blob: d03a0b36a9b1ffa05da8b11d4a3c8f724a46d8f2 (
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
|
// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
// See the LICENSE file in the project root for more information.
//
#ifndef SHA1_H_
#define SHA1_H_
// Hasher class, performs no allocation and therefore does not throw or return
// errors. Usage is as follows:
// Create an instance (this initializes the hash).
// Add one or more blocks of input data using AddData().
// Retrieve the hash using GetHash(). This can be done as many times as desired
// until the object is destructed. Once a hash is asked for, further AddData
// calls will be ignored. There is no way to reset object state (simply
// destroy the object and create another instead).
#define SHA1_HASH_SIZE 20 // Number of bytes output by SHA-1
typedef struct {
UInt32 magic_sha1; // Magic value for A_SHA_CTX
UInt32 awaiting_data[16];
// Data awaiting full 512-bit block.
// Length (nbit_total[0] % 512) bits.
// Unused part of buffer (at end) is zero
UInt32 partial_hash[5];
// Hash through last full block
UInt32 nbit_total[2];
// Total length of message so far
// (bits, mod 2^64)
} SHA1_CTX;
class SHA1Hash
{
private:
SHA1_CTX m_Context;
UInt8 m_Value[SHA1_HASH_SIZE];
bool m_fFinalized;
void SHA1Init(SHA1_CTX*);
void SHA1Update(SHA1_CTX*, const UInt8*, const UInt32);
void SHA1Final(SHA1_CTX*, UInt8* digest);
public:
SHA1Hash();
void AddData(const UInt8 *pbData, UInt32 cbData);
UInt8 *GetHash();
};
#endif // SHA1_H_
|
