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crypto/tls: add linkname comments dropped from CL 587220

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A bad merge syncing before the submit of CL 587220 dropped these.
(I forgot to write the file out.)

For #67401.

Change-Id: I6f2ba69f388907f3d24eeef55c80cbb2cf51f580
Reviewed-on: https://go-review.googlesource.com/c/go/+/587755
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Cherry Mui <cherryyz@google.com>
Reviewed-by: Marten Seemann <martenseemann@gmail.com>
This commit is contained in:
Russ Cox 2024-05-22 22:01:35 -04:00
parent 9a8995b8b6
commit 5121b45d74
1 changed files with 20 additions and 0 deletions
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20
src/crypto/tls/defaults.go
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@ -7,6 +7,7 @@ package tls
import (
"internal/godebug"
"slices"
_ "unsafe" // for linkname
)
// Defaults are collected in this file to allow distributions to more easily patch
@ -56,12 +57,31 @@ func defaultCipherSuites() []uint16 {
// defaultCipherSuitesTLS13 is also the preference order, since there are no
// disabled by default TLS 1.3 cipher suites. The same AES vs ChaCha20 logic as
// cipherSuitesPreferenceOrder applies.
//
// defaultCipherSuitesTLS13 should be an internal detail,
// but widely used packages access it using linkname.
// Notable members of the hall of shame include:
// - github.com/quic-go/quic-go
//
// Do not remove or change the type signature.
// See go.dev/issue/67401.
//
//go:linkname defaultCipherSuitesTLS13
var defaultCipherSuitesTLS13 = []uint16{
TLS_AES_128_GCM_SHA256,
TLS_AES_256_GCM_SHA384,
TLS_CHACHA20_POLY1305_SHA256,
}
// defaultCipherSuitesTLS13NoAES should be an internal detail,
// but widely used packages access it using linkname.
// Notable members of the hall of shame include:
// - github.com/quic-go/quic-go
//
// Do not remove or change the type signature.
// See go.dev/issue/67401.
//
//go:linkname defaultCipherSuitesTLS13NoAES
var defaultCipherSuitesTLS13NoAES = []uint16{
TLS_CHACHA20_POLY1305_SHA256,
TLS_AES_128_GCM_SHA256,