#include "alloc-util.h"
#include "dropin.h"
+#include "escape.h"
#include "fd-util.h"
#include "fileio.h"
#include "fstab-util.h"
#include "generator.h"
#include "hashmap.h"
+#include "id128-util.h"
#include "log.h"
#include "mkdir.h"
#include "parse-util.h"
bool create;
} crypto_device;
-static const char *arg_dest = "/tmp";
+static const char *arg_dest = NULL;
static bool arg_enabled = true;
static bool arg_read_crypttab = true;
static bool arg_whitelist = false;
static char *arg_default_options = NULL;
static char *arg_default_keyfile = NULL;
+STATIC_DESTRUCTOR_REGISTER(arg_disks, hashmap_freep);
+STATIC_DESTRUCTOR_REGISTER(arg_default_options, freep);
+STATIC_DESTRUCTOR_REGISTER(arg_default_keyfile, freep);
+
static int generate_keydev_mount(const char *name, const char *keydev, char **unit, char **mount) {
- _cleanup_free_ char *u = NULL, *what = NULL, *where = NULL;
+ _cleanup_free_ char *u = NULL, *what = NULL, *where = NULL, *name_escaped = NULL;
_cleanup_fclose_ FILE *f = NULL;
int r;
return r;
r = mkdir("/run/systemd/cryptsetup", 0700);
- if (r < 0)
- return r;
+ if (r < 0 && errno != EEXIST)
+ return -errno;
- where = strjoin("/run/systemd/cryptsetup/keydev-", name);
+ name_escaped = cescape(name);
+ if (!name_escaped)
+ return -ENOMEM;
+
+ where = strjoin("/run/systemd/cryptsetup/keydev-", name_escaped);
if (!where)
return -ENOMEM;
r = mkdir(where, 0700);
- if (r < 0)
- return r;
+ if (r < 0 && errno != EEXIST)
+ return -errno;
r = unit_name_from_path(where, ".mount", &u);
if (r < 0)
swap = fstab_test_option(options, "swap\0");
netdev = fstab_test_option(options, "_netdev\0");
- if (tmp && swap) {
- log_error("Device '%s' cannot be both 'tmp' and 'swap'. Ignoring.", name);
- return -EINVAL;
- }
+ if (tmp && swap)
+ return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
+ "Device '%s' cannot be both 'tmp' and 'swap'. Ignoring.",
+ name);
name_escaped = specifier_escape(name);
if (!name_escaped)
}
if (keydev && !password)
- return log_error_errno(-EINVAL, "Keydev is specified, but path to the password file is missing: %m");
+ return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
+ "Key device is specified, but path to the password file is missing.");
r = generator_open_unit_file(arg_dest, NULL, n, &f);
if (r < 0)
netdev ? "remote-cryptsetup.target" : "cryptsetup.target");
if (password) {
- if (STR_IN_SET(password, "/dev/urandom", "/dev/random", "/dev/hw_random"))
+ if (PATH_IN_SET(password, "/dev/urandom", "/dev/random", "/dev/hw_random"))
fputs("After=systemd-random-seed.service\n", f);
else if (!STR_IN_SET(password, "-", "none")) {
_cleanup_free_ char *uu;
return log_error_errno(r, "Failed to write unit file %s: %m", n);
if (!noauto) {
- r = generator_add_symlink(arg_dest, d, "wants", n);
- if (r < 0)
- return r;
-
r = generator_add_symlink(arg_dest,
netdev ? "remote-cryptsetup.target" : "cryptsetup.target",
nofail ? "wants" : "requires", n);
return 0;
}
-static void crypt_device_free(crypto_device *d) {
+static crypto_device* crypt_device_free(crypto_device *d) {
+ if (!d)
+ return NULL;
+
free(d->uuid);
free(d->keyfile);
free(d->keydev);
free(d->name);
free(d->options);
- free(d);
+ return mfree(d);
}
static crypto_device *get_crypto_device(const char *uuid) {
return log_oom();
} else if (streq(key, "luks.key")) {
+ size_t n;
+ _cleanup_free_ char *keyfile = NULL, *keydev = NULL;
+ char *c;
+ const char *keyspec;
if (proc_cmdline_value_missing(key, value))
return 0;
- r = sscanf(value, "%m[0-9a-fA-F-]=%ms", &uuid, &uuid_value);
- if (r == 2) {
- char *c;
- _cleanup_free_ char *keyfile = NULL, *keydev = NULL;
+ n = strspn(value, LETTERS DIGITS "-");
+ if (value[n] != '=') {
+ if (free_and_strdup(&arg_default_keyfile, value) < 0)
+ return log_oom();
+ return 0;
+ }
- d = get_crypto_device(uuid);
- if (!d)
