ch.epfl.dedis.skipchain

Class ByzcoinSig

java.lang.Object

ch.epfl.dedis.skipchain.ByzcoinSig

public class ByzcoinSig
extends Object

ByzcoinSig represents a signature from the byzcoin-protocol. It holds both the message and the signature.

Constructor Summary

Constructors

Constructor and Description
ByzcoinSig(byte[] buf)
ByzcoinSig(com.google.protobuf.ByteString bs)
ByzcoinSig(SkipchainProto.ByzcoinSig bs)

Method Summary

Modifier and Type	Method and Description
byte[]	getMsg()
byte[]	getSignature()
boolean	verify(Roster roster) Verifies the signature given a roster of potential signers.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

ByzcoinSig

public ByzcoinSig(SkipchainProto.ByzcoinSig bs)

ByzcoinSig

public ByzcoinSig(byte[] buf)
           throws com.google.protobuf.InvalidProtocolBufferException

Throws:

com.google.protobuf.InvalidProtocolBufferException

ByzcoinSig

public ByzcoinSig(com.google.protobuf.ByteString bs)
           throws com.google.protobuf.InvalidProtocolBufferException

Throws:

com.google.protobuf.InvalidProtocolBufferException

Method Detail

verify

public boolean verify(Roster roster)

Verifies the signature given a roster of potential signers.

Parameters:

roster - a list of signers

Returns:

true if the signature is correct, false otherwise

getMsg

public byte[] getMsg()

Returns:

the signed message, it's a sha256 hash of the actual message.

getSignature

public byte[] getSignature()

Returns:

the aggregated schnorr signature on the message, plus a filter to indicate which nodes signed.