VpnService: use Credentials instead of CertTool.
diff --git a/packages/VpnServices/src/com/android/server/vpn/L2tpIpsecService.java b/packages/VpnServices/src/com/android/server/vpn/L2tpIpsecService.java
index 13b4952..9909905 100644
--- a/packages/VpnServices/src/com/android/server/vpn/L2tpIpsecService.java
+++ b/packages/VpnServices/src/com/android/server/vpn/L2tpIpsecService.java
@@ -17,7 +17,7 @@
 package com.android.server.vpn;
 
 import android.net.vpn.L2tpIpsecProfile;
-import android.security.CertTool;
+import android.security.Credentials;
 
 import java.io.IOException;
 
@@ -30,16 +30,18 @@
     @Override
     protected void connect(String serverIp, String username, String password)
             throws IOException {
+        L2tpIpsecProfile p = getProfile();
         // IPSEC
         DaemonProxy ipsec = startDaemon(IPSEC);
         ipsec.sendCommand(serverIp, L2tpService.L2TP_PORT,
-                getUserkeyPath(), getUserCertPath(), getCaCertPath());
+                Credentials.USER_PRIVATE_KEY + p.getUserCertificate(),
+                Credentials.USER_CERTIFICATE + p.getUserCertificate(),
+                Credentials.CA_CERTIFICATE + p.getCaCertificate());
         ipsec.closeControlSocket();
 
         sleep(2000); // 2 seconds
 
         // L2TP
-        L2tpIpsecProfile p = getProfile();
         MtpdHelper.sendCommand(this, L2tpService.L2TP_DAEMON, serverIp,
                 L2tpService.L2TP_PORT,
                 (p.isSecretEnabled() ? p.getSecretString() : null),
@@ -51,19 +53,4 @@
         stopDaemon(IPSEC);
         stopDaemon(MtpdHelper.MTPD);
     }
-
-    private String getCaCertPath() {
-        return CertTool.getInstance().getCaCertificate(
-                getProfile().getCaCertificate());
-    }
-
-    private String getUserCertPath() {
-        return CertTool.getInstance().getUserCertificate(
-                getProfile().getUserCertificate());
-    }
-
-    private String getUserkeyPath() {
-        return CertTool.getInstance().getUserPrivateKey(
-                getProfile().getUserCertificate());
-    }
 }