From: Jonathan McDowell <noodles@earth.li>
Date: Sat, 2 Jan 2021 11:31:27 +0000 (+0000)
Subject: Don't take creation time from unhashed subpackets
X-Git-Tag: onak-0.6.2~8
X-Git-Url: https://the.earth.li/gitweb/?p=onak.git;a=commitdiff_plain;h=b817e792ee453485b117eefad128971c59ea576f

Don't take creation time from unhashed subpackets

When looking at the subpackets for a signature don't use the unhashed
set to obtain the creation time, and only use them for the keyid if it
wasn't present in the hashed section.

Fixes #3
---

diff --git a/decodekey.c b/decodekey.c
index 481b8aa..f8cc407 100644
--- a/decodekey.c
+++ b/decodekey.c
@@ -230,17 +230,27 @@ onak_status_t sig_info(struct openpgp_packet *packet, uint64_t *keyid,
 			break;
 		case 4:
 		case 5:
+			if (keyid != NULL) {
+				*keyid = 0;
+			}
 			res = parse_subpackets(&packet->data[4],
 					packet->length - 4,
 					&length, keyid, creation);
 			if (res != ONAK_E_OK) {
 				return res;
 			}
-			res = parse_subpackets(&packet->data[length + 4],
-					packet->length - (4 + length),
-					&length, keyid, creation);
-			if (res != ONAK_E_OK) {
-				return res;
+			/*
+			 * Only look at the unhashed subpackets if we want the
+			 * keyid and it wasn't in the signed subpacket
+			 * section.
+			 */
+			if (keyid != NULL && *keyid == 0) {
+				res = parse_subpackets(&packet->data[length + 4],
+						packet->length - (4 + length),
+						&length, keyid, NULL);
+				if (res != ONAK_E_OK) {
+					return res;
+				}
 			}
 			break;
 		default: