| from warnings import warn |
| |
| from six import PY3, binary_type, text_type |
| |
| from cryptography.hazmat.bindings.openssl.binding import Binding |
| binding = Binding() |
| ffi = binding.ffi |
| lib = binding.lib |
| |
| def exception_from_error_queue(exceptionType): |
| def text(charp): |
| return native(ffi.string(charp)) |
| |
| errors = [] |
| while True: |
| error = lib.ERR_get_error() |
| if error == 0: |
| break |
| errors.append(( |
| text(lib.ERR_lib_error_string(error)), |
| text(lib.ERR_func_error_string(error)), |
| text(lib.ERR_reason_error_string(error)))) |
| |
| raise exceptionType(errors) |
| |
| |
| |
| def native(s): |
| """ |
| Convert :py:class:`bytes` or :py:class:`unicode` to the native |
| :py:class:`str` type, using UTF-8 encoding if conversion is necessary. |
| |
| :raise UnicodeError: The input string is not UTF-8 decodeable. |
| |
| :raise TypeError: The input is neither :py:class:`bytes` nor |
| :py:class:`unicode`. |
| """ |
| if not isinstance(s, (binary_type, text_type)): |
| raise TypeError("%r is neither bytes nor unicode" % s) |
| if PY3: |
| if isinstance(s, binary_type): |
| return s.decode("utf-8") |
| else: |
| if isinstance(s, text_type): |
| return s.encode("utf-8") |
| return s |
| |
| |
| |
| if PY3: |
| def byte_string(s): |
| return s.encode("charmap") |
| else: |
| def byte_string(s): |
| return s |
| |
| _TEXT_WARNING = u"{} for {{}} is no longer accepted, use bytes".format( |
| text_type.__name__ |
| ) |
| |
| def warn_text(label, obj): |
| """ |
| If ``obj`` is text, emit a warning that it should be bytes instead and try |
| to convert it to bytes automatically. |
| |
| :param str label: The name of the parameter from which ``obj`` was taken |
| (so a developer can easily find the source of the problem and correct |
| it). |
| |
| :return: If ``obj`` is the text string type, a ``bytes`` object giving the |
| UTF-8 encoding of that text is returned. Otherwise, ``obj`` itself is |
| returned. |
| """ |
| if isinstance(obj, text_type): |
| warn( |
| _TEXT_WARNING.format(label), |
| category=DeprecationWarning, |
| stacklevel=3 |
| ) |
| return obj.encode('utf-8') |
| return obj |