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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, |
14 | * Copyright (c) 2000 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" | |
b5c334cc | 38 | RCSID("$OpenBSD: ssh-add.c,v 1.24 2001/01/13 18:14:13 markus Exp $"); |
8efc0c15 | 39 | |
2e73a022 | 40 | #include <openssl/evp.h> |
a306f2dd | 41 | #include <openssl/rsa.h> |
42 | #include <openssl/dsa.h> | |
43 | ||
8efc0c15 | 44 | #include "rsa.h" |
45 | #include "ssh.h" | |
46 | #include "xmalloc.h" | |
a306f2dd | 47 | #include "key.h" |
4c8722d9 | 48 | #include "authfd.h" |
a306f2dd | 49 | #include "authfile.h" |
8efc0c15 | 50 | |
f601d847 | 51 | #ifdef HAVE___PROGNAME |
52 | extern char *__progname; | |
260d427b | 53 | #else |
54 | char *__progname; | |
55 | #endif | |
f601d847 | 56 | |
8efc0c15 | 57 | void |
5068f573 | 58 | delete_file(AuthenticationConnection *ac, const char *filename) |
8efc0c15 | 59 | { |
a306f2dd | 60 | Key *public; |
5260325f | 61 | char *comment; |
62 | ||
fa08c86b | 63 | public = key_new(KEY_RSA1); |
a306f2dd | 64 | if (!load_public_key(filename, public, &comment)) { |
bcbf86ec | 65 | key_free(public); |
fa08c86b | 66 | public = key_new(KEY_UNSPEC); |
bcbf86ec | 67 | if (!try_load_public_key(filename, public, &comment)) { |
68 | printf("Bad key file %s\n", filename); | |
69 | return; | |
70 | } | |
5260325f | 71 | } |
2e73a022 | 72 | if (ssh_remove_identity(ac, public)) |
5260325f | 73 | fprintf(stderr, "Identity removed: %s (%s)\n", filename, comment); |
74 | else | |
75 | fprintf(stderr, "Could not remove identity: %s\n", filename); | |
a306f2dd | 76 | key_free(public); |
5260325f | 77 | xfree(comment); |
8efc0c15 | 78 | } |
79 | ||
2e73a022 | 80 | /* Send a request to remove all identities. */ |
8efc0c15 | 81 | void |
5068f573 | 82 | delete_all(AuthenticationConnection *ac) |
8efc0c15 | 83 | { |
2e73a022 | 84 | int success = 1; |
85 | ||
86 | if (!ssh_remove_all_identities(ac, 1)) | |
87 | success = 0; | |
88 | /* ignore error-code for ssh2 */ | |
89 | ssh_remove_all_identities(ac, 2); | |
90 | ||
91 | if (success) | |
5260325f | 92 | fprintf(stderr, "All identities removed.\n"); |
93 | else | |
b5c334cc | 94 | fprintf(stderr, "Failed to remove all identities.\n"); |
8efc0c15 | 95 | } |
96 | ||
aa3378df | 97 | char * |
98 | ssh_askpass(char *askpass, char *msg) | |
99 | { | |
100 | pid_t pid; | |
101 | size_t len; | |
102 | char *nl, *pass; | |
103 | int p[2], status; | |
104 | char buf[1024]; | |
105 | ||
106 | if (askpass == NULL) | |
107 | fatal("internal error: askpass undefined"); | |
108 | if (pipe(p) < 0) | |
109 | fatal("ssh_askpass: pipe: %s", strerror(errno)); | |
110 | if ((pid = fork()) < 0) | |
111 | fatal("ssh_askpass: fork: %s", strerror(errno)); | |
112 | if (pid == 0) { | |
113 | close(p[0]); | |
114 | if (dup2(p[1], STDOUT_FILENO) < 0) | |
115 | fatal("ssh_askpass: dup2: %s", strerror(errno)); | |
116 | execlp(askpass, askpass, msg, (char *) 0); | |
117 | fatal("ssh_askpass: exec(%s): %s", askpass, strerror(errno)); | |
118 | } | |
119 | close(p[1]); | |
ba7a3f40 | 120 | buf[0] = '\0'; |
121 | atomicio(read, p[0], buf, sizeof buf); | |
