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_OPERATOR_NAME = 126,
96 RADIUS_ATTR_LOCATION_INFO = 127,
97 RADIUS_ATTR_LOCATION_DATA = 128,
98 RADIUS_ATTR_BASIC_LOCATION_POLICY_RULES = 129,
99 RADIUS_ATTR_EXTENDED_LOCATION_POLICY_RULES = 130,
100 RADIUS_ATTR_LOCATION_CAPABLE = 131,
101 RADIUS_ATTR_REQUESTED_LOCATION_INFO = 132,
102 RADIUS_ATTR_MOBILITY_DOMAIN_ID = 177,
103 RADIUS_ATTR_WLAN_HESSID = 181,
104 RADIUS_ATTR_WLAN_PAIRWISE_CIPHER = 186,
105 RADIUS_ATTR_WLAN_GROUP_CIPHER = 187,
106 RADIUS_ATTR_WLAN_AKM_SUITE = 188,
107 RADIUS_ATTR_WLAN_GROUP_MGMT_CIPHER = 189,
108 };
109
110
111 /* Termination-Action */
112 #define RADIUS_TERMINATION_ACTION_DEFAULT 0
113 #define RADIUS_TERMINATION_ACTION_RADIUS_REQUEST 1
114
115 /* NAS-Port-Type */
116 #define RADIUS_NAS_PORT_TYPE_IEEE_802_11 19
117
118 /* Acct-Status-Type */
119 #define RADIUS_ACCT_STATUS_TYPE_START 1
120 #define RADIUS_ACCT_STATUS_TYPE_STOP 2
121 #define RADIUS_ACCT_STATUS_TYPE_INTERIM_UPDATE 3
122 #define RADIUS_ACCT_STATUS_TYPE_ACCOUNTING_ON 7
123 #define RADIUS_ACCT_STATUS_TYPE_ACCOUNTING_OFF 8
124
125 /* Acct-Authentic */
126 #define RADIUS_ACCT_AUTHENTIC_RADIUS 1
127 #define RADIUS_ACCT_AUTHENTIC_LOCAL 2
128 #define RADIUS_ACCT_AUTHENTIC_REMOTE 3
129
130 /* Acct-Terminate-Cause */
131 #define RADIUS_ACCT_TERMINATE_CAUSE_USER_REQUEST 1
132 #define RADIUS_ACCT_TERMINATE_CAUSE_LOST_CARRIER 2
133 #define RADIUS_ACCT_TERMINATE_CAUSE_LOST_SERVICE 3
134 #define RADIUS_ACCT_TERMINATE_CAUSE_IDLE_TIMEOUT 4
135 #define RADIUS_ACCT_TERMINATE_CAUSE_SESSION_TIMEOUT 5
136 #define RADIUS_ACCT_TERMINATE_CAUSE_ADMIN_RESET 6
137 #define RADIUS_ACCT_TERMINATE_CAUSE_ADMIN_REBOOT 7
138 #define RADIUS_ACCT_TERMINATE_CAUSE_PORT_ERROR 8
139 #define RADIUS_ACCT_TERMINATE_CAUSE_NAS_ERROR 9
140 #define RADIUS_ACCT_TERMINATE_CAUSE_NAS_REQUEST 10
141 #define RADIUS_ACCT_TERMINATE_CAUSE_NAS_REBOOT 11
142 #define RADIUS_ACCT_TERMINATE_CAUSE_PORT_UNNEEDED 12
143 #define RADIUS_ACCT_TERMINATE_CAUSE_PORT_PREEMPTED 13
144 #define RADIUS_ACCT_TERMINATE_CAUSE_PORT_SUSPENDED 14
145 #define RADIUS_ACCT_TERMINATE_CAUSE_SERVICE_UNAVAILABLE 15
146 #define RADIUS_ACCT_TERMINATE_CAUSE_CALLBACK 16
147 #define RADIUS_ACCT_TERMINATE_CAUSE_USER_ERROR 17
148 #define RADIUS_ACCT_TERMINATE_CAUSE_HOST_REQUEST 18
149
150 #define RADIUS_TUNNEL_TAGS 32
151
152 /* Tunnel-Type */
153 #define RADIUS_TUNNEL_TYPE_PPTP 1
154 #define RADIUS_TUNNEL_TYPE_L2TP 3
155 #define RADIUS_TUNNEL_TYPE_IPIP 7
156 #define RADIUS_TUNNEL_TYPE_GRE 10
157 #define RADIUS_TUNNEL_TYPE_VLAN 13
158
159 /* Tunnel-Medium-Type */
160 #define RADIUS_TUNNEL_MEDIUM_TYPE_IPV4 1
161 #define RADIUS_TUNNEL_MEDIUM_TYPE_IPV6 2
162 #define RADIUS_TUNNEL_MEDIUM_TYPE_802 6
163
164
165 struct radius_attr_vendor {
166 u8 vendor_type;
167 u8 vendor_length;
168 } STRUCT_PACKED;
169
170 #define RADIUS_VENDOR_ID_CISCO 9
171 #define RADIUS_CISCO_AV_PAIR 1
