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 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 1.35 2001/04/14 16:27:57 markus Exp $");
40 #include <openssl/evp.h>
49 #include "pathnames.h"
52 #ifdef HAVE___PROGNAME
53 extern char *__progname;
58 /* we keep a cache of one passphrases */
59 static char *pass = NULL;
64 memset(pass, 0, strlen(pass));
71 delete_file(AuthenticationConnection *ac, const char *filename)
76 public = key_load_public(filename, &comment);
78 printf("Bad key file %s\n", filename);
81 if (ssh_remove_identity(ac, public))
82 fprintf(stderr, "Identity removed: %s (%s)\n", filename, comment);
84 fprintf(stderr, "Could not remove identity: %s\n", filename);
89 /* Send a request to remove all identities. */
91 delete_all(AuthenticationConnection *ac)
95 if (!ssh_remove_all_identities(ac, 1))
97 /* ignore error-code for ssh2 */
98 ssh_remove_all_identities(ac, 2);
101 fprintf(stderr, "All identities removed.\n");
103 fprintf(stderr, "Failed to remove all identities.\n");
107 ssh_askpass(char *askpass, char *msg)
115 if (fflush(stdout) != 0)
116 error("ssh_askpass: fflush: %s", strerror(errno));
118 fatal("internal error: askpass undefined");
120 fatal("ssh_askpass: pipe: %s", strerror(errno));
121 if ((pid = fork()) < 0)
122 fatal("ssh_askpass: fork: %s", strerror(errno));
125 if (dup2(p[1], STDOUT_FILENO) < 0)
126 fatal("ssh_askpass: dup2: %s", strerror(errno));
127 execlp(askpass, askpass, msg, (char *) 0);
128 fatal("ssh_askpass: exec(%s): %s", askpass, strerror(errno));
131 len = read(p[0], buf, sizeof buf);
133 while (waitpid(pid, &status, 0) < 0)
138 nl = strchr(buf, '\n');
142 memset(buf, 0, sizeof(buf));
147 add_file(AuthenticationConnection *ac, const char *filename)
151 char *comment = NULL, *askpass = NULL;
152 char buf[1024], msg[1024];
153 int interactive = isatty(STDIN_FILENO);
155 if (stat(filename, &st) < 0) {
159 if (!interactive && getenv("DISPLAY")) {
160 if (getenv(SSH_ASKPASS_ENV))
161 askpass = getenv(SSH_ASKPASS_ENV);
163 askpass = _PATH_SSH_ASKPASS_DEFAULT;
166 /* At first, try empty passphrase */
167 private = key_load_private(filename, "", &comment);
169 comment = xstrdup(filename);
171 if (private == NULL && pass != NULL)
172 private = key_load_private(filename, pass, NULL);
173 if (private == NULL) {
174 /* clear passphrase since it did not work */
176 printf("Need passphrase for %.200s\n", filename);
177 if (!interactive && askpass == NULL) {
181 snprintf(msg, sizeof msg, "Enter passphrase for %.200s", comment);
184 snprintf(buf, sizeof buf, "%s: ", msg);
185 pass = read_passphrase(buf, 1);
187 pass = ssh_askpass(askpass, msg);
189 if (strcmp(pass, "") == 0) {
194 private = key_load_private(filename, pass, &comment);
198 strlcpy(msg, "Bad passphrase, try again", sizeof msg);
201 if (ssh_add_identity(ac, private, comment))
202 fprintf(stderr, "Identity added: %s (%s)\n", filename, comment);
204 fprintf(stderr, "Could not add identity: %s\n", filename);
210 list_identities(AuthenticationConnection *ac, int do_fp)
214 int had_identities = 0;
217 for (version = 1; version <= 2; version++) {
218 for (key = ssh_get_first_identity(ac, &comment, version);
220 key = ssh_get_next_identity(ac, &comment, version)) {
223 fp = key_fingerprint(key, SSH_FP_MD5,
225 printf("%d %s %s (%s)\n",
226 key_size(key), fp, comment, key_type(key));
229 if (!key_write(key, stdout))
230 fprintf(stderr, "key_write failed");
231 fprintf(stdout, " %s\n", comment);
238 printf("The agent has no identities.\n");
242 main(int argc, char **argv)
244 AuthenticationConnection *ac = NULL;
251 __progname = get_progname(argv[0]);
254 SSLeay_add_all_algorithms();
256 /* At first, get a connection to the authentication agent. */
257 ac = ssh_get_authentication_connection();
259 fprintf(stderr, "Could not open a connection to your authentication agent.\n");
262 for (i = 1; i < argc; i++) {
263 if ((strcmp(argv[i], "-l") == 0) ||
264 (strcmp(argv[i], "-L") == 0)) {
265 list_identities(ac, argv[i][1] == 'l' ? 1 : 0);
266 /* Don't default-add/delete if -l. */
270 if (strcmp(argv[i], "-d") == 0) {
274 if (strcmp(argv[i], "-D") == 0) {
281 delete_file(ac, argv[i]);
283 add_file(ac, argv[i]);
286 pw = getpwuid(getuid());
288 fprintf(stderr, "No user found with uid %u\n",
290 ssh_close_authentication_connection(ac);
293 snprintf(buf, sizeof buf, "%s/%s", pw->pw_dir, _PATH_SSH_CLIENT_IDENTITY);
295 delete_file(ac, buf);
300 ssh_close_authentication_connection(ac);