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Secure websocket with Tshark over live capture

asked 2019-06-29 06:30:49 +0000

iulian gravatar image

updated 2019-06-29 10:49:18 +0000

grahamb gravatar image


So I've been able to decode a live capture WSS over HTTPS (of course) with Wireshark but it seems that TShark is not capable of doing so unless I am doing something wrong.

Here is how I am running it but the output is empty

C:\Program Files\Wireshark>tshark.exe -i 4 -o tls.keylog_file:C:\Users\iulian\Desktop\ssl.txt -o tls.desegment_ssl_records:TRUE -o tls.desegment_ssl_application_data:TRUE -d tcp.port==443,tls -Y websocket



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answered 2019-07-01 09:29:43 +0000

SYN-bit gravatar image

Do you use a non-default profile in Wireshark, if so, you might need to add -C <profile-name> to your tshark command to have it behave the same as Wireshark.

Without specifying a profile I would add -o tcp.desegment_tcp_streams:TRUE to your command to make sure TCP allows reassembly by the TLS dissector.

Does either of these suggestions make WSS decryption work for you with tshark?

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Asked: 2019-06-29 06:30:49 +0000

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Last updated: Jul 01 '19