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-rw-r--r--src/main/java/pl/edu/mimuw/cloudatlas/ByteSerializer.java180
-rw-r--r--src/main/java/pl/edu/mimuw/cloudatlas/KeyGenerator.java38
-rw-r--r--src/main/java/pl/edu/mimuw/cloudatlas/agent/ApiImplementation.java13
-rw-r--r--src/main/java/pl/edu/mimuw/cloudatlas/agent/NewApiImplementation.java13
-rw-r--r--src/main/java/pl/edu/mimuw/cloudatlas/api/Api.java5
-rw-r--r--src/main/java/pl/edu/mimuw/cloudatlas/client/ClientController.java29
-rw-r--r--src/main/java/pl/edu/mimuw/cloudatlas/model/ValueQuery.java27
-rw-r--r--src/main/java/pl/edu/mimuw/cloudatlas/querysigner/QuerySigner.java36
-rw-r--r--src/main/java/pl/edu/mimuw/cloudatlas/querysigner/QuerySignerApiImplementation.java142
-rw-r--r--src/main/java/pl/edu/mimuw/cloudatlas/querysigner/QueryUtils.java16
-rw-r--r--src/main/java/pl/edu/mimuw/cloudatlas/querysignerapi/QuerySignerApi.java23
11 files changed, 493 insertions, 29 deletions
diff --git a/src/main/java/pl/edu/mimuw/cloudatlas/ByteSerializer.java b/src/main/java/pl/edu/mimuw/cloudatlas/ByteSerializer.java
new file mode 100644
index 0000000..0a86c0d
--- /dev/null
+++ b/src/main/java/pl/edu/mimuw/cloudatlas/ByteSerializer.java
@@ -0,0 +1,180 @@
+package pl.edu.mimuw.cloudatlas;
+
+import com.esotericsoftware.kryo.Kryo;
+import com.esotericsoftware.kryo.Serializer;
+import com.esotericsoftware.kryo.io.Input;
+import com.esotericsoftware.kryo.io.Output;
+import pl.edu.mimuw.cloudatlas.agent.messages.*;
+import pl.edu.mimuw.cloudatlas.agent.modules.ModuleType;
+import pl.edu.mimuw.cloudatlas.agent.modules.RecursiveScheduledTask;
+import pl.edu.mimuw.cloudatlas.agent.modules.TimerScheduledTask;
+import pl.edu.mimuw.cloudatlas.model.*;
+
+import java.io.ByteArrayInputStream;
+import java.io.ByteArrayOutputStream;
+import java.net.Inet4Address;
+import java.net.InetAddress;
+import java.net.UnknownHostException;
+import java.rmi.Remote;
+import java.util.ArrayList;
+import java.util.HashSet;
+import java.util.HashMap;
+import java.util.LinkedHashMap;
+
+/**
+ * Serializes classes to and from byte arrays
+ */
+// TODO remove udupserializer
+public class ByteSerializer {
+ private Kryo kryo;
+
+ public ByteSerializer() {
+ kryo = new Kryo();
+ kryo.setReferences(true);
+ kryo.setRegistrationRequired(true);
+ registerClasses();
+ }
+
+ private void registerClasses() {
+
+ kryo.register(Inet4Address.class, new Serializer() {
+
+ @Override
+ public void write(Kryo kryo, Output output, Object object) {
+ InetAddress ia = (InetAddress) object;
+ kryo.writeObject(output, ia.getAddress());
+ }
+
+ @Override
+ public Object read(Kryo kryo, Input input, Class type) {
+ try {
+ byte[] buf = kryo.readObject(input, byte[].class);
+ InetAddress addr = Inet4Address.getByAddress(buf);
+ return addr;
+ } catch (UnknownHostException e) {
+ System.out.println("Custom InetAddress read failed");
+ e.printStackTrace();
+ return null;
+ }
+ }
+ });
+
+ kryo.register(PathName.class, new Serializer() {
+
+ @Override
+ public void write(Kryo kryo, Output output, Object object) {
+ PathName pn = (PathName) object;
+ kryo.writeObject(output, pn.getName());
+ }
+
+ @Override
+ public Object read(Kryo kryo, Input input, Class type) {
+ String addr = input.readString();
+ return new PathName(addr);
