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+/* packet-tacacs.h
+ * Routines for cisco tacplus packet dissection
+ * Copyright 2000, Emanuele Caratti <wiz@iol.it>
+ *
+ * $Id$
+ *
+ * Ethereal - Network traffic analyzer
+ * By Gerald Combs <gerald@ethereal.com>
+ * Copyright 1998 Gerald Combs
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ */
+
+#ifndef __PACKET_TACACS_H__
+#define __PACKET_TACACS_H__
+
+#define TAC_PLUS_HDR_SIZE 12
+
+#define MD5_LEN 16
+#define MSCHAP_DIGEST_LEN 49
+enum
+{
+ FLAGS_UNENCRYPTED = 0x01,
+ FLAGS_SINGLE = 0x04
+};
+
+/* Tacacs+ packet type */
+enum
+{
+ TAC_PLUS_AUTHEN = 0x01, /* Authentication */
+ TAC_PLUS_AUTHOR = 0x02, /* Authorization */
+ TAC_PLUS_ACCT = 0x03 /* Accounting */
+};
+
+/* Flags */
+#define TAC_PLUS_ENCRYPTED 0x0
+#define TAC_PLUS_CLEAR 0x1
+
+/* Authentication action to perform */
+enum
+{
+ TAC_PLUS_AUTHEN_LOGIN = 0x01,
+ TAC_PLUS_AUTHEN_CHPASS = 0x02,
+ TAC_PLUS_AUTHEN_SENDPASS = 0x03, /* deprecated */
+ TAC_PLUS_AUTHEN_SENDAUTH = 0x04
+};
+
+/* Authentication priv_levels */
+enum
+{
+ TAC_PLUS_PRIV_LVL_MAX = 0x0f,
+ TAC_PLUS_PRIV_LVL_ROOT = 0x0f,
+ TAC_PLUS_PRIV_LVL_USER = 0x01,
+ TAC_PLUS_PRIV_LVL_MIN = 0x00
+};
+
+/* authen types */
+enum
+{
+ TAC_PLUS_AUTHEN_TYPE_ASCII = 0x01, /* ascii */
+ TAC_PLUS_AUTHEN_TYPE_PAP = 0x02, /* pap */
+ TAC_PLUS_AUTHEN_TYPE_CHAP = 0x03, /* chap */
+ TAC_PLUS_AUTHEN_TYPE_ARAP = 0x04, /* arap */
+ TAC_PLUS_AUTHEN_TYPE_MSCHAP = 0x05 /* mschap */
+};
+
+/* authen services */
+enum
+{
+ TAC_PLUS_AUTHEN_SVC_NONE = 0x00,
+ TAC_PLUS_AUTHEN_SVC_LOGIN = 0x01,
+ TAC_PLUS_AUTHEN_SVC_ENABLE = 0x02,
+ TAC_PLUS_AUTHEN_SVC_PPP = 0x03,
+ TAC_PLUS_AUTHEN_SVC_ARAP = 0x04,
+ TAC_PLUS_AUTHEN_SVC_PT = 0x05,
+ TAC_PLUS_AUTHEN_SVC_RCMD = 0x06,
+ TAC_PLUS_AUTHEN_SVC_X25 = 0x07,
+ TAC_PLUS_AUTHEN_SVC_NASI = 0x08,
+ TAC_PLUS_AUTHEN_SVC_FWPROXY = 0x09
+};
+
+/* status of reply packet, that client get from server in authen */
+enum
+{
+ TAC_PLUS_AUTHEN_STATUS_PASS = 0x01,
+ TAC_PLUS_AUTHEN_STATUS_FAIL = 0x02,
+ TAC_PLUS_AUTHEN_STATUS_GETDATA = 0x03,
+ TAC_PLUS_AUTHEN_STATUS_GETUSER = 0x04,
+ TAC_PLUS_AUTHEN_STATUS_GETPASS = 0x05,
+ TAC_PLUS_AUTHEN_STATUS_RESTART = 0x06,
+ TAC_PLUS_AUTHEN_STATUS_ERROR = 0x07,
+ TAC_PLUS_AUTHEN_STATUS_FOLLOW = 0x21
+};
+
+/* Authen reply Flags */
+#define TAC_PLUS_REPLY_FLAG_NOECHO 0x01
+/* Authen continue Flags */
+#define TAC_PLUS_CONTINUE_FLAG_ABORT 0x01
+
+/* methods of authentication */
