/src/botan/build/include/botan/internal/mdx_hash.h
Line | Count | Source |
1 | | /* |
2 | | * MDx Hash Function |
3 | | * (C) 1999-2008 Jack Lloyd |
4 | | * |
5 | | * Botan is released under the Simplified BSD License (see license.txt) |
6 | | */ |
7 | | |
8 | | #ifndef BOTAN_MDX_BASE_H_ |
9 | | #define BOTAN_MDX_BASE_H_ |
10 | | |
11 | | #include <botan/hash.h> |
12 | | |
13 | | namespace Botan { |
14 | | |
15 | | /** |
16 | | * MDx Hash Function Base Class |
17 | | */ |
18 | | class MDx_HashFunction : public HashFunction { |
19 | | public: |
20 | | /** |
21 | | * @param block_length is the number of bytes per block, which must |
22 | | * be a power of 2 and at least 8. |
23 | | * @param big_byte_endian specifies if the hash uses big-endian bytes |
24 | | * @param big_bit_endian specifies if the hash uses big-endian bits |
25 | | * @param counter_size specifies the size of the counter var in bytes |
26 | | */ |
27 | | MDx_HashFunction(size_t block_length, bool big_byte_endian, bool big_bit_endian, uint8_t counter_size = 8); |
28 | | |
29 | 1 | size_t hash_block_size() const override final { return m_buffer.size(); } |
30 | | |
31 | | protected: |
32 | | void add_data(const uint8_t input[], size_t length) override final; |
33 | | void final_result(uint8_t output[]) override final; |
34 | | |
35 | | /** |
36 | | * Run the hash's compression function over a set of blocks |
37 | | * @param blocks the input |
38 | | * @param block_n the number of blocks |
39 | | */ |
40 | | virtual void compress_n(const uint8_t blocks[], size_t block_n) = 0; |
41 | | |
42 | | void clear() override; |
43 | | |
44 | | /** |
45 | | * Copy the output to the buffer |
46 | | * @param buffer to put the output into |
47 | | */ |
48 | | virtual void copy_out(uint8_t buffer[]) = 0; |
49 | | |
50 | | private: |
51 | | const uint8_t m_pad_char; |
52 | | const uint8_t m_counter_size; |
53 | | const uint8_t m_block_bits; |
54 | | const bool m_count_big_endian; |
55 | | |
56 | | uint64_t m_count; |
57 | | secure_vector<uint8_t> m_buffer; |
58 | | size_t m_position; |
59 | | }; |
60 | | |
61 | | } // namespace Botan |
62 | | |
63 | | #endif |