eap_pax_common.h

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#ifndef EAP_PAX_COMMON_H
#define EAP_PAX_COMMON_H

#ifdef _MSC_VER
#pragma pack(push, 1)
#endif /* _MSC_VER */

struct eap_pax_hdr {
        u8 op_code;
        u8 flags;
        u8 mac_id;
        u8 dh_group_id;
        u8 public_key_id;
        /* Followed by variable length payload and ICV */
} STRUCT_PACKED;

#ifdef _MSC_VER
#pragma pack(pop)
#endif /* _MSC_VER */


/* op_code: */
enum {
        EAP_PAX_OP_STD_1 = 0x01,
        EAP_PAX_OP_STD_2 = 0x02,
        EAP_PAX_OP_STD_3 = 0x03,
        EAP_PAX_OP_SEC_1 = 0x11,
        EAP_PAX_OP_SEC_2 = 0x12,
        EAP_PAX_OP_SEC_3 = 0x13,
        EAP_PAX_OP_SEC_4 = 0x14,
        EAP_PAX_OP_SEC_5 = 0x15,
        EAP_PAX_OP_ACK = 0x21
};

/* flags: */
#define EAP_PAX_FLAGS_MF                        0x01
#define EAP_PAX_FLAGS_CE                        0x02
#define EAP_PAX_FLAGS_AI                        0x04

/* mac_id: */
#define EAP_PAX_MAC_HMAC_SHA1_128               0x01
#define EAP_PAX_HMAC_SHA256_128                 0x02

/* dh_group_id: */
#define EAP_PAX_DH_GROUP_NONE                   0x00
#define EAP_PAX_DH_GROUP_2048_MODP              0x01
#define EAP_PAX_DH_GROUP_3072_MODP              0x02
#define EAP_PAX_DH_GROUP_NIST_ECC_P_256         0x03

/* public_key_id: */
#define EAP_PAX_PUBLIC_KEY_NONE                 0x00
#define EAP_PAX_PUBLIC_KEY_RSAES_OAEP           0x01
#define EAP_PAX_PUBLIC_KEY_RSA_PKCS1_V1_5       0x02
#define EAP_PAX_PUBLIC_KEY_EL_GAMAL_NIST_ECC    0x03

/* ADE type: */
#define EAP_PAX_ADE_VENDOR_SPECIFIC             0x01
#define EAP_PAX_ADE_CLIENT_CHANNEL_BINDING      0x02
#define EAP_PAX_ADE_SERVER_CHANNEL_BINDING      0x03


#define EAP_PAX_RAND_LEN 32
#define EAP_PAX_MAC_LEN 16
#define EAP_PAX_ICV_LEN 16
#define EAP_PAX_AK_LEN 16
#define EAP_PAX_MK_LEN 16
#define EAP_PAX_CK_LEN 16
#define EAP_PAX_ICK_LEN 16
#define EAP_PAX_MID_LEN 16


int eap_pax_kdf(u8 mac_id, const u8 *key, size_t key_len,
                const char *identifier,
                const u8 *entropy, size_t entropy_len,
                size_t output_len, u8 *output);
int eap_pax_mac(u8 mac_id, const u8 *key, size_t key_len,
                const u8 *data1, size_t data1_len,
                const u8 *data2, size_t data2_len,
                const u8 *data3, size_t data3_len,
                u8 *mac);
int eap_pax_initial_key_derivation(u8 mac_id, const u8 *ak, const u8 *e,
                                   u8 *mk, u8 *ck, u8 *ick, u8 *mid);

#endif /* EAP_PAX_COMMON_H */