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AuctionProg
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Initial commit (v2)

This commit is contained in:
Ben Goldsworthy 2020-06-24 10:51:22 +01:00
parent 36d4aaac81
commit 3a07a83a85
15 changed files with 856 additions and 310 deletions
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1
bin/1. rmireg.bat Executable file
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@ -0,0 +1 @@
start rmiregistry

3
bin/2. compile.bat Executable file
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@ -0,0 +1,3 @@
set CLASSPATH=%CLASSPATH%;C:\JGroups\jgroups-3.6.0.Final.jar;
javac -Xlint:unchecked *.java
pause

3
bin/3. startServer.bat Executable file
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@ -0,0 +1,3 @@
set CLASSPATH=%CLASSPATH%;C:\JGroups\jgroups-3.6.0.Final.jar;
java -Djava.net.preferIPv4Stack=true AuctionServer
pause

3
bin/4. startClient.bat Executable file
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@ -0,0 +1,3 @@
set /p id="Username (leave blank for new user): "
java -Djava.net.preferIPv4Stack=true AuctionClient %id%
pause

1
bin/rmireg.bat
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@ -1 +0,0 @@
javac *.java && start rmiregistry

1
bin/startClient.bat
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@ -1 +0,0 @@
javac *.java && java AuctionClient

1
bin/startServer.bat
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@ -1 +0,0 @@
javac *.java && java AuctionServer

116
src/Auction.java
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@ -1,5 +1,5 @@
/*
* AuctionProg 1.0
* AuctionProg 2.0
* Copyright © 2016 Ben Goldsworthy (rumps)
*
* A program to facilitate a networked auction system.
@ -31,34 +31,37 @@ import java.security.spec.PKCS8EncodedKeySpec;
import java.security.spec.X509EncodedKeySpec;
/**
** @author Ben Goldsworthy (rumps) <me+auctionprog@bengoldsworthy.net>
** @version 1.0
** @author Ben Goldsworthy (rumps) <bgoldsworthy96 @ gmail.com>
** @version 2.0
**/
public interface Auction extends java.rmi.Remote {
/*
* Methods to validate operations and then remotely invoke methods
* using JGroups.
*
*/
/**
** Creates an auction with the given details, generating a new ID for
** it.
** Invokes the creation of a new auction.
**
** @param desc The auction description.
** @param owner The auction owner/creator.
** @param startingPrice The auction starting price.
** @param reserve The auction reserve price.
** @param newAuction The new auction to create.
**/
public void createAuction(String desc, UserWrapper owner, float startingPrice, float reserve) throws java.rmi.RemoteException;
public void openNewAuction(AuctionWrapper newAuction) throws java.rmi.RemoteException;
/**
** Removes an auction, provided the user calling the method owns it.
** If the reserve price was met, also returns the winning bidder.
** Validates that the calling user owns the auction in question, and
** if invokes the closing of the auction, returning the winning
** bidder (if applicaable).
**
** @param id The ID of the auction to remove.
** @param currentUser The user calling the method.
** @return The `UserWrapper` of the highest bidder, if applicable.
** @param id The ID of the auction to bid on.
** @param currentUser The user placing the bid.
** @return The highest bidder, or `null`.
**/
public UserWrapper removeAuction(int id, UserWrapper currentUser) throws java.rmi.RemoteException;
public void closeAuction(int id, UserWrapper currentUser) throws java.rmi.RemoteException;
/**
** Bids on a given auction, provided the bid is more than the
** current highest price.
** Validates a bid is higher than the given auctions current price,
** and if so invokes the setting the a new bid and bidder.
**
** @param id The ID of the auction in question.
** @param bidder The user bidding on the auction.
@ -67,30 +70,35 @@ public interface Auction extends java.rmi.Remote {
public void bidOnAuction(int id, UserWrapper bidder, float price) throws java.rmi.RemoteException;
/**
** Accessor Method. Retrieves a list of all the auctions.
** Invokes the returning of a list of all the current auctions.
**
** @return An `ArrayList` of `AuctionWrapper`s.
**/
public ArrayList<AuctionWrapper> getAuctions() throws java.rmi.RemoteException;
public ArrayList<AuctionWrapper> showAllAuctions() throws java.rmi.RemoteException;
/**
** Accessor Method. Gets a user, or creates a new one if non
** exists with the given details.
** Accessor Method. Invokes the retrieval of a preexisting user,
** if it exists.
**
** @param name The user's name.
** @param email The user's email address.
** @param username The user's username.
** @return The relevant `UserWrapper`.
**/
public UserWrapper getUser(String username) throws java.rmi.RemoteException;
public UserWrapper registerUser(String name, String email, String username) throws java.rmi.RemoteException;
public void close() throws java.rmi.RemoteException;
public PublicKey getPublicKey() throws java.rmi.RemoteException;
public void sendPublicKey(PublicKey key, String username) throws java.rmi.RemoteException;
/**
** Tests that the username entered is not already taken, and
** invokes the creation of a new user with the given details if not.
**
** @param newUser The new user to validate and create.
** @return The newly-created user.
**/
public UserWrapper registerUser(UserWrapper newUser) throws java.rmi.RemoteException;
/*
* Methods that are called by the `AuctionClient` program via RMI.
*/
/**
** Accessor Method. Gets the status resulting from the last action
** attempted.
**
@ -98,9 +106,55 @@ public interface Auction extends java.rmi.Remote {
**/
public String getStatusofLast() throws java.rmi.RemoteException;
/**
** Accessor Method. Gets the server's public key.
**
** @return The public key.
**/
public PublicKey getPublicKey() throws java.rmi.RemoteException;
/**
** Retrieves a user's public key and writes it to a file.
**
** @param key The user's public key.
** @param usernam The user's username.
**/
public void sendPublicKey(PublicKey key, String username) throws java.rmi.RemoteException;
/**
** Sends back a user's challenge, signed with the server's private
** key.
**
** @param challenge The user's challenge.
** @return The signature.
**/
public byte[] challengeServer(byte[] challenge) throws java.rmi.RemoteException;
/**
** Sends a user's a challenge.
**
** @return The challenge.
**/
public byte[] getChallenge() throws java.rmi.RemoteException;
/**
** Takes a returned challenge from the user and verifies the
** signature.
**
** @param retChal The returned signature from the user.
** @param username The user's username.
** @return Whether the user has been verified or not.
**/
public boolean returnChallenge(byte[] retChal, String username) throws java.rmi.RemoteException;
/**
** Creates a new replica of the server.
**/
public void replicate() throws java.rmi.RemoteException;
/**
** Closes the server and replicas.
**/
public void close() throws java.rmi.RemoteException;
}

