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8efc0c15 | 1 | /* |
5260325f | 2 | * Author: Tatu Ylonen <ylo@cs.hut.fi> |
3 | * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland | |
4 | * All rights reserved | |
5260325f | 5 | * Adds an identity to the authentication server, or removes an identity. |
2e73a022 | 6 | * |
bcbf86ec | 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". | |
12 | * | |
2e73a022 | 13 | * SSH2 implementation, |
a96070d4 | 14 | * Copyright (c) 2000, 2001 Markus Friedl. All rights reserved. |
bcbf86ec | 15 | * |
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. | |
5260325f | 35 | */ |
8efc0c15 | 36 | |
37 | #include "includes.h" | |
9ff6f66f | 38 | RCSID("$OpenBSD: ssh-add.c,v 1.44 2001/08/01 22:03:33 markus Exp $"); |
8efc0c15 | 39 | |
2e73a022 | 40 | #include <openssl/evp.h> |
a306f2dd | 41 | |
8efc0c15 | 42 | #include "ssh.h" |
42f11eb2 | 43 | #include "rsa.h" |
44 | #include "log.h" | |
8efc0c15 | 45 | #include "xmalloc.h" |
a306f2dd | 46 | #include "key.h" |
4c8722d9 | 47 | #include "authfd.h" |
a306f2dd | 48 | #include "authfile.h" |
42f11eb2 | 49 | #include "pathnames.h" |
50 | #include "readpass.h" | |
8efc0c15 | 51 | |
f601d847 | 52 | #ifdef HAVE___PROGNAME |
53 | extern char *__progname; | |
260d427b | 54 | #else |
55 | char *__progname; | |
56 | #endif | |
f601d847 | 57 | |
a8666d84 | 58 | /* we keep a cache of one passphrases */ |
59 | static char *pass = NULL; | |
396c147e | 60 | static void |
a8666d84 | 61 | clear_pass(void) |
62 | { | |
63 | if (pass) { | |
64 | memset(pass, 0, strlen(pass)); | |
65 | xfree(pass); | |
66 | pass = NULL; | |
67 | } | |
68 | } | |
69 | ||
396c147e | 70 | static void |
5068f573 | 71 | delete_file(AuthenticationConnection *ac, const char *filename) |
8efc0c15 | 72 | { |
a306f2dd | 73 | Key *public; |
d64050ef | 74 | char *comment = NULL; |
5260325f | 75 | |
aeaa3d9e | 76 | public = key_load_public(filename, &comment); |
77 | if (public == NULL) { | |
78 | printf("Bad key file %s\n", filename); | |
79 | return; | |
5260325f | 80 | } |
2e73a022 | 81 | if (ssh_remove_identity(ac, public)) |
5260325f | 82 | fprintf(stderr, "Identity removed: %s (%s)\n", filename, comment); |
83 | else | |
84 | fprintf(stderr, "Could not remove identity: %s\n", filename); | |
a306f2dd | 85 | key_free(public); |
5260325f | 86 | xfree(comment); |
8efc0c15 | 87 | } |
88 | ||
2e73a022 | 89 | /* Send a request to remove all identities. */ |
396c147e | 90 | static void |
5068f573 | 91 | delete_all(AuthenticationConnection *ac) |
8efc0c15 | 92 | { |
2e73a022 | 93 | int success = 1; |
94 | ||
95 | if (!ssh_remove_all_identities(ac, 1)) | |
96 | success = 0; | |
97 | /* ignore error-code for ssh2 */ | |
98 | ssh_remove_all_identities(ac, 2); | |
99 | ||
100 | if (success) | |
5260325f | 101 | fprintf(stderr, "All identities removed.\n"); |
102 | else | |
b5c334cc | 103 | fprintf(stderr, "Failed to remove all identities.\n"); |
8efc0c15 | 104 | } |
105 | ||
396c147e | 106 | static void |
5068f573 | 107 | add_file(AuthenticationConnection *ac, const char *filename) |
8efc0c15 | 108 | { |
2e73a022 | 109 | struct stat st; |
a306f2dd | 110 | Key *private; |