172
173 /* RFC 2548 - Microsoft Vendor-specific RADIUS Attributes */
174 #define RADIUS_VENDOR_ID_MICROSOFT 311
175
176 enum { RADIUS_VENDOR_ATTR_MS_MPPE_SEND_KEY = 16,
177 RADIUS_VENDOR_ATTR_MS_MPPE_RECV_KEY = 17
178 };
179
180
181 /* Hotspot 2.0 - WFA Vendor-specific RADIUS Attributes */
182 #define RADIUS_VENDOR_ID_WFA 40808
183
184 enum {
185 RADIUS_VENDOR_ATTR_WFA_HS20_SUBSCR_REMEDIATION = 1,
186 RADIUS_VENDOR_ATTR_WFA_HS20_AP_VERSION = 2,
187 RADIUS_VENDOR_ATTR_WFA_HS20_STA_VERSION = 3,
188 RADIUS_VENDOR_ATTR_WFA_HS20_DEAUTH_REQ = 4,
189 RADIUS_VENDOR_ATTR_WFA_HS20_SESSION_INFO_URL = 5,
190 };
191
192 #ifdef _MSC_VER
193 #pragma pack(pop)
194 #endif /* _MSC_VER */
195
196 struct radius_ms_mppe_keys {
197 u8 *send;
198 size_t send_len;
199 u8 *recv;
200 size_t recv_len;
201 };
202
203
204 struct radius_msg;
205
206 /* Default size to be allocated for new RADIUS messages */
207 #define RADIUS_DEFAULT_MSG_SIZE 1024
208
209 /* Default size to be allocated for attribute array */
210 #define RADIUS_DEFAULT_ATTR_COUNT 16
211
212
213 /* MAC address ASCII format for IEEE 802.1X use
214 * (draft-congdon-radius-8021x-20.txt) */
215 #define RADIUS_802_1X_ADDR_FORMAT "%02X-%02X-%02X-%02X-%02X-%02X"
216 /* MAC address ASCII format for non-802.1X use */
217 #define RADIUS_ADDR_FORMAT "%02x%02x%02x%02x%02x%02x"
218
219 struct radius_hdr * radius_msg_get_hdr(struct radius_msg *msg);
220 struct wpabuf * radius_msg_get_buf(struct radius_msg *msg);
221 struct radius_msg * radius_msg_new(u8 code, u8 identifier);
222 void radius_msg_free(struct radius_msg *msg);
223 void radius_msg_dump(struct radius_msg *msg);
224 int radius_msg_finish(struct radius_msg *msg, const u8 *secret,
225 size_t secret_len);
226 int radius_msg_finish_srv(struct radius_msg *msg, const u8 *secret,
227 size_t secret_len, const u8 *req_authenticator);
228 int radius_msg_finish_das_resp(struct radius_msg *msg, const u8 *secret,
229 size_t secret_len,
230 const struct radius_hdr *req_hdr);
231 void radius_msg_finish_acct(struct radius_msg *msg, const u8 *secret,
232 size_t secret_len);
233 void radius_msg_finish_acct_resp(struct radius_msg *msg, const u8 *secret,
234 size_t secret_len,
235 const u8 *req_authenticator);
236 int radius_msg_verify_acct_req(struct radius_msg *msg, const u8 *secret,
237 size_t secret_len);
238 int radius_msg_verify_das_req(struct radius_msg *msg, const u8 *secret,
239 size_t secret_len);
240 struct radius_attr_hdr * radius_msg_add_attr(struct radius_msg *msg, u8 type,
241 const u8 *data, size_t data_len);
242 struct radius_msg * radius_msg_parse(const u8 *data, size_t len);
243 int radius_msg_add_eap(struct radius_msg *msg, const u8 *data,
244 size_t data_len);
245 struct wpabuf * radius_msg_get_eap(struct radius_msg *msg);
246 int radius_msg_verify(struct radius_msg *msg, const u8 *secret,
247 size_t secret_len, struct radius_msg *sent_msg,
