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 char *opt_cipher_mode = NULL;
34 static unsigned opt_key_size = 0;
35 static char *opt_hash = NULL;
36 static unsigned opt_tries = 0;
37 static bool opt_readonly = false;
38 static bool opt_verify = false;
39 static usec_t opt_timeout = 0;
41 static int parse_one_option(const char *option) {
44 /* Handled outside of this tool */
45 if (streq(option, "noauto"))
48 if (startswith(option, "cipher=")) {
51 if (!(t = strdup(option+7)))
57 } else if (startswith(option, "size=")) {
59 if (safe_atou(option+5, &opt_key_size) < 0) {
60 log_error("size= parse failure, ignoring.");
64 } else if (startswith(option, "hash=")) {
67 if (!(t = strdup(option+5)))
73 } else if (startswith(option, "mode=")) {
76 if (!(t = strdup(option+5)))
79 free(opt_cipher_mode);
82 } else if (startswith(option, "tries=")) {
84 if (safe_atou(option+6, &opt_tries) < 0) {
85 log_error("tries= parse failure, ignoring.");
89 } else if (streq(option, "readonly"))
91 else if (streq(option, "verify"))
93 else if (streq(option, "luks"))
94 opt_type = CRYPT_LUKS1;
95 else if (streq(option, "plain") ||
96 streq(option, "swap") ||
98 opt_type = CRYPT_PLAIN;
99 else if (startswith(option, "timeout=")) {
101 if (parse_usec(option+8, &opt_timeout) < 0) {
102 log_error("timeout= parse failure, ignoring.");
107 log_error("Encountered unknown /etc/crypttab option '%s', ignoring.", option);
112 static int parse_options(const char *options) {
119 FOREACH_WORD_SEPARATOR(w, l, options, ",", state) {
123 if (!(o = strndup(w, l)))
126 r = parse_one_option(o);
136 static void log_glue(int level, const char *msg, void *usrptr) {
137 log_debug("%s", msg);
140 int main(int argc, char *argv[]) {
141 int r = EXIT_FAILURE;
142 struct crypt_device *cd = NULL;
143 char *password = NULL;
144 const char *cipher = NULL, *cipher_mode = NULL, *hash = NULL;
145 crypt_status_info status;
148 log_error("This program requires at least two arguments.");
152 log_set_target(LOG_TARGET_AUTO);
153 log_parse_environment();
156 if (streq(argv[1], "attach")) {
160 const char *key_file = NULL;
164 log_error("attach requires at least two arguments.");
168 if (argc >= 5 && argv[4][0] && !streq(argv[4], "-")) {
170 if (!path_is_absolute(argv[4]))
171 log_error("Password file path %s is not absolute. Ignoring.", argv[4]);
176 if (argc >= 6 && argv[5][0] && !streq(argv[5], "-"))
177 parse_options(argv[5]);
179 if ((k = crypt_init(&cd, argv[3]))) {
180 log_error("crypt_init() failed: %s", strerror(-k));
184 crypt_set_log_callback(cd, log_glue, NULL);
186 status = crypt_status(cd, argv[2]);
187 if (status == CRYPT_ACTIVE || status == CRYPT_BUSY) {
188 log_info("Volume %s already active.", argv[2]);
194 flags |= CRYPT_ACTIVATE_READONLY;
196 until = now(CLOCK_MONOTONIC) + (opt_timeout > 0 ? opt_timeout : 60 * USEC_PER_SEC);
198 opt_tries = opt_tries > 0 ? opt_tries : 3;
199 opt_key_size = (opt_key_size > 0 ? opt_key_size : 256);
200 cipher = opt_cipher ? opt_cipher : "aes";
201 cipher_mode = opt_cipher_mode ? opt_cipher_mode : "cbc-essiv:sha256";
202 hash = opt_hash ? opt_hash : "ripemd160";
204 for (try = 0; try < opt_tries; try++) {
205 bool pass_volume_key = false;
212 if ((k = ask_password_auto("Please enter passphrase for disk:", "drive-harddisk", until, &password)) < 0) {
213 log_error("Failed to query password: %s", strerror(-k));
218 char *password2 = NULL;
220 if ((k = ask_password_auto("Please enter passphrase for disk (verification):", "drive-harddisk", until, &password2)) < 0) {
221 log_error("Failed to query verification password: %s", strerror(-k));
225 if (!streq(password, password2)) {
226 log_warning("Passwords did not match, retrying.");
234 if (strlen(password)+1 < opt_key_size) {
237 /* Pad password if necessary */
239 if (!(c = new(char, opt_key_size))) {
240 log_error("Out of memory.");
244 strncpy(c, password, opt_key_size);
250 if (!opt_type || streq(opt_type, CRYPT_LUKS1))
251 k = crypt_load(cd, CRYPT_LUKS1, NULL);
253 if ((!opt_type && k < 0) || streq_ptr(opt_type, CRYPT_PLAIN)) {
254 struct crypt_params_plain params;
259 /* In contrast to what the name
260 * crypt_setup() might suggest this
261 * doesn't actually format anything,
262 * it just configures encryption
263 * parameters when used for plain
265 k = crypt_format(cd, CRYPT_PLAIN,
273 pass_volume_key = streq(hash, "plain");
277 log_error("Loading of cryptographic parameters failed: %s", strerror(-k));
281 log_info("Set cipher %s, mode %s, key size %i bits for device %s.",
282 crypt_get_cipher(cd),
283 crypt_get_cipher_mode(cd),
284 crypt_get_volume_key_size(cd)*8,
288 k = crypt_activate_by_keyfile(cd, argv[2], CRYPT_ANY_SLOT, key_file, opt_key_size, flags);
289 else if (pass_volume_key)
290 k = crypt_activate_by_volume_key(cd, argv[2], password, opt_key_size, flags);
292 k = crypt_activate_by_passphrase(cd, argv[2], CRYPT_ANY_SLOT, password, strlen(password), flags);
298 log_error("Failed to activate: %s", strerror(-k));
302 log_warning("Invalid passphrase.");
305 if (try >= opt_tries) {
306 log_error("Too many attempts.");
310 } else if (streq(argv[1], "detach")) {
313 if ((k = crypt_init_by_name(&cd, argv[2]))) {
314 log_error("crypt_init() failed: %s", strerror(-k));
318 crypt_set_log_callback(cd, log_glue, NULL);
320 if ((k = crypt_deactivate(cd, argv[2])) < 0) {
321 log_error("Failed to deactivate: %s", strerror(-k));
326 log_error("Unknown verb %s.", argv[1]);
338 free(opt_cipher_mode);