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eapol: Simplify GTK install callback

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Instead of passing in the RSN/WPA elements, simply pass in the
configured cipher.  This will make the implementation of the install_gtk
callback much simpler.
This commit is contained in:
Denis Kenzior 2015-05-21 21:08:47 -05:00
parent d4cdd74ae0
commit e93dd44607
3 changed files with 18 additions and 28 deletions
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16
src/eapol.c
View File

@ -1144,9 +1144,13 @@ static void eapol_handle_ptk_3_of_4(uint32_t ifindex,
if (install_tk)
install_tk(sm->ifindex, sm->aa, ptk->tk, rsne, sm->user_data);
if (gtk && install_gtk)
if (gtk && install_gtk) {
uint32_t cipher =
ie_rsn_cipher_suite_to_cipher(sm->group_cipher);
install_gtk(sm->ifindex, gtk_key_index, gtk, gtk_len,
ek->key_rsc, 6, rsne, sm->user_data);
ek->key_rsc, 6, cipher, sm->user_data);
}
fail:
l_free(step4);
@ -1211,9 +1215,13 @@ static void eapol_handle_gtk_1_of_2(uint32_t ifindex,
memcpy(step2->key_mic_data, mic, sizeof(mic));
tx_packet(ifindex, sm->aa, sm->spa, step2, user_data);
if (install_gtk)
if (install_gtk) {
uint32_t cipher =
ie_rsn_cipher_suite_to_cipher(sm->group_cipher);
install_gtk(sm->ifindex, gtk_key_index, gtk, gtk_len,
ek->key_rsc, 6, sm->ap_ie, sm->user_data);
ek->key_rsc, 6, cipher, sm->user_data);
}
done:
l_free(step2);

2
src/eapol.h
View File

@ -105,7 +105,7 @@ typedef void (*eapol_install_tk_func_t)(uint32_t ifindex, const uint8_t *aa,
typedef void (*eapol_install_gtk_func_t)(uint32_t ifindex, uint8_t key_index,
const uint8_t *gtk, uint8_t gtk_len,
const uint8_t *rsc, uint8_t rsc_len,
const uint8_t *rsn, void *user_data);
uint32_t cipher, void *user_data);
typedef void (*eapol_deauthenticate_func_t)(uint32_t ifindex, const uint8_t *aa,
const uint8_t *spa,
uint16_t reason_code,

28
src/wiphy.c
View File

@ -1143,36 +1143,18 @@ static unsigned int mlme_new_group_key(struct netdev *netdev,
static void wiphy_set_gtk(uint32_t ifindex, uint8_t key_index,
const uint8_t *gtk, uint8_t gtk_len,
const uint8_t *rsc, uint8_t rsc_len,
const uint8_t *rsn, void *user_data)
uint32_t cipher, void *user_data)
{
struct netdev *netdev = user_data;
struct ie_rsn_info info;
enum crypto_cipher cipher;
int result;
uint8_t gtk_buf[32];
l_debug("");
if (rsn[0] == IE_TYPE_RSN)
result = ie_parse_rsne_from_data(rsn, rsn[1] + 2, &info);
else if (rsn[0] == IE_TYPE_VENDOR_SPECIFIC)
result = ie_parse_wpa_from_data(rsn, rsn[1] + 2, &info);
else
result = -1;
if (result) {
l_error("Can't parse the RSN");
setting_keys_failed(netdev, MPDU_REASON_CODE_INVALID_IE);
return;
}
switch (info.group_cipher) {
case IE_RSN_CIPHER_SUITE_CCMP:
cipher = CRYPTO_CIPHER_CCMP;
switch (cipher) {
case CRYPTO_CIPHER_CCMP:
memcpy(gtk_buf, gtk, 16);
break;
case IE_RSN_CIPHER_SUITE_TKIP:
cipher = CRYPTO_CIPHER_TKIP;
case CRYPTO_CIPHER_TKIP:
/*
* Swap the TX and RX MIC key portions for supplicant.
* WPA_80211_v3_1_090922 doc's 3.3.4:
@ -1191,7 +1173,7 @@ static void wiphy_set_gtk(uint32_t ifindex, uint8_t key_index,
memcpy(gtk_buf + 24, gtk + 16, 8);
break;
default:
l_error("Unexpected cipher suite: %d", info.group_cipher);
l_error("Unexpected cipher: %x", cipher);
setting_keys_failed(netdev,
MPDU_REASON_CODE_INVALID_GROUP_CIPHER);
return;