~ [ source navigation ] ~ [ diff markup ] ~ [ identifier search ] ~

TOMOYO Linux Cross Reference
Linux/include/crypto/dh.h

Version: ~ [ linux-5.19-rc3 ] ~ [ linux-5.18.5 ] ~ [ linux-5.17.15 ] ~ [ linux-5.16.20 ] ~ [ linux-5.15.48 ] ~ [ linux-5.14.21 ] ~ [ linux-5.13.19 ] ~ [ linux-5.12.19 ] ~ [ linux-5.11.22 ] ~ [ linux-5.10.123 ] ~ [ linux-5.9.16 ] ~ [ linux-5.8.18 ] ~ [ linux-5.7.19 ] ~ [ linux-5.6.19 ] ~ [ linux-5.5.19 ] ~ [ linux-5.4.199 ] ~ [ linux-5.3.18 ] ~ [ linux-5.2.21 ] ~ [ linux-5.1.21 ] ~ [ linux-5.0.21 ] ~ [ linux-4.20.17 ] ~ [ linux-4.19.248 ] ~ [ linux-4.18.20 ] ~ [ linux-4.17.19 ] ~ [ linux-4.16.18 ] ~ [ linux-4.15.18 ] ~ [ linux-4.14.284 ] ~ [ linux-4.13.16 ] ~ [ linux-4.12.14 ] ~ [ linux-4.11.12 ] ~ [ linux-4.10.17 ] ~ [ linux-4.9.319 ] ~ [ linux-4.8.17 ] ~ [ linux-4.7.10 ] ~ [ linux-4.6.7 ] ~ [ linux-4.5.7 ] ~ [ linux-4.4.302 ] ~ [ linux-4.3.6 ] ~ [ linux-4.2.8 ] ~ [ linux-4.1.52 ] ~ [ linux-4.0.9 ] ~ [ linux-3.10.108 ] ~ [ linux-2.6.32.71 ] ~ [ linux-2.6.0 ] ~ [ linux-2.4.37.11 ] ~ [ unix-v6-master ] ~ [ ccs-tools-1.8.9 ] ~ [ policy-sample ] ~
Architecture: ~ [ i386 ] ~ [ alpha ] ~ [ m68k ] ~ [ mips ] ~ [ ppc ] ~ [ sparc ] ~ [ sparc64 ] ~

  1 /* SPDX-License-Identifier: GPL-2.0-or-later */
  2 /*
  3  * Diffie-Hellman secret to be used with kpp API along with helper functions
  4  *
  5  * Copyright (c) 2016, Intel Corporation
  6  * Authors: Salvatore Benedetto <salvatore.benedetto@intel.com>
  7  */
  8 #ifndef _CRYPTO_DH_
  9 #define _CRYPTO_DH_
 10 
 11 /**
 12  * DOC: DH Helper Functions
 13  *
 14  * To use DH with the KPP cipher API, the following data structure and
 15  * functions should be used.
 16  *
 17  * To use DH with KPP, the following functions should be used to operate on
 18  * a DH private key. The packet private key that can be set with
 19  * the KPP API function call of crypto_kpp_set_secret.
 20  */
 21 
 22 /**
 23  * struct dh - define a DH private key
 24  *
 25  * @key:        Private DH key
 26  * @p:          Diffie-Hellman parameter P
 27  * @g:          Diffie-Hellman generator G
 28  * @key_size:   Size of the private DH key
 29  * @p_size:     Size of DH parameter P
 30  * @g_size:     Size of DH generator G
 31  */
 32 struct dh {
 33         const void *key;
 34         const void *p;
 35         const void *g;
 36         unsigned int key_size;
 37         unsigned int p_size;
 38         unsigned int g_size;
 39 };
 40 
 41 /**
 42  * crypto_dh_key_len() - Obtain the size of the private DH key
 43  * @params:     private DH key
 44  *
 45  * This function returns the packet DH key size. A caller can use that
 46  * with the provided DH private key reference to obtain the required
 47  * memory size to hold a packet key.
 48  *
 49  * Return: size of the key in bytes
 50  */
 51 unsigned int crypto_dh_key_len(const struct dh *params);
 52 
 53 /**
 54  * crypto_dh_encode_key() - encode the private key
 55  * @buf:        Buffer allocated by the caller to hold the packet DH
 56  *              private key. The buffer should be at least crypto_dh_key_len
 57  *              bytes in size.
 58  * @len:        Length of the packet private key buffer
 59  * @params:     Buffer with the caller-specified private key
 60  *
 61  * The DH implementations operate on a packet representation of the private
 62  * key.
 63  *
 64  * Return:      -EINVAL if buffer has insufficient size, 0 on success
 65  */
 66 int crypto_dh_encode_key(char *buf, unsigned int len, const struct dh *params);
 67 
 68 /**
 69  * crypto_dh_decode_key() - decode a private key
 70  * @buf:        Buffer holding a packet key that should be decoded
 71  * @len:        Length of the packet private key buffer
 72  * @params:     Buffer allocated by the caller that is filled with the
 73  *              unpacked DH private key.
 74  *
 75  * The unpacking obtains the private key by pointing @p to the correct location
 76  * in @buf. Thus, both pointers refer to the same memory.
 77  *
 78  * Return:      -EINVAL if buffer has insufficient size, 0 on success
 79  */
 80 int crypto_dh_decode_key(const char *buf, unsigned int len, struct dh *params);
 81 
 82 /**
 83  * __crypto_dh_decode_key() - decode a private key without parameter checks
 84  * @buf:        Buffer holding a packet key that should be decoded
 85  * @len:        Length of the packet private key buffer
 86  * @params:     Buffer allocated by the caller that is filled with the
 87  *              unpacked DH private key.
 88  *
 89  * Internal function providing the same services as the exported
 90  * crypto_dh_decode_key(), but without any of those basic parameter
 91  * checks conducted by the latter.
 92  *
 93  * Return:      -EINVAL if buffer has insufficient size, 0 on success
 94  */
 95 int __crypto_dh_decode_key(const char *buf, unsigned int len,
 96                            struct dh *params);
 97 
 98 #endif
 99 

~ [ source navigation ] ~ [ diff markup ] ~ [ identifier search ] ~

kernel.org | git.kernel.org | LWN.net | Project Home | Wiki (Japanese) | Wiki (English) | SVN repository | Mail admin

Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.

osdn.jp