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2dbc959699
Use size_t instead of int for storing and comparing the TLV length against the remaining buffer length to make this easier for static analyzers to understand. Signed-off-by: Jouni Malinen <j@w1.fi>
108 lines
2.9 KiB
C
108 lines
2.9 KiB
C
/*
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* EAP-FAST definitions (RFC 4851)
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* Copyright (c) 2004-2008, Jouni Malinen <j@w1.fi>
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*
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* This software may be distributed under the terms of the BSD license.
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* See README for more details.
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*/
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#ifndef EAP_FAST_H
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#define EAP_FAST_H
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#define EAP_FAST_VERSION 1
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#define EAP_FAST_KEY_LEN 64
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#define EAP_FAST_SIMCK_LEN 40
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#define EAP_FAST_SKS_LEN 40
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#define EAP_FAST_CMK_LEN 20
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#define TLS_EXT_PAC_OPAQUE 35
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/*
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* RFC 5422: Section 4.2.1 - Formats for PAC TLV Attributes / Type Field
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* Note: bit 0x8000 (Mandatory) and bit 0x4000 (Reserved) are also defined
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* in the general PAC TLV format (Section 4.2).
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*/
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#define PAC_TYPE_PAC_KEY 1
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#define PAC_TYPE_PAC_OPAQUE 2
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#define PAC_TYPE_CRED_LIFETIME 3
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#define PAC_TYPE_A_ID 4
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#define PAC_TYPE_I_ID 5
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/*
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* 6 was previous assigned for SERVER_PROTECTED_DATA, but
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* draft-cam-winget-eap-fast-provisioning-02.txt changed this to Reserved.
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*/
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#define PAC_TYPE_A_ID_INFO 7
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#define PAC_TYPE_PAC_ACKNOWLEDGEMENT 8
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#define PAC_TYPE_PAC_INFO 9
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#define PAC_TYPE_PAC_TYPE 10
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#ifdef _MSC_VER
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#pragma pack(push, 1)
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#endif /* _MSC_VER */
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struct pac_tlv_hdr {
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be16 type;
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be16 len;
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} STRUCT_PACKED;
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#ifdef _MSC_VER
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#pragma pack(pop)
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#endif /* _MSC_VER */
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#define EAP_FAST_PAC_KEY_LEN 32
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/* RFC 5422: 4.2.6 PAC-Type TLV */
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#define PAC_TYPE_TUNNEL_PAC 1
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/* Application Specific Short Lived PACs (only in volatile storage) */
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/* User Authorization PAC */
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#define PAC_TYPE_USER_AUTHORIZATION 3
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/* Application Specific Long Lived PACs */
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/* Machine Authentication PAC */
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#define PAC_TYPE_MACHINE_AUTHENTICATION 2
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/*
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* RFC 5422:
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* Section 3.3 - Key Derivations Used in the EAP-FAST Provisioning Exchange
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*/
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struct eap_fast_key_block_provisioning {
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/* Extra key material after TLS key_block */
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u8 session_key_seed[EAP_FAST_SKS_LEN];
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u8 server_challenge[16]; /* MSCHAPv2 ServerChallenge */
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u8 client_challenge[16]; /* MSCHAPv2 ClientChallenge */
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};
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struct wpabuf;
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struct tls_connection;
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struct eap_fast_tlv_parse {
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u8 *eap_payload_tlv;
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size_t eap_payload_tlv_len;
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struct eap_tlv_crypto_binding_tlv *crypto_binding;
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size_t crypto_binding_len;
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int iresult;
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int result;
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int request_action;
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u8 *pac;
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size_t pac_len;
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};
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void eap_fast_put_tlv_hdr(struct wpabuf *buf, u16 type, u16 len);
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void eap_fast_put_tlv(struct wpabuf *buf, u16 type, const void *data,
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u16 len);
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void eap_fast_put_tlv_buf(struct wpabuf *buf, u16 type,
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const struct wpabuf *data);
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struct wpabuf * eap_fast_tlv_eap_payload(struct wpabuf *buf);
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void eap_fast_derive_master_secret(const u8 *pac_key, const u8 *server_random,
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const u8 *client_random, u8 *master_secret);
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u8 * eap_fast_derive_key(void *ssl_ctx, struct tls_connection *conn,
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const char *label, size_t len);
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void eap_fast_derive_eap_msk(const u8 *simck, u8 *msk);
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void eap_fast_derive_eap_emsk(const u8 *simck, u8 *emsk);
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int eap_fast_parse_tlv(struct eap_fast_tlv_parse *tlv,
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int tlv_type, u8 *pos, size_t len);
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#endif /* EAP_FAST_H */
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