+enum {
+ TAC_PLUS_AUTHEN_METH_NOT_SET = 0x00,
+ TAC_PLUS_AUTHEN_METH_NONE = 0x01,
+ TAC_PLUS_AUTHEN_METH_KRB5 = 0x03,
+ TAC_PLUS_AUTHEN_METH_LINE = 0x03,
+ TAC_PLUS_AUTHEN_METH_ENABLE = 0x04,
+ TAC_PLUS_AUTHEN_METH_LOCAL = 0x05,
+ TAC_PLUS_AUTHEN_METH_TACACSPLUS = 0x06,
+ TAC_PLUS_AUTHEN_METH_GUEST = 0x08,
+ TAC_PLUS_AUTHEN_METH_RADIUS = 0x10,
+ TAC_PLUS_AUTHEN_METH_KRB4 = 0x11,
+ TAC_PLUS_AUTHEN_METH_RCMD = 0x20
+};
+
+/* authorization status */
+enum
+{
+ TAC_PLUS_AUTHOR_STATUS_PASS_ADD = 0x01,
+ TAC_PLUS_AUTHOR_STATUS_PASS_REPL = 0x02,
+ TAC_PLUS_AUTHOR_STATUS_FAIL = 0x10,
+ TAC_PLUS_AUTHOR_STATUS_ERROR = 0x11,
+ TAC_PLUS_AUTHOR_STATUS_FOLLOW = 0x21
+};
+
+/* accounting flag */
+
+enum
+{
+ TAC_PLUS_ACCT_FLAG_MORE = 0x1, /* deprecated */
+ TAC_PLUS_ACCT_FLAG_START = 0x2,
+ TAC_PLUS_ACCT_FLAG_STOP = 0x4,
+ TAC_PLUS_ACCT_FLAG_WATCHDOG = 0x8
+};
+/* accounting status */
+enum {
+ TAC_PLUS_ACCT_STATUS_SUCCESS = 0x01,
+ TAC_PLUS_ACCT_STATUS_ERROR = 0x02,
+ TAC_PLUS_ACCT_STATUS_FOLLOW = 0x21
+};
+
+/* Header offsets */
+#define H_VER_OFF (0)
+#define H_TYPE_OFF (H_VER_OFF+1)
+#define H_SEQ_NO_OFF (H_TYPE_OFF+1)
+#define H_FLAGS_OFF (H_SEQ_NO_OFF+1)
+#define H_SESSION_ID_OFF (H_FLAGS_OFF+1)
+#define H_LENGTH_OFF (H_SESSION_ID_OFF+4)
+
+#define TACPLUS_BODY_OFF 0
+/* authen START offsets */
+#define AUTHEN_S_ACTION_OFF (TACPLUS_BODY_OFF)
+#define AUTHEN_S_PRIV_LVL_OFF (AUTHEN_S_ACTION_OFF+1)
+#define AUTHEN_S_AUTHEN_TYPE_OFF (AUTHEN_S_PRIV_LVL_OFF+1)
+#define AUTHEN_S_SERVICE_OFF (AUTHEN_S_AUTHEN_TYPE_OFF+1)
+#define AUTHEN_S_USER_LEN_OFF (AUTHEN_S_SERVICE_OFF+1)
+#define AUTHEN_S_PORT_LEN_OFF (AUTHEN_S_USER_LEN_OFF+1)
+#define AUTHEN_S_REM_ADDR_LEN_OFF (AUTHEN_S_PORT_LEN_OFF+1)
+#define AUTHEN_S_DATA_LEN_OFF (AUTHEN_S_REM_ADDR_LEN_OFF+1)
+#define AUTHEN_S_VARDATA_OFF (AUTHEN_S_DATA_LEN_OFF+1) /* variable data offset (user, port, etc ) */
+
+/* authen REPLY fields offset */
+#define AUTHEN_R_STATUS_OFF (TACPLUS_BODY_OFF)
+#define AUTHEN_R_FLAGS_OFF (AUTHEN_R_STATUS_OFF+1)
+#define AUTHEN_R_SRV_MSG_LEN_OFF (AUTHEN_R_FLAGS_OFF+1)
+#define AUTHEN_R_DATA_LEN_OFF (AUTHEN_R_SRV_MSG_LEN_OFF+2)
+#define AUTHEN_R_VARDATA_OFF (AUTHEN_R_DATA_LEN_OFF+2)
+
+/* authen CONTINUE fields offset */
+#define AUTHEN_C_USER_LEN_OFF (TACPLUS_BODY_OFF)
+#define AUTHEN_C_DATA_LEN_OFF (AUTHEN_C_USER_LEN_OFF+2)
+#define AUTHEN_C_FLAGS_OFF (AUTHEN_C_DATA_LEN_OFF+2)
+#define AUTHEN_C_VARDATA_OFF (AUTHEN_C_FLAGS_OFF+1)
