mirror of
https://github.com/vanhoefm/fragattacks.git
synced 2024-11-25 00:38:24 -05:00
43 lines
1.2 KiB
Python
43 lines
1.2 KiB
Python
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#!/usr/bin/env python3
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from libwifi import *
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def netbsd_forcefrag_verify():
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# Capture made using independent TL-WN722N
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cap = rdpcap("../../captures/netbsd-forward-eapol-before-auth-fragmented-1.pcapng")
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fragments = []
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fragments.append(cap[1204][Dot11])
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fragments.append(cap[1207][Dot11])
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fragments.append(cap[1262][Dot11])
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fragments.append(cap[1262][Dot11])
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fragments.append(cap[1266][Dot11])
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fragments.append(cap[1270][Dot11])
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fragments.append(cap[1277][Dot11])
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fragments.append(cap[1355][Dot11])
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# Taken from debug output hostapd on NetBSD
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tk = "b7 2a 27 4c 50 6b c1 3b 86 3d 9a 97 fe 85 8b c9"
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tk = bytes.fromhex(tk.replace(" ", ""))
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print("Testing decryption")
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for frag in fragments:
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decrypt_ccmp(frag, tk)
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# Encrypt newly constructed packet
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pt = fragments[0].copy()
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pt.remove_payload()
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# Note: the import to give the original number of A's so the EAPOL length
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# fields are properly reconstructed. After this, we trim the length.
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payload = LLC()/SNAP()/EAPOL()/EAP(raw(EAP()/Raw(b"A" * 2600)))
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pt = pt/raw(payload)[:2314]
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test = encrypt_ccmp(pt, tk, pn=1)
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print("Testing reconstructed encryption")
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assert raw(fragments[0]) == raw(test)
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def main():
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netbsd_forcefrag_verify()
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if __name__ == "__main__":
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main()
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