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feat: utlsFakeCustomExtension in ALPS

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- 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>
This commit is contained in:
Gaukas Wang 2022-11-10 21:56:19 -07:00
parent f69c124214
commit 776b61fa20
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GPG key ID: 9E2F8986D76F8B5D
2 changed files with 8 additions and 0 deletions
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1
u_common.go
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@ -30,6 +30,7 @@ const (
utlsExtensionExtendedMasterSecret uint16 = 23 // https://tools.ietf.org/html/rfc7627 utlsExtensionExtendedMasterSecret uint16 = 23 // https://tools.ietf.org/html/rfc7627
utlsExtensionCompressCertificate uint16 = 27 // https://datatracker.ietf.org/doc/html/rfc8879#section-7.1 utlsExtensionCompressCertificate uint16 = 27 // https://datatracker.ietf.org/doc/html/rfc8879#section-7.1
utlsExtensionApplicationSettings uint16 = 17513 // not IANA assigned utlsExtensionApplicationSettings uint16 = 17513 // not IANA assigned
utlsFakeExtensionCustom uint16 = 1234 // not IANA assigned, for ALPS
// extensions with 'fake' prefix break connection, if server echoes them back // extensions with 'fake' prefix break connection, if server echoes them back
fakeExtensionTokenBinding uint16 = 24 fakeExtensionTokenBinding uint16 = 24

7
u_handshake_messages.go
View file

@ -71,6 +71,7 @@ type utlsClientEncryptedExtensionsMsg struct {
raw []byte raw []byte
applicationSettings []byte applicationSettings []byte
hasApplicationSettings bool hasApplicationSettings bool
customExtension []byte
} }
func (m *utlsClientEncryptedExtensionsMsg) marshal() (x []byte) { func (m *utlsClientEncryptedExtensionsMsg) marshal() (x []byte) {
@ -88,6 +89,12 @@ func (m *utlsClientEncryptedExtensionsMsg) marshal() (x []byte) {
msg.AddBytes(m.applicationSettings) msg.AddBytes(m.applicationSettings)
}) })
} }
if len(m.customExtension) > 0 {
extensions.AddUint16(utlsFakeExtensionCustom)
extensions.AddUint16LengthPrefixed(func(msg *cryptobyte.Builder) {
msg.AddBytes(m.customExtension)
})
}
}) })
}) })