1 /* SPDX-License-Identifier: GPL-2.0 */ 1 2 3 /* 4 * Copyright (C) 2021, Stephan Mueller <smuell 5 */ 6 7 #ifndef _CRYPTO_KDF108_H 8 #define _CRYPTO_KDF108_H 9 10 #include <crypto/hash.h> 11 #include <linux/uio.h> 12 13 /** 14 * Counter KDF generate operation according to 15 * as well as SP800-56A section 5.8.1 (Single- 16 * 17 * @kmd Keyed message digest whose key was set 18 * unkeyed message digest 19 * @info optional context and application spec 20 * NULL 21 * @info_vec number of optional context/applic 22 * @dst destination buffer that the caller alr 23 * @dlen length of the destination buffer - th 24 * bytes. 25 * 26 * To comply with SP800-108, the caller must p 27 * in the info parameter. 28 * 29 * @return 0 on success, < 0 on error 30 */ 31 int crypto_kdf108_ctr_generate(struct crypto_s 32 const struct kv 33 u8 *dst, unsign 34 35 /** 36 * Counter KDF setkey operation 37 * 38 * @kmd Keyed message digest allocated by the 39 * been set. 40 * @key Seed key to be used to initialize the 41 * @keylen This length of the key buffer. 42 * @ikm The SP800-108 KDF does not support IKM 43 * @ikmlen This parameter must be 0. 44 * 45 * According to SP800-108 section 7.2, the see 46 * the message digest size of the used keyed m 47 * is enforced by the implementation. 48 * 49 * SP800-108 allows the use of either a HMAC o 50 * the caller intends to use a hash primitive, 51 * crypto_kdf108_setkey is not required and th 52 * immediately performed using crypto_kdf108_c 53 * a handle. 54 * 55 * @return 0 on success, < 0 on error 56 */ 57 int crypto_kdf108_setkey(struct crypto_shash * 58 const u8 *key, size_t 59 const u8 *ikm, size_t 60 61 #endif /* _CRYPTO_KDF108_H */ 62
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