--- /dev/null
- err = grub_util_fd_sector_seek (dev->cheat_fd, dev->cheat, sector);
+/*
+ * GRUB -- GRand Unified Bootloader
+ * Copyright (C) 2003,2007,2010,2011 Free Software Foundation, Inc.
+ *
+ * GRUB is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * GRUB is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with GRUB. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <grub/cryptodisk.h>
+#include <grub/mm.h>
+#include <grub/misc.h>
+#include <grub/dl.h>
+
+#ifdef GRUB_UTIL
+#include <errno.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <grub/emu/hostdisk.h>
+#include <unistd.h>
+#include <string.h>
+#endif
+
+GRUB_MOD_LICENSE ("GPLv3+");
+
+/* Our irreducible polynom is x^128+x^7+x^2+x+1. Lowest byte of it is: */
+#define GF_POLYNOM 0x87
+#define GF_PER_SECTOR (GRUB_DISK_SECTOR_SIZE / GRUB_CRYPTODISK_GF_BYTES)
+
+static grub_cryptodisk_t cryptodisk_list = NULL;
+static grub_uint8_t n = 0;
+
+static void
+gf_mul_x (grub_uint8_t *g)
+{
+ int over = 0, over2 = 0;
+ int j;
+
+ for (j = 0; j < GRUB_CRYPTODISK_GF_BYTES; j++)
+ {
+ over2 = !!(g[j] & 0x80);
+ g[j] <<= 1;
+ g[j] |= over;
+ over = over2;
+ }
+ if (over)
+ g[0] ^= GF_POLYNOM;
+}
+
+
+static void
+gf_mul_x_be (grub_uint8_t *g)
+{
+ int over = 0, over2 = 0;
+ int j;
+
+ for (j = GRUB_CRYPTODISK_GF_BYTES - 1; j >= 0; j--)
+ {
+ over2 = !!(g[j] & 0x80);
+ g[j] <<= 1;
+ g[j] |= over;
+ over = over2;
+ }
+ if (over)
+ g[GRUB_CRYPTODISK_GF_BYTES - 1] ^= GF_POLYNOM;
+}
+
+static void
+gf_mul_be (grub_uint8_t *o, const grub_uint8_t *a, const grub_uint8_t *b)
+{
+ int i;
+ grub_uint8_t t[GRUB_CRYPTODISK_GF_BYTES];
+ grub_memset (o, 0, GRUB_CRYPTODISK_GF_BYTES);
+ grub_memcpy (t, b, GRUB_CRYPTODISK_GF_BYTES);
+ for (i = 0; i < GRUB_CRYPTODISK_GF_SIZE; i++)
+ {
+ if (((a[GRUB_CRYPTODISK_GF_BYTES - i / 8 - 1] >> (i % 8))) & 1)
+ grub_crypto_xor (o, o, t, GRUB_CRYPTODISK_GF_BYTES);
+ gf_mul_x_be (t);
+ }
+}
+
+static gcry_err_code_t
+grub_crypto_pcbc_decrypt (grub_crypto_cipher_handle_t cipher,
+ void *out, void *in, grub_size_t size,
+ void *iv)
+{
+ grub_uint8_t *inptr, *outptr, *end;
+ grub_uint8_t ivt[cipher->cipher->blocksize];
+ if (!cipher->cipher->decrypt)
+ return GPG_ERR_NOT_SUPPORTED;
+ if (size % cipher->cipher->blocksize != 0)
+ return GPG_ERR_INV_ARG;
+ end = (grub_uint8_t *) in + size;
+ for (inptr = in, outptr = out; inptr < end;
+ inptr += cipher->cipher->blocksize, outptr += cipher->cipher->blocksize)
+ {
+ grub_memcpy (ivt, inptr, cipher->cipher->blocksize);
+ cipher->cipher->decrypt (cipher->ctx, outptr, inptr);
+ grub_crypto_xor (outptr, outptr, iv, cipher->cipher->blocksize);
+ grub_crypto_xor (iv, ivt, outptr, cipher->cipher->blocksize);
+ }
+ return GPG_ERR_NO_ERROR;
+}
+
+struct lrw_sector
+{
+ grub_uint8_t low[GRUB_CRYPTODISK_GF_BYTES];
+ grub_uint8_t high[GRUB_CRYPTODISK_GF_BYTES];
+ grub_uint8_t low_byte, low_byte_c;
+};
+
