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Move to TLS client protocol for http connections #191

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Move to TLS client protocol for http connections #191

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4 changes: 3 additions & 1 deletion duo_client/https_wrapper.py
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Original file line number Diff line number Diff line change
Expand Up @@ -69,13 +69,15 @@ def __init__(self, host, port=None, key_file=None, cert_file=None,
can't be parsed as a valid HTTP/1.0 or 1.1 status line.
"""
six.moves.http_client.HTTPConnection.__init__(self, host, port, strict, **kwargs)
context = ssl.SSLContext(ssl.PROTOCOL_SSLv23)
context = ssl.SSLContext(ssl.PROTOCOL_TLS_CLIENT)
if cert_file:
context.load_cert_chain(cert_file, key_file)
if ca_certs:
context.verify_mode = ssl.CERT_REQUIRED
context.load_verify_locations(cafile=ca_certs)
else:
# Can't check hostnames if we're not requiring server certificates
context.check_hostname = False
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@AaronAtDuo AaronAtDuo Jan 25, 2023 •
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PROTOCOL_TLS_CLIENT automatically makes check_hostname True (side note, that means PROTOCOL_SSLv23 and PROTOCOL_TLS don't?) but if we don't require certs, we obviously can't required hostname checking.

context.verify_mode = ssl.CERT_NONE

ssl_version_blacklist = ssl.OP_NO_SSLv2 | ssl.OP_NO_SSLv3
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