X-Git-Url: https://git.tcpdump.org/tcpdump/blobdiff_plain/8bacee1c8e56ff92253366edd22f95b6e2c5e055..e01c9bf76740802025c9328901b55ee4a0c49ed6:/print-isakmp.c

diff --git a/print-isakmp.c b/print-isakmp.c
index 9de9b75d..951c8a74 100644
--- a/print-isakmp.c
+++ b/print-isakmp.c
@@ -912,21 +912,25 @@ struct attrmap {
 
 static const u_char *
 ikev1_attrmap_print(netdissect_options *ndo,
-		    const u_char *p, const u_char *ep,
+		    const u_char *p, const u_char *ep2,
 		    const struct attrmap *map, size_t nmap)
 {
 	int totlen;
 	uint32_t t, v;
 
+	ND_TCHECK(p[0]);
 	if (p[0] & 0x80)
 		totlen = 4;
-	else
+	else {
+		ND_TCHECK_16BITS(&p[2]);
 		totlen = 4 + EXTRACT_16BITS(&p[2]);
-	if (ep < p + totlen) {
+	}
+	if (ep2 < p + totlen) {
 		ND_PRINT((ndo,"[|attr]"));
-		return ep + 1;
+		return ep2 + 1;
 	}
 
+	ND_TCHECK_16BITS(&p[0]);
 	ND_PRINT((ndo,"("));
 	t = EXTRACT_16BITS(&p[0]) & 0x7fff;
 	if (map && t < nmap && map[t].type)
@@ -935,47 +939,71 @@ ikev1_attrmap_print(netdissect_options *ndo,
 		ND_PRINT((ndo,"type=#%d ", t));
 	if (p[0] & 0x80) {
 		ND_PRINT((ndo,"value="));
+		ND_TCHECK_16BITS(&p[2]);
 		v = EXTRACT_16BITS(&p[2]);
 		if (map && t < nmap && v < map[t].nvalue && map[t].value[v])
 			ND_PRINT((ndo,"%s", map[t].value[v]));
-		else
-			rawprint(ndo, (const uint8_t *)&p[2], 2);
+		else {
+			if (!rawprint(ndo, (const uint8_t *)&p[2], 2)) {
+				ND_PRINT((ndo,")"));
+				goto trunc;
+			}
+		}
 	} else {
-		ND_PRINT((ndo,"len=%d value=", EXTRACT_16BITS(&p[2])));
-		rawprint(ndo, (const uint8_t *)&p[4], EXTRACT_16BITS(&p[2]));
+		ND_PRINT((ndo,"len=%d value=", totlen - 4));
+		if (!rawprint(ndo, (const uint8_t *)&p[4], totlen - 4)) {
+			ND_PRINT((ndo,")"));
+			goto trunc;
+		}
 	}
 	ND_PRINT((ndo,")"));
 	return p + totlen;
+
+trunc:
+	return NULL;
 }
 
 static const u_char *
-ikev1_attr_print(netdissect_options *ndo, const u_char *p, const u_char *ep)
+ikev1_attr_print(netdissect_options *ndo, const u_char *p, const u_char *ep2)
 {
 	int totlen;
 	uint32_t t;
 
+	ND_TCHECK(p[0]);
 	if (p[0] & 0x80)
 		totlen = 4;
-	else
+	else {
+		ND_TCHECK_16BITS(&p[2]);
 		totlen = 4 + EXTRACT_16BITS(&p[2]);
-	if (ep < p + totlen) {
+	}
+	if (ep2 < p + totlen) {
 		ND_PRINT((ndo,"[|attr]"));
-		return ep + 1;
+		return ep2 + 1;
 	}
 
