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Add --without-activation option for luksOpen (check passphrase only).

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This commit is contained in:
Milan Broz
2012-06-19 15:34:36 +02:00
parent c4a533c3d5
commit a38fcafcff
4 changed files with 23 additions and 5 deletions
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2
ChangeLog
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@@ -1,5 +1,7 @@
2012-06-18 Milan Broz <gmazyland@gmail.com>
* Introduce cryptsetup-reencrypt - experimental offline LUKS reencryption tool.
* Fix luks-header-from-active script (do not use LUKS header on-disk, add UUID).
* Add --without-activation option for luksOpen (check passphrase only).
2012-06-11 Milan Broz <gmazyland@gmail.com>
* Introduce veritysetup for dm-verity target management.

6
man/cryptsetup.8
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@@ -144,7 +144,7 @@ The <device> parameter can be also specified by LUKS UUID in the
format UUID=<uuid>, which uses the symlinks in /dev/disk/by-uuid.
\fB<options>\fR can be [\-\-key-file, \-\-keyfile-offset,
\-\-keyfile-size, \-\-readonly,
\-\-keyfile-size, \-\-readonly, \-\-without-activation,
\-\-allow-discards, \-\-header, \-\-key-slot, \-\-master-key-file].
.PP
\fIluksClose\fR <name>
@@ -613,6 +613,10 @@ later. If in doubt, do no use it.
A kernel version of 3.1 or later is needed. For earlier kernels
this option is ignored.
.TP
.B "\-\-without-activation\fR"
Do not activate device, just verify passphrase.
This option is only relevant for \fIluksOpen\fR.
.TP
.B "\-\-header\fR <device or file storing the LUKS header>"
Use a detached (separated) metadata device or file where the
LUKS header is stored. This options allows to store ciphertext

18
src/cryptsetup.c
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@@ -68,6 +68,7 @@ static int opt_urandom = 0;
static int opt_dump_master_key = 0;
static int opt_shared = 0;
static int opt_allow_discards = 0;
static int opt_without_activation = 0;
static const char **action_argv;
static int action_argc;
@@ -628,7 +629,7 @@ out:
static int action_luksOpen(int arg __attribute__((unused)))
{
struct crypt_device *cd = NULL;
const char *data_device, *header_device;
const char *data_device, *header_device, *activated_name;
char *key = NULL;
uint32_t flags = 0;
int r, keysize;
@@ -641,6 +642,8 @@ static int action_luksOpen(int arg __attribute__((unused)))
data_device = NULL;
}
activated_name = opt_without_activation ? NULL : action_argv[1];
if ((r = crypt_init(&cd, header_device)))
goto out;
@@ -675,15 +678,15 @@ static int action_luksOpen(int arg __attribute__((unused)))
r = _read_mk(opt_master_key_file, &key, keysize);
if (r < 0)
goto out;
r = crypt_activate_by_volume_key(cd, action_argv[1],
r = crypt_activate_by_volume_key(cd, activated_name,
key, keysize, flags);
} else if (opt_key_file) {
crypt_set_password_retry(cd, 1);
r = crypt_activate_by_keyfile_offset(cd, action_argv[1],
r = crypt_activate_by_keyfile_offset(cd, activated_name,
opt_key_slot, opt_key_file, opt_keyfile_size,
opt_keyfile_offset, flags);
} else
r = crypt_activate_by_passphrase(cd, action_argv[1],
r = crypt_activate_by_passphrase(cd, activated_name,
opt_key_slot, NULL, 0, flags);
out:
crypt_safe_free(key);
@@ -1304,6 +1307,7 @@ int main(int argc, const char **argv)
{ "uuid", '\0', POPT_ARG_STRING, &opt_uuid, 0, N_("UUID for device to use."), NULL },
{ "allow-discards", '\0', POPT_ARG_NONE, &opt_allow_discards, 0, N_("Allow discards (aka TRIM) requests for device."), NULL },
{ "header", '\0', POPT_ARG_STRING, &opt_header_device, 0, N_("Device or file with separated LUKS header."), NULL },
{ "without-activation",'\0', POPT_ARG_NONE, &opt_without_activation, 0, N_("Do not activate device, just check passphrase."), NULL },
POPT_TABLEEND
};
poptContext popt_context;
@@ -1415,6 +1419,12 @@ int main(int argc, const char **argv)
poptGetInvocationName(popt_context));
}
if (opt_without_activation &&
strcmp(aname, "luksOpen"))
usage(popt_context, EXIT_FAILURE,
_("Option --without-activation is allowed only for luksOpen.\n"),
poptGetInvocationName(popt_context));
if (opt_key_size % 8)
usage(popt_context, EXIT_FAILURE,
_("Key size must be a multiple of 8 bits"),

2
tests/compat-test
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@@ -158,6 +158,8 @@ echo "key0" | $CRYPTSETUP -i 1000 -h sha512 -c aes-cbc-essiv:sha256 -s 128 luksF
check "$LUKS_HEADER $KEY_SLOT0 $KEY_MATERIAL0"
prepare "[5] open"
echo "key0" | $CRYPTSETUP luksOpen $LOOPDEV $DEV_NAME --without-activation || fail
echo "blah" | $CRYPTSETUP luksOpen $LOOPDEV $DEV_NAME --without-activation 2>/dev/null && fail
echo "key0" | $CRYPTSETUP luksOpen $LOOPDEV $DEV_NAME || fail
check_exists