Allow 'java -jar' to work with signed nested jars

Fix RandomAccessJarFile to correctly read certificate information as
jar entries are loaded. This change allows signed nested jars to be
used as JCE providers.

spring-boot-tools/spring-boot-loader/src/test/java/org/springframework/boot/loader/data/ByteArrayRandomAccessDataTest.java

@@ -0,0 +1,49 @@
+/*
+ * Copyright 2012-2013 the original author or authors.
+ *
+ * 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 org.springframework.boot.loader.data;
+
+import org.junit.Test;
+import org.springframework.util.FileCopyUtils;
+
+import static org.hamcrest.Matchers.equalTo;
+import static org.junit.Assert.assertThat;
+
+/**
+ * Tests for {@link ByteArrayRandomAccessData}.
+ * 
+ * @author Phillip Webb
+ */
+public class ByteArrayRandomAccessDataTest {
+
+	@Test
+	public void testGetInputStream() throws Exception {
+		byte[] bytes = new byte[] { 0, 1, 2, 3, 4, 5 };
+		RandomAccessData data = new ByteArrayRandomAccessData(bytes);
+		assertThat(FileCopyUtils.copyToByteArray(data.getInputStream()), equalTo(bytes));
+		assertThat(data.getSize(), equalTo((long) bytes.length));
+	}
+
+	@Test
+	public void testGetSubsection() throws Exception {
+		byte[] bytes = new byte[] { 0, 1, 2, 3, 4, 5 };
+		RandomAccessData data = new ByteArrayRandomAccessData(bytes);
+		data = data.getSubsection(1, 4).getSubsection(1, 2);
+		assertThat(FileCopyUtils.copyToByteArray(data.getInputStream()),
+				equalTo(new byte[] { 2, 3 }));
+		assertThat(data.getSize(), equalTo(2L));
+	}
+}

spring-boot-tools/spring-boot-loader/src/test/java/org/springframework/boot/loader/jar/RandomAccessDataJarInputStreamTests.java

@@ -32,15 +32,15 @@ import org.junit.Rule;
 import org.junit.Test;
 import org.junit.rules.TemporaryFolder;
 import org.springframework.boot.loader.data.RandomAccessDataFile;
-import org.springframework.boot.loader.jar.RandomAccessDataZipEntry;
-import org.springframework.boot.loader.jar.RandomAccessDataZipInputStream;
+import org.springframework.boot.loader.jar.RandomAccessDataJarEntry;
+import org.springframework.boot.loader.jar.RandomAccessDataJarInputStream;
 
 /**
- * Tests for {@link RandomAccessDataZipInputStream}.
+ * Tests for {@link RandomAccessDataJarInputStream}.
  * 
  * @author Phillip Webb
  */
-public class RandomAccessDataZipInputStreamTests {
+public class RandomAccessDataJarInputStreamTests {
 
 	@Rule
 	public TemporaryFolder temporaryFolder = new TemporaryFolder();
@@ -76,11 +76,11 @@ public class RandomAccessDataZipInputStreamTests {
 
 	@Test
 	public void entryData() throws Exception {
-		RandomAccessDataZipInputStream z = new RandomAccessDataZipInputStream(
+		RandomAccessDataJarInputStream z = new RandomAccessDataJarInputStream(
 				new RandomAccessDataFile(file));
 		try {
-			RandomAccessDataZipEntry entry1 = z.getNextEntry();
-			RandomAccessDataZipEntry entry2 = z.getNextEntry();
+			RandomAccessDataJarEntry entry1 = z.getNextEntry();
+			RandomAccessDataJarEntry entry2 = z.getNextEntry();
 			assertThat(entry1.getName(), equalTo("a"));
 			assertThat(entry1.getData().getSize(), equalTo(10L));
 			assertThat(entry2.getName(), equalTo("b"));

spring-boot-tools/spring-boot-loader/src/test/java/org/springframework/boot/loader/jar/RandomAccessJarFileTests.java

@@ -25,6 +25,7 @@ import java.net.URL;
 import java.util.Enumeration;
 import java.util.jar.JarEntry;
 import java.util.jar.JarFile;
+import java.util.jar.Manifest;
 import java.util.zip.ZipEntry;
 
 import org.junit.Before;
@@ -91,6 +92,13 @@ public class RandomAccessJarFileTests {
 				equalTo("j1"));
 	}
 
+	@Test
+	public void getManifestEntry() throws Exception {
+		ZipEntry entry = this.jarFile.getJarEntry("META-INF/MANIFEST.MF");
+		Manifest manifest = new Manifest(this.jarFile.getInputStream(entry));
+		assertThat(manifest.getMainAttributes().getValue("Built-By"), equalTo("j1"));
+	}
+
 	@Test
 	public void getEntries() throws Exception {
 		Enumeration<JarEntry> entries = this.jarFile.entries();