radius.h revision d5e4923d04122f81300fa68fb07d64ede28fd44d 
1/*
2 * RADIUS message processing
3 * Copyright (c) 2002-2009, 2012, 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
18struct 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
26enum { 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
43struct 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
51enum { 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};
95
96
97/* Termination-Action */
98#define RADIUS_TERMINATION_ACTION_DEFAULT 0
99#define RADIUS_TERMINATION_ACTION_RADIUS_REQUEST 1
100
101/* NAS-Port-Type */
102#define RADIUS_NAS_PORT_TYPE_IEEE_802_11 19
103
104/* Acct-Status-Type */
105#define RADIUS_ACCT_STATUS_TYPE_START 1
106#define RADIUS_ACCT_STATUS_TYPE_STOP 2
107#define RADIUS_ACCT_STATUS_TYPE_INTERIM_UPDATE 3
108#define RADIUS_ACCT_STATUS_TYPE_ACCOUNTING_ON 7
109#define RADIUS_ACCT_STATUS_TYPE_ACCOUNTING_OFF 8
110
111/* Acct-Authentic */
112#define RADIUS_ACCT_AUTHENTIC_RADIUS 1
113#define RADIUS_ACCT_AUTHENTIC_LOCAL 2
114#define RADIUS_ACCT_AUTHENTIC_REMOTE 3
115
116/* Acct-Terminate-Cause */
117#define RADIUS_ACCT_TERMINATE_CAUSE_USER_REQUEST 1
118#define RADIUS_ACCT_TERMINATE_CAUSE_LOST_CARRIER 2
119#define RADIUS_ACCT_TERMINATE_CAUSE_LOST_SERVICE 3
120#define RADIUS_ACCT_TERMINATE_CAUSE_IDLE_TIMEOUT 4
121#define RADIUS_ACCT_TERMINATE_CAUSE_SESSION_TIMEOUT 5
122#define RADIUS_ACCT_TERMINATE_CAUSE_ADMIN_RESET 6
123#define RADIUS_ACCT_TERMINATE_CAUSE_ADMIN_REBOOT 7
124#define RADIUS_ACCT_TERMINATE_CAUSE_PORT_ERROR 8
125#define RADIUS_ACCT_TERMINATE_CAUSE_NAS_ERROR 9
126#define RADIUS_ACCT_TERMINATE_CAUSE_NAS_REQUEST 10
127#define RADIUS_ACCT_TERMINATE_CAUSE_NAS_REBOOT 11
128#define RADIUS_ACCT_TERMINATE_CAUSE_PORT_UNNEEDED 12
129#define RADIUS_ACCT_TERMINATE_CAUSE_PORT_PREEMPTED 13
130#define RADIUS_ACCT_TERMINATE_CAUSE_PORT_SUSPENDED 14
131#define RADIUS_ACCT_TERMINATE_CAUSE_SERVICE_UNAVAILABLE 15
132#define RADIUS_ACCT_TERMINATE_CAUSE_CALLBACK 16
133#define RADIUS_ACCT_TERMINATE_CAUSE_USER_ERROR 17
134#define RADIUS_ACCT_TERMINATE_CAUSE_HOST_REQUEST 18
135
136#define RADIUS_TUNNEL_TAGS 32
137
138/* Tunnel-Type */
139#define RADIUS_TUNNEL_TYPE_PPTP 1
140#define RADIUS_TUNNEL_TYPE_L2TP 3
141#define RADIUS_TUNNEL_TYPE_IPIP 7
142#define RADIUS_TUNNEL_TYPE_GRE 10
143#define RADIUS_TUNNEL_TYPE_VLAN 13
144
145/* Tunnel-Medium-Type */
146#define RADIUS_TUNNEL_MEDIUM_TYPE_IPV4 1
147#define RADIUS_TUNNEL_MEDIUM_TYPE_IPV6 2
148#define RADIUS_TUNNEL_MEDIUM_TYPE_802 6
149
150
151struct radius_attr_vendor {
152	u8 vendor_type;
153	u8 vendor_length;
154} STRUCT_PACKED;
155
156#define RADIUS_VENDOR_ID_CISCO 9
157#define RADIUS_CISCO_AV_PAIR 1
158
159/* RFC 2548 - Microsoft Vendor-specific RADIUS Attributes */
160#define RADIUS_VENDOR_ID_MICROSOFT 311
161
162enum { RADIUS_VENDOR_ATTR_MS_MPPE_SEND_KEY = 16,
163       RADIUS_VENDOR_ATTR_MS_MPPE_RECV_KEY = 17
164};
165
166#ifdef _MSC_VER
167#pragma pack(pop)
168#endif /* _MSC_VER */
169
170struct radius_ms_mppe_keys {
171	u8 *send;
172	size_t send_len;
173	u8 *recv;
174	size_t recv_len;
175};
176
177
178struct radius_msg;
179
180/* Default size to be allocated for new RADIUS messages */
181#define RADIUS_DEFAULT_MSG_SIZE 1024
182
183/* Default size to be allocated for attribute array */
184#define RADIUS_DEFAULT_ATTR_COUNT 16
185
186
187/* MAC address ASCII format for IEEE 802.1X use
188 * (draft-congdon-radius-8021x-20.txt) */
189#define RADIUS_802_1X_ADDR_FORMAT "%02X-%02X-%02X-%02X-%02X-%02X"
190/* MAC address ASCII format for non-802.1X use */
191#define RADIUS_ADDR_FORMAT "%02x%02x%02x%02x%02x%02x"
192
193struct radius_hdr * radius_msg_get_hdr(struct radius_msg *msg);
194struct wpabuf * radius_msg_get_buf(struct radius_msg *msg);
195struct radius_msg * radius_msg_new(u8 code, u8 identifier);
