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/>.
26 #include <libcryptsetup.h>
31 #include "ask-password-api.h"
33 static const char *opt_type = NULL; /* LUKS1 or PLAIN */
34 static char *opt_cipher = NULL;
35 static unsigned opt_key_size = 0;
36 static char *opt_hash = NULL;
37 static unsigned opt_tries = 0;
38 static bool opt_readonly = false;
39 static bool opt_verify = false;
40 static usec_t opt_timeout = 0;
42 /* Options Debian's crypttab knows we don't:
54 static int parse_one_option(const char *option) {
57 /* Handled outside of this tool */
58 if (streq(option, "noauto"))
61 if (startswith(option, "cipher=")) {
64 if (!(t = strdup(option+7)))
70 } else if (startswith(option, "size=")) {
72 if (safe_atou(option+5, &opt_key_size) < 0) {
73 log_error("size= parse failure, ignoring.");
77 } else if (startswith(option, "hash=")) {
80 if (!(t = strdup(option+5)))
86 } else if (startswith(option, "tries=")) {
88 if (safe_atou(option+6, &opt_tries) < 0) {
89 log_error("tries= parse failure, ignoring.");
93 } else if (streq(option, "readonly"))
95 else if (streq(option, "verify"))
97 else if (streq(option, "luks"))
98 opt_type = CRYPT_LUKS1;
99 else if (streq(option, "plain") ||
100 streq(option, "swap") ||
101 streq(option, "tmp"))
102 opt_type = CRYPT_PLAIN;
103 else if (startswith(option, "timeout=")) {
105 if (parse_usec(option+8, &opt_timeout) < 0) {
106 log_error("timeout= parse failure, ignoring.");
111 log_error("Encountered unknown /etc/crypttab option '%s', ignoring.", option);
116 static int parse_options(const char *options) {
123 FOREACH_WORD_SEPARATOR(w, l, options, ",", state) {
127 if (!(o = strndup(w, l)))
130 r = parse_one_option(o);
140 static void log_glue(int level, const char *msg, void *usrptr) {
141 log_debug("%s", msg);
144 static char *disk_description(const char *path) {
145 struct udev *udev = NULL;
146 struct udev_device *device = NULL;
148 char *description = NULL;
153 if (stat(path, &st) < 0)
156 if (!S_ISBLK(st.st_mode))
159 if (!(udev = udev_new()))
162 if (!(device = udev_device_new_from_devnum(udev, 'b', st.st_rdev)))
165 if ((model = udev_device_get_property_value(device, "ID_MODEL_FROM_DATABASE")) ||
166 (model = udev_device_get_property_value(device, "ID_MODEL")))
167 description = strdup(model);
171 udev_device_unref(device);
179 int main(int argc, char *argv[]) {
180 int r = EXIT_FAILURE;
181 struct crypt_device *cd = NULL;
182 char *password = NULL, *truncated_cipher = NULL;
183 const char *cipher = NULL, *cipher_mode = NULL, *hash = NULL, *name = NULL;
184 char *description = NULL;
187 log_error("This program requires at least two arguments.");
191 log_set_target(LOG_TARGET_AUTO);
192 log_parse_environment();
195 if (streq(argv[1], "attach")) {
199 const char *key_file = NULL;
201 crypt_status_info status;
204 log_error("attach requires at least two arguments.");
210 !streq(argv[4], "-") &&
211 !streq(argv[4], "none")) {
213 if (!path_is_absolute(argv[4]))
214 log_error("Password file path %s is not absolute. Ignoring.", argv[4]);
219 if (argc >= 6 && argv[5][0] && !streq(argv[5], "-"))
220 parse_options(argv[5]);
222 /* A delicious drop of snake oil */
223 mlockall(MCL_FUTURE);
225 description = disk_description(argv[3]);
226 name = description ? description : argv[2];
