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netdev: Add netdev_preauthenticate

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Add preauthentication logic.  The callback receives the new PMK only.
This commit is contained in:
Andrew Zaborowski 2017-04-29 03:53:27 +02:00 committed by Denis Kenzior
parent b910784e83
commit 08e863cb7e
2 changed files with 64 additions and 1 deletions
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59
src/netdev.c
View File

@ -50,6 +50,7 @@
#include "src/netdev.h"
#include "src/wscutil.h"
#include "src/ftutil.h"
#include "src/util.h"
struct netdev {
uint32_t index;
@ -87,6 +88,12 @@ struct netdev {
bool in_ft : 1;
};
struct netdev_preauth_state {
netdev_preauthenticate_cb_t cb;
void *user_data;
struct netdev *netdev;
};
struct netdev_watch {
uint32_t id;
netdev_watch_func_t callback;
@ -281,6 +288,17 @@ static void netdev_operstate_down_cb(bool success, void *user_data)
l_debug("netdev: %d, success: %d", index, success);
}
static void netdev_preauth_destroy(void *data)
{
struct netdev_preauth_state *state = data;
if (state->cb)
state->cb(state->netdev, NETDEV_RESULT_ABORTED, NULL,
state->user_data);
l_free(state);
}
static void netdev_connect_free(struct netdev *netdev)
{
if (netdev->sm) {
@ -288,6 +306,8 @@ static void netdev_connect_free(struct netdev *netdev)
netdev->sm = NULL;
}
eapol_preauth_cancel(netdev->index);
if (netdev->handshake) {
handshake_state_free(netdev->handshake);
netdev->handshake = NULL;
@ -1039,7 +1059,7 @@ static void netdev_handshake_failed(uint32_t ifindex,
if (!netdev)
return;
l_error("4-Way Handshake failed for ifindex: %d", ifindex);
l_error("4-Way handshake failed for ifindex: %d", ifindex);
netdev->sm = NULL;
@ -2340,6 +2360,43 @@ restore_snonce:
return err;
}
static void netdev_preauth_cb(const uint8_t *pmk, void *user_data)
{
struct netdev_preauth_state *preauth = user_data;
netdev_preauthenticate_cb_t cb = preauth->cb;
preauth->cb = NULL;
cb(preauth->netdev,
pmk ? NETDEV_RESULT_OK : NETDEV_RESULT_HANDSHAKE_FAILED,
pmk, preauth->user_data);
}
int netdev_preauthenticate(struct netdev *netdev, struct scan_bss *target_bss,
netdev_preauthenticate_cb_t cb, void *user_data)
{
struct netdev_preauth_state *preauth;
if (!netdev->operational)
return -ENOTCONN;
preauth = l_new(struct netdev_preauth_state, 1);
if (!eapol_preauth_start(target_bss->addr, netdev->handshake,
netdev_preauth_cb, preauth,
netdev_preauth_destroy)) {
l_free(preauth);
return -EIO;
}
preauth->cb = cb;
preauth->user_data = user_data;
preauth->netdev = netdev;
return 0;
}
static uint32_t netdev_send_action_frame(struct netdev *netdev,
const uint8_t *to,
const uint8_t *body, size_t body_len,

6
src/netdev.h
View File

@ -76,6 +76,9 @@ typedef void (*netdev_eapol_event_func_t)(unsigned int event,
typedef void (*netdev_neighbor_report_cb_t)(struct netdev *netdev, int err,
const uint8_t *reports,
size_t reports_len, void *user_data);
typedef void (*netdev_preauthenticate_cb_t)(struct netdev *netdev,
enum netdev_result result,
const uint8_t *pmk, void *user_data);
const uint8_t *netdev_get_address(struct netdev *netdev);
uint32_t netdev_get_ifindex(struct netdev *netdev);
@ -101,6 +104,9 @@ int netdev_reassociate(struct netdev *netdev, struct scan_bss *target_bss,
netdev_connect_cb_t cb);
int netdev_fast_transition(struct netdev *netdev, struct scan_bss *target_bss,
netdev_connect_cb_t cb);
int netdev_preauthenticate(struct netdev *netdev, struct scan_bss *target_bss,
netdev_preauthenticate_cb_t cb,
void *user_data);
int netdev_set_powered(struct netdev *netdev, bool powered,
netdev_set_powered_cb_t cb, void *user_data,