- return log_oom();
+ uuid = strndup(value, n);
+ if (!uuid)
+ return log_oom();
- c = strrchr(uuid_value, ':');
- if (!c)
- /* No keydev specified */
- return free_and_replace(d->keyfile, uuid_value);
+ if (!id128_is_valid(uuid)) {
+ log_warning("Failed to parse luks.key= kernel command line switch. UUID is invalid, ignoring.");
+ return 0;
+ }
- *c = '\0';
- keyfile = strdup(uuid_value);
- keydev = strdup(++c);
+ d = get_crypto_device(uuid);
+ if (!d)
+ return log_oom();
+
+ keyspec = value + n + 1;
+ c = strrchr(keyspec, ':');
+ if (c) {
+ *c = '\0';
+ keyfile = strdup(keyspec);
+ keydev = strdup(c + 1);
if (!keyfile || !keydev)
return log_oom();
+ } else {
+ /* No keydev specified */
+ keyfile = strdup(keyspec);
+ if (!keyfile)
+ return log_oom();
+ }
- free_and_replace(d->keyfile, keyfile);
- free_and_replace(d->keydev, keydev);
- } else if (free_and_strdup(&arg_default_keyfile, value) < 0)
- return log_oom();
-
+ free_and_replace(d->keyfile, keyfile);
+ free_and_replace(d->keydev, keydev);
} else if (streq(key, "luks.name")) {
if (proc_cmdline_value_missing(key, value))
}
static int add_crypttab_devices(void) {
- struct stat st;
- unsigned crypttab_line = 0;
_cleanup_fclose_ FILE *f = NULL;
+ unsigned crypttab_line = 0;
+ struct stat st;
+ int r;
if (!arg_read_crypttab)
return 0;
}
for (;;) {
- int r, k;
- char line[LINE_MAX], *l, *uuid;
+ _cleanup_free_ char *line = NULL, *name = NULL, *device = NULL, *keyfile = NULL, *options = NULL;
crypto_device *d = NULL;
- _cleanup_free_ char *name = NULL, *device = NULL, *keyfile = NULL, *options = NULL;
+ char *l, *uuid;
+ int k;
- if (!fgets(line, sizeof(line), f))
+ r = read_line(f, LONG_LINE_MAX, &line);
+ if (r < 0)
+ return log_error_errno(r, "Failed to read /etc/crypttab: %m");
+ if (r == 0)
break;
crypttab_line++;
l = strstrip(line);
- if (IN_SET(*l, 0, '#'))
+ if (IN_SET(l[0], 0, '#'))
continue;
k = sscanf(l, "%ms %ms %ms %ms", &name, &device, &keyfile, &options);
continue;
}
- uuid = startswith(device, "UUID=");
+ uuid = STARTSWITH_SET(device, "UUID=", "luks-");
if (!uuid)
uuid = path_startswith(device, "/dev/disk/by-uuid/");
- if (!uuid)
- uuid = startswith(name, "luks-");
if (uuid)
d = hashmap_get(arg_disks, uuid);
return 0;
}
-int main(int argc, char *argv[]) {
- int r;
-
- if (argc > 1 && argc != 4) {
- log_error("This program takes three or no arguments.");
- return EXIT_FAILURE;
- }
-
- if (argc > 1)
- arg_dest = argv[1];
+DEFINE_PRIVATE_HASH_OPS_WITH_VALUE_DESTRUCTOR(crypt_device_hash_ops, char, string_hash_func, string_compare_func,
+ crypto_device, crypt_device_free);
- log_set_prohibit_ipc(true);
- log_set_target(LOG_TARGET_AUTO);
- log_parse_environment();
- log_open();
+static int run(const char *dest, const char *dest_early, const char *dest_late) {
+ int r;
- umask(0022);
+ assert_se(arg_dest = dest);
- arg_disks = hashmap_new(&string_hash_ops);
- if (!arg_disks) {
- r = log_oom();
- goto finish;
- }
+ arg_disks = hashmap_new(&crypt_device_hash_ops);
+ if (!arg_disks)
+ return log_oom();
r = proc_cmdline_parse(parse_proc_cmdline_item, NULL, PROC_CMDLINE_STRIP_RD_PREFIX);
- if (r < 0) {
- log_warning_errno(r, "Failed to parse kernel command line: %m");
- goto finish;
- }
+ if (r < 0)
+ return log_warning_errno(r, "Failed to parse kernel command line: %m");
- if (!arg_enabled) {
- r = 0;
- goto finish;
- }
+ if (!arg_enabled)
+ return 0;
r = add_crypttab_devices();
if (r < 0)
- goto finish;
+ return r;
r = add_proc_cmdline_devices();
if (r < 0)
- goto finish;
-
- r = 0;
-
-finish:
- hashmap_free_with_destructor(arg_disks, crypt_device_free);
- free(arg_default_options);
- free(arg_default_keyfile);
+ return r;
- return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
+ return 0;
}
+
+DEFINE_MAIN_GENERATOR_FUNCTION(run);
projects / thirdparty / systemd.git / blobdiff