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Commit Graph

119 Commits

Author SHA1 Message Date
Lennart Poettering
3ffd4af220 util-lib: split out fd-related operations into fd-util.[ch]
There are more than enough to deserve their own .c file, hence move them
over.
2015-10-25 13:19:18 +01:00
Lennart Poettering
07630cea1f util-lib: split our string related calls from util.[ch] into its own file string-util.[ch]
There are more than enough calls doing string manipulations to deserve
its own files, hence do something about it.

This patch also sorts the #include blocks of all files that needed to be
updated, according to the sorting suggestions from CODING_STYLE. Since
pretty much every file needs our string manipulation functions this
effectively means that most files have sorted #include blocks now.

Also touches a few unrelated include files.
2015-10-24 23:05:02 +02:00
Lennart Poettering
4f5dd3943b util: split out escaping code into escape.[ch]
This really deserves its own file, given how much code this is now.
2015-10-24 23:04:42 +02:00
Zbigniew Jędrzejewski-Szmek
ab84f5b95e strv: Add _cleanup_strv_free_erase_ and _cleanup_string_free_erase_ 2015-10-19 23:13:07 +02:00
Lennart Poettering
1602b00853 tree-wide: whenever we deal with passwords, erase them from memory after use
A bit snake-oilish, but can't hurt.
2015-10-19 23:13:07 +02:00
Lennart Poettering
e287086b8a ask-password: add support for caching passwords in the kernel keyring
This adds support for caching harddisk passwords in the kernel keyring
if it is available, thus supporting caching without Plymouth being
around.

This is also useful for hooking up "gdm-auto-login" with the collected
boot-time harddisk password, in order to support gnome keyring
passphrase unlocking via the HDD password, if it is the same.

Any passwords added to the kernel keyring this way have a timeout of
2.5min at which time they are purged from the kernel.
2015-10-07 12:26:14 +02:00
Jan Janssen
c802a7306b cryptsetup-generator: Properly check return code 2015-09-10 10:23:49 +02:00
Lennart Poettering
ece174c543 tree-wide: drop {} from one-line if blocks
Patch via coccinelle.
2015-09-09 08:20:20 +02:00
David Herrmann
97b11eedff tree-wide: introduce mfree()
Pretty trivial helper which wraps free() but returns NULL, so we can
simplify this:
        free(foobar);
        foobar = NULL;
to this:
        foobar = mfree(foobar);
2015-07-31 19:56:38 +02:00
Harald Hoyer
e51b9486d1 cryptsetup: craft a unique ID with the source device
If cryptsetup is called with a source device as argv[3], then craft the
ID for the password agent with a unique device path.

If possible "/dev/block/<maj>:<min>" is used, otherwise the original
argv[3] is used.

This enables password agents like petera [1] to provide a password
according to the source device. The original ID did not carry enough
information and was more targeted for a human readable string, which
is specified in the "Message" field anyway.

With this patch the ID of the ask.XXX ini file looks like this:
ID=cryptsetup:/dev/block/<maj>:<min>

[1] https://github.com/npmccallum/petera
2015-06-09 10:17:55 +02:00
Zbigniew Jędrzejewski-Szmek
4652c56c59 Use fflush_and_check() in more places 2015-05-16 18:11:32 -04:00
Lennart Poettering
7410616cd9 core: rework unit name validation and manipulation logic
A variety of changes:

- Make sure all our calls distuingish OOM from other errors if OOM is
  not the only error possible.

- Be much stricter when parsing escaped paths, do not accept trailing or
  leading escaped slashes.

- Change unit validation to take a bit mask for allowing plain names,
  instance names or template names or an combination thereof.

- Refuse manipulating invalid unit name
2015-05-05 15:06:42 -07:00
Martin Pitt
4eac277367 cryptsetup: Implement offset and skip options
These are useful for plain devices as they don't have any metadata by
themselves. Instead of using an unreliable hardcoded device name in crypttab
you can then put static metadata at the start of the partition for a stable
UUID or label.

