-
-
-
+#include "CloudComm.h"
+#include "TimingSingleton.h"
+#include "SecureRandom.h"
+#include "IoTString.h"
+#include "Error.h"
+#include "URL.h"
/**
- * This class provides a communication API to the webserver. It also
- * validates the HMACs on the slots and handles encryption.
- * @author Brian Demsky <bdemsky@uci.edu>
- * @version 1.0
+ * Empty Constructor needed for child class.
*/
+CloudComm::CloudComm() :
+ baseurl(NULL),
+ key(NULL),
+ mac(NULL),
+ password(NULL),
+ random(NULL),
+ salt(NULL),
+ table(NULL),
+ listeningPort(-1),
+ localServerThread(NULL),
+ doEnd(false),
+ timer(TimingSingleton_getInstance())
+{
+}
-
-class CloudComm {
- static final int SALT_SIZE = 8;
- static final int TIMEOUT_MILLIS = 5000; // 100
- static final int IV_SIZE = 16;
-
- /** Sets the size for the HMAC. */
- static final int HMAC_SIZE = 32;
-
- String baseurl;
- SecretKeySpec key;
- Mac mac;
- String password;
- SecureRandom random;
- char salt[];
- Table table;
- int listeningPort = -1;
- Thread localServerThread = NULL;
- bool doEnd = false;
-
- TimingSingleton timer = NULL;
-
- /**
- * Empty Constructor needed for child class.
- */
- CloudComm() {
- timer = TimingSingleton.getInstance();
- }
-
- /**
- * Constructor for actual use. Takes in the url and password.
- */
- CloudComm(Table _table, String _baseurl, String _password, int _listeningPort) {
- timer = TimingSingleton.getInstance();
- this.table = _table;
- this.baseurl = _baseurl;
- this.password = _password;
- this.random = new SecureRandom();
- this.listeningPort = _listeningPort;
-
- if (this.listeningPort > 0) {
- localServerThread = new Thread(new Runnable() {
- void run() {
- localServerWorkerFunction();
- }
- });
- localServerThread.start();
- }
+/**
+ * Constructor for actual use. Takes in the url and password.
+ */
+CloudComm::CloudComm(Table *_table, IoTString *_baseurl, IoTString *_password, int _listeningPort) :
+ baseurl(_baseurl),
+ key(NULL),
+ mac(NULL),
+ password(_password),
+ random(new SecureRandom()),
+ salt(NULL),
+ table(_table),
+ listeningPort(_listeningPort),
+ localServerThread(NULL),
+ doEnd(false),
+ timer(TimingSingleton_getInstance()) {
+ if (listeningPort > 0) {
+ localServerThread = new Thread(new Runnable() {
+ void run() {
+ localServerWorkerFunction();
+ }
+ });
+ localServerThread->start();
}
+}
- /**
- * Generates Key from password.
- */
- SecretKeySpec initKey() {
- try {
- PBEKeySpec keyspec = new PBEKeySpec(password.toCharArray(),
- salt,
- 65536,
- 128);
- SecretKey tmpkey = SecretKeyFactory.getInstance("PBKDF2WithHmacSHA256").generateSecret(keyspec);
- return new SecretKeySpec(tmpkey.getEncoded(), "AES");
- } catch (Exception e) {
- e.printStackTrace();
- throw new Error("Failed generating key.");
- }
+/**
+ * Generates Key from password.
+ */
+SecretKeySpec *CloudComm::initKey() {
+ try {
+ PBEKeySpec *keyspec = new PBEKeySpec(password->internalBytes(),
+ salt,
+ 65536,
+ 128);
+ SecretKey *tmpkey = SecretKeyFactory_getInstance("PBKDF2WithHmacSHA256")->generateSecret(keyspec);
+ return new SecretKeySpec(tmpkey->getEncoded(), "AES");
+ } catch (Exception *e) {
+ throw new Error("Failed generating key.");
}
+}
- /**
- * Inits all the security stuff
- */
- void initSecurity() throws ServerException {
- // try to get the salt and if one does not exist set one
- if (!getSalt()) {
- //Set the salt
- setSalt();
- }
+/**
+ * Inits all the security stuff
+ */
- initCrypt();
+void CloudComm::initSecurity() {
+ // try to get the salt and if one does not exist set one
+ if (!getSalt()) {
+ //Set the salt
+ setSalt();
}
- /**
- * Inits the HMAC generator.
- */
- void initCrypt() {
-
- if (password == NULL) {
- return;
- }
+ initCrypt();
+}
- try {
- key = initKey();
- password = NULL; // drop password
- mac = Mac.getInstance("HmacSHA256");
- mac.init(key);
- } catch (Exception e) {
- e.printStackTrace();
- throw new Error("Failed To Initialize Ciphers");
- }
+/**
+ * Inits the HMAC generator.
