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eapol: Fix trying to include uninitialized data 

If OCI is not used, then the oci array is never initialized.  Do not try
to include it in our GTK 2_of_2 message.

Fixes: ad4d639854 ("eapol: include OCI in GTK 2/2")
This commit is contained in:
Denis Kenzior 2021-10-08 09:27:03 -05:00
parent 24d4790537
commit 80ed3ef5b2
1 changed files with 21 additions and 16 deletions
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37
src/eapol.c
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@ -1122,6 +1122,20 @@ static inline size_t append_ie(uint8_t *ies, const uint8_t *ie)
return ie[1] + 2;
}
static size_t append_oci(uint8_t *ies, const struct band_chandef *chandef)
{
unsigned int len = 0;
ies[len++] = IE_TYPE_VENDOR_SPECIFIC;
ies[len++] = 4 + 3;
l_put_be32(HANDSHAKE_KDE_OCI, ies + len);
len += 4;
oci_from_chandef(chandef, ies + len);
len += 3;
return len;
}
static void eapol_handle_ptk_1_of_4(struct eapol_sm *sm,
const struct eapol_key *ek,
bool unencrypted)
@ -1266,14 +1280,8 @@ static void eapol_handle_ptk_1_of_4(struct eapol_sm *sm,
* dot11RSNAOperatingChannelValidationActivated is true on the
* Supplicant."
*/
if (sm->handshake->supplicant_ocvc && sm->handshake->chandef) {
ies[ies_len++] = IE_TYPE_VENDOR_SPECIFIC;
ies[ies_len++] = 4 + 3;
l_put_be32(HANDSHAKE_KDE_OCI, ies + ies_len);
ies_len += 4;
oci_from_chandef(sm->handshake->chandef, ies + ies_len);
ies_len += 3;
}
if (sm->handshake->supplicant_ocvc && sm->handshake->chandef)
ies_len += append_oci(ies + ies_len, sm->handshake->chandef);
/*
* 802.11-2020, Section 12.7.6.3:
@ -2075,7 +2083,8 @@ static void eapol_handle_gtk_1_of_2(struct eapol_sm *sm,
uint16_t igtk_key_index;
const uint8_t *oci = NULL;
size_t oci_len;
uint8_t oci_out[9];
uint8_t ies[1024];
size_t ies_len = 0;
l_debug("ifindex=%u", hs->ifindex);
@ -2143,12 +2152,8 @@ static void eapol_handle_gtk_1_of_2(struct eapol_sm *sm,
* appears to be a copy-paste from a previous section. Above it has been
* changed to Supplicant.
*/
if (sm->handshake->supplicant_ocvc && sm->handshake->chandef) {
oci_out[0] = IE_TYPE_VENDOR_SPECIFIC;
oci_out[1] = 4 + 3;
l_put_be32(HANDSHAKE_KDE_OCI, oci_out + 2);
oci_from_chandef(sm->handshake->chandef, oci_out + 6);
}
if (sm->handshake->supplicant_ocvc && sm->handshake->chandef)
ies_len += append_oci(ies + ies_len, sm->handshake->chandef);
/*
* 802.11-2016, Section 12.7.7.2:
@ -2171,7 +2176,7 @@ static void eapol_handle_gtk_1_of_2(struct eapol_sm *sm,
step2 = eapol_create_gtk_2_of_2(sm->protocol_version,
ek->key_descriptor_version,
sm->replay_counter,
oci_out[1] + 2, oci_out,
ies_len, ies,
hs->wpa_ie, ek->wpa_key_id,
sm->mic_len);