+	ND_TCHECK_16BITS(&p[0]);
 	ND_PRINT((ndo,"("));
 	t = EXTRACT_16BITS(&p[0]) & 0x7fff;
 	ND_PRINT((ndo,"type=#%d ", t));
 	if (p[0] & 0x80) {
 		ND_PRINT((ndo,"value="));
 		t = p[2];
-		rawprint(ndo, (const uint8_t *)&p[2], 2);
+		if (!rawprint(ndo, (const uint8_t *)&p[2], 2)) {
+			ND_PRINT((ndo,")"));
+			goto trunc;
+		}
 	} else {
-		ND_PRINT((ndo,"len=%d value=", EXTRACT_16BITS(&p[2])));
-		rawprint(ndo, (const uint8_t *)&p[4], EXTRACT_16BITS(&p[2]));
+		ND_PRINT((ndo,"len=%d value=", totlen - 4));
+		if (!rawprint(ndo, (const uint8_t *)&p[4], totlen - 4)) {
+			ND_PRINT((ndo,")"));
+			goto trunc;
+		}
 	}
 	ND_PRINT((ndo,")"));
 	return p + totlen;
+
+trunc:
+	return NULL;
 }
 
 static const u_char *
@@ -1256,11 +1284,12 @@ ikev1_t_print(netdissect_options *ndo, u_char tpay _U_,
 	cp = (const u_char *)(p + 1);
 	ep2 = (const u_char *)p + item_len;
 	while (cp < ep && cp < ep2) {
-		if (map && nmap) {
-			cp = ikev1_attrmap_print(ndo, cp, (ep < ep2) ? ep : ep2,
-				map, nmap);
-		} else
-			cp = ikev1_attr_print(ndo, cp, (ep < ep2) ? ep : ep2);
+		if (map && nmap)
+			cp = ikev1_attrmap_print(ndo, cp, ep2, map, nmap);
+		else
+			cp = ikev1_attr_print(ndo, cp, ep2);
+		if (cp == NULL)
+			goto trunc;
 	}
 	if (ep < ep2)
 		ND_PRINT((ndo,"..."));
@@ -1284,6 +1313,7 @@ ikev1_ke_print(netdissect_options *ndo, u_char tpay _U_,
 	UNALIGNED_MEMCPY(&e, ext, sizeof(e));
 	ND_PRINT((ndo," key len=%d", ntohs(e.len) - 4));
 	if (2 < ndo->ndo_vflag && 4 < ntohs(e.len)) {
+		/* Print the entire payload in hex */
 		ND_PRINT((ndo," "));
 		if (!rawprint(ndo, (const uint8_t *)(ext + 1), ntohs(e.len) - 4))
 			goto trunc;
@@ -1406,8 +1436,8 @@ ikev1_id_print(netdissect_options *ndo, u_char tpay _U_,
 		case IPSECDOI_ID_IPV6_ADDR_SUBNET:
 		    {
 			const u_char *mask;
-			if (len < 20)
-				ND_PRINT((ndo," len=%d [bad: < 20]", len));
+			if (len < 32)
+				ND_PRINT((ndo," len=%d [bad: < 32]", len));
 			else {
 				mask = (const u_char *)(data + sizeof(struct in6_addr));
 				/*XXX*/
@@ -1486,6 +1516,7 @@ ikev1_cert_print(netdissect_options *ndo, u_char tpay _U_,
 	ND_PRINT((ndo," len=%d", item_len - 4));
 	ND_PRINT((ndo," type=%s", STR_OR_ID((cert.encode), certstr)));
 	if (2 < ndo->ndo_vflag && 4 < item_len) {
+		/* Print the entire payload in hex */
 		ND_PRINT((ndo," "));
 		if (!rawprint(ndo, (const uint8_t *)(ext + 1), item_len - 4))
 			goto trunc;
@@ -1518,6 +1549,7 @@ ikev1_cr_print(netdissect_options *ndo, u_char tpay _U_,
 	ND_PRINT((ndo," len=%d", item_len - 4));
 	ND_PRINT((ndo," type=%s", STR_OR_ID((cert.encode), certstr)));
 	if (2 < ndo->ndo_vflag && 4 < item_len) {
+		/* Print the entire payload in hex */
 		ND_PRINT((ndo," "));
 		if (!rawprint(ndo, (const uint8_t *)(ext + 1), item_len - 4))
 			goto trunc;
@@ -1542,6 +1574,7 @@ ikev1_hash_print(netdissect_options *ndo, u_char tpay _U_,
 	UNALIGNED_MEMCPY(&e, ext, sizeof(e));
 	ND_PRINT((ndo," len=%d", ntohs(e.len) - 4));
 	if (2 < ndo->ndo_vflag && 4 < ntohs(e.len)) {
+		/* Print the entire payload in hex */
 		ND_PRINT((ndo," "));
 		if (!rawprint(ndo, (const uint8_t *)(ext + 1), ntohs(e.len) - 4))
 			goto trunc;
@@ -1566,6 +1599,7 @@ ikev1_sig_print(netdissect_options *ndo, u_char tpay _U_,
 	UNALIGNED_MEMCPY(&e, ext, sizeof(e));
 	ND_PRINT((ndo," len=%d", ntohs(e.len) - 4));
 	if (2 < ndo->ndo_vflag && 4 < ntohs(e.len)) {
+		/* Print the entire payload in hex */
 		ND_PRINT((ndo," "));
 		if (!rawprint(ndo, (const uint8_t *)(ext + 1), ntohs(e.len) - 4))
 			goto trunc;
@@ -1724,14 +1758,18 @@ ikev1_n_print(netdissect_options *ndo, u_char tpay _U_,
 			size_t nmap = sizeof(oakley_t_map)/sizeof(oakley_t_map[0]);
 			ND_PRINT((ndo," attrs=("));
 			while (cp < ep && cp < ep2) {
-				cp = ikev1_attrmap_print(ndo, cp,
-					(ep < ep2) ? ep : ep2, map, nmap);
+				cp = ikev1_attrmap_print(ndo, cp, ep2, map, nmap);
+				if (cp == NULL) {
+					ND_PRINT((ndo,")"));
+					goto trunc;
+				}
 			}
 			ND_PRINT((ndo,")"));
 			break;
 		    }
 		case IPSECDOI_NTYPE_REPLAY_STATUS:
 			ND_PRINT((ndo," status=("));
+			ND_TCHECK_32BITS(cp);
 			ND_PRINT((ndo,"replay detection %sabled",
 				  EXTRACT_32BITS(cp) ? "en" : "dis"));
 			ND_PRINT((ndo,")"));
@@ -1818,6 +1856,7 @@ ikev1_vid_print(netdissect_options *ndo, u_char tpay _U_,
 	UNALIGNED_MEMCPY(&e, ext, sizeof(e));
 	ND_PRINT((ndo," len=%d", ntohs(e.len) - 4));
 	if (2 < ndo->ndo_vflag && 4 < ntohs(e.len)) {
+		/* Print the entire payload in hex */
 		ND_PRINT((ndo," "));
 		if (!rawprint(ndo, (const uint8_t *)(ext + 1), ntohs(e.len) - 4))
 			goto trunc;
@@ -1852,6 +1891,7 @@ ikev2_gen_print(netdissect_options *ndo, u_char tpay,
 