+ */
+void CloudComm::initCrypt() {
+ if (password == NULL) {
+ return;
}
- /*
- * Builds the URL for the given request.
- */
- URL buildRequest(bool isput, int64_t sequencenumber, int64_t maxentries) throws IOException {
- String reqstring = isput ? "req=putslot" : "req=getslot";
- String urlstr = baseurl + "?" + reqstring + "&seq=" + sequencenumber;
- if (maxentries != 0)
- urlstr += "&max=" + maxentries;
- return new URL(urlstr);
+ try {
+ key = initKey();
+ password = NULL;// drop password
+ mac = Mac_getInstance("HmacSHA256");
+ mac->init(key);
+ } catch (Exception *e) {
+ throw new Error("Failed To Initialize Ciphers");
}
+}
- void setSalt() throws ServerException {
-
- if (salt != NULL) {
- // Salt already sent to server so dont set it again
- return;
- }
-
- try {
- char[] saltTmp = new char[SALT_SIZE];
- random.nextBytes(saltTmp);
-
- for (int i = 0; i < SALT_SIZE; i++) {
- System.out.println((int)saltTmp[i] & 255);
- }
-
-
- URL url = new URL(baseurl + "?req=setsalt");
-
- timer.startTime();
- URLConnection con = url.openConnection();
- HttpURLConnection http = (HttpURLConnection) con;
-
- http.setRequestMethod("POST");
- http.setFixedLengthStreamingMode(saltTmp.length);
- http.setDoOutput(true);
- http.setConnectTimeout(TIMEOUT_MILLIS);
-
-
- http.connect();
-
- OutputStream os = http.getOutputStream();
- os.write(saltTmp);
- os.flush();
-
- int responsecode = http.getResponseCode();
- if (responsecode != HttpURLConnection.HTTP_OK) {
- // TODO: Remove this print
- System.out.println(responsecode);
- throw new Error("Invalid response");
- }
+/*
+ * Builds the URL for the given request.
+ */
+URL *CloudComm::buildRequest(bool isput, int64_t sequencenumber, int64_t maxentries) {
+ IoTString *reqstring = isput ? "req=putslot" : "req=getslot";
+ IoTString *urlstr = baseurl + "?" + reqstring + "&seq=" + sequencenumber;
+ if (maxentries != 0)
+ urlstr += "&max=" + maxentries;
+ return new URL(urlstr);
+}
- timer.endTime();
+void CloudComm::setSalt() {
- salt = saltTmp;
- } catch (Exception e) {
- // e.printStackTrace();
- timer.endTime();
- throw new ServerException("Failed setting salt", ServerException.TypeConnectTimeout);
- }
+ if (salt != NULL) {
+ // Salt already sent to server so dont set it again
+ return;
}
- bool getSalt() throws ServerException {
- URL url = NULL;
- URLConnection con = NULL;
- HttpURLConnection http = NULL;
+ try {
+ Array<char> *saltTmp = new Array<char>(CloudComm_SALT_SIZE);
+ random->nextBytes(saltTmp);
- try {
- url = new URL(baseurl + "?req=getsalt");
- } catch (Exception e) {
- // e.printStackTrace();
- throw new Error("getSlot failed");
+ for (int i = 0; i < CloudComm_SALT_SIZE; i++) {
+ printf("%d\n", (int)saltTmp->get(i) & 255);
}
- try {
- timer.startTime();
- con = url.openConnection();
- http = (HttpURLConnection) con;
- http.setRequestMethod("POST");
- http.setConnectTimeout(TIMEOUT_MILLIS);
- http.setReadTimeout(TIMEOUT_MILLIS);
-
-
- http.connect();
- timer.endTime();
- } catch (SocketTimeoutException e) {
- timer.endTime();
- throw new ServerException("getSalt failed", ServerException.TypeConnectTimeout);
- } catch (Exception e) {
- // e.printStackTrace();
- throw new Error("getSlot failed");
+ URL *url = new URL(baseurl + "?req=setsalt");
+ timer->startTime();
+ URLConnection *con = url->openConnection();
+ HttpURLConnection *http = (HttpURLConnection *) con;
+
+ http->setRequestMethod("POST");
+ http->setFixedLengthStreamingMode(saltTmp->length());
+ http->setDoOutput(true);
+ http->setConnectTimeout(CloudComm_TIMEOUT_MILLIS);
+ http->connect();
+
+ OutputStream *os = http->getOutputStream();
+ os->write(saltTmp);
+ os->flush();
+
+ int responsecode = http->getResponseCode();
+ if (responsecode != HttpURLConnection_HTTP_OK) {
+ // TODO: Remove this print
+ printf("%d\n", responsecode);
+ throw new Error("Invalid response");
}
- try {
-
- timer.startTime();
-
- int responsecode = http.getResponseCode();
- if (responsecode != HttpURLConnection.HTTP_OK) {
- // TODO: Remove this print
- // System.out.println(responsecode);
- throw new Error("Invalid response");
