1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause 3 * 4 * Copyright (c) 1998, 2001, Juniper Networks, Inc. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 * 28 * $FreeBSD$ 29 */ 30 31 #ifndef TACLIB_PRIVATE_H 32 #define TACLIB_PRIVATE_H 33 34 #include "taclib.h" 35 36 /* Defaults */ 37 #define PATH_TACPLUS_CONF "/etc/tacplus.conf" 38 #define TACPLUS_PORT 49 39 #define TIMEOUT 3 /* In seconds */ 40 41 /* Limits */ 42 #define BODYSIZE 8150 /* Maximum message body size */ 43 #define ERRSIZE 128 /* Maximum error message length */ 44 #define MAXCONFLINE 1024 /* Maximum config file line length */ 45 #define MAXSERVERS 10 /* Maximum number of servers to try */ 46 #define MAXAVPAIRS 255 /* Maximum number of AV pairs */ 47 48 /* Protocol constants. */ 49 #define HDRSIZE 12 /* Size of message header */ 50 51 /* Protocol version number */ 52 #define TAC_VER_MAJOR 0xc /* Major version number */ 53 54 /* Protocol packet types */ 55 #define TAC_AUTHEN 0x01 /* Authentication */ 56 #define TAC_AUTHOR 0x02 /* Authorization */ 57 #define TAC_ACCT 0x03 /* Accouting */ 58 59 /* Protocol header flags */ 60 #define TAC_UNENCRYPTED 0x01 61 #define TAC_SINGLE_CONNECT 0x04 62 63 struct tac_str { 64 char *data; 65 size_t len; 66 }; 67 68 struct tac_authen_start { 69 u_int8_t action; 70 u_int8_t priv_lvl; 71 u_int8_t authen_type; 72 u_int8_t service; 73 u_int8_t user_len; 74 u_int8_t port_len; 75 u_int8_t rem_addr_len; 76 u_int8_t data_len; 77 unsigned char rest[1]; 78 }; 79 80 struct tac_authen_reply { 81 u_int8_t status; 82 u_int8_t flags; 83 u_int16_t msg_len; 84 u_int16_t data_len; 85 unsigned char rest[1]; 86 }; 87 88 struct tac_authen_cont { 89 u_int16_t user_msg_len; 90 u_int16_t data_len; 91 u_int8_t flags; 92 unsigned char rest[1]; 93 }; 94 95 struct tac_author_request { 96 u_int8_t authen_meth; 97 u_int8_t priv_lvl; 98 u_int8_t authen_type; 99 u_int8_t service; 100 u_int8_t user_len; 101 u_int8_t port_len; 102 u_int8_t rem_addr_len; 103 u_int8_t av_cnt; 104 unsigned char rest[1]; 105 }; 106 107 struct tac_author_response { 108 u_int8_t status; 109 u_int8_t av_cnt; 110 u_int16_t msg_len; 111 u_int16_t data_len; 112 unsigned char rest[1]; 113 }; 114 115 struct tac_acct_start { 116 u_int8_t action; 117 u_int8_t authen_action; 118 u_int8_t priv_lvl; 119 u_int8_t authen_type; 120 u_int8_t authen_service; 121 u_int8_t user_len; 122 u_int8_t port_len; 123 u_int8_t rem_addr_len; 124 u_int8_t av_cnt; 125 unsigned char rest[1]; 126 }; 127 128 struct tac_acct_reply { 129 u_int16_t msg_len; 130 u_int16_t data_len; 131 u_int8_t status; 132 unsigned char rest[1]; 133 }; 134 135 struct tac_msg { 136 u_int8_t version; 137 u_int8_t type; 138 u_int8_t seq_no; 139 u_int8_t flags; 140 u_int8_t session_id[4]; 141 u_int32_t length; 142 union { 143 struct tac_authen_start authen_start; 144 struct tac_authen_reply authen_reply; 145 struct tac_authen_cont authen_cont; 146 struct tac_author_request author_request; 147 struct tac_author_response author_response; 148 struct tac_acct_start acct_start; 149 struct tac_acct_reply acct_reply; 150 unsigned char body[BODYSIZE]; 151 } u; 152 }; 153 154 struct tac_server { 155 struct sockaddr_in addr; /* Address of server */ 156 char *secret; /* Shared secret */ 157 int timeout; /* Timeout in seconds */ 158 int flags; 159 unsigned int navs; 160 struct tac_str avs[MAXAVPAIRS]; 161 }; 162 163 struct tac_handle { 164 int fd; /* Socket file descriptor */ 165 struct tac_server servers[MAXSERVERS]; /* Servers to contact */ 166 int num_servers; /* Number of valid server entries */ 167 int cur_server; /* Server we are currently using */ 168 int single_connect; /* Use a single connection */ 169 int last_seq_no; 170 char errmsg[ERRSIZE]; /* Most recent error message */ 171 172 struct tac_str user; 173 struct tac_str port; 174 struct tac_str rem_addr; 175 struct tac_str data; 176 struct tac_str user_msg; 177 struct tac_str avs[MAXAVPAIRS]; 178 179 struct tac_msg request; 180 struct tac_msg response; 181 182 int srvr_pos; /* Scan position in response body */ 183 unsigned int srvr_navs; 184 struct tac_str srvr_msg; 185 struct tac_str srvr_data; 186 struct tac_str srvr_avs[MAXAVPAIRS]; 187 }; 188 189 #define is_alpha(ch) /* alphabetical */ \ 190 (((ch) >= 'A' && (ch) <= 'Z') || ((ch) >= 'a' && (ch) <= 'z')) 191 #define is_num(ch) /* numerical */ \ 192 ((ch) >= '0' && (ch) <= '9') 193 #define is_alnum(ch) /* alphanumerical */ \ 194 (is_alpha(ch) || is_num(ch)) 195 #define is_arg(ch) /* valid in an argument name */ \ 196 (is_alnum(ch) || (ch) == '_' || (ch) == '-') 197 198 #endif 199