561e5254 | 111 | char *comment = NULL; |
112 | char msg[1024]; | |
5260325f | 113 | |
2e73a022 | 114 | if (stat(filename, &st) < 0) { |
115 | perror(filename); | |
116 | exit(1); | |
117 | } | |
5260325f | 118 | /* At first, try empty passphrase */ |
aeaa3d9e | 119 | private = key_load_private(filename, "", &comment); |
120 | if (comment == NULL) | |
121 | comment = xstrdup(filename); | |
a8666d84 | 122 | /* try last */ |
123 | if (private == NULL && pass != NULL) | |
124 | private = key_load_private(filename, pass, NULL); | |
aeaa3d9e | 125 | if (private == NULL) { |
a8666d84 | 126 | /* clear passphrase since it did not work */ |
127 | clear_pass(); | |
065604bb | 128 | snprintf(msg, sizeof msg, "Enter passphrase for %.200s: ", |
561e5254 | 129 | comment); |
aa3378df | 130 | for (;;) { |
1843a425 | 131 | pass = read_passphrase(msg, RP_ALLOW_STDIN); |
5260325f | 132 | if (strcmp(pass, "") == 0) { |
eae942e2 | 133 | clear_pass(); |
aeaa3d9e | 134 | xfree(comment); |
5260325f | 135 | return; |
136 | } | |
aeaa3d9e | 137 | private = key_load_private(filename, pass, &comment); |
aeaa3d9e | 138 | if (private != NULL) |
5260325f | 139 | break; |
a8666d84 | 140 | clear_pass(); |
065604bb | 141 | strlcpy(msg, "Bad passphrase, try again: ", sizeof msg); |
5260325f | 142 | } |
143 | } | |
aeaa3d9e | 144 | if (ssh_add_identity(ac, private, comment)) |
145 | fprintf(stderr, "Identity added: %s (%s)\n", filename, comment); | |
5260325f | 146 | else |
147 | fprintf(stderr, "Could not add identity: %s\n", filename); | |
aeaa3d9e | 148 | xfree(comment); |
a306f2dd | 149 | key_free(private); |
8efc0c15 | 150 | } |
151 | ||
983def13 | 152 | static void |
9ff6f66f | 153 | update_card(AuthenticationConnection *ac, int add, const char *id) |
983def13 | 154 | { |
155 | if (ssh_update_card(ac, add, id)) | |
9ff6f66f | 156 | fprintf(stderr, "Card %s: %s\n", |
983def13 | 157 | add ? "added" : "removed", id); |
158 | else | |
9ff6f66f | 159 | fprintf(stderr, "Could not %s card: %s\n", |
983def13 | 160 | add ? "add" : "remove", id); |
161 | } | |
162 | ||
396c147e | 163 | static void |
22138a36 | 164 | list_identities(AuthenticationConnection *ac, int do_fp) |
8efc0c15 | 165 | { |
2e73a022 | 166 | Key *key; |
22138a36 | 167 | char *comment, *fp; |
2e73a022 | 168 | int had_identities = 0; |
169 | int version; | |
170 | ||
171 | for (version = 1; version <= 2; version++) { | |
172 | for (key = ssh_get_first_identity(ac, &comment, version); | |
173 | key != NULL; | |
174 | key = ssh_get_next_identity(ac, &comment, version)) { | |
175 | had_identities = 1; | |
22138a36 | 176 | if (do_fp) { |
177 | fp = key_fingerprint(key, SSH_FP_MD5, | |
178 | SSH_FP_HEX); | |
fa08c86b | 179 | printf("%d %s %s (%s)\n", |
22138a36 | 180 | key_size(key), fp, comment, key_type(key)); |
181 | xfree(fp); | |
5260325f | 182 | } else { |
2e73a022 | 183 | if (!key_write(key, stdout)) |
184 | fprintf(stderr, "key_write failed"); | |
185 | fprintf(stdout, " %s\n", comment); | |
5260325f | 186 | } |
2e73a022 | 187 | key_free(key); |
188 | xfree(comment); | |
5260325f | 189 | } |
f095fcc7 | 190 | } |
5260325f | 191 | if (!had_identities) |
192 | printf("The agent has no identities.\n"); | |