248 int auth);
249 int radius_msg_verify_msg_auth(struct radius_msg *msg, const u8 *secret,
250 size_t secret_len, const u8 *req_auth);
251 int radius_msg_copy_attr(struct radius_msg *dst, struct radius_msg *src,
252 u8 type);
253 void radius_msg_make_authenticator(struct radius_msg *msg,
254 const u8 *data, size_t len);
255 struct radius_ms_mppe_keys *
256 radius_msg_get_ms_keys(struct radius_msg *msg, struct radius_msg *sent_msg,
257 const u8 *secret, size_t secret_len);
258 struct radius_ms_mppe_keys *
259 radius_msg_get_cisco_keys(struct radius_msg *msg, struct radius_msg *sent_msg,
260 const u8 *secret, size_t secret_len);
261 int radius_msg_add_mppe_keys(struct radius_msg *msg,
262 const u8 *req_authenticator,
263 const u8 *secret, size_t secret_len,
264 const u8 *send_key, size_t send_key_len,
265 const u8 *recv_key, size_t recv_key_len);
266 int radius_msg_add_wfa(struct radius_msg *msg, u8 subtype, const u8 *data,
267 size_t len);
268 int radius_user_password_hide(struct radius_msg *msg,
269 const u8 *data, size_t data_len,
270 const u8 *secret, size_t secret_len,
271 u8 *buf, size_t buf_len);
272 struct radius_attr_hdr *
273 radius_msg_add_attr_user_password(struct radius_msg *msg,
274 const u8 *data, size_t data_len,
275 const u8 *secret, size_t secret_len);
276 int radius_msg_get_attr(struct radius_msg *msg, u8 type, u8 *buf, size_t len);
277 int radius_msg_get_vlanid(struct radius_msg *msg);
278 char * radius_msg_get_tunnel_password(struct radius_msg *msg, int *keylen,
279 const u8 *secret, size_t secret_len,
280 struct radius_msg *sent_msg, size_t n);
281
radius_msg_add_attr_int32(struct radius_msg * msg,u8 type,u32 value)282 static inline int radius_msg_add_attr_int32(struct radius_msg *msg, u8 type,
283 u32 value)
284 {
285 u32 val = htonl(value);
286 return radius_msg_add_attr(msg, type, (u8 *) &val, 4) != NULL;
287 }
288
radius_msg_get_attr_int32(struct radius_msg * msg,u8 type,u32 * value)289 static inline int radius_msg_get_attr_int32(struct radius_msg *msg, u8 type,
290 u32 *value)
291 {
292 u32 val;
293 int res;
294 res = radius_msg_get_attr(msg, type, (u8 *) &val, 4);
295 if (res != 4)
296 return -1;
297
298 *value = ntohl(val);
299 return 0;
300 }
301 int radius_msg_get_attr_ptr(struct radius_msg *msg, u8 type, u8 **buf,
302 size_t *len, const u8 *start);
303 int radius_msg_count_attr(struct radius_msg *msg, u8 type, int min_len);
304
305
306 struct radius_attr_data {
307 u8 *data;
308 size_t len;
309 };
310
311 struct radius_class_data {
312 struct radius_attr_data *attr;
313 size_t count;
314 };
315
316 void radius_free_class(struct radius_class_data *c);
317 int radius_copy_class(struct radius_class_data *dst,
318 const struct radius_class_data *src);
319
320 u8 radius_msg_find_unlisted_attr(struct radius_msg *msg, u8 *attrs);
321
322 #endif /* RADIUS_H */
323