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cryptsetup-generator: allow whitespace characters in keydev specification

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For example, <luks.uuid>=/keyfile:LABEL="KEYFILE FS" previously wouldn't
work, because we truncated label at the first whitespace character,
i.e. LABEL="KEYFILE".
This commit is contained in:
Michal Sekletar 2018-09-04 20:03:34 +02:00
parent 579875bc4a
commit 7949dfa73a
1 changed files with 43 additions and 21 deletions
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64
src/cryptsetup/cryptsetup-generator.c
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@ -6,11 +6,13 @@
#include "alloc-util.h"
#include "def.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"
@ -40,7 +42,7 @@ static char *arg_default_options = NULL;
static char *arg_default_keyfile = NULL;
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;
@ -57,7 +59,11 @@ static int generate_keydev_mount(const char *name, const char *keydev, char **un
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;
@ -392,36 +398,52 @@ static int parse_proc_cmdline_item(const char *key, const char *value, void *dat
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))