285
src/AuctionClient.java
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@ -1,5 +1,5 @@
/*
* AuctionProg 1.0
* AuctionProg 2.0
* Copyright © 2016 Ben Goldsworthy (rumps)
*
* A program to facilitate a networked auction system.
@ -37,85 +37,108 @@ import java.security.spec.PKCS8EncodedKeySpec;
import java.security.spec.X509EncodedKeySpec;
/**
** @author Ben Goldsworthy (rumps) <bgoldsworthy96 @ gmail.com>
** @version 1.0
** @author Ben Goldsworthy (rumps) <me+auctionprog@bengoldsworthy.net>
** @version 2.0
**/
public class AuctionClient {
// This regex is used to ensure the email address entered is a valid
// email address format
// RFC 2822 email address format
// (Source: http://stackoverflow.com/a/153751/4580273)
private static final Pattern rfc2822 = Pattern.compile("^[a-z0-9!#$%&'*+/=?^_`{|}~-]+(?:\\.[a-z0-9!#$%&'*+/=?^_`{|}~-]+)*@(?:[a-z0-9](?:[a-z0-9-]*[a-z0-9])?\\.)+[a-z0-9](?:[a-z0-9-]*[a-z0-9])?$");
private static Auction a;
private static ArrayList<String> options, debugOptions;
private static boolean debugMode;
/**
** Displays the UI.
** Sets up the program and runs the event loop.
**
** @param args Command-line arguments.
**/
public static void main(String[] args) {
debugMode = true;
displayIntro();
// Create the reference to the remote object through the
// remiregistry. This comes first because if it fails we can
// skip doing everything else.
try {
// Create the reference to the remote object through the
// remiregistry. This comes first because if it fails we can
// skip doing everything else.
Auction a = (Auction) Naming.lookup("rmi://localhost/AuctionService");
// Declares some variables that'll be used later on.
Scanner in = new Scanner(System.in);
UserWrapper currentUser = null;
int id;
float price;
a = (Auction) Naming.lookup("rmi://localhost/AuctionService");
setOptions();
// Authenticates the user, if the program is run with a username
// as an argument. Otherwise, prompts the user to create a new
// user.
currentUser = login(a, (args.length > 0) ? args[0] : "server");
while(true) {
// Resets the variables after each run through.
price = 0.0f;
printOptions();
switch(in.nextLine()) {
// This case takes auction details from the user and then
// creates a new auction with those.
case "1":
createNewAuction(a, currentUser);
break;
// This case removes the auction with the given ID, provided it
// is owned by the current user.
case "2":
deleteAuction(a, currentUser);
break;
// This case displays all the currently-available auctions.
case "3":
displayAuctions(a);
break;
// This case places a bid on an auction.
case "4":
placeBid(a, currentUser);
break;
// This case exits the program.
case "5":
System.exit(1);
break;
// The below cases are remote debug commands.
// This case remotely shuts down the server.
case "6":
a.close();
break;
default:
break;
}
}
UserWrapper currentUser = login((args.length > 0) ? args[0] : "server");
eventLoop(currentUser);
} catch (Exception e) {
System.out.println();
System.out.println("Exception");
System.out.println(e);
}
System.exit(-1);
}
private static UserWrapper login(Auction a, String username) throws java.rmi.RemoteException, java.security.NoSuchAlgorithmException, java.security.InvalidKeyException, java.security.SignatureException {
/*
* Loops indefinitely, taking user input for various options.
*/
private static void eventLoop(UserWrapper currentUser) throws Exception {
Scanner in = new Scanner(System.in);
while(true) {
printOptions();
try {
int enteredOption = Integer.parseInt(in.nextLine());
System.out.println();
if(enteredOption < options.size()) {
switch(options.get(enteredOption)) {
// This case takes auction details from the user and then
// creates a new auction with those.
case "Create auction":
createNewAuction(currentUser);
break;
// This case removes the auction with the given ID, provided it
// is owned by the current user.
case "Close auction":
closeAuction(currentUser);
break;
// This case displays all the currently-available auctions.
case "View all auctions":
displayAuctions();
break;
// This case places a bid on an auction.
case "Bid on auction":
placeBid(currentUser);
break;
case "Quit":
System.exit(1);
break;
default: break;
}
} else if(debugMode) {
switch(debugOptions.get(enteredOption-options.size())) {
case "Replicate server":
System.out.println("Server replicating...");
a.replicate();
System.out.println(a.getStatusofLast());
break;
case "Close server":
a.close();
break;
default: break;
}
}
} catch (NumberFormatException e) {
System.out.println("\nError: That is not a valid option.\n");
}
}
}
/*
* Logs a user in if they are preexisting (after authentication), or
* prompts a user to create a new user if not.
*/
private static UserWrapper login(String username) throws java.rmi.RemoteException, java.security.NoSuchAlgorithmException, java.security.InvalidKeyException, java.security.SignatureException {
UserWrapper user = null;
// If the user has run the program with a username argument,
@ -169,8 +192,8 @@ public class AuctionClient {
System.out.print("Enter name: ");
name = in.nextLine();
System.out.print("Enter email: ");
while (!rfc2822.matcher(email).matches()) {
System.out.print("Enter email: ");
email = in.nextLine();
if (!rfc2822.matcher(email).matches()) System.out.println("\nError: invalid email address\n");
}
@ -179,9 +202,14 @@ public class AuctionClient {
System.out.print("Enter username ('server' is prohibited): ");
username = in.nextLine();
}
user = a.registerUser(name, email, username);
System.out.println(a.getStatusofLast());
try {
user = a.registerUser(new UserWrapper(name, email, username));
System.out.println(a.getStatusofLast());
} catch (NullPointerException e) {
System.out.println(a.getStatusofLast());
System.exit(0);
}
}
// Upon a successful user creation, new keys are generated and
@ -198,12 +226,44 @@ public class AuctionClient {
return user;
}
private static void printOptions() {
System.out.println("1\tCreate auction\n2\tDelete auction\n3\tView auctions\n4\tBid on auction\n5\tQuit\n6\tClose server");
System.out.print("Choose option: ");
/*
* Sets the suite of options to present to the user.
*/
private static void setOptions() {
