fixed code formatting issues and added copyright header

acme4j-client/src/main/java/org/shredzone/acme4j/CertificateURIs.java

@@ -1,3 +1,16 @@
+/*
+ * acme4j - Java ACME client
+ *
+ * Copyright (C) 2015 Richard "Shred" Körber
+ *   http://acme4j.shredzone.org
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ *
+ * 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.
+ */
 package org.shredzone.acme4j;
 
 import java.net.URI;
@@ -14,8 +27,8 @@ public class CertificateURIs {
     private final URI chainCertUri;
 
     public CertificateURIs(URI certUri, URI chainCertUri) {
-	this.certUri = certUri;
+        this.certUri = certUri;
-	this.chainCertUri = chainCertUri;
+        this.chainCertUri = chainCertUri;
     }
 
     /**
@@ -25,7 +38,7 @@ public class CertificateURIs {
      * 		{@link URI} the certificate can be downloaded from
      */
     public URI getCertUri() {
-	return certUri;
+        return certUri;
     }
 
     /**
@@ -35,7 +48,7 @@ public class CertificateURIs {
      * 		{@link URI} the certificate chain can be downloaded from
      */
     public URI getChainCertUri() {
-	return chainCertUri;
+        return chainCertUri;
     }
 
 }

acme4j-client/src/main/java/org/shredzone/acme4j/impl/AbstractAcmeClient.java

@@ -28,7 +28,11 @@ import java.util.Map;
 import org.jose4j.jwk.PublicJsonWebKey;
 import org.jose4j.jws.JsonWebSignature;
 import org.jose4j.lang.JoseException;
-import org.shredzone.acme4j.*;
+import org.shredzone.acme4j.AcmeClient;
+import org.shredzone.acme4j.Authorization;
+import org.shredzone.acme4j.CertificateURIs;
+import org.shredzone.acme4j.Registration;
+import org.shredzone.acme4j.Status;
 import org.shredzone.acme4j.challenge.Challenge;
 import org.shredzone.acme4j.connector.Connection;
 import org.shredzone.acme4j.connector.Resource;
@@ -440,32 +444,31 @@ public abstract class AbstractAcmeClient implements AcmeClient {
 
     @Override
     public X509Certificate[] downloadCertificateChain(URI chainCertUri) throws AcmeException {
-    	if (chainCertUri == null) {
+        if (chainCertUri == null) {
-    		throw new NullPointerException("certChainUri must not be null"); 
+            throw new NullPointerException("certChainUri must not be null");
-    	}
+       }
 
-    	LOG.debug("getCertificateChain");
+        LOG.debug("getCertificateChain");
 
-    	List<X509Certificate> certChain = new ArrayList<>();
+        List<X509Certificate> certChain = new ArrayList<>();
-    	URI link = chainCertUri;
+        URI link = chainCertUri;
-    	while (link != null && certChain.size() < MAX_CHAIN_LENGTH) {    		
+        while (link != null && certChain.size() < MAX_CHAIN_LENGTH) {
-    		try (Connection conn = createConnection()) {
+            try (Connection conn = createConnection()) {
-    			int rc = conn.sendRequest(chainCertUri);
+                int rc = conn.sendRequest(chainCertUri);
-    			if (rc != HttpURLConnection.HTTP_OK) {
+                if (rc != HttpURLConnection.HTTP_OK) {
-    				conn.throwAcmeException();
+                    conn.throwAcmeException();
-    			}
+                }
 
-    			certChain.add(conn.readCertificate());
+                certChain.add(conn.readCertificate());
-    			link = conn.getLink("up");
+                link = conn.getLink("up");
-    		} catch (IOException ex) {
+                } catch (IOException ex) {
-    			throw new AcmeNetworkException(ex);
+                    throw new AcmeNetworkException(ex);
-    		}
+                }
-    	}
+            }
+        if (link != null)
+            throw new AcmeException("Recursion limit reached (" + MAX_CHAIN_LENGTH + "). Didn't get " + link);
 
