1 /*
2 * Streebog
3 * (C) 2017 Ribose Inc.
4 *
5 * Botan is released under the Simplified BSD License (see license.txt)
6 */
7 
8 #ifndef BOTAN_STREEBOG_H_
9 #define BOTAN_STREEBOG_H_
10 
11 #include <botan/hash.h>
12 
13 BOTAN_FUTURE_INTERNAL_HEADER(streebog.h)
14 
15 namespace Botan {
16 
17 /**
18 * Streebog (GOST R 34.11-2012)
19 * RFC 6986
20 */
21 class BOTAN_PUBLIC_API(2,2) Streebog : public HashFunction
22    {
23    public:
output_length()24       size_t output_length() const override { return m_output_bits / 8; }
25 
clone()26       HashFunction* clone() const override { return new Streebog(m_output_bits); }
27       void clear() override;
28       std::string name() const override;
hash_block_size()29       size_t hash_block_size() const override { return 64; }
30 
31       std::unique_ptr<HashFunction> copy_state() const override;
32 
33       explicit Streebog(size_t output_bits);
34    protected:
35       void add_data(const uint8_t input[], size_t length) override;
36       void final_result(uint8_t out[]) override;
37 
38       void compress(const uint8_t input[], bool lastblock = false);
39 
40       void compress_64(const uint64_t input[], bool lastblock = false);
41 
42    private:
43       const size_t m_output_bits;
44       uint64_t m_count;
45       size_t m_position;
46       secure_vector<uint8_t> m_buffer;
47       secure_vector<uint64_t> m_h;
48       secure_vector<uint64_t> m_S;
49    };
50 
51 
52 /**
53 * Streebog-256
54 */
55 class BOTAN_PUBLIC_API(2,2) Streebog_256 final : public Streebog
56    {
57    public:
Streebog_256()58       Streebog_256() : Streebog(256) {}
59    };
60 
61 /**
62 * Streebog-512
63 */
64 class BOTAN_PUBLIC_API(2,2) Streebog_512 final : public Streebog
65    {
66    public:
Streebog_512()67       Streebog_512() : Streebog(512) {}
68    };
69 
70 }
71 
72 #endif
73