ch.epfl.dedis.lib.darc

Class DarcSignature

java.lang.Object

ch.epfl.dedis.lib.darc.DarcSignature

public class DarcSignature
extends Object

Constructor Summary

Constructors

Constructor and Description
DarcSignature(byte[] msg, Darc darc, Signer signer, int role)
DarcSignature(byte[] msg, SignaturePath path, Signer signer) This will return a new DarcSignature by the signer on the message.
DarcSignature(DarcOCSProto.Signature proto) Recreates a darc from a protobuf representation.

Method Summary

Modifier and Type	Method and Description
boolean	equals(Object other)
SignaturePath	getPath() Returns the stored path in the signature.
DarcOCSProto.Signature	toProto() Returns the protobuf representation of the signature.
boolean	verify(byte[] msg, Darc base) Returns true if the signature verification is OK, false on an error.

Methods inherited from class java.lang.Object

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

Constructor Detail

DarcSignature

public DarcSignature(byte[] msg,
                     SignaturePath path,
                     Signer signer)
              throws CothorityCryptoException

This will return a new DarcSignature by the signer on the message. It will include all paths of the signer present in the signature. The signed message is the sha-256 of the path concatenated with the msg: sha256( path.getPathMsg() + msg )

Parameters:

msg -

path -

signer -

Throws:

CothorityCryptoException

DarcSignature

public DarcSignature(byte[] msg,
                     Darc darc,
                     Signer signer,
                     int role)
              throws CothorityCryptoException

Throws:

CothorityCryptoException

DarcSignature

public DarcSignature(DarcOCSProto.Signature proto)
              throws CothorityCryptoException

Recreates a darc from a protobuf representation.

Throws:

CothorityCryptoException

Method Detail

getPath

public SignaturePath getPath()

Returns the stored path in the signature.

Returns:

verify

public boolean verify(byte[] msg,
                      Darc base)
               throws CothorityCryptoException

Returns true if the signature verification is OK, false on an error. The base argument is the starting darc that is known to the document or the skipchain-configuration.

Parameters:

msg -

base -

Returns:

Throws:

CothorityCryptoException

toProto

public DarcOCSProto.Signature toProto()

Returns the protobuf representation of the signature.

Returns:

equals

public boolean equals(Object other)

Overrides:

equals in class Object