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Create LUKS header file in luksFormat if it does not exist.

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This commit is contained in:
Milan Broz
2017-10-10 13:52:50 +02:00
parent e1ed664adc
commit b42d183b08
9 changed files with 57 additions and 12 deletions
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21
src/cryptsetup.c
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@@ -929,7 +929,8 @@ static int _wipe_data_device(struct crypt_device *cd)
static int action_luksFormat(void)
{
int r = -EINVAL, keysize, integrity_keysize = 0, luks_version;
int r = -EINVAL, keysize, integrity_keysize = 0, luks_version, fd;
struct stat st;
const char *header_device;
char *msg = NULL, *key = NULL, *password = NULL;
char cipher [MAX_CIPHER_LEN], cipher_mode[MAX_CIPHER_LEN], integrity[MAX_CIPHER_LEN];
@@ -960,6 +961,24 @@ static int action_luksFormat(void)
return -EINVAL;
}
/* Create header file (must contain at least one sector)? */
if (opt_header_device && stat(opt_header_device, &st) < 0 && errno == ENOENT) {
if (!opt_batch_mode &&
!yesDialog("Header file does not exist, do you want to create it?", NULL))
return -EPERM;
log_dbg("Creating header file.");
fd = open(opt_header_device, O_CREAT|O_EXCL|O_WRONLY, S_IRUSR|S_IWUSR);
if (fd == -1 || posix_fallocate(fd, 0, 4096))
log_err(_("Cannot create header file %s.\n"), opt_header_device);
else
r = 0;
if (fd != -1)
close(fd);
if (r < 0)
return r;
}
header_device = opt_header_device ?: action_argv[0];
if(asprintf(&msg, _("This will overwrite data on %s irrevocably."),