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system_codec_container.cpp

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    base64.cpp 1.96 KiB
    /*
     *  Copyright (C) 2004-2018 Savoir-faire Linux Inc.
     *
     *  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, write to the Free Software
     *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301 USA.
     */
    
    #include "base64.h"
    
    #include <stdint.h>
    #include <stdlib.h>
    #include <iostream>
    #include <pjlib.h>
    #include <pjlib-util/base64.h>
    
    namespace ring {
    namespace base64 {
    
    std::string
    encode(const std::vector<uint8_t>::const_iterator begin,
           const std::vector<uint8_t>::const_iterator end)
    {
        int input_length = std::distance(begin, end);
        int output_length = PJ_BASE256_TO_BASE64_LEN(input_length);
        std::string out;
        out.resize(output_length);
    
        if(pj_base64_encode( &(*begin), input_length, &(*out.begin()), &output_length) != PJ_SUCCESS) {
            throw base64_exception();
        }
    
        out.resize(output_length);
        return out;
    }
    
    std::string
    encode(const std::vector<uint8_t>& dat)
    {
        return encode(dat.cbegin(), dat.cend());
    }
    
    std::vector<uint8_t>
    decode(const std::string& str)
    {
        int output_length = PJ_BASE64_TO_BASE256_LEN(str.length());
        pj_str_t input;
        pj_strset(&input, (char*) &(*str.begin()), str.length());
    
        std::vector<uint8_t> out;
        out.resize(output_length);
    
        if(pj_base64_decode(&input, &(*out.begin()), &output_length) != PJ_SUCCESS) {
            throw base64_exception();
        }
    
        out.resize(output_length);
        return out;
    }
    
    }} // namespace ring::base64