options = new ArrayList<String>();
options.add("Create auction");
options.add("Close auction");
options.add("View all auctions");
options.add("Bid on auction");
options.add("Quit");
debugOptions = new ArrayList<String>();
debugOptions.add("Replicate server");
debugOptions.add("Close server");
}
private static void createNewAuction(Auction a, UserWrapper currentUser) throws java.rmi.RemoteException {
/*
* Prints the options for the user.
*/
private static void printOptions() {
for(String option: options) {
System.out.println(options.indexOf(option) +"\t"+option);
}
if (debugMode) {
System.out.println("DEBUG");
int num = options.size();
for(String option: debugOptions) {
System.out.println((num++)+"\t"+option);
}
}
System.out.print("Choose option: ");
}
/*
* Prompts for auction details and then sends it off to be validated
* and created.
*/
private static void createNewAuction(UserWrapper currentUser) throws java.rmi.RemoteException {
float startPrice = 0.0f;
float reservePrice = 0.0f;
Scanner in = new Scanner(System.in);
@ -220,38 +280,73 @@ public class AuctionClient {
reservePrice = Float.parseFloat(in.nextLine());
}
a.createAuction(desc, currentUser, startPrice, reservePrice);
a.openNewAuction(new AuctionWrapper(0, desc, currentUser, startPrice, reservePrice));
System.out.println(a.getStatusofLast());
} catch(NumberFormatException ex){
System.out.println("\nError: not a valid price\n");
}
}
private static void deleteAuction(Auction a, UserWrapper currentUser) throws java.rmi.RemoteException {
/*
* Closes an auction (after sending the request off for validation).
*/
private static void closeAuction(UserWrapper currentUser) throws java.rmi.RemoteException {
int id;
UserWrapper winner;
Scanner in = new Scanner(System.in);
if (!a.getAuctions().isEmpty()) {
if (!a.showAllAuctions().isEmpty()) {
System.out.print("Enter auction number: ");
id = Integer.parseInt(in.nextLine());
try {
winner = a.removeAuction(id, currentUser);
System.out.println("\nAuction won by: "+winner.getName()+" <"+winner.getEmail()+">\n");
} catch(NullPointerException e) {
System.out.println(a.getStatusofLast());
}
a.closeAuction(id, currentUser);
System.out.println(a.getStatusofLast());
} else {
System.out.println("\nNo auctions available\n");
}
}
private static void displayAuctions(Auction a) throws java.rmi.RemoteException {
if (!a.getAuctions().isEmpty()) {
/*
* Displays the program intro preamble.
*/
private static void displayIntro() {
ArrayList<String> lines = new ArrayList<String>();
lines.add("");
lines.add("AuctionProg 1.0");
lines.add("Copyright \u00a9 2016 Ben Goldsworthy (rumps)");
lines.add("");
lines.add("A program to facilitate a networked auction system");
lines.add("This file is part of AuctionProg.");
lines.add("");
lines.add("AuctionProg is free software: you can redistribute it and/or modify");
lines.add("it under the terms of the GNU General Public License as published by");
lines.add("the Free Software Foundation, either version 3 of the License, or");
lines.add("(at your option) any later version.");
lines.add("");
lines.add("AuctionProg is distributed in the hope that it will be useful,");
lines.add("but WITHOUT ANY WARRANTY; without even the implied warranty of");
lines.add("MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the");
lines.add("GNU General Public License for more details.");
lines.add("");
lines.add("You should have received a copy of the GNU General Public License");
lines.add("along with AuctionProg. If not, see <http://www.gnu.org/licenses/>.");
lines.add("");
for(String line: lines){
System.out.println(line);
}
}
/*
* Displays all the available auctions.
*/
private static void displayAuctions() throws java.rmi.RemoteException {
if (!a.showAllAuctions().isEmpty()) {
System.out.println();
System.out.println("#\tOwner\tPrice\tDesc");
for (int i = 0; i < 80; i++) System.out.print("-");
for(AuctionWrapper auction: a.getAuctions()){
System.out.println();
for(AuctionWrapper auction: a.showAllAuctions()){
System.out.println(auction.getID()+"\t"+auction.getOwner().getUsername()+"\t\u00A3"+String.format("%.2f", auction.getPrice())+"\t"+auction.getDesc());
}
System.out.println("");
@ -260,10 +355,13 @@ public class AuctionClient {
}
}
private static void placeBid(Auction a, UserWrapper currentUser) throws java.rmi.RemoteException {
/*
* Takes bid details and sends the bid off.
*/
private static void placeBid(UserWrapper currentUser) throws java.rmi.RemoteException {
Scanner in = new Scanner(System.in);
if (!a.getAuctions().isEmpty()) {
if (!a.showAllAuctions().isEmpty()) {
try{
int id;
float price;
@ -284,9 +382,12 @@ public class AuctionClient {
}
}
/*
* Reads a user's private key from a file.
*/
private static PrivateKey readKey(String username) {
try {
FileInputStream keyfis = new FileInputStream(username + "priv.key");
FileInputStream keyfis = new FileInputStream("../key/client/"+username + "priv.key");
byte[] encKey = new byte[keyfis.available()];
keyfis.read(encKey);
keyfis.close();
@ -302,9 +403,12 @@ public class AuctionClient {
return null;
}
}
/*
* Reads the server's public key from a file.
*/
private static PublicKey readKey() {
try {
FileInputStream keyfis = new FileInputStream("serverpub.key");
FileInputStream keyfis = new FileInputStream("../key/client/serverpub.key");
byte[] encKey = new byte[keyfis.available()];
keyfis.read(encKey);
keyfis.close();
@ -321,16 +425,25 @@ public class AuctionClient {
}
}
/*
* Writes a private key to a file.
*/
private static void writeKey(PrivateKey pKey, String username) {
wK(pKey, username, "priv");
}
/*
* Writes a public key to a file.
*/
private static void writeKey(PublicKey pKey, String username) {
wK(pKey, username, "pub");
}
/*
* Actually writes a key to a file.
*/
private static void wK(Key pKey, String username, String type) {
try {
byte[] key = pKey.getEncoded();
FileOutputStream keyfos = new FileOutputStream(username+type+".key");
FileOutputStream keyfos = new FileOutputStream("../key/client/"+username+type+".key");
keyfos.write(key);
keyfos.close();
} catch (Exception e) {
@ -339,4 +452,4 @@ public class AuctionClient {
System.out.println(e);
}
}
}
}

