mirror of https://github.com/scrapy/scrapy.git
30 lines
883 B
Python
30 lines
883 B
Python
from __future__ import annotations
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from pathlib import Path
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from typing import TYPE_CHECKING
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from OpenSSL import SSL
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from twisted.internet import ssl
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from scrapy.utils.python import to_bytes
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if TYPE_CHECKING:
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from twisted.internet.ssl import ContextFactory
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def ssl_context_factory(
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keyfile: str = "keys/localhost.key",
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certfile: str = "keys/localhost.crt",
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cipher_string: str | None = None,
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) -> ContextFactory:
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factory = ssl.DefaultOpenSSLContextFactory(
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str(Path(__file__).parent.parent / keyfile),
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str(Path(__file__).parent.parent / certfile),
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)
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if cipher_string:
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ctx = factory.getContext()
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# disabling TLS1.3 because it unconditionally enables some strong ciphers
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ctx.set_options(SSL.OP_CIPHER_SERVER_PREFERENCE | SSL.OP_NO_TLSv1_3)
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ctx.set_cipher_list(to_bytes(cipher_string))
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return factory
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