/*
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* EAP-TLS/PEAP/TTLS/FAST server common functions
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* Copyright (c) 2004-2009, Jouni Malinen <j@w1.fi>
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*
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* This software may be distributed under the terms of the BSD license.
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* See README for more details.
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*/
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#ifndef EAP_TLS_COMMON_H
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#define EAP_TLS_COMMON_H
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/**
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* struct eap_ssl_data - TLS data for EAP methods
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*/
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struct eap_ssl_data {
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/**
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* conn - TLS connection context data from tls_connection_init()
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*/
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struct tls_connection *conn;
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/**
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* tls_out - TLS message to be sent out in fragments
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*/
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struct wpabuf *tls_out;
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/**
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* tls_out_pos - The current position in the outgoing TLS message
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*/
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size_t tls_out_pos;
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/**
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* tls_out_limit - Maximum fragment size for outgoing TLS messages
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*/
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size_t tls_out_limit;
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/**
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* tls_in - Received TLS message buffer for re-assembly
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*/
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struct wpabuf *tls_in;
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/**
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* phase2 - Whether this TLS connection is used in EAP phase 2 (tunnel)
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*/
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int phase2;
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/**
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* eap - EAP state machine allocated with eap_server_sm_init()
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*/
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struct eap_sm *eap;
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enum { MSG, FRAG_ACK, WAIT_FRAG_ACK } state;
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struct wpabuf tmpbuf;
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/**
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* tls_v13 - Whether TLS v1.3 or newer is used
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*/
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int tls_v13;
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};
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/* EAP TLS Flags */
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#define EAP_TLS_FLAGS_LENGTH_INCLUDED 0x80
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#define EAP_TLS_FLAGS_MORE_FRAGMENTS 0x40
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#define EAP_TLS_FLAGS_START 0x20
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#define EAP_TLS_VERSION_MASK 0x07
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/* could be up to 128 bytes, but only the first 64 bytes are used */
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#define EAP_TLS_KEY_LEN 64
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/* dummy type used as a flag for UNAUTH-TLS */
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#define EAP_UNAUTH_TLS_TYPE 255
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#define EAP_WFA_UNAUTH_TLS_TYPE 254
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struct wpabuf * eap_tls_msg_alloc(EapType type, size_t payload_len,
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u8 code, u8 identifier);
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int eap_server_tls_ssl_init(struct eap_sm *sm, struct eap_ssl_data *data,
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int verify_peer, int eap_type);
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void eap_server_tls_ssl_deinit(struct eap_sm *sm, struct eap_ssl_data *data);
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u8 * eap_server_tls_derive_key(struct eap_sm *sm, struct eap_ssl_data *data,
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const char *label, const u8 *context,
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size_t context_len, size_t len);
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u8 * eap_server_tls_derive_session_id(struct eap_sm *sm,
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struct eap_ssl_data *data, u8 eap_type,
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size_t *len);
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struct wpabuf * eap_server_tls_build_msg(struct eap_ssl_data *data,
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int eap_type, int version, u8 id);
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struct wpabuf * eap_server_tls_build_ack(u8 id, int eap_type, int version);
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int eap_server_tls_phase1(struct eap_sm *sm, struct eap_ssl_data *data);
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struct wpabuf * eap_server_tls_encrypt(struct eap_sm *sm,
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struct eap_ssl_data *data,
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const struct wpabuf *plain);
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int eap_server_tls_process(struct eap_sm *sm, struct eap_ssl_data *data,
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struct wpabuf *respData, void *priv, int eap_type,
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int (*proc_version)(struct eap_sm *sm, void *priv,
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int peer_version),
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void (*proc_msg)(struct eap_sm *sm, void *priv,
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const struct wpabuf *respData));
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#endif /* EAP_TLS_COMMON_H */
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