X-Git-Url: https://the.earth.li/gitweb/?a=blobdiff_plain;f=cleankey.c;h=c7a69be28e78d2f124acb6a880573ccdcc429e32;hb=2708d5a06ad2ef872ea89aca822328f98a86e7cb;hp=3ef76f9167679b61316f03f817fd81816ac7437c;hpb=a0d1c99184eeb07a6a7711e168c3db4b8c0937eb;p=onak.git

diff --git a/cleankey.c b/cleankey.c
index 3ef76f9..c7a69be 100644
--- a/cleankey.c
+++ b/cleankey.c
@@ -26,7 +26,7 @@
 #include "log.h"
 #include "mem.h"
 #include "merge.h"
-#include "onak-conf.h"
+#include "openpgp.h"
 #include "sigcheck.h"
 
 /**
@@ -179,6 +179,54 @@ int clean_key_sighashes(struct openpgp_publickey *key)
 	return removed;
 }
 
+#define UAT_LIMIT	0xFFFF
+#define UID_LIMIT	1024
+#define PACKET_LIMIT	8383		/* Fits in 2 byte packet length */
+int clean_large_packets(struct openpgp_publickey *key)
+{
+	struct openpgp_signedpacket_list **curuid = NULL;
+	struct openpgp_signedpacket_list *tmp = NULL;
+	bool                              drop;
+	int                               dropped = 0;
+
+	log_assert(key != NULL);
+	curuid = &key->uids;
+	while (*curuid != NULL) {
+		drop = false;
+		switch ((*curuid)->packet->tag) {
+		case OPENPGP_PACKET_UID:
+			if ((*curuid)->packet->length > UID_LIMIT)
+				drop = true;
+			break;
+		case OPENPGP_PACKET_UAT:
+			if ((*curuid)->packet->length > UAT_LIMIT)
+				drop = true;
+			break;
+		default:
+			if ((*curuid)->packet->length > PACKET_LIMIT)
+				drop = true;
+			break;
+		}
+
+		if (drop) {
+			logthing(LOGTHING_INFO,
+					"Dropping large (%d) packet, type %d",
+					(*curuid)->packet->length,
+					(*curuid)->packet->tag);
+			/* Remove the entire large signed packet list */
+			tmp = *curuid;
+			*curuid = (*curuid)->next;
+			tmp->next = NULL;
+			free_signedpacket_list(tmp);
+			dropped++;
+		} else {
+			curuid = &(*curuid)->next;
+		}
+	}
+
+	return dropped;
+}
+
 /**
  *	cleankeys - Apply all available cleaning options on a list of keys.
  *	@policies: The cleaning policies to apply.
@@ -191,23 +239,37 @@ int clean_key_sighashes(struct openpgp_publickey *key)
  */
 int cleankeys(struct openpgp_publickey **keys, uint64_t policies)
 {
-	struct openpgp_publickey *curkey;
-	int changed = 0, count;
+	struct openpgp_publickey **curkey, *tmp;
+	int changed = 0, count = 0;
 
 	if (keys == NULL)
 		return 0;
 
-	curkey = *keys;
-	while (curkey != NULL) {
-		count = dedupuids(curkey);
-		count += dedupsubkeys(curkey);
+	curkey = keys;
+	while (*curkey != NULL) {
+		if (policies & ONAK_CLEAN_DROP_V3_KEYS) {
+			if ((*curkey)->publickey->data[0] < 4) {
+				/* Remove the key from the list */
+				tmp = *curkey;
+				*curkey = tmp->next;
+				tmp->next = NULL;
+				free_publickey(tmp);
+				changed++;
+				continue;
+			}
+		}
+		if (policies & ONAK_CLEAN_LARGE_PACKETS) {
+			count += clean_large_packets(*curkey);
+		}
+		count += dedupuids(*curkey);
+		count += dedupsubkeys(*curkey);
 		if (policies & ONAK_CLEAN_CHECK_SIGHASH) {
-			count += clean_key_sighashes(curkey);
+			count += clean_key_sighashes(*curkey);
 		}
 		if (count > 0) {
 			changed++;
 		}
-		curkey = curkey->next;
+		curkey = &(*curkey)->next;
 	}
 
 	return changed;