fix(egress-proxy-addon): wildcard hosts also match the apex
test / unit (pull_request) Successful in 17s
test / integration (pull_request) Successful in 1m6s

`*.example.com` now matches `example.com` itself in addition to
every subdomain. RFC 6125 TLS-wildcard semantics excluded the
apex; an allowlist's natural reading of `*.example.com` is "all
of example.com" — and the pipelock mirror already strips
`*.example.com` to `example.com`, so without the apex match the
two layers disagreed (pipelock allowed the apex, egress-proxy
blocked it).

Behavior:
  - `*.example.com` matches `example.com`     (apex)
  - `*.example.com` matches `foo.example.com` (subdomain)
  - `*.example.com` matches `a.b.example.com` (nested)
  - `*.example.com` does NOT match `barexample.com` (label
    boundary required)

Test renamed: `test_wildcard_does_not_match_apex` →
`test_wildcard_matches_apex`. 395 tests pass.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
This commit is contained in:
2026-05-25 19:16:33 -04:00
parent 811a6fbfe9
commit 6177c0518e
2 changed files with 18 additions and 9 deletions
+12 -7
View File
@@ -174,10 +174,15 @@ def match_route(
Match precedence:
1. Exact (case-insensitive) match on the literal hostname.
2. Wildcard match: a route whose host starts with `*.` is a
suffix pattern. `*.example.com` matches any host that
ends with `.example.com` (so `foo.example.com` and
`a.b.example.com`, but NOT the apex `example.com` or
`barexample.com`).
suffix pattern that covers the apex AND every subdomain.
`*.example.com` matches `example.com`, `foo.example.com`,
and `a.b.example.com`, but NOT `barexample.com` (the
label boundary `.` is required when matching a
subdomain). This is intentionally more permissive than
RFC 6125 TLS-wildcard semantics — an allowlist's natural
reading of `*.example.com` is "all of example.com",
apex included, and matches what the pipelock mirror does
(strips `*.example.com` → `example.com`).
Exact match wins over wildcard so an operator can declare a
specific route on top of a broader wildcard (e.g. a
@@ -189,12 +194,12 @@ def match_route(
host = r.host.lower()
if not host.startswith("*.") and host == target:
return r
# Pass 2: wildcard suffix match (`*.foo.com` → `.foo.com`).
# Pass 2: wildcard match — apex + every subdomain.
for r in routes:
host = r.host.lower()
if host.startswith("*."):
suffix = host[1:] # keeps the leading `.`
if target.endswith(suffix) and target != suffix[1:]:
suffix = host[2:] # strip the `*.`
if target == suffix or target.endswith("." + suffix):
return r
return None
+6 -2
View File
@@ -162,9 +162,13 @@ class TestMatchRouteWildcards(unittest.TestCase):
routes = (Route(host="*.example.com"),)
self.assertIsNotNone(match_route(routes, "a.b.example.com"))
def test_wildcard_does_not_match_apex(self):
def test_wildcard_matches_apex(self):
# Allowlist semantics: `*.example.com` covers
# `example.com` itself + every subdomain. Matches what
# the pipelock mirror does (strips `*.example.com` →
# `example.com`) so the two layers agree.
routes = (Route(host="*.example.com"),)
self.assertIsNone(match_route(routes, "example.com"))
self.assertIsNotNone(match_route(routes, "example.com"))
def test_wildcard_does_not_match_overlapping_suffix(self):
# `*.example.com` shouldn't match `barexample.com` — the