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eapol: Use a separate hs variable

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Instead of using sm->handshake everywhere, use a short-hand hs variable.
This makes some lines a bit more readable.  No functional changes.
This commit is contained in:
Denis Kenzior 2021-07-13 18:29:54 -05:00
parent 10fd485d7d
commit 1a7c5786f6
1 changed files with 35 additions and 40 deletions
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75
src/eapol.c
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@ -1558,6 +1558,7 @@ static void eapol_handle_ptk_3_of_4(struct eapol_sm *sm,
size_t decrypted_key_data_size,
bool unencrypted)
{
struct handshake_state *hs = sm->handshake;
const uint8_t *kck;
const uint8_t *kek;
struct eapol_key *step4;
@ -1571,9 +1572,9 @@ static void eapol_handle_ptk_3_of_4(struct eapol_sm *sm,
uint8_t gtk_key_index;
uint16_t igtk_key_index;
l_debug("ifindex=%u", sm->handshake->ifindex);
l_debug("ifindex=%u", hs->ifindex);
if (!eapol_verify_ptk_3_of_4(ek, sm->handshake->wpa_ie, sm->mic_len)) {
if (!eapol_verify_ptk_3_of_4(ek, hs->wpa_ie, sm->mic_len)) {
handshake_failed(sm, MMPDU_REASON_CODE_UNSPECIFIED);
return;
}
@ -1585,7 +1586,7 @@ static void eapol_handle_ptk_3_of_4(struct eapol_sm *sm,
* or if the ANonce value in message 3 differs from the ANonce value
* in message 1."
*/
if (memcmp(sm->handshake->anonce, ek->key_nonce, sizeof(ek->key_nonce)))
if (memcmp(hs->anonce, ek->key_nonce, sizeof(ek->key_nonce)))
return;
/*
@ -1594,10 +1595,10 @@ static void eapol_handle_ptk_3_of_4(struct eapol_sm *sm,
* not identical to that the STA received in the Beacon or Probe
* Response frame, the STA shall disassociate.
*/
if (sm->handshake->wpa_ie)
if (hs->wpa_ie)
rsne = eapol_find_wpa_ie(decrypted_key_data,
decrypted_key_data_size);
else if (sm->handshake->osen_ie)
else if (hs->osen_ie)
rsne = eapol_find_wfa_kde(decrypted_key_data,
decrypted_key_data_size,
IE_WFA_OI_OSEN);
@ -1609,24 +1610,24 @@ static void eapol_handle_ptk_3_of_4(struct eapol_sm *sm,
if (!rsne)
goto error_ie_different;
if (!handshake_util_ap_ie_matches(rsne, sm->handshake->authenticator_ie,
sm->handshake->wpa_ie))
if (!handshake_util_ap_ie_matches(rsne, hs->authenticator_ie,
hs->wpa_ie))
goto error_ie_different;
if (sm->handshake->akm_suite &
if (hs->akm_suite &
(IE_RSN_AKM_SUITE_FT_OVER_8021X |
IE_RSN_AKM_SUITE_FT_USING_PSK |
IE_RSN_AKM_SUITE_FT_OVER_SAE_SHA256)) {
struct ie_tlv_iter iter;
struct ie_rsn_info ie_info;
const uint8_t *mde = sm->handshake->mde;
const uint8_t *fte = sm->handshake->fte;
const uint8_t *mde = hs->mde;
const uint8_t *fte = hs->fte;
if (ie_parse_rsne_from_data(rsne, rsne[1] + 2, &ie_info) < 0)
goto error_ie_different;
if (ie_info.num_pmkids != 1 || memcmp(ie_info.pmkids,
sm->handshake->pmk_r1_name, 16))
hs->pmk_r1_name, 16))
goto error_ie_different;
ie_tlv_iter_init(&iter, decrypted_key_data,
@ -1656,7 +1657,7 @@ static void eapol_handle_ptk_3_of_4(struct eapol_sm *sm,
* and we wouldn't get here. Skip processing the rest of the message
* and send our reply. Do not install the keys again.
