| 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
|---|
| 2 | /* |
|---|
| 3 | * HKDF: HMAC-based Key Derivation Function (HKDF), RFC 5869 |
|---|
| 4 | * |
|---|
| 5 | * Extracted from fs/crypto/hkdf.c, which has |
|---|
| 6 | * Copyright 2019 Google LLC |
|---|
| 7 | */ |
|---|
| 8 | |
|---|
| 9 | #ifndef _CRYPTO_HKDF_H |
|---|
| 10 | #define _CRYPTO_HKDF_H |
|---|
| 11 | |
|---|
| 12 | #include <crypto/hash.h> |
|---|
| 13 | |
|---|
| 14 | int (struct crypto_shash *hmac_tfm, const u8 *ikm, |
|---|
| 15 | unsigned int ikmlen, const u8 *salt, unsigned int saltlen, |
|---|
| 16 | u8 *prk); |
|---|
| 17 | int hkdf_expand(struct crypto_shash *hmac_tfm, |
|---|
| 18 | const u8 *info, unsigned int infolen, |
|---|
| 19 | u8 *okm, unsigned int okmlen); |
|---|
| 20 | #endif |
|---|
| 21 | |
|---|