228 if ((k = crypt_init(&cd, argv[3]))) {
229 log_error("crypt_init() failed: %s", strerror(-k));
233 crypt_set_log_callback(cd, log_glue, NULL);
235 status = crypt_status(cd, argv[2]);
236 if (status == CRYPT_ACTIVE || status == CRYPT_BUSY) {
237 log_info("Volume %s already active.", argv[2]);
243 flags |= CRYPT_ACTIVATE_READONLY;
245 until = now(CLOCK_MONOTONIC) + (opt_timeout > 0 ? opt_timeout : 60 * USEC_PER_SEC);
247 opt_tries = opt_tries > 0 ? opt_tries : 3;
248 opt_key_size = (opt_key_size > 0 ? opt_key_size : 256);
249 hash = opt_hash ? opt_hash : "ripemd160";
254 l = strcspn(opt_cipher, "-");
256 if (!(truncated_cipher = strndup(opt_cipher, l))) {
257 log_error("Out of memory");
261 cipher = truncated_cipher;
262 cipher_mode = opt_cipher[l] ? opt_cipher+l+1 : "plain";
265 cipher_mode = "cbc-essiv:sha256";
268 for (try = 0; try < opt_tries; try++) {
269 bool pass_volume_key = false;
277 if (asprintf(&text, "Please enter passphrase for disk %s!", name) < 0) {
278 log_error("Out of memory");
282 k = ask_password_auto(text, "drive-harddisk", until, &password);
286 log_error("Failed to query password: %s", strerror(-k));
291 char *password2 = NULL;
293 if (asprintf(&text, "Please enter passphrase for disk %s! (verification)", name) < 0) {
294 log_error("Out of memory");
298 k = ask_password_auto(text, "drive-harddisk", until, &password2);
302 log_error("Failed to query verification password: %s", strerror(-k));
306 if (!streq(password, password2)) {
307 log_warning("Passwords did not match, retrying.");
315 if (strlen(password)+1 < opt_key_size) {
318 /* Pad password if necessary */
320 if (!(c = new(char, opt_key_size))) {
321 log_error("Out of memory.");
325 strncpy(c, password, opt_key_size);
331 if (!opt_type || streq(opt_type, CRYPT_LUKS1))
332 k = crypt_load(cd, CRYPT_LUKS1, NULL);
334 if ((!opt_type && k < 0) || streq_ptr(opt_type, CRYPT_PLAIN)) {
335 struct crypt_params_plain params;
340 /* In contrast to what the name
341 * crypt_setup() might suggest this
342 * doesn't actually format anything,
343 * it just configures encryption
344 * parameters when used for plain
346 k = crypt_format(cd, CRYPT_PLAIN,
354 pass_volume_key = streq(hash, "plain");
358 log_error("Loading of cryptographic parameters failed: %s", strerror(-k));
362 log_info("Set cipher %s, mode %s, key size %i bits for device %s.",
363 crypt_get_cipher(cd),
364 crypt_get_cipher_mode(cd),
365 crypt_get_volume_key_size(cd)*8,
369 k = crypt_activate_by_keyfile(cd, argv[2], CRYPT_ANY_SLOT, key_file, opt_key_size, flags);
370 else if (pass_volume_key)
371 k = crypt_activate_by_volume_key(cd, argv[2], password, opt_key_size, flags);
373 k = crypt_activate_by_passphrase(cd, argv[2], CRYPT_ANY_SLOT, password, strlen(password), flags);
379 log_error("Failed to activate: %s", strerror(-k));
383 log_warning("Invalid passphrase.");
386 if (try >= opt_tries) {
387 log_error("Too many attempts.");
392 } else if (streq(argv[1], "detach")) {
395 if ((k = crypt_init_by_name(&cd, argv[2]))) {
396 log_error("crypt_init() failed: %s", strerror(-k));
400 crypt_set_log_callback(cd, log_glue, NULL);
402 if ((k = crypt_deactivate(cd, argv[2])) < 0) {
403 log_error("Failed to deactivate: %s", strerror(-k));
408 log_error("Unknown verb %s.", argv[1]);
422 free(truncated_cipher);