+ }
+ });
+
+ kryo.register(ValueList.class, new Serializer() {
+ @Override
+ public void write(Kryo kryo, Output output, Object object) {
+ ValueList vl = (ValueList) object;
+ kryo.writeObject(output, ((TypeCollection) vl.getType()).getElementType());
+ kryo.writeObject(output, vl.getValue());
+ }
+
+ @Override
+ public Object read(Kryo kryo, Input input, Class type) {
+ Type t = kryo.readObject(input, Type.class);
+ ArrayList list = kryo.readObject(input, ArrayList.class);
+ return new ValueList(list, t);
+ }
+ });
+
+ kryo.register(ValueSet.class, new Serializer() {
+ @Override
+ public void write(Kryo kryo, Output output, Object object) {
+ ValueSet vs = (ValueSet) object;
+ kryo.writeObject(output, ((TypeCollection) vs.getType()).getElementType());
+ kryo.writeObject(output, vs.getValue());
+ }
+
+ @Override
+ public Object read(Kryo kryo, Input input, Class type) {
+ Type t = kryo.readObject(input, Type.class);
+ HashSet set = kryo.readObject(input, HashSet.class);
+ return new ValueSet(set, t);
+ }
+ });
+
+ // model
+ kryo.register(Value.class);
+ kryo.register(ValueBoolean.class);
+ kryo.register(ValueContact.class);
+ kryo.register(ValueDuration.class);
+ kryo.register(ValueInt.class);
+ kryo.register(ValueNull.class);
+ kryo.register(ValueQuery.class);
+ kryo.register(ValueSet.class);
+ kryo.register(ValueString.class);
+ kryo.register(ValueTime.class);
+ kryo.register(ValueUtils.class);
+ kryo.register(ZMI.class);
+
+ kryo.register(Attribute.class);
+ kryo.register(AttributesMap.class);
+ kryo.register(AttributesUtil.class);
+
+ kryo.register(Type.class);
+ kryo.register(TypeCollection.class);
+ kryo.register(TypePrimitive.class);
+
+ // messages in chronological order so it's easier to keep track
+ kryo.register(AgentMessage.class);
+ kryo.register(AttributesMessage.class);
+ kryo.register(GetStateMessage.class);
+ kryo.register(HejkaMessage.class);
+ kryo.register(NoCoTamMessage.class);
+ kryo.register(QueryMessage.class);
+ kryo.register(QurnikMessage.class);
+ kryo.register(RemikMessage.class);
+ kryo.register(RemoveZMIMessage.class);
+ kryo.register(RequestStateMessage.class);
+ kryo.register(ResponseMessage.class);
+ kryo.register(RunQueriesMessage.class);
+ kryo.register(SetAttributeMessage.class);
+ kryo.register(StanikMessage.Type.class);
+ kryo.register(StanikMessage.class);
+ kryo.register(TimerSchedulerMessage.class);
+ kryo.register(UDUPMessage.class);
+ kryo.register(UpdateAttributesMessage.class);
+ kryo.register(UpdateQueriesMessage.class);
+ kryo.register(GossipGirlMessage.class);
+ kryo.register(GossipGirlMessage.Type.class);
+ kryo.register(RemoteGossipGirlMessage.class);
+
+ // modules
+ kryo.register(TimerScheduledTask.class);
+ kryo.register(RecursiveScheduledTask.class);
+
+ // other
+ kryo.register(byte[].class);
+ kryo.register(LinkedHashMap.class);
+ kryo.register(HashMap.class);
+ kryo.register(ModuleType.class);
+ }
+
+ public Object deserialize(byte[] packetData, Class objClass) {
+ ByteArrayInputStream in = new ByteArrayInputStream(packetData);
+ Input kryoInput = new Input(in);
+ return kryo.readObject(kryoInput, objClass);
+ }
+
+ public byte[] serialize(Object obj) {
+ ByteArrayOutputStream out = new ByteArrayOutputStream();
+ Output kryoOut = new Output(out);