+static void
+generate_lrw_sector (struct lrw_sector *sec,
+ const struct grub_cryptodisk *dev,
+ const grub_uint8_t *iv)
+{
+ grub_uint8_t idx[GRUB_CRYPTODISK_GF_BYTES];
+ grub_uint16_t c;
+ int j;
+ grub_memcpy (idx, iv, GRUB_CRYPTODISK_GF_BYTES);
+ sec->low_byte = (idx[GRUB_CRYPTODISK_GF_BYTES - 1] & (GF_PER_SECTOR - 1));
+ sec->low_byte_c = (((GF_PER_SECTOR - 1) & ~sec->low_byte) + 1);
+ idx[GRUB_CRYPTODISK_GF_BYTES - 1] &= ~(GF_PER_SECTOR - 1);
+ gf_mul_be (sec->low, dev->lrw_key, idx);
+ if (!sec->low_byte)
+ return;
+
+ c = idx[GRUB_CRYPTODISK_GF_BYTES - 1] + GF_PER_SECTOR;
+ if (c & 0x100)
+ {
+ for (j = GRUB_CRYPTODISK_GF_BYTES - 2; j >= 0; j--)
+ {
+ idx[j]++;
+ if (idx[j] != 0)
+ break;
+ }
+ }
+ idx[GRUB_CRYPTODISK_GF_BYTES - 1] = c;
+ gf_mul_be (sec->high, dev->lrw_key, idx);
+}
+
+static void __attribute__ ((unused))
+lrw_xor (const struct lrw_sector *sec,
+ const struct grub_cryptodisk *dev,
+ grub_uint8_t *b)
+{
+ int i;
+
+ for (i = 0; i < sec->low_byte_c * GRUB_CRYPTODISK_GF_BYTES; i += GRUB_CRYPTODISK_GF_BYTES)
+ grub_crypto_xor (b + i, b + i, sec->low, GRUB_CRYPTODISK_GF_BYTES);
+ grub_crypto_xor (b, b, dev->lrw_precalc + GRUB_CRYPTODISK_GF_BYTES * sec->low_byte,
+ sec->low_byte_c * GRUB_CRYPTODISK_GF_BYTES);
+ if (!sec->low_byte)
+ return;
+
+ for (i = sec->low_byte_c * GRUB_CRYPTODISK_GF_BYTES;
+ i < GRUB_DISK_SECTOR_SIZE; i += GRUB_CRYPTODISK_GF_BYTES)
+ grub_crypto_xor (b + i, b + i, sec->high, GRUB_CRYPTODISK_GF_BYTES);
+ grub_crypto_xor (b + sec->low_byte_c * GRUB_CRYPTODISK_GF_BYTES,
+ b + sec->low_byte_c * GRUB_CRYPTODISK_GF_BYTES,
+ dev->lrw_precalc, sec->low_byte * GRUB_CRYPTODISK_GF_BYTES);
+}
+
+gcry_err_code_t
+grub_cryptodisk_decrypt (const struct grub_cryptodisk *dev,
+ grub_uint8_t * data, grub_size_t len,
+ grub_disk_addr_t sector)
+{
+ grub_size_t i;
+ gcry_err_code_t err;
+
+ /* The only mode without IV. */
+ if (dev->mode == GRUB_CRYPTODISK_MODE_ECB)
+ return grub_crypto_ecb_decrypt (dev->cipher, data, data, len);
+
+ for (i = 0; i < len; i += GRUB_DISK_SECTOR_SIZE)
+ {
+ grub_size_t sz = ((dev->cipher->cipher->blocksize
+ + sizeof (grub_uint32_t) - 1)
+ / sizeof (grub_uint32_t));
+ grub_uint32_t iv[sz];
+
+ grub_memset (iv, 0, sz * sizeof (iv[0]));
+ switch (dev->mode_iv)
+ {
+ case GRUB_CRYPTODISK_MODE_IV_NULL:
+ break;
+ case GRUB_CRYPTODISK_MODE_IV_BYTECOUNT64_HASH:
+ {
+ grub_uint64_t tmp;
+ grub_uint64_t ctx[(dev->iv_hash->contextsize + 7) / 8];
+
+ grub_memset (ctx, 0, sizeof (ctx));
+
+ tmp = grub_cpu_to_le64 (sector << GRUB_DISK_SECTOR_BITS);
+ dev->iv_hash->init (ctx);
+ dev->iv_hash->write (ctx, dev->iv_prefix, dev->iv_prefix_len);
+ dev->iv_hash->write (ctx, &tmp, sizeof (tmp));
+ dev->iv_hash->final (ctx);
+
+ grub_memcpy (iv, dev->iv_hash->read (ctx), sizeof (iv));
+ }
+ break;
+ case GRUB_CRYPTODISK_MODE_IV_PLAIN64:
+ iv[1] = grub_cpu_to_le32 (sector >> 32);
