1 /*
2 * RADIUS message processing
3 * Copyright (c) 2002-2009, 2012, 2014, Jouni Malinen <j@w1.fi>
4 *
5 * This software may be distributed under the terms of the BSD license.
6 * See README for more details.
7 */
8
9 #ifndef RADIUS_H
10 #define RADIUS_H
11
12 /* RFC 2865 - RADIUS */
13
14 #ifdef _MSC_VER
15 #pragma pack(push, 1)
16 #endif /* _MSC_VER */
17
18 struct radius_hdr {
19 u8 code;
20 u8 identifier;
21 be16 length; /* including this header */
22 u8 authenticator[16];
23 /* followed by length-20 octets of attributes */
24 } STRUCT_PACKED;
25
26 enum { RADIUS_CODE_ACCESS_REQUEST = 1,
27 RADIUS_CODE_ACCESS_ACCEPT = 2,
28 RADIUS_CODE_ACCESS_REJECT = 3,
29 RADIUS_CODE_ACCOUNTING_REQUEST = 4,
30 RADIUS_CODE_ACCOUNTING_RESPONSE = 5,
31 RADIUS_CODE_ACCESS_CHALLENGE = 11,
32 RADIUS_CODE_STATUS_SERVER = 12,
33 RADIUS_CODE_STATUS_CLIENT = 13,
34 RADIUS_CODE_DISCONNECT_REQUEST = 40,
35 RADIUS_CODE_DISCONNECT_ACK = 41,
36 RADIUS_CODE_DISCONNECT_NAK = 42,
37 RADIUS_CODE_COA_REQUEST = 43,
38 RADIUS_CODE_COA_ACK = 44,
39 RADIUS_CODE_COA_NAK = 45,
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_TUNNEL_PASSWORD = 69,
86 RADIUS_ATTR_CONNECT_INFO = 77,
87 RADIUS_ATTR_EAP_MESSAGE = 79,
88 RADIUS_ATTR_MESSAGE_AUTHENTICATOR = 80,
89 RADIUS_ATTR_TUNNEL_PRIVATE_GROUP_ID = 81,
90 RADIUS_ATTR_ACCT_INTERIM_INTERVAL = 85,
91 RADIUS_ATTR_CHARGEABLE_USER_IDENTITY = 89,
92 RADIUS_ATTR_NAS_IPV6_ADDRESS = 95,
93 RADIUS_ATTR_ERROR_CAUSE = 101,
94 RADIUS_ATTR_EAP_KEY_NAME = 102,
95 RADIUS_ATTR_MOBILITY_DOMAIN_ID = 177,
96 RADIUS_ATTR_WLAN_HESSID = 181,
97 RADIUS_ATTR_WLAN_PAIRWISE_CIPHER = 186,
98 RADIUS_ATTR_WLAN_GROUP_CIPHER = 187,
99 RADIUS_ATTR_WLAN_AKM_SUITE = 188,
100 RADIUS_ATTR_WLAN_GROUP_MGMT_CIPHER = 189,
101 };
102
103
104 /* Termination-Action */
105 #define RADIUS_TERMINATION_ACTION_DEFAULT 0
106 #define RADIUS_TERMINATION_ACTION_RADIUS_REQUEST 1
107
108 /* NAS-Port-Type */
109 #define RADIUS_NAS_PORT_TYPE_IEEE_802_11 19
110
111 /* Acct-Status-Type */
112 #define RADIUS_ACCT_STATUS_TYPE_START 1
113 #define RADIUS_ACCT_STATUS_TYPE_STOP 2
114 #define RADIUS_ACCT_STATUS_TYPE_INTERIM_UPDATE 3
115 #define RADIUS_ACCT_STATUS_TYPE_ACCOUNTING_ON 7
116 #define RADIUS_ACCT_STATUS_TYPE_ACCOUNTING_OFF 8
117
118 /* Acct-Authentic */
119 #define RADIUS_ACCT_AUTHENTIC_RADIUS 1
120 #define RADIUS_ACCT_AUTHENTIC_LOCAL 2
121 #define RADIUS_ACCT_AUTHENTIC_REMOTE 3
122
123 /* Acct-Terminate-Cause */
124 #define RADIUS_ACCT_TERMINATE_CAUSE_USER_REQUEST 1
125 #define RADIUS_ACCT_TERMINATE_CAUSE_LOST_CARRIER 2
126 #define RADIUS_ACCT_TERMINATE_CAUSE_LOST_SERVICE 3
127 #define RADIUS_ACCT_TERMINATE_CAUSE_IDLE_TIMEOUT 4
128 #define RADIUS_ACCT_TERMINATE_CAUSE_SESSION_TIMEOUT 5
129 #define RADIUS_ACCT_TERMINATE_CAUSE_ADMIN_RESET 6
130 #define RADIUS_ACCT_TERMINATE_CAUSE_ADMIN_REBOOT 7
131 #define RADIUS_ACCT_TERMINATE_CAUSE_PORT_ERROR 8
132 #define RADIUS_ACCT_TERMINATE_CAUSE_NAS_ERROR 9
133 #define RADIUS_ACCT_TERMINATE_CAUSE_NAS_REQUEST 10
134 #define RADIUS_ACCT_TERMINATE_CAUSE_NAS_REBOOT 11
135 #define RADIUS_ACCT_TERMINATE_CAUSE_PORT_UNNEEDED 12
136 #define RADIUS_ACCT_TERMINATE_CAUSE_PORT_PREEMPTED 13
137 #define RADIUS_ACCT_TERMINATE_CAUSE_PORT_SUSPENDED 14
138 #define RADIUS_ACCT_TERMINATE_CAUSE_SERVICE_UNAVAILABLE 15
