Fix typos in wpa_supplicant configuration parameter documentation

[mech_eap.git] / wlantest / tkip.c

diff --git a/wlantest/tkip.c b/wlantest/tkip.c
index 2d626f3..ed3d601 100644 (file)
--- a/wlantest/tkip.c
+++ b/wlantest/tkip.c
@@ -376,6 +376,53 @@ void tkip_get_pn(u8 *pn, const u8 *data)
 u8 * tkip_encrypt(const u8 *tk, u8 *frame, size_t len, size_t hdrlen, u8 *qos,
                  u8 *pn, int keyid, size_t *encrypted_len)
 {
-       /* TODO */
-       return NULL;
+       u8 michael_hdr[16];
+       u8 mic[8];
+       struct ieee80211_hdr *hdr;
+       u16 fc;
+       const u8 *mic_key;
+       u8 *crypt, *pos;
+       u16 iv16;
+       u32 iv32;
+       u16 ttak[5];
+       u8 rc4key[16];
+
+       if (len < sizeof(*hdr) || len < hdrlen)
+               return NULL;
+       hdr = (struct ieee80211_hdr *) frame;
+       fc = le_to_host16(hdr->frame_control);
+
+       michael_mic_hdr(hdr, michael_hdr);
+       mic_key = tk + ((fc & WLAN_FC_FROMDS) ? 16 : 24);
+       michael_mic(mic_key, michael_hdr, frame + hdrlen, len - hdrlen, mic);
+       wpa_hexdump(MSG_EXCESSIVE, "TKIP: MIC", mic, sizeof(mic));
+
+       iv32 = WPA_GET_BE32(pn);
+       iv16 = WPA_GET_BE16(pn + 4);
+       tkip_mixing_phase1(ttak, tk, hdr->addr2, iv32);
+       wpa_hexdump(MSG_EXCESSIVE, "TKIP TTAK", (u8 *) ttak, sizeof(ttak));
+       tkip_mixing_phase2(rc4key, tk, ttak, iv16);
+       wpa_hexdump(MSG_EXCESSIVE, "TKIP RC4KEY", rc4key, sizeof(rc4key));
+
+       crypt = os_malloc(len + 8 + sizeof(mic) + 4);
+       if (crypt == NULL)
+               return NULL;
+       os_memcpy(crypt, frame, hdrlen);
+       pos = crypt + hdrlen;
+       os_memcpy(pos, rc4key, 3);
+       pos += 3;
+       *pos++ = keyid << 6 | BIT(5);
+       *pos++ = pn[3];
+       *pos++ = pn[2];
+       *pos++ = pn[1];
+       *pos++ = pn[0];
+
+       os_memcpy(pos, frame + hdrlen, len - hdrlen);
+       os_memcpy(pos + len - hdrlen, mic, sizeof(mic));
+       WPA_PUT_LE32(pos + len - hdrlen + sizeof(mic),
+                    crc32(pos, len - hdrlen + sizeof(mic)));
+       wep_crypt(rc4key, pos, len - hdrlen + sizeof(mic) + 4);
+
+       *encrypted_len = len + 8 + sizeof(mic) + 4;
+       return crypt;
 }