eap_tls_common.h revision 281806
1189251Ssam/* 2189251Ssam * EAP peer: EAP-TLS/PEAP/TTLS/FAST common functions 3252726Srpaulo * Copyright (c) 2004-2009, 2012, Jouni Malinen <j@w1.fi> 4189251Ssam * 5252726Srpaulo * This software may be distributed under the terms of the BSD license. 6252726Srpaulo * See README for more details. 7189251Ssam */ 8189251Ssam 9189251Ssam#ifndef EAP_TLS_COMMON_H 10189251Ssam#define EAP_TLS_COMMON_H 11189251Ssam 12189251Ssam/** 13189251Ssam * struct eap_ssl_data - TLS data for EAP methods 14189251Ssam */ 15189251Ssamstruct eap_ssl_data { 16189251Ssam /** 17189251Ssam * conn - TLS connection context data from tls_connection_init() 18189251Ssam */ 19189251Ssam struct tls_connection *conn; 20189251Ssam 21189251Ssam /** 22189251Ssam * tls_out - TLS message to be sent out in fragments 23189251Ssam */ 24214734Srpaulo struct wpabuf *tls_out; 25189251Ssam 26189251Ssam /** 27189251Ssam * tls_out_pos - The current position in the outgoing TLS message 28189251Ssam */ 29189251Ssam size_t tls_out_pos; 30189251Ssam 31189251Ssam /** 32189251Ssam * tls_out_limit - Maximum fragment size for outgoing TLS messages 33189251Ssam */ 34189251Ssam size_t tls_out_limit; 35189251Ssam 36189251Ssam /** 37189251Ssam * tls_in - Received TLS message buffer for re-assembly 38189251Ssam */ 39214734Srpaulo struct wpabuf *tls_in; 40189251Ssam 41189251Ssam /** 42189251Ssam * tls_in_left - Number of remaining bytes in the incoming TLS message 43189251Ssam */ 44189251Ssam size_t tls_in_left; 45189251Ssam 46189251Ssam /** 47189251Ssam * tls_in_total - Total number of bytes in the incoming TLS message 48189251Ssam */ 49189251Ssam size_t tls_in_total; 50189251Ssam 51189251Ssam /** 52189251Ssam * phase2 - Whether this TLS connection is used in EAP phase 2 (tunnel) 53189251Ssam */ 54189251Ssam int phase2; 55189251Ssam 56189251Ssam /** 57189251Ssam * include_tls_length - Whether the TLS length field is included even 58189251Ssam * if the TLS data is not fragmented 59189251Ssam */ 60189251Ssam int include_tls_length; 61189251Ssam 62189251Ssam /** 63252726Srpaulo * eap - EAP state machine allocated with eap_peer_sm_init() 64189251Ssam */ 65252726Srpaulo struct eap_sm *eap; 66189251Ssam 67189251Ssam /** 68252726Srpaulo * ssl_ctx - TLS library context to use for the connection 69189251Ssam */ 70252726Srpaulo void *ssl_ctx; 71252726Srpaulo 72252726Srpaulo /** 73252726Srpaulo * eap_type - EAP method used in Phase 1 (EAP_TYPE_TLS/PEAP/TTLS/FAST) 74252726Srpaulo */ 75252726Srpaulo u8 eap_type; 76189251Ssam}; 77189251Ssam 78189251Ssam 79189251Ssam/* EAP TLS Flags */ 80189251Ssam#define EAP_TLS_FLAGS_LENGTH_INCLUDED 0x80 81189251Ssam#define EAP_TLS_FLAGS_MORE_FRAGMENTS 0x40 82189251Ssam#define EAP_TLS_FLAGS_START 0x20 83214734Srpaulo#define EAP_TLS_VERSION_MASK 0x07 84189251Ssam 85189251Ssam /* could be up to 128 bytes, but only the first 64 bytes are used */ 86189251Ssam#define EAP_TLS_KEY_LEN 64 87189251Ssam 88252726Srpaulo/* dummy type used as a flag for UNAUTH-TLS */ 89252726Srpaulo#define EAP_UNAUTH_TLS_TYPE 255 90281806Srpaulo#define EAP_WFA_UNAUTH_TLS_TYPE 254 91189251Ssam 92252726Srpaulo 93189251Ssamint eap_peer_tls_ssl_init(struct eap_sm *sm, struct eap_ssl_data *data, 94252726Srpaulo struct eap_peer_config *config, u8 eap_type); 95189251Ssamvoid eap_peer_tls_ssl_deinit(struct eap_sm *sm, struct eap_ssl_data *data); 96189251Ssamu8 * eap_peer_tls_derive_key(struct eap_sm *sm, struct eap_ssl_data *data, 97189251Ssam const char *label, size_t len); 98281806Srpaulou8 * eap_peer_tls_derive_session_id(struct eap_sm *sm, 99281806Srpaulo struct eap_ssl_data *data, u8 eap_type, 100281806Srpaulo size_t *len); 101189251Ssamint eap_peer_tls_process_helper(struct eap_sm *sm, struct eap_ssl_data *data, 102189251Ssam EapType eap_type, int peap_version, 103189251Ssam u8 id, const u8 *in_data, size_t in_len, 104189251Ssam struct wpabuf **out_data); 105189251Ssamstruct wpabuf * eap_peer_tls_build_ack(u8 id, EapType eap_type, 106189251Ssam int peap_version); 107189251Ssamint eap_peer_tls_reauth_init(struct eap_sm *sm, struct eap_ssl_data *data); 108189251Ssamint eap_peer_tls_status(struct eap_sm *sm, struct eap_ssl_data *data, 109189251Ssam char *buf, size_t buflen, int verbose); 110189251Ssamconst u8 * eap_peer_tls_process_init(struct eap_sm *sm, 111189251Ssam struct eap_ssl_data *data, 112189251Ssam EapType eap_type, 113189251Ssam struct eap_method_ret *ret, 114189251Ssam const struct wpabuf *reqData, 115189251Ssam size_t *len, u8 *flags); 116189251Ssamvoid eap_peer_tls_reset_input(struct eap_ssl_data *data); 117189251Ssamvoid eap_peer_tls_reset_output(struct eap_ssl_data *data); 118189251Ssamint eap_peer_tls_decrypt(struct eap_sm *sm, struct eap_ssl_data *data, 119189251Ssam const struct wpabuf *in_data, 120189251Ssam struct wpabuf **in_decrypted); 121189251Ssamint eap_peer_tls_encrypt(struct eap_sm *sm, struct eap_ssl_data *data, 122189251Ssam EapType eap_type, int peap_version, u8 id, 123189251Ssam const struct wpabuf *in_data, 124189251Ssam struct wpabuf **out_data); 125189251Ssamint eap_peer_select_phase2_methods(struct eap_peer_config *config, 126189251Ssam const char *prefix, 127189251Ssam struct eap_method_type **types, 128189251Ssam size_t *num_types); 129189251Ssamint eap_peer_tls_phase2_nak(struct eap_method_type *types, size_t num_types, 130189251Ssam struct eap_hdr *hdr, struct wpabuf **resp); 131189251Ssam 132189251Ssam#endif /* EAP_TLS_COMMON_H */ 133