- }
-
- InputStream is = http.getInputStream();
- if (is.available() > 0) {
- DataInputStream dis = new DataInputStream(is);
- int salt_length = dis.readInt();
- char [] tmp = new char[salt_length];
- dis.readFully(tmp);
- salt = tmp;
- timer.endTime();
-
- return true;
- } else {
- timer.endTime();
-
- return false;
- }
- } catch (SocketTimeoutException e) {
- timer.endTime();
-
- throw new ServerException("getSalt failed", ServerException.TypeInputTimeout);
- } catch (Exception e) {
- // e.printStackTrace();
- throw new Error("getSlot failed");
- }
+ timer->endTime();
+ salt = saltTmp;
+ } catch (Exception *e) {
+ timer->endTime();
+ throw new ServerException("Failed setting salt", ServerException_TypeConnectTimeout);
}
+}
- char[] createIV(int64_t machineId, int64_t localSequenceNumber) {
- ByteBuffer buffer = ByteBuffer.allocate(IV_SIZE);
- buffer.putLong(machineId);
- int64_t localSequenceNumberShifted = localSequenceNumber << 16;
- buffer.putLong(localSequenceNumberShifted);
- return buffer.array();
+bool CloudComm::getSalt() {
+ URL *url = NULL;
+ URLConnection *con = NULL;
+ HttpURLConnection *http = NULL;
+ try {
+ url = new URL(baseurl + "?req=getsalt");
+ } catch (Exception *e) {
+ throw new Error("getSlot failed");
+ }
+ try {
+ timer->startTime();
+ con = url->openConnection();
+ http = (HttpURLConnection *) con;
+ http->setRequestMethod("POST");
+ http->setConnectTimeout(CloudComm_TIMEOUT_MILLIS);
+ http->setReadTimeout(CloudComm_TIMEOUT_MILLIS);
+ http->connect();
+ timer->endTime();
+ } catch (SocketTimeoutException *e) {
+ timer->endTime();
+ throw new ServerException("getSalt failed", ServerException_TypeConnectTimeout);
+ } catch (Exception *e) {
+ throw new Error("getSlot failed");
}
- char[] encryptSlotAndPrependIV(char[] rawData, char[] ivBytes) {
- try {
- IvParameterSpec ivSpec = new IvParameterSpec(ivBytes);
- Cipher cipher = Cipher.getInstance("AES/CTR/NoPadding");
- cipher.init(Cipher.ENCRYPT_MODE, key, ivSpec);
-
- char[] encryptedBytes = cipher.doFinal(rawData);
-
- char[] chars = new char[encryptedBytes.length + IV_SIZE];
- System.arraycopy(ivBytes, 0, chars, 0, ivBytes.length);
- System.arraycopy(encryptedBytes, 0, chars, IV_SIZE, encryptedBytes.length);
-
- return chars;
-
- } catch (Exception e) {
- e.printStackTrace();
- throw new Error("Failed To Encrypt");
+ try {
+ timer->startTime();
+ int responsecode = http->getResponseCode();
+ if (responsecode != HttpURLConnection_HTTP_OK) {
+ throw new Error("Invalid response");
+ }
+ InputStream *is = http->getInputStream();
+ if (is->available() > 0) {
+ DataInputStream *dis = new DataInputStream(is);
+ int salt_length = dis->readInt();
+ Array<char> *tmp = new Array<char>(salt_length);
+ dis->readFully(tmp);
+ salt = tmp;
+ timer->endTime();
+ return true;
+ } else {
+ timer->endTime();
+ return false;
}
+ } catch (SocketTimeoutException *e) {
+ timer->endTime();
+ throw new ServerException("getSalt failed", ServerException_TypeInputTimeout);
+ } catch (Exception *e) {
+ throw new Error("getSlot failed");
}
+}
+Array<char> *CloudComm::createIV(int64_t machineId, int64_t localSequenceNumber) {
+ ByteBuffer *buffer = ByteBuffer_allocate(CloudComm_IV_SIZE);
+ buffer->putLong(machineId);
+ int64_t localSequenceNumberShifted = localSequenceNumber << 16;
+ buffer->putLong(localSequenceNumberShifted);
+ return buffer->array();
+}
- char[] stripIVAndDecryptSlot(char[] rawData) {
- try {
- char[] ivBytes = new char[IV_SIZE];
- char[] encryptedBytes = new char[rawData.length - IV_SIZE];
- System.arraycopy(rawData, 0, ivBytes, 0, IV_SIZE);
- System.arraycopy(rawData, IV_SIZE, encryptedBytes, 0 , encryptedBytes.length);
+Array<char> *CloudComm::encryptSlotAndPrependIV(Array<char> *rawData, Array<char> *ivBytes) {
+ try {
+ IvParameterSpec *ivSpec = new IvParameterSpec(ivBytes);
+ Cipher *cipher = Cipher_getInstance("AES/CTR/NoPadding");
+ cipher->init(Cipher_ENCRYPT_MODE, key, ivSpec);
- IvParameterSpec ivSpec = new IvParameterSpec(ivBytes);
+ Array<char> *encryptedBytes = cipher->doFinal(rawData);
- Cipher cipher = Cipher.getInstance("AES/CTR/NoPadding");
