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