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authorNorbert Preining <norbert@preining.info>2019-09-02 13:46:59 +0900
committerNorbert Preining <norbert@preining.info>2019-09-02 13:46:59 +0900
commite0c6872cf40896c7be36b11dcc744620f10adf1d (patch)
tree60335e10d2f4354b0674ec22d7b53f0f8abee672 /dviware/dvisvgm/src/MD5HashFunction.hpp
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+/*************************************************************************
+** MD5HashFunction.hpp **
+** **
+** This file is part of dvisvgm -- a fast DVI to SVG converter **
+** Copyright (C) 2005-2019 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:
+ explicit 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> digestValue () 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
+