From f8cbf5ad3a60f977753695b13e7e6e52ba319ed4 Mon Sep 17 00:00:00 2001
From: yuhan6665 <1588741+yuhan6665@users.noreply.github.com>
Date: Sat, 14 Oct 2023 09:17:19 -0400
Subject: [PATCH] crypto/tls: add VersionName

Fixes #46308

Change-Id: I5162b26cbce61ae5df5d2e093cf8a28406d15863
Reviewed-on: https://go-review.googlesource.com/c/go/+/497377
Auto-Submit: Filippo Valsorda <filippo@golang.org>
Reviewed-by: Marten Seemann <martenseemann@gmail.com>
Reviewed-by: Roland Shoemaker <roland@golang.org>
Reviewed-by: Ian Lance Taylor <iant@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Samuli Silvius <samuli.silvius@gmail.com>
Reviewed-by: Damien Neil <dneil@google.com>
Run-TryBot: Filippo Valsorda <filippo@golang.org>
---
 common.go | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)

diff --git a/common.go b/common.go
index 966a487..c801535 100644
--- a/common.go
+++ b/common.go
@@ -36,6 +36,26 @@ const (
 	VersionSSL30 = 0x0300
 )
 
+// VersionName returns the name for the provided TLS version number
+// (e.g. "TLS 1.3"), or a fallback representation of the value if the
+// version is not implemented by this package.
+func VersionName(version uint16) string {
+	switch version {
+	case VersionSSL30:
+		return "SSLv3"
+	case VersionTLS10:
+		return "TLS 1.0"
+	case VersionTLS11:
+		return "TLS 1.1"
+	case VersionTLS12:
+		return "TLS 1.2"
+	case VersionTLS13:
+		return "TLS 1.3"
+	default:
+		return fmt.Sprintf("0x%04X", version)
+	}
+}
+
 const (
 	maxPlaintext       = 16384        // maximum plaintext payload length
 	maxCiphertext      = 16384 + 2048 // maximum ciphertext payload length