mirror of
https://github.com/mozilla/gecko-dev.git
synced 2024-12-04 19:33:18 +00:00
62 lines
1.6 KiB
C++
62 lines
1.6 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
|
|
/* This Source Code Form is subject to the terms of the Mozilla Public
|
|
* License, v. 2.0. If a copy of the MPL was not distributed with this
|
|
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
|
|
|
|
/* Simple class for computing SHA1. */
|
|
|
|
#ifndef mozilla_SHA1_h_
|
|
#define mozilla_SHA1_h_
|
|
|
|
#include "mozilla/StandardInteger.h"
|
|
#include "mozilla/Types.h"
|
|
|
|
#include <stddef.h>
|
|
|
|
namespace mozilla {
|
|
|
|
/**
|
|
* This class computes the SHA1 hash of a byte sequence, or of the concatenation
|
|
* of multiple sequences. For example, computing the SHA1 of two sequences of
|
|
* bytes could be done as follows:
|
|
*
|
|
* void SHA1(const uint8_t* buf1, uint32_t size1,
|
|
* const uint8_t* buf2, uint32_t size2,
|
|
* SHA1Sum::Hash& hash)
|
|
* {
|
|
* SHA1Sum s;
|
|
* s.update(buf1, size1);
|
|
* s.update(buf2, size2);
|
|
* s.finish(hash);
|
|
* }
|
|
*
|
|
* The finish method may only be called once and cannot be followed by calls
|
|
* to update.
|
|
*/
|
|
class SHA1Sum
|
|
{
|
|
union {
|
|
uint32_t w[16]; /* input buffer */
|
|
uint8_t b[64];
|
|
} u;
|
|
uint64_t size; /* count of hashed bytes. */
|
|
unsigned H[22]; /* 5 state variables, 16 tmp values, 1 extra */
|
|
bool mDone;
|
|
|
|
public:
|
|
MFBT_API SHA1Sum();
|
|
|
|
static const size_t HashSize = 20;
|
|
typedef uint8_t Hash[HashSize];
|
|
|
|
/* Add len bytes of dataIn to the data sequence being hashed. */
|
|
MFBT_API void update(const void* dataIn, uint32_t len);
|
|
|
|
/* Compute the final hash of all data into hashOut. */
|
|
MFBT_API void finish(SHA1Sum::Hash& hashOut);
|
|
};
|
|
|
|
} /* namespace mozilla */
|
|
|
|
#endif /* mozilla_SHA1_h_ */
|