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authorTimshel <Timshel@users.noreply.github.com>2024-05-08 15:56:16 +0200
committerGitHub <noreply@github.com>2024-05-08 13:56:16 +0000
commit34a8652366c60d785e5c0510749e615d0dec9ec0 (patch)
tree7ec986f3c034b9f723ba72cfd37657f5d13eac4a
parentUpdate PyO3 to 0.21 (#17162) (diff)
downloadsynapse-34a8652366c60d785e5c0510749e615d0dec9ec0.tar.xz
Optional whitespace support in Authorization (#1350) (#17145)
Co-authored-by: Andrew Morgan <1342360+anoadragon453@users.noreply.github.com>
-rw-r--r--changelog.d/17145.bugfix1
-rw-r--r--synapse/federation/transport/server/_base.py6
-rw-r--r--tests/federation/transport/server/test__base.py7
3 files changed, 13 insertions, 1 deletions
diff --git a/changelog.d/17145.bugfix b/changelog.d/17145.bugfix
new file mode 100644
index 0000000000..5c1e600f4e
--- /dev/null
+++ b/changelog.d/17145.bugfix
@@ -0,0 +1 @@
+Add support for optional whitespace around the Federation API's `Authorization` header's parameter commas.
diff --git a/synapse/federation/transport/server/_base.py b/synapse/federation/transport/server/_base.py
index 23d1254127..db0f5076a9 100644
--- a/synapse/federation/transport/server/_base.py
+++ b/synapse/federation/transport/server/_base.py
@@ -180,7 +180,11 @@ def _parse_auth_header(header_bytes: bytes) -> Tuple[str, str, str, Optional[str
     """
     try:
         header_str = header_bytes.decode("utf-8")
-        params = re.split(" +", header_str)[1].split(",")
+        space_or_tab = "[ \t]"
+        params = re.split(
+            rf"{space_or_tab}*,{space_or_tab}*",
+            re.split(r"^X-Matrix +", header_str, maxsplit=1)[1],
+        )
         param_dict: Dict[str, str] = {
             k.lower(): v for k, v in [param.split("=", maxsplit=1) for param in params]
         }
diff --git a/tests/federation/transport/server/test__base.py b/tests/federation/transport/server/test__base.py
index 065e85957e..0e3b41ec4d 100644
--- a/tests/federation/transport/server/test__base.py
+++ b/tests/federation/transport/server/test__base.py
@@ -147,3 +147,10 @@ class BaseFederationAuthorizationTests(unittest.TestCase):
             ),
             ("foo", "ed25519:1", "sig", "bar"),
         )
+        # test that "optional whitespace(s)" (space and tabulation) are allowed between comma-separated auth-param components
+        self.assertEqual(
+            _parse_auth_header(
+                b'X-Matrix origin=foo , key="ed25519:1",  sig="sig",	destination="bar",		extra_field=ignored'
+            ),
+            ("foo", "ed25519:1", "sig", "bar"),
+        )