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cryptsetup: Adjust XTS keys size also if cipher is specified with capi: prefix.

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Fixes: #776
This commit is contained in:
Milan Broz
2025-05-15 12:24:47 +02:00
parent bd2f7eb671
commit e5c2892cd5
4 changed files with 5 additions and 5 deletions
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2
src/cryptsetup.c
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@@ -1589,7 +1589,7 @@ int luksFormat(struct crypt_device **r_cd, struct crypt_keyslot_context **r_kc)
goto out;
}
keysize = get_adjusted_key_size(cipher_mode, ARG_UINT32(OPT_KEY_SIZE_ID),
keysize = get_adjusted_key_size(cipher, cipher_mode, ARG_UINT32(OPT_KEY_SIZE_ID),
DEFAULT_LUKS1_KEYBITS, integrity_keysize);
if (ARG_SET(OPT_HW_OPAL_ONLY_ID))

4
src/utils_luks.c
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@@ -139,11 +139,11 @@ int set_tries_tty(bool keyring)
return (tools_is_stdin(ARG_STR(OPT_KEY_FILE_ID)) && isatty(STDIN_FILENO)) ? ARG_UINT32(OPT_TRIES_ID) : 1;
}
int get_adjusted_key_size(const char *cipher_mode, uint32_t keysize_bits,
int get_adjusted_key_size(const char *cipher, const char *cipher_mode, uint32_t keysize_bits,
uint32_t default_size_bits, int integrity_keysize)
{
#if ENABLE_LUKS_ADJUST_XTS_KEYSIZE
if (!keysize_bits && !strncmp(cipher_mode, "xts-", 4)) {
if (!keysize_bits && (!strncmp(cipher_mode, "xts-", 4) || !strncmp(cipher, "capi:xts(", 9))) {
if (default_size_bits == 128)
keysize_bits = 256;
else if (default_size_bits == 256)

2
src/utils_luks.h
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@@ -27,7 +27,7 @@ int set_pbkdf_params(struct crypt_device *cd, const char *dev_type);
int set_tries_tty(bool keyring);
int get_adjusted_key_size(const char *cipher_mode, uint32_t keysize_bits,
int get_adjusted_key_size(const char *cipher, const char *cipher_mode, uint32_t keysize_bits,
uint32_t default_size_bits, int integrity_keysize);
int luksFormat(struct crypt_device **r_cd, struct crypt_keyslot_context **r_kc);

2
src/utils_reencrypt.c
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@@ -1910,7 +1910,7 @@ static int reencrypt_luks2_init(struct crypt_device *cd, const char *data_device
new_key_size = ARG_UINT32(OPT_NEW_KEY_SIZE_ID);
if (new_key_size || new_cipher)
new_key_size = get_adjusted_key_size(mode, new_key_size,
new_key_size = get_adjusted_key_size(cipher, mode, new_key_size,
DEFAULT_LUKS1_KEYBITS, 0);
else
new_key_size = key_size;