1 /* 2 * EAP peer: EAP-TLS/PEAP/TTLS/FAST common functions 3 * Copyright (c) 2004-2009, Jouni Malinen <j (at) 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 * tls_in_left - Number of remaining bytes in the incoming TLS message 43 */ 44 size_t tls_in_left; 45 46 /** 47 * tls_in_total - Total number of bytes in the incoming TLS message 48 */ 49 size_t tls_in_total; 50 51 /** 52 * phase2 - Whether this TLS connection is used in EAP phase 2 (tunnel) 53 */ 54 int phase2; 55 56 /** 57 * include_tls_length - Whether the TLS length field is included even 58 * if the TLS data is not fragmented 59 */ 60 int include_tls_length; 61 62 /** 63 * eap - EAP state machine allocated with eap_peer_sm_init() 64 */ 65 struct eap_sm *eap; 66 }; 67 68 69 /* EAP TLS Flags */ 70 #define EAP_TLS_FLAGS_LENGTH_INCLUDED 0x80 71 #define EAP_TLS_FLAGS_MORE_FRAGMENTS 0x40 72 #define EAP_TLS_FLAGS_START 0x20 73 #define EAP_TLS_VERSION_MASK 0x07 74 75 /* could be up to 128 bytes, but only the first 64 bytes are used */ 76 #define EAP_TLS_KEY_LEN 64 77 78 79 int eap_peer_tls_ssl_init(struct eap_sm *sm, struct eap_ssl_data *data, 80 struct eap_peer_config *config); 81 void eap_peer_tls_ssl_deinit(struct eap_sm *sm, struct eap_ssl_data *data); 82 u8 * eap_peer_tls_derive_key(struct eap_sm *sm, struct eap_ssl_data *data, 83 const char *label, size_t len); 84 int eap_peer_tls_process_helper(struct eap_sm *sm, struct eap_ssl_data *data, 85 EapType eap_type, int peap_version, 86 u8 id, const u8 *in_data, size_t in_len, 87 struct wpabuf **out_data); 88 struct wpabuf * eap_peer_tls_build_ack(u8 id, EapType eap_type, 89 int peap_version); 90 int eap_peer_tls_reauth_init(struct eap_sm *sm, struct eap_ssl_data *data); 91 int eap_peer_tls_status(struct eap_sm *sm, struct eap_ssl_data *data, 92 char *buf, size_t buflen, int verbose); 93 const u8 * eap_peer_tls_process_init(struct eap_sm *sm, 94 struct eap_ssl_data *data, 95 EapType eap_type, 96 struct eap_method_ret *ret, 97 const struct wpabuf *reqData, 98 size_t *len, u8 *flags); 99 void eap_peer_tls_reset_input(struct eap_ssl_data *data); 100 void eap_peer_tls_reset_output(struct eap_ssl_data *data); 101 int eap_peer_tls_decrypt(struct eap_sm *sm, struct eap_ssl_data *data, 102 const struct wpabuf *in_data, 103 struct wpabuf **in_decrypted); 104 int eap_peer_tls_encrypt(struct eap_sm *sm, struct eap_ssl_data *data, 105 EapType eap_type, int peap_version, u8 id, 106 const struct wpabuf *in_data, 107 struct wpabuf **out_data); 108 int eap_peer_select_phase2_methods(struct eap_peer_config *config, 109 const char *prefix, 110 struct eap_method_type **types, 111 size_t *num_types); 112 int eap_peer_tls_phase2_nak(struct eap_method_type *types, size_t num_types, 113 struct eap_hdr *hdr, struct wpabuf **resp); 114 115 #endif /* EAP_TLS_COMMON_H */ 116