196void radius_msg_free(struct radius_msg *msg);
197void radius_msg_dump(struct radius_msg *msg);
198int radius_msg_finish(struct radius_msg *msg, const u8 *secret,
199		      size_t secret_len);
200int radius_msg_finish_srv(struct radius_msg *msg, const u8 *secret,
201			  size_t secret_len, const u8 *req_authenticator);
202int radius_msg_finish_das_resp(struct radius_msg *msg, const u8 *secret,
203			       size_t secret_len,
204			       const struct radius_hdr *req_hdr);
205void radius_msg_finish_acct(struct radius_msg *msg, const u8 *secret,
206			    size_t secret_len);
207int radius_msg_verify_acct_req(struct radius_msg *msg, const u8 *secret,
208			       size_t secret_len);
209int radius_msg_verify_das_req(struct radius_msg *msg, const u8 *secret,
210			       size_t secret_len);
211struct radius_attr_hdr * radius_msg_add_attr(struct radius_msg *msg, u8 type,
212					     const u8 *data, size_t data_len);
213struct radius_msg * radius_msg_parse(const u8 *data, size_t len);
214int radius_msg_add_eap(struct radius_msg *msg, const u8 *data,
215		       size_t data_len);
216struct wpabuf * radius_msg_get_eap(struct radius_msg *msg);
217int radius_msg_verify(struct radius_msg *msg, const u8 *secret,
218		      size_t secret_len, struct radius_msg *sent_msg,
219		      int auth);
220int radius_msg_verify_msg_auth(struct radius_msg *msg, const u8 *secret,
221			       size_t secret_len, const u8 *req_auth);
222int radius_msg_copy_attr(struct radius_msg *dst, struct radius_msg *src,
223			 u8 type);
224void radius_msg_make_authenticator(struct radius_msg *msg,
225				   const u8 *data, size_t len);
226struct radius_ms_mppe_keys *
227radius_msg_get_ms_keys(struct radius_msg *msg, struct radius_msg *sent_msg,
228		       const u8 *secret, size_t secret_len);
229struct radius_ms_mppe_keys *
230radius_msg_get_cisco_keys(struct radius_msg *msg, struct radius_msg *sent_msg,
231			  const u8 *secret, size_t secret_len);
232int radius_msg_add_mppe_keys(struct radius_msg *msg,
233			     const u8 *req_authenticator,
234			     const u8 *secret, size_t secret_len,
235			     const u8 *send_key, size_t send_key_len,
236			     const u8 *recv_key, size_t recv_key_len);
237struct radius_attr_hdr *
238radius_msg_add_attr_user_password(struct radius_msg *msg,
239				  const u8 *data, size_t data_len,
240				  const u8 *secret, size_t secret_len);
241int radius_msg_get_attr(struct radius_msg *msg, u8 type, u8 *buf, size_t len);
242int radius_msg_get_vlanid(struct radius_msg *msg);
243char * radius_msg_get_tunnel_password(struct radius_msg *msg, int *keylen,
244				      const u8 *secret, size_t secret_len,
245				      struct radius_msg *sent_msg, size_t n);
246
247static inline int radius_msg_add_attr_int32(struct radius_msg *msg, u8 type,
248					    u32 value)
249{
250	u32 val = htonl(value);
251	return radius_msg_add_attr(msg, type, (u8 *) &val, 4) != NULL;
252}
253
254static inline int radius_msg_get_attr_int32(struct radius_msg *msg, u8 type,
255					    u32 *value)
256{
257	u32 val;
258	int res;
259	res = radius_msg_get_attr(msg, type, (u8 *) &val, 4);
260	if (res != 4)
261		return -1;
262
263	*value = ntohl(val);
264	return 0;
265}
266int radius_msg_get_attr_ptr(struct radius_msg *msg, u8 type, u8 **buf,
267			    size_t *len, const u8 *start);
268int radius_msg_count_attr(struct radius_msg *msg, u8 type, int min_len);
269
270
271struct radius_attr_data {
272	u8 *data;
273	size_t len;
274};
275
276struct radius_class_data {
277	struct radius_attr_data *attr;
278	size_t count;
279};
280
281void radius_free_class(struct radius_class_data *c);
282int radius_copy_class(struct radius_class_data *dst,
283		      const struct radius_class_data *src);
284
285u8 radius_msg_find_unlisted_attr(struct radius_msg *msg, u8 *attrs);
286
287#endif /* RADIUS_H */
288