481
src/AuctionImpl.java
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@ -1,5 +1,5 @@
/*
* AuctionProg 1.0
* AuctionProg 2.0
* Copyright © 2016 Ben Goldsworthy (rumps)
*
* A program to facilitate a networked auction system.
@ -29,20 +29,31 @@ import java.util.*;
import java.security.*;
import java.security.spec.PKCS8EncodedKeySpec;
import java.security.spec.X509EncodedKeySpec;
import org.jgroups.JChannel;
import org.jgroups.blocks.RpcDispatcher;
import org.jgroups.blocks.RequestOptions;
import org.jgroups.blocks.ResponseMode;
import org.jgroups.View;
import org.jgroups.util.*;
import java.lang.reflect.InvocationTargetException;
/**
** @author Ben Goldsworthy (rumps) <me+auctionprog@bengoldsworthy.net>
** @version 1.0
** @version 2.0
**/
public class AuctionImpl extends java.rmi.server.UnicastRemoteObject implements Auction {
private ArrayList<AuctionWrapper> auctions;
private ArrayList<UserWrapper> users;
String status;
byte[] challenge = new byte[1024];
static JChannel channel;
static RpcDispatcher disp;
static RequestOptions opts = new RequestOptions(ResponseMode.GET_ALL, 5000);
/**
** Constructor Method. Required to declare the `RemoteException`
** instance.
** instance. Also sets up three replicas and creates a test suite of
** three auctions.
**/
public AuctionImpl() throws java.rmi.RemoteException {
super();
@ -54,9 +65,32 @@ public class AuctionImpl extends java.rmi.server.UnicastRemoteObject implements
status = "";
generateKeys();
System.out.println("Server start successful.");
System.out.println("Server initiliasation successful.");
try {
channel=new JChannel();
disp = new RpcDispatcher(channel, this);
channel.connect("AuctionProg");
System.out.println("Creating replicas...");
new Replica().start();
new Replica().start();
new Replica().start();
System.out.println("Replicas created.");
UserWrapper testUser = new UserWrapper("Test", "test@test.com", "test");
this.openNewAuction(new AuctionWrapper(1, "test1", testUser, 12.0f, 14.0f));
this.openNewAuction(new AuctionWrapper(2, "test2", testUser, 12.0f, 14.0f));
this.openNewAuction(new AuctionWrapper(3, "test3", testUser, 12.0f, 14.0f));
} catch (Exception e) {
System.out.println(e);
}
}
/*
* Generates the pair of keys for the server's authentication and
* writes them to files.
*/
private void generateKeys() {
try {
KeyPairGenerator keyGen = KeyPairGenerator.getInstance("DSA");
@ -73,108 +107,226 @@ public class AuctionImpl extends java.rmi.server.UnicastRemoteObject implements
}
}
/*
* Methods to validate operations and then remotely invoke methods
* using JGroups.
*
*/
/**
** Creates an auction with the given details, generating a new ID for
** it.
** Invokes the creation of a new auction.
**
** @param desc The auction description.
** @param owner The auction owner/creator.
** @param startingPrice The auction starting price.
** @param reserve The auction reserve price.
** @param newAuction The new auction to create.
**/
public void createAuction(String desc, UserWrapper owner, float startingPrice, float reserve) throws java.rmi.RemoteException {
int id = 0;
String preamble = "Create new auction: ";
lines();
System.out.println(preamble + "begin.");
// Gives the new auction the lowest unclaimed ID.
for(AuctionWrapper item: auctions){
if (id <= item.getID()) {
id = item.getID();
}
public void openNewAuction(AuctionWrapper newAuction) throws java.rmi.RemoteException {
System.out.println("Opening new auction...");
try {
disp.callRemoteMethods(null, "createAuction", new Object[]{newAuction}, new Class[]{AuctionWrapper.class}, opts);
status = "Auction successfully opened.";
System.out.println("Auction successfully opened.");
return;
} catch (Exception e) {
System.out.println(e);
}
auctions.add(new AuctionWrapper(++id, desc, owner, startingPrice, reserve));
System.out.println(preamble + "auction "+id+" successfully created.");
status = "Auction no. "+id+" successfully created.";
System.out.println(preamble + "end.");
lines();
status = "Auction could not be opened.";
System.out.println("Auction unsuccessfully opened.");
}
/**
** Removes an auction, provided the user calling the method owns it.
** If the reserve price was met, also returns the winning bidder.
** Validates that the calling user owns the auction in question, and
** if invokes the closing of the auction, returning the winning
** bidder (if applicaable).
**
** @param id The ID of the auction to remove.
** @param currentUser The user calling the method.
** @return The `UserWrapper` of the highest bidder, if applicable.
** @param id The ID of the auction to bid on.
** @param currentUser The user placing the bid.
** @return The highest bidder, or `null`.
**/
public UserWrapper removeAuction(int id, UserWrapper currentUser) throws java.rmi.RemoteException {
public void closeAuction(int id, UserWrapper currentUser) throws java.rmi.RemoteException {
System.out.println("Closing auction #"+id+"...");
AuctionWrapper auction = this.getAuction(id);
UserWrapper response = null;
String preamble = "Close auction "+id+": ";
lines();
System.out.println(preamble + "begin.");
if (auction.getOwner().getUsername().equals(currentUser.getUsername())) {
System.out.println(preamble + "ownership rights confirmed.");
auctions.remove(auction);
System.out.println(preamble + "auction successfully closed.");
status = "Auction no. "+id+" successfully removed";
if (auction.getPrice() >= auction.getReserve()) {
System.out.println(preamble + "auction closed with winner.");
status = "Auction closed - winner";
response = auction.getHighestBidder();
} else {
System.out.println(preamble + "auction closed with no winner.");
status = "Auction closed - no winner";
System.out.println("Ownership rights confirmed.");
try {
RspList rsp_list = disp.callRemoteMethods(null, "removeAuction", new Object[]{auction}, new Class[]{AuctionWrapper.class}, opts);
System.out.println("Auction successfully closed.");
response = (UserWrapper)rsp_list.getFirst();
if (response.getUsername().equals("server")) {
status = "Auction closed with no winner";
} else {
status = "Auction won by: "+response.getName()+" <"+response.getEmail()+">";
}
return;
} catch (Exception e) {
System.out.println(e);
}
} else {
System.out.println(preamble + "invalid ownership rights.");
status = "Auction no. "+id+" could not be removed - you do not own this auction";
}
System.out.println(preamble + "end.");
lines();
return response;
status = "You do not own this auction.";
System.out.println("Auction closing unsuccessful.");
}
/**