*/
if (sm->handshake->ptk_complete)
if (hs->ptk_complete)
goto retransmit;
/*
@ -1709,12 +1710,11 @@ static void eapol_handle_ptk_3_of_4(struct eapol_sm *sm,
return;
}
handshake_state_override_pairwise_cipher(sm->handshake,
override);
handshake_state_override_pairwise_cipher(hs, override);
}
if (!sm->handshake->wpa_ie && sm->handshake->group_cipher !=
IE_RSN_CIPHER_SUITE_NO_GROUP_TRAFFIC) {
if (!hs->wpa_ie && hs->group_cipher !=
IE_RSN_CIPHER_SUITE_NO_GROUP_TRAFFIC) {
gtk = handshake_util_find_gtk_kde(decrypted_key_data,
decrypted_key_data_size,
&gtk_len);
@ -1731,7 +1731,7 @@ static void eapol_handle_ptk_3_of_4(struct eapol_sm *sm,
} else
gtk = NULL;
if (sm->handshake->mfp) {
if (hs->mfp) {
igtk = handshake_util_find_igtk_kde(decrypted_key_data,
decrypted_key_data_size,
&igtk_len);
@ -1746,7 +1746,7 @@ static void eapol_handle_ptk_3_of_4(struct eapol_sm *sm,
} else
igtk = NULL;
if (sm->handshake->support_ip_allocation) {
if (hs->support_ip_allocation) {
const uint8_t *ip_alloc_kde =
eapol_find_wfa_kde(decrypted_key_data,
decrypted_key_data_size,
@ -1762,15 +1762,12 @@ static void eapol_handle_ptk_3_of_4(struct eapol_sm *sm,
return;
}
sm->handshake->support_ip_allocation = ip_alloc_kde != NULL;
hs->support_ip_allocation = ip_alloc_kde != NULL;
if (ip_alloc_kde) {
sm->handshake->client_ip_addr =
l_get_be32(ip_alloc_kde + 6);
sm->handshake->subnet_mask =
l_get_be32(ip_alloc_kde + 10);
sm->handshake->go_ip_addr =
l_get_be32(ip_alloc_kde + 14);
hs->client_ip_addr = l_get_be32(ip_alloc_kde + 6);
hs->subnet_mask = l_get_be32(ip_alloc_kde + 10);
hs->go_ip_addr = l_get_be32(ip_alloc_kde + 14);
} else
l_debug("Authenticator ignored our IP Address Request");
}
@ -1791,14 +1788,14 @@ retransmit:
step4 = eapol_create_ptk_4_of_4(sm->protocol_version,
ek->key_descriptor_version,
sm->replay_counter,
sm->handshake->wpa_ie, sm->mic_len);
hs->wpa_ie, sm->mic_len);
kck = handshake_state_get_kck(sm->handshake);
kek = handshake_state_get_kek(sm->handshake);
kck = handshake_state_get_kck(hs);
kek = handshake_state_get_kek(hs);
if (sm->mic_len) {
if (!eapol_calculate_mic(sm->handshake->akm_suite, kck,
step4, mic, sm->mic_len)) {
if (!eapol_calculate_mic(hs->akm_suite, kck,
step4, mic, sm->mic_len)) {
l_debug("MIC Calculation failed");
l_free(step4);
handshake_failed(sm, MMPDU_REASON_CODE_UNSPECIFIED);
@ -1807,10 +1804,9 @@ retransmit:
memcpy(EAPOL_KEY_MIC(step4), mic, sm->mic_len);
} else {
if (!eapol_aes_siv_encrypt(
handshake_state_get_kek(sm->handshake),
handshake_state_get_kek_len(sm->handshake),
step4, NULL, 0)) {
if (!eapol_aes_siv_encrypt(handshake_state_get_kek(hs),
handshake_state_get_kek_len(hs),
step4, NULL, 0)) {
l_debug("AES-SIV encryption failed");
l_free(step4);
handshake_failed(sm, MMPDU_REASON_CODE_UNSPECIFIED);
@ -1821,7 +1817,7 @@ retransmit:
eapol_sm_write(sm, (struct eapol_frame *) step4, unencrypted);
l_free(step4);
if (sm->handshake->ptk_complete)
if (hs->ptk_complete)
return;
/*
@ -1829,9 +1825,8 @@ retransmit:
* ptk, this flag tells netdev to wait for the gtk/igtk before
* completing the connection.
*/
if (!gtk && sm->handshake->group_cipher !=
IE_RSN_CIPHER_SUITE_NO_GROUP_TRAFFIC)
sm->handshake->wait_for_gtk = true;
if (!gtk && hs->group_cipher != IE_RSN_CIPHER_SUITE_NO_GROUP_TRAFFIC)
hs->wait_for_gtk = true;
if (gtk)
eapol_install_gtk(sm, gtk_key_index, gtk, gtk_len, ek->key_rsc);
@ -1839,10 +1834,10 @@ retransmit:
if (igtk)
eapol_install_igtk(sm, igtk_key_index, igtk, igtk_len);
handshake_state_install_ptk(sm->handshake);
handshake_state_install_ptk(hs);
if (rekey_offload)
rekey_offload(sm->handshake->ifindex, kek, kck,
rekey_offload(hs->ifindex, kek, kck,
sm->replay_counter, sm->user_data);
l_timeout_remove(sm->timeout);