ostore.security
Class SignedQSTree

java.lang.Object
  |
  +--ostore.security.SignedQS
        |
        +--ostore.security.SignedQSTree

All Implemented Interfaces:

QuickSerializable

Direct Known Subclasses:

ThresholdSignedQSTree

public class SignedQSTree

extends SignedQS

SignedQSTree

Version:

$Id: SignedQSTree.java,v 1.15 2002/08/16 00:00:09 srhea Exp $

Author:

Sean C. Rhea

Nested Class Summary

static class

SignedQSTree.Root

Nested classes inherited from class ostore.security.SignedQS

SignedQS.SignatureBuffer

Field Summary

protected QSArray

_elts

Fields inherited from class ostore.security.SignedQS

_qs_signature, _qs_signature_type, _signature, _user_data

Constructor Summary

protected	SignedQSTree()
	SignedQSTree(InputBuffer buffer)
	SignedQSTree(QSArray elts, QSSignature qs_signature, PrivateKey privkey, SecureRandom random, Signature engine)

Method Summary

static SignedQSTree.Root	compute_root(QSArray elts)
static SecureHash[]	compute_tree(QSArray elts)
static void	main(String[] args) Test harness for SignedQS.
static int	next_highest_power_of_two(int i)
void	serialize(OutputBuffer buffer) Add the object to the buffer.
String	toString()
QuickSerializable	user_data() The data which this object signs.
boolean	verify(PublicKey pubkey, Signature engine) Verify that the signature over user_data() is valid.

Methods inherited from class ostore.security.SignedQS

init, init, qs_signature, verify

Methods inherited from class java.lang.Object

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

Field Detail

_elts

protected QSArray _elts

Constructor Detail

SignedQSTree

protected SignedQSTree()

SignedQSTree

public SignedQSTree(QSArray elts,
                    QSSignature qs_signature,
                    PrivateKey privkey,
                    SecureRandom random,
                    Signature engine)
             throws InvalidKeyException,
                    SignatureException

SignedQSTree

public SignedQSTree(InputBuffer buffer)
             throws QSException

Method Detail

next_highest_power_of_two

public static int next_highest_power_of_two(int i)

compute_tree

public static SecureHash[] compute_tree(QSArray elts)

compute_root

public static SignedQSTree.Root compute_root(QSArray elts)

user_data

public QuickSerializable user_data()

Description copied from class: SignedQS

The data which this object signs. Please see the note about this in (QuickSerializable, KeyPair, SecureRandom, Signature). Also, note that SignedQS.verify(java.security.PublicKey, java.security.Signature) should be called to verify that the signature is correct.

Overrides:

user_data in class SignedQS

Returns:

the data which is signed

serialize

public void serialize(OutputBuffer buffer)

Description copied from interface: QuickSerializable

Add the object to the buffer.

Specified by:

serialize in interface QuickSerializable

Overrides:

serialize in class SignedQS

Parameters:

buffer - the output buffer to add the object to

verify

public boolean verify(PublicKey pubkey,
                      Signature engine)
               throws InvalidKeyException,
                      SignatureException,
                      TypeTable.NoSuchTypeCode

Description copied from class: SignedQS

Verify that the signature over SignedQS.user_data() is valid.

Overrides:

verify in class SignedQS

Parameters:

pubkey - The public key of the alleged signer of this message.

engine - a signature generating engine such that

provider  ().equals (engine.getProvider ().getName ())

and

algorithm ().equals (engine.getAlgorithm ())

These can be obtained through the function Signature.getInstance(String) or Signature.getInstance(String, String).

Returns:

true if the signature is valid, false otherwise

InvalidKeyException

SignatureException

TypeTable.NoSuchTypeCode

toString

public String toString()

Overrides:

toString in class SignedQS

main

public static void main(String[] args)
                 throws Exception

Description copied from class: SignedQS

Test harness for SignedQS.

Exception