** Bids on a given auction, provided the bid is more than the
** current highest price.
** Validates a bid is higher than the given auctions current price,
** and if so invokes the setting the a new bid and bidder.
**
** @param id The ID of the auction in question.
** @param bidder The user bidding on the auction.
** @param price The amount bid.
**/
public void bidOnAuction(int id, UserWrapper bidder, float price)
throws java.rmi.RemoteException {
public void bidOnAuction(int id, UserWrapper bidder, float price) throws java.rmi.RemoteException {
AuctionWrapper auction;
String preamble = "Bid on auction "+id+": ";
System.out.println("Placing bid on auction #"+id+"...");
lines();
System.out.println(preamble + "begin.");
if ((auction = this.getAuction(id)) != null) {
if (price > auction.getPrice()) {
this.getAuction(id).setBid(bidder, price);
System.out.println(preamble + "bid successful.");
status = "Bid successful";
try {
if ((auction = this.getAuction(id)) != null) {
if (price > auction.getPrice()) {
disp.callRemoteMethods(null, "setBid", new Object[]{auction, bidder, price}, new Class[]{AuctionWrapper.class, UserWrapper.class, float.class}, opts);
System.out.println("Bid successful.");
status = "Bid successful";
} else {
System.out.println("Bid unsuccessful.");
status = "Price less than highest bid";
}
} else {
System.out.println(preamble + "bid less than current highest bid.");
status = "Price less than highest bid";
System.out.println("Bid unsuccessful.");
status = "Invalid auction ID";
}
} catch (Exception e) {
System.out.println(e);
}
}
/**
** Invokes the returning of a list of all the current auctions.
**
** @return An `ArrayList` of `AuctionWrapper`s.
**/
public ArrayList<AuctionWrapper> showAllAuctions() throws java.rmi.RemoteException {
try {
RspList rsp_list=disp.callRemoteMethods(null, "getAllAuctions", null, null, opts);
return (ArrayList<AuctionWrapper>)rsp_list.getFirst();
} catch (Exception e) {
System.out.println(e);
}
return null;
}
/**
** Accessor Method. Invokes the retrieval of a preexisting user,
** if it exists.
**
** @param username The user's username.
** @return The relevant `UserWrapper`.
**/
public UserWrapper getUser(String username) throws java.rmi.RemoteException {
try {
RspList rsp_list=disp.callRemoteMethods(null, "getAllUsers", null, null, opts);
for(UserWrapper user: (ArrayList<UserWrapper>)rsp_list.getFirst()) {
if (user.getUsername().equals(username)) {
status = "Welcome back, "+user.getName()+".";
return user;
}
}
} catch (Exception e) {
System.out.println(e);
}
status = "No such user.";
return null;
}
/**
** Tests that the username entered is not already taken, and
** invokes the creation of a new user with the given details if not.
**
** @param newUser The new user to validate and create.
** @return The newly-created user.
**/
public UserWrapper registerUser(UserWrapper newUser) throws java.rmi.RemoteException {
try {
RspList rsp_list=disp.callRemoteMethods(null, "getAllUsers", null, null, opts);
if (!rsp_list.isEmpty()) {
for(UserWrapper user: (ArrayList<UserWrapper>)rsp_list.getFirst()){
if (user.getUsername().equals(newUser.getUsername())) {
status = "Username taken. Either choose a new username or, if trying to login to an existing account, rerun the program as 'AuctionClient <username>'.";
return null;
}
}
}
disp.callRemoteMethods(null, "createUser", new Object[]{newUser}, new Class[]{UserWrapper.class}, opts);
status = "New user created. Hello "+newUser.getName()+".";
return newUser;
} catch (Exception e) {
System.out.println(e);
}
status = "Something went wrong";
return null;
}
/*
* Methods that are remotely invoked via RPC on both this and the
* `Replica`s due to multicasting.
*/
/**
** Creates an auction with the given details.
**
** @param newAuction An `AuctionWrapper` of the new auction.
**/
private void createAuction(AuctionWrapper newAuction) throws java.rmi.RemoteException {
int id = 0;
// Gives the new auction the lowest unclaimed ID.
for(AuctionWrapper auction: auctions){
if (id <= auction.getID()) {
id = auction.getID();
}
} else {
System.out.println(preamble + "auction ID not found.");
status = "Invalid auction ID";
}
System.out.println(preamble + "end.");
lines();
newAuction.setID(++id);
auctions.add(newAuction);
status = "Auction no. "+id+" successfully created.";
}
/**
** Removes an auction. If the reserve price was met, also returns
** the winning bidder, otherwise an indicative `UserWrapper` with
** username of "server".
**
** @param auction The `AuctionWrapper` of the auction to remove.
** @return The `UserWrapper` of the highest bidder, or `null`.
**/
private UserWrapper removeAuction(AuctionWrapper auction) throws java.rmi.RemoteException {
auctions.remove(auction);
if (auction.getPrice() >= auction.getReserve()) {
return auction.getHighestBidder();
} else {
return new UserWrapper("err", "err", "server");
}
}
/**
** Mutator Method. Sets the bid on an auction.
**
** @param auction The `AuctionWrapper` of the auction to bid on.
** @param user The user bidding on the auction.
** @param price The amount the user has bid.
**/
private void setBid(AuctionWrapper auction, UserWrapper user, float price) {
this.getAuction(auction.getID()).setBid(user, price);
}
/**
** Accessor Method. Retrieves a list of all the auctions.
**
** @return An `ArrayList` of `AuctionWrapper`s.
**/
private ArrayList<AuctionWrapper> getAllAuctions() {
return this.auctions;
}
/**
@ -184,56 +336,42 @@ public class AuctionImpl extends java.rmi.server.UnicastRemoteObject implements
** @return The `AuctionWrapper` indicated.
**/
private AuctionWrapper getAuction(int id) {
for(AuctionWrapper auction: auctions){
if (auction.getID() == id) {
return auction;
try {
RspList rsp_list=disp.callRemoteMethods(null, "getAllAuctions", null, null, opts);
for(AuctionWrapper auction: (ArrayList<AuctionWrapper>)rsp_list.getFirst()) {
if (auction.getID() == id) {
return auction;
}
}
} catch (Exception e) {
System.out.println(e);
}
return null;
}
/**
** Accessor Method. Retrieves a list of all the auctions.
**
** @return An `ArrayList` of `AuctionWrapper`s.
** Creates a new user.
**
** @param newUser The new user to create.
**/
public ArrayList<AuctionWrapper> getAuctions() throws java.rmi.RemoteException {
return auctions;
private void createUser(UserWrapper newUser) {
System.out.println("doing it");
this.users.add(newUser);
}
/**
** Accessor Method. Gets a user, or creates a new one if non
** exists with the given details.
**
** @param name The user's name.
** @param email The user's email address.
** @return The relevant `UserWrapper`.
** Gets the list of all users.
**
** @return An `ArrayList` of users.
**/
public UserWrapper getUser(String username) throws java.rmi.RemoteException {
for(UserWrapper user: users){
