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If device is not rotational, do not use Gutmann wipe method.

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git-svn-id: https://cryptsetup.googlecode.com/svn/trunk@615 36d66b0a-2a48-0410-832c-cd162a569da5
This commit is contained in:
Milan Broz
2011-10-08 16:17:08 +00:00
parent 61bec51be0
commit d2fbc963ca
8 changed files with 221 additions and 103 deletions
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20
lib/internal.h
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@@ -51,6 +51,7 @@ const char *get_error(void);
char *crypt_lookup_dev(const char *dev_id);
int crypt_sysfs_check_crypt_segment(const char *device, uint64_t offset, uint64_t size);
int crypt_sysfs_get_rotational(int major, int minor, int *rotational);
int sector_size_for_device(const char *device);
int device_read_ahead(const char *dev, uint32_t *read_ahead);
@@ -104,4 +105,23 @@ int PLAIN_activate(struct crypt_device *cd,
uint64_t size,
uint32_t flags);
/**
* Different methods used to erase sensitive data concerning
* either encrypted payload area or master key inside keyslot
* area
*/
typedef enum {
CRYPT_WIPE_ZERO, /**< overwrite area using zero blocks */
CRYPT_WIPE_DISK, /**< erase disk (using Gutmann method if it is rotational disk)*/
CRYPT_WIPE_SSD, /**< erase solid state disk (random write) */
CRYPT_WIPE_RANDOM /**< overwrite area using some up to now unspecified
* random algorithm */
} crypt_wipe_type;
int crypt_wipe(const char *device,
uint64_t offset,
uint64_t sectors,
crypt_wipe_type type,
int flags);
#endif /* INTERNAL_H */