add Shift impl

src/pir/Shift.java

@@ -0,0 +1,197 @@
+package pir;
+
+import communication.Communication;
+import crypto.Crypto;
+import exceptions.NoSuchPartyException;
+import oram.Forest;
+import oram.Metadata;
+import protocols.Protocol;
+import protocols.struct.Party;
+import protocols.struct.PreData;
+import util.M;
+import util.P;
+import util.Timer;
+import util.Util;
+
+public class Shift extends Protocol {
+
+	private int pid = P.Shift;
+
+	public Shift(Communication con1, Communication con2) {
+		super(con1, con2);
+	}
+
+	public byte[][] runE(PreData predata, byte[][] x, int s, Timer timer) {
+		timer.start(pid, M.offline_comp);
+
+		int n = x.length;
+		int l = x[0].length;
+		byte[][] q = new byte[n][];
+		for (int i = 0; i < n; i++)
+			q[i] = Util.nextBytes(l, Crypto.sr);
+
+		timer.start(pid, M.offline_write);
+		con2.write(q);
+		timer.stop(pid, M.offline_write);
+
+		timer.start(pid, M.offline_read);
+		byte[][] r = con1.readDoubleByteArray();
+		timer.stop(pid, M.offline_read);
+
+		timer.stop(pid, M.offline_comp);
+
+		// ----------------------------------------- //
+
+		timer.start(pid, M.online_comp);
+
+		timer.start(pid, M.online_read);
+		byte[][] z = con2.readDoubleByteArray(pid);
+		timer.stop(pid, M.online_read);
+
+		byte[][] b = new byte[n][];
+		for (int i = 0; i < n; i++) {
+			Util.setXor(z[i], r[i]);
+			Util.setXor(z[i], x[i]);
+		}
+		for (int i = 0; i < n; i++) {
+			b[i] = z[(i + s) % n];
+			Util.setXor(b[i], q[i]);
+		}
+
+		timer.stop(pid, M.online_comp);
+		return b;
+	}
+
+	public void runD(PreData predata, int s, int n, int l, Timer timer) {
+		timer.start(pid, M.offline_comp);
+
+		byte[][] r = new byte[n][];
+		for (int i = 0; i < n; i++)
+			r[i] = Util.nextBytes(l, Crypto.sr);
+
+		timer.start(pid, M.offline_write);
+		con1.write(r);
+		timer.stop(pid, M.offline_write);
+
+		timer.start(pid, M.offline_read);
+		byte[][] p = con2.readDoubleByteArray();
+		timer.stop(pid, M.offline_read);
+
+		for (int i = 0; i < n; i++)
+			Util.setXor(p[i], r[i]);
+
+		timer.stop(pid, M.offline_comp);
+
+		// ----------------------------------------- //
+
+		timer.start(pid, M.online_comp);
+
+		byte[][] a = new byte[n][];
+		for (int i = 0; i < n; i++)
+			a[i] = p[(i + s) % n];
+
+		timer.start(pid, M.online_write);
+		con2.write(pid, a);
+		timer.stop(pid, M.online_write);
+
+		timer.stop(pid, M.online_comp);
+		return;
+	}
+
+	public byte[][] runC(PreData predata, byte[][] x, Timer timer) {
+		timer.start(pid, M.offline_comp);
+
+		int n = x.length;
+		int l = x[0].length;
+		byte[][] p = new byte[n][];
+		for (int i = 0; i < n; i++)
+			p[i] = Util.nextBytes(l, Crypto.sr);
+
+		timer.start(pid, M.offline_write);
+		con2.write(p);
+		timer.stop(pid, M.offline_write);
+
+		timer.start(pid, M.offline_read);
+		byte[][] q = con1.readDoubleByteArray();
+		timer.stop(pid, M.offline_read);
+
+		timer.stop(pid, M.offline_comp);
+
+		// ----------------------------------------- //
+
+		timer.start(pid, M.online_comp);
+
+		for (int i = 0; i < n; i++)
+			Util.setXor(p[i], x[i]);
+
+		timer.start(pid, M.online_write);
+		con1.write(pid, p);
+		timer.stop(pid, M.online_write);
+
+		timer.start(pid, M.online_read);
+		byte[][] a = con2.readDoubleByteArray(pid);
+		timer.stop(pid, M.online_read);
+
+		for (int i = 0; i < n; i++)
+			Util.setXor(a[i], q[i]);
+
+		timer.stop(pid, M.online_comp);
+		return a;
+	}
+
+	@Override
+	public void run(Party party, Metadata md, Forest[] forest) {
+
+		Timer timer = new Timer();
+		PreData predata = new PreData();
+
+		for (int j = 0; j < 100; j++) {
+			int n = 500;
+			int l = 50;
+			byte[][] x = new byte[n][l];
+			for (int i = 0; i < n; i++) {
+				Crypto.sr.nextBytes(x[i]);
+			}
+			int s = Crypto.sr.nextInt(n);
+
+			if (party == Party.Eddie) {
+				con1.write(s);
+				byte[][] y1 = this.runE(predata, x, s, timer);
+
+				byte[][] x2 = con2.readDoubleByteArray();
+				byte[][] y2 = con2.readDoubleByteArray();
+				for (int i = 0; i < n; i++) {
+					Util.setXor(x2[i], x[i]);
+					Util.setXor(y2[i], y1[i]);
+				}
+				boolean fail = false;
+				for (int i = 0; i < n; i++) {
+					if (!Util.equal(y2[i], x2[(i + s) % n])) {
+						System.err.println(j + ": Shift test failed");
+						fail = true;
+						break;
+					}
+				}
+				if (!fail)
+					System.out.println(j + ": Shift test passed");
+
+			} else if (party == Party.Debbie) {
+				s = con1.readInt();
+				this.runD(predata, s, n, l, timer);
+
+			} else if (party == Party.Charlie) {
+				byte[][] y2 = this.runC(predata, x, timer);
+
+				con1.write(x);
+				con1.write(y2);
+
+			} else {
+				throw new NoSuchPartyException(party + "");
+			}
+		}
+	}
+
+	@Override
+	public void run(Party party, Metadata md, Forest forest) {
+	}
+}