- cipher.init(Cipher.DECRYPT_MODE, key, ivSpec);
- return cipher.doFinal(encryptedBytes);
+ Array<char> *chars = new Array<char>(encryptedBytes->length() + CloudComm_IV_SIZE);
+ System_arraycopy(ivBytes, 0, chars, 0, ivBytes->length());
+ System_arraycopy(encryptedBytes, 0, chars, CloudComm_IV_SIZE, encryptedBytes->length());
- } catch (Exception e) {
- e.printStackTrace();
- throw new Error("Failed To Decrypt");
- }
+ return chars;
+ } catch (Exception *e) {
+ throw new Error("Failed To Encrypt");
}
+}
+Array<char> *CloudComm::stripIVAndDecryptSlot(Array<char> *rawData) {
+ try {
+ Array<char> *ivBytes = new Array<char>(CloudComm_IV_SIZE);
+ Array<char> *encryptedBytes = new Array<char>(rawData->length() - CloudComm_IV_SIZE);
+ System_arraycopy(rawData, 0, ivBytes, 0, CloudComm_IV_SIZE);
+ System_arraycopy(rawData, CloudComm_IV_SIZE, encryptedBytes, 0, encryptedBytes->length);
+
+ IvParameterSpec *ivSpec = new IvParameterSpec(ivBytes);
+ Cipher *cipher = Cipher_getInstance("AES/CTR/NoPadding");
+ cipher->init(Cipher_DECRYPT_MODE, key, ivSpec);
+ return cipher->doFinal(encryptedBytes);
+ } catch (Exception *e) {
+ throw new Error("Failed To Decrypt");
+ }
+}
- /*
- * API for putting a slot into the queue. Returns NULL on success.
- * On failure, the server will send slots with newer sequence
- * numbers.
- */
- Slot[] putSlot(Slot slot, int max) throws ServerException {
- URL url = NULL;
- URLConnection con = NULL;
- HttpURLConnection http = NULL;
-
- try {
- if (salt == NULL) {
- if (!getSalt()) {
- throw new ServerException("putSlot failed", ServerException.TypeSalt);
- }
- initCrypt();
+/*
+ * API for putting a slot into the queue. Returns NULL on success.
+ * On failure, the server will send slots with newer sequence
+ * numbers.
+ */
+Array<Slot *> *CloudComm::putSlot(Slot *slot, int max) {
+ try {
+ if (salt == NULL) {
+ if (!getSalt()) {
+ throw new ServerException("putSlot failed", ServerException_TypeSalt);
}
-
- int64_t sequencenumber = slot.getSequenceNumber();
- char[] slotBytes = slot.encode(mac);
- // slotBytes = encryptCipher.doFinal(slotBytes);
-
- // char[] iVBytes = slot.getSlotCryptIV();
-
- // char[] chars = new char[slotBytes.length + IV_SIZE];
- // System.arraycopy(iVBytes, 0, chars, 0, iVBytes.length);
- // System.arraycopy(slotBytes, 0, chars, IV_SIZE, slotBytes.length);
-
-
- char[] chars = encryptSlotAndPrependIV(slotBytes, slot.getSlotCryptIV());
-
- url = buildRequest(true, sequencenumber, max);
-
- timer.startTime();
- con = url.openConnection();
- http = (HttpURLConnection) con;
-
- http.setRequestMethod("POST");
- http.setFixedLengthStreamingMode(chars.length);
- http.setDoOutput(true);
- http.setConnectTimeout(TIMEOUT_MILLIS);
- http.setReadTimeout(TIMEOUT_MILLIS);
- http.connect();
-
- OutputStream os = http.getOutputStream();
- os.write(chars);
- os.flush();
-
- timer.endTime();
-
-
- // System.out.println("Bytes Sent: " + chars.length);
- } catch (ServerException e) {
- timer.endTime();
-
- throw e;
- } catch (SocketTimeoutException e) {
- timer.endTime();
-
- throw new ServerException("putSlot failed", ServerException.TypeConnectTimeout);
- } catch (Exception e) {
- // e.printStackTrace();
- throw new Error("putSlot failed");
+ initCrypt();
}
+ int64_t sequencenumber = slot->getSequenceNumber();
+ Array<char> *slotBytes = slot->encode(mac);
+ Array<char> *chars = encryptSlotAndPrependIV(slotBytes, slot->getSlotCryptIV());
+ URL *url = buildRequest(true, sequencenumber, max);
+ timer->startTime();
+ URLConnection *con = url->openConnection();
+ HttpURLConnection *http = (HttpURLConnection *) con;
+ http->setRequestMethod("POST");
+ http->setFixedLengthStreamingMode(chars->length);
+ http->setDoOutput(true);
+ http->setConnectTimeout(CloudComm_TIMEOUT_MILLIS);
+ http->setReadTimeout(CloudComm_TIMEOUT_MILLIS);
+ http->connect();
+ OutputStream *os = http->getOutputStream();
+ os->write(chars);
+ os->flush();
+ timer->endTime();
+ } catch (ServerException *e) {
+ timer->endTime();
+ throw e;
+ } catch (SocketTimeoutException *e) {
+ timer->endTime();
