When it does occur, in the top right corner you’ll see something like: CH 9 ][ WPA handshake: XX:XX:XX:XX:XX:XX With this, we’re waiting for any WPA handshake to happen. Maybe an overkill for the sake of the example, but we’re going to use couple of Devices:ĭumping everything you capture to a FILE ( *.cap): $ airodump-ng -w mon0 Capturing WPA/WPA2 Handshake with Aircrack-ng Below you’ll find a complete python code you can use to experiment. With that, we have everything we need to calculate MIC, which you can further use to validate your attempts to crack password. #kck = hmac.new(pmk, message, hashlib.sha1).digest() #ptk = hmac.new(pmk, message, hashlib.sha1).digest() Key_data = min(ap_mac,s_mac) + max(ap_mac,s_mac) + min(anonce,snonce) + max(anonce,snonce) Sample python code for generating the keys: pmk = hashlib.pbkdf2_hmac('sha1', passphrase, SSID.encode(), 4096, 32) PTK can be generated with a function (customPRF512) or simply by calling hmac lib. 64 bits- MIC Authenticator Rx Key (MIC Rx) – Only used with TKIP configurations for unicast packets sent by clients.64 bits – MIC Authenticator Tx Key (MIC Tx) – Only used with TKIP configurations for unicast packets sent by access points.128 bits – Temporal Key (TK) – Used for the encryption and decryption of unicast packets.128 bits – Key Encryption Key (KEK) – Used by the AP during data encryption.128bits – Key Confirmation Key (KCK) – Used during the creation of the MIC.The result is 512bit PTK which are treated as 5 separate keys: PTK is dependent on ANOUNCE, SNOUNCE, AP & Station MAC Addresses and PMK. Print "Pairwise Master Key (PMK): " + PBKDF2(phrase, ssid, 4096).read(32).encode("hex")) The 4096 iterations to create 256 bit PMK with SSID used as salt and PSK (passphrase) used as the base of entire process.
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