From 81d1abbbad1f1e9c7774c7162b23fc804f7989a3 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Magdalena=20Grodzi=C5=84ska?= <mag.grodzinska@gmail.com>
Date: Mon, 13 Jan 2020 20:56:01 +0100
Subject: Add reading keys from file

---
 build.gradle                                       | 18 ++++++-
 .../java/pl/edu/mimuw/cloudatlas/KeyGenerator.java | 59 ++++++++++++++++++++--
 .../mimuw/cloudatlas/querysigner/QueryData.java    |  4 ++
 3 files changed, 75 insertions(+), 6 deletions(-)
 create mode 100644 src/main/java/pl/edu/mimuw/cloudatlas/querysigner/QueryData.java

diff --git a/build.gradle b/build.gradle
index c557cad..27279d4 100644
--- a/build.gradle
+++ b/build.gradle
@@ -65,6 +65,14 @@ ext.zonePath = {
     return System.getProperty("zonePath") ?: "/uw/violet07"
 }
 
+ext.publicKeyFilename = {
+    return System.getProperty("publicKeyFilename") ?: "build/tmp/query_signer.pub"
+}
+
+ext.privateKeyFilename = {
+    return System.getProperty("privateKeyFilename") ?: "build/tmp/query_signer"
+}
+
 repositories {
     // Use jcenter for resolving dependencies.
     // You can declare any Maven/Ivy/file repository here.
@@ -114,7 +122,7 @@ task runAgent(type: JavaExec) {
     systemProperty 'UDUPServer.bufsize', UDUPServerBufsize()
     systemProperty 'Gossip.zone_strategy', zoneSelectionStrategy()
     systemProperty 'zone_path', zonePath()
-    systemProperty 'query_signer_hostname', querySignerHostname()
+    systemProperty 'public_key_file', publicKeyFilename()
 }
 
 task runClient(type: JavaExec) {
@@ -142,4 +150,12 @@ task runQuerySigner(type: JavaExec) {
     classpath = sourceSets.main.runtimeClasspath
     main = 'pl.edu.mimuw.cloudatlas.querysigner.QuerySigner'
     systemProperty 'query_signer_hostname', querySignerHostname()
+    systemProperty 'public_key_file', publicKeyFilename()
+    systemProperty 'private_key_file', privateKeyFilename()
+}
+
+task runKeyGenerator(type: JavaExec) {
+    classpath = sourceSets.main.runtimeClasspath
+    main = 'pl.edu.mimuw.cloudatlas.KeyGenerator'
+    systemProperty 'query_signer_hostname', querySignerHostname()
 }
diff --git a/src/main/java/pl/edu/mimuw/cloudatlas/KeyGenerator.java b/src/main/java/pl/edu/mimuw/cloudatlas/KeyGenerator.java
index 8581280..8a474ac 100644
--- a/src/main/java/pl/edu/mimuw/cloudatlas/KeyGenerator.java
+++ b/src/main/java/pl/edu/mimuw/cloudatlas/KeyGenerator.java
@@ -1,16 +1,30 @@
 package pl.edu.mimuw.cloudatlas;
 
+import java.io.*;
 import java.security.*;
+import java.security.spec.X509EncodedKeySpec;
+import java.util.Base64;
 
 public class KeyGenerator {
     private final static int NUM_KEY_BITS = 1024;
     private final static String ENCRYPTION_ALGORITHM = "RSA";
 
     // TODO
-    // TODO read key values from files
-    // TODO gradlew
     private static void printKeyToFile(byte[] keyValue, String fileName) {
+        System.out.println("\n BEGIN KEY");
+        for (byte k : keyValue) {
+            System.out.print(k);
+        }
+        System.out.println("\n EOF KEY");
+        String keyString = new String(keyValue);
 
+        try {
+            BufferedWriter writer = new BufferedWriter(new FileWriter(fileName));
+            writer.write(keyString);
+            writer.close();
+        } catch (IOException e) {
+            e.printStackTrace();
+        }
     }
 
     private static void generateKeys() throws NoSuchAlgorithmException {
@@ -22,13 +36,48 @@ public class KeyGenerator {
         keyGenerator.initialize(NUM_KEY_BITS);
         KeyPair keyPair = keyGenerator.generateKeyPair();
 
+        String publicKeyFile = System.getProperty("public_key_file");
+        String privateKeyFile = System.getProperty("private_key_file");
+
         privateKey = keyPair.getPrivate();
-        printKeyToFile(privateKey.getEncoded(), "query_signer");
+        printKeyToFile(privateKey.getEncoded(), privateKeyFile);
         publicKey = keyPair.getPublic();
-        printKeyToFile(publicKey.getEncoded(), "query_signer.pub");
+        printKeyToFile(publicKey.getEncoded(), publicKeyFile);
+    }
+
+    public static PublicKey getPublicKey(String key){
+        try {
+            byte[] byteKey = Base64.getDecoder().decode(key.getBytes());
+            X509EncodedKeySpec X509publicKey = new X509EncodedKeySpec(byteKey);
+            KeyFactory kf = KeyFactory.getInstance(ENCRYPTION_ALGORITHM);
+            return kf.generatePublic(X509publicKey);
+        } catch(Exception e) {
+            e.printStackTrace();
+        }
+        return null;
+    }
+
+    public static PrivateKey getPrivateKey(String key){
+        try {
+            byte[] byteKey = Base64.getDecoder().decode(key.getBytes());
+            X509EncodedKeySpec X509publicKey = new X509EncodedKeySpec(byteKey);
+            KeyFactory kf = KeyFactory.getInstance(ENCRYPTION_ALGORITHM);
+            return kf.generatePrivate(X509publicKey);
+        } catch(Exception e) {
+            e.printStackTrace();
+        }
+        return null;
+    }
+
+    public static String readKeyFromFile(String filename) throws IOException {
+        String key;
+        BufferedReader reader = new BufferedReader(new FileReader(filename));
+        key = reader.readLine();
+        reader.close();
+        return key;
     }
 
-    public static void main() {
+    public static void main(String[] args) {
         try {
             generateKeys();
         } catch (NoSuchAlgorithmException e) {
diff --git a/src/main/java/pl/edu/mimuw/cloudatlas/querysigner/QueryData.java b/src/main/java/pl/edu/mimuw/cloudatlas/querysigner/QueryData.java
new file mode 100644
index 0000000..a09c823
--- /dev/null
+++ b/src/main/java/pl/edu/mimuw/cloudatlas/querysigner/QueryData.java
@@ -0,0 +1,4 @@
+package pl.edu.mimuw.cloudatlas.querysigner;
+
+public class QueryData {
+}
-- 
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