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/* SPDX-License-Identifier: GPL-2.0 */ #ifndef _CRYPTO_XTS_H #define _CRYPTO_XTS_H #include #include #include #define XTS_BLOCK_SIZE 16 static inline int xts_check_key(struct crypto_tfm *tfm, const u8 *key, unsigned int keylen) { /* * key consists of keys of equal size concatenated, therefore * the length must be even. */ if (keylen % 2) return -EINVAL; /* ensure that the AES and tweak key are not identical */ if (fips_enabled && !crypto_memneq(key, key + (keylen / 2), keylen / 2)) return -EINVAL; return 0; } static inline int xts_verify_key(struct crypto_skcipher *tfm, const u8 *key, unsigned int keylen) { /* * key consists of keys of equal size concatenated, therefore * the