1 /* 2 * hostapd / RADIUS message processing 3 * Copyright (c) 2002-2007, Jouni Malinen <j@w1.fi> 4 * 5 * This program is free software; you can redistribute it and/or modify 6 * it under the terms of the GNU General Public License version 2 as 7 * published by the Free Software Foundation. 8 * 9 * Alternatively, this software may be distributed under the terms of BSD 10 * license. 11 * 12 * See README and COPYING for more details. 13 */ 14 15 #ifndef RADIUS_H 16 #define RADIUS_H 17 18 /* RFC 2865 - RADIUS */ 19 20 #ifdef _MSC_VER 21 #pragma pack(push, 1) 22 #endif /* _MSC_VER */ 23 24 struct radius_hdr { 25 u8 code; 26 u8 identifier; 27 u16 length; /* including this header */ 28 u8 authenticator[16]; 29 /* followed by length-20 octets of attributes */ 30 } STRUCT_PACKED; 31 32 enum { RADIUS_CODE_ACCESS_REQUEST = 1, 33 RADIUS_CODE_ACCESS_ACCEPT = 2, 34 RADIUS_CODE_ACCESS_REJECT = 3, 35 RADIUS_CODE_ACCOUNTING_REQUEST = 4, 36 RADIUS_CODE_ACCOUNTING_RESPONSE = 5, 37 RADIUS_CODE_ACCESS_CHALLENGE = 11, 38 RADIUS_CODE_STATUS_SERVER = 12, 39 RADIUS_CODE_STATUS_CLIENT = 13, 40 RADIUS_CODE_RESERVED = 255 41 }; 42 43 struct radius_attr_hdr { 44 u8 type; 45 u8 length; /* including this header */ 46 /* followed by length-2 octets of attribute value */ 47 } STRUCT_PACKED; 48 49 #define RADIUS_MAX_ATTR_LEN (255 - sizeof(struct radius_attr_hdr)) 50 51 enum { RADIUS_ATTR_USER_NAME = 1, 52 RADIUS_ATTR_USER_PASSWORD = 2, 53 RADIUS_ATTR_NAS_IP_ADDRESS = 4, 54 RADIUS_ATTR_NAS_PORT = 5, 55 RADIUS_ATTR_FRAMED_MTU = 12, 56 RADIUS_ATTR_REPLY_MESSAGE = 18, 57 RADIUS_ATTR_STATE = 24, 58 RADIUS_ATTR_CLASS = 25, 59 RADIUS_ATTR_VENDOR_SPECIFIC = 26, 60 RADIUS_ATTR_SESSION_TIMEOUT = 27, 61 RADIUS_ATTR_IDLE_TIMEOUT = 28, 62 RADIUS_ATTR_TERMINATION_ACTION = 29, 63 RADIUS_ATTR_CALLED_STATION_ID = 30, 64 RADIUS_ATTR_CALLING_STATION_ID = 31, 65 RADIUS_ATTR_NAS_IDENTIFIER = 32, 66 RADIUS_ATTR_PROXY_STATE = 33, 67 RADIUS_ATTR_ACCT_STATUS_TYPE = 40, 68 RADIUS_ATTR_ACCT_DELAY_TIME = 41, 69 RADIUS_ATTR_ACCT_INPUT_OCTETS = 42, 70 RADIUS_ATTR_ACCT_OUTPUT_OCTETS = 43, 71 RADIUS_ATTR_ACCT_SESSION_ID = 44, 72 RADIUS_ATTR_ACCT_AUTHENTIC = 45, 73 RADIUS_ATTR_ACCT_SESSION_TIME = 46, 74 RADIUS_ATTR_ACCT_INPUT_PACKETS = 47, 75 RADIUS_ATTR_ACCT_OUTPUT_PACKETS = 48, 76 RADIUS_ATTR_ACCT_TERMINATE_CAUSE = 49, 77 RADIUS_ATTR_ACCT_MULTI_SESSION_ID = 50, 78 RADIUS_ATTR_ACCT_LINK_COUNT = 51, 79 RADIUS_ATTR_ACCT_INPUT_GIGAWORDS = 52, 80 RADIUS_ATTR_ACCT_OUTPUT_GIGAWORDS = 53, 81 RADIUS_ATTR_EVENT_TIMESTAMP = 55, 82 RADIUS_ATTR_NAS_PORT_TYPE = 61, 83 RADIUS_ATTR_TUNNEL_TYPE = 64, 84 RADIUS_ATTR_TUNNEL_MEDIUM_TYPE = 65, 85 RADIUS_ATTR_CONNECT_INFO = 77, 86 RADIUS_ATTR_EAP_MESSAGE = 79, 87 RADIUS_ATTR_MESSAGE_AUTHENTICATOR = 80, 88 RADIUS_ATTR_TUNNEL_PRIVATE_GROUP_ID = 81, 89 RADIUS_ATTR_ACCT_INTERIM_INTERVAL = 85, 90 RADIUS_ATTR_CHARGEABLE_USER_IDENTITY = 89, 91 RADIUS_ATTR_NAS_IPV6_ADDRESS = 95 92 }; 93 94 95 /* Termination-Action */ 96 #define RADIUS_TERMINATION_ACTION_DEFAULT 0 97 #define RADIUS_TERMINATION_ACTION_RADIUS_REQUEST 1 98 99 /* NAS-Port-Type */ 100 #define RADIUS_NAS_PORT_TYPE_IEEE_802_11 19 101 102 /* Acct-Status-Type */ 103 #define RADIUS_ACCT_STATUS_TYPE_START 1 104 #define