mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-02 07:56:39 +07:00
c0ca1215dc
While here, add missing argument description (ndigits). Signed-off-by: Tudor Ambarus <tudor.ambarus@microchip.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
88 lines
2.6 KiB
C
88 lines
2.6 KiB
C
/*
|
|
* 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>
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify it
|
|
* under the terms of the GNU General Public License as published by the Free
|
|
* Software Foundation; either version 2 of the License, or (at your option)
|
|
* any later version.
|
|
*
|
|
*/
|
|
#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 {
|
|
void *key;
|
|
void *p;
|
|
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
|
|
*/
|
|
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);
|
|
|
|
#endif
|