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OWE: Allow Diffie-Hellman Parameter element to be included with DPP

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The previous OWE implementation on the AP side rejected any
(Re)Association Request frame with the Diffie-Hellman Parameter element
if AKM was not OWE. This breaks compatibility with DPP PFS, so relax
that rule to allow DPP AKM to be used as well. While this commit alone
does not add support for PFS, this allows interoperability between
non-PFS implementation on the AP and a newer PFS implementation on the
STA.

Signed-off-by: Jouni Malinen <jouni@codeaurora.org>
This commit is contained in:
Jouni Malinen 2019-03-18 00:25:11 +02:00 committed by Jouni Malinen
parent e71a90711d
commit 16a4e931f0
1 changed files with 6 additions and 0 deletions
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6
src/ap/wpa_auth_ie.c
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@ -835,6 +835,12 @@ int wpa_validate_wpa_ie(struct wpa_authenticator *wpa_auth,
"OWE: No Diffie-Hellman Parameter element"); "OWE: No Diffie-Hellman Parameter element");
return WPA_INVALID_AKMP; return WPA_INVALID_AKMP;
} }
#ifdef CONFIG_DPP
if (sm->wpa_key_mgmt == WPA_KEY_MGMT_DPP && owe_dh) {
/* Diffie-Hellman Parameter element can be used with DPP as
* well, so allow this to proceed. */
} else
#endif /* CONFIG_DPP */
if (sm->wpa_key_mgmt != WPA_KEY_MGMT_OWE && owe_dh) { if (sm->wpa_key_mgmt != WPA_KEY_MGMT_OWE && owe_dh) {
wpa_printf(MSG_DEBUG, wpa_printf(MSG_DEBUG,
"OWE: Unexpected Diffie-Hellman Parameter element with non-OWE AKM"); "OWE: Unexpected Diffie-Hellman Parameter element with non-OWE AKM");