Coverage Report

Created: 2020-06-30 13:58

/src/botan/build/include/botan/comb4p.h
Line
Count
Source (jump to first uncovered line)
1
/*
2
* Comb4P hash combiner
3
* (C) 2010 Jack Lloyd
4
*
5
* Botan is released under the Simplified BSD License (see license.txt)
6
*/
7
8
#ifndef BOTAN_COMB4P_H_
9
#define BOTAN_COMB4P_H_
10
11
#include <botan/hash.h>
12
13
BOTAN_FUTURE_INTERNAL_HEADER(comb4p.h)
14
15
namespace Botan {
16
17
/**
18
* Combines two hash functions using a Feistel scheme. Described in
19
* "On the Security of Hash Function Combiners", Anja Lehmann
20
*/
21
class BOTAN_PUBLIC_API(2,0) Comb4P final : public HashFunction
22
   {
23
   public:
24
      /**
25
      * @param h1 the first hash
26
      * @param h2 the second hash
27
      */
28
      Comb4P(HashFunction* h1, HashFunction* h2);
29
30
      size_t hash_block_size() const override;
31
32
      size_t output_length() const override
33
0
         {
34
0
         return m_hash1->output_length() + m_hash2->output_length();
35
0
         }
36
37
      HashFunction* clone() const override
38
0
         {
39
0
         return new Comb4P(m_hash1->clone(), m_hash2->clone());
40
0
         }
41
42
      std::unique_ptr<HashFunction> copy_state() const override;
43
44
      std::string name() const override
45
0
         {
46
0
         return "Comb4P(" + m_hash1->name() + "," + m_hash2->name() + ")";
47
0
         }
48
49
      void clear() override;
50
   private:
51
0
      Comb4P() = default;
52
53
      void add_data(const uint8_t input[], size_t length) override;
54
      void final_result(uint8_t out[]) override;
55
56
      std::unique_ptr<HashFunction> m_hash1, m_hash2;
57
   };
58
59
}
60
61
#endif