You can not select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
systemd/SOURCES/0022-cryptsetup-add-support...

120 lines
4.3 KiB

From a046230cfb7e02938e3ad2ac85515636b319651e Mon Sep 17 00:00:00 2001
From: Dimitri John Ledkov <xnox@ubuntu.com>
Date: Wed, 29 Aug 2018 15:38:09 +0100
Subject: [PATCH] cryptsetup: add support for sector-size= option (#9936)
Bug-Ubuntu: https://launchpad.net/bugs/1776626
Closes #8881.
(cherry picked from commit a9fc640671ef60ac949f1ace6fa687ff242fc233)
Resolves: #1572563
---
man/crypttab.xml | 9 +++++++++
meson.build | 6 ++++++
src/cryptsetup/cryptsetup.c | 30 ++++++++++++++++++++++++++++++
3 files changed, 45 insertions(+)
diff --git a/man/crypttab.xml b/man/crypttab.xml
index dcaf03d2ca..3574ce00da 100644
--- a/man/crypttab.xml
+++ b/man/crypttab.xml
@@ -250,6 +250,15 @@
option.</para></listitem>
</varlistentry>
+ <varlistentry>
+ <term><option>sector-size=</option></term>
+
+ <listitem><para>Specifies the sector size in bytes. See
+ <citerefentry project='die-net'><refentrytitle>cryptsetup</refentrytitle><manvolnum>8</manvolnum></citerefentry>
+ for possible values and the default value of this
+ option.</para></listitem>
+ </varlistentry>
+
<varlistentry>
<term><option>swap</option></term>
diff --git a/meson.build b/meson.build
index a0e7240708..f308db2631 100644
--- a/meson.build
+++ b/meson.build
@@ -927,11 +927,17 @@ if want_libcryptsetup != 'false' and not fuzzer_build
version : '>= 1.6.0',
required : want_libcryptsetup == 'true')
have = libcryptsetup.found()
+ have_sector = cc.has_member(
+ 'struct crypt_params_plain',
+ 'sector_size',
+ prefix : '#include <libcryptsetup.h>')
else
have = false
+ have_sector = false
libcryptsetup = []
endif
conf.set10('HAVE_LIBCRYPTSETUP', have)
+conf.set10('HAVE_LIBCRYPTSETUP_SECTOR_SIZE', have_sector)
want_libcurl = get_option('libcurl')
if want_libcurl != 'false' and not fuzzer_build
diff --git a/src/cryptsetup/cryptsetup.c b/src/cryptsetup/cryptsetup.c
index 832168184a..87008cb969 100644
--- a/src/cryptsetup/cryptsetup.c
+++ b/src/cryptsetup/cryptsetup.c
@@ -23,10 +23,14 @@
/* 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;
+static unsigned arg_sector_size = CRYPT_SECTOR_SIZE;
static int arg_key_slot = CRYPT_ANY_SLOT;
static unsigned arg_keyfile_size = 0;
static uint64_t arg_keyfile_offset = 0;
@@ -86,6 +90,29 @@ static int parse_one_option(const char *option) {
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;
@@ -471,6 +498,9 @@ static int attach_luks_or_plain(struct crypt_device *cd,
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;