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Introduce new 64bit *keyfile_device_offset functions.

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The keyfile interface was designed, well, for keyfiles.

Unfortunately, a keyfile can be placed on a device and the size_t offset
can overflow.

We have to introduce new set of fucntions that allows 64bit offsets even on 32bit systems:
 - crypt_resume_by_keyfile_device_offset
 - crypt_keyslot_add_by_keyfile_device_offset
 - crypt_activate_by_keyfile_device_offset
 - crypt_keyfile_device_read

The new functions have added _device_ in name.

Old functions are just internall wrappers around these.

Also cryptsetup --keyfile-offset and --new-keyfile-offset must now
process 64bit offsets.

For more info see issue 359.
This commit is contained in:
Milan Broz
2018-01-17 22:07:23 +01:00
parent b072c6c4c9
commit f34ce81f25
10 changed files with 202 additions and 75 deletions
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2
src/cryptsetup.h
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@@ -83,7 +83,7 @@ int tools_signals_blocked(void);
int tools_get_key(const char *prompt,
char **key, size_t *key_size,
size_t keyfile_offset, size_t keyfile_size_max,
uint64_t keyfile_offset, size_t keyfile_size_max,
const char *key_file,
int timeout, int verify, int pwquality,
struct crypt_device *cd);