122 | len = strlen(buf); | |
aa3378df | 123 | close(p[0]); |
124 | while (waitpid(pid, &status, 0) < 0) | |
125 | if (errno != EINTR) | |
126 | break; | |
127 | if (len <= 1) | |
128 | return xstrdup(""); | |
129 | nl = strchr(buf, '\n'); | |
130 | if (nl) | |
131 | *nl = '\0'; | |
132 | pass = xstrdup(buf); | |
133 | memset(buf, 0, sizeof(buf)); | |
134 | return pass; | |
135 | } | |
136 | ||
8efc0c15 | 137 | void |
5068f573 | 138 | add_file(AuthenticationConnection *ac, const char *filename) |
8efc0c15 | 139 | { |
2e73a022 | 140 | struct stat st; |
a306f2dd | 141 | Key *public; |
142 | Key *private; | |
aa3378df | 143 | char *saved_comment, *comment, *askpass = NULL; |
144 | char buf[1024], msg[1024]; | |
5260325f | 145 | int success; |
aa3378df | 146 | int interactive = isatty(STDIN_FILENO); |
fa08c86b | 147 | int type = KEY_RSA1; |
5260325f | 148 | |
2e73a022 | 149 | if (stat(filename, &st) < 0) { |
150 | perror(filename); | |
151 | exit(1); | |
152 | } | |
4c8722d9 | 153 | /* |
154 | * try to load the public key. right now this only works for RSA, | |
155 | * since DSA keys are fully encrypted | |
156 | */ | |
fa08c86b | 157 | public = key_new(KEY_RSA1); |
a306f2dd | 158 | if (!load_public_key(filename, public, &saved_comment)) { |
fa08c86b | 159 | /* ok, so we will assume this is 'some' key */ |
160 | type = KEY_UNSPEC; | |
4c8722d9 | 161 | saved_comment = xstrdup(filename); |
5260325f | 162 | } |
a306f2dd | 163 | key_free(public); |
dad9a31e | 164 | |
57112b5a | 165 | if (!interactive && getenv("DISPLAY")) { |
166 | if (getenv(SSH_ASKPASS_ENV)) | |
167 | askpass = getenv(SSH_ASKPASS_ENV); | |
168 | else | |
169 | askpass = SSH_ASKPASS_DEFAULT; | |
170 | } | |
aa3378df | 171 | |
5260325f | 172 | /* At first, try empty passphrase */ |
4c8722d9 | 173 | private = key_new(type); |
a306f2dd | 174 | success = load_private_key(filename, "", private, &comment); |
5260325f | 175 | if (!success) { |
aa3378df | 176 | printf("Need passphrase for %.200s\n", filename); |
177 | if (!interactive && askpass == NULL) { | |
178 | xfree(saved_comment); | |
179 | return; | |
5260325f | 180 | } |
aa3378df | 181 | snprintf(msg, sizeof msg, "Enter passphrase for %.200s", saved_comment); |
182 | for (;;) { | |
183 | char *pass; | |
184 | if (interactive) { | |
185 | snprintf(buf, sizeof buf, "%s: ", msg); | |
186 | pass = read_passphrase(buf, 1); | |
187 | } else { | |
188 | pass = ssh_askpass(askpass, msg); | |
189 | } | |
5260325f | 190 | if (strcmp(pass, "") == 0) { |
191 | xfree(pass); | |
192 | xfree(saved_comment); | |
193 | return; | |
194 | } | |
a306f2dd | 195 | success = load_private_key(filename, pass, private, &comment); |
5260325f | 196 | memset(pass, 0, strlen(pass)); |
197 | xfree(pass); | |
198 | if (success) | |
199 | break; | |
aa3378df | 200 | strlcpy(msg, "Bad passphrase, try again", sizeof msg); |
5260325f | 201 | } |
202 | } | |
2e73a022 | 203 | xfree(comment); |
204 | if (ssh_add_identity(ac, private, saved_comment)) | |
205 | fprintf(stderr, "Identity added: %s (%s)\n", filename, saved_comment); | |
5260325f | 206 | else |
207 | fprintf(stderr, "Could not add identity: %s\n", filename); | |
