base64.cpp

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/*
 *  Copyright (C) 2004-2025 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, see <https://www.gnu.org/licenses/>.
 */
 
#include "base64.h"
#include "connectivity/sip_utils.h"
 
#include <pjlib.h>
#include <pjlib-util/base64.h>
 
namespace jami {
namespace base64 {
 
std::string
encode(std::string_view dat)
{
    if (dat.empty() || dat.size() > INT_MAX)
        return {};
 
    int input_length = (int)dat.size();
    int output_length = PJ_BASE256_TO_BASE64_LEN(input_length);
    std::string out;
    out.resize(output_length);
 
    if (pj_base64_encode((const uint8_t*)dat.data(), input_length, &(*out.begin()), &output_length) != PJ_SUCCESS) {
        throw base64_exception();
    }
 
    out.resize(output_length);
    return out;
}
 
std::vector<uint8_t>
decode(std::string_view str)
{
    if (str.empty())
        return {};
 
    int output_length = PJ_BASE64_TO_BASE256_LEN(str.length());
    auto input = sip_utils::CONST_PJ_STR(str);
 
    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 base64
} // namespace jami