Java tutorial
/** * Copyright (C) Posten Norge AS * * 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 no.difi.sdp.client.domain; import no.difi.sdp.client.domain.exceptions.SertifikatException; import org.apache.commons.codec.binary.Base64; import java.io.ByteArrayInputStream; import java.security.KeyStore; import java.security.KeyStoreException; import java.security.cert.*; public class Sertifikat { private X509Certificate x509Certificate; private Sertifikat(X509Certificate x509Certificate) { this.x509Certificate = x509Certificate; } public X509Certificate getX509Certificate() { return x509Certificate; } public byte[] getEncoded() { try { return x509Certificate.getEncoded(); } catch (CertificateEncodingException e) { throw new SertifikatException("Kunne ikke hente encoded utgave av sertifikatet", e); } } public static Sertifikat fraBase64X509String(String base64) { try { return lagSertifikat(Base64.decodeBase64(base64)); } catch (CertificateException e) { throw new SertifikatException("Kunne ikke lese sertifikat fra base64-streng", e); } } public static Sertifikat fraByteArray(byte[] certificate) { try { return lagSertifikat(certificate); } catch (CertificateException e) { throw new SertifikatException("Kunne ikke lese sertifikat fra byte array", e); } } public static Sertifikat fraCertificate(X509Certificate certificate) { return new Sertifikat(certificate); } public static Sertifikat fraKeyStore(KeyStore keyStore, String alias) { Certificate certificate; try { certificate = keyStore.getCertificate(alias); } catch (KeyStoreException e) { throw new SertifikatException("Klarte ikke lese sertifikat fra keystore", e); } if (certificate == null) { throw new SertifikatException( "Kunne ikke finne sertifikat i keystore. Er du sikker p at det er brukt keystore med et sertifikat og at du har oppgitt riktig alias?"); } if (!(certificate instanceof X509Certificate)) { throw new SertifikatException("Klienten sttter kun X509-sertifikater. Fikk sertifikat av typen " + certificate.getClass().getSimpleName()); } return new Sertifikat((X509Certificate) certificate); } private static Sertifikat lagSertifikat(byte[] certificate) throws CertificateException { X509Certificate x509Certificate = (X509Certificate) CertificateFactory.getInstance("X509") .generateCertificate(new ByteArrayInputStream(certificate)); return new Sertifikat(x509Certificate); } }