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airdecap-ng [2006/11/19 16:12]
airdecap-ng [2009/08/14 17:13]
mister_x used dokuwiki internal link
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 ===== Description ===== ===== Description =====
-With airdecap you can decrypt WEP/WPA capture files.+With airdecap-ng you can decrypt WEP/WPA/WPA2 capture files.  As well, it can be used to strip the wireless headers from an unencrypted wireless capture.
-=====  Usage =====+It outputs a new file ending with "-dec.cap" which is the decrypted/stripped version of the input file. 
 +===== Usage =====
   airdecap-ng [options] <pcap file>   airdecap-ng [options] <pcap file>
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 |-l| |don't remove the 802.11 header| |-l| |don't remove the 802.11 header|
 |-b|bssid|access point MAC address filter| |-b|bssid|access point MAC address filter|
-|-k|pmk|WPA Pairwise Master Key in hex|+|-k|pmk|WPA/WPA2 Pairwise Master Key in hex|
 |-e|essid|target network ascii identifier| |-e|essid|target network ascii identifier|
-|-p|pass|target network WPA passphrase| +|-p|pass|target network WPA/WPA2 passphrase| 
-|-w|key| target network WEP key in hex|+|-w|key| target network WEP key in hexadecimal|
 +Wildcards may be used on the input file name providing it only matches a single file.  In general, it is recommended that you use a single file name as input, not wildcarding.
-===== Examples  =====+===== Usage Examples =====
 +The following removes the wireless headers from an open network (no WEP) capture:
   airdecap-ng -b 00:09:5B:10:BC:5A open-network.cap   airdecap-ng -b 00:09:5B:10:BC:5A open-network.cap
 +The following decrypts a WEP-encrypted capture using a hexadecimal WEP key:
   airdecap-ng -w 11A3E229084349BC25D97E2939 wep.cap   airdecap-ng -w 11A3E229084349BC25D97E2939 wep.cap
 +The following decrypts a WPA/WPA2 encrypted capture using the passphrase:
   airdecap-ng -e 'the ssid' -p passphrase  tkip.cap   airdecap-ng -e 'the ssid' -p passphrase  tkip.cap
 +===== Usage Tips =====
 +==== WPA/WPA2 Requirements ====
 +The capture file must contain a valid four-way handshake.  For this purpose having (packets 2 and 3) or (packets 3 and 4) will work correctly.  You in fact don't truly need all four handshake packets.
 +As well, only data packets following the handshake will be decrypted.  This is because information is required from the handshake in order to decrypt the data packets.
 +==== How to use spaces, double quote and single quote in AP names? ====
 +See this [[:faq#how_to_use_spaces_double_quote_and_single_quote_in_ap_names|FAQ entry]]
 +===== Usage Troubleshooting =====
 +None at this time.
airdecap-ng.txt · Last modified: 2009/09/26 20:07 by darkaudax