| /* |
| * Author: Tatu Ylonen <ylo@cs.hut.fi> |
| * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland |
| * All rights reserved |
| * Adds an identity to the authentication server, or removes an identity. |
| * |
| * As far as I am concerned, the code I have written for this software |
| * can be used freely for any purpose. Any derived versions of this |
| * software must be clearly marked as such, and if the derived work is |
| * incompatible with the protocol description in the RFC file, it must be |
| * called by a name other than "ssh" or "Secure Shell". |
| * |
| * SSH2 implementation, |
| * Copyright (c) 2000 Markus Friedl. All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
| * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
| * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
| * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
| * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
| * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| #include "includes.h" |
| RCSID("$OpenBSD: ssh-add.c,v 1.39 2001/06/23 15:12:20 itojun Exp $"); |
| |
| #include <openssl/evp.h> |
| |
| #include "ssh.h" |
| #include "rsa.h" |
| #include "log.h" |
| #include "xmalloc.h" |
| #include "key.h" |
| #include "authfd.h" |
| #include "authfile.h" |
| #include "pathnames.h" |
| #include "readpass.h" |
| |
| #ifdef HAVE___PROGNAME |
| extern char *__progname; |
| #else |
| char *__progname; |
| #endif |
| |
| /* we keep a cache of one passphrases */ |
| static char *pass = NULL; |
| static void |
| clear_pass(void) |
| { |
| if (pass) { |
| memset(pass, 0, strlen(pass)); |
| xfree(pass); |
| pass = NULL; |
| } |
| } |
| |
| static void |
| delete_file(AuthenticationConnection *ac, const char *filename) |
| { |
| Key *public; |
| char *comment = NULL; |
| |
| public = key_load_public(filename, &comment); |
| if (public == NULL) { |
| printf("Bad key file %s\n", filename); |
| return; |
| } |
| if (ssh_remove_identity(ac, public)) |
| fprintf(stderr, "Identity removed: %s (%s)\n", filename, comment); |
| else |
| fprintf(stderr, "Could not remove identity: %s\n", filename); |
| key_free(public); |
| xfree(comment); |
| } |
| |
| /* Send a request to remove all identities. */ |
| static void |
| delete_all(AuthenticationConnection *ac) |
| { |
| int success = 1; |
| |
| if (!ssh_remove_all_identities(ac, 1)) |
| success = 0; |
| /* ignore error-code for ssh2 */ |
| ssh_remove_all_identities(ac, 2); |
| |
| if (success) |
| fprintf(stderr, "All identities removed.\n"); |
| else |
| fprintf(stderr, "Failed to remove all identities.\n"); |
| } |
| |
| static void |
| add_file(AuthenticationConnection *ac, const char *filename) |
| { |
| struct stat st; |
| Key *private; |
| char *comment = NULL; |
| char msg[1024]; |
| |
| if (stat(filename, &st) < 0) { |
| perror(filename); |
| exit(1); |
| } |
| /* At first, try empty passphrase */ |
| private = key_load_private(filename, "", &comment); |
| if (comment == NULL) |
| comment = xstrdup(filename); |
| /* try last */ |
| if (private == NULL && pass != NULL) |
| private = key_load_private(filename, pass, NULL); |
| if (private == NULL) { |
| /* clear passphrase since it did not work */ |
| clear_pass(); |
| snprintf(msg, sizeof msg, "Enter passphrase for %.200s: ", |
| comment); |
| for (;;) { |
| pass = read_passphrase(msg, 1); |
| if (strcmp(pass, "") == 0) { |
| clear_pass(); |
| xfree(comment); |
| return; |
| } |
| private = key_load_private(filename, pass, &comment); |
| if (private != NULL) |
| break; |
| clear_pass(); |
| strlcpy(msg, "Bad passphrase, try again: ", sizeof msg); |
| } |
| } |
| if (ssh_add_identity(ac, private, comment)) |
| fprintf(stderr, "Identity added: %s (%s)\n", filename, comment); |
| else |
| fprintf(stderr, "Could not add identity: %s\n", filename); |
| xfree(comment); |
| key_free(private); |
| } |
| |
| static void |
| list_identities(AuthenticationConnection *ac, int do_fp) |
| { |
| Key *key; |
| char *comment, *fp; |
| int had_identities = 0; |
| int version; |
| |
| for (version = 1; version <= 2; version++) { |
| for (key = ssh_get_first_identity(ac, &comment, version); |
| key != NULL; |
| key = ssh_get_next_identity(ac, &comment, version)) { |
| had_identities = 1; |
| if (do_fp) { |
| fp = key_fingerprint(key, SSH_FP_MD5, |
| SSH_FP_HEX); |
| printf("%d %s %s (%s)\n", |
| key_size(key), fp, comment, key_type(key)); |
| xfree(fp); |
| } else { |
| if (!key_write(key, stdout)) |
| fprintf(stderr, "key_write failed"); |
| fprintf(stdout, " %s\n", comment); |
| } |
| key_free(key); |
| xfree(comment); |
| } |
| } |
| if (!had_identities) |
| printf("The agent has no identities.\n"); |
| } |
| |
| int |
| main(int argc, char **argv) |
| { |
| AuthenticationConnection *ac = NULL; |
| struct passwd *pw; |
| char buf[1024]; |
| int no_files = 1; |
| int i; |
| int deleting = 0; |
| |
| __progname = get_progname(argv[0]); |
| init_rng(); |
| seed_rng(); |
| |
| SSLeay_add_all_algorithms(); |
| |
| /* At first, get a connection to the authentication agent. */ |
| ac = ssh_get_authentication_connection(); |
| if (ac == NULL) { |
| fprintf(stderr, "Could not open a connection to your authentication agent.\n"); |
| exit(1); |
| } |
| for (i = 1; i < argc; i++) { |
| if ((strcmp(argv[i], "-l") == 0) || |
| (strcmp(argv[i], "-L") == 0)) { |
| list_identities(ac, argv[i][1] == 'l' ? 1 : 0); |
| /* Don't default-add/delete if -l. */ |
| no_files = 0; |
| continue; |
| } |
| if (strcmp(argv[i], "-d") == 0) { |
| deleting = 1; |
| continue; |
| } |
| if (strcmp(argv[i], "-D") == 0) { |
| delete_all(ac); |
| no_files = 0; |
| continue; |
| } |
| no_files = 0; |
| if (deleting) |
| delete_file(ac, argv[i]); |
| else |
| add_file(ac, argv[i]); |
| } |
| if (no_files) { |
| pw = getpwuid(getuid()); |
| if (!pw) { |
| fprintf(stderr, "No user found with uid %u\n", |
| (u_int)getuid()); |
| ssh_close_authentication_connection(ac); |
| exit(1); |
| } |
| snprintf(buf, sizeof buf, "%s/%s", pw->pw_dir, _PATH_SSH_CLIENT_IDENTITY); |
| if (deleting) |
| delete_file(ac, buf); |
| else |
| add_file(ac, buf); |
| } |
| clear_pass(); |
| ssh_close_authentication_connection(ac); |
| exit(0); |
| } |