000137 xfree(comment);
Damien Miller95def091999-11-25 00:26:21 +1100138 return;
139 }
Ben Lindstromd0fca422001-03-26 13:44:06 +0000140 private = key_load_private(filename, pass, &comment);
Ben Lindstromd0fca422001-03-26 13:44:06 +0000141 if (private != NULL)
Damien Miller95def091999-11-25 00:26:21 +1100142 break;
Ben Lindstromee617942001-04-10 02:45:32 +0000143 clear_pass();
Ben Lindstrom8a137132001-05-02 22:40:12 +0000144 strlcpy(msg, "Bad passphrase, try again: ", sizeof msg);
Damien Miller95def091999-11-25 00:26:21 +1100145 }
146 }
Ben Lindstromd0fca422001-03-26 13:44:06 +0000147 if (ssh_add_identity(ac, private, comment))
148 fprintf(stderr, "Identity added: %s (%s)\n", filename, comment);
Damien Miller95def091999-11-25 00:26:21 +1100149 else
150 fprintf(stderr, "Could not add identity: %s\n", filename);
Ben Lindstromd0fca422001-03-26 13:44:06 +0000151 xfree(comment);
Damien Millereba71ba2000-04-29 23:57:08 +1000152 key_free(private);
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000153}
154
Ben Lindstrombba81212001-06-25 05:01:22 +0000155static void
Ben Lindstromf7db3bb2001-08-06 21:35:51 +0000156update_card(AuthenticationConnection *ac, int add, const char *id)
Ben Lindstrom036a6b22001-07-04 03:50:02 +0000157{
158 if (ssh_update_card(ac, add, id))
Ben Lindstromf7db3bb2001-08-06 21:35:51 +0000159 fprintf(stderr, "Card %s: %s\n",
Ben Lindstrom036a6b22001-07-04 03:50:02 +0000160 add ? "added" : "removed", id);
161 else
Ben Lindstromf7db3bb2001-08-06 21:35:51 +0000162 fprintf(stderr, "Could not %s card: %s\n",
Ben Lindstrom036a6b22001-07-04 03:50:02 +0000163 add ? "add" : "remove", id);
164}
165
166static void
Ben Lindstromcfccef92001-03-13 04:57:58 +0000167list_identities(AuthenticationConnection *ac, int do_fp)
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000168{
Damien Millerad833b32000-08-23 10:46:23 +1000169 Key *key;
Ben Lindstromcfccef92001-03-13 04:57:58 +0000170 char *comment, *fp;
Damien Millerad833b32000-08-23 10:46:23 +1000171 int had_identities = 0;
172 int version;
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000173
Damien Millerad833b32000-08-23 10:46:23 +1000174 for (version = 1; version <= 2; version++) {
175 for (key = ssh_get_first_identity(ac, &comment, version);
176 key != NULL;
177 key = ssh_get_next_identity(ac, &comment, version)) {
178 had_identities = 1;
Ben Lindstromcfccef92001-03-13 04:57:58 +0000179 if (do_fp) {
180 fp = key_fingerprint(key, SSH_FP_MD5,
181 SSH_FP_HEX);
Damien Miller0bc1bd82000-11-13 22:57:25 +1100182 printf("%d %s %s (%s)\n",
Ben Lindstromcfccef92001-03-13 04:57:58 +0000183 key_size(key), fp, comment, key_type(key));
184 xfree(fp);
Damien Miller95def091999-11-25 00:26:21 +1100185 } else {
Damien Millerad833b32000-08-23 10:46:23 +1000186 if (!key_write(key, stdout))
187 fprintf(stderr, "key_write failed");
188 fprintf(stdout, " %s\n", comment);
Damien Miller95def091999-11-25 00:26:21 +1100189 }
Damien Millerad833b32000-08-23 10:46:23 +1000190 key_free(key);
191 xfree(comment);
Damien Miller95def091999-11-25 00:26:21 +1100192 }
Damien Miller10f6f6b1999-11-17 17:29:08 +1100193 }
Damien Miller95def091999-11-25 00:26:21 +1100194 if (!had_identities)
195 printf("The agent has no identities.\n");
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000196}
197
Ben Lindstrom036a6b22001-07-04 03:50:02 +0000198static void
199usage(void)
200{
Ben Lindstromddfb1e32001-08-06 22:06:35 +0000201 fprintf(stderr, "Usage: %s [options]\n", __progname);
202 fprintf(stderr, "Options:\n");
203 fprintf(stderr, " -l List fingerprints of all identities.\n");
204 fprintf(stderr, " -L List public key parameters of all identities.\n");
205 fprintf(stderr, " -d Delete identity.\n");
206 fprintf(stderr, " -D Delete all identities.\n");
207#ifdef SMARTCARD
208 fprintf(stderr, " -s reader Add key in smartcard reader.\n");
209 fprintf(stderr, " -e reader Remove key in smartcard reader.\n");
