1 /* 2 * EAP-FAST definitions (RFC 4851) 3 * Copyright (c) 2004-2008, Jouni Malinen <j@w1.fi> 4 * 5 * This software may be distributed under the terms of the BSD license. 6 * See README for more details. 7 */ 8 9 #ifndef EAP_FAST_H 10 #define EAP_FAST_H 11 12 #define EAP_FAST_VERSION 1 13 #define EAP_FAST_KEY_LEN 64 14 #define EAP_FAST_SIMCK_LEN 40 15 #define EAP_FAST_SKS_LEN 40 16 #define EAP_FAST_CMK_LEN 20 17 18 #define TLS_EXT_PAC_OPAQUE 35 19 20 /* 21 * RFC 5422: Section 4.2.1 - Formats for PAC TLV Attributes / Type Field 22 * Note: bit 0x8000 (Mandatory) and bit 0x4000 (Reserved) are also defined 23 * in the general PAC TLV format (Section 4.2). 24 */ 25 #define PAC_TYPE_PAC_KEY 1 26 #define PAC_TYPE_PAC_OPAQUE 2 27 #define PAC_TYPE_CRED_LIFETIME 3 28 #define PAC_TYPE_A_ID 4 29 #define PAC_TYPE_I_ID 5 30 /* 31 * 6 was previous assigned for SERVER_PROTECTED_DATA, but 32 * draft-cam-winget-eap-fast-provisioning-02.txt changed this to Reserved. 33 */ 34 #define PAC_TYPE_A_ID_INFO 7 35 #define PAC_TYPE_PAC_ACKNOWLEDGEMENT 8 36 #define PAC_TYPE_PAC_INFO 9 37 #define PAC_TYPE_PAC_TYPE 10 38 39 #ifdef _MSC_VER 40 #pragma pack(push, 1) 41 #endif /* _MSC_VER */ 42 43 struct pac_tlv_hdr { 44 be16 type; 45 be16 len; 46 } STRUCT_PACKED; 47 48 #ifdef _MSC_VER 49 #pragma pack(pop) 50 #endif /* _MSC_VER */ 51 52 53 #define EAP_FAST_PAC_KEY_LEN 32 54 55 /* RFC 5422: 4.2.6 PAC-Type TLV */ 56 #define PAC_TYPE_TUNNEL_PAC 1 57 /* Application Specific Short Lived PACs (only in volatile storage) */ 58 /* User Authorization PAC */ 59 #define PAC_TYPE_USER_AUTHORIZATION 3 60 /* Application Specific Long Lived PACs */ 61 /* Machine Authentication PAC */ 62 #define PAC_TYPE_MACHINE_AUTHENTICATION 2 63 64 65 /* 66 * RFC 5422: 67 * Section 3.3 - Key Derivations Used in the EAP-FAST Provisioning Exchange 68 */ 69 struct eap_fast_key_block_provisioning { 70 /* Extra key material after TLS key_block */ 71 u8 session_key_seed[EAP_FAST_SKS_LEN]; 72 u8 server_challenge[16]; /* MSCHAPv2 ServerChallenge */ 73 u8 client_challenge[16]; /* MSCHAPv2 ClientChallenge */ 74 }; 75 76 77 struct wpabuf; 78 struct tls_connection; 79 80 struct eap_fast_tlv_parse { 81 u8 *eap_payload_tlv; 82 size_t eap_payload_tlv_len; 83 struct eap_tlv_crypto_binding_tlv *crypto_binding; 84 size_t crypto_binding_len; 85 int iresult; 86 int result; 87 int request_action; 88 u8 *pac; 89 size_t pac_len; 90 }; 91 92 void eap_fast_put_tlv_hdr(struct wpabuf *buf, u16 type, u16 len); 93 void eap_fast_put_tlv(struct wpabuf *buf, u16 type, const void *data, 94 u16 len); 95 void eap_fast_put_tlv_buf(struct wpabuf *buf, u16 type, 96 const struct wpabuf *data); 97 struct wpabuf * eap_fast_tlv_eap_payload(struct wpabuf *buf); 98 void eap_fast_derive_master_secret(const u8 *pac_key, const u8 *server_random, 99 const u8 *client_random, u8 *master_secret); 100 u8 * eap_fast_derive_key(void *ssl_ctx, struct tls_connection *conn, 101 const char *label, size_t len); 102 void eap_fast_derive_eap_msk(const u8 *simck, u8 *msk); 103 void eap_fast_derive_eap_emsk(const u8 *simck, u8 *emsk); 104 int eap_fast_parse_tlv(struct eap_fast_tlv_parse *tlv, 105 int tlv_type, u8 *pos, int len); 106 107 #endif /* EAP_FAST_H */ 108