63 lines
2.0 KiB
Python
63 lines
2.0 KiB
Python
import base64
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import re
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from typing import Optional
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from mitmproxy import ctx
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from mitmproxy import exceptions
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from mitmproxy import http
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from mitmproxy.proxy import mode_specs
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from mitmproxy.utils import strutils
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def parse_upstream_auth(auth: str) -> bytes:
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pattern = re.compile(".+:")
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if pattern.search(auth) is None:
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raise exceptions.OptionsError("Invalid upstream auth specification: %s" % auth)
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return b"Basic" + b" " + base64.b64encode(strutils.always_bytes(auth))
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class UpstreamAuth:
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"""
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This addon handles authentication to systems upstream from us for the
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upstream proxy and reverse proxy mode. There are 3 cases:
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- Upstream proxy CONNECT requests should have authentication added, and
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subsequent already connected requests should not.
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- Upstream proxy regular requests
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- Reverse proxy regular requests (CONNECT is invalid in this mode)
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"""
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auth: bytes | None = None
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def load(self, loader):
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loader.add_option(
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"upstream_auth",
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Optional[str],
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None,
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"""
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Add HTTP Basic authentication to upstream proxy and reverse proxy
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requests. Format: username:password.
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""",
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)
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def configure(self, updated):
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if "upstream_auth" in updated:
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if ctx.options.upstream_auth is None:
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self.auth = None
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else:
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self.auth = parse_upstream_auth(ctx.options.upstream_auth)
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def http_connect_upstream(self, f: http.HTTPFlow):
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if self.auth:
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f.request.headers["Proxy-Authorization"] = self.auth
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def requestheaders(self, f: http.HTTPFlow):
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if self.auth:
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if (
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isinstance(f.client_conn.proxy_mode, mode_specs.UpstreamMode)
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and f.request.scheme == "http"
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):
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f.request.headers["Proxy-Authorization"] = self.auth
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elif isinstance(f.client_conn.proxy_mode, mode_specs.ReverseMode):
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f.request.headers["Authorization"] = self.auth
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