airdecap-ng: add page (#9974)

* airdecap-ng: add page

* Fixed typos

pages/common/airdecap-ng.md

@@ -0,0 +1,25 @@
+# airdecap-ng
+
+> Decrypt a WEP, WPA or WPA2 encrypted capture file.
+> Part of Aircrack-ng network software suite.
+> More information: <https://www.aircrack-ng.org/doku.php?id=airdecap-ng>.
+
+- Remove wireless headers from an open network capture file and use the access point's MAC address to filter:
+
+`airdecap-ng -b {{ap_mac}} {{path/to/capture.cap}}`
+
+- Decrypt a WEP encrypted capture file using the key in hex format:
+
+`airdecap-ng -w {{hex_key}} {{path/to/capture.cap}}`
+
+- Decrypt a WPA/WPA2 encrypted capture file using the access point's [e]ssid and [p]assword:
+
+`airdecap-ng -e {{essid}} -p {{password}} {{path/to/capture.cap}}`
+
+- Decrypt a WPA/WPA2 encrypted capture file preserving the headers using the access point's [e]ssid and [p]assword:
+
+`airdecap-ng -l -e {{essid}} -p {{password}} {{path/to/capture.cap}}`
+
+- Decrypt a WPA/WPA2 encrypted capture file using the access point's [e]ssid and [p]assword and use its MAC address to filter:
+
+`airdecap-ng -b {{ap_mac}} -e {{essid}} -p {{password}} {{path/to/capture.cap}}`