a306f2dd | 208 | key_free(private); |
2e73a022 | 209 | xfree(saved_comment); |
8efc0c15 | 210 | } |
211 | ||
212 | void | |
f095fcc7 | 213 | list_identities(AuthenticationConnection *ac, int fp) |
8efc0c15 | 214 | { |
2e73a022 | 215 | Key *key; |
5260325f | 216 | char *comment; |
2e73a022 | 217 | int had_identities = 0; |
218 | int version; | |
219 | ||
220 | for (version = 1; version <= 2; version++) { | |
221 | for (key = ssh_get_first_identity(ac, &comment, version); | |
222 | key != NULL; | |
223 | key = ssh_get_next_identity(ac, &comment, version)) { | |
224 | had_identities = 1; | |
225 | if (fp) { | |
fa08c86b | 226 | printf("%d %s %s (%s)\n", |
227 | key_size(key), key_fingerprint(key), | |
228 | comment, key_type(key)); | |
5260325f | 229 | } else { |
2e73a022 | 230 | if (!key_write(key, stdout)) |
231 | fprintf(stderr, "key_write failed"); | |
232 | fprintf(stdout, " %s\n", comment); | |
5260325f | 233 | } |
2e73a022 | 234 | key_free(key); |
235 | xfree(comment); | |
5260325f | 236 | } |
f095fcc7 | 237 | } |
5260325f | 238 | if (!had_identities) |
239 | printf("The agent has no identities.\n"); | |
8efc0c15 | 240 | } |
241 | ||
242 | int | |
5068f573 | 243 | main(int argc, char **argv) |
8efc0c15 | 244 | { |
5260325f | 245 | AuthenticationConnection *ac = NULL; |
246 | struct passwd *pw; | |
247 | char buf[1024]; | |
248 | int no_files = 1; | |
249 | int i; | |
250 | int deleting = 0; | |
251 | ||
260d427b | 252 | __progname = get_progname(argv[0]); |
264dce47 | 253 | init_rng(); |
254 | ||
2e73a022 | 255 | SSLeay_add_all_algorithms(); |
256 | ||
5260325f | 257 | /* At first, get a connection to the authentication agent. */ |
258 | ac = ssh_get_authentication_connection(); | |
259 | if (ac == NULL) { | |
260 | fprintf(stderr, "Could not open a connection to your authentication agent.\n"); | |
261 | exit(1); | |
8efc0c15 | 262 | } |
5260325f | 263 | for (i = 1; i < argc; i++) { |
264 | if ((strcmp(argv[i], "-l") == 0) || | |
265 | (strcmp(argv[i], "-L") == 0)) { | |
266 | list_identities(ac, argv[i][1] == 'l' ? 1 : 0); | |
267 | /* Don't default-add/delete if -l. */ | |
268 | no_files = 0; | |
269 | continue; | |
270 | } | |
271 | if (strcmp(argv[i], "-d") == 0) { | |
272 | deleting = 1; | |
273 | continue; | |
274 | } | |
275 | if (strcmp(argv[i], "-D") == 0) { | |
276 | delete_all(ac); | |
277 | no_files = 0; | |
278 | continue; | |
279 | } | |
280 | no_files = 0; | |
281 | if (deleting) | |
282 | delete_file(ac, argv[i]); | |
283 | else | |
284 | add_file(ac, argv[i]); | |
8efc0c15 | 285 | } |
5260325f | 286 | if (no_files) { |
287 | pw = getpwuid(getuid()); | |
288 | if (!pw) { | |
14a9a859 | 289 | fprintf(stderr, "No user found with uid %u\n", |
290 | (u_int)getuid()); | |
5260325f | 291 | ssh_close_authentication_connection(ac); |
292 | exit(1); | |
293 | } | |
294 | snprintf(buf, sizeof buf, "%s/%s", pw->pw_dir, SSH_CLIENT_IDENTITY); | |
295 | if (deleting) | |
296 | delete_file(ac, buf); | |
297 | else | |
298 | add_file(ac, buf); | |
8efc0c15 | 299 | } |
5260325f | 300 | ssh_close_authentication_connection(ac); |
301 | exit(0); | |
8efc0c15 | 302 | } |