https://bugs.freedesktop.org/show_bug.cgi?id=87717
https://bugs.debian.org/751707
https://launchpad.net/bugs/953875
2015-04-17 10:53:01 -05:00
Tom Gundersen
9a97aaae3b cryptsetup: port from libudev to sd-device 2015-04-02 00:18:27 +02:00
Zbigniew Jędrzejewski-Szmek
71e4e12584 cryptsetup-generator: remove warning about crypttab access mode
This file contains no privileged data — just names of devices to decrypt
and files containing keys. On a running system most of this can be inferred from
the device tree anyway.
2015-03-14 23:03:44 -04:00
Thomas Hindoe Paaboel Andersen
2eec67acbb remove unused includes
This patch removes includes that are not used. The removals were found with
include-what-you-use which checks if any of the symbols from a header is
in use.
2015-02-23 23:53:42 +01:00
Lennart Poettering
63c372cb9d util: rework strappenda(), and rename it strjoina()
After all it is now much more like strjoin() than strappend(). At the
same time, add support for NULL sentinels, even if they are normally not
necessary.
2015-02-03 02:05:59 +01:00
Martin Pitt
3f4d56a069 cryptsetup: only warn on real key files
Simplify the check from commit 05f73ad to only apply the warning to regular
files instead of enumerating device nodes.
2015-02-02 16:53:39 +01:00
Cristian Rodríguez
05f73ad22b cryptsetup: Do not warn If the key is /dev/*random
Using /dev/urandom as a key is valid for swap, do not
warn if this devices are world readable.
2015-02-02 16:41:31 +01:00
Zbigniew Jędrzejewski-Szmek
b9f111b93f Support negated fstab options
We would ignore options like "fail" and "auto", and for any option
which takes a value the first assignment would win. Repeated and
options equivalent to the default are rarely used, but they have been
documented forever, and people might use them. Especially on the
kernel command line it is easier to append a repeated or negated
option at the end.
2015-01-11 23:41:41 -05:00
Zbigniew Jędrzejewski-Szmek
a6dba97829 cryptsetup-generator: remove duplicated function 2015-01-11 23:41:41 -05:00
Andrey Chaser
7376e83528 cryptsetup: support header= option
https://bugs.freedesktop.org/show_bug.cgi?id=66396
2015-01-08 16:33:59 -05:00
Jan Janssen
baade8cc23 cryptsetup-generator: Add support for naming luks devices on kernel cmdline 2014-12-05 01:29:45 +01:00
Jan Janssen
6cd5b12aa5 cryptsetup-generator: Add support for UUID-specific key files on kernel command line 2014-12-05 01:29:43 +01:00
Jan Janssen
0fa9e53d12 cryptsetup-generator: Split main() into more functions and use hasmaps 2014-12-05 01:27:00 +01:00
Michal Schmidt
4a62c710b6 treewide: another round of simplifications
Using the same scripts as in f647962d64 "treewide: yet more log_*_errno
+ return simplifications".
2014-11-28 19:57:32 +01:00
Michal Schmidt
56f64d9576 treewide: use log_*_errno whenever %m is in the format string
If the format string contains %m, clearly errno must have a meaningful
value, so we might as well use log_*_errno to have ERRNO= logged.

Using:
find . -name '*.[ch]' | xargs sed -r -i -e \
's/log_(debug|info|notice|warning|error|emergency)\((".*%m.*")/log_\1_errno(errno, \2/'

Plus some whitespace, linewrap, and indent adjustments.
2014-11-28 19:49:27 +01:00
Michal Schmidt
23bbb0de4e treewide: more log_*_errno + return simplifications 2014-11-28 18:24:30 +01:00
Michal Schmidt
da927ba997 treewide: no need to negate errno for log_*_errno()
It corrrectly handles both positive and negative errno values.
2014-11-28 13:29:21 +01:00
Michal Schmidt
0a1beeb642 treewide: auto-convert the simple cases to log_*_errno()
As a followup to 086891e5c1 "log: add an "error" parameter to all
low-level logging calls and intrdouce log_error_errno() as log calls
that take error numbers", use sed to convert the simple cases to use
the new macros:

find . -name '*.[ch]' | xargs sed -r -i -e \
's/log_(debug|info|notice|warning|error|emergency)\("(.*)%s"(.*), strerror\(-([a-zA-Z_]+)\)\);/log_\1_errno(-\4, "\2%m"\3);/'

Multi-line log_*() invocations are not covered.
And we also should add log_unit_*_errno().
2014-11-28 12:04:41 +01:00
Zbigniew Jędrzejewski-Szmek
8a52210c93 cryptsetup: default to no hash when keyfile is specified
For plain dm-crypt devices, the behavior of cryptsetup package is to
ignore the hash algorithm when a key file is provided. It seems wrong
to ignore a hash when it is explicitly specified, but we should default
to no hash if the keyfile is specified.

https://bugs.freedesktop.org/show_bug.cgi?id=52630
2014-11-24 09:14:18 -05:00
Lennart Poettering
b5884878a2 util: simplify proc_cmdline() to reuse get_process_cmdline()
Also, make all parsing of the kernel cmdline non-fatal.
2014-11-07 01:19:56 +01:00
Harald Hoyer
3f85ef0f05 s/commandline/command line/g 2014-11-06 15:34:18 +01:00
Hugo Grostabussiat
a6fb0dc138 cryptsetup: Fix timeout on dm device.
Fix a bug in systemd-cryptsetup-generator which caused the drop-in
setting the job timeout for the dm device unit to be written with a
name different than the unit name.

https://bugs.freedesktop.org/show_bug.cgi?id=84409
2014-10-24 02:14:49 +02:00
Lennart Poettering
0e2f14014c cryptsetup: fix an OOM check 2014-10-23 00:39:42 +02:00
Daniel Buch
d6bc8348d5 readahead: wipe out readahead 2014-09-25 16:39:18 +02:00
Zbigniew Jędrzejewski-Szmek
a2a5291b3f Reject invalid quoted strings
String which ended in an unfinished quote were accepted, potentially
with bad memory accesses.