+
+/* acct REQUEST fields offsets */
+#define ACCT_Q_FLAGS_OFF (TACPLUS_BODY_OFF)
+#define ACCT_Q_METHOD_OFF (ACCT_Q_FLAGS_OFF+1)
+#define ACCT_Q_PRIV_LVL_OFF (ACCT_Q_METHOD_OFF+1)
+#define ACCT_Q_AUTHEN_TYPE_OFF (ACCT_Q_PRIV_LVL_OFF+1)
+#define ACCT_Q_SERVICE_OFF (ACCT_Q_AUTHEN_TYPE_OFF+1)
+#define ACCT_Q_USER_LEN_OFF (ACCT_Q_SERVICE_OFF+1)
+#define ACCT_Q_PORT_LEN_OFF (ACCT_Q_USER_LEN_OFF+1)
+#define ACCT_Q_REM_ADDR_LEN_OFF (ACCT_Q_PORT_LEN_OFF+1)
+#define ACCT_Q_ARG_CNT_OFF (ACCT_Q_REM_ADDR_LEN_OFF+1)
+#define ACCT_Q_VARDATA_OFF (ACCT_Q_ARG_CNT_OFF+1)
+
+/* acct REPLY fields offsets */
+#define ACCT_R_SRV_MSG_LEN_OFF (TACPLUS_BODY_OFF)
+#define ACCT_R_DATA_LEN_OFF (ACCT_R_SRV_MSG_LEN_OFF+2)
+#define ACCT_R_STATUS_OFF (ACCT_R_DATA_LEN_OFF+2)
+#define ACCT_R_VARDATA_OFF (ACCT_R_STATUS_OFF+1)
+
+/* AUTHORIZATION */
+/* Request */
+#define AUTHOR_Q_AUTH_METH_OFF (TACPLUS_BODY_OFF)
+#define AUTHOR_Q_PRIV_LVL_OFF (AUTHOR_Q_AUTH_METH_OFF+1)
+#define AUTHOR_Q_AUTHEN_TYPE_OFF (AUTHOR_Q_PRIV_LVL_OFF+1)
+#define AUTHOR_Q_SERVICE_OFF (AUTHOR_Q_AUTHEN_TYPE_OFF+1)
+#define AUTHOR_Q_USER_LEN_OFF (AUTHOR_Q_SERVICE_OFF+1)
+#define AUTHOR_Q_PORT_LEN_OFF (AUTHOR_Q_USER_LEN_OFF+1)
+#define AUTHOR_Q_REM_ADDR_LEN_OFF (AUTHOR_Q_PORT_LEN_OFF+1)
+#define AUTHOR_Q_ARGC_OFF (AUTHOR_Q_REM_ADDR_LEN_OFF+1)
+#define AUTHOR_Q_VARDATA_OFF (AUTHOR_Q_ARGC_OFF+1)
+
+/* Reply */
+#define AUTHOR_R_STATUS_OFF (TACPLUS_BODY_OFF)
+#define AUTHOR_R_ARGC_OFF (AUTHOR_R_STATUS_OFF+1)
+#define AUTHOR_R_SRV_MSG_LEN_OFF (AUTHOR_R_ARGC_OFF+1)
+#define AUTHOR_R_DATA_LEN_OFF (AUTHOR_R_SRV_MSG_LEN_OFF+2)
+#define AUTHOR_R_VARDATA_OFF (AUTHOR_R_DATA_LEN_OFF+2)
+
+
+#if 0
+/* Packet structures */
+typedef struct {
+ u_char version;
+ u_char type;
+ u_char seq_no;
+ u_char flags;
+ guint32 session_id;
+ guint32 length;
+} tacplus_pkt_hdr;
+
+/* Authentication START packet */
+typedef struct {
+ u_char action;
+ u_char priv_lvl;
+ u_char authen_type;
+ u_char service;
+ u_char user_len;
+ u_char port_len;
+ u_char rem_addr_len;
+ u_char data_len;
+ u_char vardata[1];
+} tacplus_authen_start ;
+
+/* Authentication CONTINUE packet */
+typedef struct {
+ guint16 user_len;
+ guint16 data_len;
+ u_char flags;
+ u_char vardata[1];
+} tacplus_authen_continue ;
+
+/* Authentication REPLY packet */
+typedef struct {
+ u_char status;
+ u_char flags;
+ guint16 srv_msg_len;
+ guint16 data_len;
+ u_char vardata[1];
+} tacplus_authen_reply;
+
+
