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/* SPDX-License-Identifier: GPL-2.0 */ /* * HKDF: HMAC-based Key Derivation Function (HKDF), RFC 5869 * * Extracted from fs/crypto/hkdf.c, which has * Copyright 2019 Google LLC */ #ifndef _CRYPTO_HKDF_H #define _CRYPTO_HKDF_H #include <crypto/hash.h> int hkdf_extract(struct crypto_shash *hmac_tfm, const u8 *ikm, unsigned int ikmlen, const u8 *salt, unsigned int saltlen, u8 *prk); int hkdf_expand(struct crypto_shash *hmac_tfm, const u8 *info, unsigned int infolen, u8 *okm, unsigned int okmlen); #endif