+ kryo.writeObject(kryoOut, obj);
+ kryoOut.flush();
+ kryoOut.close();
+ return out.toByteArray();
+ }
+}
diff --git a/src/main/java/pl/edu/mimuw/cloudatlas/KeyGenerator.java b/src/main/java/pl/edu/mimuw/cloudatlas/KeyGenerator.java
new file mode 100644
index 0000000..8581280
--- /dev/null
+++ b/src/main/java/pl/edu/mimuw/cloudatlas/KeyGenerator.java
@@ -0,0 +1,38 @@
+package pl.edu.mimuw.cloudatlas;
+
+import java.security.*;
+
+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) {
+
+ }
+
+ private static void generateKeys() throws NoSuchAlgorithmException {
+ PublicKey publicKey;
+ PrivateKey privateKey;
+
+ KeyPairGenerator keyGenerator =
+ KeyPairGenerator.getInstance(ENCRYPTION_ALGORITHM);
+ keyGenerator.initialize(NUM_KEY_BITS);
+ KeyPair keyPair = keyGenerator.generateKeyPair();
+
+ privateKey = keyPair.getPrivate();
+ printKeyToFile(privateKey.getEncoded(), "query_signer");
+ publicKey = keyPair.getPublic();
+ printKeyToFile(publicKey.getEncoded(), "query_signer.pub");
+ }
+
+ public static void main() {
+ try {
+ generateKeys();
+ } catch (NoSuchAlgorithmException e) {
+ e.printStackTrace();
+ }
+ }
+}
diff --git a/src/main/java/pl/edu/mimuw/cloudatlas/agent/ApiImplementation.java b/src/main/java/pl/edu/mimuw/cloudatlas/agent/ApiImplementation.java
index d2e808a..e9dbb7e 100644
--- a/src/main/java/pl/edu/mimuw/cloudatlas/agent/ApiImplementation.java
+++ b/src/main/java/pl/edu/mimuw/cloudatlas/agent/ApiImplementation.java
@@ -28,6 +28,7 @@ import pl.edu.mimuw.cloudatlas.model.Type;
import pl.edu.mimuw.cloudatlas.model.TypePrimitive;
import pl.edu.mimuw.cloudatlas.model.ZMI;
import pl.edu.mimuw.cloudatlas.api.Api;
+import pl.edu.mimuw.cloudatlas.querysigner.QueryUtils;
public class ApiImplementation implements Api {
ZMI root;
@@ -60,14 +61,9 @@ public class ApiImplementation implements Api {
}
}
- public void installQuery(String name, String queryCode) throws RemoteException {
- Pattern queryNamePattern = Pattern.compile("&[a-zA-Z][\\w_]*");
- Matcher matcher = queryNamePattern.matcher(name);
- if (!matcher.matches()) {
- throw new RemoteException("Invalid query identifier");
- }
+ public void installQuery(String name, ValueQuery query) throws RemoteException {
+ QueryUtils.validateQueryName(name);
try {
- ValueQuery query = new ValueQuery(queryCode);
Attribute attributeName = new Attribute(name);
installQueryInHierarchy(root, attributeName, query);
executeAllQueries(root);
@@ -85,7 +81,8 @@ public class ApiImplementation implements Api {
}
}
- public void uninstallQuery(String queryName) throws RemoteException {
+ public void uninstallQuery(String queryName, ValueQuery query) throws RemoteException {
+ QueryUtils.validateQueryName(queryName);
uninstallQueryInHierarchy(root, new Attribute(queryName));
}
diff --git a/src/main/java/pl/edu/mimuw/cloudatlas/agent/NewApiImplementation.java b/src/main/java/pl/edu/mimuw/cloudatlas/agent/NewApiImplementation.java
index b293446..bf75210 100644
--- a/src/main/java/pl/edu/mimuw/cloudatlas/agent/NewApiImplementation.java
+++ b/src/main/java/pl/edu/mimuw/cloudatlas/agent/NewApiImplementation.java
@@ -22,6 +22,7 @@ import pl.edu.mimuw.cloudatlas.interpreter.Main;
import pl.edu.mimuw.cloudatlas.interpreter.QueryResult;
import pl.edu.mimuw.cloudatlas.model.*;