-    	if (link != null)
+        return certChain.toArray(new X509Certificate[certChain.size()]);
-    		throw new AcmeException("Recursion limit reached (" + MAX_CHAIN_LENGTH + "). Didn't get " + link);
-
-    	return certChain.toArray(new X509Certificate[certChain.size()]);
     }
 
     @Override

acme4j-client/src/test/java/org/shredzone/acme4j/impl/AbstractAcmeClientTest.java

@@ -459,8 +459,7 @@ public class AbstractAcmeClientTest {
     @Test
     public void testRequestCertificate() throws AcmeException, IOException {
         Connection connection = new DummyConnection() {
-
+            @Override
-	    @Override
             public int sendSignedRequest(URI uri, ClaimBuilder claims, Session session, Registration registration) {
                 assertThat(uri, is(resourceUri));
                 assertThat(claims.toString(), sameJSONAs(getJson("requestCertificateRequest")));

acme4j-example/src/main/java/org/shredzone/acme4j/ClientTest.java

@@ -18,7 +18,6 @@ import java.io.FileReader;
 import java.io.FileWriter;
 import java.io.IOException;
 import java.io.Writer;
-import java.net.URI;
 import java.security.KeyPair;
 import java.security.Security;
 import java.security.cert.X509Certificate;
@@ -51,6 +50,7 @@ public class ClientTest {
     private static final File USER_KEY_FILE = new File("user.key");
     private static final File DOMAIN_KEY_FILE = new File("domain.key");
     private static final File DOMAIN_CERT_FILE = new File("domain.crt");
+    private static final File CERT_CHAIN_FILE = new File("chain.crt");
     private static final File DOMAIN_CSR_FILE = new File("domain.csr");
 
     private static final int KEY_SIZE = 2048;
@@ -176,16 +176,23 @@ public class ClientTest {
         }
 
         // Request a signed certificate
-        URI certificateUri = client.requestCertificate(reg, csrb.getEncoded());
+        CertificateURIs certificateUris = client.requestCertificate(reg, csrb.getEncoded());
         LOG.info("Success! The certificate for domains " + domains + " has been generated!");
-        LOG.info("Certificate URI: " + certificateUri);
+        LOG.info("Certificate URI: " + certificateUris.getCertUri());
+        LOG.info("Certificate Chain URI: " + certificateUris.getChainCertUri());
 
         // Download the certificate
-        X509Certificate cert = client.downloadCertificate(certificateUri);
+        X509Certificate cert = client.downloadCertificate(certificateUris.getCertUri());
         try (FileWriter fw = new FileWriter(DOMAIN_CERT_FILE)) {
             CertificateUtils.writeX509Certificate(cert, fw);
         }
 
+        // Download the certificate chain
+        X509Certificate[] chain = client.downloadCertificateChain(certificateUris.getChainCertUri());
+        try (FileWriter fw = new FileWriter(CERT_CHAIN_FILE)) {
+            CertificateUtils.writeX509CertificateChain(chain, fw);
+        }
+
         // Revoke the certificate (uncomment if needed...)
         // client.revokeCertificate(reg, cert);
     }

acme4j-utils/src/main/java/org/shredzone/acme4j/util/CertificateUtils.java

@@ -94,6 +94,21 @@ public final class CertificateUtils {
         }
     }
 
+    /**
+     * Writes an X.509 certificate chain PEM file.
+     *
+     * @param chain
+     *            {@link X509Certificate[]} to write
+     * @param w
+     *            {@link Writer} to write the PEM file to
+     */
+    public static void writeX509CertificateChain(X509Certificate[] chain, Writer w) throws IOException {
+        try (JcaPEMWriter jw = new JcaPEMWriter(w)) {
+            for (X509Certificate cert : chain)
+                jw.writeObject(cert);
+        }
+    }
+
     /**
      * Reads a CSR PEM file.
      *