8000 Allow less modern ciphers for outgoing connections by balloob · Pull Request #15546 · home-assistant/core · GitHub
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Allow less modern ciphers for outgoing connections #15546

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Merged
merged 1 commit into from
Jul 18, 2018
Merged

Allow less modern ciphers for outgoing connections #15546

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18 changes: 6 additions & 12 deletions homeassistant/util/ssl.py
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Original file line number Diff line number Diff line change
Expand Up @@ -6,21 +6,14 @@

def client_context():
"""Return an SSL context for making requests."""
context = _get_context()
context.verify_mode = ssl.CERT_REQUIRED
context.check_hostname = True
context.load_verify_locations(cafile=certifi.where(), capath=None)
context = ssl.create_default_context(
purpose=ssl.Purpose.SERVER_AUTH,
cafile=certifi.where()
)
return context


def server_context():
"""Return an SSL context for being a server."""
context = _get_context()
context.options |= ssl.OP_CIPHER_SERVER_PREFERENCE
return context


def _get_context():
"""Return an SSL context following the Mozilla recommendations.

TLS configuration follows the best-practice guidelines specified here:
Expand All @@ -31,7 +24,8 @@ def _get_context():

context.options |= (
ssl.OP_NO_SSLv2 | ssl.OP_NO_SSLv3 |
ssl.OP_NO_TLSv1 | ssl.OP_NO_TLSv1_1
ssl.OP_NO_TLSv1 | ssl.OP_NO_TLSv1_1 |
ssl.OP_CIPHER_SERVER_PREFERENCE
)
if hasattr(ssl, 'OP_NO_COMPRESSION'):
context.options |= ssl.OP_NO_COMPRESSION
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0