fix: populate cert form email from index.txt emailAddress field on reissue

_parse_index_line now extracts the emailAddress segment from the DN
alongside CN, returning a (cn, expiry, email) triple. CertInfo gains an
email field populated by both load functions.

In _main(), RENEW_SELECTED falls back to cert.email when the metadata
store has no entry for the CN — so certs created outside this tool (or
before the metadata store existed) pre-fill the email field correctly.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

openvpncertupdate.py

@@ -65,6 +65,7 @@ class CertInfo:
     cn: str
     expires: datetime  # UTC
     days_left: int     # negative = already expired
+    email: str = ""
 
 
 def _parse_date(raw: str) -> datetime:
@@ -80,8 +81,8 @@ def _parse_date(raw: str) -> datetime:
     return dt.replace(tzinfo=timezone.utc)
 
 
-def _parse_index_line(line: str) -> Optional[tuple[str, datetime]]:
-    """Return (cn, expiry) for valid (V-status) index.txt lines, else None."""
+def _parse_index_line(line: str) -> Optional[tuple[str, datetime, str]]:
+    """Return (cn, expiry, email) for valid (V-status) index.txt lines, else None."""
     parts = line.rstrip("\n").split("\t")
     if len(parts) < 6 or parts[0] != "V":
         return None
@@ -91,13 +92,15 @@ def _parse_index_line(line: str) -> Optional[tuple[str, datetime]]:
         return None
     dn = parts[5]
     cn = None
+    email = ""
     for seg in dn.split("/"):
         if seg.startswith("CN="):
             cn = seg[3:]
-            break
+        elif seg.startswith("emailAddress="):
+            email = seg[len("emailAddress="):]
     if not cn:
         return None
-    return cn, expiry
+    return cn, expiry, email
 
 
 def load_expiring_certs(
@@ -115,12 +118,13 @@ def load_expiring_certs(
             parsed = _parse_index_line(line)
             if parsed is None:
                 continue
-            cn, expiry = parsed
+            cn, expiry, email = parsed
             if cutoff_past <= expiry <= cutoff_future:
                 results.append(CertInfo(
                     cn=cn,
                     expires=expiry,
                     days_left=(expiry - now).days,
+                    email=email,
                 ))
     results.sort(key=lambda c: c.expires)
     return results
@@ -135,11 +139,12 @@ def load_all_certs(pki_dir: str) -> list[CertInfo]:
             parsed = _parse_index_line(line)
             if parsed is None:
                 continue
-            cn, expiry = parsed
+            cn, expiry, email = parsed
             results.append(CertInfo(
                 cn=cn,
                 expires=expiry,
                 days_left=(expiry - now).days,
+                email=email,
             ))
     results.sort(key=lambda c: c.expires)
     return results
@@ -850,8 +855,11 @@ class CursesApp:
             elif result.action == Action.NEW_CERT:
                 self._process_cert(stdscr, cn="", email="", is_renewal=False)
             elif result.action == Action.RENEW_SELECTED:
+                cert_by_cn = {c.cn: c for c in certs}
                 for cn in result.selected_cns:
                     email_addr = get_email(EASYRSA_PKI_DIR, cn)
+                    if not email_addr and cn in cert_by_cn:
+                        email_addr = cert_by_cn[cn].email
                     if not self._process_cert(stdscr, cn=cn, email=email_addr,
                                               is_renewal=True):
                         break

tests/test_pki.py

@@ -54,9 +54,40 @@ def test_parse_4digit_year():
     line = "V\t20251231120000Z\t\t07\tunknown\t/CN=future"
     result = _parse_index_line(line)
     assert result is not None
-    cn, dt = result
+    cn, dt, email = result
     assert cn == "future"
     assert dt.year == 2025
+    assert email == ""
+
+
+def test_parse_email_from_dn():
+    line = "V\t20251231120000Z\t\t07\tunknown\t/CN=alice/emailAddress=alice@example.com"
+    result = _parse_index_line(line)
+    assert result is not None
+    cn, dt, email = result
+    assert cn == "alice"
+    assert email == "alice@example.com"
+
+
+def test_parse_email_absent_returns_empty():
+    line = "V\t20251231120000Z\t\t07\tunknown\t/CN=bob"
+    result = _parse_index_line(line)
+    assert result is not None
+    cn, dt, email = result
+    assert cn == "bob"
+    assert email == ""
+
+
+def test_load_expiring_certs_populates_email(tmp_path):
+    now = datetime.now(tz=timezone.utc)
+    pki = tmp_path / "pki"
+    pki.mkdir()
+    expiry = now + timedelta(days=5)
+    line = f"V\t{expiry.strftime('%y%m%d%H%M%S')}Z\t\t01\tunknown\t/CN=carol/emailAddress=carol@example.com\n"
+    (pki / "index.txt").write_text(line)
+    certs = load_expiring_certs(str(pki), days_past=0, days_ahead=14)
+    assert len(certs) == 1
+    assert certs[0].email == "carol@example.com"
 
 
 def test_load_all_certs_includes_all_valid(tmp_path):