+ case GRUB_CRYPTODISK_MODE_IV_PLAIN:
+ iv[0] = grub_cpu_to_le32 (sector & 0xFFFFFFFF);
+ break;
+ case GRUB_CRYPTODISK_MODE_IV_BENBI:
+ {
+ grub_uint64_t num = (sector << dev->benbi_log) + 1;
+ iv[sz - 2] = grub_cpu_to_be32 (num >> 32);
+ iv[sz - 1] = grub_cpu_to_be32 (num & 0xFFFFFFFF);
+ }
+ break;
+ case GRUB_CRYPTODISK_MODE_IV_ESSIV:
+ iv[0] = grub_cpu_to_le32 (sector & 0xFFFFFFFF);
+ err = grub_crypto_ecb_encrypt (dev->essiv_cipher, iv, iv,
+ dev->cipher->cipher->blocksize);
+ if (err)
+ return err;
+ }
+
+ switch (dev->mode)
+ {
+ case GRUB_CRYPTODISK_MODE_CBC:
+ err = grub_crypto_cbc_decrypt (dev->cipher, data + i, data + i,
+ GRUB_DISK_SECTOR_SIZE, iv);
+ if (err)
+ return err;
+ break;
+
+ case GRUB_CRYPTODISK_MODE_PCBC:
+ err = grub_crypto_pcbc_decrypt (dev->cipher, data + i, data + i,
+ GRUB_DISK_SECTOR_SIZE, iv);
+ if (err)
+ return err;
+ break;
+ case GRUB_CRYPTODISK_MODE_XTS:
+ {
+ int j;
+ err = grub_crypto_ecb_encrypt (dev->secondary_cipher, iv, iv,
+ dev->cipher->cipher->blocksize);
+ if (err)
+ return err;
+
+ for (j = 0; j < GRUB_DISK_SECTOR_SIZE;
+ j += dev->cipher->cipher->blocksize)
+ {
+ grub_crypto_xor (data + i + j, data + i + j, iv,
+ dev->cipher->cipher->blocksize);
+ err = grub_crypto_ecb_decrypt (dev->cipher, data + i + j,
+ data + i + j,
+ dev->cipher->cipher->blocksize);
+ if (err)
+ return err;
+ grub_crypto_xor (data + i + j, data + i + j, iv,
+ dev->cipher->cipher->blocksize);
+ gf_mul_x ((grub_uint8_t *) iv);
+ }
+ }
+ break;
+ case GRUB_CRYPTODISK_MODE_LRW:
+ {
+ struct lrw_sector sec;
+
+ generate_lrw_sector (&sec, dev, (grub_uint8_t *) iv);
+ lrw_xor (&sec, dev, data + i);
+
+ err = grub_crypto_ecb_decrypt (dev->cipher, data + i,
+ data + i, GRUB_DISK_SECTOR_SIZE);
+ if (err)
+ return err;
+ lrw_xor (&sec, dev, data + i);
+ }
+ break;
+ default:
+ return GPG_ERR_NOT_IMPLEMENTED;
+ }
+ sector++;
+ }
+ return GPG_ERR_NO_ERROR;
+}
+
+gcry_err_code_t
+grub_cryptodisk_setkey (grub_cryptodisk_t dev, grub_uint8_t *key, grub_size_t keysize)
+{
+ gcry_err_code_t err;
+ int real_keysize;
+
+ real_keysize = keysize;
+ if (dev->mode == GRUB_CRYPTODISK_MODE_XTS)
+ real_keysize /= 2;
+ if (dev->mode == GRUB_CRYPTODISK_MODE_LRW)
+ real_keysize -= dev->cipher->cipher->blocksize;
+
+ /* Set the PBKDF2 output as the cipher key. */
+ err = grub_crypto_cipher_set_key (dev->cipher, key, real_keysize);
+ if (err)
+ return err;
+
+ /* Configure ESSIV if necessary. */
+ if (dev->mode_iv == GRUB_CRYPTODISK_MODE_IV_ESSIV)
+ {
+ grub_size_t essiv_keysize = dev->essiv_hash->mdlen;
+ grub_uint8_t hashed_key[essiv_keysize];
+
+ grub_crypto_hash (dev->essiv_hash, hashed_key, key, keysize);
+ err = grub_crypto_cipher_set_key (dev->essiv_cipher,
+ hashed_key, essiv_keysize);
+ if (err)
+ return err;
+ }
+ if (dev->mode == GRUB_CRYPTODISK_MODE_XTS)
+ {
+ err = grub_crypto_cipher_set_key (dev->secondary_cipher,
