contrib/hostapd/radius.h

   1 /*
   2  * hostapd / RADIUS message processing
   3  * Copyright (c) 2002-2005, 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_STATE = 24,
  57        RADIUS_ATTR_CLASS = 25,
  58        RADIUS_ATTR_VENDOR_SPECIFIC = 26,
  59        RADIUS_ATTR_SESSION_TIMEOUT = 27,
  60        RADIUS_ATTR_IDLE_TIMEOUT = 28,
  61        RADIUS_ATTR_TERMINATION_ACTION = 29,
  62        RADIUS_ATTR_CALLED_STATION_ID = 30,
  63        RADIUS_ATTR_CALLING_STATION_ID = 31,
  64        RADIUS_ATTR_NAS_IDENTIFIER = 32,
  65        RADIUS_ATTR_ACCT_STATUS_TYPE = 40,
  66        RADIUS_ATTR_ACCT_DELAY_TIME = 41,
  67        RADIUS_ATTR_ACCT_INPUT_OCTETS = 42,
  68        RADIUS_ATTR_ACCT_OUTPUT_OCTETS = 43,
  69        RADIUS_ATTR_ACCT_SESSION_ID = 44,
  70        RADIUS_ATTR_ACCT_AUTHENTIC = 45,
  71        RADIUS_ATTR_ACCT_SESSION_TIME = 46,
  72        RADIUS_ATTR_ACCT_INPUT_PACKETS = 47,
  73        RADIUS_ATTR_ACCT_OUTPUT_PACKETS = 48,
  74        RADIUS_ATTR_ACCT_TERMINATE_CAUSE = 49,
  75        RADIUS_ATTR_ACCT_MULTI_SESSION_ID = 50,
  76        RADIUS_ATTR_ACCT_LINK_COUNT = 51,
  77        RADIUS_ATTR_ACCT_INPUT_GIGAWORDS = 52,
  78        RADIUS_ATTR_ACCT_OUTPUT_GIGAWORDS = 53,
  79        RADIUS_ATTR_EVENT_TIMESTAMP = 55,
  80        RADIUS_ATTR_NAS_PORT_TYPE = 61,
  81        RADIUS_ATTR_TUNNEL_TYPE = 64,
  82        RADIUS_ATTR_TUNNEL_MEDIUM_TYPE = 65,
  83        RADIUS_ATTR_CONNECT_INFO = 77,
  84        RADIUS_ATTR_EAP_MESSAGE = 79,
  85        RADIUS_ATTR_MESSAGE_AUTHENTICATOR = 80,
  86        RADIUS_ATTR_TUNNEL_PRIVATE_GROUP_ID = 81,
  87        RADIUS_ATTR_ACCT_INTERIM_INTERVAL = 85,
  88        RADIUS_ATTR_NAS_IPV6_ADDRESS = 95
  89 };
  90
  91
  92 /* Termination-Action */
  93 #define RADIUS_TERMINATION_ACTION_DEFAULT 0
  94 #define RADIUS_TERMINATION_ACTION_RADIUS_REQUEST 1
  95
  96 /* NAS-Port-Type */
  97 #define RADIUS_NAS_PORT_TYPE_IEEE_802_11 19
  98
  99 /* Acct-Status-Type */
 100 #define RADIUS_ACCT_STATUS_TYPE_START 1
 101 #define RADIUS_ACCT_STATUS_TYPE_STOP 2
 102 #define RADIUS_ACCT_STATUS_TYPE_INTERIM_UPDATE 3
 103 #define RADIUS_ACCT_STATUS_TYPE_ACCOUNTING_ON 7
 104 #define RADIUS_ACCT_STATUS_TYPE_ACCOUNTING_OFF 8
 105
 106 /* Acct-Authentic */
 107 #define RADIUS_ACCT_AUTHENTIC_RADIUS 1
 108 #define RADIUS_ACCT_AUTHENTIC_LOCAL 2
 109 #define RADIUS_ACCT_AUTHENTIC_REMOTE 3
 110
 111 /* Acct-Terminate-Cause */
 112 #define RADIUS_ACCT_TERMINATE_CAUSE_USER_REQUEST 1
 113 #define RADIUS_ACCT_TERMINATE_CAUSE_LOST_CARRIER 2
 114 #define RADIUS_ACCT_TERMINATE_CAUSE_LOST_SERVICE 3
 115 #define RADIUS_ACCT_TERMINATE_CAUSE_IDLE_TIMEOUT 4
 116 #define RADIUS_ACCT_TERMINATE_CAUSE_SESSION_TIMEOUT 5
 117 #define RADIUS_ACCT_TERMINATE_CAUSE_ADMIN_RESET 6
 118 #define RADIUS_ACCT_TERMINATE_CAUSE_ADMIN_REBOOT 7
 119 #define RADIUS_ACCT_TERMINATE_CAUSE_PORT_ERROR 8
 120 #define RADIUS_ACCT_TERMINATE_CAUSE_NAS_ERROR 9
 121 #define RADIUS_ACCT_TERMINATE_CAUSE_NAS_REQUEST 10
 122 #define RADIUS_ACCT_TERMINATE_CAUSE_NAS_REBOOT 11
 123 #define RADIUS_ACCT_TERMINATE_CAUSE_PORT_UNNEEDED 12
