/src/botan/build/include/botan/internal/skein_512.h
Line | Count | Source (jump to first uncovered line) |
1 | | /* |
2 | | * The Skein-512 hash function |
3 | | * (C) 2009,2014 Jack Lloyd |
4 | | * |
5 | | * Botan is released under the Simplified BSD License (see license.txt) |
6 | | */ |
7 | | |
8 | | #ifndef BOTAN_SKEIN_512_H_ |
9 | | #define BOTAN_SKEIN_512_H_ |
10 | | |
11 | | #include <botan/hash.h> |
12 | | #include <botan/internal/threefish_512.h> |
13 | | #include <string> |
14 | | #include <memory> |
15 | | |
16 | | namespace Botan { |
17 | | |
18 | | /** |
19 | | * Skein-512, a SHA-3 candidate |
20 | | */ |
21 | | class Skein_512 final : public HashFunction |
22 | | { |
23 | | public: |
24 | | /** |
25 | | * @param output_bits the output size of Skein in bits |
26 | | * @param personalization is a string that will parameterize the |
27 | | * hash output |
28 | | */ |
29 | | Skein_512(size_t output_bits = 512, |
30 | | const std::string& personalization = ""); |
31 | | |
32 | 0 | size_t hash_block_size() const override { return 64; } |
33 | 0 | size_t output_length() const override { return m_output_bits / 8; } |
34 | | |
35 | | std::unique_ptr<HashFunction> new_object() const override; |
36 | | std::unique_ptr<HashFunction> copy_state() const override; |
37 | | std::string name() const override; |
38 | | void clear() override; |
39 | | private: |
40 | | enum type_code { |
41 | | SKEIN_KEY = 0, |
42 | | SKEIN_CONFIG = 4, |
43 | | SKEIN_PERSONALIZATION = 8, |
44 | | SKEIN_PUBLIC_KEY = 12, |
45 | | SKEIN_KEY_IDENTIFIER = 16, |
46 | | SKEIN_NONCE = 20, |
47 | | SKEIN_MSG = 48, |
48 | | SKEIN_OUTPUT = 63 |
49 | | }; |
50 | | |
51 | | void add_data(const uint8_t input[], size_t length) override; |
52 | | void final_result(uint8_t out[]) override; |
53 | | |
54 | | void ubi_512(const uint8_t msg[], size_t msg_len); |
55 | | |
56 | | void initial_block(); |
57 | | void reset_tweak(type_code type, bool is_final); |
58 | | |
59 | | std::string m_personalization; |
60 | | size_t m_output_bits; |
61 | | |
62 | | std::unique_ptr<Threefish_512> m_threefish; |
63 | | secure_vector<uint64_t> m_T; |
64 | | secure_vector<uint8_t> m_buffer; |
65 | | size_t m_buf_pos; |
66 | | }; |
67 | | |
68 | | } |
69 | | |
70 | | #endif |