+ key + real_keysize,
+ keysize / 2);
+ if (err)
+ return err;
+ }
+
+ if (dev->mode == GRUB_CRYPTODISK_MODE_LRW)
+ {
+ int i;
+ grub_uint8_t idx[GRUB_CRYPTODISK_GF_BYTES];
+
+ grub_free (dev->lrw_precalc);
+ grub_memcpy (dev->lrw_key, key + real_keysize,
+ dev->cipher->cipher->blocksize);
+ dev->lrw_precalc = grub_malloc (GRUB_DISK_SECTOR_SIZE);
+ if (!dev->lrw_precalc)
+ return GPG_ERR_OUT_OF_MEMORY;
+ grub_memset (idx, 0, GRUB_CRYPTODISK_GF_BYTES);
+ for (i = 0; i < GRUB_DISK_SECTOR_SIZE;
+ i += GRUB_CRYPTODISK_GF_BYTES)
+ {
+ idx[GRUB_CRYPTODISK_GF_BYTES - 1] = i / GRUB_CRYPTODISK_GF_BYTES;
+ gf_mul_be (dev->lrw_precalc + i, idx, dev->lrw_key);
+ }
+ }
+ return GPG_ERR_NO_ERROR;
+}
+
+static int
+grub_cryptodisk_iterate (int (*hook) (const char *name),
+ grub_disk_pull_t pull)
+{
+ grub_cryptodisk_t i;
+
+ if (pull != GRUB_DISK_PULL_NONE)
+ return 0;
+
+ for (i = cryptodisk_list; i != NULL; i = i->next)
+ {
+ char buf[30];
+ grub_snprintf (buf, sizeof (buf), "crypto%lu", i->id);
+ if (hook (buf))
+ return 1;
+ }
+
+ return GRUB_ERR_NONE;
+}
+
+static grub_err_t
+grub_cryptodisk_open (const char *name, grub_disk_t disk,
+ grub_disk_pull_t pull __attribute__ ((unused)))
+{
+ grub_cryptodisk_t dev;
+
+ if (grub_memcmp (name, "crypto", sizeof ("crypto") - 1) != 0)
+ return grub_error (GRUB_ERR_UNKNOWN_DEVICE, "No such device");
+
+ if (grub_memcmp (name, "cryptouuid/", sizeof ("cryptouuid/") - 1) == 0)
+ {
+ for (dev = cryptodisk_list; dev != NULL; dev = dev->next)
+ if (grub_strcasecmp (name + sizeof ("cryptouuid/") - 1, dev->uuid) == 0)
+ break;
+ }
+ else
+ {
+ unsigned long id = grub_strtoul (name + sizeof ("crypto") - 1, 0, 0);
+ if (grub_errno)
+ return grub_error (GRUB_ERR_UNKNOWN_DEVICE, "No such device");
+ /* Search for requested device in the list of CRYPTODISK devices. */
+ for (dev = cryptodisk_list; dev != NULL; dev = dev->next)
+ if (dev->id == id)
+ break;
+ }
+ if (!dev)
+ return grub_error (GRUB_ERR_UNKNOWN_DEVICE, "No such device");
+
+#ifdef GRUB_UTIL
+ if (dev->cheat)
+ {
+ if (dev->cheat_fd == -1)
+ dev->cheat_fd = open (dev->cheat, O_RDONLY);
+ if (dev->cheat_fd == -1)
+ return grub_error (GRUB_ERR_IO, "couldn't open %s: %s",
+ dev->cheat, strerror (errno));
+ }
+#endif
+
+ if (!dev->source_disk)
+ {
+ grub_dprintf ("cryptodisk", "Opening device %s\n", name);
+ /* Try to open the source disk and populate the requested disk. */
+ dev->source_disk = grub_disk_open (dev->source);
+ if (!dev->source_disk)
+ return grub_errno;
+ }
+
+ disk->data = dev;
+ disk->total_sectors = dev->total_length;
+ disk->id = dev->id;
+ dev->ref++;
+ return GRUB_ERR_NONE;
+}
+
+static void
+grub_cryptodisk_close (grub_disk_t disk)
+{
+ grub_cryptodisk_t dev = (grub_cryptodisk_t) disk->data;
+ grub_dprintf ("cryptodisk", "Closing disk\n");
+
+ dev->ref--;
+
+ if (dev->ref != 0)
+ return;
+#ifdef GRUB_UTIL
+ if (dev->cheat)
