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authorMagdalena Grodzińska <mag.grodzinska@gmail.com>2020-01-12 21:05:28 +0100
committerMagdalena Grodzińska <mag.grodzinska@gmail.com>2020-01-12 21:05:28 +0100
commitda5df3957ba41d28256ab8183aae0dd3b6e0dcba (patch)
tree285a927acfcac8928f453215d9c6817de2a9c5af /src/main/java/pl/edu/mimuw/cloudatlas/querysigner
parentead50cfbb310feaaf6dfc7da6b59165428e4833a (diff)
Add query signer architecture
Diffstat (limited to 'src/main/java/pl/edu/mimuw/cloudatlas/querysigner')
-rw-r--r--src/main/java/pl/edu/mimuw/cloudatlas/querysigner/QuerySigner.java26
-rw-r--r--src/main/java/pl/edu/mimuw/cloudatlas/querysigner/QuerySignerApiImplementation.java112
2 files changed, 138 insertions, 0 deletions
diff --git a/src/main/java/pl/edu/mimuw/cloudatlas/querysigner/QuerySigner.java b/src/main/java/pl/edu/mimuw/cloudatlas/querysigner/QuerySigner.java
index e5e561d..69a25d7 100644
--- a/src/main/java/pl/edu/mimuw/cloudatlas/querysigner/QuerySigner.java
+++ b/src/main/java/pl/edu/mimuw/cloudatlas/querysigner/QuerySigner.java
@@ -1,4 +1,30 @@
package pl.edu.mimuw.cloudatlas.querysigner;
+import pl.edu.mimuw.cloudatlas.agent.EventBus;
+import pl.edu.mimuw.cloudatlas.api.Api;
+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 void runRegistry() {
+ try {
+ QuerySignerApiImplementation api = new QuerySignerApiImplementation();
+ 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..38a86c6
--- /dev/null
+++ b/src/main/java/pl/edu/mimuw/cloudatlas/querysigner/QuerySignerApiImplementation.java
@@ -0,0 +1,112 @@
+package pl.edu.mimuw.cloudatlas.querysigner;
+
+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.util.HashMap;
+import java.util.HashSet;
+import java.util.Map;
+import java.util.Set;
+
+public class QuerySignerApiImplementation implements QuerySignerApi {
+ private PublicKey publicKey;
+ private PrivateKey privateKey;
+ private final static String ENCRYPTION_ALGORITHM = "RSA";
+ private final static int NUM_KEY_BITS = 1024;
+ private Map<String, ValueQuery> queries;
+ private Set<String> attribsSetByQueries;
+
+ QuerySignerApiImplementation() {
+ this.queries = new HashMap<>();
+ this.attribsSetByQueries = new HashSet<>();
+ try {
+ generateKeys();
+ } catch (NoSuchAlgorithmException e) {
+ e.printStackTrace();
+ }
+ }
+
+ 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 void generateKeys() throws NoSuchAlgorithmException {
+ KeyPairGenerator keyGenerator =
+ KeyPairGenerator.getInstance(ENCRYPTION_ALGORITHM);
+ keyGenerator.initialize(NUM_KEY_BITS);
+ KeyPair keyPair = keyGenerator.generateKeyPair();
+ this.privateKey = keyPair.getPrivate();
+ this.publicKey = keyPair.getPublic();
+ }
+
+ private byte[] encryptQuery(String query) throws NoSuchPaddingException, NoSuchAlgorithmException, InvalidKeyException, BadPaddingException, IllegalBlockSizeException {
+ Cipher signCipher = Cipher.getInstance(ENCRYPTION_ALGORITHM);
+ signCipher.init(Cipher.ENCRYPT_MODE, privateKey);
+ byte[] encryptedBytes = signCipher.doFinal(query.getBytes());
+ System.out.println(
+ "Bytes encrypted with " + ENCRYPTION_ALGORITHM +
+ ": " + byteArrayToString(
+ encryptedBytes, 0, encryptedBytes.length));
+ return encryptedBytes;
+ }
+
+ private String 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 new String(decryptedBytes);
+ }
+
+ @Override
+ public byte[] signQuery(String queryName, String queryCode) throws RemoteException {
+ try {
+ return encryptQuery(queryName + queryCode);
+ } catch (NoSuchPaddingException | NoSuchAlgorithmException | InvalidKeyException | BadPaddingException | IllegalBlockSizeException e) {
+ e.printStackTrace();
+ throw new RemoteException(e.getLocalizedMessage());
+ }
+ }
+
+ @Override
+ public String checkQuery(byte[] encryptedQuery, String queryName, String queryCode) throws RemoteException {
+ try {
+ return decryptQuery(encryptedQuery);
+ } catch (NoSuchPaddingException | NoSuchAlgorithmException | BadPaddingException | IllegalBlockSizeException | InvalidKeyException e) {
+ e.printStackTrace();
+ throw new RemoteException(e.getLocalizedMessage());
+ }
+ }
+
+ @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();
+ }
+}