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add timeout parameter for get_server_certificate in #76051

nixawk mannequin opened this issue Oct 26, 2017 · 4 comments

add timeout parameter for get_server_certificate in #76051

nixawk mannequin opened this issue Oct 26, 2017 · 4 comments
3.10 expert-SSL type-feature


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@nixawk nixawk mannequin commented Oct 26, 2017

BPO 31870
Nosy @tiran, @alex, @dstufft, @nixawk, @ZackerySpytz, @miss-islington
  • #4126
  • #22270
  • #25570
  • Files
  • Added timeout support for func get_server_certificate in ssl module.
  • Note: these values reflect the state of the issue at the time it was migrated and might not reflect the current state.

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    GitHub fields:

    assignee = ''
    closed_at = <Date 2021-04-24.04:57:49.322>
    created_at = <Date 2017-10-26.04:11:25.449>
    labels = ['expert-SSL', 'type-feature', '3.10']
    title = 'add timeout parameter for get_server_certificate in'
    updated_at = <Date 2021-04-24.05:54:11.227>
    user = '' fields:

    activity = <Date 2021-04-24.05:54:11.227>
    actor = 'christian.heimes'
    assignee = 'christian.heimes'
    closed = True
    closed_date = <Date 2021-04-24.04:57:49.322>
    closer = 'christian.heimes'
    components = ['SSL']
    creation = <Date 2017-10-26.04:11:25.449>
    creator = 'Nixawk'
    dependencies = []
    files = ['47238']
    hgrepos = []
    issue_num = 31870
    keywords = ['patch']
    message_count = 4.0
    messages = ['305021', '312879', '391758', '391760']
    nosy_count = 7.0
    nosy_names = ['janssen', 'christian.heimes', 'alex', 'dstufft', 'Nixawk', 'ZackerySpytz', 'miss-islington']
    pr_nums = ['4126', '22270', '25570']
    priority = 'normal'
    resolution = 'fixed'
    stage = 'resolved'
    status = 'closed'
    superseder = None
    type = 'enhancement'
    url = ''
    versions = ['Python 3.10']

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    @nixawk nixawk mannequin commented Oct 26, 2017

    The original get_server_certificate in does not support socket timeout,

    def get_server_certificate(addr, ssl_version=PROTOCOL_TLS, ca_certs=None):
        """Retrieve the certificate from the server at the specified address,
        and return it as a PEM-encoded string.
        If 'ca_certs' is specified, validate the server cert against it.
        If 'ssl_version' is specified, use it in the connection attempt."""
    host, port = addr
    if ca_certs is not None:
        cert_reqs = CERT_REQUIRED
        cert_reqs = CERT_NONE
    context = _create_stdlib_context(ssl_version,
    with  create_connection(addr) as sock:
        with context.wrap_socket(sock) as sslsock:
            dercert = sslsock.getpeercert(True)
    return DER_cert_to_PEM_cert(dercert)

    If a timeout parameter, a sample demo can be here:

    >>> import ssl
    >>> ssl.get_server_certificate(("", 443), timeout=6)
    Traceback (most recent call last):
      File "<stdin>", line 1, in <module>
      File "/usr/lib/python2.7/", line 1017, in get_server_certificate
        with closing(create_connection(addr, timeout)) as sock:
      File "/usr/lib/python2.7/", line 575, in create_connection
        raise err
    socket.error: [Errno 101] Network is unreachable

    @nixawk nixawk mannequin added stdlib type-feature labels Oct 26, 2017
    @tiran tiran added expert-SSL 3.7 and removed stdlib labels Nov 3, 2017
    @tiran tiran self-assigned this Nov 3, 2017
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    @tiran tiran commented Feb 26, 2018

    It's too late to land a new feature in 3.7.

    @tiran tiran added 3.8 and removed 3.7 labels Feb 26, 2018
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    @miss-islington miss-islington commented Apr 24, 2021

    New changeset b2fac1a by Zackery Spytz in branch 'master':
    bpo-31870: Add a timeout parameter to ssl.get_server_certificate() (GH-22270)

    @tiran tiran added 3.10 and removed 3.8 labels Apr 24, 2021
    @tiran tiran closed this as completed Apr 24, 2021
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    @tiran tiran commented Apr 24, 2021

    New changeset f05c2ae by Christian Heimes in branch 'master':
    bpo-31870: Fix test_get_server_certificate_timeout on Windows (GH-25570)

    @ezio-melotti ezio-melotti transferred this issue from another repository Apr 10, 2022
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