 124 #define RADIUS_ACCT_TERMINATE_CAUSE_PORT_PREEMPTED 13
 125 #define RADIUS_ACCT_TERMINATE_CAUSE_PORT_SUSPENDED 14
 126 #define RADIUS_ACCT_TERMINATE_CAUSE_SERVICE_UNAVAILABLE 15
 127 #define RADIUS_ACCT_TERMINATE_CAUSE_CALLBACK 16
 128 #define RADIUS_ACCT_TERMINATE_CAUSE_USER_ERROR 17
 129 #define RADIUS_ACCT_TERMINATE_CAUSE_HOST_REQUEST 18
 130
 131 #define RADIUS_TUNNEL_TAGS 32
 132
 133 /* Tunnel-Type */
 134 #define RADIUS_TUNNEL_TYPE_PPTP 1
 135 #define RADIUS_TUNNEL_TYPE_L2TP 3
 136 #define RADIUS_TUNNEL_TYPE_IPIP 7
 137 #define RADIUS_TUNNEL_TYPE_GRE 10
 138 #define RADIUS_TUNNEL_TYPE_VLAN 13
 139
 140 /* Tunnel-Medium-Type */
 141 #define RADIUS_TUNNEL_MEDIUM_TYPE_IPV4 1
 142 #define RADIUS_TUNNEL_MEDIUM_TYPE_IPV6 2
 143 #define RADIUS_TUNNEL_MEDIUM_TYPE_802 6
 144
 145
 146 struct radius_attr_vendor {
 147         u8 vendor_type;
 148         u8 vendor_length;
 149 } STRUCT_PACKED;
 150
 151 #define RADIUS_VENDOR_ID_CISCO 9
 152 #define RADIUS_CISCO_AV_PAIR 1
 153
 154 /* RFC 2548 - Microsoft Vendor-specific RADIUS Attributes */
 155 #define RADIUS_VENDOR_ID_MICROSOFT 311
 156
 157 enum { RADIUS_VENDOR_ATTR_MS_MPPE_SEND_KEY = 16,
 158        RADIUS_VENDOR_ATTR_MS_MPPE_RECV_KEY = 17
 159 };
 160
 161 #ifdef _MSC_VER
 162 #pragma pack(pop)
 163 #endif /* _MSC_VER */
 164
 165 struct radius_ms_mppe_keys {
 166         u8 *send;
 167         size_t send_len;
 168         u8 *recv;
 169         size_t recv_len;
 170 };
 171
 172
 173 /* RADIUS message structure for new and parsed messages */
 174 struct radius_msg {
 175         unsigned char *buf;
 176         size_t buf_size; /* total size allocated for buf */
 177         size_t buf_used; /* bytes used in buf */
 178
 179         struct radius_hdr *hdr;
 180
 181         struct radius_attr_hdr **attrs; /* array of pointers to attributes */
 182         size_t attr_size; /* total size of the attribute pointer array */
 183         size_t attr_used; /* total number of attributes in the array */
 184 };
 185
 186
 187 /* Default size to be allocated for new RADIUS messages */
 188 #define RADIUS_DEFAULT_MSG_SIZE 1024
 189
 190 /* Default size to be allocated for attribute array */
 191 #define RADIUS_DEFAULT_ATTR_COUNT 16
 192
 193
 194 /* MAC address ASCII format for IEEE 802.1X use
 195  * (draft-congdon-radius-8021x-20.txt) */
 196 #define RADIUS_802_1X_ADDR_FORMAT "%02X-%02X-%02X-%02X-%02X-%02X"
 197 /* MAC address ASCII format for non-802.1X use */
 198 #define RADIUS_ADDR_FORMAT "%02x%02x%02x%02x%02x%02x"
 199
 200 struct radius_msg *radius_msg_new(u8 code, u8 identifier);
 201 int radius_msg_initialize(struct radius_msg *msg, size_t init_len);
 202 void radius_msg_set_hdr(struct radius_msg *msg, u8 code, u8 identifier);
 203 void radius_msg_free(struct radius_msg *msg);
 204 void radius_msg_dump(struct radius_msg *msg);
 205 int radius_msg_finish(struct radius_msg *msg, u8 *secret, size_t secret_len);
 206 int radius_msg_finish_srv(struct radius_msg *msg, const u8 *secret,
 207                           size_t secret_len, const u8 *req_authenticator);
