/* * Author: Tatu Ylonen * Copyright (c) 1995 Tatu Ylonen , 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("$FreeBSD$"); RCSID("$OpenBSD: ssh-add.c,v 1.36 2001/04/18 21:57:42 markus Exp $"); #include #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" /* we keep a cache of one passphrases */ static char *pass = NULL; void clear_pass(void) { if (pass) { memset(pass, 0, strlen(pass)); xfree(pass); pass = NULL; } } 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. */ 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"); } 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(); printf("Need passphrase for %.200s\n", filename); 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); } 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; 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); }