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/*
This file is part of GNUnet.
(C) 2012, 2013 Christian Grothoff (and other contributing authors)
GNUnet is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published
by the Free Software Foundation; either version 3, or (at your
option) any later version.
GNUnet 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. See the GNU
General Public License for more details.
You should have received a copy of the GNU General Public License
along with GNUnet; see the file COPYING. If not, write to the
Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA.
*/
package org.gnunet.util.crypto;
import org.gnunet.construct.Construct;
import org.gnunet.construct.Message;
import org.gnunet.construct.NestedMessage;
/**
* A message together with a signature on the message and its purpose.
*/
public class EcdsaSignedMessage<M extends SignedContentMessage> implements Message {
@NestedMessage
public EcdsaSignature signature;
@NestedMessage(newFrame = true)
public ContentWithPurposeMessage<M> cpm;
public EcdsaSignedMessage() {
// empty constructor required by org.gnunet.construct
}
public boolean verify(EcdsaPublicKey signerPublicKey, Class<? extends SignedContentMessage> expectedClass) {
if (!expectedClass.isInstance(cpm.m)) {
return false;
}
System.out.println("right class");
byte[] data = Construct.toBinary(cpm);
return signature.verifyRaw(data, signerPublicKey);
}
public EcdsaSignedMessage(M message, EcdsaPrivateKey privateKey,
EcdsaPublicKey publicKey) {
cpm = new ContentWithPurposeMessage();
cpm.m = message;
Construct.patch(cpm);
byte[] data = Construct.toBinary(cpm);
signature = privateKey.signRaw(publicKey, data);
}
public EcdsaSignedMessage(M message, EcdsaPrivateKey privateKey) {
this(message, privateKey, privateKey.getPublicKey());
}
public M get() {
return cpm.m;
}
}
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