2004-09-06 jrandom

* Address a race condition in the key management code that would manifest
      itself as a corrupt router identity.
    * Properly clear old transport addresses from being displayed on the old
      console after soft restarts.
    * Properly refuse to load the client applications more than once in the
      same JVM.
    * Added support for a graceful restart (a graceful shutdown followed by a
      full JVM restart - useful for restarting client apps).
    * More defensive programming, HTML cleanup, logging
    * wrapper.config cleanup of duplicate lines

core/java/src/net/i2p/data/RouterInfo.java

@@ -221,6 +221,7 @@ public class RouterInfo extends DataStructureImpl {
         if (bytes == null) throw new DataFormatException("Not enough data to sign");
         // now sign with the key 
         Signature sig = DSAEngine.getInstance().sign(bytes, key);
+        if (sig == null) throw new DataFormatException("Not enough data to sign, or other signature failure");
         setSignature(sig);
         //_log.debug("Signed " + SHA256Generator.getInstance().calculateHash(bytes).toBase64() + " with " + key);
         //_log.debug("verify ok? " + DSAEngine.getInstance().verifySignature(sig, bytes, getIdentity().getSigningPublicKey()));