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Name	Size	Permission	Date
internal	[ DIR ]	drwxr-xr-x	2026-06-04 06:36
acompress.h	9.26 KB	-rw-r--r--	2024-03-10 20:38
aead.h	19.47 KB	-rw-r--r--	2024-03-10 20:38
aes.h	2.5 KB	-rw-r--r--	2024-03-10 20:38
akcipher.h	15.21 KB	-rw-r--r--	2024-03-10 20:38
algapi.h	7.65 KB	-rw-r--r--	2024-03-10 20:38
arc4.h	484 B	-rw-r--r--	2024-03-10 20:38
aria.h	16.71 KB	-rw-r--r--	2024-03-10 20:38
authenc.h	635 B	-rw-r--r--	2024-03-10 20:38
b128ops.h	2.26 KB	-rw-r--r--	2024-03-10 20:38
blake2b.h	1.57 KB	-rw-r--r--	2024-03-10 20:38
blake2s.h	2.62 KB	-rw-r--r--	2024-03-10 20:38
blowfish.h	415 B	-rw-r--r--	2024-03-10 20:38
cast5.h	590 B	-rw-r--r--	2024-03-10 20:38
cast6.h	607 B	-rw-r--r--	2024-03-10 20:38
cast_common.h	232 B	-rw-r--r--	2024-03-10 20:38
chacha.h	3.32 KB	-rw-r--r--	2024-03-10 20:38
chacha20poly1305.h	1.66 KB	-rw-r--r--	2024-03-10 20:38
cryptd.h	2 KB	-rw-r--r--	2024-03-10 20:38
ctr.h	1.42 KB	-rw-r--r--	2024-03-10 20:38
curve25519.h	2.02 KB	-rw-r--r--	2024-03-10 20:38
des.h	1.68 KB	-rw-r--r--	2024-03-10 20:38
dh.h	3.03 KB	-rw-r--r--	2024-03-10 20:38
drbg.h	9.02 KB	-rw-r--r--	2024-03-10 20:38
ecc_curve.h	1.31 KB	-rw-r--r--	2024-03-10 20:38
ecdh.h	2.43 KB	-rw-r--r--	2024-03-10 20:38
engine.h	3.72 KB	-rw-r--r--	2024-03-10 20:38
gcm.h	1.48 KB	-rw-r--r--	2024-03-10 20:38
gf128mul.h	9.42 KB	-rw-r--r--	2024-03-10 20:38
ghash.h	388 B	-rw-r--r--	2024-03-10 20:38
hash.h	33.47 KB	-rw-r--r--	2026-05-26 09:55
hash_info.h	1023 B	-rw-r--r--	2024-03-10 20:38
hmac.h	173 B	-rw-r--r--	2024-03-10 20:38
if_alg.h	6.5 KB	-rw-r--r--	2026-05-26 09:55
kdf_sp800108.h	2.07 KB	-rw-r--r--	2024-03-10 20:38
kpp.h	10.9 KB	-rw-r--r--	2024-03-10 20:38
md5.h	497 B	-rw-r--r--	2024-03-10 20:38
nhpoly1305.h	2.18 KB	-rw-r--r--	2024-03-10 20:38
null.h	346 B	-rw-r--r--	2024-03-10 20:38
padlock.h	438 B	-rw-r--r--	2024-03-10 20:38
pcrypt.h	821 B	-rw-r--r--	2024-03-10 20:38
pkcs7.h	1.15 KB	-rw-r--r--	2024-03-10 20:38
poly1305.h	2.44 KB	-rw-r--r--	2024-03-10 20:38
polyval.h	445 B	-rw-r--r--	2024-03-10 20:38
public_key.h	3.59 KB	-rw-r--r--	2024-03-10 20:38
rng.h	7.72 KB	-rw-r--r--	2024-03-10 20:38
scatterwalk.h	3.69 KB	-rw-r--r--	2026-05-26 09:55
serpent.h	696 B	-rw-r--r--	2024-03-10 20:38
sha1.h	1.18 KB	-rw-r--r--	2024-03-10 20:38
sha1_base.h	2.45 KB	-rw-r--r--	2024-03-10 20:38
sha2.h	3.75 KB	-rw-r--r--	2024-03-10 20:38
sha256_base.h	3.12 KB	-rw-r--r--	2026-05-26 09:55
sha3.h	879 B	-rw-r--r--	2024-03-10 20:38
sha512_base.h	3.18 KB	-rw-r--r--	2024-03-10 20:38
sig.h	4.1 KB	-rw-r--r--	2024-03-10 20:38
skcipher.h	33.05 KB	-rw-r--r--	2024-03-10 20:38
sm2.h	745 B	-rw-r--r--	2024-03-10 20:38
sm3.h	1.6 KB	-rw-r--r--	2024-03-10 20:38
sm3_base.h	2.55 KB	-rw-r--r--	2024-03-10 20:38
sm4.h	1.22 KB	-rw-r--r--	2024-03-10 20:38
streebog.h	949 B	-rw-r--r--	2024-03-10 20:38
twofish.h	743 B	-rw-r--r--	2024-03-10 20:38
utils.h	1.89 KB	-rw-r--r--	2024-03-10 20:38
xts.h	978 B	-rw-r--r--	2024-03-10 20:38

