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47 lines
1.3 KiB
C++
47 lines
1.3 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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/* Simple class for computing SHA1. */
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/*
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* To compute the SHA1 of a buffer using this class you should write something
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* like:
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* void SHA1(const uint8_t* buf, unsigned size, uint8_t hash[20])
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* {
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* SHA1Sum S;
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* S.update(buf, size);
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* S.finish(hash);
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* }
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* If there are multiple buffers or chunks, the update method can be called
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* multiple times and the SHA1 is computed on the concatenation of all the
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* buffers passed to it.
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* The finish method may only be called once and cannot be followed by calls
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* to update.
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*/
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#ifndef mozilla_SHA1_h_
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#define mozilla_SHA1_h_
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#include "mozilla/StandardInteger.h"
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namespace mozilla {
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class SHA1Sum {
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union {
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uint32_t w[16]; /* input buffer */
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uint8_t b[64];
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} u;
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uint64_t size; /* count of hashed bytes. */
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unsigned H[22]; /* 5 state variables, 16 tmp values, 1 extra */
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bool mDone;
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public:
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static const unsigned int HashSize = 20;
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SHA1Sum();
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void update(const uint8_t *dataIn, uint32_t len);
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void finish(uint8_t hashout[20]);
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};
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}
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#endif /* mozilla_SHA1_h_ */
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