+ {
+ close (dev->cheat_fd);
+ dev->cheat_fd = -1;
+ }
+#endif
+ grub_disk_close (dev->source_disk);
+ dev->source_disk = NULL;
+}
+
+static grub_err_t
+grub_cryptodisk_read (grub_disk_t disk, grub_disk_addr_t sector,
+ grub_size_t size, char *buf)
+{
+ grub_cryptodisk_t dev = (grub_cryptodisk_t) disk->data;
+ grub_err_t err;
+ gcry_err_code_t gcry_err;
+
+#ifdef GRUB_UTIL
+ if (dev->cheat)
+ {
- if (grub_util_fd_read (dev->cheat_fd, buf, size << GRUB_DISK_SECTOR_BITS)
- != (ssize_t) (size << GRUB_DISK_SECTOR_BITS))
++ err = grub_util_fd_seek (dev->cheat_fd, dev->cheat,
++ sector << disk->log_sector_size);
+ if (err)
+ return err;
- err = grub_disk_read (dev->source_disk, sector + dev->offset, 0,
- size << GRUB_DISK_SECTOR_BITS, buf);
++ if (grub_util_fd_read (dev->cheat_fd, buf, size << disk->log_sector_size)
++ != (ssize_t) (size << disk->log_sector_size))
+ return grub_error (GRUB_ERR_READ_ERROR, "cannot read from `%s'",
+ dev->cheat);
+ return GRUB_ERR_NONE;
+ }
+#endif
+
+ grub_dprintf ("cryptodisk",
+ "Reading %" PRIuGRUB_SIZE " sectors from sector 0x%"
+ PRIxGRUB_UINT64_T " with offset of %" PRIuGRUB_UINT64_T "\n",
+ size, sector, dev->offset);
+
- size << GRUB_DISK_SECTOR_BITS,
++ err = grub_disk_read (dev->source_disk,
++ (sector << (disk->log_sector_size
++ - GRUB_DISK_SECTOR_BITS)) + dev->offset, 0,
++ size << disk->log_sector_size, buf);
+ if (err)
+ {
+ grub_dprintf ("cryptodisk", "grub_disk_read failed with error %d\n", err);
+ return err;
+ }
+ gcry_err = grub_cryptodisk_decrypt (dev, (grub_uint8_t *) buf,
++ size << disk->log_sector_size,
+ sector);
+ return grub_crypto_gcry_error (gcry_err);
+}
+
+static grub_err_t
+grub_cryptodisk_write (grub_disk_t disk __attribute ((unused)),
+ grub_disk_addr_t sector __attribute ((unused)),
+ grub_size_t size __attribute ((unused)),
+ const char *buf __attribute ((unused)))
+{
+ return GRUB_ERR_NOT_IMPLEMENTED_YET;
+}
+
+#ifdef GRUB_UTIL
+static grub_disk_memberlist_t
+grub_cryptodisk_memberlist (grub_disk_t disk)
+{
+ grub_cryptodisk_t dev = (grub_cryptodisk_t) disk->data;
+ grub_disk_memberlist_t list = NULL;
+
+ list = grub_malloc (sizeof (*list));
+ if (list)
+ {
+ list->disk = dev->source_disk;
+ list->next = NULL;
+ }
+
+ return list;
+}
+#endif
+
+static void
+cryptodisk_cleanup (void)
+{
+ grub_cryptodisk_t dev = cryptodisk_list;
+ grub_cryptodisk_t tmp;
+
+ while (dev != NULL)
+ {
+ grub_free (dev->source);
+ grub_free (dev->cipher);
+ grub_free (dev->secondary_cipher);
+ grub_free (dev->essiv_cipher);
+ tmp = dev->next;
+ grub_free (dev);
+ dev = tmp;
+ }
+}
+
+grub_err_t
+grub_cryptodisk_insert (grub_cryptodisk_t newdev, const char *name,
+ grub_disk_t source)
+{
+ newdev->source = grub_strdup (name);
+ if (!newdev->source)
+ {
+ grub_free (newdev);
+ return grub_errno;
+ }
+
+ newdev->id = n++;
+ newdev->source_id = source->id;
+ newdev->source_dev_id = source->dev->id;
