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wlantest: Add decryption of CCMP-256, GCMP, GCMP-256

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This extends wlantest support for decrypting the new cipher suites.

Signed-off-by: Jouni Malinen <jouni@qca.qualcomm.com>
master
Ashok Kumar Ponnaiah 10 years ago committed by Jouni Malinen
parent 3a3cb8ee81
commit eb2223e0ec
4 changed files with 56 additions and 14 deletions
Show Stats Download Patch File Download Diff File

1
wlantest/Makefile
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@ -72,6 +72,7 @@ OBJS += ctrl.o
OBJS += inject.o
OBJS += wep.o
OBJS += bip.o
OBJS += gcmp.o
LIBS += -lpcap

60
wlantest/rx_data.c
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@ -103,14 +103,24 @@ static u8 * try_all_ptk(struct wlantest *wt, int pairwise_cipher,
wpa_debug_level = MSG_WARNING;
dl_list_for_each(ptk, &wt->ptk, struct wlantest_ptk, list) {
unsigned int tk_len = ptk->ptk_len - 32;
decrypted = NULL;
if ((pairwise_cipher == WPA_CIPHER_CCMP ||
pairwise_cipher == 0) && ptk->ptk_len == 48) {
pairwise_cipher == 0) && tk_len == 16) {
decrypted = ccmp_decrypt(ptk->ptk.tk1, hdr, data,
data_len, decrypted_len);
}
if ((pairwise_cipher == WPA_CIPHER_TKIP ||
pairwise_cipher == 0) && ptk->ptk_len == 64) {
} else if ((pairwise_cipher == WPA_CIPHER_CCMP_256 ||
pairwise_cipher == 0) && tk_len == 32) {
decrypted = ccmp_256_decrypt(ptk->ptk.tk1, hdr, data,
data_len, decrypted_len);
} else if ((pairwise_cipher == WPA_CIPHER_GCMP ||
pairwise_cipher == WPA_CIPHER_GCMP_256 ||
pairwise_cipher == 0) &&
(tk_len == 16 || tk_len == 32)) {
decrypted = gcmp_decrypt(ptk->ptk.tk1, tk_len, hdr,
data, data_len, decrypted_len);
} else if ((pairwise_cipher == WPA_CIPHER_TKIP ||
pairwise_cipher == 0) && tk_len == 32) {
decrypted = tkip_decrypt(ptk->ptk.tk1, hdr, data,
data_len, decrypted_len);
}
@ -133,7 +143,7 @@ static void rx_data_bss_prot_group(struct wlantest *wt,
{
struct wlantest_bss *bss;
int keyid;
u8 *decrypted;
u8 *decrypted = NULL;
size_t dlen;
u8 pn[6];
@ -209,9 +219,17 @@ skip_replay_det:
&dlen);
else if (bss->group_cipher == WPA_CIPHER_WEP40)
decrypted = wep_decrypt(wt, hdr, data, len, &dlen);
else
else if (bss->group_cipher == WPA_CIPHER_CCMP)
decrypted = ccmp_decrypt(bss->gtk[keyid], hdr, data, len,
&dlen);
else if (bss->group_cipher == WPA_CIPHER_CCMP_256)
decrypted = ccmp_256_decrypt(bss->gtk[keyid], hdr, data, len,
&dlen);
else if (bss->group_cipher == WPA_CIPHER_GCMP ||
bss->group_cipher == WPA_CIPHER_GCMP_256)
decrypted = gcmp_decrypt(bss->gtk[keyid], bss->gtk_len[keyid],
hdr, data, len, &dlen);
if (decrypted) {
rx_data_process(wt, bss->bssid, NULL, dst, src, decrypted,
dlen, 1, NULL);
@ -383,15 +401,31 @@ static void rx_data_bss_prot(struct wlantest *wt,
}
skip_replay_det:
if (tk)
decrypted = ccmp_decrypt(tk, hdr, data, len, &dlen);
else if (sta->pairwise_cipher == WPA_CIPHER_TKIP)
if (tk) {
if (sta->pairwise_cipher == WPA_CIPHER_CCMP_256)
decrypted = ccmp_256_decrypt(tk, hdr, data, len, &dlen);
else if (sta->pairwise_cipher == WPA_CIPHER_GCMP ||
sta->pairwise_cipher == WPA_CIPHER_GCMP_256)
decrypted = gcmp_decrypt(tk, sta->tk_len, hdr, data,
len, &dlen);
else
decrypted = ccmp_decrypt(tk, hdr, data, len, &dlen);
} else if (sta->pairwise_cipher == WPA_CIPHER_TKIP) {
decrypted = tkip_decrypt(sta->ptk.tk1, hdr, data, len, &dlen);
else if (sta->pairwise_cipher == WPA_CIPHER_WEP40)
} else if (sta->pairwise_cipher == WPA_CIPHER_WEP40) {
decrypted = wep_decrypt(wt, hdr, data, len, &dlen);
else if (sta->ptk_set)
decrypted = ccmp_decrypt(sta->ptk.tk1, hdr, data, len, &dlen);
else {
} else if (sta->ptk_set) {
if (sta->pairwise_cipher == WPA_CIPHER_CCMP_256)
decrypted = ccmp_256_decrypt(sta->ptk.tk1, hdr, data,
len, &dlen);
else if (sta->pairwise_cipher == WPA_CIPHER_GCMP ||
sta->pairwise_cipher == WPA_CIPHER_GCMP_256)
decrypted = gcmp_decrypt(sta->ptk.tk1, sta->tk_len,
hdr, data, len, &dlen);
else
decrypted = ccmp_decrypt(sta->ptk.tk1, hdr, data, len,
&dlen);
} else {
decrypted = try_all_ptk(wt, sta->pairwise_cipher, hdr, data,
len, &dlen);
ptk_iter_done = 1;

