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Tcrypt uses a different approach to passphrases/key files. The
passphrase and all key files are incorporated into the "password"
to open the volume. So, the idea of slots that provide a way to
open the volume with different passphrases/key files that are
independent from each other like with LUKS does not apply.
Therefore, we use the key file from /etc/crypttab as the source
for the passphrase. The actual key files that are combined with
the passphrase into a password are provided as a new option in
/etc/crypttab and can be given multiple times if more than one
key file is used by a volume.
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Also use _cleanup_free_ where possible.
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This semi-reverts 8973790ee6f62132b1b57de15c4edaef2c097004.
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It's polite to print the name of the link that wasn't created,
and it makes little sense to print the target.
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If the key file cannot be accessed, we can at least ask for the
password.
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http://lists.freedesktop.org/archives/systemd-devel/2013-April/010510.html
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Also clarify rd.luks.uuid and luks.uuid in the manual.
https://bugzilla.redhat.com/show_bug.cgi?id=905683
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cryptsetup itself has no timeout as default from the beginning. So the
default timeout has been "0" from the beginning.
https://bugzilla.redhat.com/show_bug.cgi?id=949702
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Before, we would initialize many fields twice: first
by filling the structure with zeros, and then a second
time with the real values. We can let the compiler do
the job for us, avoiding one copy.
A downside of this patch is that text gets slightly
bigger. This is because all zero() calls are effectively
inlined:
$ size build/.libs/systemd
text data bss dec hex filename
before 897737 107300 2560 1007597 f5fed build/.libs/systemd
after 897873 107300 2560 1007733 f6075 build/.libs/systemd
… actually less than 1‰.
A few asserts that the parameter is not null had to be removed. I
don't think this changes much, because first, it is quite unlikely
for the assert to fail, and second, an immediate SEGV is almost as
good as an assert.
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The password query for a crypto device currently times out after 90s,
which is too short to grab a cup of coffee when a machine boots up.
The resulting decrypted device /dev/mapper/luks-<uuid> might not
be a mountpoint (but part of a LVM PV or raid array)
and therefore the timeout cannot be controlled by the settings
in /etc/fstab. For this reason this device should not carry its own timeout.
Also the encrypted device /dev/disk/by-*/* already has a timeout and
additionally the timeout for the password query is set in /etc/crypttab.
This patch disables the timeout of the resulting decrypted devices by creating
<device-unit>.d/50-job-timeout-sec-0.conf files with "JobTimeoutSec=0".
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Internally we store all time values in usec_t, however parse_usec()
actually was used mostly to parse values in seconds (unless explicit
units were specified to define a different unit). Hence, be clear about
this and name the function about what we pass into it, not what we get
out of it.
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This ensures that the keyfile is available during the opening of the encrypted
device.
Also dropped the explicit ordering Before=local-fs.target, as the containers
are ordered implicitly by their content.
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Fixes: https://bugzilla.novell.com/show_bug.cgi?id=730496
https://bugs.freedesktop.org/show_bug.cgi?id=60821
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If there's a GPT partition label set for a LUKS partition, then it's
nicer to show that than the model number, when asking for a passphrase.
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If rd.luks.uuid or luks.uuid is specified on the kernel command, only
generate units for these UUIDs. Additionally use the information in
/etc/crypttab unless rd.luks.crypttab=0 or luks.crypttab=0 is specified.
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Mukund Sivaraman pointed out that cryptsetup(5) mentions the "read-only"
option, while the code understands "readonly".
We could just fix the manpage, but for consistency in naming of
multi-word options it would be prettier to have "read-only". So let's
accept both spellings.
BZ: https://bugzilla.redhat.com/show_bug.cgi?id=903463
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This was documented in the man page and supported in the generator,
but systemd-cryptestup itself would fail with this option.
systemd-cryptsetup should ignore 'nofail', as it does with 'noauto'.
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"plain" is a semantic value that cryptsetup(8) uses to describe a plain
dm-crypt volume that does not use a hash. Catch this value earlier and
ensure that a NULL params.hash is passed to crypt_format to avoid
passing an invalid hash type to the libcryptsetup backend.
FDO bug #56593.
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This is useful e.g. if the keyfile is a raw device, where only parts of it
should be read. It is typically used whenever the keyfile-offset= option is
specified.
Tested-by: Erik Westrup <erik.westrup@gmail.com>
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also a number of minor fixups and bug fixes: spelling, oom errors
that didn't print errors, not properly forwarding error codes,
few more consistency issues, et cetera
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glibc/glib both use "out of memory" consistantly so maybe we should
consider that instead of this.
Eliminates one string out of a number of binaries. Also fixes extra newline
in udev/scsi_id
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all other dependencies are in 3rd person. Change BindTo= accordingly to
BindsTo=.
Of course, the dependency is widely used, hence we parse the old name
too for compatibility.
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This is to match strappend() and the other string related functions.
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This is useful if your keyfile is a block device, and you want to
use a specific part of it, such as an area between the MBR and the
first partition.
This feature is documented in the Arch wiki[0], and has been supported
by the Arch initscripts, so would be nice to get this into systemd.
This requires libcryptsetup >= 1.4.2 (released 12.4.2012).
Acked-by: Paul Menzel <paulepanter@users.sourceforge.net>
[0]:
<https://wiki.archlinux.org/index.php/System_Encryption_with_LUKS#
Storing_the_key_between_MBR_and_1st_partition>
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It's also our own code, hence should have the prefix.
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This generalizes a bit of the functionality already available in dracut.
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context
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Previously generated units were always placed at the end of the search
path. With this change there will be three unit dirs instead of one, to
place generated entries at the beginning, in the middle and at the end
of the search path:
beginning: for units that need to override all configuration, regardless
of user or vendor. Example use: system-update-generator uses this to
temporarily redirect default.target.
middle: for units that need to override vendor configuration, but not
vendor configuration. Example use: /etc/fstab should override vendor
supplied configuration (think /tmp), but should not override native user
configuration.
end: does not override anything but is available as well. Possible usage
might be to convert D-Bus bus service files to native units but allowing
vendor supplied native units to win.
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UnitPath= is also writable via native units and may be used by generators
to clarify from which file a unit is generated. This patch also hooks up
the cryptsetup and fstab generators to set UnitPath= accordingly.
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deadlocks
This makes all generators log to kmsg by default.
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Bit by bit we should remove non-unit parsing from PID 1 and move into
generators, to clean up our code base a bit and clearly separate
parsers.
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