OrcaSlicer/src/libslic3r/miniz_extension.cpp

#include <exception>
#include <cstdint>

#include "miniz_extension.hpp"
#include "Utils.hpp"

#include <boost/filesystem.hpp>
#include <boost/log/trivial.hpp>

#if defined(_MSC_VER) || defined(__MINGW64__)
#include "boost/nowide/cstdio.hpp"
#endif

#include "I18N.hpp"

//! macro used to mark string used at localization,
//! return same string
#define L(s) Slic3r::I18N::translate(s)

namespace Slic3r {

namespace {
std::string decode_zip_unicode_path_extra_field(const std::string& extra, const std::string& path)
{
    size_t offset = 0;
    const mz_uint32 path_crc = mz_crc32(0, reinterpret_cast<const unsigned char*>(path.data()), path.size());

    while (offset + 4 <= extra.size()) {
        const unsigned char* field = reinterpret_cast<const unsigned char*>(extra.data() + offset);
        const std::uint16_t len = field[2] | (static_cast<std::uint16_t>(field[3]) << 8);
        if (offset + 4 + len > extra.size())
            break;

        if (field[0] == 0x75 && field[1] == 0x70 && len >= 5 && field[4] == 0x01) {
            const mz_uint32 stored_crc =
                static_cast<mz_uint32>(field[5]) |
                (static_cast<mz_uint32>(field[6]) << 8) |
                (static_cast<mz_uint32>(field[7]) << 16) |
                (static_cast<mz_uint32>(field[8]) << 24);
            if (stored_crc == path_crc)
                return std::string(extra.data() + offset + 9, extra.data() + offset + 4 + len);
        }

        offset += 4 + len;
    }

    return Slic3r::decode_path(path.c_str());
}

bool open_zip(mz_zip_archive *zip, const char *fname, bool isread)
{
    if (!zip) return false;
    const char *mode = isread ? "rb" : "wb";

    FILE *f = nullptr;
#if defined(_MSC_VER) || defined(__MINGW64__)
    f = boost::nowide::fopen(fname, mode);
#elif defined(__GNUC__) && defined(_LARGEFILE64_SOURCE)
    f = fopen64(fname, mode);
#else
    f = fopen(fname, mode);
#endif

    if (!f) {
        zip->m_last_error = MZ_ZIP_FILE_OPEN_FAILED;
        return false;
    }

    bool res = false;
    if (isread)
    {
        res = mz_zip_reader_init_cfile(zip, f, 0, 0);
        if (!res)
            // if we get here it means we tried to open a non-zip file
            // we need to close the file here because the call to mz_zip_get_cfile() made into close_zip() returns a null pointer
            // see: https://github.com/prusa3d/PrusaSlicer/issues/3536
            fclose(f);
    }
    else
        res = mz_zip_writer_init_cfile(zip, f, 0);

    return res;
}

bool close_zip(mz_zip_archive *zip, bool isread)
{
    bool ret = false;
    if (zip) {
        FILE *f = mz_zip_get_cfile(zip);
        ret     = bool(isread ? mz_zip_reader_end(zip)
                          : mz_zip_writer_end(zip));
        if (f) fclose(f);
    }
    return ret;
}
}

bool open_zip_reader(mz_zip_archive *zip, const std::string &fname)
{
    return open_zip(zip, fname.c_str(), true);
}

bool open_zip_writer(mz_zip_archive *zip, const std::string &fname)
{
    return open_zip(zip, fname.c_str(), false);
}

bool close_zip_reader(mz_zip_archive *zip) { return close_zip(zip, true); }
bool close_zip_writer(mz_zip_archive *zip) { return close_zip(zip, false); }

std::string decode_archive_entry_path(mz_zip_archive *zip, const mz_zip_archive_file_stat &stat)
{
    if (stat.m_is_utf8)
        return stat.m_filename;

    std::string extra(1024, 0);
    const size_t extra_size = mz_zip_reader_get_extra(zip, stat.m_file_index, extra.data(), extra.size());
    return decode_zip_unicode_path_extra_field(extra.substr(0, extra_size > 0 ? extra_size - 1 : 0), stat.m_filename);
}

bool extract_archive_confined(const std::string &zip_path_utf8, const std::string &dest_dir)
{
    mz_zip_archive archive;
    mz_zip_zero_struct(&archive);

    if (!open_zip_reader(&archive, zip_path_utf8)) {
        BOOST_LOG_TRIVIAL(error) << "Unable to open zip reader for " << zip_path_utf8;
        return false;
    }

    const mz_uint num_entries = mz_zip_reader_get_num_files(&archive);
    mz_zip_archive_file_stat stat;