if (user.getUsername().equals(username)) {
status = "Welcome back, "+user.getName()+".";
return user;
}
}
status = "No such user.";
return null;
}
public UserWrapper registerUser(String name, String email, String username) throws java.rmi.RemoteException {
for(UserWrapper user: users){
if (user.getUsername().equals(username)) {
status = "Username taken. Either choose a new username or, if trying to login to an existing account, rerun the program as 'AuctionClient <username>'.";
return null;
}
}
UserWrapper user = new UserWrapper(name, email, username);
users.add(user);
status = "New user created. Hello "+name+".";
return user;
private ArrayList<UserWrapper> getAllUsers() {
return this.users;
}
/*
* Methods that are called by the `AuctionClient` program via RMI.
*/
/**
** Accessor Method. Gets the status resulting from the last action
** attempted.
@ -244,18 +382,34 @@ public class AuctionImpl extends java.rmi.server.UnicastRemoteObject implements
return "\n"+status+"\n";
}
/**
** Accessor Method. Gets the server's public key.
**
** @return The public key.
**/
public PublicKey getPublicKey() throws java.rmi.RemoteException {
return this.readKey("server");
}
/**
** Retrieves a user's public key and writes it to a file.
**
** @param key The user's public key.
** @param usernam The user's username.
**/
public void sendPublicKey(PublicKey key, String username) throws java.rmi.RemoteException {
this.writeKey(key, username);
}
/*
* Writes the server's private key to a file.
*
* @param The private key.
*/
private static void writeKey(PrivateKey pKey) throws java.rmi.RemoteException {
try {
byte[] key = pKey.getEncoded();
FileOutputStream keyfos = new FileOutputStream("../key/serverpriv.key");
FileOutputStream keyfos = new FileOutputStream("../key/server/serverpriv.key");
keyfos.write(key);
keyfos.close();
} catch (Exception e) {
@ -265,10 +419,15 @@ public class AuctionImpl extends java.rmi.server.UnicastRemoteObject implements
}
}
/*
* Writes the server's public key to a file.
*
* @param The public key.
*/
private static void writeKey(PublicKey pKey) throws java.rmi.RemoteException {
try {
byte[] key = pKey.getEncoded();
FileOutputStream keyfos = new FileOutputStream("../key/serverpub.key");
FileOutputStream keyfos = new FileOutputStream("../key/server/serverpub.key");
keyfos.write(key);
keyfos.close();
} catch (Exception e) {
@ -278,10 +437,15 @@ public class AuctionImpl extends java.rmi.server.UnicastRemoteObject implements
}
}
/*
* Writes a user's public key to a file.
*
* @param The public key.
*/
private static void writeKey(PublicKey pKey, String username) throws java.rmi.RemoteException {
try {
byte[] key = pKey.getEncoded();
FileOutputStream keyfos = new FileOutputStream("../key/"+username+"pub.key");
FileOutputStream keyfos = new FileOutputStream("../key/server/"+username+"pub.key");
keyfos.write(key);
keyfos.close();
} catch (Exception e) {
@ -291,9 +455,14 @@ public class AuctionImpl extends java.rmi.server.UnicastRemoteObject implements
}
}
/*
* Reads the server's private key from a file.
*
* @return The private key.
*/
private static PrivateKey readKey() throws java.rmi.RemoteException {
try {
FileInputStream keyfis = new FileInputStream("../key/serverpriv.key");
FileInputStream keyfis = new FileInputStream("../key/server/serverpriv.key");
byte[] encKey = new byte[keyfis.available()];
keyfis.read(encKey);
keyfis.close();
@ -310,9 +479,15 @@ public class AuctionImpl extends java.rmi.server.UnicastRemoteObject implements
}
}
/*
* Reads a user's public key from a file.
*
* @param username The user's username.
* @return The public key.
*/
private static PublicKey readKey(String username) throws java.rmi.RemoteException {
try {
FileInputStream keyfis = new FileInputStream("../key/"+username+"pub.key");
FileInputStream keyfis = new FileInputStream("../key/server/"+username+"pub.key");
byte[] encKey = new byte[keyfis.available()];
keyfis.read(encKey);
@ -330,7 +505,13 @@ public class AuctionImpl extends java.rmi.server.UnicastRemoteObject implements
}
}
/**
** Sends back a user's challenge, signed with the server's private
** key.
**
** @param challenge The user's challenge.
** @return The signature.
**/
public byte[] challengeServer(byte[] challenge) throws java.rmi.RemoteException {
try {
Signature dsa = Signature.getInstance("SHA1withDSA");
@ -347,17 +528,32 @@ public class AuctionImpl extends java.rmi.server.UnicastRemoteObject implements
}
}
/**
** Sends a user's a challenge.
**
** @return The challenge.
**/
public byte[] getChallenge() throws java.rmi.RemoteException {
challenge = new byte[1024];
new Random().nextBytes(this.challenge);
return this.challenge;
}
/**
** Takes a returned challenge from the user and verifies the
** signature.
**
** @param retChal The returned signature from the user.
** @param username The user's username.
** @return Whether the user has been verified or not.
**/
public boolean returnChallenge(byte[] retChal, String username) throws java.rmi.RemoteException {
System.out.println("Authenticating user '"+username+"'...");
for(UserWrapper user: users){
if (user.getUsername().equals(username)) {
try {
System.out.println(users);
try {
RspList rsp_list=disp.callRemoteMethods(null, "getAllUsers", null, null, opts);
for(UserWrapper user: (ArrayList<UserWrapper>)rsp_list.getFirst()) {
if (user.getUsername().equals(username)) {
Signature sig = Signature.getInstance("SHA1withDSA");
sig.initVerify(this.readKey(username));
@ -366,24 +562,41 @@ public class AuctionImpl extends java.rmi.server.UnicastRemoteObject implements
boolean verifies = sig.verify(retChal);
System.out.println(username+" signature verifies: " + verifies);
return verifies;
} catch (Exception e) {
System.out.println();
System.out.println("Exception");
System.out.println(e);
}
}
} catch (Exception e) {
System.out.println(e);
}
System.out.println("User '"+username+"' not found.");
return false;
}
public void close() throws java.rmi.RemoteException {
System.exit(-1);
/**
** Creates a new replica of the server.
**/
public void replicate() throws java.rmi.RemoteException {
try {
new Replica().start();
status = "Server replication successful.";
} catch (Exception e) {
System.out.println(e);
status = "Server replication failed.";
}
}
private void lines() {
for (int i = 0; i < 80; i++) System.out.print("-");
System.out.print("\n");
/**
** Closes the server and replicas.
**/
public void close() throws java.rmi.RemoteException {
System.out.println("Stopping replicas");
try {
disp.callRemoteMethods(null, "stop", null, null, opts);
} catch (Exception e) {
System.out.println(e);
}
channel.close();
disp.stop();
System.exit(-1);
}
}

