From a613c3ea1106ce4dc1e44f88665d14259b659da8 Mon Sep 17 00:00:00 2001
From: Vladimir 'phcoder' Serbinenko <phcoder@gmail.com>
Date: Sun, 24 Mar 2013 13:05:59 +0100
Subject: [PATCH 226/364] Add new 'proc' filesystem framework and put
luks_script into it.
---
ChangeLog | 4 ++
Makefile.util.def | 1 +
grub-core/Makefile.core.def | 5 ++
grub-core/disk/cryptodisk.c | 113 +++++++++++++++++++++++++++++
grub-core/disk/geli.c | 2 -
grub-core/disk/luks.c | 2 -
grub-core/fs/proc.c | 172 ++++++++++++++++++++++++++++++++++++++++++++
include/grub/cryptodisk.h | 5 +-
include/grub/disk.h | 1 +
include/grub/procfs.h | 50 +++++++++++++
10 files changed, 350 insertions(+), 5 deletions(-)
create mode 100644 grub-core/fs/proc.c
create mode 100644 include/grub/procfs.h
diff --git a/ChangeLog b/ChangeLog
index 9841659..8f3878d 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+2013-03-24 Vladimir Serbinenko <phcoder@gmail.com>
+
+ Add new 'proc' filesystem framework and put luks_script into it.
+
2013-03-23 Vladimir Serbinenko <phcoder@gmail.com>
* grub-core/term/at_keyboard.c: Increase robustness on coreboot
diff --git a/Makefile.util.def b/Makefile.util.def
index 1ccf390..62bcf2d 100644
--- a/Makefile.util.def
+++ b/Makefile.util.def
@@ -33,6 +33,7 @@ library = {
common = grub-core/disk/diskfilter.c;
common = grub-core/partmap/gpt.c;
common = grub-core/partmap/msdos.c;
+ common = grub-core/fs/proc.c;
};
library = {
diff --git a/grub-core/Makefile.core.def b/grub-core/Makefile.core.def
index a614b22..b1c1ab9 100644
--- a/grub-core/Makefile.core.def
+++ b/grub-core/Makefile.core.def
@@ -1068,6 +1068,11 @@ module = {
};
module = {
+ name = procfs;
+ common = fs/proc.c;
+};
+
+module = {
name = affs;
common = fs/affs.c;
};
diff --git a/grub-core/disk/cryptodisk.c b/grub-core/disk/cryptodisk.c
index f39c1ab..374edd1 100644
--- a/grub-core/disk/cryptodisk.c
+++ b/grub-core/disk/cryptodisk.c
@@ -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);
}
diff --git a/grub-core/disk/geli.c b/grub-core/disk/geli.c
index f9315df..0b94414 100644
--- a/grub-core/disk/geli.c
+++ b/grub-core/disk/geli.c
@@ -381,9 +381,7 @@ configure_ciphers (grub_disk_t disk, const char *check_uuid,
newdev->rekey_shift = 20;
}
-#ifdef GRUB_UTIL
newdev->modname = "geli";
-#endif
newdev->total_length = grub_disk_get_size (disk) - 1;
grub_memcpy (newdev->uuid, uuid, sizeof (newdev->uuid));
diff --git a/grub-core/disk/luks.c b/grub-core/disk/luks.c
index 44f3cac..afcb7e4 100644
--- a/grub-core/disk/luks.c
+++ b/grub-core/disk/luks.c
@@ -290,9 +290,7 @@ configure_ciphers (grub_disk_t disk, const char *check_uuid,
newdev->log_sector_size = 9;
newdev->total_length = grub_disk_get_size (disk) - newdev->offset;
grub_memcpy (newdev->uuid, uuid, sizeof (newdev->uuid));
-#ifdef GRUB_UTIL
newdev->modname = "luks";
-#endif
COMPILE_TIME_ASSERT (sizeof (newdev->uuid) >= sizeof (uuid));