210#endif
Ben Lindstrom036a6b22001-07-04 03:50:02 +0000211}
212
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000213int
Damien Miller01ab4a21999-10-28 15:23:30 +1000214main(int argc, char **argv)
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000215{
Ben Lindstrom44e49af2001-07-04 05:03:51 +0000216 extern char *optarg;
217 extern int optind;
Damien Miller95def091999-11-25 00:26:21 +1100218 AuthenticationConnection *ac = NULL;
219 struct passwd *pw;
220 char buf[1024];
Ben Lindstromf7db3bb2001-08-06 21:35:51 +0000221 char *sc_reader_id = NULL;
222 int i, ch, deleting = 0;
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000223
Ben Lindstrom49a79c02000-11-17 03:47:20 +0000224 __progname = get_progname(argv[0]);
Damien Millerf9b625c2000-07-09 22:42:32 +1000225 init_rng();
Ben Lindstrom93d1fe82001-05-06 02:57:20 +0000226 seed_rng();
Damien Millerf9b625c2000-07-09 22:42:32 +1000227
Kevin Stevesef4eea92001-02-05 12:42:17 +0000228 SSLeay_add_all_algorithms();
Damien Millerad833b32000-08-23 10:46:23 +1000229
Damien Miller95def091999-11-25 00:26:21 +1100230 /* At first, get a connection to the authentication agent. */
231 ac = ssh_get_authentication_connection();
232 if (ac == NULL) {
233 fprintf(stderr, "Could not open a connection to your authentication agent.\n");
234 exit(1);
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000235 }
Ben Lindstrom44e49af2001-07-04 05:03:51 +0000236 while ((ch = getopt(argc, argv, "lLdDe:s:")) != -1) {
237 switch (ch) {
238 case 'l':
239 case 'L':
240 list_identities(ac, ch == 'l' ? 1 : 0);
241 goto done;
242 break;
243 case 'd':
Damien Miller95def091999-11-25 00:26:21 +1100244 deleting = 1;
Ben Lindstrom44e49af2001-07-04 05:03:51 +0000245 break;
246 case 'D':
Damien Miller95def091999-11-25 00:26:21 +1100247 delete_all(ac);
Ben Lindstrom44e49af2001-07-04 05:03:51 +0000248 goto done;
249 break;
250 case 's':
Ben Lindstromf7db3bb2001-08-06 21:35:51 +0000251 sc_reader_id = optarg;
Ben Lindstrom44e49af2001-07-04 05:03:51 +0000252 break;
253 case 'e':
Ben Lindstrom036a6b22001-07-04 03:50:02 +0000254 deleting = 1;
Ben Lindstromf7db3bb2001-08-06 21:35:51 +0000255 sc_reader_id = optarg;
Ben Lindstrom44e49af2001-07-04 05:03:51 +0000256 break;
257 default:
258 usage();
259 exit(1);
260 break;
Ben Lindstrom036a6b22001-07-04 03:50:02 +0000261 }
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000262 }
Ben Lindstrom44e49af2001-07-04 05:03:51 +0000263 argc -= optind;
264 argv += optind;
Ben Lindstromf7db3bb2001-08-06 21:35:51 +0000265 if (sc_reader_id != NULL) {
266 update_card(ac, !deleting, sc_reader_id);
Ben Lindstrom44e49af2001-07-04 05:03:51 +0000267 goto done;
Ben Lindstrom036a6b22001-07-04 03:50:02 +0000268 }
Ben Lindstrom44e49af2001-07-04 05:03:51 +0000269 if (argc == 0) {
Damien Miller95def091999-11-25 00:26:21 +1100270 pw = getpwuid(getuid());
271 if (!pw) {
Damien Millercaf6dd62000-08-29 11:33:50 +1100272 fprintf(stderr, "No user found with uid %u\n",
273 (u_int)getuid());
Damien Miller95def091999-11-25 00:26:21 +1100274 ssh_close_authentication_connection(ac);
275 exit(1);
276 }
Ben Lindstrom226cfa02001-01-22 05:34:40 +0000277 snprintf(buf, sizeof buf, "%s/%s", pw->pw_dir, _PATH_SSH_CLIENT_IDENTITY);
Damien Miller95def091999-11-25 00:26:21 +1100278 if (deleting)
279 delete_file(ac, buf);
280 else
281 add_file(ac, buf);
Ben Lindstrom44e49af2001-07-04 05:03:51 +0000282 } else {
283 for (i = 0; i < argc; i++) {
284 if (deleting)
285 delete_file(ac, argv[i]);
286 else
287 add_file(ac, argv[i]);
288 }
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000289 }
Ben Lindstromee617942001-04-10 02:45:32 +0000290 clear_pass();
Ben Lindstrom44e49af2001-07-04 05:03:51 +0000291
292done:
Damien Miller95def091999-11-25 00:26:21 +1100293 ssh_close_authentication_connection(ac);
294 exit(0);
Damien Millerd4a8b7e1999-10-27 13:42:43 +1000295}