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DPP: Allow Responder to decide not to use mutual authentication

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Previously, Initiator decided whether to use mutual authentication on
its own based on having own and peer bootstrapping info. This prevented
Responder from selecting not to use mutual authentication in such a
case. Fix this by allowed Initiator to fall back to non-mutual
authentication based on Responder choice if the bootstrapping mechanism
allows this (PKEX does not; it mandates use of mutual authentication).

Signed-off-by: Jouni Malinen <jouni@qca.qualcomm.com>
This commit is contained in:
Jouni Malinen 2017-10-23 14:14:57 +03:00 committed by Jouni Malinen
parent b3a93f8fab
commit 9b51112031
1 changed files with 17 additions and 0 deletions
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17
src/common/dpp.c
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@ -2841,6 +2841,11 @@ dpp_auth_resp_rx(struct dpp_authentication *auth, const u8 *hdr,
"Initiator Bootstrapping Key Hash attribute did not match");
return NULL;
}
} else if (auth->own_bi && auth->own_bi->type == DPP_BOOTSTRAP_PKEX) {
/* PKEX bootstrapping mandates use of mutual authentication */
dpp_auth_fail(auth,
"Missing Initiator Bootstrapping Key Hash attribute");
return NULL;
}
status = dpp_get_attr(attr_start, attr_len, DPP_ATTR_STATUS,
@ -2859,6 +2864,12 @@ dpp_auth_resp_rx(struct dpp_authentication *auth, const u8 *hdr,
return NULL;
}
if (!i_bootstrap && auth->own_bi) {
wpa_printf(MSG_DEBUG,
"DPP: Responder decided not to use mutual authentication");
auth->own_bi = NULL;
}
r_proto = dpp_get_attr(attr_start, attr_len, DPP_ATTR_R_PROTOCOL_KEY,
&r_proto_len);
if (!r_proto) {
@ -3102,6 +3113,12 @@ int dpp_auth_conf_rx(struct dpp_authentication *auth, const u8 *hdr,
"Initiator Bootstrapping Key Hash mismatch");
return -1;
}
} else if (auth->own_bi && auth->peer_bi) {
/* Mutual authentication and peer did not include its
* Bootstrapping Key Hash attribute. */
dpp_auth_fail(auth,
"Missing Initiator Bootstrapping Key Hash attribute");
return -1;
}
status = dpp_get_attr(attr_start, attr_len, DPP_ATTR_STATUS,