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eapol: Handle all zero PMKID

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This commit is contained in:
Denis Kenzior 2018-07-01 20:40:40 -05:00
parent 7676aa2107
commit 1c9a1ea46d
1 changed files with 14 additions and 1 deletions
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15
src/eapol.c
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@ -966,6 +966,8 @@ static void eapol_handle_ptk_1_of_4(struct eapol_sm *sm,
if (handshake_state_get_pmkid(sm->handshake, own_pmkid) && if (handshake_state_get_pmkid(sm->handshake, own_pmkid) &&
memcmp(pmkid, own_pmkid, 16)) { memcmp(pmkid, own_pmkid, 16)) {
l_debug("Authenticator sent a PMKID that didn't match");
/* /*
* If the AP has a different PMKSA from ours and we * If the AP has a different PMKSA from ours and we
* have means to create a new PMKSA through EAP then * have means to create a new PMKSA through EAP then
@ -974,7 +976,18 @@ static void eapol_handle_ptk_1_of_4(struct eapol_sm *sm,
if (sm->eap) { if (sm->eap) {
send_eapol_start(NULL, sm); send_eapol_start(NULL, sm);
return; return;
} else }
/*
* Some APs are known to send a PMKID KDE with all
* zeros for the PMKID. Likely we can still
* successfully negotiate a handshake, so ignore this
* for now and treat it as if the PMKID KDE was not
* included
*/
if (util_mem_is_zero(pmkid, 16))
l_debug("PMKID is all zero, ignoring");
else
goto error_unspecified; goto error_unspecified;
} }
} }