+/* Authentication sub-PACKET */
+typedef union {
+ tacplus_authen_start s; /* start */
+ tacplus_authen_continue c; /* continue */
+ tacplus_authen_reply r; /* reply (from srv) */
+} tacplus_authen_pkt;
+
+/* AUTHORIZATION request */
+
+typedef struct {
+ u_char authen_method;
+ u_char priv_lvl;
+ u_char authen_type;
+ u_char authen_service;
+ u_char user_len;
+ u_char port_len;
+ u_char rem_addr_len;
+ u_char arg_cnt;
+ u_char vardata[1];
+} tacplus_author_request;
+
+typedef struct {
+ u_char status;
+ u_char arg_cnt;
+ guint16 srv_msg_len;
+ guint16 data_len;
+ u_char vardata[1];
+} tacplus_author_reply;
+
+typedef union {
+ tacplus_author_request q;
+ tacplus_author_reply r;
+} tacplus_author_pkt;
+
+/* ACCOUNTING request */
+typedef struct {
+ u_char flags;
+ u_char authen_method;
+ u_char priv_lvl;
+ u_char authen_type;
+ u_char authen_service;
+ u_char user_len;
+ u_char port_len;
+ u_char rem_addr_len;
+ u_char arg_cnt;
+ u_char vardata[1];
+} tacplus_account_request;
+
+typedef struct {
+ guint16 srv_msg_len;
+ guint16 data_len;
+ u_char status;
+ u_char vardata[1];
+} tacplus_account_reply;
+
+typedef union {
+ tacplus_account_request q; /* Request */
+ tacplus_account_reply r; /* Reply */
+} tacplus_account_pkt;
+
+/* TACACS+ Packet */
+typedef struct {
+ tacplus_pkt_hdr hdr;
+ union {
+ tacplus_authen_pkt authen;
+ tacplus_author_pkt author;
+ tacplus_account_pkt acct;
+ } body;
+} tacplus_pkt;
+
+#endif
+
+/* From my old tacacs dissector */
+static value_string tacplus_type_vals[] = {
+ {TAC_PLUS_AUTHEN, "Authentication"},
+ {TAC_PLUS_AUTHOR, "Authorization" },
+ {TAC_PLUS_ACCT, "Accounting" },
+ {0, NULL}};
+
+static value_string tacplus_authen_action_vals[] = {
+ {TAC_PLUS_AUTHEN_LOGIN, "Inbound Login"},
+ {TAC_PLUS_AUTHEN_CHPASS, "Change password request"},
+ {TAC_PLUS_AUTHEN_SENDPASS, "Send password request"},
+ {TAC_PLUS_AUTHEN_SENDAUTH, "Outbound Request (SENDAUTH)"},
+ {0, NULL}};
+
+#if 0
+static value_string tacplus_authen_priv_lvl_vals[] = {
+ {TAC_PLUS_PRIV_LVL_MAX, "LVL_MAX"},
+ {TAC_PLUS_PRIV_LVL_ROOT, "LVL_ROOT"},
+ {TAC_PLUS_PRIV_LVL_USER, "LVL_USER"},
+ {TAC_PLUS_PRIV_LVL_MIN, "LVL_MIN"},
+ {0, NULL}};
+#endif
+
+static value_string tacplus_authen_type_vals[] = {
+ {TAC_PLUS_AUTHEN_TYPE_ASCII, "ASCII"},
+ {TAC_PLUS_AUTHEN_TYPE_PAP, "PAP"},
+ {TAC_PLUS_AUTHEN_TYPE_CHAP, "CHAP"},
+ {TAC_PLUS_AUTHEN_TYPE_ARAP, "ARAP"},
+ {TAC_PLUS_AUTHEN_TYPE_MSCHAP, "MS-CHAP"},
