eap_tls_common.h revision 04949598a23f501be6eec21697465fd46a28840a
1/* 2 * EAP peer: EAP-TLS/PEAP/TTLS/FAST common functions 3 * Copyright (c) 2004-2009, 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 EAP_TLS_COMMON_H 10#define EAP_TLS_COMMON_H 11 12/** 13 * struct eap_ssl_data - TLS data for EAP methods 14 */ 15struct 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 * ssl_ctx - TLS library context to use for the connection 69 */ 70 void *ssl_ctx; 71}; 72 73 74/* EAP TLS Flags */ 75#define EAP_TLS_FLAGS_LENGTH_INCLUDED 0x80 76#define EAP_TLS_FLAGS_MORE_FRAGMENTS 0x40 77#define EAP_TLS_FLAGS_START 0x20 78#define EAP_TLS_VERSION_MASK 0x07 79 80 /* could be up to 128 bytes, but only the first 64 bytes are used */ 81#define EAP_TLS_KEY_LEN 64 82 83 84int eap_peer_tls_ssl_init(struct eap_sm *sm, struct eap_ssl_data *data, 85 struct eap_peer_config *config); 86void eap_peer_tls_ssl_deinit(struct eap_sm *sm, struct eap_ssl_data *data); 87u8 * eap_peer_tls_derive_key(struct eap_sm *sm, struct eap_ssl_data *data, 88 const char *label, size_t len); 89int eap_peer_tls_process_helper(struct eap_sm *sm, struct eap_ssl_data *data, 90 EapType eap_type, int peap_version, 91 u8 id, const u8 *in_data, size_t in_len, 92 struct wpabuf **out_data); 93struct wpabuf * eap_peer_tls_build_ack(u8 id, EapType eap_type, 94 int peap_version); 95int eap_peer_tls_reauth_init(struct eap_sm *sm, struct eap_ssl_data *data); 96int eap_peer_tls_status(struct eap_sm *sm, struct eap_ssl_data *data, 97 char *buf, size_t buflen, int verbose); 98const u8 * eap_peer_tls_process_init(struct eap_sm *sm, 99 struct eap_ssl_data *data, 100 EapType eap_type, 101 struct eap_method_ret *ret, 102 const struct wpabuf *reqData, 103 size_t *len, u8 *flags); 104void eap_peer_tls_reset_input(struct eap_ssl_data *data); 105void eap_peer_tls_reset_output(struct eap_ssl_data *data); 106int eap_peer_tls_decrypt(struct eap_sm *sm, struct eap_ssl_data *data, 107 const struct wpabuf *in_data, 108 struct wpabuf **in_decrypted); 109int eap_peer_tls_encrypt(struct eap_sm *sm, struct eap_ssl_data *data, 110 EapType eap_type, int peap_version, u8 id, 111 const struct wpabuf *in_data, 112 struct wpabuf **out_data); 113int eap_peer_select_phase2_methods(struct eap_peer_config *config, 114 const char *prefix, 115 struct eap_method_type **types, 116 size_t *num_types); 117int eap_peer_tls_phase2_nak(struct eap_method_type *types, size_t num_types, 118 struct eap_hdr *hdr, struct wpabuf **resp); 119 120#endif /* EAP_TLS_COMMON_H */ 121