RADIUS_ACCT_STATUS_TYPE_STOP 2 105 #define RADIUS_ACCT_STATUS_TYPE_INTERIM_UPDATE 3 106 #define RADIUS_ACCT_STATUS_TYPE_ACCOUNTING_ON 7 107 #define RADIUS_ACCT_STATUS_TYPE_ACCOUNTING_OFF 8 108 109 /* Acct-Authentic */ 110 #define RADIUS_ACCT_AUTHENTIC_RADIUS 1 111 #define RADIUS_ACCT_AUTHENTIC_LOCAL 2 112 #define RADIUS_ACCT_AUTHENTIC_REMOTE 3 113 114 /* Acct-Terminate-Cause */ 115 #define RADIUS_ACCT_TERMINATE_CAUSE_USER_REQUEST 1 116 #define RADIUS_ACCT_TERMINATE_CAUSE_LOST_CARRIER 2 117 #define RADIUS_ACCT_TERMINATE_CAUSE_LOST_SERVICE 3 118 #define RADIUS_ACCT_TERMINATE_CAUSE_IDLE_TIMEOUT 4 119 #define RADIUS_ACCT_TERMINATE_CAUSE_SESSION_TIMEOUT 5 120 #define RADIUS_ACCT_TERMINATE_CAUSE_ADMIN_RESET 6 121 #define RADIUS_ACCT_TERMINATE_CAUSE_ADMIN_REBOOT 7 122 #define RADIUS_ACCT_TERMINATE_CAUSE_PORT_ERROR 8 123 #define RADIUS_ACCT_TERMINATE_CAUSE_NAS_ERROR 9 124 #define RADIUS_ACCT_TERMINATE_CAUSE_NAS_REQUEST 10 125 #define RADIUS_ACCT_TERMINATE_CAUSE_NAS_REBOOT 11 126 #define RADIUS_ACCT_TERMINATE_CAUSE_PORT_UNNEEDED 12 127 #define RADIUS_ACCT_TERMINATE_CAUSE_PORT_PREEMPTED 13 128 #define RADIUS_ACCT_TERMINATE_CAUSE_PORT_SUSPENDED 14 129 #define RADIUS_ACCT_TERMINATE_CAUSE_SERVICE_UNAVAILABLE 15 130 #define RADIUS_ACCT_TERMINATE_CAUSE_CALLBACK 16 131 #define RADIUS_ACCT_TERMINATE_CAUSE_USER_ERROR 17 132 #define RADIUS_ACCT_TERMINATE_CAUSE_HOST_REQUEST 18 133 134 #define RADIUS_TUNNEL_TAGS 32 135 136 /* Tunnel-Type */ 137 #define RADIUS_TUNNEL_TYPE_PPTP 1 138 #define RADIUS_TUNNEL_TYPE_L2TP 3 139 #define RADIUS_TUNNEL_TYPE_IPIP 7 140 #define RADIUS_TUNNEL_TYPE_GRE 10 141 #define RADIUS_TUNNEL_TYPE_VLAN 13 142 143 /* Tunnel-Medium-Type */ 144 #define RADIUS_TUNNEL_MEDIUM_TYPE_IPV4 1 145 #define RADIUS_TUNNEL_MEDIUM_TYPE_IPV6 2 146 #define RADIUS_TUNNEL_MEDIUM_TYPE_802 6 147 148 149 struct radius_attr_vendor { 150 u8 vendor_type; 151 u8 vendor_length; 152 } STRUCT_PACKED; 153 154 #define RADIUS_VENDOR_ID_CISCO 9 155 #define RADIUS_CISCO_AV_PAIR 1 156 157 /* RFC 2548 - Microsoft Vendor-specific RADIUS Attributes */ 158 #define RADIUS_VENDOR_ID_MICROSOFT 311 159 160 enum { RADIUS_VENDOR_ATTR_MS_MPPE_SEND_KEY = 16, 161 RADIUS_VENDOR_ATTR_MS_MPPE_RECV_KEY = 17 162 }; 163 164 #ifdef _MSC_VER 165 #pragma pack(pop) 166 #endif /* _MSC_VER */ 167 168 struct radius_ms_mppe_keys { 169 u8 *send; 170 size_t send_len; 171 u8 *recv; 172 size_t recv_len; 173 }; 174 175 176 /* RADIUS message structure for new and parsed messages */ 177 struct radius_msg { 178 unsigned char *buf; 179 size_t buf_size; /* total size allocated for buf */ 180 size_t buf_used; /* bytes used in buf */ 181 182 struct radius_hdr *hdr; 183 184 size_t *attr_pos; /* array of indexes to attributes (number of bytes 185 * from buf to the beginning of 186 * struct radius_attr_hdr). */ 187 size_t attr_size; /* total size of the attribute pointer array */ 188 size_t attr_used; /* total number of attributes in the array */ 189 }; 190 191 192 /* Default size to be allocated for new RADIUS messages */ 193 #define RADIUS_DEFAULT_MSG_SIZE 1024 194 195 /* Default size to be allocated for attribute array */ 196 #define RADIUS_DEFAULT_ATTR_COUNT 16 197 198 199 /* MAC address ASCII format for IEEE 