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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
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