import pl.edu.mimuw.cloudatlas.api.Api;
+import pl.edu.mimuw.cloudatlas.querysigner.QueryUtils;
public class NewApiImplementation implements Api {
private EventBus eventBus;
@@ -79,14 +80,9 @@ public class NewApiImplementation implements Api {
}
}
- public void installQuery(String name, String queryCode) throws RemoteException {
- Pattern queryNamePattern = Pattern.compile("&[a-zA-Z][\\w_]*");
- Matcher matcher = queryNamePattern.matcher(name);
- if (!matcher.matches()) {
- throw new RemoteException("Invalid query identifier");
- }
+ public void installQuery(String name, ValueQuery query) throws RemoteException {
+ QueryUtils.validateQueryName(name);
try {
- ValueQuery query = new ValueQuery(queryCode);
Attribute attributeName = new Attribute(name);
ValueTime timestamp = new ValueTime(System.currentTimeMillis());
Map<Attribute, Entry<ValueQuery, ValueTime>> queries = new HashMap();
@@ -98,7 +94,8 @@ public class NewApiImplementation implements Api {
}
}
- public void uninstallQuery(String queryName) throws RemoteException {
+ public void uninstallQuery(String queryName, ValueQuery query) throws RemoteException {
+ QueryUtils.validateQueryName(queryName);
try {
Attribute attributeName = new Attribute(queryName);
ValueTime timestamp = new ValueTime(System.currentTimeMillis());
diff --git a/src/main/java/pl/edu/mimuw/cloudatlas/api/Api.java b/src/main/java/pl/edu/mimuw/cloudatlas/api/Api.java
index c62ee39..2936b13 100644
--- a/src/main/java/pl/edu/mimuw/cloudatlas/api/Api.java
+++ b/src/main/java/pl/edu/mimuw/cloudatlas/api/Api.java
@@ -6,6 +6,7 @@ import java.rmi.RemoteException;
import pl.edu.mimuw.cloudatlas.model.Value;
import pl.edu.mimuw.cloudatlas.model.ValueContact;
import pl.edu.mimuw.cloudatlas.model.AttributesMap;
+import pl.edu.mimuw.cloudatlas.model.ValueQuery;
/**
*
@@ -27,9 +28,9 @@ public interface Api extends Remote {
public AttributesMap getZoneAttributeValues(String zoneName) throws RemoteException;
- public void installQuery(String queryName, String query) throws RemoteException;
+ public void installQuery(String queryName, ValueQuery query) throws RemoteException;
- public void uninstallQuery(String queryName) throws RemoteException;
+ public void uninstallQuery(String queryName, ValueQuery query) throws RemoteException;
public void setAttributeValue(String zoneName, String attributeName, Value value) throws RemoteException;
diff --git a/src/main/java/pl/edu/mimuw/cloudatlas/client/ClientController.java b/src/main/java/pl/edu/mimuw/cloudatlas/client/ClientController.java
index 4019696..56b478c 100644
--- a/src/main/java/pl/edu/mimuw/cloudatlas/client/ClientController.java
+++ b/src/main/java/pl/edu/mimuw/cloudatlas/client/ClientController.java
@@ -7,6 +7,7 @@ import org.springframework.web.bind.annotation.*;
import org.springframework.stereotype.Controller;
import pl.edu.mimuw.cloudatlas.api.Api;
import pl.edu.mimuw.cloudatlas.model.*;
+import pl.edu.mimuw.cloudatlas.querysignerapi.QuerySignerApi;
import java.net.InetAddress;
import java.rmi.registry.LocateRegistry;
@@ -32,17 +33,21 @@ import java.util.*;
@Controller
public class ClientController {
- private Api api;
-
+ private Api agentApi;
+ private QuerySignerApi querySignerApi;
private Map<ValueTime, AttributesMap> attributes;
private String currentZoneName;