802.1X use 200 * (draft-congdon-radius-8021x-20.txt) */ 201 #define RADIUS_802_1X_ADDR_FORMAT "%02X-%02X-%02X-%02X-%02X-%02X" 202 /* MAC address ASCII format for non-802.1X use */ 203 #define RADIUS_ADDR_FORMAT "%02x%02x%02x%02x%02x%02x" 204 205 struct radius_msg *radius_msg_new(u8 code, u8 identifier); 206 int radius_msg_initialize(struct radius_msg *msg, size_t init_len); 207 void radius_msg_set_hdr(struct radius_msg *msg, u8 code, u8 identifier); 208 void radius_msg_free(struct radius_msg *msg); 209 void radius_msg_dump(struct radius_msg *msg); 210 int radius_msg_finish(struct radius_msg *msg, const u8 *secret, 211 size_t secret_len); 212 int radius_msg_finish_srv(struct radius_msg *msg, const u8 *secret, 213 size_t secret_len, const u8 *req_authenticator); 214 void radius_msg_finish_acct(struct radius_msg *msg, const u8 *secret, 215 size_t secret_len); 216 struct radius_attr_hdr *radius_msg_add_attr(struct radius_msg *msg, u8 type, 217 const u8 *data, size_t data_len); 218 struct radius_msg *radius_msg_parse(const u8 *data, size_t len); 219 int radius_msg_add_eap(struct radius_msg *msg, const u8 *data, 220 size_t data_len); 221 u8 *radius_msg_get_eap(struct radius_msg *msg, size_t *len); 222 int radius_msg_verify(struct radius_msg *msg, const u8 *secret, 223 size_t secret_len, struct radius_msg *sent_msg, 224 int auth); 225 int radius_msg_verify_msg_auth(struct radius_msg *msg, const u8 *secret, 226 size_t secret_len, const u8 *req_auth); 227 int radius_msg_copy_attr(struct radius_msg *dst, struct radius_msg *src, 228 u8 type); 229 void radius_msg_make_authenticator(struct radius_msg *msg, 230 const u8 *data, size_t len); 231 struct radius_ms_mppe_keys * 232 radius_msg_get_ms_keys(struct radius_msg *msg, struct radius_msg *sent_msg, 233 const u8 *secret, size_t secret_len); 234 struct radius_ms_mppe_keys * 235 radius_msg_get_cisco_keys(struct radius_msg *msg, struct radius_msg *sent_msg, 236 const u8 *secret, size_t secret_len); 237 int radius_msg_add_mppe_keys(struct radius_msg *msg, 238 const u8 *req_authenticator, 239 const u8 *secret, size_t secret_len, 240 const u8 *send_key, size_t send_key_len, 241 const u8 *recv_key, size_t recv_key_len); 242 struct radius_attr_hdr * 243 radius_msg_add_attr_user_password(struct radius_msg *msg, 244 const u8 *data, size_t data_len, 245 const u8 *secret, size_t secret_len); 246 int radius_msg_get_attr(struct radius_msg *msg, u8 type, u8 *buf, size_t len); 247 int radius_msg_get_vlanid(struct radius_msg *msg); 248 249 static inline int radius_msg_add_attr_int32(struct radius_msg *msg, u8 type, 250 u32 value) 251 { 252 u32 val = htonl(value); 253 return radius_msg_add_attr(msg, type, (u8 *) &val, 4) != NULL; 254 } 255 256 static inline int radius_msg_get_attr_int32(struct radius_msg *msg, u8 type, 257 u32 *value) 258 { 259 u32 val; 260 int res; 261 res = radius_msg_get_attr(msg, type, (u8 *) &val, 4); 262 if (res != 4) 263 return -1; 264 265 *value = ntohl(val); 266 return 0; 267 } 268 int radius_msg_get_attr_ptr(struct radius_msg *msg, u8 type, u8 **buf, 269 size_t *len, const u8 *start); 270 int radius_msg_count_attr(struct radius_msg *msg, u8 type, int min_len); 271 272 #endif /* RADIUS_H */ 273