Reject anything which ends in a unfished quote, or contains
non-whitespace characters right after the closing quote.

_FOREACH_WORD now returns the invalid character in *state. But this return
value is not checked anywhere yet.

Also, make 'word' and 'state' variables const pointers, and rename 'w'
to 'word' in various places. Things are easier to read if the same name
is used consistently.

mbiebl_> am I correct that something like this doesn't work
mbiebl_> ExecStart=/usr/bin/encfs --extpass='/bin/systemd-ask-passwd "Unlock EncFS"'
mbiebl_> systemd seems to strip of the quotes
mbiebl_> systemctl status shows
mbiebl_> ExecStart=/usr/bin/encfs --extpass='/bin/systemd-ask-password Unlock EncFS  $RootDir $MountPoint
mbiebl_> which is pretty weird
2014-07-31 04:00:31 -04:00
Karel Zak
7de80bfe2e Always check asprintf return code
There is a small number of the places in sources where we don't check
asprintf() return code and assume that after error the function
returns NULL pointer via the first argument. That's wrong, after
error the content of pointer is undefined.
2014-07-26 15:08:41 -04:00
Zbigniew Jędrzejewski-Szmek
8eea868708 cryptsetup: allow x-systemd.device-timeout
https://bugs.freedesktop.org/show_bug.cgi?id=54210
2014-06-30 18:41:17 -04:00
Lennart Poettering
bde29068aa cryptsetup: don't add unit dependency on /dev/null devices when it is listed as password file
As special magic, don't create device dependencies for /dev/null. Of
course, there might be similar devices we might want to include, but
given that none of them really make sense to specify as password source
there's really no point in checking for anything else here.

https://bugs.freedesktop.org/show_bug.cgi?id=75816
2014-06-23 19:18:44 +02:00
Lennart Poettering
8501384436 stop complaining about unknown kernel cmdline options
Also stop warning about unknown kernel cmdline options in the various
tools, not just in PID 1
2014-06-19 16:55:20 +02:00
Lennart Poettering
9542239eaf cryptsetup: introduce new cryptsetup-pre.traget unit so that services can make sure they are started before and stopped after any LUKS setup
https://bugzilla.redhat.com/show_bug.cgi?id=1097938
2014-06-18 00:09:46 +02:00
Thomas Hindoe Paaboel Andersen
f268f57f63 cryptsetup: check that password is not null
Beef up the assert to protect against passing null to strlen.

Found with scan-build.
2014-06-13 00:30:40 +02:00
David Härdeman
6131a78b4d Fix keysize handling in cryptsetup (bits vs. bytes)
The command line key-size is in bits but the libcryptsetup API expects bytes.

Note that the modulo 8 check is in the original cryptsetup binary as well, so
it's no new limitation.

(v2: changed the point at which the /= 8 is performed, rebased, removed tabs)
2014-04-24 09:23:57 +02:00
David Härdeman
9fa1de965a Add more password agent information
Add an (optional) "Id" key in the password agent .ask files. The Id is
supposed to be a simple string in "<subsystem>:<target>" form which
is used to provide more information on what the requested passphrase
is to be used for (which e.g. allows an agent to only react to cryptsetup
requests).

(v2: rebased, fixed indentation, escape name, use strappenda)
2014-04-24 09:23:54 +02:00
Matthew Monaco
66aaf85e17 cryptsetup: copy value, not key for (rd.)luks.key 2014-04-19 23:38:14 -04:00
Lennart Poettering
ac1a87b9f2 cryptsetup: minor typo fix 2014-03-24 23:46:13 +01:00
Lennart Poettering
f75cac3746 cryptsetup: call static variables parsed from command line arg_XYZ like in all other tools 2014-03-13 00:46:58 +01:00
Lennart Poettering
c3834f9b88 generators: add Documentation= fields that point to the generator man pages 2014-03-06 18:48:22 +01:00
Lennart Poettering
059cb3858a util: move more intellegince into parse_proc_cmdline()
Already split variable assignments before invoking the callback. And
drop "rd." settings if we are not in an initrd.
2014-03-06 18:48:22 +01:00