infoservice.agreement.multicast.messages
Class CommitmentMessage

java.lang.Object
  infoservice.agreement.multicast.messages.CommitmentMessage

public class CommitmentMessage
extends java.lang.Object

Author:

agamemnon

Field Summary

private java.lang.String	m_proposal This variable contains the message itself e.g.
private java.lang.String	m_randomOne A random number as String.
private java.lang.String	m_randomTwo A second random number as String.
private char	m_separatorCharacter This character will be used for string concatenation.

Constructor Summary

CommitmentMessage()
Construct a CommitmentMessage.

CommitmentMessage(java.lang.String a_stringconcat)
Construct a CommitmentMessage.

Method Summary

private java.lang.String	concat(java.util.Vector a_strArray)
private java.util.Vector	deconcat(java.lang.String a_string)
private static java.util.Vector	deconcatenate(java.lang.String a_string)
static java.lang.String	extractHashFromHashAndRandomOneConcatenation(java.lang.String a_concat) Extracts the hash value from given random number and hash value concatenation.
static java.lang.String	extractRandomOneFromHashAndRandomOneConcatenation(java.lang.String a_concat) Extracts the first random number from given random number and hash value concatenation.
java.lang.String	getConcatenation() Creates a string concatenation using all existing variables seperated by m_separatorCharacter.
java.lang.String	getHashCode() Creates a unique hash code.
java.lang.String	getHashValueAndRandomOne() Creates a string concatenation using the hash code an the first random number seperated by m_separatorCharacter.
java.lang.String	getProposal() Get the message itself e.g.
java.lang.String	getRandomOne() Gets the first random value according to Bruce Schneiers commitment scheme.
java.lang.String	getRandomTwo() Gets the second random value according to Bruce Schneiers commitment scheme.
char	getSeparator() Gets the character used as seperator for string concatenation.
java.lang.String	toString() Creates a string representation of this object.

Methods inherited from class java.lang.Object

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

Field Detail

m_randomOne

private java.lang.String m_randomOne

A random number as String.

m_randomTwo

private java.lang.String m_randomTwo

A second random number as String.

m_proposal

private java.lang.String m_proposal

This variable contains the message itself e.g. "Hello"

m_separatorCharacter

private char m_separatorCharacter

This character will be used for string concatenation.

Constructor Detail

CommitmentMessage

public CommitmentMessage()

Construct a CommitmentMessage. All necessary values will be created automaticly.

CommitmentMessage

public CommitmentMessage(java.lang.String a_stringconcat)
                  throws javax.naming.directory.InvalidAttributesException

Construct a CommitmentMessage. All values are given as a concatenated string representation and will be parsed out.

Parameters:

a_stringconcat -

Throws:

javax.naming.directory.InvalidAttributesException

Method Detail

extractHashFromHashAndRandomOneConcatenation

public static java.lang.String extractHashFromHashAndRandomOneConcatenation(java.lang.String a_concat)
                                                                     throws javax.naming.directory.InvalidAttributesException

Extracts the hash value from given random number and hash value concatenation.

Parameters:

a_concat - Random number and hash value concatenation

Returns:

The hash value.

Throws:

javax.naming.directory.InvalidAttributesException

extractRandomOneFromHashAndRandomOneConcatenation

public static java.lang.String extractRandomOneFromHashAndRandomOneConcatenation(java.lang.String a_concat)
                                                                          throws javax.naming.directory.InvalidAttributesException

Extracts the first random number from given random number and hash value concatenation.

Parameters:

a_concat - Random number and hash value concatenation

Returns:

Random number one.

Throws:

javax.naming.directory.InvalidAttributesException

deconcatenate

private static java.util.Vector deconcatenate(java.lang.String a_string)

Parameters:

a_string - The string to deconcatenate.

Returns:

The result vector with substrings.

getConcatenation

public java.lang.String getConcatenation()

Creates a string concatenation using all existing variables seperated by m_separatorCharacter.

Returns:

The string concatenation.

getHashCode

public java.lang.String getHashCode()

Creates a unique hash code.

Returns:

The hash code.

getHashValueAndRandomOne

public java.lang.String getHashValueAndRandomOne()

Creates a string concatenation using the hash code an the first random number seperated by m_separatorCharacter.

Returns:

The string concatenation.

getProposal

public java.lang.String getProposal()

Get the message itself e.g. "Hello".

Returns:

The message.

getRandomOne

public java.lang.String getRandomOne()

Gets the first random value according to Bruce Schneiers commitment scheme.

Returns:

The first random value.

getRandomTwo

public java.lang.String getRandomTwo()

Gets the second random value according to Bruce Schneiers commitment scheme.

Returns:

THe second random value.

getSeparator

public char getSeparator()

Gets the character used as seperator for string concatenation.

Returns:

The seperator.

toString

public java.lang.String toString()

Creates a string representation of this object.

Overrides:

toString in class java.lang.Object

Returns:

The string representation.

concat

private java.lang.String concat(java.util.Vector a_strArray)

Parameters:

a_strArray - Vector with strings.

Returns:

The concatenation.

deconcat

private java.util.Vector deconcat(java.lang.String a_string)

Parameters:

a_string - The string to deconcatenate.

Returns:

The result vector with substrings.