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crypto/tls, runtime: document GODEBUG TLS 1.3 option

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Change-Id: I6801676335924414ce50249df2b7bea08886b203
Reviewed-on: https://go-review.googlesource.com/c/162360
Reviewed-by: Filippo Valsorda <filippo@golang.org>
This commit is contained in:
Brad Fitzpatrick 2019-02-13 16:15:09 +00:00
parent b690d7e513
commit 48bb611667
2 changed files with 10 additions and 1 deletions
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9
src/crypto/tls/tls.go
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@ -4,6 +4,15 @@
// Package tls partially implements TLS 1.2, as specified in RFC 5246,
// and TLS 1.3, as specified in RFC 8446.
//
// TLS 1.3 is available only on an opt-in basis in Go 1.12. To enable
// it, set the GODEBUG environment variable (comma-separated key=value
// options) such that it includes "tls13=1". To enable it from within
// the process, set the environment variable before any use of TLS:
//
// func init() {
// os.Setenv("GODEBUG", os.Getenv("GODEBUG")+",tls13=1")
// }
package tls
// BUG(agl): The crypto/tls package only implements some countermeasures

2
src/runtime/extern.go
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@ -127,7 +127,7 @@ It is a comma-separated list of name=val pairs setting these named variables:
IDs will refer to the ID of the goroutine at the time of creation; it's possible for this
ID to be reused for another goroutine. Setting N to 0 will report no ancestry information.
The net and net/http packages also refer to debugging variables in GODEBUG.
The net, net/http, and crypto/tls packages also refer to debugging variables in GODEBUG.
See the documentation for those packages for details.
The GOMAXPROCS variable limits the number of operating system threads that