can I disable encryption while testing?

[Winters123]

Hi, I'm wondering if I can disable encryption while testing. If so, what should I do?

BTW, I noticed this in the doc: Important - ChaCha20-Poly1305 is not yet supported with MsQuic and Schannel, so this doesn't do anything yet. Does it mean that I could bypass encryption when I choose to use ChaCha20-Poly1305?

[nibanks]

No, you can't leverage unsupported ChaCha20-Poly1305 to just disable encryption. It doesn't work at all, so it won't even let you try to use it. We have a flag that leverages a QUIC extension I wrote to disable QUIC encryption after the handshake, but I suspect it's not going to help you. It might be best if you start a new question asking to the core of what you're trying to accomplish and we can follow up there.

[nibanks]

How are you determining it's still encrypted? Wireshark doesn't support this extension, so it doesn't show it as decrypted.

[wtao0221]

I sent the "hello world" message and used tcpdump to check the packet.

If the payload is not encrypted, I may be able to see the plain text?

BTW, do you have any recommendation of tools inspecting the packets?

[nibanks]

I recommend taking a look at https://github.com/microsoft/msquic/blob/main/docs/Diagnostics.md and grab the logs to see what's going on.

[wtao0221]

Thanks!

Interestingly, i think i overlapped with some sizeof(QUIC_BUFFER) bytes. (what is it for?)

BTW, is there any example showing how to read received bytes from a stream? I saw the struct of STREAM_EVENT only has number of bytes received, but i am not sure where the buffer is.

[nibanks]

https://github.com/microsoft/msquic/blob/main/docs/Streams.md should have the details you need. If it's missing something, please open up an issue with what you'd like to see in it, with as much detail as possible.