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Edit File:
xts.h
/* SPDX-License-Identifier: GPL-2.0 */ #ifndef _CRYPTO_XTS_H #define _CRYPTO_XTS_H #include <crypto/b128ops.h> #include <crypto/internal/skcipher.h> #include <linux/fips.h> #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 length must be even. */ if (keylen % 2) return -EINVAL; /* ensure that the AES and tweak key are not identical */ if ((fips_enabled || (crypto_skcipher_get_flags(tfm) & CRYPTO_TFM_REQ_FORBID_WEAK_KEYS)) && !crypto_memneq(key, key + (keylen / 2), keylen / 2)) return -EINVAL; return 0; } #endif /* _CRYPTO_XTS_H */
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