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Add new 'proc' filesystem framework and put luks_script into it.

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This commit is contained in:
Vladimir 'phcoder' Serbinenko 2013-03-24 13:05:59 +01:00
parent d975e8d59c
commit ce50dbd746
10 changed files with 350 additions and 5 deletions
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113
grub-core/disk/cryptodisk.c
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@ -22,6 +22,9 @@
#include <grub/dl.h>
#include <grub/extcmd.h>
#include <grub/i18n.h>
#include <grub/fs.h>
#include <grub/file.h>
#include <grub/procfs.h>
#ifdef GRUB_UTIL
#include <errno.h>
@ -403,6 +406,8 @@ grub_cryptodisk_setkey (grub_cryptodisk_t dev, grub_uint8_t *key, grub_size_t ke
err = grub_crypto_cipher_set_key (dev->cipher, key, real_keysize);
if (err)
return err;
grub_memcpy (dev->key, key, keysize);
dev->keysize = keysize;
/* Configure ESSIV if necessary. */
if (dev->mode_iv == GRUB_CRYPTODISK_MODE_IV_ESSIV)
@ -979,6 +984,112 @@ static struct grub_disk_dev grub_cryptodisk_dev = {
.next = 0
};
static char
hex (grub_uint8_t val)
{
if (val < 10)
return '0' + val;
return 'a' + val - 10;
}
/* Open a file named NAME and initialize FILE. */
static char *
luks_script_get (void)
{
grub_cryptodisk_t i;
grub_size_t size = 0;
char *ptr, *ret;
for (i = cryptodisk_list; i != NULL; i = i->next)
if (grub_strcmp (i->modname, "luks") == 0)
{
size += sizeof ("luks_mount ");
size += grub_strlen (i->uuid);
size += grub_strlen (i->cipher->cipher->name);
size += 54;
if (i->essiv_hash)
size += grub_strlen (i->essiv_hash->name);
size += i->keysize * 2;
}
ret = grub_malloc (size + 1);
if (!ret)
return 0;
ptr = ret;
for (i = cryptodisk_list; i != NULL; i = i->next)
if (grub_strcmp (i->modname, "luks") == 0)
{
unsigned j;
const char *iptr;
ptr = grub_stpcpy (ptr, "luks_mount ");
ptr = grub_stpcpy (ptr, i->uuid);
*ptr++ = ' ';
grub_snprintf (ptr, 21, "%" PRIuGRUB_UINT64_T " ", i->offset);
while (*ptr)
ptr++;
for (iptr = i->cipher->cipher->name; *iptr; iptr++)
*ptr++ = grub_tolower (*iptr);
switch (i->mode)
{
case GRUB_CRYPTODISK_MODE_ECB:
ptr = grub_stpcpy (ptr, "-ecb");
break;
case GRUB_CRYPTODISK_MODE_CBC:
ptr = grub_stpcpy (ptr, "-cbc");
break;
case GRUB_CRYPTODISK_MODE_PCBC:
ptr = grub_stpcpy (ptr, "-pcbc");
break;
case GRUB_CRYPTODISK_MODE_XTS:
ptr = grub_stpcpy (ptr, "-xts");
break;
case GRUB_CRYPTODISK_MODE_LRW:
ptr = grub_stpcpy (ptr, "-lrw");
break;
}
switch (i->mode_iv)
{
case GRUB_CRYPTODISK_MODE_IV_NULL:
ptr = grub_stpcpy (ptr, "-null");
break;
case GRUB_CRYPTODISK_MODE_IV_PLAIN:
ptr = grub_stpcpy (ptr, "-plain");
break;
case GRUB_CRYPTODISK_MODE_IV_PLAIN64:
ptr = grub_stpcpy (ptr, "-plain64");
break;
case GRUB_CRYPTODISK_MODE_IV_BENBI:
ptr = grub_stpcpy (ptr, "-benbi");
break;
case GRUB_CRYPTODISK_MODE_IV_ESSIV:
ptr = grub_stpcpy (ptr, "-essiv:");
ptr = grub_stpcpy (ptr, i->essiv_hash->name);
break;
case GRUB_CRYPTODISK_MODE_IV_BYTECOUNT64:
case GRUB_CRYPTODISK_MODE_IV_BYTECOUNT64_HASH:
break;
}
*ptr++ = ' ';
for (j = 0; j < i->keysize; j++)
{
*ptr++ = hex (i->key[j] >> 4);
*ptr++ = hex (i->key[j] & 0xf);
}
*ptr++ = '\n';
}
*ptr = '\0';
return ret;
}
struct grub_procfs_entry luks_script =
{
.name = "luks_script",
.get_contents = luks_script_get
};
static grub_extcmd_t cmd;
GRUB_MOD_INIT (cryptodisk)
@ -987,10 +1098,12 @@ GRUB_MOD_INIT (cryptodisk)
cmd = grub_register_extcmd ("cryptomount", grub_cmd_cryptomount, 0,
N_("SOURCE|-u UUID|-a|-b"),
N_("Mount a crypto device."), options);
grub_procfs_register ("luks_script", &luks_script);
}
GRUB_MOD_FINI (cryptodisk)
{
grub_disk_dev_unregister (&grub_cryptodisk_dev);
cryptodisk_cleanup ();
grub_procfs_unregister (&luks_script);
}