blob: 1568567e3c04b61157c156c445ff94b96f6314bc (
plain) (
blame)
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
|
#pragma once
#include <util/system/defaults.h>
#include <util/generic/string.h>
#include <util/generic/array_ref.h>
#include <util/generic/strbuf.h>
class IInputStream;
class MD5 {
public:
MD5() {
Init();
}
void Init();
inline MD5& Update(const void* data, size_t len) {
const char* buf = (const char*)data;
while (len) {
// NOTE: we don't want buffSz to be near Max<unsigned int>()
// because otherwise integer overflow might happen in UpdatePart
const unsigned int buffSz = Min(size_t(Max<unsigned int>() / 2), len);
UpdatePart(buf, buffSz);
buf += buffSz;
len -= buffSz;
}
return *this;
}
inline MD5& Update(const TStringBuf& data) {
return Update(data.data(), data.size());
}
void Pad();
unsigned char* Final(unsigned char[16]);
// buf must be char[33];
char* End(char* buf);
// buf must be char[25];
char* End_b64(char* buf);
// 8-byte xor-based mix
ui64 EndHalfMix();
MD5& Update(IInputStream* in);
/*
* Return hex-encoded md5 checksum for given file.
*
* Return nullptr / empty string if the file does not exist.
*/
static char* File(const char* filename, char* buf);
static TString File(const TString& filename);
static char* Data(const void* data, size_t len, char* buf);
static TString Data(TArrayRef<ui8> data);
static TString Data(TStringBuf data);
static char* Stream(IInputStream* in, char* buf);
static TString Calc(const TStringBuf& data); // 32-byte hex-encoded
static TString CalcRaw(const TStringBuf& data); // 16-byte raw
static ui64 CalcHalfMix(const TStringBuf& data);
static ui64 CalcHalfMix(const char* data, size_t len);
static bool IsMD5(const TStringBuf& data);
private:
void UpdatePart(const void* data, unsigned int len);
private:
ui32 State[4]; /* state (ABCD) */
ui32 Count[2]; /* number of bits, modulo 2^64 (lsb first) */
unsigned char Buffer[64]; /* input buffer */
};
|
