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DPP2: Add Enrollee netAccessKey group into Reconfig Announcement

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This was added to the protocol design to support cases where the
C-sign-key uses a different group than the netAccessKey. The Enrollee
now indicates its netAccessKey group in Reconfig Announcement and the
Configurator builds it own reconfig Connector using that group instead
of the group used for the C-sign-key.

Signed-off-by: Jouni Malinen <jouni@codeaurora.org>
This commit is contained in:
Jouni Malinen 2020-08-06 19:47:28 +03:00 • committed by Jouni Malinen
parent 1837648e71
commit e5be6e68c8
7 changed files with 113 additions and 28 deletions
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17
src/common/dpp_tcp.c
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@ -844,11 +844,12 @@ static int dpp_controller_rx_reconfig_announcement(struct dpp_connection *conn,
const u8 *hdr, const u8 *buf,
size_t len)
{
const u8 *csign_hash;
u16 csign_hash_len;
const u8 *csign_hash, *fcgroup;
u16 csign_hash_len, fcgroup_len;
struct dpp_configurator *conf;
struct dpp_global *dpp = conn->ctrl->global;
struct dpp_authentication *auth;
u16 group;
if (conn->auth) {
wpa_printf(MSG_DEBUG,
@ -874,7 +875,17 @@ static int dpp_controller_rx_reconfig_announcement(struct dpp_connection *conn,
return -1;
}
auth = dpp_reconfig_init(dpp, dpp->msg_ctx, conf, 0);
fcgroup = dpp_get_attr(buf, len, DPP_ATTR_FINITE_CYCLIC_GROUP,
&fcgroup_len);
if (!fcgroup || fcgroup_len != 2) {
wpa_msg(dpp->msg_ctx, MSG_INFO, DPP_EVENT_FAIL
"Missing or invalid required Finite Cyclic Group attribute");
return -1;
}
group = WPA_GET_LE16(fcgroup);
wpa_printf(MSG_DEBUG, "DPP: Enrollee finite cyclic group: %u", group);
auth = dpp_reconfig_init(dpp, dpp->msg_ctx, conf, 0, group);
if (!auth)
return -1;
if (dpp_set_configurator(auth, conn->ctrl->configurator_params) < 0) {