private static final int MAX_ENTRIES = 10;
ClientController() {
try {
- String hostname = System.getProperty("agent_hostname");
- Registry registry = LocateRegistry.getRegistry(hostname);
- this.api = (Api) registry.lookup("Api");
+ String agentHostname = System.getProperty("agent_hostname");
+ Registry registry = LocateRegistry.getRegistry(agentHostname);
+ this.agentApi = (Api) registry.lookup("Api");
+
+ String querySignerHostname = System.getProperty("querysigner_hostname");
+ Registry querySignerRegistry = LocateRegistry.getRegistry(querySignerHostname);
+ this.querySignerApi = (QuerySignerApi) querySignerRegistry.lookup("QuerySignerApi");
} catch (Exception e) {
System.err.println("Client exception:");
e.printStackTrace();
@@ -74,7 +79,8 @@ public class ClientController {
boolean success = true;
try {
- this.api.installQuery(queryObject.getName(), queryObject.getValue());
+ ValueQuery query = this.querySignerApi.signInstallQuery(queryObject.getName(), queryObject.getValue());
+ this.agentApi.installQuery(queryObject.getName(), query);
} catch (Exception e) {
success = false;
System.err.println("Client exception:");
@@ -99,7 +105,8 @@ public class ClientController {
boolean success = true;
try {
- this.api.uninstallQuery(queryObject.getName());
+ ValueQuery query = querySignerApi.signUninstallQuery(queryObject.getName());
+ this.agentApi.uninstallQuery(queryObject.getName(), query);
} catch (Exception e) {
success = false;
System.err.println("Client exception:");
@@ -153,7 +160,7 @@ public class ClientController {
try {
contactObjects = parseContactsString(contactsObject);
- this.api.setFallbackContacts(contactObjects);
+ this.agentApi.setFallbackContacts(contactObjects);
} catch (Exception e) {
success = false;
System.err.println("Client exception:");
@@ -284,7 +291,7 @@ public class ClientController {
try {
attributeValue = parseAttributeValue(attributeObject);
- api.setAttributeValue(
+ agentApi.setAttributeValue(
attributeObject.getZoneName(),
attributeObject.getAttributeName(),
attributeValue);
@@ -309,7 +316,7 @@ public class ClientController {
String availableZonesString = "";
try {
- availableZones = api.getZoneSet();
+ availableZones = agentApi.getZoneSet();
availableZonesString = availableZones.toString().substring(1, availableZones.toString().length() - 1);
} catch (Exception e) {
success = false;
@@ -336,7 +343,7 @@ public class ClientController {
try {
if (!this.currentZoneName.isEmpty()) {
- attribData = api.getZoneAttributeValues(this.currentZoneName);
+ attribData = agentApi.getZoneAttributeValues(this.currentZoneName);
currentTime = new ValueTime(System.currentTimeMillis());
this.attributes.put(currentTime, attribData);
}
diff --git a/src/main/java/pl/edu/mimuw/cloudatlas/model/ValueQuery.java b/src/main/java/pl/edu/mimuw/cloudatlas/model/ValueQuery.java
index 6d233ea..c5d4b54 100644
--- a/src/main/java/pl/edu/mimuw/cloudatlas/model/ValueQuery.java
+++ b/src/main/java/pl/edu/mimuw/cloudatlas/model/ValueQuery.java
@@ -15,6 +15,11 @@ public class ValueQuery extends Value {
private String code;
// Parsed query
private Program query;
+ // Query signature
+ private byte[] signature;
+ // Query signing timestamp
+ private long timestamp;
+
/**
* Constructs a new <code>ValueQuery</code> object.
