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/* -*- 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_ */
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