Adding upstream version 4.99.4.upstream/4.99.4

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 341 insertions, 0 deletions

diff --git a/print-eap.c b/print-eap.c
new file mode 100644
index 0000000..78439b7
--- /dev/null
+++ b/print-eap.c
@@ -0,0 +1,341 @@
+/*
+ * Copyright (c) 2004 - Michael Richardson <mcr@xelerance.com>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that: (1) source code distributions
+ * retain the above copyright notice and this paragraph in its entirety, (2)
+ * distributions including binary code include the above copyright notice and
+ * this paragraph in its entirety in the documentation or other materials
+ * provided with the distribution, and (3) all advertising materials mentioning
+ * features or use of this software display the following acknowledgement:
+ * ``This product includes software developed by the University of California,
+ * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
+ * the University nor the names of its contributors may be used to endorse
+ * or promote products derived from this software without specific prior
+ * written permission.
+ * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
+ */
+
+/* \summary: Extensible Authentication Protocol (EAP) printer */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include "netdissect-stdinc.h"
+
+#include "netdissect.h"
+#include "extract.h"
+
+#define	EAP_FRAME_TYPE_PACKET		0
+#define	EAP_FRAME_TYPE_START		1
+#define	EAP_FRAME_TYPE_LOGOFF		2
+#define	EAP_FRAME_TYPE_KEY		3
+#define	EAP_FRAME_TYPE_ENCAP_ASF_ALERT	4
+
+struct eap_frame_t {
+    nd_uint8_t  version;
+    nd_uint8_t  type;
+    nd_uint16_t length;
+};
+
+static const struct tok eap_frame_type_values[] = {
+    { EAP_FRAME_TYPE_PACKET,		"EAP packet" },
+    { EAP_FRAME_TYPE_START,		"EAPOL start" },
+    { EAP_FRAME_TYPE_LOGOFF,		"EAPOL logoff" },
+    { EAP_FRAME_TYPE_KEY,		"EAPOL key" },
+    { EAP_FRAME_TYPE_ENCAP_ASF_ALERT,	"Encapsulated ASF alert" },
+    { 0, NULL}
+};
+
+/* RFC 3748 */
+struct eap_packet_t {
+    nd_uint8_t  code;
+    nd_uint8_t  id;
+    nd_uint16_t length;
+};
+
+#define		EAP_REQUEST	1
+#define		EAP_RESPONSE	2
+#define		EAP_SUCCESS	3
+#define		EAP_FAILURE	4
+
+static const struct tok eap_code_values[] = {
+    { EAP_REQUEST,	"Request" },
+    { EAP_RESPONSE,	"Response" },
+    { EAP_SUCCESS,	"Success" },
+    { EAP_FAILURE,	"Failure" },
+    { 0, NULL}
+};
+
+#define		EAP_TYPE_NO_PROPOSED	0
+#define		EAP_TYPE_IDENTITY	1
+#define		EAP_TYPE_NOTIFICATION	2
+#define		EAP_TYPE_NAK		3
+#define		EAP_TYPE_MD5_CHALLENGE	4
+#define		EAP_TYPE_OTP		5
+#define		EAP_TYPE_GTC		6
+#define		EAP_TYPE_TLS		13		/* RFC 5216 */
+#define		EAP_TYPE_SIM		18		/* RFC 4186 */
+#define		EAP_TYPE_TTLS		21		/* RFC 5281, draft-funk-eap-ttls-v0-01.txt */
+#define		EAP_TYPE_AKA		23		/* RFC 4187 */
+#define		EAP_TYPE_FAST		43		/* RFC 4851 */
+#define		EAP_TYPE_EXPANDED_TYPES	254
+#define		EAP_TYPE_EXPERIMENTAL	255
+
+static const struct tok eap_type_values[] = {
+    { EAP_TYPE_NO_PROPOSED,	"No proposed" },
+    { EAP_TYPE_IDENTITY,	"Identity" },
+    { EAP_TYPE_NOTIFICATION,    "Notification" },
+    { EAP_TYPE_NAK,		"Nak" },
+    { EAP_TYPE_MD5_CHALLENGE,   "MD5-challenge" },
+    { EAP_TYPE_OTP,		"OTP" },
+    { EAP_TYPE_GTC,		"GTC" },
+    { EAP_TYPE_TLS,		"TLS" },
+    { EAP_TYPE_SIM,		"SIM" },
+    { EAP_TYPE_TTLS,		"TTLS" },
+    { EAP_TYPE_AKA,		"AKA" },
+    { EAP_TYPE_FAST,		"FAST" },
+    { EAP_TYPE_EXPANDED_TYPES,  "Expanded types" },
+    { EAP_TYPE_EXPERIMENTAL,    "Experimental" },
+    { 0, NULL}
+};
+
+#define EAP_TLS_EXTRACT_BIT_L(x)	(((x)&0x80)>>7)
+
+/* RFC 5216 - EAP TLS bits */
+#define EAP_TLS_FLAGS_LEN_INCLUDED		(1 << 7)
+#define EAP_TLS_FLAGS_MORE_FRAGMENTS		(1 << 6)
