Add cert retrieval for requests (#5320)

* Add cert retrieval for requests

The authenticator.py code already retrieves credentials from the config
for every request based on url matching. This change makes the
authenticator also retrieve certs from the config for each request based
on url matching.

Also includes unit tests.

Co-authored-by: Tucker Beck <tucker.beck@gmail.com>

src/poetry/utils/authenticator.py

@@ -6,16 +6,21 @@ import urllib.parse
 
 from typing import TYPE_CHECKING
 from typing import Any
+from typing import Iterator
 
 import requests
 import requests.auth
 import requests.exceptions
 
 from poetry.exceptions import PoetryException
+from poetry.utils.helpers import get_cert
+from poetry.utils.helpers import get_client_cert
 from poetry.utils.password_manager import PasswordManager
 
 
 if TYPE_CHECKING:
+    from pathlib import Path
+
     from cleo.io.io import IO
 
     from poetry.config.config import Config
@@ -30,6 +35,7 @@ class Authenticator:
         self._io = io
         self._session = None
         self._credentials = {}
+        self._certs = {}
         self._password_manager = PasswordManager(self._config)
 
     def _log(self, message: str, level: str = "debug") -> None:
@@ -61,8 +67,16 @@ class Authenticator:
 
         proxies = kwargs.get("proxies", {})
         stream = kwargs.get("stream")
-        verify = kwargs.get("verify")
-        cert = kwargs.get("cert")
+
+        certs = self.get_certs_for_url(url)
+        verify = kwargs.get("verify") or certs.get("verify")
+        cert = kwargs.get("cert") or certs.get("cert")
+
+        if cert is not None:
+            cert = str(cert)
+
+        if verify is not None:
+            verify = str(verify)
 
         settings = session.merge_environment_settings(
             prepared_request.url, proxies, stream, verify, cert
@@ -157,7 +171,7 @@ class Authenticator:
             return auth
 
     def _get_credentials_for_netloc(self, netloc: str) -> tuple[str | None, str | None]:
-        for repository_name in self._config.get("repositories", []):
+        for repository_name, _ in self._get_repository_netlocs():
             auth = self._get_http_auth(repository_name, netloc)
 
             if auth is None:
@@ -167,6 +181,22 @@ class Authenticator:
 
         return None, None
 
+    def get_certs_for_url(self, url: str) -> dict[str, Path | None]:
+        parsed_url = urllib.parse.urlsplit(url)
+
+        netloc = parsed_url.netloc
+
+        return self._certs.setdefault(
+            netloc,
+            self._get_certs_for_netloc_from_config(netloc),
+        )
+
+    def _get_repository_netlocs(self) -> Iterator[tuple[str, str]]:
+        for repository_name in self._config.get("repositories", []):
+            url = self._config.get(f"repositories.{repository_name}.url")
+            parsed_url = urllib.parse.urlsplit(url)
+            yield repository_name, parsed_url.netloc
+
     def _get_credentials_for_netloc_from_keyring(
         self, url: str, netloc: str, username: str | None
     ) -> dict[str, str] | None:
@@ -193,3 +223,14 @@ class Authenticator:
             }
 
         return None
+
+    def _get_certs_for_netloc_from_config(self, netloc: str) -> dict[str, Path | None]:
+        certs = {"cert": None, "verify": None}
+
+        for repository_name, repository_netloc in self._get_repository_netlocs():
+            if netloc == repository_netloc:
+                certs["cert"] = get_client_cert(self._config, repository_name)
+                certs["verify"] = get_cert(self._config, repository_name)
+                break
+
+        return certs

tests/utils/test_authenticator.py

@@ -4,6 +4,7 @@ import re
 import uuid
 
 from dataclasses import dataclass
+from pathlib import Path
 from typing import TYPE_CHECKING
 from typing import Any
 
@@ -306,3 +307,46 @@ def test_authenticator_uses_env_provided_credentials(
     request = http.last_request()
 
     assert request.headers["Authorization"] == "Basic YmFyOmJheg=="
+
+
+@pytest.mark.parametrize(
+    "cert,client_cert",
+    [
+        (None, None),
+        (None, "path/to/provided/client-cert"),
+        ("/path/to/provided/cert", None),
+        ("/path/to/provided/cert", "path/to/provided/client-cert"),
+    ],
+)
+def test_authenticator_uses_certs_from_config_if_not_provided(
+    config: Config,
+    mock_remote: type[httpretty.httpretty],
+    http: type[httpretty.httpretty],
+    mocker: MockerFixture,
+    cert: str | None,
+    client_cert: str | None,
+):
+    configured_cert = "/path/to/cert"
+    configured_client_cert = "/path/to/client-cert"
+    config.merge(
+        {
+            "repositories": {"foo": {"url": "https://foo.bar/simple/"}},
+            "http-basic": {"foo": {"username": "bar", "password": "baz"}},
+            "certificates": {
+                "foo": {"cert": configured_cert, "client-cert": configured_client_cert}
+            },
+        }
+    )
+
+    authenticator = Authenticator(config, NullIO())
+    session_send = mocker.patch.object(authenticator.session, "send")
+    authenticator.request(
+        "get",
+        "https://foo.bar/files/foo-0.1.0.tar.gz",
+        verify=cert,
+        cert=client_cert,
+    )
+    kwargs = session_send.call_args[1]
+
+    assert Path(kwargs["verify"]) == Path(cert or configured_cert)
+    assert Path(kwargs["cert"]) == Path(client_cert or configured_client_cert)