From: Sergey Matveev <stargrave@stargrave.org>
Date: Fri, 3 Sep 2021 12:31:09 +0000 (+0300)
Subject: Pretty print TLS version
X-Git-Tag: v0.1.0~11
X-Git-Url: http://www.git.cypherpunks.ru/?p=ucspi.git;a=commitdiff_plain;h=92364d4e6d98a38edb92b7be377bc7ceae228c21

Pretty print TLS version
---

diff --git a/cmd/tlsc/main.go b/cmd/tlsc/main.go
index 6985e5c..80813b4 100644
--- a/cmd/tlsc/main.go
+++ b/cmd/tlsc/main.go
@@ -116,8 +116,10 @@ func main() {
 	connState := tlsConn.ConnectionState()
 	if *onlyShow {
 		fmt.Fprintf(
-			os.Stderr, "Version: %04x\nCipherSuite: %s\n",
-			connState.Version, tls.CipherSuiteName(connState.CipherSuite),
+			os.Stderr,
+			"Version: %s\nCipherSuite: %s\n",
+			ucspi.TLSVersion(connState.Version),
+			tls.CipherSuiteName(connState.CipherSuite),
 		)
 		for _, cert := range connState.PeerCertificates {
 			os.Stderr.WriteString("\n")
diff --git a/tls.go b/tls.go
new file mode 100644
index 0000000..2092400
--- /dev/null
+++ b/tls.go
@@ -0,0 +1,18 @@
+package ucspi
+
+import "crypto/tls"
+
+func TLSVersion(v uint16) string {
+	switch v {
+	case tls.VersionTLS10:
+		return "1.0"
+	case tls.VersionTLS11:
+		return "1.1"
+	case tls.VersionTLS12:
+		return "1.2"
+	case tls.VersionTLS13:
+		return "1.3"
+	default:
+		return "unknown"
+	}
+}