120 lines
4.2 KiB
Python
120 lines
4.2 KiB
Python
# -*- coding: utf-8 -*-
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#
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# test_io_error_mapping.py
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#
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# Copyright (C) 2006-2020 wolfSSL Inc.
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#
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# This file is part of wolfSSL. (formerly known as CyaSSL)
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#
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# wolfSSL is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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#
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# wolfSSL is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
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# pylint: disable=missing-docstring, invalid-name, import-error
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# pylint: disable=protected-access
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"""
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These tests exercise the error-code-to-exception mapping in SSLSocket's
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read/write/recv_into. wolfSSL_write can return WANT_READ and wolfSSL_read can
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return WANT_WRITE during a renegotiation; non-blocking callers rely on these
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being surfaced as SSLWantReadError / SSLWantWriteError (matching the stdlib
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ssl module) rather than a generic SSLError.
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The renegotiation conditions are awkward to force over a real socket, so the
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native wolfSSL_read/wolfSSL_write/wolfSSL_get_error functions are stubbed to
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return the relevant codes and the Python-level mapping is verified directly.
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"""
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from types import SimpleNamespace
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import pytest
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import wolfssl
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class _FakeLib:
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"""Stand-in for wolfssl._lib that forces a given I/O return / error."""
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def __init__(self, io_ret, err):
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self._io_ret = io_ret
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self._err = err
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def wolfSSL_write(self, ssl, data, length):
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return self._io_ret
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def wolfSSL_read(self, ssl, data, length):
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return self._io_ret
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def wolfSSL_get_error(self, ssl, ret):
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return self._err
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def _make_socket():
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"""A minimal, non-DTLS SSLSocket that skips __init__/native setup."""
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sock = wolfssl.SSLSocket.__new__(wolfssl.SSLSocket)
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sock.native_object = object() # non-NULL so _check_closed passes
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sock._connected = True # so _check_connected is a no-op
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sock._context = SimpleNamespace(protocol=wolfssl.PROTOCOL_TLS)
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# The dummy native_object isn't a real cdata pointer, so make __del__
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# a no-op to avoid wolfSSL_free() choking on it during GC.
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sock._release_native_object = lambda: None
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return sock
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def _patch_lib(monkeypatch, io_ret, err):
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monkeypatch.setattr(wolfssl, "_lib", _FakeLib(io_ret, err))
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def test_write_want_read_raises_wantread(monkeypatch):
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"""F-3905: wolfSSL_write returning WANT_READ -> SSLWantReadError."""
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_patch_lib(monkeypatch, -1, wolfssl._SSL_ERROR_WANT_READ)
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sock = _make_socket()
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with pytest.raises(wolfssl.SSLWantReadError):
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sock.write(b"data")
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def test_write_want_write_still_raises_wantwrite(monkeypatch):
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_patch_lib(monkeypatch, -1, wolfssl._SSL_ERROR_WANT_WRITE)
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sock = _make_socket()
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with pytest.raises(wolfssl.SSLWantWriteError):
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sock.write(b"data")
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def test_read_want_write_raises_wantwrite(monkeypatch):
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"""F-3906: wolfSSL_read returning WANT_WRITE -> SSLWantWriteError."""
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_patch_lib(monkeypatch, -1, wolfssl._SSL_ERROR_WANT_WRITE)
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sock = _make_socket()
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with pytest.raises(wolfssl.SSLWantWriteError):
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sock.read(16)
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def test_read_want_read_still_raises_wantread(monkeypatch):
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_patch_lib(monkeypatch, -1, wolfssl._SSL_ERROR_WANT_READ)
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sock = _make_socket()
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with pytest.raises(wolfssl.SSLWantReadError):
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sock.read(16)
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def test_recv_into_want_write_raises_wantwrite(monkeypatch):
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"""F-3907: wolfSSL_read in recv_into returning WANT_WRITE."""
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_patch_lib(monkeypatch, -1, wolfssl._SSL_ERROR_WANT_WRITE)
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sock = _make_socket()
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with pytest.raises(wolfssl.SSLWantWriteError):
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sock.recv_into(bytearray(16))
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def test_recv_into_want_read_still_raises_wantread(monkeypatch):
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_patch_lib(monkeypatch, -1, wolfssl._SSL_ERROR_WANT_READ)
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sock = _make_socket()
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with pytest.raises(wolfssl.SSLWantReadError):
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sock.recv_into(bytearray(16))
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