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/*************************************************************************
** MD5HashFunction.hpp **
** **
** This file is part of dvisvgm -- a fast DVI to SVG converter **
** Copyright (C) 2005-2022 Martin Gieseking <martin.gieseking@uos.de> **
** **
** This program is free software; you can redistribute it and/or **
** modify it under the terms of the GNU General Public License as **
** published by the Free Software Foundation; either version 3 of **
** the License, or (at your option) any later version. **
** **
** This program is distributed in the hope that it will be useful, but **
** WITHOUT ANY WARRANTY; without even the implied warranty of **
** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the **
** GNU General Public License for more details. **
** **
** You should have received a copy of the GNU General Public License **
** along with this program; if not, see <http://www.gnu.org/licenses/>. **
*************************************************************************/
#ifndef MD5HASHFUNCTION_HPP
#define MD5HASHFUNCTION_HPP
#include <config.h>
#ifdef HAVE_OPENSSL_MD5_H
# include <openssl/md5.h>
#else
# include <md5.h>
#endif
#include "HashFunction.hpp"
class MD5HashFunction : public HashFunction {
public:
MD5HashFunction () {MD5_Init(&_context);}
MD5HashFunction (const char *data, size_t length) : MD5HashFunction() {update(data, length);}
explicit MD5HashFunction (const std::string &data) : MD5HashFunction() {update(data);}
explicit MD5HashFunction (const std::vector<uint8_t> &data) : MD5HashFunction() {update(data);}
int digestSize () const override {return 16;}
void reset () override {MD5_Init(&_context);}
void update (const char *data, size_t length) override {MD5_Update(&_context, data, length);}
void update (const std::string &data) override {update(data.data(), data.length());}
void update (const std::vector<uint8_t> &data) override {update(reinterpret_cast<const char*>(data.data()), data.size());}
std::vector<uint8_t> digestBytes () const override {
std::vector<uint8_t> hash(16);
MD5_CTX savedContext = _context;
MD5_Final(hash.data(), &_context); // also erases the context structure
_context = savedContext;
return hash;
}
private:
mutable MD5_CTX _context;
};
#endif
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