Method load_header

key.cpp:200–248

}

void		Key_file::load_header (std::istream& in)
{
	while (true) {
		uint32_t	field_id;
		if (!read_be32(in, field_id)) {
			throw Malformed();
		}
		if (field_id == HEADER_FIELD_END) {
			break;
		}
		uint32_t	field_len;
		if (!read_be32(in, field_len)) {
			throw Malformed();
		}

		if (field_id == HEADER_FIELD_KEY_NAME) {
			if (field_len > KEY_NAME_MAX_LEN) {
				throw Malformed();
			}
			if (field_len == 0) {
				// special case field_len==0 to avoid possible undefined behavior
				// edge cases with an empty std::vector (particularly, &bytes[0]).
				key_name.clear();
			} else {
				std::vector<char>	bytes(field_len);
				in.read(&bytes[0], field_len);
				if (in.gcount() != static_cast<std::streamsize>(field_len)) {
					throw Malformed();
				}
				key_name.assign(&bytes[0], field_len);
			}
			if (!validate_key_name(key_name.c_str())) {
				key_name.clear();
				throw Malformed();
			}
		} else if (field_id & 1) { // unknown critical field
			throw Incompatible();
		} else {
			// unknown non-critical field - safe to ignore
			if (field_len > MAX_FIELD_LEN) {
				throw Malformed();
			}
			in.ignore(field_len);
			if (in.gcount() != static_cast<std::streamsize>(field_len)) {
				throw Malformed();
			}
		}
	}
}

void		Key_file::store (std::ostream& out) const
{