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Add GET_PMK for fetching the current PMK for a STA from hostapd

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This test functionality (CONFIG_TESTING_OPTIONS=y) can be used to fetch
the current PMK for a STA.

Signed-off-by: Jouni Malinen <jouni@codeaurora.org>
This commit is contained in:
Jouni Malinen 2020-02-10 02:19:52 +02:00
parent ca1cecc54d
commit 31d7fe9171
1 changed files with 31 additions and 0 deletions
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31
hostapd/ctrl_iface.c
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@ -2388,6 +2388,34 @@ static int hostapd_ctrl_resend_group_m1(struct hostapd_data *hapd,
plain ? restore_tk : NULL, hapd, sta); plain ? restore_tk : NULL, hapd, sta);
} }
static int hostapd_ctrl_get_pmk(struct hostapd_data *hapd, const char *cmd,
char *buf, size_t buflen)
{
struct sta_info *sta;
u8 addr[ETH_ALEN];
const u8 *pmk;
int pmk_len;
if (hwaddr_aton(cmd, addr))
return -1;
sta = ap_get_sta(hapd, addr);
if (!sta || !sta->wpa_sm) {
wpa_printf(MSG_DEBUG, "No STA WPA state machine for " MACSTR,
MAC2STR(addr));
return -1;
}
pmk = wpa_auth_get_pmk(sta->wpa_sm, &pmk_len);
if (!pmk) {
wpa_printf(MSG_DEBUG, "No PMK stored for " MACSTR,
MAC2STR(addr));
return -1;
}
return wpa_snprintf_hex(buf, buflen, pmk, pmk_len);
}
#endif /* CONFIG_TESTING_OPTIONS */ #endif /* CONFIG_TESTING_OPTIONS */
@ -3256,6 +3284,9 @@ static int hostapd_ctrl_iface_receive_process(struct hostapd_data *hapd,
} else if (os_strcmp(buf, "REKEY_GTK") == 0) { } else if (os_strcmp(buf, "REKEY_GTK") == 0) {
if (wpa_auth_rekey_gtk(hapd->wpa_auth) < 0) if (wpa_auth_rekey_gtk(hapd->wpa_auth) < 0)
reply_len = -1; reply_len = -1;
} else if (os_strncmp(buf, "GET_PMK ", 8) == 0) {
reply_len = hostapd_ctrl_get_pmk(hapd, buf + 8, reply,
reply_size);
#endif /* CONFIG_TESTING_OPTIONS */ #endif /* CONFIG_TESTING_OPTIONS */
} else if (os_strncmp(buf, "CHAN_SWITCH ", 12) == 0) { } else if (os_strncmp(buf, "CHAN_SWITCH ", 12) == 0) {
if (hostapd_ctrl_iface_chan_switch(hapd->iface, buf + 12)) if (hostapd_ctrl_iface_chan_switch(hapd->iface, buf + 12))