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Linux srv843233 6.8.0-71-generic #71-Ubuntu SMP PREEMPT_DYNAMIC Tue Jul 22 16:52:38 UTC 2025 x86_64
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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_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; /* * In FIPS mode only a combined key length of either 256 or * 512 bits is allowed, c.f. FIPS 140-3 IG C.I. */ if (fips_enabled && keylen != 32 && keylen != 64) return -EINVAL; /* * Ensure that the AES and tweak key are not identical when * in FIPS mode or the FORBID_WEAK_KEYS flag is set. */ 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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