*
@@ -25,11 +30,23 @@ public class ValueQuery extends Value {
this.code = query;
Yylex lex = new Yylex(new ByteArrayInputStream(query.getBytes()));
this.query = (new parser(lex)).pProgram();
+ this.signature = null;
+ this.timestamp = System.currentTimeMillis();
+ }
+
+ public ValueQuery(String query, byte[] querySignature) throws Exception {
+ this.code = query;
+ Yylex lex = new Yylex(new ByteArrayInputStream(query.getBytes()));
+ this.query = (new parser(lex)).pProgram();
+ this.signature = querySignature;
+ this.timestamp = System.currentTimeMillis();
}
private ValueQuery() {
this.code = null;
this.query = null;
+ this.signature = null;
+ this.timestamp = System.currentTimeMillis();
}
public String getCode() { return code; }
@@ -38,6 +55,16 @@ public class ValueQuery extends Value {
return query;
}
+ public byte[] getSignature() { return signature; }
+
+ public long getTimestamp() { return timestamp; }
+
+ public void setTimestamp(long timestamp) { this.timestamp = timestamp; }
+
+ public String getCode() {
+ return code;
+ }
+
@Override
public Type getType() {
return TypePrimitive.QUERY;
diff --git a/src/main/java/pl/edu/mimuw/cloudatlas/querysigner/QuerySigner.java b/src/main/java/pl/edu/mimuw/cloudatlas/querysigner/QuerySigner.java
new file mode 100644
index 0000000..90a86b7
--- /dev/null
+++ b/src/main/java/pl/edu/mimuw/cloudatlas/querysigner/QuerySigner.java
@@ -0,0 +1,36 @@
+package pl.edu.mimuw.cloudatlas.querysigner;
+
+import pl.edu.mimuw.cloudatlas.querysignerapi.QuerySignerApi;
+
+import java.rmi.registry.LocateRegistry;
+import java.rmi.registry.Registry;
+import java.rmi.server.UnicastRemoteObject;
+
+public class QuerySigner {
+ public static class InvalidQueryException extends Exception {
+ InvalidQueryException() {
+ super("Query invalid");
+ }
+ }
+
+ public static void runRegistry() {
+ try {
+ // TODO reading from files
+ String publicKey = System.getProperty("public_key");
+ String privateKey = System.getProperty("private_key");
+ QuerySignerApiImplementation api = new QuerySignerApiImplementation(publicKey.getBytes(), privateKey.getBytes());
+ QuerySignerApi apiStub =
+ (QuerySignerApi) UnicastRemoteObject.exportObject(api, 0);
+ Registry registry = LocateRegistry.getRegistry();
+ registry.rebind("QuerySignerApi", apiStub);
+ System.out.println("QuerySigner: api bound");
+ } catch (Exception e) {
+ System.err.println("QuerySigner registry initialization exception:");
+ e.printStackTrace();
+ }
+ }
+
+ public static void main(String[] args) {
+ runRegistry();
+ }
+}
diff --git a/src/main/java/pl/edu/mimuw/cloudatlas/querysigner/QuerySignerApiImplementation.java b/src/main/java/pl/edu/mimuw/cloudatlas/querysigner/QuerySignerApiImplementation.java
new file mode 100644
index 0000000..d1c0e7c
--- /dev/null
+++ b/src/main/java/pl/edu/mimuw/cloudatlas/querysigner/QuerySignerApiImplementation.java
@@ -0,0 +1,142 @@
+package pl.edu.mimuw.cloudatlas.querysigner;
+
+import pl.edu.mimuw.cloudatlas.ByteSerializer;
+import pl.edu.mimuw.cloudatlas.model.ValueQuery;
+import pl.edu.mimuw.cloudatlas.querysignerapi.QuerySignerApi;
+
+import javax.crypto.BadPaddingException;
+import javax.crypto.Cipher;
+import javax.crypto.IllegalBlockSizeException;
+import javax.crypto.NoSuchPaddingException;
+import java.rmi.RemoteException;
+import java.security.*;
