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140 lines
4.0 KiB
C
140 lines
4.0 KiB
C
/*
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* EAP peer: EAP-TLS/PEAP/TTLS/FAST common functions
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* Copyright (c) 2004-2006, Jouni Malinen <j@w1.fi>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* Alternatively, this software may be distributed under the terms of BSD
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* license.
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*
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* See README and COPYING 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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u8 *tls_out;
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/**
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* tls_out_len - Total length of the outgoing TLS message
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*/
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size_t tls_out_len;
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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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u8 *tls_in;
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/**
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* tls_in_len - Number of bytes of the received TLS message in tls_in
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*/
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size_t tls_in_len;
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/**
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* tls_in_left - Number of remaining bytes in the incoming TLS message
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*/
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size_t tls_in_left;
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/**
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* tls_in_total - Total number of bytes in the incoming TLS message
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*/
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size_t tls_in_total;
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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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* include_tls_length - Whether the TLS length field is included even
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* if the TLS data is not fragmented
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*/
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int include_tls_length;
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/**
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* tls_ia - Whether TLS/IA is enabled for this TLS connection
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*/
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int tls_ia;
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/**
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* eap - Pointer to EAP state machine allocated with eap_peer_sm_init()
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*/
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struct eap_sm *eap;
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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_PEAP_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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int eap_peer_tls_ssl_init(struct eap_sm *sm, struct eap_ssl_data *data,
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struct eap_peer_config *config);
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void eap_peer_tls_ssl_deinit(struct eap_sm *sm, struct eap_ssl_data *data);
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u8 * eap_peer_tls_derive_key(struct eap_sm *sm, struct eap_ssl_data *data,
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const char *label, size_t len);
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const u8 * eap_peer_tls_data_reassemble(
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struct eap_ssl_data *data, const u8 *in_data, size_t in_len,
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size_t *out_len, int *need_more_input);
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int eap_peer_tls_process_helper(struct eap_sm *sm, struct eap_ssl_data *data,
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EapType eap_type, int peap_version,
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u8 id, const u8 *in_data, size_t in_len,
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struct wpabuf **out_data);
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struct wpabuf * eap_peer_tls_build_ack(u8 id, EapType eap_type,
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int peap_version);
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int eap_peer_tls_reauth_init(struct eap_sm *sm, struct eap_ssl_data *data);
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int eap_peer_tls_status(struct eap_sm *sm, struct eap_ssl_data *data,
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char *buf, size_t buflen, int verbose);
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const u8 * eap_peer_tls_process_init(struct eap_sm *sm,
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struct eap_ssl_data *data,
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EapType eap_type,
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struct eap_method_ret *ret,
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const struct wpabuf *reqData,
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size_t *len, u8 *flags);
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void eap_peer_tls_reset_input(struct eap_ssl_data *data);
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void eap_peer_tls_reset_output(struct eap_ssl_data *data);
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int eap_peer_tls_decrypt(struct eap_sm *sm, struct eap_ssl_data *data,
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const struct wpabuf *in_data,
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struct wpabuf **in_decrypted);
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int eap_peer_tls_encrypt(struct eap_sm *sm, struct eap_ssl_data *data,
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EapType eap_type, int peap_version, u8 id,
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const struct wpabuf *in_data,
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struct wpabuf **out_data);
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int eap_peer_select_phase2_methods(struct eap_peer_config *config,
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const char *prefix,
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struct eap_method_type **types,
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size_t *num_types);
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int eap_peer_tls_phase2_nak(struct eap_method_type *types, size_t num_types,
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struct eap_hdr *hdr, struct wpabuf **resp);
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#endif /* EAP_TLS_COMMON_H */
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