public static ExtendedKeyStore readKeyRing(String filename) {
ExtendedKeyStore ring = null;
try {
FileInputStream in = new FileInputStream(filename);
ring = (ExtendedKeyStore) ExtendedKeyStore.getInstance("OpenPGP/KeyRing");
ring.load(in, null);
in.close();
} catch (IOException ioe) {
System.err.println(
"IOException... You did remember to run the "
+ "GenerateAndWriteKey example first, right?");
ioe.printStackTrace();
System.exit(-1);
} catch (NoSuchAlgorithmException nsae) {
System.err.println(
"Cannot find the OpenPGP KeyRing. "
+ "This usually means that the Cryptix OpenPGP provider is not "
+ "installed correctly.");
nsae.printStackTrace();
System.exit(-1);
} catch (KeyStoreException kse) {
System.err.println("Reading keyring failed.");
kse.printStackTrace();
System.exit(-1);
} catch (CertificateException ce) {
System.err.println("Reading keyring failed.");
ce.printStackTrace();
System.exit(-1);
}
return ring;
}
public static void writeMsg() {
Message msg = null;
try {
String data = "This is a test message.\n" + "This is another line.\n";
LiteralMessageBuilder lmb = LiteralMessageBuilder.getInstance("OpenPGP");
lmb.init(data);
msg = lmb.build();
} catch (NoSuchAlgorithmException nsae) {
System.err.println(
"Cannot find the OpenPGP LiteralMessageBuilder."
+ " This usually means that the Cryptix OpenPGP provider is not "
+ "installed correctly.");
nsae.printStackTrace();
System.exit(-1);
} catch (MessageException me) {
System.err.println("Creating the literal message failed.");
me.printStackTrace();
System.exit(-1);
}
// **********************************************************************
// Sign the message.
//
// Note that signing usually comes before encryption, such that
// unauthorized parties cannot see who signed the message.
// **********************************************************************
try {
SignedMessageBuilder smb = SignedMessageBuilder.getInstance("OpenPGP");
// use the following line for compatibility with older PGP versions
// SignedMessageBuilder smb =
// SignedMessageBuilder.getInstance("OpenPGP/V3");
smb.init(msg);
smb.addSigner(clientPrivateKey, "TestingPassphrase".toCharArray());
msg = smb.build();
} catch (NoSuchAlgorithmException nsae) {
System.err.println(
"Cannot find the OpenPGP SignedMessageBuilder. "
+ "This usually means that the Cryptix OpenPGP provider is not "
+ "installed correctly.");
nsae.printStackTrace();
System.exit(-1);
} catch (UnrecoverableKeyException uke) {
System.err.println("Incorrect passphrase.");
uke.printStackTrace();
System.exit(-1);
} catch (MessageException me) {
System.err.println("Generating the message failed.");
me.printStackTrace();
System.exit(-1);
}
// **********************************************************************
// Armour the message and write it to disk
// **********************************************************************
try {
PGPArmouredMessage armoured;
armoured = new PGPArmouredMessage(msg);
FileOutputStream out = new FileOutputStream("signed.asc");
out.write(armoured.getEncoded());
out.close();
} catch (MessageException me) {
System.err.println("Writing the encrypted message failed.");
me.printStackTrace();
System.exit(-1);
} catch (IOException ioe) {
System.err.println("Writing the encrypted message failed.");
ioe.printStackTrace();
System.exit(-1);
}
// **********************************************************************
// Encrypt the message.
// **********************************************************************
try {
EncryptedMessageBuilder emb = EncryptedMessageBuilder.getInstance("OpenPGP");
emb.init(msg);
emb.addRecipient(serverPublicKey);
msg = emb.build();
} catch (NoSuchAlgorithmException nsae) {
System.err.println(
"Cannot find the OpenPGP "
+ "EncryptedMessageBuilder. "
+ "This usually means that the Cryptix OpenPGP provider is not "
+ "installed correctly.");
nsae.printStackTrace();
System.exit(-1);
} catch (MessageException me) {
System.err.println("Creating the encrypted message failed.");
me.printStackTrace();
System.exit(-1);
}
// **********************************************************************
// Armour the message and write it to disk
// **********************************************************************
try {
PGPArmouredMessage armoured;
armoured = new PGPArmouredMessage(msg);
FileOutputStream out = new FileOutputStream("encrypted-signed.asc");
out.write(armoured.getEncoded());
out.close();
} catch (MessageException me) {
System.err.println("Writing the encrypted message failed.");
me.printStackTrace();
System.exit(-1);
} catch (IOException ioe) {
System.err.println("Writing the encrypted message failed.");
ioe.printStackTrace();
System.exit(-1);
}
}