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gost_28147
gost_28147.h
Go to the documentation of this file.
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/*
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* GOST 28147-89
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* (C) 1999-2009 Jack Lloyd
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*
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* Distributed under the terms of the Botan license
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*/
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#ifndef BOTAN_GOST_28147_89_H__
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#define BOTAN_GOST_28147_89_H__
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#include <botan/block_cipher.h>
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namespace
Botan
{
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/**
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* The GOST 28147-89 block cipher uses a set of 4 bit Sboxes, however
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* the standard does not actually define these Sboxes; they are
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* considered a local configuration issue. Several different sets are
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* used.
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*/
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class
BOTAN_DLL
GOST_28147_89_Params
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{
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public
:
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/**
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* @param row the row
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* @param col the column
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* @return sbox entry at this row/column
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*/
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byte
sbox_entry(
size_t
row,
size_t
col)
const
;
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/**
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* @return name of this parameter set
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*/
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std::string
param_name
()
const
{
return
name; }
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/**
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* Default GOST parameters are the ones given in GOST R 34.11 for
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* testing purposes; these sboxes are also used by Crypto++, and,
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* at least according to Wikipedia, the Central Bank of Russian
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* Federation
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* @param name of the parameter set
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*/
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GOST_28147_89_Params
(
const
std::string& name =
"R3411_94_TestParam"
);
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private
:
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const
byte
* sboxes;
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std::string name;
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};
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/**
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* GOST 28147-89
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*/
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class
BOTAN_DLL
GOST_28147_89
:
public
Block_Cipher_Fixed_Params
<8, 32>
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{
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public
:
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void
encrypt_n(
const
byte
in[],
byte
out[],
size_t
blocks)
const
;
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void
decrypt_n(
const
byte
in[],
byte
out[],
size_t
blocks)
const
;
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void
clear
() {
zeroise
(EK); }
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std::string name()
const
;
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BlockCipher
*
clone
()
const
{
return
new
GOST_28147_89
(SBOX); }
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/**
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* @param params the sbox parameters to use
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*/
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GOST_28147_89
(
const
GOST_28147_89_Params
& params);
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private
:
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GOST_28147_89
(
const
SecureVector<u32bit>
& other_SBOX) :
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SBOX(other_SBOX), EK(8) {}
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void
key_schedule(
const
byte
[],
size_t
);
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SecureVector<u32bit> SBOX;
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SecureVector<u32bit> EK;
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};
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}
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#endif
Botan::GOST_28147_89_Params
Definition:
gost_28147.h:21
Botan::GOST_28147_89
Definition:
gost_28147.h:52
Botan::GOST_28147_89::clone
BlockCipher * clone() const
Definition:
gost_28147.h:61
Botan::GOST_28147_89::clear
void clear()
Definition:
gost_28147.h:58
Botan::byte
unsigned char byte
Definition:
types.h:22
Botan::GOST_28147_89_Params::param_name
std::string param_name() const
Definition:
gost_28147.h:34
Botan
Definition:
algo_base.h:14
Botan::SecureVector< u32bit >
Botan::Block_Cipher_Fixed_Params
Definition:
block_cipher.h:104
Botan::zeroise
void zeroise(MemoryRegion< T > &vec)
Definition:
secmem.h:415
Botan::BlockCipher
Definition:
block_cipher.h:18
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