text: ﻿/*
   * RADIUS message processing
   * Copyright (c) 2002-2009, Jouni Malinen <j@w1.fi>
   *
   * This program is free software; you can redistribute it and/or modify
   * it under the terms of the GNU General Public License version 2 as
   * published by the Free Software Foundation.
   *
   * Alternatively, this software may be distributed under the terms of BSD
   * license.
   *
   * See README and COPYING for more details.
   */
  
  #ifndef RADIUS_H
  #define RADIUS_H
  
  /* RFC 2865 - RADIUS */
  
  #ifdef _MSC_VER
  #pragma pack(push, 1)
  #endif /* _MSC_VER */
  
  struct radius_hdr {
  	u8 code;
  	u8 identifier;
  	u16 length; /* including this header */
  	u8 authenticator[16];
  	/* followed by length-20 octets of attributes */
  } STRUCT_PACKED;
  
  enum { RADIUS_CODE_ACCESS_REQUEST = 1,
         RADIUS_CODE_ACCESS_ACCEPT = 2,
         RADIUS_CODE_ACCESS_REJECT = 3,
         RADIUS_CODE_ACCOUNTING_REQUEST = 4,
         RADIUS_CODE_ACCOUNTING_RESPONSE = 5,
         RADIUS_CODE_ACCESS_CHALLENGE = 11,
         RADIUS_CODE_STATUS_SERVER = 12,
         RADIUS_CODE_STATUS_CLIENT = 13,
         RADIUS_CODE_RESERVED = 255
  };
  
  struct radius_attr_hdr {
  	u8 type;
  	u8 length; /* including this header */
  	/* followed by length-2 octets of attribute value */
  } STRUCT_PACKED;
  
  #define RADIUS_MAX_ATTR_LEN (255 - sizeof(struct radius_attr_hdr))
  
  enum { RADIUS_ATTR_USER_NAME = 1,
         RADIUS_ATTR_USER_PASSWORD = 2,
         RADIUS_ATTR_NAS_IP_ADDRESS = 4,
         RADIUS_ATTR_NAS_PORT = 5,
         RADIUS_ATTR_FRAMED_MTU = 12,
         RADIUS_ATTR_REPLY_MESSAGE = 18,
         RADIUS_ATTR_STATE = 24,
         RADIUS_ATTR_CLASS = 25,
         RADIUS_ATTR_VENDOR_SPECIFIC = 26,
         RADIUS_ATTR_SESSION_TIMEOUT = 27,
         RADIUS_ATTR_IDLE_TIMEOUT = 28,
         RADIUS_ATTR_TERMINATION_ACTION = 29,
         RADIUS_ATTR_CALLED_STATION_ID = 30,
         RADIUS_ATTR_CALLING_STATION_ID = 31,
         RADIUS_ATTR_NAS_IDENTIFIER = 32,
         RADIUS_ATTR_PROXY_STATE = 33,
         RADIUS_ATTR_ACCT_STATUS_TYPE = 40,
         RADIUS_ATTR_ACCT_DELAY_TIME = 41,
         RADIUS_ATTR_ACCT_INPUT_OCTETS = 42,
         RADIUS_ATTR_ACCT_OUTPUT_OCTETS = 43,
         RADIUS_ATTR_ACCT_SESSION_ID = 44,
         RADIUS_ATTR_ACCT_AUTHENTIC = 45,
         RADIUS_ATTR_ACCT_SESSION_TIME = 46,
         RADIUS_ATTR_ACCT_INPUT_PACKETS = 47,
         RADIUS_ATTR_ACCT_OUTPUT_PACKETS = 48,
         RADIUS_ATTR_ACCT_TERMINATE_CAUSE = 49,
         RADIUS_ATTR_ACCT_MULTI_SESSION_ID = 50,
         RADIUS_ATTR_ACCT_LINK_COUNT = 51,
         RADIUS_ATTR_ACCT_INPUT_GIGAWORDS = 52,
         RADIUS_ATTR_ACCT_OUTPUT_GIGAWORDS = 53,
         RADIUS_ATTR_EVENT_TIMESTAMP = 55,
         RADIUS_ATTR_NAS_PORT_TYPE = 61,
         RADIUS_ATTR_TUNNEL_TYPE = 64,
         RADIUS_ATTR_TUNNEL_MEDIUM_TYPE = 65,
         RADIUS_ATTR_CONNECT_INFO = 77,
         RADIUS_ATTR_EAP_MESSAGE = 79,
         RADIUS_ATTR_MESSAGE_AUTHENTICATOR = 80,
         RADIUS_ATTR_TUNNEL_PRIVATE_GROUP_ID = 81,
         RADIUS_ATTR_ACCT_INTERIM_INTERVAL = 85,
         RADIUS_ATTR_CHARGEABLE_USER_IDENTITY = 89,
         RADIUS_ATTR_NAS_IPV6_ADDRESS = 95
  };
  
