Method write_updated_config_file

libcppcryptfs/config/cryptconfig.cpp:398–586

}

bool CryptConfig::write_updated_config_file(const char *base64key, const char *scryptSalt, int scryptn)
{
	bool bret = true;
	
	try {
		
		wstring vol = m_VolumeName;

		string volume_name_utf8_enc;

		// if we're recovering a filesystem then base64key isn't null, and we can't decrypt the volume name.
		// so ignore the volume name.
		if (!base64key) {
			if (vol.size() > 0) {
				if (vol.size() > MAX_VOLUME_NAME_LENGTH)
					vol.erase(MAX_VOLUME_NAME_LENGTH, wstring::npos);
				if (!encrypt_string_gcm(vol, GetGcmContentKey(), volume_name_utf8_enc)) {
					throw(-1);
				}
			}
		}

		if (m_configPath.size() < 1)
			throw(-1);

		wstring config_path = m_configPath;

		const WCHAR *path = &config_path[0];

		auto File = cppcryptfs::unique_ptr<FILE>(_wfopen_s, fclose, path, L"rb");
		auto fl = File.get();

		if (!fl)
			throw(-1);

		if (fseek(fl, 0, SEEK_END))
			throw(-1);

		long filesize = ftell(fl);

		if (filesize < 0)
			throw(-1);

		if (filesize > MAX_CONFIG_FILE_SIZE)
			throw(-1);

		if (fseek(fl, 0, SEEK_SET))
			throw(-1);

		std::vector<char> buf(filesize+1);

		size_t len = fread(&buf[0], 1, filesize, fl);

		File.reset();

		if (len < 0)
			throw(-1);