Streamlit-webrtc error - "Unsupported key type" error in from_cryptography_key in python3.9/site-packages/OpenSSL/crypto.py file

🧩 Custom Components streamlit-webrtc
1

Hi,
testing the webrtc component locally with the basic code:

from streamlit_webrtc import webrtc_streamer
webrtc_streamer(key=“example”)

it worked last week, but it stopped working today with the following error:

TypeError: Unsupported key type

Traceback:

File ".../lib/python3.9/site-packages/streamlit/runtime/scriptrunner/script_runner.py", line 565, in _run_script exec(code, module.__dict__)
File ".../streamlit-webrtc-main/pages/test_webrtc.py", line 37, in <module>
    webrtc_streamer(key="example", video_frame_callback=videoFilter)
File ".../lib/python3.9/site-packages/streamlit_webrtc/component.py", line 568, in webrtc_streamer
    webrtc_worker = WebRtcWorker(
File ".../lib/python3.9/site-packages/streamlit_webrtc/webrtc.py", line 375, in __init__
    self.pc = RTCPeerConnection()
File ".../lib/python3.9/site-packages/aiortc/rtcpeerconnection.py", line 294, in __init__
    self.__certificates = [RTCCertificate.generateCertificate()]
File ".../lib/python3.9/site-packages/aiortc/rtcdtlstransport.py", line 156, in generateCertificate
    key=crypto.PKey.from_cryptography_key(key),
File "..../lib/python3.9/site-packages/OpenSSL/crypto.py", line 274, in from_cryptography_key
    raise TypeError("Unsupported key type")

I have updated streamlit to version 1.19.0 and streamlit-webrtc to version 0.44.7. but i’m still facing the same issue. Please guide me on what to do in order to resolve this issue. Thank you.

2

Manage to get webrtc running in streamlit again. Not sure if this is the solution, @whitphx - but this works for now.

I found that my issue was related to an outdated version of pyOpenSSL -

current version was 23.0.0 and the version in my conda was 22.0.0 - so i had to update it - using pip didn’t work for me, so i used conda

conda install -c conda-forge pyopenssl

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