 208 void radius_msg_finish_acct(struct radius_msg *msg, u8 *secret,
 209                             size_t secret_len);
 210 struct radius_attr_hdr *radius_msg_add_attr(struct radius_msg *msg, u8 type,
 211                                             const u8 *data, size_t data_len);
 212 struct radius_msg *radius_msg_parse(const u8 *data, size_t len);
 213 int radius_msg_add_eap(struct radius_msg *msg, const u8 *data,
 214                        size_t data_len);
 215 u8 *radius_msg_get_eap(struct radius_msg *msg, size_t *len);
 216 int radius_msg_verify(struct radius_msg *msg, const u8 *secret,
 217                       size_t secret_len, struct radius_msg *sent_msg,
 218                       int auth);
 219 int radius_msg_verify_msg_auth(struct radius_msg *msg, const u8 *secret,
 220                                size_t secret_len, const u8 *req_auth);
 221 int radius_msg_copy_attr(struct radius_msg *dst, struct radius_msg *src,
 222                          u8 type);
 223 void radius_msg_make_authenticator(struct radius_msg *msg,
 224                                    const u8 *data, size_t len);
 225 struct radius_ms_mppe_keys *
 226 radius_msg_get_ms_keys(struct radius_msg *msg, struct radius_msg *sent_msg,
 227                        u8 *secret, size_t secret_len);
 228 struct radius_ms_mppe_keys *
 229 radius_msg_get_cisco_keys(struct radius_msg *msg, struct radius_msg *sent_msg,
 230                           u8 *secret, size_t secret_len);
 231 int radius_msg_add_mppe_keys(struct radius_msg *msg,
 232                              const u8 *req_authenticator,
 233                              const u8 *secret, size_t secret_len,
 234                              const u8 *send_key, size_t send_key_len,
 235                              const u8 *recv_key, size_t recv_key_len);
 236 struct radius_attr_hdr *
 237 radius_msg_add_attr_user_password(struct radius_msg *msg,
 238                                   u8 *data, size_t data_len,
 239                                   u8 *secret, size_t secret_len);
 240 int radius_msg_get_attr(struct radius_msg *msg, u8 type, u8 *buf, size_t len);
 241 int radius_msg_get_vlanid(struct radius_msg *msg);
 242
 243 static inline int radius_msg_add_attr_int32(struct radius_msg *msg, u8 type,
 244                                             u32 value)
 245 {
 246         u32 val = htonl(value);
 247         return radius_msg_add_attr(msg, type, (u8 *) &val, 4) != NULL;
 248 }
 249
 250 static inline int radius_msg_get_attr_int32(struct radius_msg *msg, u8 type,
 251                                             u32 *value)
 252 {
 253         u32 val;
 254         int res;
 255         res = radius_msg_get_attr(msg, type, (u8 *) &val, 4);
 256         if (res != 4)
 257                 return -1;
 258
 259         *value = ntohl(val);
 260         return 0;
 261 }
 262 int radius_msg_get_attr_ptr(struct radius_msg *msg, u8 type, u8 **buf,
 263                             size_t *len, const u8 *start);
 264 int radius_msg_count_attr(struct radius_msg *msg, u8 type, int min_len);
 265
 266 #endif /* RADIUS_H */