39
src/AuctionServer.java
View File

@ -1,5 +1,5 @@
/*
* AuctionProg 1.0
* AuctionProg 2.0
* Copyright © 2016 Ben Goldsworthy (rumps)
*
* A program to facilitate a networked auction system.
@ -25,16 +25,18 @@
**/
import java.rmi.Naming;
import java.util.*;
/**
** @author Ben Goldsworthy (rumps) <me+auctionprog@bengoldsworthy.net>
** @version 1.0
** @version 2.0
**/
public class AuctionServer {
/**
** Constructor Method.
**/
public AuctionServer() {
try {
Auction a = new AuctionImpl();
Naming.rebind("rmi://localhost/AuctionService", a);
@ -49,6 +51,39 @@ public class AuctionServer {
** @param args Command-line arguments.
**/
public static void main(String args[]) {
displayIntro();
new AuctionServer();
}
/*
* Displays the intro preamble to the user.
*/
private static void displayIntro() {
ArrayList<String> lines = new ArrayList<String>();
lines.add("");
lines.add("AuctionProg 1.0");
lines.add("Copyright \u00a9 2016 Ben Goldsworthy (rumps)");
lines.add("");
lines.add("A program to facilitate a networked auction system");
lines.add("This file is part of AuctionProg.");
lines.add("");
lines.add("AuctionProg is free software: you can redistribute it and/or modify");
lines.add("it under the terms of the GNU General Public License as published by");
lines.add("the Free Software Foundation, either version 3 of the License, or");
lines.add("(at your option) any later version.");
lines.add("");
lines.add("AuctionProg is distributed in the hope that it will be useful,");
lines.add("but WITHOUT ANY WARRANTY; without even the implied warranty of");
lines.add("MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the");
lines.add("GNU General Public License for more details.");
lines.add("");
lines.add("You should have received a copy of the GNU General Public License");
lines.add("along with AuctionProg. If not, see <http://www.gnu.org/licenses/>.");
lines.add("");
for(String line: lines){
System.out.println(line);
}
}
}

15
src/AuctionWrapper.java
View File

@ -1,5 +1,5 @@
/*
* AuctionProg 1.0
* AuctionProg 2.0
* Copyright © 2016 Ben Goldsworthy (rumps)
*
* A program to facilitate a networked auction system.
@ -28,7 +28,7 @@ import java.io.*;
/**
** @author Ben Goldsworthy (rumps) <me+auctionprog@bengoldsworthy.net>
** @version 1.0
** @version 2.0
**/
public class AuctionWrapper implements Serializable {
private int id;
@ -46,7 +46,7 @@ public class AuctionWrapper implements Serializable {
** @param startingPrice The starting price of the auction.
** @param reserve The reserve price of the auction.
**/
public AuctionWrapper(int id, String desc, UserWrapper owner, float startingPrice, float reserve){
public AuctionWrapper(int id, String desc, UserWrapper owner, float startingPrice, float reserve) {
this.id = id;
this.desc = desc;
this.owner = owner;
@ -120,4 +120,13 @@ public class AuctionWrapper implements Serializable {
public float getReserve() {
return this.reserve;
}
/**
** Mutator Method. Sets the auction ID.
** @param id The new auction ID.
**/
public void setID(int id) {
this.id = id;
}
}