+ {0, NULL}};
+
+static value_string tacplus_authen_service_vals[] = {
+ {TAC_PLUS_AUTHEN_SVC_NONE, "TAC_PLUS_AUTHEN_SVC_NONE"},
+ {TAC_PLUS_AUTHEN_SVC_LOGIN, "Login" },
+ {TAC_PLUS_AUTHEN_SVC_ENABLE, "ENABLE"},
+ {TAC_PLUS_AUTHEN_SVC_PPP, "PPP" },
+ {TAC_PLUS_AUTHEN_SVC_ARAP, "ARAP" },
+ {TAC_PLUS_AUTHEN_SVC_PT, "TAC_PLUS_AUTHEN_SVC_PT"},
+ {TAC_PLUS_AUTHEN_SVC_RCMD, "TAC_PLUS_AUTHEN_SVC_RCMD"},
+ {TAC_PLUS_AUTHEN_SVC_X25, "TAC_PLUS_AUTHEN_SVC_X25"},
+ {TAC_PLUS_AUTHEN_SVC_NASI, "TAC_PLUS_AUTHEN_SVC_NASI"},
+ {TAC_PLUS_AUTHEN_SVC_FWPROXY, "TAC_PLUS_AUTHEN_SVC_FWPROXY"},
+ {0, NULL}};
+
+static value_string tacplus_reply_status_vals[] = {
+ {TAC_PLUS_AUTHEN_STATUS_PASS, "Authentication Passed"},
+ {TAC_PLUS_AUTHEN_STATUS_FAIL, "Authentication Failed"},
+ {TAC_PLUS_AUTHEN_STATUS_GETDATA, "Send Data"},
+ {TAC_PLUS_AUTHEN_STATUS_GETUSER, "Send Username"},
+ {TAC_PLUS_AUTHEN_STATUS_GETPASS, "Send Password"},
+ {TAC_PLUS_AUTHEN_STATUS_RESTART, "Restart Authentication Sequence"},
+ {TAC_PLUS_AUTHEN_STATUS_ERROR, "Unrecoverable Error"},
+ {TAC_PLUS_AUTHEN_STATUS_FOLLOW, "Use Alternate Server"},
+ {0, NULL}};
+
+
+static value_string tacplus_authen_method[] = {
+ {TAC_PLUS_AUTHEN_METH_NOT_SET, "NOT_SET"},
+ {TAC_PLUS_AUTHEN_METH_NONE, "NONE"},
+ {TAC_PLUS_AUTHEN_METH_KRB5, "KRB5"},
+ {TAC_PLUS_AUTHEN_METH_LINE, "LINE"},
+ {TAC_PLUS_AUTHEN_METH_ENABLE, "ENABLE"},
+ {TAC_PLUS_AUTHEN_METH_LOCAL, "LOCAL"},
+ {TAC_PLUS_AUTHEN_METH_TACACSPLUS, "TACACSPLUS"},
+ {TAC_PLUS_AUTHEN_METH_GUEST, "GUEST"},
+ {TAC_PLUS_AUTHEN_METH_RADIUS, "RADIUS"},
+ {TAC_PLUS_AUTHEN_METH_KRB4, "KRB4"},
+ {TAC_PLUS_AUTHEN_METH_RCMD, "RCMD"},
+ {0, NULL}};
+
+static value_string tacplus_author_status[] = {
+ {TAC_PLUS_AUTHOR_STATUS_PASS_ADD, "PASS_ADD"},
+ {TAC_PLUS_AUTHOR_STATUS_PASS_REPL, "PASS_REPL"},
+ {TAC_PLUS_AUTHOR_STATUS_FAIL, "FAIL"},
+ {TAC_PLUS_AUTHOR_STATUS_ERROR, "ERROR"},
+ {TAC_PLUS_AUTHOR_STATUS_FOLLOW, "FOLLOW"},
+ {0, NULL}};
+
+static value_string tacplus_acct_status[] = {
+ {TAC_PLUS_ACCT_STATUS_SUCCESS, "Success"},
+ {TAC_PLUS_ACCT_STATUS_ERROR, "Error"},
+ {TAC_PLUS_ACCT_STATUS_FOLLOW, "Follow"},
+ {0, NULL}};
+
+#ifdef __TAC_ACCOUNTING__
+static value_string tacplus_acct_flags[] = {
+ {TAC_PLUS_ACCT_FLAG_MORE, "More (deprecated)"},
+ {TAC_PLUS_ACCT_FLAG_START, "Start"},
+ {TAC_PLUS_ACCT_FLAG_STOP, "Stop"},
+ {TAC_PLUS_ACCT_FLAG_WATCHDOG,"Update"},
+ {0, NULL}};
+#endif
+
+#endif /* __PACKET_TACACS_H__ */