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WPS: Allow Device Password Id changes between PIN methods

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Commit b4a17a6ea7 added support for the
WPS Registrar to change the Device Password based on WSC specification
design. However, this added validation for Registrar behavior which
resulted in preventing a common P2P use case from working. Relax the
validation rules for builds with P2P enabled to allow the Enrollee (P2P
client) accepting M1/M2 changes in Device Password Id between Default
and Registrar-specified PIN.

Signed-hostap: Jouni Malinen <j@w1.fi>
This commit is contained in:
Jouni Malinen 2013-05-28 00:35:47 +03:00
parent 1ba51ec02b
commit 9b1693a162
1 changed files with 18 additions and 0 deletions
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18
src/wps/wps_enrollee.c
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@ -842,6 +842,24 @@ static int wps_process_dev_pw_id(struct wps_data *wps, const u8 *dev_pw_id)
return 0;
}
#ifdef CONFIG_P2P
if ((id == DEV_PW_DEFAULT &&
wps->dev_pw_id == DEV_PW_REGISTRAR_SPECIFIED) ||
(id == DEV_PW_REGISTRAR_SPECIFIED &&
wps->dev_pw_id == DEV_PW_DEFAULT)) {
/*
* Common P2P use cases indicate whether the PIN is from the
* client or GO using Device Password Id in M1/M2 in a way that
* does not look fully compliant with WSC specification. Anyway,
* this is deployed and needs to be allowed, so ignore changes
* between Registrar-Specified and Default PIN.
*/
wpa_printf(MSG_DEBUG, "WPS: Allow PIN Device Password ID "
"change");
return 0;
}
#endif /* CONFIG_P2P */
wpa_printf(MSG_DEBUG, "WPS: Registrar trying to change Device Password "
"ID from %u to %u", wps->dev_pw_id, id);