  
  /* Termination-Action */
  #define RADIUS_TERMINATION_ACTION_DEFAULT 0
  #define RADIUS_TERMINATION_ACTION_RADIUS_REQUEST 1
  
  /* NAS-Port-Type */
  #define RADIUS_NAS_PORT_TYPE_IEEE_802_11 19
  
  /* Acct-Status-Type */
  #define RADIUS_ACCT_STATUS_TYPE_START 1
  #define RADIUS_ACCT_STATUS_TYPE_STOP 2
  #define RADIUS_ACCT_STATUS_TYPE_INTERIM_UPDATE 3
  #define RADIUS_ACCT_STATUS_TYPE_ACCOUNTING_ON 7
  #define RADIUS_ACCT_STATUS_TYPE_ACCOUNTING_OFF 8
  
  /* Acct-Authentic */
  #define RADIUS_ACCT_AUTHENTIC_RADIUS 1
  #define RADIUS_ACCT_AUTHENTIC_LOCAL 2
  #define RADIUS_ACCT_AUTHENTIC_REMOTE 3
  
  /* Acct-Terminate-Cause */
  #define RADIUS_ACCT_TERMINATE_CAUSE_USER_REQUEST 1
  #define RADIUS_ACCT_TERMINATE_CAUSE_LOST_CARRIER 2
  #define RADIUS_ACCT_TERMINATE_CAUSE_LOST_SERVICE 3
  #define RADIUS_ACCT_TERMINATE_CAUSE_IDLE_TIMEOUT 4
  #define RADIUS_ACCT_TERMINATE_CAUSE_SESSION_TIMEOUT 5
  #define RADIUS_ACCT_TERMINATE_CAUSE_ADMIN_RESET 6
  #define RADIUS_ACCT_TERMINATE_CAUSE_ADMIN_REBOOT 7
  #define RADIUS_ACCT_TERMINATE_CAUSE_PORT_ERROR 8
  #define RADIUS_ACCT_TERMINATE_CAUSE_NAS_ERROR 9
  #define RADIUS_ACCT_TERMINATE_CAUSE_NAS_REQUEST 10
  #define RADIUS_ACCT_TERMINATE_CAUSE_NAS_REBOOT 11
  #define RADIUS_ACCT_TERMINATE_CAUSE_PORT_UNNEEDED 12
  #define RADIUS_ACCT_TERMINATE_CAUSE_PORT_PREEMPTED 13
  #define RADIUS_ACCT_TERMINATE_CAUSE_PORT_SUSPENDED 14
  #define RADIUS_ACCT_TERMINATE_CAUSE_SERVICE_UNAVAILABLE 15
  #define RADIUS_ACCT_TERMINATE_CAUSE_CALLBACK 16
  #define RADIUS_ACCT_TERMINATE_CAUSE_USER_ERROR 17
  #define RADIUS_ACCT_TERMINATE_CAUSE_HOST_REQUEST 18
  
  #define RADIUS_TUNNEL_TAGS 32
  
  /* Tunnel-Type */
  #define RADIUS_TUNNEL_TYPE_PPTP 1
  #define RADIUS_TUNNEL_TYPE_L2TP 3
  #define RADIUS_TUNNEL_TYPE_IPIP 7
  #define RADIUS_TUNNEL_TYPE_GRE 10
  #define RADIUS_TUNNEL_TYPE_VLAN 13
  
  /* Tunnel-Medium-Type */
  #define RADIUS_TUNNEL_MEDIUM_TYPE_IPV4 1
  #define RADIUS_TUNNEL_MEDIUM_TYPE_IPV6 2
  #define RADIUS_TUNNEL_MEDIUM_TYPE_802 6
  
  
  struct radius_attr_vendor {
  	u8 vendor_type;
  	u8 vendor_length;
  } STRUCT_PACKED;
  
  #define RADIUS_VENDOR_ID_CISCO 9
  #define RADIUS_CISCO_AV_PAIR 1
  
  /* RFC 2548 - Microsoft Vendor-specific RADIUS Attributes */
  #define RADIUS_VENDOR_ID_MICROSOFT 311
  
  enum { RADIUS_VENDOR_ATTR_MS_MPPE_SEND_KEY = 16,
         RADIUS_VENDOR_ATTR_MS_MPPE_RECV_KEY = 17
  };
  
  #ifdef _MSC_VER
  #pragma pack(pop)
  #endif /* _MSC_VER */
  
  struct radius_ms_mppe_keys {
  	u8 *send;
  	size_t send_len;
  	u8 *recv;
  	size_t recv_len;
  };
  
  
  struct radius_msg;
  
