From 93cafafbc6fe53628be1b4ef08b6d9ca48ec6bc9 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Magdalena=20Grodzi=C5=84ska?= <mag.grodzinska@gmail.com>
Date: Tue, 14 Jan 2020 22:50:10 +0100
Subject: Add validation in Stanik

---
 .../mimuw/cloudatlas/agent/modules/GossipGirl.java |  1 +
 .../edu/mimuw/cloudatlas/agent/modules/Stanik.java | 31 ++++++++++++++++++++++
 .../mimuw/cloudatlas/querysigner/QueryData.java    |  7 +++++
 .../mimuw/cloudatlas/querysigner/QueryUtils.java   | 11 ++++++++
 4 files changed, 50 insertions(+)

diff --git a/src/main/java/pl/edu/mimuw/cloudatlas/agent/modules/GossipGirl.java b/src/main/java/pl/edu/mimuw/cloudatlas/agent/modules/GossipGirl.java
index 5137e0b..a952274 100644
--- a/src/main/java/pl/edu/mimuw/cloudatlas/agent/modules/GossipGirl.java
+++ b/src/main/java/pl/edu/mimuw/cloudatlas/agent/modules/GossipGirl.java
@@ -26,6 +26,7 @@ import pl.edu.mimuw.cloudatlas.model.ValueContact;
 import pl.edu.mimuw.cloudatlas.model.ValueQuery;
 import pl.edu.mimuw.cloudatlas.model.ValueTime;
 import pl.edu.mimuw.cloudatlas.model.ZMI;
+import pl.edu.mimuw.cloudatlas.querysigner.QuerySignerApiImplementation;
 
 public class GossipGirl extends Module {
     private long nextGossipId = 0;
diff --git a/src/main/java/pl/edu/mimuw/cloudatlas/agent/modules/Stanik.java b/src/main/java/pl/edu/mimuw/cloudatlas/agent/modules/Stanik.java
index 79728b5..efc5605 100644
--- a/src/main/java/pl/edu/mimuw/cloudatlas/agent/modules/Stanik.java
+++ b/src/main/java/pl/edu/mimuw/cloudatlas/agent/modules/Stanik.java
@@ -1,12 +1,21 @@
 package pl.edu.mimuw.cloudatlas.agent.modules;
 
 import java.nio.file.Path;
+import java.rmi.RemoteException;
+import java.security.InvalidKeyException;
+import java.security.NoSuchAlgorithmException;
+import java.security.PublicKey;
 import java.util.*;
 import java.util.AbstractMap.SimpleImmutableEntry;
 import java.util.Map.Entry;
 
 import pl.edu.mimuw.cloudatlas.agent.messages.*;
 import pl.edu.mimuw.cloudatlas.model.*;
+import pl.edu.mimuw.cloudatlas.querysigner.*;
+
+import javax.crypto.BadPaddingException;
+import javax.crypto.IllegalBlockSizeException;
+import javax.crypto.NoSuchPaddingException;
 
 public class Stanik extends Module {
     private class InvalidUpdateAttributesMessage extends Exception {
@@ -21,6 +30,7 @@ public class Stanik extends Module {
     private Set<ValueContact> contacts;
     private ValueTime contactsTimestamp;
     private PathName ourPath;
+    private PublicKey publicKey;
 
     public Stanik(PathName ourPath, long freshnessPeriod) {
         super(ModuleType.STATE);
@@ -31,6 +41,8 @@ public class Stanik extends Module {
         this.freshnessPeriod = freshnessPeriod;
         this.contactsTimestamp = ValueUtils.currentTime();
         this.contacts = new HashSet<>();
+        String publicKeyFile = System.getProperty("public_key_file");
+        this.publicKey = KeyUtils.getPublicKey(publicKeyFile);
         setDefaultQueries();
     }
 
@@ -213,6 +225,25 @@ public class Stanik extends Module {
         System.out.println("INFO: Stanik handles update queries");
         for (Entry<Attribute, ValueQuery> entry : message.getQueries().entrySet()) {
             Attribute attribute = entry.getKey();
+            ValueQuery query = entry.getValue();
+            try {
+                if (query.isInstalled()) {
+                        QuerySignerApiImplementation.validateInstallQuery(
+                                attribute.getName(),
+                                QueryUtils.constructQueryData(query),
+                                this.publicKey);
+
+                } else {
+                    QuerySignerApiImplementation.validateUninstallQuery(
+                            attribute.getName(),
+                            QueryUtils.constructQueryData(query),
+                            this.publicKey);
+                }
+            } catch (RemoteException | IllegalBlockSizeException | InvalidKeyException | BadPaddingException | NoSuchAlgorithmException | NoSuchPaddingException | QuerySigner.InvalidQueryException e) {
+                System.out.println("ERROR: Query " + attribute.getName() + " was not updated in Stanik with error message " + e.getMessage());
+                e.printStackTrace();
+                continue;
+            }
             ValueTime timestamp = new ValueTime(entry.getValue().getTimestamp());
             ValueQuery currentTimestampedQuery = queries.get(attribute);
             if (currentTimestampedQuery == null ||
diff --git a/src/main/java/pl/edu/mimuw/cloudatlas/querysigner/QueryData.java b/src/main/java/pl/edu/mimuw/cloudatlas/querysigner/QueryData.java
index 87b965c..a9e039e 100644
--- a/src/main/java/pl/edu/mimuw/cloudatlas/querysigner/QueryData.java
+++ b/src/main/java/pl/edu/mimuw/cloudatlas/querysigner/QueryData.java
@@ -19,6 +19,13 @@ public class QueryData implements Serializable {
         this.installed = true;
     }
 
+    public QueryData(String code, byte[] signature, long timestamp, boolean installed) {
+        this.code = code;
+        this.signature = signature;
+        this.timestamp = timestamp;
+        this.installed = installed;
+    }
+
     public String getCode() {
         return code;
     }
diff --git a/src/main/java/pl/edu/mimuw/cloudatlas/querysigner/QueryUtils.java b/src/main/java/pl/edu/mimuw/cloudatlas/querysigner/QueryUtils.java
index 6ec62f4..c46e32d 100644
--- a/src/main/java/pl/edu/mimuw/cloudatlas/querysigner/QueryUtils.java
+++ b/src/main/java/pl/edu/mimuw/cloudatlas/querysigner/QueryUtils.java
@@ -1,5 +1,7 @@
 package pl.edu.mimuw.cloudatlas.querysigner;
 
+import pl.edu.mimuw.cloudatlas.model.ValueQuery;
+
 import java.rmi.RemoteException;
 import java.util.regex.Matcher;
 import java.util.regex.Pattern;
@@ -13,4 +15,13 @@ public class QueryUtils {
             throw new RemoteException("Invalid query identifier");
         }
     }
+
+    public static QueryData constructQueryData(ValueQuery valueQuery) {
+        return new QueryData(
+                valueQuery.getCode(),
+                valueQuery.getSignature(),
+                valueQuery.getTimestamp(),
+                valueQuery.isInstalled()
+        );
+    }
 }
-- 
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