+ throw new ServerException("putSlot failed", ServerException_TypeConnectTimeout);
+ } catch (Exception *e) {
+ throw new Error("putSlot failed");
+ }
+ try {
+ timer->startTime();
+ InputStream *is = http->getInputStream();
+ DataInputStream *dis = new DataInputStream(is);
+ Array<char> *resptype = new Array<char>(7);
+ dis->readFully(resptype);
+ timer->endTime();
- try {
- timer.startTime();
- InputStream is = http.getInputStream();
- DataInputStream dis = new DataInputStream(is);
- char[] resptype = new char[7];
- dis.readFully(resptype);
- timer.endTime();
-
- if (Arrays.equals(resptype, "getslot".getBytes())) {
- return processSlots(dis);
- } else if (Arrays.equals(resptype, "putslot".getBytes())) {
- return NULL;
- } else
- throw new Error("Bad response to putslot");
-
- } catch (SocketTimeoutException e) {
- timer.endTime();
- throw new ServerException("putSlot failed", ServerException.TypeInputTimeout);
- } catch (Exception e) {
- // e.printStackTrace();
- throw new Error("putSlot failed");
- }
+ if (Arrays->equals(resptype, "getslot"->getBytes())) {
+ return processSlots(dis);
+ } else if (Arrays->equals(resptype, "putslot"->getBytes())) {
+ return NULL;
+ } else
+ throw new Error("Bad response to putslot");
+ } catch (SocketTimeoutException *e) {
+ timer->endTime();
+ throw new ServerException("putSlot failed", ServerException->TypeInputTimeout);
+ } catch (Exception *e) {
+ throw new Error("putSlot failed");
}
+}
- /**
- * Request the server to send all slots with the given
- * sequencenumber or newer.
- */
- Slot[] getSlots(int64_t sequencenumber) throws ServerException {
- URL url = NULL;
- URLConnection con = NULL;
- HttpURLConnection http = NULL;
-
- try {
- if (salt == NULL) {
- if (!getSalt()) {
- throw new ServerException("getSlots failed", ServerException.TypeSalt);
- }
- initCrypt();
+/**
+ * Request the server to send all slots with the given
+ * sequencenumber or newer->
+ */
+Array<Slot *> *CloudComm::getSlots(int64_t sequencenumber) {
+ try {
+ if (salt == NULL) {
+ if (!getSalt()) {
+ throw new ServerException("getSlots failed", ServerException_TypeSalt);
}
-
- url = buildRequest(false, sequencenumber, 0);
- timer.startTime();
- con = url.openConnection();
- http = (HttpURLConnection) con;
- http.setRequestMethod("POST");
- http.setConnectTimeout(TIMEOUT_MILLIS);
- http.setReadTimeout(TIMEOUT_MILLIS);
-
-
-
- http.connect();
- timer.endTime();
-
- } catch (SocketTimeoutException e) {
- timer.endTime();
-
- throw new ServerException("getSlots failed", ServerException.TypeConnectTimeout);
- } catch (ServerException e) {
- timer.endTime();
-
- throw e;
- } catch (Exception e) {
- // e.printStackTrace();
- throw new Error("getSlots failed");
+ initCrypt();
}
- try {
-
- timer.startTime();
- InputStream is = http.getInputStream();
- DataInputStream dis = new DataInputStream(is);
- char[] resptype = new char[7];
-
- dis.readFully(resptype);
- timer.endTime();
-
- if (!Arrays.equals(resptype, "getslot".getBytes()))
- throw new Error("Bad Response: " + new String(resptype));
-
- return processSlots(dis);
- } catch (SocketTimeoutException e) {
- timer.endTime();
-
- throw new ServerException("getSlots failed", ServerException.TypeInputTimeout);
- } catch (Exception e) {
- // e.printStackTrace();
- throw new Error("getSlots failed");
- }
+ URL *url = buildRequest(false, sequencenumber, 0);
+ timer->startTime();
+ URLConnection *con = url->openConnection();
+ HttpURLConnection *http = (HttpURLConnection *) con;
+ http->setRequestMethod("POST");
+ http->setConnectTimeout(CloudComm_TIMEOUT_MILLIS);
+ http->setReadTimeout(CloudComm_TIMEOUT_MILLIS);
+ http->connect();
+ timer->endTime();
+ } catch (SocketTimeoutException *e) {
+ timer->endTime();
+ throw new ServerException("getSlots failed", ServerException_TypeConnectTimeout);
+ } catch (ServerException *e) {
+ timer->endTime();
+
+ throw e;
+ } catch (Exception *e) {
+ throw new Error("getSlots failed");
}
- /**
- * Method that actually handles building Slot objects from the
- * server response. Shared by both putSlot and getSlots.