139 #define RADIUS_ACCT_TERMINATE_CAUSE_CALLBACK 16
140 #define RADIUS_ACCT_TERMINATE_CAUSE_USER_ERROR 17
141 #define RADIUS_ACCT_TERMINATE_CAUSE_HOST_REQUEST 18
142
143 #define RADIUS_TUNNEL_TAGS 32
144
145 /* Tunnel-Type */
146 #define RADIUS_TUNNEL_TYPE_PPTP 1
147 #define RADIUS_TUNNEL_TYPE_L2TP 3
148 #define RADIUS_TUNNEL_TYPE_IPIP 7
149 #define RADIUS_TUNNEL_TYPE_GRE 10
150 #define RADIUS_TUNNEL_TYPE_VLAN 13
151
152 /* Tunnel-Medium-Type */
153 #define RADIUS_TUNNEL_MEDIUM_TYPE_IPV4 1
154 #define RADIUS_TUNNEL_MEDIUM_TYPE_IPV6 2
155 #define RADIUS_TUNNEL_MEDIUM_TYPE_802 6
156
157
158 struct radius_attr_vendor {
159 u8 vendor_type;
160 u8 vendor_length;
161 } STRUCT_PACKED;
162
163 #define RADIUS_VENDOR_ID_CISCO 9
164 #define RADIUS_CISCO_AV_PAIR 1
165
166 /* RFC 2548 - Microsoft Vendor-specific RADIUS Attributes */
167 #define RADIUS_VENDOR_ID_MICROSOFT 311
168
169 enum { RADIUS_VENDOR_ATTR_MS_MPPE_SEND_KEY = 16,
170 RADIUS_VENDOR_ATTR_MS_MPPE_RECV_KEY = 17
171 };
172
173
174 /* Hotspot 2.0 - WFA Vendor-specific RADIUS Attributes */
175 #define RADIUS_VENDOR_ID_WFA 40808
176
177 enum {
178 RADIUS_VENDOR_ATTR_WFA_HS20_SUBSCR_REMEDIATION = 1,
179 RADIUS_VENDOR_ATTR_WFA_HS20_AP_VERSION = 2,
180 RADIUS_VENDOR_ATTR_WFA_HS20_STA_VERSION = 3,
181 RADIUS_VENDOR_ATTR_WFA_HS20_DEAUTH_REQ = 4,
182 RADIUS_VENDOR_ATTR_WFA_HS20_SESSION_INFO_URL = 5,
183 };
184
185 #ifdef _MSC_VER
186 #pragma pack(pop)
187 #endif /* _MSC_VER */
188
189 struct radius_ms_mppe_keys {
190 u8 *send;
191 size_t send_len;
192 u8 *recv;
193 size_t recv_len;
194 };
195
196
197 struct radius_msg;
198
199 /* Default size to be allocated for new RADIUS messages */
200 #define RADIUS_DEFAULT_MSG_SIZE 1024
201
202 /* Default size to be allocated for attribute array */
203 #define RADIUS_DEFAULT_ATTR_COUNT 16
204
205
206 /* MAC address ASCII format for IEEE 802.1X use
207 * (draft-congdon-radius-8021x-20.txt) */
208 #define RADIUS_802_1X_ADDR_FORMAT "%02X-%02X-%02X-%02X-%02X-%02X"
209 /* MAC address ASCII format for non-802.1X use */
210 #define RADIUS_ADDR_FORMAT "%02x%02x%02x%02x%02x%02x"
211
212 struct radius_hdr * radius_msg_get_hdr(struct radius_msg *msg);
213 struct wpabuf * radius_msg_get_buf(struct radius_msg *msg);
214 struct radius_msg * radius_msg_new(u8 code, u8 identifier);
215 void radius_msg_free(struct radius_msg *msg);
216 void radius_msg_dump(struct radius_msg *msg);
217 int radius_msg_finish(struct radius_msg *msg, const u8 *secret,
218 size_t secret_len);
219 int radius_msg_finish_srv(struct radius_msg *msg, const u8 *secret,
220 size_t secret_len, const u8 *req_authenticator);
221 int radius_msg_finish_das_resp(struct radius_msg *msg, const u8 *secret,
222 size_t secret_len,
223 const struct radius_hdr *req_hdr);
224 void radius_msg_finish_acct(struct radius_msg *msg, const u8 *secret,
225 size_t secret_len);
226 void radius_msg_finish_acct_resp(struct radius_msg *msg, const u8 *secret,
227 size_t secret_len,
228 const u8 *req_authenticator);
229 int radius_msg_verify_acct_req(struct radius_msg *msg, const u8 *secret,
230 size_t secret_len);
231 int radius_msg_verify_das_req(struct radius_msg *msg, const u8 *secret,
232 size_t secret_len);
233 struct radius_attr_hdr * radius_msg_add_attr(struct radius_msg *msg, u8 type,
