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systemd/SOURCES/0051-cryptsetup-generator-a...

130 lines
4.9 KiB

From 2a4d58bb2ab9ba5487785cc167932440a4f0c13d Mon Sep 17 00:00:00 2001
From: Michal Sekletar <msekleta@redhat.com>
Date: Tue, 4 Sep 2018 20:03:34 +0200
Subject: [PATCH] cryptsetup-generator: allow whitespace characters in keydev
specification
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".
(cherry-picked from commit 7949dfa73a44ae6524779689483d12243dfbcfdf)
Related: #1656869
---
src/cryptsetup/cryptsetup-generator.c | 64 ++++++++++++++++++---------
1 file changed, 43 insertions(+), 21 deletions(-)
diff --git a/src/cryptsetup/cryptsetup-generator.c b/src/cryptsetup/cryptsetup-generator.c
index 03c513c26e..52c1262728 100644
--- a/src/cryptsetup/cryptsetup-generator.c
+++ b/src/cryptsetup/cryptsetup-generator.c
@@ -5,11 +5,13 @@
#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"
@@ -39,7 +41,7 @@ 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;
@@ -56,7 +58,11 @@ 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;
@@ -386,36 +392,52 @@ 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;
+ }
+
+ d = get_crypto_device(uuid);
+ if (!d)
+ return log_oom();
- *c = '\0';
- keyfile = strdup(uuid_value);
- keydev = strdup(++c);
+ 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))