text: /*
   * EAP server/peer: EAP-SAKE shared routines
   * Copyright (c) 2006-2019, Jouni Malinen <j@w1.fi>
   *
   * This software may be distributed under the terms of the BSD license.
   * See README for more details.
   */
  
  #ifndef EAP_SAKE_COMMON_H
  #define EAP_SAKE_COMMON_H
  
  #define EAP_SAKE_VERSION 2
  
  #define EAP_SAKE_SUBTYPE_CHALLENGE 1
  #define EAP_SAKE_SUBTYPE_CONFIRM 2
  #define EAP_SAKE_SUBTYPE_AUTH_REJECT 3
  #define EAP_SAKE_SUBTYPE_IDENTITY 4
  
  #define EAP_SAKE_AT_RAND_S 1
  #define EAP_SAKE_AT_RAND_P 2
  #define EAP_SAKE_AT_MIC_S 3
  #define EAP_SAKE_AT_MIC_P 4
  #define EAP_SAKE_AT_SERVERID 5
  #define EAP_SAKE_AT_PEERID 6
  #define EAP_SAKE_AT_SPI_S 7
  #define EAP_SAKE_AT_SPI_P 8
  #define EAP_SAKE_AT_ANY_ID_REQ 9
  #define EAP_SAKE_AT_PERM_ID_REQ 10
  #define EAP_SAKE_AT_ENCR_DATA 128
  #define EAP_SAKE_AT_IV 129
  #define EAP_SAKE_AT_PADDING 130
  #define EAP_SAKE_AT_NEXT_TMPID 131
  #define EAP_SAKE_AT_MSK_LIFE 132
  
  #define EAP_SAKE_RAND_LEN 16
  #define EAP_SAKE_MIC_LEN 16
  #define EAP_SAKE_ROOT_SECRET_LEN 16
  #define EAP_SAKE_SMS_LEN 16
  #define EAP_SAKE_TEK_AUTH_LEN 16
  #define EAP_SAKE_TEK_CIPHER_LEN 16
  #define EAP_SAKE_TEK_LEN (EAP_SAKE_TEK_AUTH_LEN + EAP_SAKE_TEK_CIPHER_LEN)
  
  #ifdef _MSC_VER
  #pragma pack(push, 1)
  #endif /* _MSC_VER */
  
  struct eap_sake_hdr {
  	u8 version; /* EAP_SAKE_VERSION */
  	u8 session_id;
  	u8 subtype;
  } STRUCT_PACKED;
  
  #ifdef _MSC_VER
  #pragma pack(pop)
  #endif /* _MSC_VER */
  
  
  struct eap_sake_parse_attr {
  	const u8 *rand_s;
  	const u8 *rand_p;
  	const u8 *mic_s;
  	const u8 *mic_p;
  	const u8 *serverid;
  	size_t serverid_len;
  	const u8 *peerid;
  	size_t peerid_len;
  	const u8 *spi_s;
  	size_t spi_s_len;
  	const u8 *spi_p;
  	size_t spi_p_len;
  	const u8 *any_id_req;
  	const u8 *perm_id_req;
  	const u8 *encr_data;
  	size_t encr_data_len;
  	const u8 *iv;
  	size_t iv_len;
  	const u8 *next_tmpid;
  	size_t next_tmpid_len;
  	const u8 *msk_life;
  };
  
  int eap_sake_parse_attributes(const u8 *buf, size_t len,
  			      struct eap_sake_parse_attr *attr);
  int eap_sake_derive_keys(const u8 *root_secret_a, const u8 *root_secret_b,
  			 const u8 *rand_s, const u8 *rand_p,
  			 u8 *tek, u8 *msk, u8 *emsk);
  int eap_sake_compute_mic(const u8 *tek_auth,
  			 const u8 *rand_s, const u8 *rand_p,
  			 const u8 *serverid, size_t serverid_len,
  			 const u8 *peerid, size_t peerid_len,
  			 int peer, const u8 *eap, size_t eap_len,
  			 const u8 *mic_pos, u8 *mic);
  void eap_sake_add_attr(struct wpabuf *buf, u8 type, const u8 *data,
  		       size_t len);
  
  #endif /* EAP_SAKE_COMMON_H */
  