/* SPDX-License-Identifier: LGPL-2.1+ */
-/***
- This file is part of systemd.
-
- Copyright 2010 Lennart Poettering
-
- systemd is free software; you can redistribute it and/or modify it
- under the terms of the GNU Lesser General Public License as published by
- the Free Software Foundation; either version 2.1 of the License, or
- (at your option) any later version.
-
- systemd is distributed in the hope that it will be useful, but
- WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- Lesser General Public License for more details.
-
- You should have received a copy of the GNU Lesser General Public License
- along with systemd; If not, see <http://www.gnu.org/licenses/>.
-***/
#include <errno.h>
#include <mntent.h>
#include "escape.h"
#include "fileio.h"
#include "log.h"
+#include "main-func.h"
#include "mount-util.h"
#include "parse-util.h"
#include "path-util.h"
#include "string-util.h"
#include "strv.h"
+#include "pretty-print.h"
#include "util.h"
/* internal helper */
#define ANY_LUKS "LUKS"
+/* as in src/cryptsetup.h */
+#define CRYPT_SECTOR_SIZE 512
+#define CRYPT_MAX_SECTOR_SIZE 4096
static const char *arg_type = NULL; /* ANY_LUKS, CRYPT_LUKS1, CRYPT_LUKS2, CRYPT_TCRYPT or CRYPT_PLAIN */
static char *arg_cipher = NULL;
static unsigned arg_key_size = 0;
+#if HAVE_LIBCRYPTSETUP_SECTOR_SIZE
+static unsigned arg_sector_size = CRYPT_SECTOR_SIZE;
+#endif
static int arg_key_slot = CRYPT_ANY_SLOT;
static unsigned arg_keyfile_size = 0;
-static unsigned arg_keyfile_offset = 0;
+static uint64_t arg_keyfile_offset = 0;
static char *arg_hash = NULL;
static char *arg_header = NULL;
static unsigned arg_tries = 3;
static uint64_t arg_skip = 0;
static usec_t arg_timeout = USEC_INFINITY;
+STATIC_DESTRUCTOR_REGISTER(arg_cipher, freep);
+STATIC_DESTRUCTOR_REGISTER(arg_hash, freep);
+STATIC_DESTRUCTOR_REGISTER(arg_header, freep);
+STATIC_DESTRUCTOR_REGISTER(arg_tcrypt_keyfiles, strv_freep);
+
/* Options Debian's crypttab knows we don't:
precheck=
arg_key_size /= 8;
+ } else if ((val = startswith(option, "sector-size="))) {
+
+#if HAVE_LIBCRYPTSETUP_SECTOR_SIZE
+ r = safe_atou(val, &arg_sector_size);
+ if (r < 0) {
+ log_error_errno(r, "Failed to parse %s, ignoring: %m", option);
+ return 0;
+ }
+
+ if (arg_sector_size % 2) {
+ log_error("sector-size= not a multiple of 2, ignoring.");
+ return 0;
+ }
+
+ if (arg_sector_size < CRYPT_SECTOR_SIZE || arg_sector_size > CRYPT_MAX_SECTOR_SIZE) {
+ log_error("sector-size= is outside of %u and %u, ignoring.", CRYPT_SECTOR_SIZE, CRYPT_MAX_SECTOR_SIZE);
+ return 0;
+ }
+#else
+ log_error("sector-size= is not supported, compiled with old libcryptsetup.");
+ return 0;
+#endif
+
} else if ((val = startswith(option, "key-slot="))) {
arg_type = ANY_LUKS;
}
} else if ((val = startswith(option, "keyfile-offset="))) {
+ uint64_t off;
- r = safe_atou(val, &arg_keyfile_offset);
+ r = safe_atou64(val, &off);
if (r < 0) {
log_error_errno(r, "Failed to parse %s, ignoring: %m", option);
return 0;
}
+ if ((size_t) off != off) {
+ /* https://gitlab.com/cryptsetup/cryptsetup/issues/359 */
+ log_error("keyfile-offset= value would truncated to %zu, ignoring.", (size_t) off);
+ return 0;
+ }
+
+ arg_keyfile_offset = off;
+
} else if ((val = startswith(option, "hash="))) {
