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Check if there is a free space in keyslot area early (LUKS2).

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The code expects that change key is done in-place if there is not
a free space in keyslot area for safe key swap.

This patch makes the code behaves the same as in LUKS1,
luksChangeKey now works the same.
This commit is contained in:
Milan Broz
2021-01-30 17:14:36 +01:00
parent 04b781d613
commit 2d10545e70
7 changed files with 25 additions and 14 deletions
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2
lib/luks2/luks2.h
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@@ -379,7 +379,7 @@ int LUKS2_keyslot_params_default(struct crypt_device *cd, struct luks2_hdr *hdr,
int LUKS2_get_volume_key_size(struct luks2_hdr *hdr, int segment);
int LUKS2_get_keyslot_stored_key_size(struct luks2_hdr *hdr, int keyslot);
const char *LUKS2_get_keyslot_cipher(struct luks2_hdr *hdr, int keyslot, size_t *key_size);
int LUKS2_keyslot_find_empty(struct luks2_hdr *hdr);
int LUKS2_keyslot_find_empty(struct crypt_device *cd, struct luks2_hdr *hdr, size_t keylength);
int LUKS2_keyslot_active_count(struct luks2_hdr *hdr, int segment);
crypt_keyslot_info LUKS2_keyslot_info(struct luks2_hdr *hdr, int keyslot);
int LUKS2_keyslot_area(struct luks2_hdr *hdr,