 	ND_PRINT((ndo," len=%d", ntohs(e.len) - 4));
 	if (2 < ndo->ndo_vflag && 4 < ntohs(e.len)) {
+		/* Print the entire payload in hex */
 		ND_PRINT((ndo," "));
 		if (!rawprint(ndo, (const uint8_t *)(ext + 1), ntohs(e.len) - 4))
 			goto trunc;
@@ -1926,10 +1966,11 @@ ikev2_t_print(netdissect_options *ndo, int tcount,
 	ep2 = (const u_char *)p + item_len;
 	while (cp < ep && cp < ep2) {
 		if (map && nmap) {
-			cp = ikev1_attrmap_print(ndo, cp, (ep < ep2) ? ep : ep2,
-				map, nmap);
+			cp = ikev1_attrmap_print(ndo, cp, ep2, map, nmap);
 		} else
-			cp = ikev1_attr_print(ndo, cp, (ep < ep2) ? ep : ep2);
+			cp = ikev1_attr_print(ndo, cp, ep2);
+		if (cp == NULL)
+			goto trunc;
 	}
 	if (ep < ep2)
 		ND_PRINT((ndo,"..."));
@@ -1989,7 +2030,6 @@ ikev2_p_print(netdissect_options *ndo, u_char tpay _U_, int pcount _U_,
 		if (prop_length < sizeof(*ext))
 			goto toolong;
 		ND_TCHECK(*ext);
-
 		UNALIGNED_MEMCPY(&e, ext, sizeof(e));
 
