Closed jeyabharathi12 closed 2 years ago
Has same problem. If it's not supported, is there any other programmable way to get decrypted plain text from TLS packets?
Please refer to argument override_prefs
of FileCapture
.
e.g.
import os
import pyshark
cap = pyshark.FileCapture(
'google.pcap', use_json=True, include_raw=True,
override_prefs={'ssl.keylog_file': os.path.abspath('sslkeys_google.log')},
debug=True)
Please refer to argument
override_prefs
ofFileCapture
. e.g.import os import pyshark cap = pyshark.FileCapture( 'google.pcap', use_json=True, include_raw=True, override_prefs={'ssl.keylog_file': os.path.abspath('sslkeys_google.log')}, debug=True)
Can you please help with accessing the decrypted data?
I am able to see the decrypted data in wireshark but not able to figure out how to see the decrypted data using pyshark, not sure if pyshark even decrypts it.
When I pretty print the packet, it shows the Encrypted Application Data as under.
Layer TLS: TLSv1.2 Record Layer: Application Data Protocol: http-over-tls Content Type: Application Data (23) Version: TLS 1.2 (0x0303) Length: 51 Encrypted Application Data: 19710...................................
I am using LiveCapture.
I had the same problem and I found a solution for decrpyting the TLS connections, so I hope this helps (I am not a python pro...)
I was able to see the decrpyted TLS traffic in Wireshark and after unsuccessfully trying to access it with pyshark I suddenly realized there are 2 new layers in Wireshark: Websocket and DATA-TEXT-LINES.
So I tried to access those two like the other layers and this finally worked: I was able to print the decrypted app data using the DATA-TEXT-LINES layer.
This is the code, that works for me:
import pyshark
import os
capture = pyshark.FileCapture('C:/Users/xxxxxxx/py_gfua/files/26042021.pcapng',
display_filter='ip.src == xxx.xxx.xxx.xx',
override_prefs={'tls.keylog_file': os.path.abspath('./py_gfua/tlskey.log')},
debug=True)
for packet in capture:
if "DATA-TEXT-LINES" in packet:
#print(packet.layers)
print(packet['DATA-TEXT-LINES'])
else:
print("whatever, not decrypted data")
2 hints:
The decrypted data is printed like this:
Layer DATA-TEXT-LINES: [truncated][{"xxxxxxxxxxxxxxxxxxxxxxxx....
Now to my question or problem: The data is 'truncated' because it is limited to 256 characters. Unfortunately my encrypted data is longer, appr. 1000 characters.
Does someone have a solution to print or access the whole data? It works in Wireshark but I´m stuck at getting it working using pyshark?
@August1328 I've got the same issue. Have you find a way around? It is strange enough that the data downloaded doesn't come truncated already. In Wireshark it is quite straightforward to decompress them and avoid truncated losses.
@eltonrosa I read a little further into the Wireshark documentation, but I did not solve this resp. I did not put too much effort into this since using the decrpyted data was not 100% legal...
Anyways, I remember that I found out there is a max character limit and one should try to change this value in the program code and then recompile it - that´s where I stopped. But I still got the link, hope this helps:
https://osqa-ask.wireshark.org/questions/62019/packet-data-being-truncated-in-columns/
Does someone have a solution to print or access the whole data? It works in Wireshark but I´m stuck at getting it working using pyshark?
If you're using a proxy (and its a HTTPS request) then they will be two HTTP layers.
for packet in capture.sniff_continuously():
http_layers = packet.get_multiple_layers('http')
for http_layer in http_layers[::-1]:
if http_layer.has_field('file_data'):
print(http_layer.file_data)
break
I am able to decrypt TLS packets using wireshark as I have master key, but I want to know how to do using PyShark. How to decrypt TLS Packets using PyShark?