transport/tlscommon/versions_default.go

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package tlscommon

import (
	"crypto/tls"
)

// Define all the possible TLS version.
const (
	TLSVersion10 TLSVersion = tls.VersionTLS10
	TLSVersion11 TLSVersion = tls.VersionTLS11
	TLSVersion12 TLSVersion = tls.VersionTLS12
	TLSVersion13 TLSVersion = tls.VersionTLS13
)

var (
	// TLSVersionMax is the max TLS version supported.
	TLSVersionMax = TLSVersion13

	// TLSVersionDefaultMin is the minimal default TLS version that is
	// enabled by default. TLSVersionDefaultMin is >= TLSVersionMin
	TLSVersionDefaultMin = TLSVersion12

	// TLSVersionDefaultMax is the max default TLS version that
	// is enabled by default.
	TLSVersionDefaultMax = TLSVersionMax
)

// TLSDefaultVersions list of versions of TLS we should support.
var TLSDefaultVersions = []TLSVersion{
	TLSVersion12,
	TLSVersion13,
}

var tlsProtocolVersions = map[string]TLSVersion{
	"TLSv1":   TLSVersion10,
	"TLSv1.0": TLSVersion10,
	"TLSv1.1": TLSVersion11,
	"TLSv1.2": TLSVersion12,
	"TLSv1.3": TLSVersion13,
}

// Intended for ECS's tls.version_protocol_field, which does not include
// numeric version and should be lower case
type TLSVersionDetails struct {
	Version  string
	Protocol string
	Combined string
}

func (pv TLSVersionDetails) String() string {
	return pv.Combined
}

var tlsInverseLookup = map[TLSVersion]TLSVersionDetails{
	TLSVersion10: TLSVersionDetails{Version: "1.0", Protocol: "tls", Combined: "TLSv1.0"},
	TLSVersion11: TLSVersionDetails{Version: "1.1", Protocol: "tls", Combined: "TLSv1.1"},
	TLSVersion12: TLSVersionDetails{Version: "1.2", Protocol: "tls", Combined: "TLSv1.2"},
	TLSVersion13: TLSVersionDetails{Version: "1.3", Protocol: "tls", Combined: "TLSv1.3"},
}