/src/botan/build/include/botan/internal/keccak.h
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1 | | /* |
2 | | * Keccak |
3 | | * (C) 2010 Jack Lloyd |
4 | | * |
5 | | * Botan is released under the Simplified BSD License (see license.txt) |
6 | | */ |
7 | | |
8 | | #ifndef BOTAN_KECCAK_H_ |
9 | | #define BOTAN_KECCAK_H_ |
10 | | |
11 | | #include <botan/hash.h> |
12 | | #include <botan/secmem.h> |
13 | | #include <string> |
14 | | |
15 | | namespace Botan { |
16 | | |
17 | | /** |
18 | | * Keccak[1600], a SHA-3 candidate |
19 | | */ |
20 | | class Keccak_1600 final : public HashFunction |
21 | | { |
22 | | public: |
23 | | |
24 | | /** |
25 | | * @param output_bits the size of the hash output; must be one of |
26 | | * 224, 256, 384, or 512 |
27 | | */ |
28 | | explicit Keccak_1600(size_t output_bits = 512); |
29 | | |
30 | 0 | size_t hash_block_size() const override { return m_bitrate / 8; } |
31 | 0 | size_t output_length() const override { return m_output_bits / 8; } |
32 | | |
33 | | std::unique_ptr<HashFunction> new_object() const override; |
34 | | std::unique_ptr<HashFunction> copy_state() const override; |
35 | | std::string name() const override; |
36 | | void clear() override; |
37 | | |
38 | | private: |
39 | | void add_data(const uint8_t input[], size_t length) override; |
40 | | void final_result(uint8_t out[]) override; |
41 | | |
42 | | size_t m_output_bits, m_bitrate; |
43 | | secure_vector<uint64_t> m_S; |
44 | | size_t m_S_pos; |
45 | | }; |
46 | | |
47 | | } |
48 | | |
49 | | #endif |