234 const u8 *data, size_t data_len);
235 struct radius_msg * radius_msg_parse(const u8 *data, size_t len);
236 int radius_msg_add_eap(struct radius_msg *msg, const u8 *data,
237 size_t data_len);
238 struct wpabuf * radius_msg_get_eap(struct radius_msg *msg);
239 int radius_msg_verify(struct radius_msg *msg, const u8 *secret,
240 size_t secret_len, struct radius_msg *sent_msg,
241 int auth);
242 int radius_msg_verify_msg_auth(struct radius_msg *msg, const u8 *secret,
243 size_t secret_len, const u8 *req_auth);
244 int radius_msg_copy_attr(struct radius_msg *dst, struct radius_msg *src,
245 u8 type);
246 void radius_msg_make_authenticator(struct radius_msg *msg,
247 const u8 *data, size_t len);
248 struct radius_ms_mppe_keys *
249 radius_msg_get_ms_keys(struct radius_msg *msg, struct radius_msg *sent_msg,
250 const u8 *secret, size_t secret_len);
251 struct radius_ms_mppe_keys *
252 radius_msg_get_cisco_keys(struct radius_msg *msg, struct radius_msg *sent_msg,
253 const u8 *secret, size_t secret_len);
254 int radius_msg_add_mppe_keys(struct radius_msg *msg,
255 const u8 *req_authenticator,
256 const u8 *secret, size_t secret_len,
257 const u8 *send_key, size_t send_key_len,
258 const u8 *recv_key, size_t recv_key_len);
259 int radius_msg_add_wfa(struct radius_msg *msg, u8 subtype, const u8 *data,
260 size_t len);
261 int radius_user_password_hide(struct radius_msg *msg,
262 const u8 *data, size_t data_len,
263 const u8 *secret, size_t secret_len,
264 u8 *buf, size_t buf_len);
265 struct radius_attr_hdr *
266 radius_msg_add_attr_user_password(struct radius_msg *msg,
267 const u8 *data, size_t data_len,
268 const u8 *secret, size_t secret_len);
269 int radius_msg_get_attr(struct radius_msg *msg, u8 type, u8 *buf, size_t len);
270 int radius_msg_get_vlanid(struct radius_msg *msg);
271 char * radius_msg_get_tunnel_password(struct radius_msg *msg, int *keylen,
272 const u8 *secret, size_t secret_len,
273 struct radius_msg *sent_msg, size_t n);
274
radius_msg_add_attr_int32(struct radius_msg * msg,u8 type,u32 value)275 static inline int radius_msg_add_attr_int32(struct radius_msg *msg, u8 type,
276 u32 value)
277 {
278 u32 val = htonl(value);
279 return radius_msg_add_attr(msg, type, (u8 *) &val, 4) != NULL;
280 }
281
radius_msg_get_attr_int32(struct radius_msg * msg,u8 type,u32 * value)282 static inline int radius_msg_get_attr_int32(struct radius_msg *msg, u8 type,
283 u32 *value)
284 {
285 u32 val;
286 int res;
287 res = radius_msg_get_attr(msg, type, (u8 *) &val, 4);
288 if (res != 4)
289 return -1;
290
291 *value = ntohl(val);
292 return 0;
293 }
294 int radius_msg_get_attr_ptr(struct radius_msg *msg, u8 type, u8 **buf,
295 size_t *len, const u8 *start);
296 int radius_msg_count_attr(struct radius_msg *msg, u8 type, int min_len);
297
298
299 struct radius_attr_data {
300 u8 *data;
301 size_t len;
302 };
303
304 struct radius_class_data {
305 struct radius_attr_data *attr;
306 size_t count;
307 };
308
309 void radius_free_class(struct radius_class_data *c);
310 int radius_copy_class(struct radius_class_data *dst,
311 const struct radius_class_data *src);
312
313 u8 radius_msg_find_unlisted_attr(struct radius_msg *msg, u8 *attrs);
314
315 #endif /* RADIUS_H */
316