r = free_and_strdup(&arg_hash, val);
if (r < 0)
return 0;
}
-static int disk_major_minor(const char *path, char **ret) {
- struct stat st;
-
- assert(path);
-
- if (stat(path, &st) < 0)
- return -errno;
-
- if (!S_ISBLK(st.st_mode))
- return -EINVAL;
-
- if (asprintf(ret, "/dev/block/%d:%d", major(st.st_rdev), minor(st.st_rdev)) < 0)
- return -errno;
-
- return 0;
-}
-
static char* disk_description(const char *path) {
-
static const char name_fields[] =
"ID_PART_ENTRY_NAME\0"
"DM_NAME\0"
"ID_MODEL\0";
_cleanup_(sd_device_unrefp) sd_device *device = NULL;
+ const char *i, *name;
struct stat st;
- const char *i;
- int r;
assert(path);
if (!S_ISBLK(st.st_mode))
return NULL;
- r = sd_device_new_from_devnum(&device, 'b', st.st_rdev);
- if (r < 0)
+ if (sd_device_new_from_devnum(&device, 'b', st.st_rdev) < 0)
return NULL;
- NULSTR_FOREACH(i, name_fields) {
- const char *name;
-
- r = sd_device_get_property_value(device, i, &name);
- if (r >= 0 && !isempty(name))
+ NULSTR_FOREACH(i, name_fields)
+ if (sd_device_get_property_value(device, i, &name) >= 0 &&
+ !isempty(name))
return strdup(name);
- }
return NULL;
}
}
static int get_password(const char *vol, const char *src, usec_t until, bool accept_cached, char ***ret) {
- _cleanup_free_ char *description = NULL, *name_buffer = NULL, *mount_point = NULL, *maj_min = NULL, *text = NULL, *escaped_name = NULL;
+ _cleanup_free_ char *description = NULL, *name_buffer = NULL, *mount_point = NULL, *text = NULL, *disk_path = NULL;
_cleanup_strv_free_erase_ char **passwords = NULL;
const char *name = NULL;
char **p, *id;
description = disk_description(src);
mount_point = disk_mount_point(vol);
+ disk_path = cescape(src);
+ if (!disk_path)
+ return log_oom();
+
if (description && streq(vol, description))
/* If the description string is simply the
* volume name, then let's not show this
name = name_buffer ? name_buffer : vol;
- if (asprintf(&text, "Please enter passphrase for disk %s!", name) < 0)
+ if (asprintf(&text, "Please enter passphrase for disk %s:", name) < 0)
return log_oom();
- if (src)
- (void) disk_major_minor(src, &maj_min);
-
- if (maj_min) {
- escaped_name = maj_min;
- maj_min = NULL;
- } else
- escaped_name = cescape(name);
-
- if (!escaped_name)
- return log_oom();
-
- id = strjoina("cryptsetup:", escaped_name);
+ id = strjoina("cryptsetup:", disk_path);
r = ask_password_auto(text, "drive-harddisk", id, "cryptsetup", until,
ASK_PASSWORD_PUSH_CACHE | (accept_cached*ASK_PASSWORD_ACCEPT_CACHED),
assert(strv_length(passwords) == 1);
- if (asprintf(&text, "Please enter passphrase for disk %s! (verification)", name) < 0)
+ if (asprintf(&text, "Please enter passphrase for disk %s (verification):", name) < 0)
return log_oom();
- id = strjoina("cryptsetup-verification:", escaped_name);
+ id = strjoina("cryptsetup-verification:", disk_path);
r = ask_password_auto(text, "drive-harddisk", id, "cryptsetup", until, ASK_PASSWORD_PUSH_CACHE, &passwords2);
if (r < 0)
*p = c;
}
- *ret = passwords;
- passwords = NULL;
+ *ret = TAKE_PTR(passwords);
return 0;
}
struct crypt_params_plain params = {
.offset = arg_offset,
.skip = arg_skip,
+#if HAVE_LIBCRYPTSETUP_SECTOR_SIZE
+ .sector_size = arg_sector_size,
+#endif
};
const char *cipher, *cipher_mode;
_cleanup_free_ char *truncated_cipher = NULL;