 		/*
@@ -2076,7 +2116,6 @@ ikev2_sa_print(netdissect_options *ndo, u_char tpay,
 		if (sa_length < sizeof(*ext))
 			goto toolong;
 		ND_TCHECK(*ext);
-
 		UNALIGNED_MEMCPY(&e, ext, sizeof(e));
 
 		/*
@@ -2137,7 +2176,7 @@ ikev2_ke_print(netdissect_options *ndo, u_char tpay,
 	const struct ikev2_ke *k;
 
 	k = (const struct ikev2_ke *)ext;
-	ND_TCHECK(*ext);
+	ND_TCHECK(*k);
 	UNALIGNED_MEMCPY(&ke, ext, sizeof(ke));
 	ikev2_pay_print(ndo, NPSTR(tpay), ke.h.critical);
 
@@ -2162,12 +2201,14 @@ ikev2_ID_print(netdissect_options *ndo, u_char tpay,
 		uint32_t phase _U_, uint32_t doi _U_,
 		uint32_t proto _U_, int depth _U_)
 {
+	const struct ikev2_id *idp;
 	struct ikev2_id id;
 	int id_len, idtype_len, i;
 	unsigned int dumpascii, dumphex;
 	const unsigned char *typedata;
 
-	ND_TCHECK(*ext);
+	idp = (const struct ikev2_id *)ext;
+	ND_TCHECK(*idp);
 	UNALIGNED_MEMCPY(&id, ext, sizeof(id));
 	ikev2_pay_print(ndo, NPSTR(tpay), id.h.critical);
 
@@ -2175,6 +2216,7 @@ ikev2_ID_print(netdissect_options *ndo, u_char tpay,
 
 	ND_PRINT((ndo," len=%d", id_len - 4));
 	if (2 < ndo->ndo_vflag && 4 < id_len) {
+		/* Print the entire payload in hex */
 		ND_PRINT((ndo," "));
 		if (!rawprint(ndo, (const uint8_t *)(ext + 1), id_len - 4))
 			goto trunc;
@@ -2270,7 +2312,7 @@ ikev2_auth_print(netdissect_options *ndo, u_char tpay,
 	const u_char *authdata = (const u_char*)ext + sizeof(a);
 	unsigned int len;
 
-	ND_TCHECK(*ext);
+	ND_TCHECK2(*ext, sizeof(a));
 	UNALIGNED_MEMCPY(&a, ext, sizeof(a));
 	ikev2_pay_print(ndo, NPSTR(tpay), a.h.critical);
 	len = ntohs(a.h.len);
@@ -2566,6 +2608,7 @@ ikev2_vid_print(netdissect_options *ndo, u_char tpay,
 		else ND_PRINT((ndo, "."));
 	}
 	if (2 < ndo->ndo_vflag && 4 < len) {
+		/* Print the entire payload in hex */
 		ND_PRINT((ndo," "));
 		if (!rawprint(ndo, (const uint8_t *)(ext + 1), ntohs(e.len) - 4))
 			goto trunc;
@@ -2731,7 +2774,6 @@ ikev1_sub_print(netdissect_options *ndo,
 
 	while (np) {
 		ND_TCHECK(*ext);
-
 		UNALIGNED_MEMCPY(&e, ext, sizeof(e));
 
 		ND_TCHECK2(*ext, ntohs(e.len));
@@ -2899,7 +2941,6 @@ ikev2_sub_print(netdissect_options *ndo,
 	cp = (const u_char *)ext;
 	while (np) {
 		ND_TCHECK(*ext);
-
 		UNALIGNED_MEMCPY(&e, ext, sizeof(e));
 
 		ND_TCHECK2(*ext, ntohs(e.len));