mirror of https://github.com/aria2/aria2
96 lines
3.4 KiB
C++
96 lines
3.4 KiB
C++
/* <!-- copyright */
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/*
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* aria2 - The high speed download utility
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*
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* Copyright (C) 2006 Tatsuhiro Tsujikawa
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*
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* In addition, as a special exception, the copyright holders give
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* permission to link the code of portions of this program with the
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* OpenSSL library under certain conditions as described in each
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* individual source file, and distribute linked combinations
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* including the two.
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* You must obey the GNU General Public License in all respects
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* for all of the code used other than OpenSSL. If you modify
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* file(s) with this exception, you may extend this exception to your
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* version of the file(s), but you are not obligated to do so. If you
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* do not wish to do so, delete this exception statement from your
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* version. If you delete this exception statement from all source
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* files in the program, then also delete it here.
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*/
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/* copyright --> */
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#ifndef _D_BASE64_H_
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#define _D_BASE64_H_
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#include <string>
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namespace aria2 {
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class Base64
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{
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private:
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/**
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* Removes non base64 chars(including '=') from src, and results are
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* stored in nsrc and its length is stored in nlength.
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* Caller must delete nsrc.
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*/
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static void removeNonBase64Chars(unsigned char*& nsrc, size_t& nlength,
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const unsigned char* src, size_t slength);
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public:
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/**
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* Encods src whose length is slength into base64 encoded data
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* and stores them to result.
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* result is allocated in this function and the length is stored to rlength.
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* If slength is equal to 0, then return with rlength set to 0 and result
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* is left untouched.
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* A caller must deallocate the memory used by result.
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*/
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static void encode(unsigned char*& result, size_t& rlength,
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const unsigned char* src, size_t slength);
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static void encode(unsigned char*& result, size_t& rlength,
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const char* src, size_t slength)
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{
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encode(result, rlength, (const unsigned char*)src, slength);
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}
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static std::string encode(const std::string& s);
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/**
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* Dencods base64 encoded src whose length is slength and stores them to
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* result.
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* result is allocated in this function and the length is stored to rlength.
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* If slength is equal to 0 or is not multiple of 4, then return with rlength
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* set to 0 and result is left untouched.
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* The function removes non-base64 characters before decoding.
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* A caller must deallocate the memory used by result.
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*/
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static void decode(unsigned char*& result, size_t& rlength,
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const unsigned char* src, size_t slength);
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static void decode(unsigned char*& result, size_t& rlength,
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const char* src, size_t slength)
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{
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decode(result, rlength, (const unsigned char*)src, slength);
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}
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static std::string decode(const std::string& s);
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};
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} // namespace aria2
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#endif // _BASE64_H_
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