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Add crypt_get_old_volume_key_size API.

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It allows to get former (old) volume key size
from LUKS2 device in reencryption state when
there's at least one keyslot containing encrypted
volume key.
This commit is contained in:
Ondrej Kozina
2025-05-16 13:49:37 +02:00
committed by Milan Broz
parent 3dcb532bd3
commit 4e94c8d809
6 changed files with 73 additions and 0 deletions
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13
lib/libcryptsetup.h
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@@ -2034,6 +2034,19 @@ uint64_t crypt_get_iv_offset(struct crypt_device *cd);
*/
int crypt_get_volume_key_size(struct crypt_device *cd);
/**
* Get size (in bytes) of old volume key for LUKS2 device in reencryption.
*
* @param cd crypt LUKS2 device handle
*
* @return old volume key size when device is in reencryption state
*
* @note For LUKS2, this function can be used only if there is at least
* one keyslot assigned to old data segment. Also with reencryption
* mode 'encrypt' there's no old volume key.
*/
int crypt_get_old_volume_key_size(struct crypt_device *cd);
/**
* Get size (in bytes) of encryption sector for crypt device.
*