47
src/GenSig.java
View File

@ -1,47 +0,0 @@
import java.io.*;
import java.security.*;
class GenSig {
public static void main(String[] args) {
/* Generate a DSA signature */
if (args.length != 1) {
System.out.println("Usage: GenSig nameOfFileToSign");
} else try {
KeyPairGenerator keyGen = KeyPairGenerator.getInstance("DSA", "SUN");
SecureRandom random = SecureRandom.getInstance("SHA1PRNG", "SUN");
keyGen.initialize(1024, random);
KeyPair pair = keyGen.generateKeyPair();
PrivateKey priv = pair.getPrivate();
PublicKey pub = pair.getPublic();
Signature dsa = Signature.getInstance("SHA1withDSA", "SUN");
dsa.initSign(priv);
FileInputStream fis = new FileInputStream(args[0]);
BufferedInputStream bufin = new BufferedInputStream(fis);
byte[] buffer = new byte[1024];
int len;
while ((len = bufin.read(buffer)) >= 0) {
dsa.update(buffer, 0, len);
};
bufin.close();
byte[] realSig = dsa.sign();
/* save the signature in a file */
FileOutputStream sigfos = new FileOutputStream("sig");
sigfos.write(realSig);
sigfos.close();
/* save the public key in a file */
byte[] key = pub.getEncoded();
FileOutputStream keyfos = new FileOutputStream("suepk");
keyfos.write(key);
keyfos.close();
} catch (Exception e) {
System.err.println("Caught exception " + e.toString());
}
}
}

158
src/Replica.java Executable file
View File

@ -0,0 +1,158 @@
/*
* AuctionProg 2.0
* Copyright © 2016 Ben Goldsworthy (rumps)
*
* A program to facilitate a networked auction system.
*
* This file is part of AuctionProg.
*
* AuctionProg 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 of the License, or
* (at your option) any later version.
*
* AuctionProg 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 AuctionProg. If not, see <http://www.gnu.org/licenses/>.
*/
/**
** This class represents a User.
**/
import java.io.*;
import java.util.*;
import org.jgroups.JChannel;
import org.jgroups.blocks.RpcDispatcher;
import org.jgroups.blocks.RequestOptions;
import org.jgroups.blocks.ResponseMode;
import org.jgroups.util.*;
/**
** @author Ben Goldsworthy (rumps) <me+auctionprog@bengoldsworthy.net>
** @version 2.0
**/
public class Replica {
JChannel channel;
RpcDispatcher disp;
RequestOptions opts=new RequestOptions(ResponseMode.GET_ALL, 5000);
private ArrayList<AuctionWrapper> auctions;
private ArrayList<UserWrapper> users;
/**
** Connects to the channel and sets itself up.
**/
public void start() {
try {
channel = new JChannel();
disp = new RpcDispatcher(channel, this);
channel.connect("AuctionProg");
auctions = new ArrayList<AuctionWrapper>();
users = new ArrayList<UserWrapper>();
} catch (Exception e) {
System.out.println(e);
}
}
/**
** Shuts down the replica.
**/
public void stop() {
channel.close();
disp.stop();
}
/**
** Creates a new auction.
**
** @param newAuction The new auction to create.
**/
public void createAuction(AuctionWrapper newAuction) {
int id = 0;
// Gives the new auction the lowest unclaimed ID.
for(AuctionWrapper auction: auctions){
if (id <= auction.getID()) {
id = auction.getID();
}
}
newAuction.setID(++id);
auctions.add(newAuction);
}
/**
** Removes an auction from the list.
**
** @param auction The auction to remove.
** @return The highest-bidding user (if applicable).
**/
public UserWrapper removeAuction(AuctionWrapper auction) {
auctions.remove(auction);
if (auction.getPrice() >= auction.getReserve()) {
return auction.getHighestBidder();
} else {
return new UserWrapper("err", "err", "server");
}
}
/**
** Mutator Method. Sets a new bid on an auction.
**
** @param auction The auction to bid on.
** @param user The user bidding.
** @param price The user's bid.
**/
public void setBid(AuctionWrapper auction, UserWrapper user, float price) {
this.getAuction(auction.getID()).setBid(user, price);
}
/**
** Accessor Method. Gets all the auctions.
**
** @return The list of auctions.
**/
public ArrayList<AuctionWrapper> getAllAuctions() {
return this.auctions;
}
/**
** Gets an auction by ID.
**
** @param id The auction ID.
** @return The auction requested, or `null`.
**/
private AuctionWrapper getAuction(int id) {
for(AuctionWrapper auction: auctions) {
if (auction.getID() == id) {
return auction;
}
}
return null;
}
/**
** Accessor Method. Gets the list of all users.
**
** @return The list of users.
**/
public ArrayList<UserWrapper> getAllUsers() {
return this.users;
}
/**
** Creates a new user.
**
** @param The new user to create.
**/
public void createUser(UserWrapper newUser) {
this.users.add(newUser);
}
}

12
src/UserWrapper.java
View File

@ -1,5 +1,5 @@
/*
* AuctionProg 1.0
* AuctionProg 2.0
* Copyright © 2016 Ben Goldsworthy (rumps)
*
* A program to facilitate a networked auction system.
@ -28,7 +28,7 @@ import java.io.*;
/**
** @author Ben Goldsworthy (rumps) <me+auctionprog@bengoldsworthy.net>
** @version 1.0
** @version 2.0
**/
public class UserWrapper implements Serializable {
private String name;
@ -49,19 +49,23 @@ public class UserWrapper implements Serializable {
/**
** Accessor Method. Returns the user's name.
** @param The user's name.
** @return The user's name.
**/
public String getName() {
return this.name;
}
/**
** Accessor Method. Returns the user's username.
** @return The user's username.
**/
public String getUsername() {
return this.username;
}
/**
** Accessor Method. Returns the user's email address.
** @param The user's email address.
** @return The user's email address.
**/
public String getEmail() {
return this.email;