+import java.security.interfaces.RSAPrivateCrtKey;
+import java.util.HashMap;
+import java.util.HashSet;
+import java.util.Map;
+import java.util.Set;
+
+public class QuerySignerApiImplementation implements QuerySignerApi {
+ private final static String ENCRYPTION_ALGORITHM = "RSA";
+ private final static String DIGEST_ALGORITHM = "SHA-256";
+ private PublicKey publicKey;
+ private PrivateKey privateKey;
+ private Map<String, ValueQuery> queries;
+ private Set<String> attribsSetByQueries;
+ private ByteSerializer byteSerializer;
+
+ QuerySignerApiImplementation(byte[] serializedPublicKey, byte[] serializedPrivateKey) {
+ this.byteSerializer = new ByteSerializer();
+ this.publicKey = (PublicKey) byteSerializer.deserialize(serializedPublicKey, PublicKey.class);
+ this.privateKey = (PrivateKey) byteSerializer.deserialize(serializedPrivateKey, PrivateKey.class);
+ this.queries = new HashMap<>();
+ this.attribsSetByQueries = new HashSet<>();
+ }
+
+ private String byteArrayToString(byte[] arr, int offset, int len) {
+ StringBuffer sb = new StringBuffer();
+ for (int i = offset, n = Math.min(arr.length, offset + len); i < n; ++i) {
+ String hex = Integer.toHexString(0xFF & arr[i]);
+ if (hex.length() < 2) {
+ sb.append('0');
+ }
+ sb.append(hex);
+ }
+ return sb.toString();
+ }
+
+ private byte[] encryptQuery(byte[] query) throws NoSuchPaddingException, NoSuchAlgorithmException, InvalidKeyException, BadPaddingException, IllegalBlockSizeException {
+ Cipher signCipher = Cipher.getInstance(ENCRYPTION_ALGORITHM);
+ signCipher.init(Cipher.ENCRYPT_MODE, privateKey);
+ byte[] encryptedBytes = signCipher.doFinal(query);
+ System.out.println(
+ "Bytes encrypted with " + ENCRYPTION_ALGORITHM +
+ ": " + byteArrayToString(
+ encryptedBytes, 0, encryptedBytes.length));
+ return encryptedBytes;
+ }
+
+ private byte[] decryptQuery(byte[] encryptedQuery) throws NoSuchPaddingException, NoSuchAlgorithmException, BadPaddingException, IllegalBlockSizeException, InvalidKeyException {
+ Cipher verifyCipher = Cipher.getInstance(ENCRYPTION_ALGORITHM);
+ verifyCipher.init(Cipher.DECRYPT_MODE, publicKey);
+ byte[] decryptedBytes = verifyCipher.doFinal(encryptedQuery);
+ System.out.println(
+ "Bytes decrypted with " + ENCRYPTION_ALGORITHM +
+ ": " + byteArrayToString(
+ decryptedBytes, 0, decryptedBytes.length));
+ return decryptedBytes;
+ }
+
+ private byte[] cryptographicHash(byte[] serializedQuery) throws NoSuchAlgorithmException {
+ MessageDigest digestGenerator =
+ MessageDigest.getInstance(DIGEST_ALGORITHM);
+ byte[] digest = digestGenerator.digest(serializedQuery);
+ System.out.println(
+ DIGEST_ALGORITHM + " digest: " +
+ byteArrayToString(
+ digest, 0, digest.length));
+ return digest;
+ }
+
+ // TODO
+ private byte[] serializeQuery(String queryName, String queryCode) {
+ return byteSerializer.serialize(queryName + queryCode);
+ }
+
+ @Override
+ public ValueQuery signInstallQuery(String queryName, String queryCode) throws RemoteException {
+ QueryUtils.validateQueryName(queryName);
+ try {
+ byte[] serializedQuery = serializeQuery(queryName, queryCode);
+ byte[] hashedQuery = cryptographicHash(serializedQuery);
+ byte[] querySignature = encryptQuery(hashedQuery);
+ return new ValueQuery(queryCode, querySignature);
+ } catch (Exception e) {
+ e.printStackTrace();