  /* Default size to be allocated for new RADIUS messages */
  #define RADIUS_DEFAULT_MSG_SIZE 1024
  
  /* Default size to be allocated for attribute array */
  #define RADIUS_DEFAULT_ATTR_COUNT 16
  
  
  /* MAC address ASCII format for IEEE 802.1X use
   * (draft-congdon-radius-8021x-20.txt) */
  #define RADIUS_802_1X_ADDR_FORMAT "%02X-%02X-%02X-%02X-%02X-%02X"
  /* MAC address ASCII format for non-802.1X use */
  #define RADIUS_ADDR_FORMAT "%02x%02x%02x%02x%02x%02x"
  
  struct radius_hdr * radius_msg_get_hdr(struct radius_msg *msg);
  struct wpabuf * radius_msg_get_buf(struct radius_msg *msg);
  struct radius_msg * radius_msg_new(u8 code, u8 identifier);
  void radius_msg_free(struct radius_msg *msg);
  void radius_msg_dump(struct radius_msg *msg);
  int radius_msg_finish(struct radius_msg *msg, const u8 *secret,
  		      size_t secret_len);
  int radius_msg_finish_srv(struct radius_msg *msg, const u8 *secret,
  			  size_t secret_len, const u8 *req_authenticator);
  void radius_msg_finish_acct(struct radius_msg *msg, const u8 *secret,
  			    size_t secret_len);
  struct radius_attr_hdr * radius_msg_add_attr(struct radius_msg *msg, u8 type,
  					     const u8 *data, size_t data_len);
  struct radius_msg * radius_msg_parse(const u8 *data, size_t len);
  int radius_msg_add_eap(struct radius_msg *msg, const u8 *data,
  		       size_t data_len);
  u8 *radius_msg_get_eap(struct radius_msg *msg, size_t *len);
  int radius_msg_verify(struct radius_msg *msg, const u8 *secret,
  		      size_t secret_len, struct radius_msg *sent_msg,
  		      int auth);
  int radius_msg_verify_msg_auth(struct radius_msg *msg, const u8 *secret,
  			       size_t secret_len, const u8 *req_auth);
  int radius_msg_copy_attr(struct radius_msg *dst, struct radius_msg *src,
  			 u8 type);
  void radius_msg_make_authenticator(struct radius_msg *msg,
  				   const u8 *data, size_t len);
  struct radius_ms_mppe_keys *
  radius_msg_get_ms_keys(struct radius_msg *msg, struct radius_msg *sent_msg,
  		       const u8 *secret, size_t secret_len);
  struct radius_ms_mppe_keys *
  radius_msg_get_cisco_keys(struct radius_msg *msg, struct radius_msg *sent_msg,
  			  const u8 *secret, size_t secret_len);
  int radius_msg_add_mppe_keys(struct radius_msg *msg,
  			     const u8 *req_authenticator,
  			     const u8 *secret, size_t secret_len,
  			     const u8 *send_key, size_t send_key_len,
  			     const u8 *recv_key, size_t recv_key_len);
  struct radius_attr_hdr *
  radius_msg_add_attr_user_password(struct radius_msg *msg,
  				  const u8 *data, size_t data_len,
  				  const u8 *secret, size_t secret_len);
  int radius_msg_get_attr(struct radius_msg *msg, u8 type, u8 *buf, size_t len);
  int radius_msg_get_vlanid(struct radius_msg *msg);
  
  static inline int radius_msg_add_attr_int32(struct radius_msg *msg, u8 type,
  					    u32 value)
  {
  	u32 val = htonl(value);
  	return radius_msg_add_attr(msg, type, (u8 *) &val, 4) != NULL;
  }
  
  static inline int radius_msg_get_attr_int32(struct radius_msg *msg, u8 type,
  					    u32 *value)
  {
  	u32 val;
  	int res;
  	res = radius_msg_get_attr(msg, type, (u8 *) &val, 4);
  	if (res != 4)
  		return -1;
  
  	*value = ntohl(val);
  	return 0;
  }
  int radius_msg_get_attr_ptr(struct radius_msg *msg, u8 type, u8 **buf,
  			    size_t *len, const u8 *start);
  int radius_msg_count_attr(struct radius_msg *msg, u8 type, int min_len);
  
  
  struct radius_attr_data {
  	u8 *data;
  	size_t len;
  };
  
  struct radius_class_data {
  	struct radius_attr_data *attr;
  	size_t count;
  };
  
  void radius_free_class(struct radius_class_data *c);
  int radius_copy_class(struct radius_class_data *dst,
  		      const struct radius_class_data *src);
  
  #endif /* RADIUS_H */
  