blob: 255c769f6216f37abe875c31c65519917b68937c (
plain)
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
|
// This file is part of a crypto library, exam for the Algorithms class.
// All of these files are under MIT license.
//
// SHA declaration document:
// https://nvlpubs.nist.gov/nistpubs/FIPS/NIST.FIPS.180-4.pdf
#ifndef HMACSHA256_SHA_H_
#define HMACSHA256_SHA_H_
#include<cstdint>
#include<array>
namespace hmacsha256 {
class SHA {
public:
SHA() {
digest_ = new uint8_t[32];
}
~SHA() {
delete digest_;
}
// get digest as array of bytes
virtual uint8_t* digest() = 0;
virtual std::string hexdigest() = 0;
protected:
uint8_t* digest_;
// work variables: a, b, c, d, e, f, g, h
uint32_t vars_[8];
// data message, in bytes
// M, "message to be hashed"
uint8_t message_[64];
// length L of the original message
uint32_t message_l_;
// lenght of bits
uint64_t bit_len_;
// the constructor
virtual void init(const uint8_t* data, uint32_t length) = 0;
// padding
virtual void pad() = 0;
// main function
virtual void transform() = 0;
};
} // namespace hmacsha256
#endif // HMACSHA256_SHA_H_
|
