Adding tls support for akms-ckms client and server

Description

Related Issue

Motivation and Context

How Has This Been Tested?

Screenshots (if appropriate):

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have read the CONTRIBUTING document.
• I have added tests to cover my changes.
• All new and existing tests passed.

akms-simulator/akms-simulator.go

@@ -6,7 +6,6 @@ import (
 	"encoding/json"
 	"flag"
 	"io"
-	"log"
 	"net/http"
 	"os"
 
@@ -47,19 +46,20 @@ func main() {
 	}
 
 	if tlsCAFile != nil && tlsCertFile != nil && tlsKeyFile != nil {
+		logrus.Info("TLS enabled")
 		cp := x509.NewCertPool()
 		b, err := os.ReadFile(*tlsCAFile)
 		if err != nil {
-			log.Fatalf("Error reading CA file: %s", err)
+			logrus.Fatalf("Error reading CA file: %s", err)
 		}
 
 		if !cp.AppendCertsFromPEM(b) {
-			log.Fatalf("Error appending certs from PEM")
+			logrus.Fatalf("Error appending certs from PEM")
 		}
 
 		cert, err := tls.LoadX509KeyPair(*tlsCertFile, *tlsKeyFile)
 		if err != nil {
-			log.Fatalf("Error loading X509 key pair: %s", err)
+			logrus.Fatalf("Error loading X509 key pair: %s", err)
 		}
 
 		tlsConfig := &tls.Config{
@@ -72,7 +72,7 @@ func main() {
 		server.TLSConfig = tlsConfig
 	}
 
-	log.Fatal(server.ListenAndServe())
+	logrus.Fatal(server.ListenAndServe())
 }
 
 func getLogFile(w http.ResponseWriter, r *http.Request) {