mirror of
https://github.com/home-assistant/core.git
synced 2025-12-20 10:59:24 +00:00
47 lines
1.4 KiB
Python
47 lines
1.4 KiB
Python
"""Helper to create SSL contexts."""
|
|
import ssl
|
|
|
|
import certifi
|
|
|
|
|
|
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)
|
|
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:
|
|
https://wiki.mozilla.org/Security/Server_Side_TLS
|
|
Modern guidelines are followed.
|
|
"""
|
|
context = ssl.SSLContext(ssl.PROTOCOL_TLS) # pylint: disable=no-member
|
|
|
|
context.options |= (
|
|
ssl.OP_NO_SSLv2 | ssl.OP_NO_SSLv3 |
|
|
ssl.OP_NO_TLSv1 | ssl.OP_NO_TLSv1_1
|
|
)
|
|
if hasattr(ssl, 'OP_NO_COMPRESSION'):
|
|
context.options |= ssl.OP_NO_COMPRESSION
|
|
|
|
context.set_ciphers(
|
|
"ECDHE-ECDSA-AES256-GCM-SHA384:ECDHE-RSA-AES256-GCM-SHA384:"
|
|
"ECDHE-ECDSA-CHACHA20-POLY1305:ECDHE-RSA-CHACHA20-POLY1305:"
|
|
"ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES128-GCM-SHA256:"
|
|
"ECDHE-ECDSA-AES256-SHA384:ECDHE-RSA-AES256-SHA384:"
|
|
"ECDHE-ECDSA-AES128-SHA256:ECDHE-RSA-AES128-SHA256"
|
|
)
|
|
return context
|