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"""
This inline script allows conditional TLS Interception based
on a user-defined strategy.

Example:

    > mitmdump -s tls_passthrough.py

    1. curl --proxy http://localhost:8080 https://example.com --insecure
    // works - we'll also see the contents in mitmproxy

    2. curl --proxy http://localhost:8080 https://example.com --insecure
    // still works - we'll also see the contents in mitmproxy

    3. curl --proxy http://localhost:8080 https://example.com
    // fails with a certificate error, which we will also see in mitmproxy

    4. curl --proxy http://localhost:8080 https://example.com
    // works again, but mitmproxy does not intercept and we do *not* see the contents

Authors: Maximilian Hils, Matthew Tuusberg
"""
import collections
import random

from enum import Enum

import mitmproxy
from mitmproxy import ctx
from mitmproxy.exceptions import TlsProtocolException
from mitmproxy.proxy.protocol import TlsLayer, RawTCPLayer


class InterceptionResult(Enum):
    success = True
    failure = False
    skipped = None


class _TlsStrategy:
    """
    Abstract base class for interception strategies.
    """

    def __init__(self):
        # A server_address -> interception results mapping
        self.history = collections.defaultdict(lambda: collections.deque(maxlen=200))


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