}
static int help(void) {
+ _cleanup_free_ char *link = NULL;
+ int r;
+
+ r = terminal_urlify_man("systemd-cryptsetup@.service", "8", &link);
+ if (r < 0)
+ return log_oom();
printf("%s attach VOLUME SOURCEDEVICE [PASSWORD] [OPTIONS]\n"
"%s detach VOLUME\n\n"
- "Attaches or detaches an encrypted block device.\n",
- program_invocation_short_name,
- program_invocation_short_name);
+ "Attaches or detaches an encrypted block device.\n"
+ "\nSee the %s for details.\n"
+ , program_invocation_short_name
+ , program_invocation_short_name
+ , link
+ );
return 0;
}
-int main(int argc, char *argv[]) {
+static int run(int argc, char *argv[]) {
_cleanup_(crypt_freep) struct crypt_device *cd = NULL;
- int r = -EINVAL;
+ int r;
- if (argc <= 1) {
- r = help();
- goto finish;
- }
+ if (argc <= 1)
+ return help();
if (argc < 3) {
log_error("This program requires at least two arguments.");
- goto finish;
+ return -EINVAL;
}
- log_set_target(LOG_TARGET_AUTO);
- log_parse_environment();
- log_open();
+ log_setup_service();
umask(0022);
if (argc < 4) {
log_error("attach requires at least two arguments.");
- goto finish;
+ return -EINVAL;
}
if (argc >= 5 &&
}
if (argc >= 6 && argv[5][0] && !streq(argv[5], "-")) {
- if (parse_options(argv[5]) < 0)
- goto finish;
+ r = parse_options(argv[5]);
+ if (r < 0)
+ return r;
}
/* A delicious drop of snake oil */
r = crypt_init(&cd, arg_header);
} else
r = crypt_init(&cd, argv[3]);
- if (r < 0) {
- log_error_errno(r, "crypt_init() failed: %m");
- goto finish;
- }
+ if (r < 0)
+ return log_error_errno(r, "crypt_init() failed: %m");
crypt_set_log_callback(cd, cryptsetup_log_glue, NULL);
status = crypt_status(cd, argv[2]);
if (IN_SET(status, CRYPT_ACTIVE, CRYPT_BUSY)) {
log_info("Volume %s already active.", argv[2]);
- r = 0;
- goto finish;
+ return 0;
}
if (arg_readonly)
if (r == -EAGAIN)
continue;
if (r < 0)
- goto finish;
+ return r;
}
if (streq_ptr(arg_type, CRYPT_TCRYPT))
key_file = NULL;
continue;
}
- if (r != -EPERM) {
- log_error_errno(r, "Failed to activate: %m");
- goto finish;
- }
+ if (r != -EPERM)
+ return log_error_errno(r, "Failed to activate: %m");
log_warning("Invalid passphrase.");
}
if (arg_tries != 0 && tries >= arg_tries) {
log_error("Too many attempts; giving up.");
- r = -EPERM;
- goto finish;
+ return -EPERM;
}
} else if (streq(argv[1], "detach")) {
r = crypt_init_by_name(&cd, argv[2]);
if (r == -ENODEV) {
log_info("Volume %s already inactive.", argv[2]);
- r = 0;
- goto finish;
- }
- if (r < 0) {
- log_error_errno(r, "crypt_init_by_name() failed: %m");
- goto finish;
+ return 0;
}
+ if (r < 0)
+ return log_error_errno(r, "crypt_init_by_name() failed: %m");
crypt_set_log_callback(cd, cryptsetup_log_glue, NULL);
r = crypt_deactivate(cd, argv[2]);
- if (r < 0) {
- log_error_errno(r, "Failed to deactivate: %m");
- goto finish;
- }
+ if (r < 0)
+ return log_error_errno(r, "Failed to deactivate: %m");
} else {
log_error("Unknown verb %s.", argv[1]);
- goto finish;
+ return -EINVAL;
}
- r = 0;
-
-finish:
- free(arg_cipher);
- free(arg_hash);
- free(arg_header);
- strv_free(arg_tcrypt_keyfiles);
-
- return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
+ return 0;
}
+
+DEFINE_MAIN_FUNCTION(run);
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