The Tor Browser / file comparison
comparison: gfx/skia/trunk/src/utils/SkSHA1.h
gfx/skia/trunk/src/utils/SkSHA1.h
- branch
- TOR_BUG_3246
- changeset 7
- 129ffea94266
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| -1:000000000000 | 0:ac6700c3fd73 |
|---|---|
| 1 /* | |
| 2 * Copyright 2013 Google Inc. | |
| 3 * | |
| 4 * Use of this source code is governed by a BSD-style license that can be | |
| 5 * found in the LICENSE file. | |
| 6 */ | |
| 7 | |
| 8 #ifndef SkSHA1_DEFINED | |
| 9 #define SkSHA1_DEFINED | |
| 10 | |
| 11 #include "SkTypes.h" | |
| 12 #include "SkEndian.h" | |
| 13 #include "SkStream.h" | |
| 14 | |
| 15 //The following macros can be defined to affect the SHA1 code generated. | |
| 16 //SK_SHA1_CLEAR_DATA causes all intermediate state to be overwritten with 0's. | |
| 17 //SK_CPU_BENDIAN allows 32 bit <=> 8 bit conversions without copies (if alligned). | |
| 18 //SK_CPU_FAST_UNALIGNED_ACCESS allows 32 bit <=> 8 bit conversions without copies if SK_CPU_BENDIAN. | |
| 19 | |
| 20 class SkSHA1 : public SkWStream { | |
| 21 public: | |
| 22 SkSHA1(); | |
| 23 | |
| 24 /** Processes input, adding it to the digest. | |
| 25 * Note that this treats the buffer as a series of uint8_t values. | |
| 26 */ | |
| 27 virtual bool write(const void* buffer, size_t size) SK_OVERRIDE { | |
| 28 update(reinterpret_cast<const uint8_t*>(buffer), size); | |
| 29 return true; | |
| 30 } | |
| 31 | |
| 32 virtual size_t bytesWritten() const SK_OVERRIDE { return SkToSizeT(this->byteCount); } | |
| 33 | |
| 34 /** Processes input, adding it to the digest. Calling this after finish is undefined. */ | |
| 35 void update(const uint8_t* input, size_t length); | |
| 36 | |
| 37 struct Digest { | |
| 38 uint8_t data[20]; | |
| 39 }; | |
| 40 | |
| 41 /** Computes and returns the digest. */ | |
| 42 void finish(Digest& digest); | |
| 43 | |
| 44 private: | |
| 45 // number of bytes, modulo 2^64 | |
| 46 uint64_t byteCount; | |
| 47 | |
| 48 // state (ABCDE) | |
| 49 uint32_t state[5]; | |
| 50 | |
| 51 // input buffer | |
| 52 uint8_t buffer[64]; | |
| 53 }; | |
| 54 | |
| 55 #endif |