- */
- Slot[] processSlots(DataInputStream dis) throws Exception {
- int numberofslots = dis.readInt();
- int[] sizesofslots = new int[numberofslots];
-
- Slot[] slots = new Slot[numberofslots];
- for (int i = 0; i < numberofslots; i++)
- sizesofslots[i] = dis.readInt();
-
- for (int i = 0; i < numberofslots; i++) {
-
- char[] rawData = new char[sizesofslots[i]];
- dis.readFully(rawData);
-
+ try {
+ timer->startTime();
+ InputStream *is = http->getInputStream();
+ DataInputStream *dis = new DataInputStream(is);
+ Array<char> *resptype = new Array<char>(7);
+ dis->readFully(resptype);
+ timer->endTime();
+ if (!resptype->equals("getslot"->getBytes()))
+ throw new Error("Bad Response: " + new String(resptype));
+
+ return processSlots(dis);
+ } catch (SocketTimeoutException *e) {
+ timer->endTime();
+ throw new ServerException("getSlots failed", ServerException_TypeInputTimeout);
+ } catch (Exception *e) {
+ throw new Error("getSlots failed");
+ }
+}
- // char[] data = new char[rawData.length - IV_SIZE];
- // System.arraycopy(rawData, IV_SIZE, data, 0, data.length);
+/**
+ * Method that actually handles building Slot objects from the
+ * server response. Shared by both putSlot and getSlots.
+ */
+Array<Slot *> *CloudComm::processSlots(DataInputStream *dis) {
+ int numberofslots = dis->readInt();
+ Array<int> *sizesofslots = new Array<int>(numberofslots);
+ Array<Slot *> *slots = new Array<Slot *>(numberofslots);
+
+ for (int i = 0; i < numberofslots; i++)
+ sizesofslots->set(i, dis->readInt());
+ for (int i = 0; i < numberofslots; i++) {
+ Array<char> *rawData = new Array<char>(sizesofslots->get(i));
+ dis->readFully(rawData);
+ Array<char> *data = stripIVAndDecryptSlot(rawData);
+ slots->set(i, Slot_decode(table, data, mac));
+ }
+ dis->close();
+ return slots;
+}
+Array<char> *sendLocalData(Array<char> *sendData, int64_t localSequenceNumber, String host, int port) {
+ if (salt == NULL)
+ return NULL;
+ try {
+ printf("Passing Locally\n");
+ mac->update(sendData);
+ Array<char> *genmac = mac->doFinal();
+ Array<char> *totalData = new Array<char>(sendData->length() + genmac->length());
+ System_arraycopy(sendData, 0, totalData, 0, sendData->length());
+ System_arraycopy(genmac, 0, totalData, sendData->length(), genmac->length());
+
+ // Encrypt the data for sending
+ Array<char> *iv = createIV(table->getMachineId(), table->getLocalSequenceNumber());
+ Array<char> *encryptedData = encryptSlotAndPrependIV(totalData, iv);
+
+ // Open a TCP socket connection to a local device
+ Socket *socket = new Socket(host, port);
+ socket->setReuseAddress(true);
+ DataOutputStream *output = new DataOutputStream(socket->getOutputStream());
+ DataInputStream *input = new DataInputStream(socket->getInputStream());
+
+ timer->startTime();
+ // Send data to output (length of data, the data)
+ output->writeInt(encryptedData->length);
+ output->write(encryptedData, 0, encryptedData->length);
+ output->flush();
+
+ int lengthOfReturnData = input->readInt();
+ Array<char> *returnData = new Array<char>(lengthOfReturnData);
+ input->readFully(returnData);
+ timer->endTime();
+ returnData = stripIVAndDecryptSlot(returnData);
+
+ // We are done with this socket
+ socket->close();
+ mac->update(returnData, 0, returnData->length - HMAC_SIZE);
+ Array<char> *realmac = mac->doFinal();
+ Array<char> *recmac = new Array<char>(HMAC_SIZE);
+ System_arraycopy(returnData, returnData->length - realmac->length, recmac, 0, realmac->length);
+
+ if (!recmac->equals(realmac))
+ throw new Error("Local Error: Invalid HMAC! Potential Attack!");
+
+ Array<char> *returnData2 = new Array<char>(lengthOfReturnData - recmac->length());
+ System_arraycopy(returnData, 0, returnData2, 0, returnData2->length);
+
+ return returnData2;
+ } catch (Exception *e) {
+ printf("Exception\n");
+ }
- char[] data = stripIVAndDecryptSlot(rawData);