+#define EAP_TLS_FLAGS_START			(1 << 5)
+
+static const struct tok eap_tls_flags_values[] = {
+	{ EAP_TLS_FLAGS_LEN_INCLUDED, "L bit" },
+	{ EAP_TLS_FLAGS_MORE_FRAGMENTS, "More fragments bit"},
+	{ EAP_TLS_FLAGS_START, "Start bit"},
+	{ 0, NULL}
+};
+
+#define EAP_TTLS_VERSION(x)		((x)&0x07)
+
+/* EAP-AKA and EAP-SIM - RFC 4187 */
+#define EAP_AKA_CHALLENGE		1
+#define EAP_AKA_AUTH_REJECT		2
+#define EAP_AKA_SYNC_FAILURE		4
+#define EAP_AKA_IDENTITY		5
+#define EAP_SIM_START			10
+#define EAP_SIM_CHALLENGE		11
+#define EAP_AKA_NOTIFICATION		12
+#define EAP_AKA_REAUTH			13
+#define EAP_AKA_CLIENT_ERROR		14
+
+static const struct tok eap_aka_subtype_values[] = {
+    { EAP_AKA_CHALLENGE,	"Challenge" },
+    { EAP_AKA_AUTH_REJECT,	"Auth reject" },
+    { EAP_AKA_SYNC_FAILURE,	"Sync failure" },
+    { EAP_AKA_IDENTITY,		"Identity" },
+    { EAP_SIM_START,		"Start" },
+    { EAP_SIM_CHALLENGE,	"Challenge" },
+    { EAP_AKA_NOTIFICATION,	"Notification" },
+    { EAP_AKA_REAUTH,		"Reauth" },
+    { EAP_AKA_CLIENT_ERROR,	"Client error" },
+    { 0, NULL}
+};
+
+/*
+ * Print EAP requests / responses
+ */
+void
+eap_print(netdissect_options *ndo,
+          const u_char *cp,
+          u_int length)
+{
+    u_int type, subtype, len;
+    u_int count;
+    const char *sep;
+
+    type = GET_U_1(cp);
+    len = GET_BE_U_2(cp + 2);
+    if (len != length) {
+        /*
+         * Probably a fragment; in some cases the fragmentation might
+         * not put an EAP header on every packet, if reassembly can
+         * be done without that (e.g., fragmentation to make a message
+         * fit in multiple TLVs in a RADIUS packet).
+         */
+        ND_PRINT("EAP fragment?");
+        return;
+    }
+    ND_PRINT("%s (%u), id %u, len %u",
+            tok2str(eap_code_values, "unknown", type),
+            type,
+            GET_U_1((cp + 1)),
+            len);
+    if (len < 4) {
+        ND_PRINT(" (too short for EAP header)");
+        return;
+    }
+
+    ND_TCHECK_LEN(cp, len);
+
+    if (type == EAP_REQUEST || type == EAP_RESPONSE) {
+        /* RFC 3748 Section 4.1 */
+        if (len < 5) {
+            ND_PRINT(" (too short for EAP request/response)");
+            return;
+        }
+        subtype = GET_U_1(cp + 4);
+        ND_PRINT("\n\t\t Type %s (%u)",
+                tok2str(eap_type_values, "unknown", subtype),
+                subtype);
+
+        switch (subtype) {
+            case EAP_TYPE_IDENTITY:
+                /* According to RFC 3748, the message is optional */
+                if (len > 5) {
+                    ND_PRINT(", Identity: ");
+                    nd_printjnp(ndo, cp + 5, len - 5);
+                }
+                break;
+
+            case EAP_TYPE_NOTIFICATION:
+                /* According to RFC 3748, there must be at least one octet of message */
+                if (len < 6) {
+                    ND_PRINT(" (too short for EAP Notification request/response)");
+                    return;
+                }
+                ND_PRINT(", Notification: ");
+                nd_printjnp(ndo, cp + 5, len - 5);
+                break;
+
+            case EAP_TYPE_NAK:
+                /*
+                 * one or more octets indicating
+                 * the desired authentication
+                 * type one octet per type
+                 */
+                if (len < 6) {
+                    ND_PRINT(" (too short for EAP Legacy NAK request/response)");
+                    return;
+                }
+                sep = "";
+                for (count = 5; count < len; count++) {
+                    ND_PRINT("%s %s (%u)", sep,
+                           tok2str(eap_type_values, "unknown", GET_U_1((cp + count))),
