/src/botan/build/include/botan/internal/shake.h
Line | Count | Source (jump to first uncovered line) |
1 | | /* |
2 | | * SHAKE hash functions |
3 | | * (C) 2010,2016 Jack Lloyd |
4 | | * |
5 | | * Botan is released under the Simplified BSD License (see license.txt) |
6 | | */ |
7 | | |
8 | | #ifndef BOTAN_SHAKE_HASH_H_ |
9 | | #define BOTAN_SHAKE_HASH_H_ |
10 | | |
11 | | #include <botan/hash.h> |
12 | | #include <botan/internal/keccak_perm.h> |
13 | | |
14 | | #include <string> |
15 | | |
16 | | namespace Botan { |
17 | | |
18 | | /** |
19 | | * SHAKE-128 |
20 | | */ |
21 | | class SHAKE_128 final : public HashFunction { |
22 | | public: |
23 | | /** |
24 | | * @param output_bits the desired output size in bits |
25 | | * must be a multiple of 8 |
26 | | */ |
27 | | explicit SHAKE_128(size_t output_bits); |
28 | | |
29 | 0 | size_t hash_block_size() const override { return m_keccak.byte_rate(); } |
30 | | |
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 | | |
37 | 0 | void clear() override { m_keccak.clear(); } |
38 | | |
39 | 0 | std::string provider() const override { return m_keccak.provider(); } |
40 | | |
41 | | private: |
42 | | void add_data(std::span<const uint8_t> input) override; |
43 | | void final_result(std::span<uint8_t> out) override; |
44 | | |
45 | | Keccak_Permutation m_keccak; |
46 | | size_t m_output_bits; |
47 | | }; |
48 | | |
49 | | /** |
50 | | * SHAKE-256 |
51 | | */ |
52 | | class SHAKE_256 final : public HashFunction { |
53 | | public: |
54 | | /** |
55 | | * @param output_bits the desired output size in bits |
56 | | * must be a multiple of 8 |
57 | | */ |
58 | | explicit SHAKE_256(size_t output_bits); |
59 | | |
60 | 0 | size_t hash_block_size() const override { return m_keccak.byte_rate(); } |
61 | | |
62 | 0 | size_t output_length() const override { return m_output_bits / 8; } |
63 | | |
64 | | std::unique_ptr<HashFunction> new_object() const override; |
65 | | std::unique_ptr<HashFunction> copy_state() const override; |
66 | | std::string name() const override; |
67 | | |
68 | 0 | void clear() override { m_keccak.clear(); } |
69 | | |
70 | 0 | std::string provider() const override { return m_keccak.provider(); } |
71 | | |
72 | | private: |
73 | | void add_data(std::span<const uint8_t> input) override; |
74 | | void final_result(std::span<uint8_t> out) override; |
75 | | |
76 | | Keccak_Permutation m_keccak; |
77 | | size_t m_output_bits; |
78 | | }; |
79 | | |
80 | | } // namespace Botan |
81 | | |
82 | | #endif |