+ return NULL;
+}
- // data = decryptCipher.doFinal(data);
+void CloudComm::localServerWorkerFunction() {
+ ServerSocket *inputSocket = NULL;
- slots[i] = Slot.decode(table, data, mac);
- }
- dis.close();
- return slots;
+ try {
+ // Local server socket
+ inputSocket = new ServerSocket(listeningPort);
+ inputSocket->setReuseAddress(true);
+ inputSocket->setSoTimeout(CloudComm_TIMEOUT_MILLIS);
+ } catch (Exception *e) {
+ throw new Error("Local server setup failure...");
}
- char[] sendLocalData(char[] sendData, int64_t localSequenceNumber, String host, int port) {
-
- if (salt == NULL) {
- return NULL;
- }
+ while (!doEnd) {
try {
- System.out.println("Passing Locally");
-
- mac.update(sendData);
- char[] genmac = mac.doFinal();
- char[] totalData = new char[sendData.length + genmac.length];
- System.arraycopy(sendData, 0, totalData, 0, sendData.length);
- System.arraycopy(genmac, 0, totalData, sendData.length, genmac.length);
+ // Accept incoming socket
+ Socket *socket = inputSocket->accept();
+ DataInputStream *input = new DataInputStream(socket->getInputStream());
+ DataOutputStream *output = new DataOutputStream(socket->getOutputStream());
+
+ // Get the encrypted data from the server
+ int dataSize = input->readInt();
+ Array<char> *readData = new Array<char>(dataSize);
+ input->readFully(readData);
+ timer->endTime();
+
+ // Decrypt the data
+ readData = stripIVAndDecryptSlot(readData);
+ mac->update(readData, 0, readData->length - HMAC_SIZE);
+ Array<char> *genmac = mac->doFinal();
+ Array<char> *recmac = new Array<char>(HMAC_SIZE);
+ System_arraycopy(readData, readData->length() - recmac->length(), recmac, 0, recmac->length());
+
+ if (!recmac->equals(genmac))
+ throw new Error("Local Error: Invalid HMAC! Potential Attack!");
- // Encrypt the data for sending
- // char[] encryptedData = encryptCipher.doFinal(totalData);
- // char[] encryptedData = encryptCipher.doFinal(totalData);
- char[] iv = createIV(table.getMachineId(), table.getLocalSequenceNumber());
- char[] encryptedData = encryptSlotAndPrependIV(totalData, iv);
+ Array<char> *returnData = new Array<char>(readData->length() - recmac->length());
+ System_arraycopy(readData, 0, returnData, 0, returnData->length());
- // Open a TCP socket connection to a local device
- Socket socket = new Socket(host, port);
- socket.setReuseAddress(true);
- DataOutputStream output = new DataOutputStream(socket.getOutputStream());
- DataInputStream input = new DataInputStream(socket.getInputStream());
+ // Process the data
+ Array<char> *sendData = table->acceptDataFromLocal(returnData);
+ mac->update(sendData);
+ Array<char> *realmac = mac->doFinal();
+ Array<char> *totalData = new Array<char>(sendData->length() + realmac->length());
+ System_arraycopy(sendData, 0, totalData, 0, sendData->length());
+ System_arraycopy(realmac, 0, totalData, sendData->length(), realmac->length());
+ // Encrypt the data for sending
+ Array<char> *iv = createIV(table->getMachineId(), table->getLocalSequenceNumber());
+ Array<char> *encryptedData = encryptSlotAndPrependIV(totalData, iv);
- timer.startTime();
+ timer->startTime();
// Send data to output (length of data, the data)
- output.writeInt(encryptedData.length);
- output.write(encryptedData, 0, encryptedData.length);
- output.flush();
-
- int lengthOfReturnData = input.readInt();
- char[] returnData = new char[lengthOfReturnData];
- input.readFully(returnData);
-
- timer.endTime();
-
- // returnData = decryptCipher.doFinal(returnData);
- returnData = stripIVAndDecryptSlot(returnData);
- // returnData = decryptCipher.doFinal(returnData);
-
- // We are done with this socket
- socket.close();
-
- mac.update(returnData, 0, returnData.length - HMAC_SIZE);
- char[] realmac = mac.doFinal();
- char[] recmac = new char[HMAC_SIZE];
