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cryptodisk: teach grub_cryptodisk_insert() about partitions (bug #45889)

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It is not possible to configure encrypted containers on multiple partitions of
the same disk; after the first one all subsequent fail with

disk/cryptodisk.c:978: already mounted as crypto0

Store partition offset in cryptomount descriptor to distinguish between them.
This commit is contained in:
grub-devel@iam.tj 2015-11-07 18:52:59 +03:00 committed by Andrei Borzenkov
parent bcf8c5814d
commit c7f93a20c4
2 changed files with 7 additions and 1 deletions
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7
grub-core/disk/cryptodisk.c
View file

@ -25,6 +25,7 @@
#include <grub/fs.h>
#include <grub/file.h>
#include <grub/procfs.h>
#include <grub/partition.h>
#ifdef GRUB_UTIL
#include <grub/emu/hostdisk.h>
@ -718,6 +719,7 @@ grub_cryptodisk_insert (grub_cryptodisk_t newdev, const char *name,
newdev->id = last_cryptodisk_id++;
newdev->source_id = source->id;
newdev->source_dev_id = source->dev->id;
newdev->partition_start = grub_partition_get_start (source->partition);
newdev->next = cryptodisk_list;
cryptodisk_list = newdev;
@ -740,7 +742,9 @@ 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;
if ((disk->partition && grub_partition_get_start (disk->partition) == dev->partition_start) ||
(!disk->partition && dev->partition_start == 0))
return dev;
return NULL;
}
@ -761,6 +765,7 @@ grub_cryptodisk_cheat_insert (grub_cryptodisk_t newdev, const char *name,
newdev->cheat_fd = GRUB_UTIL_FD_INVALID;
newdev->source_id = source->id;
newdev->source_dev_id = source->dev->id;
newdev->partition_start = grub_partition_get_start (source->partition);
newdev->id = last_cryptodisk_id++;
newdev->next = cryptodisk_list;
cryptodisk_list = newdev;

1
include/grub/cryptodisk.h
View file

@ -97,6 +97,7 @@ struct grub_cryptodisk
grub_uint8_t rekey_key[64];
grub_uint64_t last_rekey;
int rekey_derived_size;
grub_disk_addr_t partition_start;
};
typedef struct grub_cryptodisk *grub_cryptodisk_t;