1 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
4 This file is part of systemd.
6 Copyright 2010 Lennart Poettering
8 systemd is free software; you can redistribute it and/or modify it
9 under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2 of the License, or
11 (at your option) any later version.
13 systemd is distributed in the hope that it will be useful, but
14 WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with systemd; If not, see <http://www.gnu.org/licenses/>.
25 #include <libcryptsetup.h>
29 #include "ask-password-api.h"
31 static const char *opt_type = NULL; /* LUKS1 or PLAIN */
32 static char *opt_cipher = NULL;
33 static unsigned opt_key_size = 0;
34 static char *opt_hash = NULL;
35 static unsigned opt_tries = 0;
36 static bool opt_readonly = false;
37 static bool opt_verify = false;
38 static usec_t opt_timeout = 0;
40 /* Options Debian's crypttab knows we don't:
52 static int parse_one_option(const char *option) {
55 /* Handled outside of this tool */
56 if (streq(option, "noauto"))
59 if (startswith(option, "cipher=")) {
62 if (!(t = strdup(option+7)))
68 } else if (startswith(option, "size=")) {
70 if (safe_atou(option+5, &opt_key_size) < 0) {
71 log_error("size= parse failure, ignoring.");
75 } else if (startswith(option, "hash=")) {
78 if (!(t = strdup(option+5)))
84 } else if (startswith(option, "tries=")) {
86 if (safe_atou(option+6, &opt_tries) < 0) {
87 log_error("tries= parse failure, ignoring.");
91 } else if (streq(option, "readonly"))
93 else if (streq(option, "verify"))
95 else if (streq(option, "luks"))
96 opt_type = CRYPT_LUKS1;
97 else if (streq(option, "plain") ||
98 streq(option, "swap") ||
100 opt_type = CRYPT_PLAIN;
101 else if (startswith(option, "timeout=")) {
103 if (parse_usec(option+8, &opt_timeout) < 0) {
104 log_error("timeout= parse failure, ignoring.");
109 log_error("Encountered unknown /etc/crypttab option '%s', ignoring.", option);
114 static int parse_options(const char *options) {
121 FOREACH_WORD_SEPARATOR(w, l, options, ",", state) {
125 if (!(o = strndup(w, l)))
128 r = parse_one_option(o);
138 static void log_glue(int level, const char *msg, void *usrptr) {
139 log_debug("%s", msg);
142 int main(int argc, char *argv[]) {
143 int r = EXIT_FAILURE;
144 struct crypt_device *cd = NULL;
145 char *password = NULL, *truncated_cipher = NULL;
146 const char *cipher = NULL, *cipher_mode = NULL, *hash = NULL;
149 log_error("This program requires at least two arguments.");
153 log_set_target(LOG_TARGET_AUTO);
154 log_parse_environment();
157 if (streq(argv[1], "attach")) {
161 const char *key_file = NULL;
163 crypt_status_info status;
166 log_error("attach requires at least two arguments.");
172 !streq(argv[4], "-") &&
173 !streq(argv[4], "none")) {
175 if (!path_is_absolute(argv[4]))
176 log_error("Password file path %s is not absolute. Ignoring.", argv[4]);
181 if (argc >= 6 && argv[5][0] && !streq(argv[5], "-"))
182 parse_options(argv[5]);
184 if ((k = crypt_init(&cd, argv[3]))) {
185 log_error("crypt_init() failed: %s", strerror(-k));
189 crypt_set_log_callback(cd, log_glue, NULL);
191 status = crypt_status(cd, argv[2]);
192 if (status == CRYPT_ACTIVE || status == CRYPT_BUSY) {
193 log_info("Volume %s already active.", argv[2]);
199 flags |= CRYPT_ACTIVATE_READONLY;
201 until = now(CLOCK_MONOTONIC) + (opt_timeout > 0 ? opt_timeout : 60 * USEC_PER_SEC);
203 opt_tries = opt_tries > 0 ? opt_tries : 3;
204 opt_key_size = (opt_key_size > 0 ? opt_key_size : 256);
205 hash = opt_hash ? opt_hash : "ripemd160";
210 l = strcspn(opt_cipher, "-");
212 if (!(truncated_cipher = strndup(opt_cipher, l))) {
213 log_error("Out of memory");
217 cipher = truncated_cipher;
218 cipher_mode = opt_cipher[l] ? opt_cipher+l+1 : "plain";
221 cipher_mode = "cbc-essiv:sha256";
224 for (try = 0; try < opt_tries; try++) {
225 bool pass_volume_key = false;
232 if ((k = ask_password_auto("Please enter passphrase for disk:", "drive-harddisk", until, &password)) < 0) {
233 log_error("Failed to query password: %s", strerror(-k));
238 char *password2 = NULL;
240 if ((k = ask_password_auto("Please enter passphrase for disk (verification):", "drive-harddisk", until, &password2)) < 0) {
241 log_error("Failed to query verification password: %s", strerror(-k));
245 if (!streq(password, password2)) {
246 log_warning("Passwords did not match, retrying.");
254 if (strlen(password)+1 < opt_key_size) {
257 /* Pad password if necessary */
259 if (!(c = new(char, opt_key_size))) {
260 log_error("Out of memory.");
264 strncpy(c, password, opt_key_size);
270 if (!opt_type || streq(opt_type, CRYPT_LUKS1))
271 k = crypt_load(cd, CRYPT_LUKS1, NULL);
273 if ((!opt_type && k < 0) || streq_ptr(opt_type, CRYPT_PLAIN)) {
274 struct crypt_params_plain params;
279 /* In contrast to what the name
280 * crypt_setup() might suggest this
281 * doesn't actually format anything,
282 * it just configures encryption
283 * parameters when used for plain
285 k = crypt_format(cd, CRYPT_PLAIN,
293 pass_volume_key = streq(hash, "plain");
297 log_error("Loading of cryptographic parameters failed: %s", strerror(-k));
301 log_info("Set cipher %s, mode %s, key size %i bits for device %s.",
302 crypt_get_cipher(cd),
303 crypt_get_cipher_mode(cd),
304 crypt_get_volume_key_size(cd)*8,
308 k = crypt_activate_by_keyfile(cd, argv[2], CRYPT_ANY_SLOT, key_file, opt_key_size, flags);
309 else if (pass_volume_key)
310 k = crypt_activate_by_volume_key(cd, argv[2], password, opt_key_size, flags);
312 k = crypt_activate_by_passphrase(cd, argv[2], CRYPT_ANY_SLOT, password, strlen(password), flags);
318 log_error("Failed to activate: %s", strerror(-k));
322 log_warning("Invalid passphrase.");
325 if (try >= opt_tries) {
326 log_error("Too many attempts.");
330 } else if (streq(argv[1], "detach")) {
333 if ((k = crypt_init_by_name(&cd, argv[2]))) {
334 log_error("crypt_init() failed: %s", strerror(-k));
338 crypt_set_log_callback(cd, log_glue, NULL);
340 if ((k = crypt_deactivate(cd, argv[2])) < 0) {
341 log_error("Failed to deactivate: %s", strerror(-k));
346 log_error("Unknown verb %s.", argv[1]);
360 free(truncated_cipher);