# -*- coding: utf-8 -*- import pytest import env # noqa: F401 from pybind11_tests import call_policies as m from pybind11_tests import ConstructorStats @pytest.mark.xfail("env.PYPY", reason="sometimes comes out 1 off on PyPy", strict=False) def test_keep_alive_argument(capture): n_inst = ConstructorStats.detail_reg_inst() with capture: p = m.Parent() assert capture == "Allocating parent." with capture: p.addChild(m.Child()) assert ConstructorStats.detail_reg_inst() == n_inst + 1 assert ( capture == """ Allocating child. Releasing child. """ ) with capture: del p assert ConstructorStats.detail_reg_inst() == n_inst assert capture == "Releasing parent." with capture: p = m.Parent() assert capture == "Allocating parent." with capture: p.addChildKeepAlive(m.Child()) assert ConstructorStats.detail_reg_inst() == n_inst + 2 assert capture == "Allocating child." with capture: del p assert ConstructorStats.detail_reg_inst() == n_inst assert ( capture == """ Releasing parent. Releasing child. """ ) def test_keep_alive_return_value(capture): n_inst = ConstructorStats.detail_reg_inst() with capture: p = m.Parent() assert capture == "Allocating parent." with capture: p.returnChild() assert ConstructorStats.detail_reg_inst() == n_inst + 1 assert ( capture == """ Allocating child. Releasing child. """ ) with capture: del p assert ConstructorStats.detail_reg_inst() == n_inst assert capture == "Releasing parent." with capture: p = m.Parent() assert capture == "Allocating parent." with capture: p.returnChildKeepAlive() assert ConstructorStats.detail_reg_inst() == n_inst + 2 assert capture == "Allocating child." with capture: del p assert ConstructorStats.detail_reg_inst() == n_inst assert ( capture == """ Releasing parent. Releasing child. """ ) # https://foss.heptapod.net/pypy/pypy/-/issues/2447 @pytest.mark.xfail("env.PYPY", reason="_PyObject_GetDictPtr is unimplemented") def test_alive_gc(capture): n_inst = ConstructorStats.detail_reg_inst() p = m.ParentGC() p.addChildKeepAlive(m.Child()) assert ConstructorStats.detail_reg_inst() == n_inst + 2 lst = [p] lst.append(lst) # creates a circular reference with capture: del p, lst assert ConstructorStats.detail_reg_inst() == n_inst assert ( capture == """ Releasing parent. Releasing child. """ ) def test_alive_gc_derived(capture): class Derived(m.Parent): pass n_inst = ConstructorStats.detail_reg_inst() p = Derived() p.addChildKeepAlive(m.Child()) assert ConstructorStats.detail_reg_inst() == n_inst + 2 lst = [p] lst.append(lst) # creates a circular reference with capture: del p, lst assert ConstructorStats.detail_reg_inst() == n_inst assert ( capture == """ Releasing parent. Releasing child. """ ) def test_alive_gc_multi_derived(capture): class Derived(m.Parent, m.Child): def __init__(self): m.Parent.__init__(self) m.Child.__init__(self) n_inst = ConstructorStats.detail_reg_inst() p = Derived() p.addChildKeepAlive(m.Child()) # +3 rather than +2 because Derived corresponds to two registered instances assert ConstructorStats.detail_reg_inst() == n_inst + 3 lst = [p] lst.append(lst) # creates a circular reference with capture: del p, lst assert ConstructorStats.detail_reg_inst() == n_inst assert ( capture == """ Releasing parent. Releasing child. Releasing child. """ ) def test_return_none(capture): n_inst = ConstructorStats.detail_reg_inst() with capture: p = m.Parent() assert capture == "Allocating parent." with capture: p.returnNullChildKeepAliveChild() assert ConstructorStats.detail_reg_inst() == n_inst + 1 assert capture == "" with capture: del p assert ConstructorStats.detail_reg_inst() == n_inst assert capture == "Releasing parent." with capture: p = m.Parent() assert capture == "Allocating parent." with capture: p.returnNullChildKeepAliveParent() assert ConstructorStats.detail_reg_inst() == n_inst + 1 assert capture == "" with capture: del p assert ConstructorStats.detail_reg_inst() ==
.. hazmat::

Asymmetric Utilities
====================

.. currentmodule:: cryptography.hazmat.primitives.asymmetric.utils


.. function:: decode_dss_signature(signature)

    Takes in signatures generated by the DSA/ECDSA signers and returns a
    tuple ``(r, s)``. These signatures are ASN.1 encoded ``Dss-Sig-Value``
    sequences (as defined in :rfc:`3279`)

    :param bytes signature: The signature to decode.

    :returns: The decoded tuple ``(r, s)``.

    :raises ValueError: Raised if the signature is malformed.

.. function:: encode_dss_signature(r, s)

    Creates an ASN.1 encoded ``Dss-Sig-Value`` (as defined in :rfc:`3279`) from
    raw ``r`` and ``s`` values.

    :param int r: The raw signature value ``r``.

    :param int s: The raw signature value ``s``.

    :return bytes: The encoded signature.
generated by cgit v1.2.3 (git 2.25.1) at 2025-06-02 07:30:12 +0000