    // Validate every entry first so an archive with a single escaping entry leaves no partial output behind.
    const boost::filesystem::path root(dest_dir);
    for (mz_uint i = 0; i < num_entries; ++i) {
        if (mz_zip_reader_file_stat(&archive, i, &stat) && !is_path_within_root(stat.m_filename, root)) {
            BOOST_LOG_TRIVIAL(error) << "Unzip: rejecting " << zip_path_utf8 << ", entry " << stat.m_filename << " resolves outside " << dest_dir;
            close_zip_reader(&archive);
            return false;
        }
    }

    for (mz_uint i = 0; i < num_entries; ++i) {
        if (!mz_zip_reader_file_stat(&archive, i, &stat)) {
            BOOST_LOG_TRIVIAL(warning) << "Unzip: read file stat failed";
            continue;
        }
        const std::string dest_file = dest_dir + "/" + stat.m_filename;
        try {
            if (stat.m_is_directory) {
                const boost::filesystem::path dest_path(dest_file);
                if (!boost::filesystem::exists(dest_path))
                    boost::filesystem::create_directories(dest_path);
                continue;
            }
            if (stat.m_uncomp_size == 0) {
                BOOST_LOG_TRIVIAL(warning) << "Unzip: invalid size for file " << stat.m_filename;
                continue;
            }
            // Replace a symlink at the destination rather than writing through it.
            const boost::filesystem::path dest_path(dest_file);
            if (boost::filesystem::is_symlink(boost::filesystem::symlink_status(dest_path)))
                boost::filesystem::remove(dest_path);
            if (!mz_zip_reader_extract_to_file(&archive, stat.m_file_index, dest_file.c_str(), 0)) {
                BOOST_LOG_TRIVIAL(error) << "Unzip: extract file " << stat.m_filename << " to dest " << dest_file << " failed";
                close_zip_reader(&archive);
                return false;
            }
            BOOST_LOG_TRIVIAL(info) << "Unzip: successfully extract file " << stat.m_file_index << " to " << dest_file;
        } catch (const std::exception &e) {
            close_zip_reader(&archive);
            BOOST_LOG_TRIVIAL(error) << "Unzip: archive read exception: " << e.what();
            return false;
        }
    }
    close_zip_reader(&archive);
    return true;
}

MZ_Archive::MZ_Archive()
{
    mz_zip_zero_struct(&arch);
}

std::string MZ_Archive::get_errorstr(mz_zip_error mz_err)
{
    switch (mz_err)
    {
    case MZ_ZIP_NO_ERROR:
        return "no error";
    case MZ_ZIP_UNDEFINED_ERROR:
        return L("undefined error");
    case MZ_ZIP_TOO_MANY_FILES:
        return L("too many files");
    case MZ_ZIP_FILE_TOO_LARGE:
        return L("File too large");
    case MZ_ZIP_UNSUPPORTED_METHOD:
        return L("unsupported method");
    case MZ_ZIP_UNSUPPORTED_ENCRYPTION:
        return L("unsupported encryption");
    case MZ_ZIP_UNSUPPORTED_FEATURE:
        return L("unsupported feature");
    case MZ_ZIP_FAILED_FINDING_CENTRAL_DIR:
        return L("failed finding central directory");
    case MZ_ZIP_NOT_AN_ARCHIVE:
        return L("not a ZIP archive");
    case MZ_ZIP_INVALID_HEADER_OR_CORRUPTED:
        return L("invalid header or corrupted");
    case MZ_ZIP_UNSUPPORTED_MULTIDISK:
        return L("Saving to RAID is not supported.");
    case MZ_ZIP_DECOMPRESSION_FAILED:
        return L("decompression failed");
    case MZ_ZIP_COMPRESSION_FAILED:
        return L("compression failed");
    case MZ_ZIP_UNEXPECTED_DECOMPRESSED_SIZE:
        return L("unexpected decompressed size");
    case MZ_ZIP_CRC_CHECK_FAILED:
        return L("CRC check failed");
    case MZ_ZIP_UNSUPPORTED_CDIR_SIZE:
        return L("unsupported central directory size");
    case MZ_ZIP_ALLOC_FAILED:
        return L("allocation failed");
    case MZ_ZIP_FILE_OPEN_FAILED:
        return L("file open failed");
    case MZ_ZIP_FILE_CREATE_FAILED:
        return L("file create failed");
    case MZ_ZIP_FILE_WRITE_FAILED:
        return L("file write failed");
    case MZ_ZIP_FILE_READ_FAILED:
        return L("file read failed");
    case MZ_ZIP_FILE_CLOSE_FAILED:
        return L("file close failed");
    case MZ_ZIP_FILE_SEEK_FAILED:
        return L("file seek failed");
    case MZ_ZIP_FILE_STAT_FAILED:
        return L("file stat failed");
    case MZ_ZIP_INVALID_PARAMETER:
        return L("invalid parameter");
    case MZ_ZIP_INVALID_FILENAME:
        return L("invalid filename");
    case MZ_ZIP_BUF_TOO_SMALL:
        return L("Buffer too small");
    case MZ_ZIP_INTERNAL_ERROR:
        return L("internal error");
    case MZ_ZIP_FILE_NOT_FOUND:
        return L("file not found");
    case MZ_ZIP_ARCHIVE_TOO_LARGE:
        return L("Archive too large");
    case MZ_ZIP_VALIDATION_FAILED:
        return L("validation failed");
    case MZ_ZIP_WRITE_CALLBACK_FAILED:
        return L("write callback failed");
    default:
        break;
    }

    return "unknown error";
}

} // namespace Slic3r