1 /* 2 * EAP-FAST definitions (RFC 4851) 3 * Copyright (c) 2004-2008, Jouni Malinen <j (at) w1.fi> 4 * 5 * This program is free software; you can redistribute it and/or modify 6 * it under the terms of the GNU General Public License version 2 as 7 * published by the Free Software Foundation. 8 * 9 * Alternatively, this software may be distributed under the terms of BSD 10 * license. 11 * 12 * See README and COPYING for more details. 13 */ 14 15 #ifndef EAP_FAST_H 16 #define EAP_FAST_H 17 18 #define EAP_FAST_VERSION 1 19 #define EAP_FAST_KEY_LEN 64 20 #define EAP_FAST_SIMCK_LEN 40 21 #define EAP_FAST_SKS_LEN 40 22 #define EAP_FAST_CMK_LEN 20 23 24 #define TLS_EXT_PAC_OPAQUE 35 25 26 /* 27 * RFC 5422: Section 4.2.1 - Formats for PAC TLV Attributes / Type Field 28 * Note: bit 0x8000 (Mandatory) and bit 0x4000 (Reserved) are also defined 29 * in the general PAC TLV format (Section 4.2). 30 */ 31 #define PAC_TYPE_PAC_KEY 1 32 #define PAC_TYPE_PAC_OPAQUE 2 33 #define PAC_TYPE_CRED_LIFETIME 3 34 #define PAC_TYPE_A_ID 4 35 #define PAC_TYPE_I_ID 5 36 /* 37 * 6 was previous assigned for SERVER_PROTECTED_DATA, but 38 * draft-cam-winget-eap-fast-provisioning-02.txt changed this to Reserved. 39 */ 40 #define PAC_TYPE_A_ID_INFO 7 41 #define PAC_TYPE_PAC_ACKNOWLEDGEMENT 8 42 #define PAC_TYPE_PAC_INFO 9 43 #define PAC_TYPE_PAC_TYPE 10 44 45 #ifdef _MSC_VER 46 #pragma pack(push, 1) 47 #endif /* _MSC_VER */ 48 49 struct pac_tlv_hdr { 50 be16 type; 51 be16 len; 52 } STRUCT_PACKED; 53 54 #ifdef _MSC_VER 55 #pragma pack(pop) 56 #endif /* _MSC_VER */ 57 58 59 #define EAP_FAST_PAC_KEY_LEN 32 60 61 /* RFC 5422: 4.2.6 PAC-Type TLV */ 62 #define PAC_TYPE_TUNNEL_PAC 1 63 /* Application Specific Short Lived PACs (only in volatile storage) */ 64 /* User Authorization PAC */ 65 #define PAC_TYPE_USER_AUTHORIZATION 3 66 /* Application Specific Long Lived PACs */ 67 /* Machine Authentication PAC */ 68 #define PAC_TYPE_MACHINE_AUTHENTICATION 2 69 70 71 /* 72 * RFC 5422: 73 * Section 3.3 - Key Derivations Used in the EAP-FAST Provisioning Exchange 74 */ 75 struct eap_fast_key_block_provisioning { 76 /* Extra key material after TLS key_block */ 77 u8 session_key_seed[EAP_FAST_SKS_LEN]; 78 u8 server_challenge[16]; /* MSCHAPv2 ServerChallenge */ 79 u8 client_challenge[16]; /* MSCHAPv2 ClientChallenge */ 80 }; 81 82 83 struct wpabuf; 84 struct tls_connection; 85 86 struct eap_fast_tlv_parse { 87 u8 *eap_payload_tlv; 88 size_t eap_payload_tlv_len; 89 struct eap_tlv_crypto_binding_tlv *crypto_binding; 90 size_t crypto_binding_len; 91 int iresult; 92 int result; 93 int request_action; 94 u8 *pac; 95 size_t pac_len; 96 }; 97 98 void eap_fast_put_tlv_hdr(struct wpabuf *buf, u16 type, u16 len); 99 void eap_fast_put_tlv(struct wpabuf *buf, u16 type, const void *data, 100 u16 len); 101 void eap_fast_put_tlv_buf(struct wpabuf *buf, u16 type, 102 const struct wpabuf *data); 103 struct wpabuf * eap_fast_tlv_eap_payload(struct wpabuf *buf); 104 void eap_fast_derive_master_secret(const u8 *pac_key, const u8 *server_random, 105 const u8 *client_random, u8 *master_secret); 106 u8 * eap_fast_derive_key(void *ssl_ctx, struct tls_connection *conn, 107 const char *label, size_t len); 108 void eap_fast_derive_eap_msk(const u8 *simck, u8 *msk); 109 void eap_fast_derive_eap_emsk(const u8 *simck, u8 *emsk); 110 int eap_fast_parse_tlv(struct eap_fast_tlv_parse *tlv, 111 int tlv_type, u8 *pos, int len); 112 113 #endif /* EAP_FAST_H */ 114
