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File Content: `ecdh.h`

/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
 * ECDH params to be used with kpp API
 *
 * Copyright (c) 2016, Intel Corporation
 * Authors: Salvatore Benedetto <salvatore.benedetto@intel.com>
 */
#ifndef _CRYPTO_ECDH_
#define _CRYPTO_ECDH_

/**
 * DOC: ECDH Helper Functions
 *
 * To use ECDH with the KPP cipher API, the following data structure and
 * functions should be used.
 *
 * The ECC curves known to the ECDH implementation are specified in this
 * header file.
 *
 * To use ECDH with KPP, the following functions should be used to operate on
 * an ECDH private key. The packet private key that can be set with
 * the KPP API function call of crypto_kpp_set_secret.
 */

/* Curves IDs */
#define ECC_CURVE_NIST_P192	0x0001
#define ECC_CURVE_NIST_P256	0x0002

/**
 * struct ecdh - define an ECDH private key
 *
 * @curve_id:	ECC curve the key is based on.
 * @key:	Private ECDH key
 * @key_size:	Size of the private ECDH key
 */
struct ecdh {
	unsigned short curve_id;
	char *key;
	unsigned short key_size;
};

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

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

/**
 * crypto_ecdh_decode_key() - decode a private key
 * @buf:	Buffer holding a packet key that should be decoded
 * @len:	Length of the packet private key buffer
 * @p:		Buffer allocated by the caller that is filled with the
 *		unpacked ECDH 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_ecdh_decode_key(const char *buf, unsigned int len, struct ecdh *p);

#endif

Name	Size	Permission
internal	---	0755
acompress.h	8205 bytes	0644
aead.h	18003 bytes	0644
aes.h	2563 bytes	0644
akcipher.h	13223 bytes	0644
algapi.h	11388 bytes	0644
arc4.h	484 bytes	0644
asym_tpm_subtype.h	521 bytes	0644
authenc.h	635 bytes	0644
b128ops.h	2471 bytes	0644
blake2s.h	2423 bytes	0644
blowfish.h	415 bytes	0644
cast5.h	590 bytes	0644
cast6.h	624 bytes	0644
cast_common.h	232 bytes	0644
cbc.h	3367 bytes	0644
chacha.h	2131 bytes	0644
cryptd.h	2050 bytes	0644
ctr.h	1456 bytes	0644
des.h	1724 bytes	0644
dh.h	2574 bytes	0644
drbg.h	9209 bytes	0644
ecdh.h	2523 bytes	0644
engine.h	3992 bytes	0644
gcm.h	867 bytes	0644
gf128mul.h	9638 bytes	0644
ghash.h	388 bytes	0644
hash.h	32862 bytes	0644
hash_info.h	972 bytes	0644
hmac.h	173 bytes	0644
if_alg.h	6668 bytes	0644
kpp.h	10135 bytes	0644
md5.h	497 bytes	0644
nhpoly1305.h	2222 bytes	0644
null.h	346 bytes	0644
padlock.h	438 bytes	0644
pcrypt.h	815 bytes	0644
pkcs7.h	1181 bytes	0644
poly1305.h	1760 bytes	0644
public_key.h	2396 bytes	0644
rng.h	6748 bytes	0644
scatterwalk.h	3215 bytes	0644
serpent.h	696 bytes	0644
sha.h	4420 bytes	0644
sha1_base.h	2477 bytes	0644
sha256_base.h	2580 bytes	0644
sha3.h	879 bytes	0644
sha512_base.h	3222 bytes	0644
skcipher.h	21488 bytes	0644
sm3.h	833 bytes	0644
sm3_base.h	2573 bytes	0644
sm4.h	754 bytes	0644
streebog.h	949 bytes	0644
twofish.h	755 bytes	0644
xts.h	1380 bytes	0644

File Content: ecdh.h

File Content: `ecdh.h`