Botan 2.19.1
Crypto and TLS for C&
gost_28147.h
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1/*
2* GOST 28147-89
3* (C) 1999-2009 Jack Lloyd
4*
5* Botan is released under the Simplified BSD License (see license.txt)
6*/
7
8#ifndef BOTAN_GOST_28147_89_H_
9#define BOTAN_GOST_28147_89_H_
10
11#include <botan/block_cipher.h>
12
14
15namespace Botan {
16
17/**
18* The GOST 28147-89 block cipher uses a set of 4 bit Sboxes, however
19* the standard does not actually define these Sboxes; they are
20* considered a local configuration issue. Several different sets are
21* used.
22*/
24 {
25 public:
26 /**
27 * @param row the row
28 * @param col the column
29 * @return sbox entry at this row/column
30 */
31 uint8_t sbox_entry(size_t row, size_t col) const;
32
33 /**
34 * @return name of this parameter set
35 */
36 std::string param_name() const { return m_name; }
37
38 /**
39 * Return a representation used for building larger tables
40 * For internal use
41 */
42 uint8_t sbox_pair(size_t row, size_t col) const;
43
44 /**
45 * Default GOST parameters are the ones given in GOST R 34.11 for
46 * testing purposes; these sboxes are also used by Crypto++, and,
47 * at least according to Wikipedia, the Central Bank of Russian
48 * Federation
49 * @param name of the parameter set
50 */
51 explicit GOST_28147_89_Params(const std::string& name = "R3411_94_TestParam");
52 private:
53 const uint8_t* m_sboxes;
54 std::string m_name;
55 };
56
57/**
58* GOST 28147-89
59*/
61 {
62 public:
63 void encrypt_n(const uint8_t in[], uint8_t out[], size_t blocks) const override;
64 void decrypt_n(const uint8_t in[], uint8_t out[], size_t blocks) const override;
65
66 void clear() override;
67
68 std::string name() const override;
69 BlockCipher* clone() const override { return new GOST_28147_89(m_SBOX); }
70
71 /**
72 * @param params the sbox parameters to use
73 */
74 explicit GOST_28147_89(const GOST_28147_89_Params& params);
75
76 explicit GOST_28147_89(const std::string& param_name) :
78 private:
79 explicit GOST_28147_89(const std::vector<uint32_t>& other_SBOX) :
80 m_SBOX(other_SBOX), m_EK(8) {}
81
82 void key_schedule(const uint8_t[], size_t) override;
83
84 /*
85 * The sbox is not secret, this is just a larger expansion of it
86 * which we generate at runtime for faster execution
87 */
88 std::vector<uint32_t> m_SBOX;
89
90 secure_vector<uint32_t> m_EK;
91 };
92
93}
94
95#endif
std::string param_name() const
Definition: gost_28147.h:36
GOST_28147_89(const std::string &param_name)
Definition: gost_28147.h:76
BlockCipher * clone() const override
Definition: gost_28147.h:69
std::string name
int(* final)(unsigned char *, CTX *)
#define BOTAN_PUBLIC_API(maj, min)
Definition: compiler.h:31
#define BOTAN_FUTURE_INTERNAL_HEADER(hdr)
Definition: compiler.h:136
Definition: alg_id.cpp:13