feat: add GREASEEncryptedClientHelloExtension

refraction-networking / utls

Fork of the Go standard TLS library, providing low-level access to the ClientHello for mimicry purposes.

BSD 3-Clause "New" or "Revised" License

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feat: add GREASEEncryptedClientHelloExtension #266

Closed gaukas closed 11 months ago

gaukas commented 11 months ago

[x] Finalize EncryptedClientHelloExtension interface
Add GREASEEncryptedClientHelloExtension extension
- ~Correctly calculate the length of EncodedClientHelloInner~
- [x] Allow specifying the length of payload
- [x] Randomize cipher suite, config id, enc, and payload
[x] Handle EncryptedExtension encrypted_client_hello

Reference

crypto/tls: implement draft-ietf-tls-esni-13 under https://github.com/cloudflare/go/commits/cf/src/crypto/tls

gaukas commented 11 months ago

@VeNoMouS, feel free to either rebase your work on this branch/PR or just take it as a reference (if you had a pretty much incompatible implementation).

These changes are heavily based on cloudflare/go so later if we are porting the full support of ECH it may save us some effort.

VeNoMouS commented 11 months ago

@gaukas you on discord, can discuss other stuff your missing

gaukas commented 11 months ago

Sure, we can setup a meeting. I am pretty booked today until night (~6PM Mountain or later) and will have more time tomorrow. Lemme know your availability?

Btw my discord handle is also @gaukas.