+                           GET_U_1(cp + count));
+                    sep = ",";
+                }
+                break;
+
+            case EAP_TYPE_TTLS:
+            case EAP_TYPE_TLS:
+                if (len < 6) {
+                    ND_PRINT(" (too short for EAP TLS/TTLS request/response)");
+                    return;
+                }
+                if (subtype == EAP_TYPE_TTLS)
+                    ND_PRINT(" TTLSv%u",
+                           EAP_TTLS_VERSION(GET_U_1((cp + 5))));
+                ND_PRINT(" flags [%s] 0x%02x",
+                       bittok2str(eap_tls_flags_values, "none", GET_U_1((cp + 5))),
+                       GET_U_1(cp + 5));
+
+                if (EAP_TLS_EXTRACT_BIT_L(GET_U_1(cp + 5))) {
+                    if (len < 10) {
+                        ND_PRINT(" (too short for EAP TLS/TTLS request/response with length)");
+                        return;
+                    }
+                    ND_PRINT(", len %u", GET_BE_U_4(cp + 6));
+                }
+                break;
+
+            case EAP_TYPE_FAST:
+                if (len < 6) {
+                    ND_PRINT(" (too short for EAP FAST request/response)");
+                    return;
+                }
+                ND_PRINT(" FASTv%u",
+                       EAP_TTLS_VERSION(GET_U_1((cp + 5))));
+                ND_PRINT(" flags [%s] 0x%02x",
+                       bittok2str(eap_tls_flags_values, "none", GET_U_1((cp + 5))),
+                       GET_U_1(cp + 5));
+
+                if (EAP_TLS_EXTRACT_BIT_L(GET_U_1(cp + 5))) {
+                    if (len < 10) {
+                        ND_PRINT(" (too short for EAP FAST request/response with length)");
+                        return;
+                    }
+                    ND_PRINT(", len %u", GET_BE_U_4(cp + 6));
+                }
+
+                /* FIXME - TLV attributes follow */
+                break;
+
+            case EAP_TYPE_AKA:
+            case EAP_TYPE_SIM:
+                if (len < 6) {
+                    ND_PRINT(" (too short for EAP SIM/AKA request/response)");
+                    return;
+                }
+                ND_PRINT(" subtype [%s] 0x%02x",
+                       tok2str(eap_aka_subtype_values, "unknown", GET_U_1((cp + 5))),
+                       GET_U_1(cp + 5));
+
+                /* FIXME - TLV attributes follow */
+                break;
+
+            case EAP_TYPE_MD5_CHALLENGE:
+            case EAP_TYPE_OTP:
+            case EAP_TYPE_GTC:
+            case EAP_TYPE_EXPANDED_TYPES:
+            case EAP_TYPE_EXPERIMENTAL:
+            default:
+                break;
+        }
+    }
+    return;
+trunc:
+    nd_print_trunc(ndo);
+}
+
+void
+eapol_print(netdissect_options *ndo,
+            const u_char *cp)
+{
+    const struct eap_frame_t *eap;
+    u_int eap_type, eap_len;
+
+    ndo->ndo_protocol = "eap";
+    eap = (const struct eap_frame_t *)cp;
+    ND_TCHECK_SIZE(eap);
+    eap_type = GET_U_1(eap->type);
+
+    ND_PRINT("%s (%u) v%u, len %u",
+           tok2str(eap_frame_type_values, "unknown", eap_type),
+           eap_type,
+           GET_U_1(eap->version),
+           GET_BE_U_2(eap->length));
+    if (ndo->ndo_vflag < 1)
+        return;
+
+    cp += sizeof(struct eap_frame_t);
+    eap_len = GET_BE_U_2(eap->length);
+
+    switch (eap_type) {
+    case EAP_FRAME_TYPE_PACKET:
+        if (eap_len == 0)
+            goto trunc;
+        ND_PRINT(", ");
+        eap_print(ndo, cp, eap_len);
+        return;
+    case EAP_FRAME_TYPE_LOGOFF:
+    case EAP_FRAME_TYPE_ENCAP_ASF_ALERT:
+    default:
+        break;
+    }
+    return;
+
+ trunc:
+    nd_print_trunc(ndo);
+}