return newdev;
}
diff --git a/grub-core/fs/proc.c b/grub-core/fs/proc.c
new file mode 100644
index 0000000..8f27682
--- /dev/null
+++ b/grub-core/fs/proc.c
@@ -0,0 +1,172 @@
+/*
+ * GRUB -- GRand Unified Bootloader
+ * Copyright (C) 2013 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/procfs.h>
+#include <grub/disk.h>
+#include <grub/fs.h>
+#include <grub/file.h>
+#include <grub/mm.h>
+#include <grub/dl.h>
+
+GRUB_MOD_LICENSE ("GPLv3+");
+
+struct grub_procfs_entry *grub_procfs_entries;
+
+static int
+grub_procdev_iterate (grub_disk_dev_iterate_hook_t hook, void *hook_data,
+ grub_disk_pull_t pull)
+{
+ if (pull != GRUB_DISK_PULL_NONE)
+ return 0;
+
+ return hook ("proc", hook_data);
+}
+
+static grub_err_t
+grub_procdev_open (const char *name, grub_disk_t disk)
+{
+ if (grub_strcmp (name, "proc"))
+ return grub_error (GRUB_ERR_UNKNOWN_DEVICE, "not a procfs disk");
+
+ disk->total_sectors = 0;
+ disk->id = (unsigned long) "proc";
+
+ disk->data = 0;
+
+ return GRUB_ERR_NONE;
+}
+
+static void
+grub_procdev_close (grub_disk_t disk __attribute((unused)))
+{
+}
+
+static grub_err_t
+grub_procdev_read (grub_disk_t disk __attribute((unused)),
+ grub_disk_addr_t sector __attribute((unused)),
+ grub_size_t size __attribute((unused)),
+ char *buf __attribute((unused)))
+{
+ return GRUB_ERR_OUT_OF_RANGE;
+}
+
+static grub_err_t
+grub_procdev_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_OUT_OF_RANGE;
+}
+
+static grub_ssize_t
+grub_procfs_read (grub_file_t file, char *buf, grub_size_t len)
+{
+ char *data = file->data;
+
+ grub_memcpy (buf, data + file->offset, len);
+
+ return len;
+}
+
+static grub_err_t
+grub_procfs_close (grub_file_t file)
+{
+ char *data;
+
+ data = file->data;
+ grub_free (data);
+
+ return GRUB_ERR_NONE;
+}
+
+static grub_err_t
+grub_procfs_dir (grub_device_t device, const char *path,
+ grub_fs_dir_hook_t hook, void *hook_data)
+{
+ const char *ptr;
+ struct grub_dirhook_info info;
+ struct grub_procfs_entry *entry;
+
+ grub_memset (&info, 0, sizeof (info));
+
+ /* Check if the disk is our dummy disk. */
+ if (grub_strcmp (device->disk->name, "proc"))
+ return grub_error (GRUB_ERR_BAD_FS, "not a procfs");
+ for (ptr = path; *ptr == '/'; ptr++);
+ if (*ptr)
+ return 0;
+ FOR_LIST_ELEMENTS((entry), (grub_procfs_entries))
+ if (hook (entry->name, &info, hook_data))
+ return 0;
+ return 0;
+}
+
+static grub_err_t
+grub_procfs_open (struct grub_file *file, const char *path)
+{
+ const char *pathptr;
+ struct grub_procfs_entry *entry;
+
+ for (pathptr = path; *pathptr == '/'; pathptr++);
+
+ FOR_LIST_ELEMENTS((entry), (grub_procfs_entries))
+ if (grub_strcmp (pathptr, entry->name) == 0)
+ {
+ file->data = entry->get_contents ();
+ if (!file->data)
+ return grub_errno;
+ file->size = grub_strlen (file->data);
+ return GRUB_ERR_NONE;
+ }
+