+ newdev->next = cryptodisk_list;
+ cryptodisk_list = newdev;
+
+ return GRUB_ERR_NONE;
+}
+
+grub_cryptodisk_t
+grub_cryptodisk_get_by_uuid (const char *uuid)
+{
+ grub_cryptodisk_t dev;
+ for (dev = cryptodisk_list; dev != NULL; dev = dev->next)
+ if (grub_strcasecmp (dev->uuid, uuid) == 0)
+ return dev;
+ return NULL;
+}
+
+grub_cryptodisk_t
+grub_cryptodisk_get_by_source_disk (grub_disk_t disk)
+{
+ grub_cryptodisk_t dev;
+ for (dev = cryptodisk_list; dev != NULL; dev = dev->next)
+ if (dev->source_id == disk->id && dev->source_dev_id == disk->dev->id)
+ return dev;
+ return NULL;
+}
+
+#ifdef GRUB_UTIL
+grub_err_t
+grub_cryptodisk_cheat_insert (grub_cryptodisk_t newdev, const char *name,
+ grub_disk_t source, const char *cheat)
+{
+ newdev->cheat = grub_strdup (cheat);
+ newdev->source = grub_strdup (name);
+ if (!newdev->source || !newdev->cheat)
+ {
+ grub_free (newdev->source);
+ grub_free (newdev->cheat);
+ return grub_errno;
+ }
+
+ newdev->cheat_fd = -1;
+ newdev->source_id = source->id;
+ newdev->source_dev_id = source->dev->id;
+ newdev->id = n++;
+ newdev->next = cryptodisk_list;
+ cryptodisk_list = newdev;
+
+ return GRUB_ERR_NONE;
+}
+
+void
+grub_util_cryptodisk_print_abstraction (grub_disk_t disk)
+{
+ grub_cryptodisk_t dev = (grub_cryptodisk_t) disk->data;
+
+ grub_printf ("luks ");
+
+ if (dev->cipher)
+ grub_printf ("%s ", dev->cipher->cipher->modname);
+ if (dev->secondary_cipher)
+ grub_printf ("%s ", dev->secondary_cipher->cipher->modname);
+ if (dev->essiv_cipher)
+ grub_printf ("%s ", dev->essiv_cipher->cipher->modname);
+ if (dev->hash)
+ grub_printf ("%s ", dev->hash->modname);
+ if (dev->essiv_hash)
+ grub_printf ("%s ", dev->essiv_hash->modname);
+ if (dev->iv_hash)
+ grub_printf ("%s ", dev->iv_hash->modname);
+}
+#endif
+
+static struct grub_disk_dev grub_cryptodisk_dev = {
+ .name = "cryptodisk",
+ .id = GRUB_DISK_DEVICE_CRYPTODISK_ID,
+ .iterate = grub_cryptodisk_iterate,
+ .open = grub_cryptodisk_open,
+ .close = grub_cryptodisk_close,
+ .read = grub_cryptodisk_read,
+ .write = grub_cryptodisk_write,
+#ifdef GRUB_UTIL
+ .memberlist = grub_cryptodisk_memberlist,
+#endif
+ .next = 0
+};
+
+GRUB_MOD_INIT (cryptodisk)
+{
+ grub_disk_dev_register (&grub_cryptodisk_dev);
+}
+
+GRUB_MOD_FINI (cryptodisk)
+{
+ grub_disk_dev_unregister (&grub_cryptodisk_dev);
+ cryptodisk_cleanup ();
+}
}
#endif /* __linux__ */
- grub_util_fd_sector_seek (int fd, const char *name, grub_disk_addr_t sector)
+#if defined(__linux__) && (!defined(__GLIBC__) || \
+ ((__GLIBC__ < 2) || ((__GLIBC__ == 2) && (__GLIBC_MINOR__ < 1))))
+ /* Maybe libc doesn't have large file support. */
+grub_err_t
- offset = (loff_t) sector << GRUB_DISK_SECTOR_BITS;
++grub_util_fd_seek (int fd, const char *name, grub_uint64_t off)
+{
+ loff_t offset, result;
+ static int _llseek (uint filedes, ulong hi, ulong lo,
