52 lines
2.4 KiB
C++
52 lines
2.4 KiB
C++
/*************************************************************************/
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/* Copyright (c) 2015 dx, http://kaimi.ru */
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/* */
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/* Permission is hereby granted, free of charge, to any person */
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/* obtaining a copy of this software and associated documentation */
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/* files (the "Software"), to deal in the Software without */
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/* restriction, including without limitation the rights to use, */
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/* copy, modify, merge, publish, distribute, sublicense, and/or */
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/* sell copies of the Software, and to permit persons to whom the */
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/* Software is furnished to do so, subject to the following conditions: */
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/* The above copyright notice and this permission notice shall be */
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/* included in all copies or substantial portions of the Software. */
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/* */
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/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
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/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
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/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
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/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
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/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
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/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
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/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
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/*************************************************************************/
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#pragma once
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#include <istream>
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#include "pe_base.h"
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namespace pe_bliss
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{
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class entropy_calculator
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{
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public:
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//Calculates entropy for PE image section
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static double calculate_entropy(const section& s);
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//Calculates entropy for istream (from current position of stream)
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static double calculate_entropy(std::istream& file);
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//Calculates entropy for data block
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static double calculate_entropy(const char* data, size_t length);
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//Calculates entropy for this PE file (only section data)
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static double calculate_entropy(const pe_base& pe);
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private:
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entropy_calculator();
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entropy_calculator(const entropy_calculator&);
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entropy_calculator& operator=(const entropy_calculator&);
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//Calculates entropy from bytes count
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static double calculate_entropy(const uint32_t byte_count[256], std::streamoff total_length);
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};
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}
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