Java tutorial
//package com.java2s; import java.io.IOException; import java.io.InputStream; import java.security.KeyStore; import java.security.KeyStoreException; import java.security.NoSuchAlgorithmException; import java.security.cert.CertificateException; import java.security.cert.CertificateFactory; import javax.net.ssl.TrustManager; import javax.net.ssl.TrustManagerFactory; public class Main { private static TrustManager[] prepareTrustManager(InputStream... certificates) { if (certificates == null || certificates.length <= 0) return null; try { CertificateFactory certificateFactory = CertificateFactory.getInstance("X.509"); KeyStore keyStore = KeyStore.getInstance(KeyStore.getDefaultType()); keyStore.load(null); int index = 0; for (InputStream certificate : certificates) { String certificateAlias = Integer.toString(index++); keyStore.setCertificateEntry(certificateAlias, certificateFactory.generateCertificate(certificate)); try { if (certificate != null) certificate.close(); } catch (IOException e) { } } TrustManagerFactory trustManagerFactory = null; trustManagerFactory = TrustManagerFactory.getInstance(TrustManagerFactory.getDefaultAlgorithm()); trustManagerFactory.init(keyStore); TrustManager[] trustManagers = trustManagerFactory.getTrustManagers(); return trustManagers; } catch (NoSuchAlgorithmException e) { e.printStackTrace(); } catch (CertificateException e) { e.printStackTrace(); } catch (KeyStoreException e) { e.printStackTrace(); } catch (Exception e) { e.printStackTrace(); } return null; } }