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eapol: add eapol_find_osen

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The OSEN AKM uses the vendor specific IE, so when finding the RSNE
element we need to handle it specially to ensure that its both
a vendor specific element and it matches the WFA OUI since other
vendor specific elements may be included.
This commit is contained in:
James Prestwood 2019-06-10 15:46:57 -07:00 committed by Denis Kenzior
parent 058d65c686
commit d3baec4eee
1 changed files with 26 additions and 4 deletions
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30
src/eapol.c
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@ -1391,6 +1391,25 @@ static const uint8_t *eapol_find_rsne(const uint8_t *data, size_t data_len,
return first; return first;
} }
static const uint8_t *eapol_find_osen(const uint8_t *data, size_t data_len)
{
struct ie_tlv_iter iter;
ie_tlv_iter_init(&iter, data, data_len);
while (ie_tlv_iter_next(&iter)) {
if (ie_tlv_iter_get_tag(&iter) == IE_TYPE_VENDOR_SPECIFIC) {
if (!is_ie_wfa_ie(iter.data, iter.len, IE_WFA_OI_OSEN))
continue;
} else
continue;
return ie_tlv_iter_get_data(&iter) - 2;
}
return NULL;
}
/* 802.11-2016 Section 12.7.6.3 */ /* 802.11-2016 Section 12.7.6.3 */
static void eapol_handle_ptk_2_of_4(struct eapol_sm *sm, static void eapol_handle_ptk_2_of_4(struct eapol_sm *sm,
const struct eapol_key *ek) const struct eapol_key *ek)
@ -1507,13 +1526,16 @@ static void eapol_handle_ptk_3_of_4(struct eapol_sm *sm,
* not identical to that the STA received in the Beacon or Probe * not identical to that the STA received in the Beacon or Probe
* Response frame, the STA shall disassociate. * Response frame, the STA shall disassociate.
*/ */
if (!sm->handshake->wpa_ie) if (sm->handshake->wpa_ie)
rsne = eapol_find_wpa_ie(decrypted_key_data,
decrypted_key_data_size);
else if (sm->handshake->osen_ie)
rsne = eapol_find_osen(decrypted_key_data,
decrypted_key_data_size);
else
rsne = eapol_find_rsne(decrypted_key_data, rsne = eapol_find_rsne(decrypted_key_data,
decrypted_key_data_size, decrypted_key_data_size,
&optional_rsne); &optional_rsne);
else
rsne = eapol_find_wpa_ie(decrypted_key_data,
decrypted_key_data_size);
if (!rsne) if (!rsne)
goto error_ie_different; goto error_ie_different;