k8s cmd: use authclient package (#1722)

cmd/pomerium-cli/main.go

@@ -1,10 +1,13 @@
 package main
 
 import (
+	"crypto/tls"
 	"fmt"
 	"os"
 
 	"github.com/spf13/cobra"
+
+	"github.com/pomerium/pomerium/pkg/cryptutil"
 )
 
 var rootCmd = &cobra.Command{
@@ -22,3 +25,18 @@ func fatalf(msg string, args ...interface{}) {
 	fmt.Fprintf(os.Stderr, msg+"\n", args...)
 	os.Exit(1)
 }
+
+func getTLSConfig(insecureSkipVerify bool, caCert, alternateCAPath string) *tls.Config {
+	cfg := new(tls.Config)
+	if insecureSkipVerify {
+		cfg.InsecureSkipVerify = true
+	}
+	if caCert != "" {
+		var err error
+		cfg.RootCAs, err = cryptutil.GetCertPool(caCert, alternateCAPath)
+		if err != nil {
+			fatalf("%s", err)
+		}
+	}
+	return cfg
+}