1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/mfbt/SHA1.h Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,62 @@
1.4 +/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
1.5 +/* vim: set ts=8 sts=2 et sw=2 tw=80: */
1.6 +/* This Source Code Form is subject to the terms of the Mozilla Public
1.7 + * License, v. 2.0. If a copy of the MPL was not distributed with this
1.8 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
1.9 +
1.10 +/* Simple class for computing SHA1. */
1.11 +
1.12 +#ifndef mozilla_SHA1_h
1.13 +#define mozilla_SHA1_h
1.14 +
1.15 +#include "mozilla/Types.h"
1.16 +
1.17 +#include <stddef.h>
1.18 +#include <stdint.h>
1.19 +
1.20 +namespace mozilla {
1.21 +
1.22 +/**
1.23 + * This class computes the SHA1 hash of a byte sequence, or of the concatenation
1.24 + * of multiple sequences. For example, computing the SHA1 of two sequences of
1.25 + * bytes could be done as follows:
1.26 + *
1.27 + * void SHA1(const uint8_t* buf1, uint32_t size1,
1.28 + * const uint8_t* buf2, uint32_t size2,
1.29 + * SHA1Sum::Hash& hash)
1.30 + * {
1.31 + * SHA1Sum s;
1.32 + * s.update(buf1, size1);
1.33 + * s.update(buf2, size2);
1.34 + * s.finish(hash);
1.35 + * }
1.36 + *
1.37 + * The finish method may only be called once and cannot be followed by calls
1.38 + * to update.
1.39 + */
1.40 +class SHA1Sum
1.41 +{
1.42 + union {
1.43 + uint32_t w[16]; /* input buffer */
1.44 + uint8_t b[64];
1.45 + } u;
1.46 + uint64_t size; /* count of hashed bytes. */
1.47 + unsigned H[22]; /* 5 state variables, 16 tmp values, 1 extra */
1.48 + bool mDone;
1.49 +
1.50 + public:
1.51 + MFBT_API SHA1Sum();
1.52 +
1.53 + static const size_t HashSize = 20;
1.54 + typedef uint8_t Hash[HashSize];
1.55 +
1.56 + /* Add len bytes of dataIn to the data sequence being hashed. */
1.57 + MFBT_API void update(const void* dataIn, uint32_t len);
1.58 +
1.59 + /* Compute the final hash of all data into hashOut. */
1.60 + MFBT_API void finish(SHA1Sum::Hash& hashOut);
1.61 +};
1.62 +
1.63 +} /* namespace mozilla */
1.64 +
1.65 +#endif /* mozilla_SHA1_h */