Rename

/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
 * Diffie-Hellman secret to be used with kpp API along with helper functions
 *
 * Copyright (c) 2016, Intel Corporation
 * Authors: Salvatore Benedetto <salvatore.benedetto@intel.com>
 */
#ifndef _CRYPTO_DH_
#define _CRYPTO_DH_

/**
 * DOC: DH Helper Functions
 *
 * To use DH with the KPP cipher API, the following data structure and
 * functions should be used.
 *
 * To use DH with KPP, the following functions should be used to operate on
 * a DH private key. The packet private key that can be set with
 * the KPP API function call of crypto_kpp_set_secret.
 */

/**
 * struct dh - define a DH private key
 *
 * @key:	Private DH key
 * @p:		Diffie-Hellman parameter P
 * @g:		Diffie-Hellman generator G
 * @key_size:	Size of the private DH key
 * @p_size:	Size of DH parameter P
 * @g_size:	Size of DH generator G
 */
struct dh {
	const void *key;
	const void *p;
	const void *g;
	unsigned int key_size;
	unsigned int p_size;
	unsigned int g_size;
};

/**
 * crypto_dh_key_len() - Obtain the size of the private DH key
 * @params:	private DH key
 *
 * This function returns the packet DH key size. A caller can use that
 * with the provided DH private key reference to obtain the required
 * memory size to hold a packet key.
 *
 * Return: size of the key in bytes
 */
unsigned int crypto_dh_key_len(const struct dh *params);

/**
 * crypto_dh_encode_key() - encode the private key
 * @buf:	Buffer allocated by the caller to hold the packet DH
 *		private key. The buffer should be at least crypto_dh_key_len
 *		bytes in size.
 * @len:	Length of the packet private key buffer
 * @params:	Buffer with the caller-specified private key
 *
 * The DH implementations operate on a packet representation of the private
 * key.
 *
 * Return:	-EINVAL if buffer has insufficient size, 0 on success
 */
int crypto_dh_encode_key(char *buf, unsigned int len, const struct dh *params);

/**
 * crypto_dh_decode_key() - decode a private key
 * @buf:	Buffer holding a packet key that should be decoded
 * @len:	Length of the packet private key buffer
 * @params:	Buffer allocated by the caller that is filled with the
 *		unpacked DH private key.
 *
 * The unpacking obtains the private key by pointing @p to the correct location
 * in @buf. Thus, both pointers refer to the same memory.
 *
 * Return:	-EINVAL if buffer has insufficient size, 0 on success
 */
int crypto_dh_decode_key(const char *buf, unsigned int len, struct dh *params);

/**
 * __crypto_dh_decode_key() - decode a private key without parameter checks
 * @buf:	Buffer holding a packet key that should be decoded
 * @len:	Length of the packet private key buffer
 * @params:	Buffer allocated by the caller that is filled with the
 *		unpacked DH private key.
 *
 * Internal function providing the same services as the exported
 * crypto_dh_decode_key(), but without any of those basic parameter
 * checks conducted by the latter.
 *
 * Return:	-EINVAL if buffer has insufficient size, 0 on success
 */
int __crypto_dh_decode_key(const char *buf, unsigned int len,
			   struct dh *params);

#endif