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Add resilient LUKS2 reencryption library code.

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This commit is contained in:
Ondrej Kozina
2015-10-02 17:21:10 +02:00
parent a5c5e3e876
commit a7f80a2770
17 changed files with 4942 additions and 191 deletions
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27
lib/luks2/luks2_json_format.c
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@@ -370,3 +370,30 @@ int LUKS2_wipe_header_areas(struct crypt_device *cd,
return crypt_wipe_device(cd, crypt_metadata_device(cd), CRYPT_WIPE_RANDOM,
offset, length, wipe_block, NULL, NULL);
}
/* FIXME: what if user wanted to keep original keyslots size? */
int LUKS2_set_keyslots_size(struct crypt_device *cd,
struct luks2_hdr *hdr,
uint64_t data_offset)
{
json_object *jobj_config;
uint64_t keyslots_size;
if (data_offset < get_min_offset(hdr))
return 1;
keyslots_size = data_offset - get_min_offset(hdr);
/* keep keyslots_size reasonable for custom data alignments */
if (keyslots_size > LUKS2_MAX_KEYSLOTS_SIZE)
keyslots_size = LUKS2_MAX_KEYSLOTS_SIZE;
/* keyslots size has to be 4 KiB aligned */
keyslots_size -= (keyslots_size % 4096);
if (!json_object_object_get_ex(hdr->jobj, "config", &jobj_config))
return 1;
json_object_object_add(jobj_config, "keyslots_size", json_object_new_uint64(keyslots_size));
return 0;
}