public String verify(JarFile jar, String... algorithms) throws IOException {
if (algorithms == null || algorithms.length == 0) algorithms = new String[] {"MD5", "SHA"};
else if (algorithms.length == 1 && algorithms[0].equals("-")) return null;
try {
Manifest m = jar.getManifest();
if (m.getEntries().isEmpty()) return "No name sections";
for (Enumeration<JarEntry> e = jar.entries(); e.hasMoreElements(); ) {
JarEntry je = e.nextElement();
if (MANIFEST_ENTRY.matcher(je.getName()).matches()) continue;
Attributes nameSection = m.getAttributes(je.getName());
if (nameSection == null) return "No name section for " + je.getName();
for (String algorithm : algorithms) {
try {
MessageDigest md = MessageDigest.getInstance(algorithm);
String expected = nameSection.getValue(algorithm + "-Digest");
if (expected != null) {
byte digest[] = Base64.decodeBase64(expected);
copy(jar.getInputStream(je), md);
if (!Arrays.equals(digest, md.digest()))
return "Invalid digest for "
+ je.getName()
+ ", "
+ expected
+ " != "
+ Base64.encodeBase64(md.digest());
} else reporter.error("could not find digest for " + algorithm + "-Digest");
} catch (NoSuchAlgorithmException nsae) {
return "Missing digest algorithm " + algorithm;
}
}
}
} catch (Exception e) {
return "Failed to verify due to exception: " + e.getMessage();
}
return null;
}
public Image getImage(String sImage) {
Image imReturn = null;
try {
if (jar == null) {
imReturn = this.toolkit.createImage(this.getClass().getClassLoader().getResource(sImage));
} else {
//
BufferedInputStream bis = new BufferedInputStream(jar.getInputStream(jar.getEntry(sImage)));
ByteArrayOutputStream buffer = new ByteArrayOutputStream(4096);
int b;
while ((b = bis.read()) != -1) {
buffer.write(b);
}
byte[] imageBuffer = buffer.toByteArray();
imReturn = this.toolkit.createImage(imageBuffer);
bis.close();
buffer.close();
}
} catch (IOException ex) {
}
return imReturn;
}
private InputStream getResourceStream(final File file, final String resourceName) {
try {
JarFile jarFile = this.jarFiles.get(file);
if (jarFile == null && file.isDirectory()) {
final File resource = new File(file, resourceName);
if (resource.exists()) {
return new FileInputStream(resource);
}
} else {
if (jarFile == null) {
if (!file.exists()) {
return null;
}
jarFile = new JarFile(file);
this.jarFiles.put(file, jarFile);
jarFile = this.jarFiles.get(file);
}
final JarEntry entry = jarFile.getJarEntry(resourceName);
if (entry != null) {
return jarFile.getInputStream(entry);
}
}
} catch (Exception e) {
this.log(
"Ignoring Exception "
+ e.getClass().getName()
+ ": "
+ e.getMessage()
+ " reading resource "
+ resourceName
+ " from "
+ file,
3);
}
return null;
}
