1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
|
/*
* HKDF
* (C) 2013,2015 Jack Lloyd
* (C) 2016 René Korthaus, Rohde & Schwarz Cybersecurity
*
* Botan is released under the Simplified BSD License (see license.txt)
*/
#ifndef BOTAN_HKDF_H__
#define BOTAN_HKDF_H__
#include <botan/mac.h>
#include <botan/hash.h>
#include <botan/kdf.h>
namespace Botan {
/**
* HKDF from RFC 5869.
*/
class BOTAN_DLL HKDF final : public KDF
{
public:
/**
* @param prf MAC algorithm to use
*/
explicit HKDF(MessageAuthenticationCode* prf) : m_prf(prf) {}
KDF* clone() const override { return new HKDF(m_prf->clone()); }
std::string name() const override { return "HKDF(" + m_prf->name() + ")"; }
size_t kdf(byte key[], size_t key_len,
const byte secret[], size_t secret_len,
const byte salt[], size_t salt_len,
const byte label[], size_t label_len) const override;
private:
MessageAuthenticationCode* m_prf;
};
/**
* HKDF Extraction Step from RFC 5869.
*/
class BOTAN_DLL HKDF_Extract final : public KDF
{
public:
/**
* @param prf MAC algorithm to use
*/
explicit HKDF_Extract(MessageAuthenticationCode* prf) : m_prf(prf) {}
KDF* clone() const override { return new HKDF_Extract(m_prf->clone()); }
std::string name() const override { return "HKDF-Extract(" + m_prf->name() + ")"; }
size_t kdf(byte key[], size_t key_len,
const byte secret[], size_t secret_len,
const byte salt[], size_t salt_len,
const byte label[], size_t label_len) const override;
private:
std::unique_ptr<MessageAuthenticationCode> m_prf;
};
/**
* HKDF Expansion Step from RFC 5869.
*/
class BOTAN_DLL HKDF_Expand final : public KDF
{
public:
/**
* @param prf MAC algorithm to use
*/
explicit HKDF_Expand(MessageAuthenticationCode* prf) : m_prf(prf) {}
KDF* clone() const override { return new HKDF_Expand(m_prf->clone()); }
std::string name() const override { return "HKDF-Expand(" + m_prf->name() + ")"; }
size_t kdf(byte key[], size_t key_len,
const byte secret[], size_t secret_len,
const byte salt[], size_t salt_len,
const byte label[], size_t label_len) const override;
private:
std::unique_ptr<MessageAuthenticationCode> m_prf;
};
}
#endif
|