- System.arraycopy(returnData, returnData.length - realmac.length, recmac, 0, realmac.length);
-
- if (!Arrays.equals(recmac, realmac))
- throw new Error("Local Error: Invalid HMAC! Potential Attack!");
-
- char[] returnData2 = new char[lengthOfReturnData - recmac.length];
- System.arraycopy(returnData, 0, returnData2, 0, returnData2.length);
-
- return returnData2;
- } catch (Exception e) {
- e.printStackTrace();
- // throw new Error("Local comms failure...");
+ output->writeInt(encryptedData->length());
+ output->write(encryptedData, 0, encryptedData->length());
+ output->flush();
+ // close the socket
+ socket->close();
+ } catch (Exception *e) {
}
-
- return NULL;
}
- void localServerWorkerFunction() {
-
- ServerSocket inputSocket = NULL;
-
+ if (inputSocket != NULL) {
try {
- // Local server socket
- inputSocket = new ServerSocket(listeningPort);
- inputSocket.setReuseAddress(true);
- inputSocket.setSoTimeout(TIMEOUT_MILLIS);
- } catch (Exception e) {
- e.printStackTrace();
- throw new Error("Local server setup failure...");
- }
-
- while (!doEnd) {
-
- try {
- // Accept incoming socket
- Socket socket = inputSocket.accept();
-
- DataInputStream input = new DataInputStream(socket.getInputStream());
- DataOutputStream output = new DataOutputStream(socket.getOutputStream());
-
- // Get the encrypted data from the server
- int dataSize = input.readInt();
- char[] readData = new char[dataSize];
- input.readFully(readData);
-
- timer.endTime();
-
- // Decrypt the data
- // readData = decryptCipher.doFinal(readData);
- readData = stripIVAndDecryptSlot(readData);
-
- mac.update(readData, 0, readData.length - HMAC_SIZE);
- char[] genmac = mac.doFinal();
- char[] recmac = new char[HMAC_SIZE];
- System.arraycopy(readData, readData.length - recmac.length, recmac, 0, recmac.length);
-
- if (!Arrays.equals(recmac, genmac))
- throw new Error("Local Error: Invalid HMAC! Potential Attack!");
-
- char[] returnData = new char[readData.length - recmac.length];
- System.arraycopy(readData, 0, returnData, 0, returnData.length);
-
- // Process the data
- // char[] sendData = table.acceptDataFromLocal(readData);
- char[] sendData = table.acceptDataFromLocal(returnData);
-
-
- mac.update(sendData);
- char[] realmac = mac.doFinal();
- char[] totalData = new char[sendData.length + realmac.length];
- System.arraycopy(sendData, 0, totalData, 0, sendData.length);
- System.arraycopy(realmac, 0, totalData, sendData.length, realmac.length);
-
- // Encrypt the data for sending
- // char[] encryptedData = encryptCipher.doFinal(totalData);
- char[] iv = createIV(table.getMachineId(), table.getLocalSequenceNumber());
- char[] encryptedData = encryptSlotAndPrependIV(totalData, iv);
-
-
- timer.startTime();
- // Send data to output (length of data, the data)
- output.writeInt(encryptedData.length);
- output.write(encryptedData, 0, encryptedData.length);
- output.flush();
-
- // close the socket
- socket.close();
- } catch (Exception e) {
-
- }
- }
-
- if (inputSocket != NULL) {
- try {
- inputSocket.close();
- } catch (Exception e) {
- e.printStackTrace();
- throw new Error("Local server close failure...");
- }
+ inputSocket->close();
+ } catch (Exception *e) {
+ throw new Error("Local server close failure...");
}
}
+}
- void close() {
- doEnd = true;
-
- if (localServerThread != NULL) {
- try {
- localServerThread.join();
- } catch (Exception e) {
- e.printStackTrace();
- throw new Error("Local Server thread join issue...");
- }
- }
-
- // System.out.println("Done Closing Cloud Comm");
- }
+void CloudComm::close() {
+ doEnd = true;
- protected void finalize() throws Throwable {
+ if (localServerThread != NULL) {
try {
- close(); // close open files
- } finally {
- super.finalize();
+ localServerThread->join();
+ } catch (Exception *e) {
+ throw new Error("Local Server thread join issue...");
}
}
}
projects / iotcloud.git / blobdiff