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iwd
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eapol: Handle Step 1 & 2 of 4-way Handshake

This commit is contained in:
Denis Kenzior 2015-02-24 11:13:57 -06:00
parent 9e6cbc5b60
commit da1180841d
1 changed files with 39 additions and 0 deletions
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39
src/eapol.c
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@ -488,6 +488,45 @@ void eapol_start(int ifindex, struct eapol_sm *sm)
l_hashmap_insert(state_machines, L_UINT_TO_PTR(ifindex), sm);
}
static void eapol_handle_ptk_1_of_4(int ifindex, struct eapol_sm *sm,
const struct eapol_key *ek)
{
struct crypto_ptk *ptk = (struct crypto_ptk *) sm->ptk;
struct eapol_key *step2;
uint8_t mic[16];
if (!eapol_verify_ptk_1_of_4(ek))
return;
if (!sm->have_snonce) {
if (!get_nonce(sm->snonce))
return;
sm->have_snonce = true;
}
memcpy(sm->anonce, ek->key_nonce, sizeof(ek->key_nonce));
crypto_derive_pairwise_ptk(sm->pmk, sm->sta_addr, sm->aa_addr,
sm->anonce, sm->snonce,
ptk, sizeof(sm->ptk));
step2 = eapol_create_ptk_2_of_4(protocol_version,
ek->key_descriptor_version,
sm->replay_counter,
sm->snonce,
sm->own_rsn_size, sm->own_rsn);
if (!eapol_calculate_mic(ptk->kck, step2, mic))
goto fail;
memcpy(step2->key_mic_data, mic, sizeof(mic));
tx_packet(ifindex, sm->aa_addr, sm->sta_addr, step2);
fail:
l_free(step2);
}
void __eapol_rx_packet(int ifindex, const uint8_t *sta_addr,
const uint8_t *aa_addr,
const uint8_t *frame, size_t len)