+ return grub_error (GRUB_ERR_FILE_NOT_FOUND, N_("file `%s' not found"), path);
+}
+
+static struct grub_disk_dev grub_procfs_dev = {
+ .name = "proc",
+ .id = GRUB_DISK_DEVICE_PROCFS_ID,
+ .iterate = grub_procdev_iterate,
+ .open = grub_procdev_open,
+ .close = grub_procdev_close,
+ .read = grub_procdev_read,
+ .write = grub_procdev_write,
+ .next = 0
+};
+
+static struct grub_fs grub_procfs_fs =
+ {
+ .name = "procfs",
+ .dir = grub_procfs_dir,
+ .open = grub_procfs_open,
+ .read = grub_procfs_read,
+ .close = grub_procfs_close,
+ .next = 0
+ };
+
+GRUB_MOD_INIT (procfs)
+{
+ grub_disk_dev_register (&grub_procfs_dev);
+ grub_fs_register (&grub_procfs_fs);
+}
+
+GRUB_MOD_FINI (procfs)
+{
+ grub_disk_dev_unregister (&grub_procfs_dev);
+ grub_fs_unregister (&grub_procfs_fs);
+}
diff --git a/include/grub/cryptodisk.h b/include/grub/cryptodisk.h
index 0bb5d44..c3ee820 100644
--- a/include/grub/cryptodisk.h
+++ b/include/grub/cryptodisk.h
@@ -49,6 +49,7 @@ typedef enum
#define GRUB_CRYPTODISK_GF_SIZE (1U << GRUB_CRYPTODISK_GF_LOG_SIZE)
#define GRUB_CRYPTODISK_GF_LOG_BYTES (GRUB_CRYPTODISK_GF_LOG_SIZE - 3)
#define GRUB_CRYPTODISK_GF_BYTES (1U << GRUB_CRYPTODISK_GF_LOG_BYTES)
+#define GRUB_CRYPTODISK_MAX_KEYLEN 128
struct grub_cryptodisk;
@@ -80,11 +81,13 @@ struct grub_cryptodisk
grub_uint8_t *lrw_precalc;
grub_uint8_t iv_prefix[64];
grub_size_t iv_prefix_len;
+ grub_uint8_t key[GRUB_CRYPTODISK_MAX_KEYLEN];
+ grub_size_t keysize;
#ifdef GRUB_UTIL
char *cheat;
- const char *modname;
int cheat_fd;
#endif
+ const char *modname;
int log_sector_size;
grub_cryptodisk_rekey_func_t rekey;
int rekey_shift;
diff --git a/include/grub/disk.h b/include/grub/disk.h
index f0e3df3..d19b1ac 100644
--- a/include/grub/disk.h
+++ b/include/grub/disk.h
@@ -43,6 +43,7 @@ enum grub_disk_dev_id
GRUB_DISK_DEVICE_CRYPTODISK_ID,
GRUB_DISK_DEVICE_ARCDISK_ID,
GRUB_DISK_DEVICE_HOSTDISK_ID,
+ GRUB_DISK_DEVICE_PROCFS_ID,
};
struct grub_disk;
diff --git a/include/grub/procfs.h b/include/grub/procfs.h
new file mode 100644
index 0000000..55cbb21
--- /dev/null
+++ b/include/grub/procfs.h
@@ -0,0 +1,50 @@
+/*
+ * GRUB -- GRand Unified Bootloader
+ * Copyright (C) 2013 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/>.
+ */
+
+#ifndef GRUB_PROCFS_HEADER
+#define GRUB_PROCFS_HEADER 1
+
+#include <grub/list.h>
+
+struct grub_procfs_entry
+{
+ struct grub_procfs_entry *next;
+ struct grub_procfs_entry **prev;
+
+ const char *name;
+ char * (*get_contents) (void);
+};
+
+extern struct grub_procfs_entry *grub_procfs_entries;
+
+static inline void
+grub_procfs_register (const char *name __attribute__ ((unused)),
+ struct grub_procfs_entry *entry)
+{
+ grub_list_push (GRUB_AS_LIST_P (&grub_procfs_entries),
+ GRUB_AS_LIST (entry));
+}
+
+static inline void
+grub_procfs_unregister (struct grub_procfs_entry *entry)
+{
+ grub_list_remove (GRUB_AS_LIST (entry));
+}
+
+
+#endif
--
1.8.1.4