| /* |
| * Copyright (C) 2018 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package com.android.server.wifi.hotspot2; |
| |
| import android.util.Log; |
| |
| import java.io.File; |
| import java.io.FileInputStream; |
| import java.io.IOException; |
| import java.security.cert.Certificate; |
| import java.security.cert.CertificateException; |
| import java.security.cert.CertificateFactory; |
| import java.security.cert.X509Certificate; |
| import java.util.HashSet; |
| import java.util.Set; |
| |
| /** |
| * Provides static method to build certificate set from cert files |
| */ |
| public class WfaCertBuilder { |
| |
| private static final String TAG = "PasspointWfaCertBuilder"; |
| |
| /** |
| * Returns a set of X509 Certificates from a set of WFA cert files |
| * @param directory the location where the cert files are stored |
| * @return Set<X509Certificate> certificates obtained from the files |
| */ |
| public static Set<X509Certificate> loadCertsFromDisk(String directory) { |
| Set<X509Certificate> certs = new HashSet<>(); |
| try { |
| File certDir = new File(directory); |
| File[] certFiles = certDir.listFiles(); |
| if (certFiles == null || certFiles.length <= 0) { |
| return certs; |
| } |
| CertificateFactory certFactory = CertificateFactory.getInstance("X.509"); |
| for (File certFile : certFiles) { |
| FileInputStream fis = new FileInputStream(certFile); |
| Certificate cert = certFactory.generateCertificate(fis); |
| if (cert instanceof X509Certificate) { |
| certs.add((X509Certificate) cert); |
| } |
| fis.close(); |
| } |
| } catch (CertificateException | IOException | SecurityException e) { |
| Log.e(TAG, "Unable to read cert " + e.getMessage()); |
| } |
| return certs; |
| } |
| } |