blob: cf2cb8c6796bbc2052a39593555c4efa8915c44f (
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
|
/*
* Copyright 2013 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#ifndef SkSHA1_DEFINED
#define SkSHA1_DEFINED
#include "SkTypes.h"
#include "SkEndian.h"
#include "SkStream.h"
//The following macros can be defined to affect the SHA1 code generated.
//SK_SHA1_CLEAR_DATA causes all intermediate state to be overwritten with 0's.
//SK_CPU_BENDIAN allows 32 bit <=> 8 bit conversions without copies (if alligned).
//SK_CPU_FAST_UNALIGNED_ACCESS allows 32 bit <=> 8 bit conversions without copies if SK_CPU_BENDIAN.
class SkSHA1 : public SkWStream {
public:
SkSHA1();
/** Processes input, adding it to the digest.
* Note that this treats the buffer as a series of uint8_t values.
*/
virtual bool write(const void* buffer, size_t size) SK_OVERRIDE {
update(reinterpret_cast<const uint8_t*>(buffer), size);
return true;
}
/** Processes input, adding it to the digest. Calling this after finish is undefined. */
void update(const uint8_t* input, size_t length);
struct Digest {
uint8_t data[20];
};
/** Computes and returns the digest. */
void finish(Digest& digest);
private:
// number of bytes, modulo 2^64
uint64_t byteCount;
// state (ABCDE)
uint32_t state[5];
// input buffer
uint8_t buffer[64];
};
#endif
|
