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142 lines
3.5 KiB
142 lines
3.5 KiB
#ifndef _DESHA1_HPP
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#define _DESHA1_HPP
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/*-------------------------------------------------------------------------
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* drawElements C++ Base Library
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* -----------------------------
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*
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* Copyright 2015 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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*//*!
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* \file
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* \brief SHA1 hash functions
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*//*--------------------------------------------------------------------*/
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#include "deDefs.hpp"
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#include "deSha1.h"
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#include <string>
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#include <vector>
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namespace de
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{
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class Sha1
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{
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public:
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Sha1 (const deSha1& hash) : m_hash(hash) {}
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static Sha1 parse (const std::string& str);
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static Sha1 compute (size_t size, const void* data);
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bool operator== (const Sha1& other) const { return deSha1_equal(&m_hash, &other.m_hash) == DE_TRUE; }
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bool operator!= (const Sha1& other) const { return !(*this == other); }
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private:
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deSha1 m_hash;
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};
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class Sha1Stream
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{
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public:
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Sha1Stream (void);
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void process (size_t size, const void* data);
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Sha1 finalize (void);
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private:
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deSha1Stream m_stream;
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};
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// Utility functions for building hash from values.
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// \note This is not same as serializing the values and computing hash from the data.
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// Some extra care is required when dealing with types that have platform
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// specific size.
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// All vectors and strings will include their size in the hash. Following codes
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// produce different results:
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// stream << "Hi" << "Hello";
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// and
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// stream << "HiHello";
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inline Sha1Stream& operator<< (Sha1Stream& stream, bool b)
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{
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const deUint8 value = b ? 1 : 0;
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stream.process(sizeof(value), &value);
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return stream;
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}
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inline Sha1Stream& operator<< (Sha1Stream& stream, deUint32 value)
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{
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const deUint8 data[] =
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{
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(deUint8)(0xFFu & (value >> 24)),
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(deUint8)(0xFFu & (value >> 16)),
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(deUint8)(0xFFu & (value >> 8)),
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(deUint8)(0xFFu & (value >> 0))
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};
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stream.process(sizeof(data), data);
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return stream;
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}
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inline Sha1Stream& operator<< (Sha1Stream& stream, deInt32 value)
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{
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return stream << (deUint32)value;
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}
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inline Sha1Stream& operator<< (Sha1Stream& stream, deUint64 value)
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{
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const deUint8 data[] =
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{
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(deUint8)(0xFFull & (value >> 56)),
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(deUint8)(0xFFull & (value >> 48)),
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(deUint8)(0xFFull & (value >> 40)),
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(deUint8)(0xFFull & (value >> 32)),
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(deUint8)(0xFFull & (value >> 24)),
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(deUint8)(0xFFull & (value >> 16)),
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(deUint8)(0xFFull & (value >> 8)),
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(deUint8)(0xFFull & (value >> 0))
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};
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stream.process(sizeof(data), data);
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return stream;
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}
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inline Sha1Stream& operator<< (Sha1Stream& stream, deInt64 value)
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{
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return stream << (deUint64)value;
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}
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template<typename T>
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inline Sha1Stream& operator<< (Sha1Stream& stream, const std::vector<T>& values)
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{
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stream << (deUint64)values.size();
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for (size_t ndx = 0; ndx < values.size(); ndx++)
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stream << values[ndx];
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return stream;
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}
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inline Sha1Stream& operator<< (Sha1Stream& stream, const std::string& str)
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{
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stream << (deUint64)str.size();
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stream.process(str.size(), str.c_str());
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return stream;
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}
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} // de
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#endif // _DESHA1_HPP
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