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refactor+feat: Custom Client Handshake + Implement ALPS extension (#142)

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* refactor: split `CompressCertExtension` changes

- Split most of changes for `CompressCertExtension` made to `crypto/tls` files out and moved them to `u_` files.
- Edited some `crypto/tls` files to achieve better programmability for uTLS.
- Minor styling fix.

* feat: implement ALPS Extension draft

- Made necessary modifications to existing types to support ALPS.
- Ported `ApplicationSettingsExtension` implementation from `ulixee/utls` by @blakebyrnes with some adaptation.

Co-Authored-By: Blake Byrnes <115056+blakebyrnes@users.noreply.github.com>

* feat: utlsFakeCustomExtension in ALPS

- Introducing `utlsFakeCustomExtension` to enable implementation for custom extensions to be exchanged via ALPS.
- currently it doesn't do anything.

Co-Authored-By: Blake Byrnes <115056+blakebyrnes@users.noreply.github.com>

* fix: magic number in `StatusRequestV2Extension`

- Fixed magic number `17` in `StatusRequestV2Extension` with pre-defined enum `extensionStatusRequestV2`.

Co-authored-by: Blake Byrnes <115056+blakebyrnes@users.noreply.github.com>
This commit is contained in:
Gaukas Wang 2022-11-17 14:04:29 -07:00 • committed by GitHub
parent 1b3a9ad4c5
commit fb99df2a2e
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13 changed files with 375 additions and 140 deletions
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4
u_fingerprinter.go
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@ -321,7 +321,7 @@ func (f *Fingerprinter) FingerprintClientHello(data []byte) (*ClientHelloSpec, e
case fakeExtensionChannelID:
clientHelloSpec.Extensions = append(clientHelloSpec.Extensions, &FakeChannelIDExtension{})
case fakeExtensionChannelIDOld:
case fakeOldExtensionChannelID:
clientHelloSpec.Extensions = append(clientHelloSpec.Extensions, &FakeChannelIDExtension{true})
case fakeExtensionTokenBinding:
@ -335,7 +335,7 @@ func (f *Fingerprinter) FingerprintClientHello(data []byte) (*ClientHelloSpec, e
tokenBindingExt.KeyParameters = keyParameters
clientHelloSpec.Extensions = append(clientHelloSpec.Extensions, &tokenBindingExt)
case fakeExtensionALPS:
case utlsExtensionApplicationSettings:
// Similar to ALPN (RFC 7301, Section 3.1):
// https://datatracker.ietf.org/doc/html/draft-vvv-tls-alps#section-3
var protoList cryptobyte.String