src/ui/CLI.java

@@ -113,6 +113,8 @@ public class CLI {
 			operation = ShiftXorPIR.class;
 		} else if (protocol.equals("tsxpir")) {
 			operation = ThreeShiftXorPIR.class;
+		} else if (protocol.equals("shift")) {
+			operation = Shift.class;
 
 		} else {
 			System.out.println("Protocol " + protocol + " not supported");

src/util/P.java

@@ -18,8 +18,9 @@ public class P {
 	public static final int TSPIR = 13;
 	public static final int SftXorPIR = 14;
 	public static final int TSXPIR = 15;
+	public static final int Shift = 16;
 
 	public static final String[] names = { "ACC", "COT", "IOT", "PPT", "RSF", "UR", "URXOT", "EVI", "PT", "PI", "XOT",
-			"SSPIR", "SftPIR", "TSPIR", "SftXorPIR", "TSXPIR" };
+			"SSPIR", "SftPIR", "TSPIR", "SftXorPIR", "TSXPIR", "Shift" };
 	public static final int size = names.length;
 }

test/pir/TestShift_C.java

@@ -0,0 +1,50 @@
+package pir;
+
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.InputStreamReader;
+import java.util.Arrays;
+
+public class TestShift_C {
+
+	public static void main(String[] args) {
+		Runtime runTime = Runtime.getRuntime();
+		Process process = null;
+		String dir = System.getProperty("user.dir");
+		String binDir = dir + "\\bin";
+		String libs = dir + "\\lib\\*";
+		try {
+			process = runTime.exec("java -classpath " + binDir + ";" + libs + " ui.CLI -protocol shift charlie");
+
+		} catch (IOException e) {
+			e.printStackTrace();
+		}
+		InputStream inputStream = process.getInputStream();
+		InputStreamReader isr = new InputStreamReader(inputStream);
+		InputStream errorStream = process.getErrorStream();
+		InputStreamReader esr = new InputStreamReader(errorStream);
+
+		System.out.println("STANDARD OUTPUT:");
+		int n1;
+		char[] c1 = new char[1024];
+		try {
+			while ((n1 = isr.read(c1)) > 0) {
+				System.out.print(new String(Arrays.copyOfRange(c1, 0, n1)));
+			}
+		} catch (IOException e) {
+			e.printStackTrace();
+		}
+
+		System.out.println("STANDARD ERROR:");
+		int n2;
+		char[] c2 = new char[1024];
+		try {
+			while ((n2 = esr.read(c2)) > 0) {
+				System.err.print(new String(Arrays.copyOfRange(c2, 0, n2)));
+			}
+		} catch (IOException e) {
+			e.printStackTrace();
+		}
+	}
+
+}

