18d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt/* 28d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * EAP peer: EAP-TLS/PEAP/TTLS/FAST common functions 304949598a23f501be6eec21697465fd46a28840aDmitry Shmidt * Copyright (c) 2004-2009, 2012, Jouni Malinen <j@w1.fi> 48d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * 5c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt * This software may be distributed under the terms of the BSD license. 6c5ec7f57ead87efa365800228aa0b09a12d9e6c4Dmitry Shmidt * See README for more details. 78d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt */ 88d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 98d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#ifndef EAP_TLS_COMMON_H 108d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#define EAP_TLS_COMMON_H 118d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 128d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt/** 138d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * struct eap_ssl_data - TLS data for EAP methods 148d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt */ 158d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidtstruct eap_ssl_data { 168d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt /** 178d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * conn - TLS connection context data from tls_connection_init() 188d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt */ 198d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt struct tls_connection *conn; 208d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 218d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt /** 228d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * tls_out - TLS message to be sent out in fragments 238d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt */ 248d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt struct wpabuf *tls_out; 258d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 268d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt /** 278d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * tls_out_pos - The current position in the outgoing TLS message 288d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt */ 298d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt size_t tls_out_pos; 308d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 318d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt /** 328d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * tls_out_limit - Maximum fragment size for outgoing TLS messages 338d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt */ 348d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt size_t tls_out_limit; 358d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 368d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt /** 378d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * tls_in - Received TLS message buffer for re-assembly 388d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt */ 398d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt struct wpabuf *tls_in; 408d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 418d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt /** 428d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * tls_in_left - Number of remaining bytes in the incoming TLS message 438d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt */ 448d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt size_t tls_in_left; 458d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 468d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt /** 478d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * tls_in_total - Total number of bytes in the incoming TLS message 488d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt */ 498d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt size_t tls_in_total; 508d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 518d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt /** 528d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * phase2 - Whether this TLS connection is used in EAP phase 2 (tunnel) 538d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt */ 548d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt int phase2; 558d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 568d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt /** 578d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * include_tls_length - Whether the TLS length field is included even 588d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * if the TLS data is not fragmented 598d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt */ 608d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt int include_tls_length; 618d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 628d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt /** 638d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt * eap - EAP state machine allocated with eap_peer_sm_init() 648d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt */ 658d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt struct eap_sm *eap; 6604949598a23f501be6eec21697465fd46a28840aDmitry Shmidt 6704949598a23f501be6eec21697465fd46a28840aDmitry Shmidt /** 6804949598a23f501be6eec21697465fd46a28840aDmitry Shmidt * ssl_ctx - TLS library context to use for the connection 6904949598a23f501be6eec21697465fd46a28840aDmitry Shmidt */ 7004949598a23f501be6eec21697465fd46a28840aDmitry Shmidt void *ssl_ctx; 7161d9df3e62aaa0e87ad05452fcb95142159a17b6Dmitry Shmidt 7261d9df3e62aaa0e87ad05452fcb95142159a17b6Dmitry Shmidt /** 7361d9df3e62aaa0e87ad05452fcb95142159a17b6Dmitry Shmidt * eap_type - EAP method used in Phase 1 (EAP_TYPE_TLS/PEAP/TTLS/FAST) 7461d9df3e62aaa0e87ad05452fcb95142159a17b6Dmitry Shmidt */ 7561d9df3e62aaa0e87ad05452fcb95142159a17b6Dmitry Shmidt u8 eap_type; 768d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt}; 778d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 788d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 798d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt/* EAP TLS Flags */ 808d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#define EAP_TLS_FLAGS_LENGTH_INCLUDED 0x80 818d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#define EAP_TLS_FLAGS_MORE_FRAGMENTS 0x40 828d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#define EAP_TLS_FLAGS_START 0x20 838d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#define EAP_TLS_VERSION_MASK 0x07 848d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 858d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt /* could be up to 128 bytes, but only the first 64 bytes are used */ 868d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#define EAP_TLS_KEY_LEN 64 878d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 8861d9df3e62aaa0e87ad05452fcb95142159a17b6Dmitry Shmidt/* dummy type used as a flag for UNAUTH-TLS */ 8961d9df3e62aaa0e87ad05452fcb95142159a17b6Dmitry Shmidt#define EAP_UNAUTH_TLS_TYPE 255 9061d9df3e62aaa0e87ad05452fcb95142159a17b6Dmitry Shmidt 918d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 928d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidtint eap_peer_tls_ssl_init(struct eap_sm *sm, struct eap_ssl_data *data, 9361d9df3e62aaa0e87ad05452fcb95142159a17b6Dmitry Shmidt struct eap_peer_config *config, u8 eap_type); 948d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidtvoid eap_peer_tls_ssl_deinit(struct eap_sm *sm, struct eap_ssl_data *data); 958d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidtu8 * eap_peer_tls_derive_key(struct eap_sm *sm, struct eap_ssl_data *data, 968d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt const char *label, size_t len); 97f86232838cf712377867cb42417c1613ab5dc425Dmitry Shmidtu8 * eap_peer_tls_derive_session_id(struct eap_sm *sm, 98f86232838cf712377867cb42417c1613ab5dc425Dmitry Shmidt struct eap_ssl_data *data, u8 eap_type, 99f86232838cf712377867cb42417c1613ab5dc425Dmitry Shmidt size_t *len); 1008d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidtint eap_peer_tls_process_helper(struct eap_sm *sm, struct eap_ssl_data *data, 1018d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt EapType eap_type, int peap_version, 1028d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt u8 id, const u8 *in_data, size_t in_len, 1038d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt struct wpabuf **out_data); 1048d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidtstruct wpabuf * eap_peer_tls_build_ack(u8 id, EapType eap_type, 1058d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt int peap_version); 1068d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidtint eap_peer_tls_reauth_init(struct eap_sm *sm, struct eap_ssl_data *data); 1078d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidtint eap_peer_tls_status(struct eap_sm *sm, struct eap_ssl_data *data, 1088d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt char *buf, size_t buflen, int verbose); 1098d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidtconst u8 * eap_peer_tls_process_init(struct eap_sm *sm, 1108d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt struct eap_ssl_data *data, 1118d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt EapType eap_type, 1128d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt struct eap_method_ret *ret, 1138d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt const struct wpabuf *reqData, 1148d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt size_t *len, u8 *flags); 1158d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidtvoid eap_peer_tls_reset_input(struct eap_ssl_data *data); 1168d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidtvoid eap_peer_tls_reset_output(struct eap_ssl_data *data); 1178d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidtint eap_peer_tls_decrypt(struct eap_sm *sm, struct eap_ssl_data *data, 1188d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt const struct wpabuf *in_data, 1198d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt struct wpabuf **in_decrypted); 1208d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidtint eap_peer_tls_encrypt(struct eap_sm *sm, struct eap_ssl_data *data, 1218d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt EapType eap_type, int peap_version, u8 id, 1228d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt const struct wpabuf *in_data, 1238d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt struct wpabuf **out_data); 1248d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidtint eap_peer_select_phase2_methods(struct eap_peer_config *config, 1258d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt const char *prefix, 1268d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt struct eap_method_type **types, 1278d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt size_t *num_types); 1288d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidtint eap_peer_tls_phase2_nak(struct eap_method_type *types, size_t num_types, 1298d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt struct eap_hdr *hdr, struct wpabuf **resp); 1308d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt 1318d520ff1dc2da35cdca849e982051b86468016d8Dmitry Shmidt#endif /* EAP_TLS_COMMON_H */ 132