1 /* 2 * EAP-TLS/PEAP/TTLS/FAST server common functions 3 * Copyright (c) 2004-2009, 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 EAP_TLS_COMMON_H 10 #define EAP_TLS_COMMON_H 11 12 /** 13 * struct eap_ssl_data - TLS data for EAP methods 14 */ 15 struct eap_ssl_data { 16 /** 17 * conn - TLS connection context data from tls_connection_init() 18 */ 19 struct tls_connection *conn; 20 21 /** 22 * tls_out - TLS message to be sent out in fragments 23 */ 24 struct wpabuf *tls_out; 25 26 /** 27 * tls_out_pos - The current position in the outgoing TLS message 28 */ 29 size_t tls_out_pos; 30 31 /** 32 * tls_out_limit - Maximum fragment size for outgoing TLS messages 33 */ 34 size_t tls_out_limit; 35 36 /** 37 * tls_in - Received TLS message buffer for re-assembly 38 */ 39 struct wpabuf *tls_in; 40 41 /** 42 * phase2 - Whether this TLS connection is used in EAP phase 2 (tunnel) 43 */ 44 int phase2; 45 46 /** 47 * eap - EAP state machine allocated with eap_server_sm_init() 48 */ 49 struct eap_sm *eap; 50 51 enum { MSG, FRAG_ACK, WAIT_FRAG_ACK } state; 52 struct wpabuf tmpbuf; 53 }; 54 55 56 /* EAP TLS Flags */ 57 #define EAP_TLS_FLAGS_LENGTH_INCLUDED 0x80 58 #define EAP_TLS_FLAGS_MORE_FRAGMENTS 0x40 59 #define EAP_TLS_FLAGS_START 0x20 60 #define EAP_TLS_VERSION_MASK 0x07 61 62 /* could be up to 128 bytes, but only the first 64 bytes are used */ 63 #define EAP_TLS_KEY_LEN 64 64 65 /* dummy type used as a flag for UNAUTH-TLS */ 66 #define EAP_UNAUTH_TLS_TYPE 255 67 68 69 struct wpabuf * eap_tls_msg_alloc(EapType type, size_t payload_len, 70 u8 code, u8 identifier); 71 int eap_server_tls_ssl_init(struct eap_sm *sm, struct eap_ssl_data *data, 72 int verify_peer); 73 void eap_server_tls_ssl_deinit(struct eap_sm *sm, struct eap_ssl_data *data); 74 u8 * eap_server_tls_derive_key(struct eap_sm *sm, struct eap_ssl_data *data, 75 char *label, size_t len); 76 struct wpabuf * eap_server_tls_build_msg(struct eap_ssl_data *data, 77 int eap_type, int version, u8 id); 78 struct wpabuf * eap_server_tls_build_ack(u8 id, int eap_type, int version); 79 int eap_server_tls_phase1(struct eap_sm *sm, struct eap_ssl_data *data); 80 struct wpabuf * eap_server_tls_encrypt(struct eap_sm *sm, 81 struct eap_ssl_data *data, 82 const struct wpabuf *plain); 83 int eap_server_tls_process(struct eap_sm *sm, struct eap_ssl_data *data, 84 struct wpabuf *respData, void *priv, int eap_type, 85 int (*proc_version)(struct eap_sm *sm, void *priv, 86 int peer_version), 87 void (*proc_msg)(struct eap_sm *sm, void *priv, 88 const struct wpabuf *respData)); 89 90 #endif /* EAP_TLS_COMMON_H */ 91