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crypto/tls: ensure the server picked an advertised ALPN protocol

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This is a SHALL in RFC 7301, Section 3.2.

Also some more cleanup after NPN, which worked the other way around
(with the possibility that the client could pick a protocol the server
did not suggest).

Change-Id: I83cc43ca1b3c686dfece8315436441c077065d82
Reviewed-on: https://go-review.googlesource.com/c/go/+/239748
Run-TryBot: Filippo Valsorda <filippo@golang.org>
TryBot-Result: Go Bot <gobot@golang.org>
Trust: Filippo Valsorda <filippo@golang.org>
Trust: Roland Shoemaker <roland@golang.org>
Reviewed-by: Roland Shoemaker <roland@golang.org>
This commit is contained in:
Filippo Valsorda 2020-06-24 17:01:00 -04:00
parent 74ff83e750
commit 3e0f07eb2d
6 changed files with 30 additions and 30 deletions
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3
common.go
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@ -229,9 +229,6 @@ type ConnectionState struct {
CipherSuite uint16
// NegotiatedProtocol is the application protocol negotiated with ALPN.
//
// Note that on the client side, this is currently not guaranteed to be from
// Config.NextProtos.
NegotiatedProtocol string
// NegotiatedProtocolIsMutual used to indicate a mutual NPN negotiation.