8
wlantest/rx_eapol.c
Unescape Escape View File

@ -96,7 +96,10 @@ static int try_pmk(struct wlantest *wt, struct wlantest_bss *bss,
struct wlantest_pmk *pmk)
{
struct wpa_ptk ptk;
size_t ptk_len = sta->pairwise_cipher == WPA_CIPHER_TKIP ? 64 : 48;
size_t ptk_len;
ptk_len = wpa_cipher_key_len(sta->pairwise_cipher) + 32;
wpa_pmk_to_ptk(pmk->pmk, sizeof(pmk->pmk),
"Pairwise key expansion",
bss->bssid, sta->addr, sta->anonce, sta->snonce,
@ -105,6 +108,7 @@ static int try_pmk(struct wlantest *wt, struct wlantest_bss *bss,
if (check_mic(ptk.kck, ver, data, len) < 0)
return -1;
sta->tk_len = wpa_cipher_key_len(sta->pairwise_cipher);
wpa_printf(MSG_INFO, "Derived PTK for STA " MACSTR " BSSID " MACSTR,
MAC2STR(sta->addr), MAC2STR(bss->bssid));
sta->counters[WLANTEST_STA_COUNTER_PTK_LEARNED]++;
@ -170,6 +174,8 @@ static void derive_ptk(struct wlantest *wt, struct wlantest_bss *bss,
MACSTR " BSSID " MACSTR,
MAC2STR(sta->addr), MAC2STR(bss->bssid));
add_note(wt, MSG_DEBUG, "Using pre-set PTK");
ptk->ptk_len = 32 +
wpa_cipher_key_len(sta->pairwise_cipher);
os_memcpy(&sta->ptk, &ptk->ptk, sizeof(ptk->ptk));
wpa_hexdump(MSG_DEBUG, "PTK:KCK", sta->ptk.kck, 16);
wpa_hexdump(MSG_DEBUG, "PTK:KEK", sta->ptk.kek, 16);

1
wlantest/wlantest.h
Unescape Escape View File

@ -70,6 +70,7 @@ struct wlantest_sta {
u8 anonce[32]; /* ANonce from the previous EAPOL-Key msg 1/4 or 3/4 */
u8 snonce[32]; /* SNonce from the previous EAPOL-Key msg 2/4 */
struct wpa_ptk ptk; /* Derived PTK */
size_t tk_len;
int ptk_set;
struct wpa_ptk tptk; /* Derived PTK during rekeying */
int tptk_set;

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