8efc0c15 | 193 | } |
194 | ||
983def13 | 195 | static void |
196 | usage(void) | |
197 | { | |
198 | printf("Usage: ssh-add [options]\n"); | |
199 | printf(" -l, -L : list identities\n"); | |
200 | printf(" -d : delete identity\n"); | |
201 | printf(" -D : delete all identities\n"); | |
202 | printf(" -s reader_num : add key in the smartcard in reader_num.\n"); | |
203 | printf(" -e reader_num : remove key in the smartcard in reader_num.\n"); | |
983def13 | 204 | } |
205 | ||
8efc0c15 | 206 | int |
5068f573 | 207 | main(int argc, char **argv) |
8efc0c15 | 208 | { |
34e02b83 | 209 | extern char *optarg; |
210 | extern int optind; | |
5260325f | 211 | AuthenticationConnection *ac = NULL; |
212 | struct passwd *pw; | |
213 | char buf[1024]; | |
9ff6f66f | 214 | char *sc_reader_id = NULL; |
215 | int i, ch, deleting = 0; | |
5260325f | 216 | |
260d427b | 217 | __progname = get_progname(argv[0]); |
264dce47 | 218 | init_rng(); |
044b0662 | 219 | seed_rng(); |
264dce47 | 220 | |
2b87da3b | 221 | SSLeay_add_all_algorithms(); |
2e73a022 | 222 | |
5260325f | 223 | /* At first, get a connection to the authentication agent. */ |
224 | ac = ssh_get_authentication_connection(); | |
225 | if (ac == NULL) { | |
226 | fprintf(stderr, "Could not open a connection to your authentication agent.\n"); | |
227 | exit(1); | |
8efc0c15 | 228 | } |
34e02b83 | 229 | while ((ch = getopt(argc, argv, "lLdDe:s:")) != -1) { |
230 | switch (ch) { | |
231 | case 'l': | |
232 | case 'L': | |
233 | list_identities(ac, ch == 'l' ? 1 : 0); | |
234 | goto done; | |
235 | break; | |
236 | case 'd': | |
5260325f | 237 | deleting = 1; |
34e02b83 | 238 | break; |
239 | case 'D': | |
5260325f | 240 | delete_all(ac); |
34e02b83 | 241 | goto done; |
242 | break; | |
243 | case 's': | |
9ff6f66f | 244 | sc_reader_id = optarg; |
34e02b83 | 245 | break; |
246 | case 'e': | |
983def13 | 247 | deleting = 1; |
9ff6f66f | 248 | sc_reader_id = optarg; |
34e02b83 | 249 | break; |
250 | default: | |
251 | usage(); | |
252 | exit(1); | |
253 | break; | |
983def13 | 254 | } |
8efc0c15 | 255 | } |
34e02b83 | 256 | argc -= optind; |
257 | argv += optind; | |
9ff6f66f | 258 | if (sc_reader_id != NULL) { |
259 | update_card(ac, !deleting, sc_reader_id); | |
34e02b83 | 260 | goto done; |
983def13 | 261 | } |
34e02b83 | 262 | if (argc == 0) { |
5260325f | 263 | pw = getpwuid(getuid()); |
264 | if (!pw) { | |
14a9a859 | 265 | fprintf(stderr, "No user found with uid %u\n", |
266 | (u_int)getuid()); | |
5260325f | 267 | ssh_close_authentication_connection(ac); |
268 | exit(1); | |
269 | } | |
42f11eb2 | 270 | snprintf(buf, sizeof buf, "%s/%s", pw->pw_dir, _PATH_SSH_CLIENT_IDENTITY); |
5260325f | 271 | if (deleting) |
272 | delete_file(ac, buf); | |
273 | else | |
274 | add_file(ac, buf); | |
34e02b83 | 275 | } else { |
276 | for (i = 0; i < argc; i++) { | |
277 | if (deleting) | |
278 | delete_file(ac, argv[i]); | |
279 | else | |
280 | add_file(ac, argv[i]); | |
281 | } | |
8efc0c15 | 282 | } |
a8666d84 | 283 | clear_pass(); |
34e02b83 | 284 | |
285 | done: | |
5260325f | 286 | ssh_close_authentication_connection(ac); |
287 | exit(0); | |
8efc0c15 | 288 | } |