From 73f99d117f06ef3c5d8833d221adc16025fbd620 Mon Sep 17 00:00:00 2001
From: FUTATSUKI Yasuhito <futatuki@yf.bsdclub.org>
Date: Tue, 10 Sep 2024 04:10:40 +0900
Subject: [PATCH] Accept no-result Authentication-Results: header

* opendmarc/opendmarc-ar.c (ares_parse): As above.
---
 opendmarc/opendmarc-ar.c | 18 ++++++++++++++++--
 1 file changed, 16 insertions(+), 2 deletions(-)

diff --git a/opendmarc/opendmarc-ar.c b/opendmarc/opendmarc-ar.c
index c76a0ff7..7e947594 100644
--- a/opendmarc/opendmarc-ar.c
+++ b/opendmarc/opendmarc-ar.c
@@ -422,7 +422,7 @@ ares_parse(u_char *hdr, struct authres *ar)
 			if (tokens[c][0] == ';')
 			{
 				prevstate = state;
-				state = 3;
+				state = 14;
 			}
 			else if (isascii(tokens[c][0]) &&
 			         isdigit(tokens[c][0]))
@@ -447,10 +447,20 @@ ares_parse(u_char *hdr, struct authres *ar)
 				return -1;
 
 			prevstate = state;
-			state = 3;
+			state = 14;
 
 			break;
 
+		  case 14:				/* method or "none" */
+			if (strcasecmp((char *) tokens[c], "none") == 0)
+			{
+				prevstate = state;
+				state = 15;
+				continue;
+			}
+
+			/* FALLTHROUGH */
+
 		  case 3:				/* method */
 			n++;
 			r = 0;
@@ -619,6 +629,10 @@ ares_parse(u_char *hdr, struct authres *ar)
 			}
 
 			break;
+
+		  case 15:				/* terminal state after no-result */
+			/* any token should not appear */
+			return -1;
 		}
 	}