test/pir/TestShift_D.java

@@ -0,0 +1,50 @@
+package pir;
+
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.InputStreamReader;
+import java.util.Arrays;
+
+public class TestShift_D {
+
+	public static void main(String[] args) {
+		Runtime runTime = Runtime.getRuntime();
+		Process process = null;
+		String dir = System.getProperty("user.dir");
+		String binDir = dir + "\\bin";
+		String libs = dir + "\\lib\\*";
+		try {
+			process = runTime.exec("java -classpath " + binDir + ";" + libs + " ui.CLI -protocol shift debbie");
+
+		} catch (IOException e) {
+			e.printStackTrace();
+		}
+		InputStream inputStream = process.getInputStream();
+		InputStreamReader isr = new InputStreamReader(inputStream);
+		InputStream errorStream = process.getErrorStream();
+		InputStreamReader esr = new InputStreamReader(errorStream);
+
+		System.out.println("STANDARD OUTPUT:");
+		int n1;
+		char[] c1 = new char[1024];
+		try {
+			while ((n1 = isr.read(c1)) > 0) {
+				System.out.print(new String(Arrays.copyOfRange(c1, 0, n1)));
+			}
+		} catch (IOException e) {
+			e.printStackTrace();
+		}
+
+		System.out.println("STANDARD ERROR:");
+		int n2;
+		char[] c2 = new char[1024];
+		try {
+			while ((n2 = esr.read(c2)) > 0) {
+				System.err.print(new String(Arrays.copyOfRange(c2, 0, n2)));
+			}
+		} catch (IOException e) {
+			e.printStackTrace();
+		}
+	}
+
+}

test/pir/TestShift_E.java

@@ -0,0 +1,50 @@
+package pir;
+
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.InputStreamReader;
+import java.util.Arrays;
+
+public class TestShift_E {
+
+	public static void main(String[] args) {
+		Runtime runTime = Runtime.getRuntime();
+		Process process = null;
+		String dir = System.getProperty("user.dir");
+		String binDir = dir + "\\bin";
+		String libs = dir + "\\lib\\*";
+		try {
+			process = runTime.exec("java -classpath " + binDir + ";" + libs + " ui.CLI -protocol shift eddie");
+
+		} catch (IOException e) {
+			e.printStackTrace();
+		}
+		InputStream inputStream = process.getInputStream();
+		InputStreamReader isr = new InputStreamReader(inputStream);
+		InputStream errorStream = process.getErrorStream();
+		InputStreamReader esr = new InputStreamReader(errorStream);
+
+		System.out.println("STANDARD OUTPUT:");
+		int n1;
+		char[] c1 = new char[1024];
+		try {
+			while ((n1 = isr.read(c1)) > 0) {
+				System.out.print(new String(Arrays.copyOfRange(c1, 0, n1)));
+			}
+		} catch (IOException e) {
+			e.printStackTrace();
+		}
+
+		System.out.println("STANDARD ERROR:");
+		int n2;
+		char[] c2 = new char[1024];
+		try {
+			while ((n2 = esr.read(c2)) > 0) {
+				System.err.print(new String(Arrays.copyOfRange(c2, 0, n2)));
+			}
+		} catch (IOException e) {
+			e.printStackTrace();
+		}
+	}
+
+}