+ loff_t *res, uint wh);
+ _syscall5 (int, _llseek, uint, filedes, ulong, hi, ulong, lo,
+ loff_t *, res, uint, wh);
+
- grub_util_fd_sector_seek (int fd, const char *name, grub_disk_addr_t sector)
++ offset = (loff_t) off;
+ if (_llseek (fd, offset >> 32, offset & 0xffffffff, &result, SEEK_SET))
+ {
+ return grub_error (GRUB_ERR_BAD_DEVICE, "cannot seek `%s'", name);
+ }
+ return GRUB_ERR_NONE;
+}
+#else
+grub_err_t
- off_t offset = (off_t) sector << GRUB_DISK_SECTOR_BITS;
++grub_util_fd_seek (int fd, const char *name, grub_uint64_t off)
+{
++ off_t offset = (off_t) off;
+
+ if (lseek (fd, offset, SEEK_SET) != offset)
+ return grub_error (GRUB_ERR_BAD_DEVICE, "cannot seek `%s'", name);
+ return 0;
+}
+#endif
+
static int
open_device (const grub_disk_t disk, grub_disk_addr_t sector, int flags)
{
configure_device_driver (fd);
#endif /* defined(__NetBSD__) */
- if (grub_util_fd_sector_seek (fd, map[disk->id].device, sector))
-#if defined(__linux__) && (!defined(__GLIBC__) || \
- ((__GLIBC__ < 2) || ((__GLIBC__ == 2) && (__GLIBC_MINOR__ < 1))))
- /* Maybe libc doesn't have large file support. */
- {
- loff_t offset, result;
- static int _llseek (uint filedes, ulong hi, ulong lo,
- loff_t *res, uint wh);
- _syscall5 (int, _llseek, uint, filedes, ulong, hi, ulong, lo,
- loff_t *, res, uint, wh);
-
- offset = (loff_t) sector << disk->log_sector_size;
- if (_llseek (fd, offset >> 32, offset & 0xffffffff, &result, SEEK_SET))
- {
- grub_error (GRUB_ERR_BAD_DEVICE, "cannot seek `%s'", map[disk->id].device);
- close (fd);
- return -1;
- }
- }
-#else
- {
- off_t offset = (off_t) sector << disk->log_sector_size;
-
- if (lseek (fd, offset, SEEK_SET) != offset)
- {
- grub_error (GRUB_ERR_BAD_DEVICE, "cannot seek `%s'", map[disk->id].device);
- close (fd);
- return -1;
- }
- }
-#endif
++ if (grub_util_fd_seek (fd, map[disk->id].device,
++ sector << disk->log_sector_size))
+ {
+ close (fd);
+ return -1;
+ }
return fd;
}
sectors that are read together with the MBR in one read. It
should only remap the MBR, so we split the read in two
parts. -jochen */
- if (grub_util_fd_read (fd, buf, GRUB_DISK_SECTOR_SIZE)
- != GRUB_DISK_SECTOR_SIZE)
- if (nread (fd, buf, (1 << disk->log_sector_size))
++ if (grub_util_fd_read (fd, buf, (1 << disk->log_sector_size))
+ != (1 << disk->log_sector_size))
{
grub_error (GRUB_ERR_READ_ERROR, "cannot read `%s'", map[disk->id].device);
- close (fd);
return grub_errno;
}
}
#endif /* __linux__ */
- if (grub_util_fd_read (fd, buf, size << GRUB_DISK_SECTOR_BITS)
- != (ssize_t) (size << GRUB_DISK_SECTOR_BITS))
- if (nread (fd, buf, size << disk->log_sector_size)
++ if (grub_util_fd_read (fd, buf, size << disk->log_sector_size)
+ != (ssize_t) (size << disk->log_sector_size))
grub_error (GRUB_ERR_READ_ERROR, "cannot read from `%s'", map[disk->id].device);
return grub_errno;
projects / thirdparty / grub.git / commitdiff
