Java tutorial
package de.fichtelmax.asn1; /* * #%L * asn1-printer * %% * Copyright (C) 2013 Max Fichtelmann * %% * This program is free software: you can redistribute it and/or modify * it under the terms of the GNU Lesser General Public License as * published by the Free Software Foundation, either version 3 of the * License, or (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Lesser Public License for more details. * * You should have received a copy of the GNU General Lesser Public * License along with this program. If not, see * <http://www.gnu.org/licenses/lgpl-3.0.html>. * #L% */ import static org.mockito.Matchers.contains; import static org.mockito.Mockito.*; import java.io.IOException; import java.io.PrintStream; import java.security.cert.CertificateException; import java.util.Arrays; import org.apache.commons.io.IOUtils; import org.bouncycastle.asn1.ASN1Encodable; import org.bouncycastle.asn1.DERInteger; import org.bouncycastle.asn1.DERObjectIdentifier; import org.bouncycastle.asn1.DERSequence; import org.bouncycastle.asn1.DERSet; import org.bouncycastle.asn1.DERUTF8String; import org.junit.Before; import org.junit.Test; import org.mockito.Mock; import org.mockito.MockitoAnnotations; import de.fichtelmax.asn1.ber.BERParser; public class ASN1PrinterTest { ASN1Printer cut; @Mock PrintStream out; @Before public void setup() { MockitoAnnotations.initMocks(this); cut = new ASN1Printer(out, BERParser.DEFAULT); } @Test public void printSequence() throws IOException { String text = "Hello World!"; String oid = "1.2.3.45.10982345"; long number = 12345678901l; DERUTF8String string = new DERUTF8String(text); DERObjectIdentifier objectIdentifier = new DERObjectIdentifier(oid); DERInteger integer = new DERInteger(number); DERSet set = new DERSet(new ASN1Encodable[] { objectIdentifier, integer }); DERSequence sequence = new DERSequence(new ASN1Encodable[] { string, set }); cut.print(sequence.getEncoded()); verify(out).println(contains(text)); verify(out).println(contains(oid)); verify(out).println(contains(Long.toString(number))); } @Test public void printX509() throws IOException, CertificateException { byte[] x509Bytes = IOUtils.toByteArray(ASN1Printer.class.getResourceAsStream("/certificate.crt")); cut.print(x509Bytes); verify(out, never()).println(ASN1Printer.INCOMPLETE_MESSAGE); } @Test public void printHalfX509() throws IOException, CertificateException { byte[] x509Bytes = IOUtils.toByteArray(ASN1Printer.class.getResourceAsStream("/certificate.crt")); x509Bytes = Arrays.copyOfRange(x509Bytes, 0, x509Bytes.length / 2); cut.print(x509Bytes); verify(out).println(ASN1Printer.INCOMPLETE_MESSAGE); } }