From 88e78edf4f813a5be3c760e8d363b45e744d830f Mon Sep 17 00:00:00 2001
From: Björn Hagemeister
Date: Mon, 13 Oct 2014 17:20:21 +0200
Subject: Started implementing parsing command line arguments.

---
 src/main/java/org/openslx/satellitedaemon/App.java | 124 +++++++++++++++++++++
 .../java/org/openslx/satellitedaemon/Identity.java |   6 +
 2 files changed, 130 insertions(+)

diff --git a/src/main/java/org/openslx/satellitedaemon/App.java b/src/main/java/org/openslx/satellitedaemon/App.java
index e29520f..7c87401 100644
--- a/src/main/java/org/openslx/satellitedaemon/App.java
+++ b/src/main/java/org/openslx/satellitedaemon/App.java
@@ -1,6 +1,10 @@
 package org.openslx.satellitedaemon;
 
+import java.math.BigInteger;
 import java.security.NoSuchAlgorithmException;
+import java.security.interfaces.RSAPrivateKey;
+import java.security.interfaces.RSAPublicKey;
+import java.util.Random;
 
 import org.apache.log4j.BasicConfigurator;
 import org.apache.log4j.Logger;
@@ -20,6 +24,77 @@ public class App
 	{
 		BasicConfigurator.configure();
 
+		int i = 0;
+		String arg;
+		String organizationName;
+		String modulus, privExp, pubExp;
+		String ipAddress;
+		
+		// Check if there are arguments available and if they start with "--".
+		if (i < args.length && args[i].startsWith( "--" )) {
+			// Arguments available, take the first one.
+			arg = args[i++];
+			if (arg.equals( "--checkconfig" )) {
+				if (checkConfig()) {
+					System.exit( 0 );
+				}
+				System.exit( 2 );
+			} else if (arg.equals( "--genid" )) {
+				if (i < args.length) {
+					organizationName = args[i++];
+					if (genId(organizationName)) {
+						System.exit( 0 );
+					}
+					else 
+						System.exit( 2 );
+				} else {
+					log.error( "--genid requires an organization name" );
+					System.exit( 2 );
+				}
+			} else if (arg.equals( "--import" )) {
+				if ((i + 3) < args.length) {
+					log.error( "Illelgal option: '--import' requires 4 arguments, <OrgName> <Modulus> <priv_Exponent> <pub_Exponent>" );
+					System.exit( 2 );
+				} else {
+					organizationName = args[i++];
+					modulus = args[i++];
+					privExp = args[i++];
+					pubExp = args[i++];
+					if (importId(organizationName, modulus, privExp, pubExp)) {
+						System.exit( 0 );
+					} else
+						System.exit( 2 );
+				}
+			} else if (arg.equals( "--submitkey")) {
+				if (i < args.length) {
+					ipAddress = args[i++];
+					if (submitKey(ipAddress))
+						System.exit( 0 );
+					else 
+						System.exit( 2 );
+				} else {
+					log.error( "--submitkey requires <IPADDRESS>" );
+					System.exit( 2 );
+				}
+			} else if (arg.equals( "--updateaddress" )) {
+				if (i < args.length) {
+					ipAddress = args[i++];
+					if (updateAddress(ipAddress)) {
+						System.exit( 0 );
+					} else 
+						System.exit( 2 );
+				} else {
+					log.error( "--updateaddress requires <IPADDRESS>" );
+					System.exit( 2 );
+				}
+			}
+		} else if (args.length == 0) {
+			// No Option choosed, try to load existing identity.
+			if (!tryLoadIdentity()) {
+				System.exit( 2 );
+			}
+		}
+		
 		if ( !Globals.masterServerSslContextInit() ) {
 			log.error( "Problem with initializing the SSLContext" );
 			System.exit( 1 );
@@ -30,4 +105,53 @@ public class App
 		Thread downloadWorker = new Thread( new FileDownloadWorker() );
 		downloadWorker.start();
 	}
+	
+	private static boolean checkConfig() {
+		if (Identity.getOrganizationName() == null)
+			return false;
+		// TODO: check members of identity.java.
+		// Testing encryption and description
+      Random rnd = new Random();
+      if (Identity.keySize() != -1) {
+	      int size = rnd.nextInt(Identity.keySize() - 1);
+	      BigInteger text = new BigInteger(size,rnd);
+	      RSAPublicKey pub = (RSAPublicKey) Identity.getPublicKey();
+	      RSAPrivateKey priv = (RSAPrivateKey) Identity.getPrivateKey();
+	      BigInteger cipher = text.modPow(pub.getPublicExponent(), pub.getModulus());
+	      BigInteger decrypted = cipher.modPow(priv.getPrivateExponent(), priv.getModulus());
+	      boolean isPassed = text.equals(decrypted);
+	      return isPassed;
+      }
+      return false;
+//	      System.out.println("--- RSA encryption test ---");
+//	      System.out.println("Is test passed: "+isPassed);
+//	      System.out.println("Original text: "+text);
+//	      System.out.println("Cipher text: "+cipher);
+//	      System.out.println("Decrypted text: "+decrypted);
+	}
+	
+	private static boolean genId(String organizationName) {
+		// TODO.
+		return false;
+	}
+	
+	private static boolean importId(String organizationName, String modulus, String privExp, String pubExp) {
+		// TODO.
+		return false;
+	}
+	
+	private static boolean submitKey(String ipAddress) {
+		// TODO.
+		return false;
+	}
+	
+	private static boolean updateAddress(String ipAddress) {
+		// TODO.
+		return false;
+	}
+	
+	private static boolean tryLoadIdentity() {
+		// TODO.
+		return false;
+	}
 }
diff --git a/src/main/java/org/openslx/satellitedaemon/Identity.java b/src/main/java/org/openslx/satellitedaemon/Identity.java
index 8126aa9..de30fbb 100644
--- a/src/main/java/org/openslx/satellitedaemon/Identity.java
+++ b/src/main/java/org/openslx/satellitedaemon/Identity.java
@@ -96,6 +96,12 @@ public class Identity
 		return akh.getPublicKey();
 	}
 
+	public static int keySize() {
+		if (getModulus() != null) 
+			return getModulus().bitLength();
+		return -1;
+	}
+	
 	private static BigInteger toBigInt( String str )
 	{
 		try {
-- 
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