fix

src/main/java/edu/kit/scc/Utils.java

@@ -5,6 +5,7 @@ import java.io.InputStream;
 import java.util.Map.Entry;
 import java.util.Properties;
 
+import org.apache.commons.codec.binary.Base64;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
@@ -15,6 +16,10 @@ public final class Utils {
 	private Utils() {
 	}
 
+	public static String encodeBase64(String string) {
+		return new String(Base64.encodeBase64(string.getBytes()));
+	}
+
 	public static Properties loadProperties() {
 		InputStream in = null;
 		Properties properties = new Properties();

src/main/java/edu/kit/scc/http/HttpClient.java

@@ -10,7 +10,6 @@ import java.security.NoSuchAlgorithmException;
 import java.security.SecureRandom;
 import java.security.cert.X509Certificate;
 import java.util.ArrayList;
-import java.util.Base64;
 import java.util.List;
 
 import javax.net.ssl.SSLContext;
@@ -41,6 +40,8 @@ import org.slf4j.LoggerFactory;
 
 import com.google.common.io.ByteStreams;
 
+import edu.kit.scc.Utils;
+
 /**
  * HTTP client implementation.
  * 
@@ -86,7 +87,7 @@ public class HttpClient {
 			urlConnection.setRequestProperty("Accept", "*/*");
 
 			if (user != null && !user.isEmpty()) {
-				String value = Base64.getEncoder().encodeToString((user + ":" + password).getBytes());
+				String value = Utils.encodeBase64(user + ":" + password);
 				log.debug("Authorization: Basic {}", value);
 				urlConnection.setRequestProperty("Authorization", "Basic " + value);
 			}
@@ -154,7 +155,7 @@ public class HttpClient {
 			urlConnection.setDoOutput(true);
 
 			if (user != null && !user.isEmpty()) {
-				String value = Base64.getEncoder().encodeToString((user + ":" + password).getBytes());
+				String value = Utils.encodeBase64(user + ":" + password);
 				log.debug("Authorization: Basic {}", value);
 				urlConnection.setRequestProperty("Authorization", "Basic " + value);
 			}

src/main/java/edu/kit/scc/http/HttpsClient.java

@@ -3,7 +3,6 @@ package edu.kit.scc.http;
 import java.io.IOException;
 import java.io.InputStream;
 import java.io.OutputStream;
-import java.util.Base64;
 
 import javax.net.ssl.HttpsURLConnection;
 
@@ -12,6 +11,8 @@ import org.slf4j.LoggerFactory;
 
 import com.google.common.io.ByteStreams;
 
+import edu.kit.scc.Utils;
+
 /**
  * HTTPS client implementation.
  * 
@@ -57,7 +58,7 @@ public class HttpsClient {
 			urlConnection.setRequestProperty("Accept", "*/*");
 
 			if (user != null && !user.isEmpty()) {
-				String value = Base64.getEncoder().encodeToString((user + ":" + password).getBytes());
+				String value = Utils.encodeBase64(user + ":" + password);
 				log.debug("Authorization: Basic {}", value);
 				urlConnection.setRequestProperty("Authorization", "Basic " + value);
 			}
@@ -126,7 +127,7 @@ public class HttpsClient {
 			urlConnection.setDoOutput(true);
 
 			if (user != null && !user.isEmpty()) {
-				String value = Base64.getEncoder().encodeToString((user + ":" + password).getBytes());
+				String value = Utils.encodeBase64(user + ":" + password);
 				log.debug("Authorization: Basic {}", value);
 				urlConnection.setRequestProperty("Authorization", "Basic " + value);
 			}