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* EAP peer: EAP-TLS/PEAP/TTLS/FAST common functions
* Copyright (c) 2004-2009, 2012, Jouni Malinen <>
* This software may be distributed under the terms of the BSD license.
* See README for more details.
* struct eap_ssl_data - TLS data for EAP methods
struct eap_ssl_data {
* conn - TLS connection context data from tls_connection_init()
struct tls_connection *conn;
* tls_out - TLS message to be sent out in fragments
struct wpabuf *tls_out;
* tls_out_pos - The current position in the outgoing TLS message
size_t tls_out_pos;
* tls_out_limit - Maximum fragment size for outgoing TLS messages
size_t tls_out_limit;
* tls_in - Received TLS message buffer for re-assembly
struct wpabuf *tls_in;
* tls_in_left - Number of remaining bytes in the incoming TLS message
size_t tls_in_left;
* tls_in_total - Total number of bytes in the incoming TLS message
size_t tls_in_total;
* phase2 - Whether this TLS connection is used in EAP phase 2 (tunnel)
int phase2;
* include_tls_length - Whether the TLS length field is included even
* if the TLS data is not fragmented
int include_tls_length;
* eap - EAP state machine allocated with eap_peer_sm_init()
struct eap_sm *eap;
* ssl_ctx - TLS library context to use for the connection
void *ssl_ctx;
* eap_type - EAP method used in Phase 1 (EAP_TYPE_TLS/PEAP/TTLS/FAST)
u8 eap_type;
/* EAP TLS Flags */
#define EAP_TLS_FLAGS_START 0x20
/* could be up to 128 bytes, but only the first 64 bytes are used */
#define EAP_TLS_KEY_LEN 64
/* dummy type used as a flag for UNAUTH-TLS */
int eap_peer_tls_ssl_init(struct eap_sm *sm, struct eap_ssl_data *data,
struct eap_peer_config *config, u8 eap_type);
void eap_peer_tls_ssl_deinit(struct eap_sm *sm, struct eap_ssl_data *data);
u8 * eap_peer_tls_derive_key(struct eap_sm *sm, struct eap_ssl_data *data,
const char *label, size_t len);
int eap_peer_tls_process_helper(struct eap_sm *sm, struct eap_ssl_data *data,
EapType eap_type, int peap_version,
u8 id, const u8 *in_data, size_t in_len,
struct wpabuf **out_data);
struct wpabuf * eap_peer_tls_build_ack(u8 id, EapType eap_type,
int peap_version);
int eap_peer_tls_reauth_init(struct eap_sm *sm, struct eap_ssl_data *data);
int eap_peer_tls_status(struct eap_sm *sm, struct eap_ssl_data *data,
char *buf, size_t buflen, int verbose);
const u8 * eap_peer_tls_process_init(struct eap_sm *sm,
struct eap_ssl_data *data,
EapType eap_type,
struct eap_method_ret *ret,
const struct wpabuf *reqData,
size_t *len, u8 *flags);
void eap_peer_tls_reset_input(struct eap_ssl_data *data);
void eap_peer_tls_reset_output(struct eap_ssl_data *data);
int eap_peer_tls_decrypt(struct eap_sm *sm, struct eap_ssl_data *data,
const struct wpabuf *in_data,
struct wpabuf **in_decrypted);
int eap_peer_tls_encrypt(struct eap_sm *sm, struct eap_ssl_data *data,
EapType eap_type, int peap_version, u8 id,
const struct wpabuf *in_data,
struct wpabuf **out_data);
int eap_peer_select_phase2_methods(struct eap_peer_config *config,
const char *prefix,
struct eap_method_type **types,
size_t *num_types);
int eap_peer_tls_phase2_nak(struct eap_method_type *types, size_t num_types,
struct eap_hdr *hdr, struct wpabuf **resp);
#endif /* EAP_TLS_COMMON_H */