+ throw new RemoteException(e.getLocalizedMessage());
+ }
+ }
+
+ @Override
+ public void validateInstallQuery(String queryName, ValueQuery query) throws RemoteException {
+ QueryUtils.validateQueryName(queryName);
+ try {
+ byte[] decryptedQuery = decryptQuery(query.getSignature());
+ byte[] serializedQuery = serializeQuery(queryName, query.getCode());
+ byte[] hashedSerializedQuery = cryptographicHash(serializedQuery);
+ if (hashedSerializedQuery != decryptedQuery) {
+ throw new QuerySigner.InvalidQueryException();
+ }
+ } catch (NoSuchPaddingException | NoSuchAlgorithmException | BadPaddingException | IllegalBlockSizeException | InvalidKeyException | QuerySigner.InvalidQueryException e) {
+ e.printStackTrace();
+ throw new RemoteException(e.getLocalizedMessage());
+ }
+ }
+
+ // TODO
+ @Override
+ public ValueQuery signUninstallQuery(String queryName) throws RemoteException {
+ return null;
+ }
+
+ // TODO
+ @Override
+ public void validateUninstallQuery(String queryName, ValueQuery query) throws RemoteException {
+
+ }
+
+ @Override
+ public PublicKey getPublicKey() throws RemoteException {
+ return publicKey;
+ }
+
+ @Override
+ public void setPublicKey(PublicKey publicKey) throws RemoteException {
+ this.publicKey = publicKey;
+ }
+
+ @Override
+ public byte[] getQuerySignature(String queryName) throws RemoteException {
+ return queries.get(queryName).getSignature();
+ }
+}
diff --git a/src/main/java/pl/edu/mimuw/cloudatlas/querysigner/QueryUtils.java b/src/main/java/pl/edu/mimuw/cloudatlas/querysigner/QueryUtils.java
new file mode 100644
index 0000000..6ec62f4
--- /dev/null
+++ b/src/main/java/pl/edu/mimuw/cloudatlas/querysigner/QueryUtils.java
@@ -0,0 +1,16 @@
+package pl.edu.mimuw.cloudatlas.querysigner;
+
+import java.rmi.RemoteException;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+
+public class QueryUtils {
+
+ public static void validateQueryName(String queryName) throws RemoteException {
+ Pattern queryNamePattern = Pattern.compile("&[a-zA-Z][\\w_]*");
+ Matcher matcher = queryNamePattern.matcher(queryName);
+ if (!matcher.matches()) {
+ throw new RemoteException("Invalid query identifier");
+ }
+ }
+}
diff --git a/src/main/java/pl/edu/mimuw/cloudatlas/querysignerapi/QuerySignerApi.java b/src/main/java/pl/edu/mimuw/cloudatlas/querysignerapi/QuerySignerApi.java
new file mode 100644
index 0000000..fa46da3
--- /dev/null
+++ b/src/main/java/pl/edu/mimuw/cloudatlas/querysignerapi/QuerySignerApi.java
@@ -0,0 +1,23 @@
+package pl.edu.mimuw.cloudatlas.querysignerapi;
+
+import pl.edu.mimuw.cloudatlas.model.ValueQuery;
+
+import java.rmi.Remote;
+import java.rmi.RemoteException;
+import java.security.PublicKey;
+
+public interface QuerySignerApi extends Remote {
+ public ValueQuery signInstallQuery(String queryName, String queryCode) throws RemoteException;
+
+ public ValueQuery signUninstallQuery(String queryName) throws RemoteException;
+
+ public void validateInstallQuery(String queryName, ValueQuery query) throws RemoteException;
+
+ public void validateUninstallQuery(String queryName, ValueQuery query) throws RemoteException;
+
+ public PublicKey getPublicKey() throws RemoteException;
+
+ public void setPublicKey(PublicKey publicKey) throws RemoteException;
+
+ public byte[] getQuerySignature(String queryName) throws RemoteException;
+}