fixed forward secrecy and delete keys

onionr/communicator2.py

@@ -99,11 +99,13 @@ class OnionrCommunicatorDaemon:
         netCheckTimer = OnionrCommunicatorTimers(self, self.daemonTools.netCheck, 600)
         announceTimer = OnionrCommunicatorTimers(self, self.daemonTools.announceNode, 305, requiresPeer=True, maxThreads=1)
         cleanupTimer = OnionrCommunicatorTimers(self, self.peerCleanup, 300, requiresPeer=True)
+        forwardSecrecyTimer = OnionrCommunicatorTimers(self, self.daemonTools.cleanKeys, 15)
 
         # set loop to execute instantly to load up peer pool (replaced old pool init wait)
         peerPoolTimer.count = (peerPoolTimer.frequency - 1)
         cleanupTimer.count = (cleanupTimer.frequency - 60)
         announceTimer.count = (cleanupTimer.frequency - 60)
+        #forwardSecrecyTimer.count = (forwardSecrecyTimer.frequency - 990)
 
         self.socketServer = threading.Thread(target=onionrsockets.OnionrSocketServer, args=(self._core,))
         self.socketServer.start()
@@ -450,7 +452,10 @@ class OnionrCommunicatorDaemon:
             if cmd[0] == 'shutdown':
                 self.shutdown = True
             elif cmd[0] == 'announceNode':
+                if len(self.onlinePeers) > 0:
                     self.announce(cmd[1])
+                else:
+                    logger.warn("Not introducing, since I have no connected nodes.")
             elif cmd[0] == 'runCheck':
                 logger.debug('Status check; looks good.')
                 open(self._core.dataDir + '.runcheck', 'w+').close()

onionr/core.py

@@ -670,7 +670,7 @@ class Core:
         except AttributeError:
             pass
 
-        if encryptType == 'sym':
+        if encryptType == 'asym':
             try:
                 forwardEncrypted = onionrusers.OnionrUser(self, asymPeer).forwardEncrypt(data)
                 data = forwardEncrypted[0]

onionr/onionrdaemontools.py

@@ -17,7 +17,7 @@
     You should have received a copy of the GNU General Public License
     along with this program.  If not, see <https://www.gnu.org/licenses/>.
 '''
-import onionrexceptions, onionrpeers, onionrproofs, base64, logger
+import onionrexceptions, onionrpeers, onionrproofs, base64, logger, onionrusers, sqlite3
 from dependencies import secrets
 class DaemonTools:
     def __init__(self, daemon):
@@ -79,6 +79,26 @@ class DaemonTools:
             self.daemon._core.removeBlock(bHash)
         self.daemon.decrementThreadCount('cleanOldBlocks')
     
+    def cleanKeys(self):
+        '''Delete expired forward secrecy keys'''
+        conn = sqlite3.connect(self.daemon._core.peerDB, timeout=10)
+        c = conn.cursor()
+        time = self.daemon._core._utils.getEpoch()
+        deleteKeys = []
+        for entry in c.execute("SELECT * FROM forwardKeys where expire <= ?", (time,)):
+            logger.info(entry[1])
+            deleteKeys.append(entry[1])
+        
+        for key in deleteKeys:
+            logger.info('Deleting forward key '+ key)
+            c.execute("DELETE from forwardKeys where forwardKey = ?", (key,))
+        conn.commit()
+        conn.close()
+
+        onionrusers.deleteExpiredKeys(self.daemon._core)
+
+        self.daemon.decrementThreadCount('cleanKeys')
+
     def cooldownPeer(self):
         '''Randomly add an online peer to cooldown, so we can connect a new one'''
         onlinePeerAmount = len(self.daemon.onlinePeers)

onionr/onionrusers.py

@@ -19,6 +19,19 @@
 '''
 import onionrblockapi, logger, onionrexceptions, json, sqlite3
 import nacl.exceptions
+
+def deleteExpiredKeys(coreInst):
+    # Fetch the keys we generated for the peer, that are still around
+    conn = sqlite3.connect(coreInst.forwardKeysFile, timeout=10)
+    c = conn.cursor()
+
+    curTime = coreInst._utils.getEpoch()
+    c.execute("DELETE from myForwardKeys where expire <= ?", (curTime,))
+    conn.commit()
+    conn.execute("VACUUM")
+    conn.close()
+    return
+
 class OnionrUser:
     def __init__(self, coreInst, publicKey):
         self.trust = 0
@@ -58,7 +71,7 @@ class OnionrUser:
     def forwardEncrypt(self, data):
         retData = ''
         forwardKey = self._getLatestForwardKey()
-        logger.info('using ' + forwardKey)
+        #logger.info('using ' + forwardKey)
         if self._core._utils.validatePubKey(forwardKey):
             retData = self._core._crypto.pubKeyEncrypt(data, forwardKey, encodedData=True, anonymous=True)
         else:
@@ -68,9 +81,9 @@ class OnionrUser:
     
     def forwardDecrypt(self, encrypted):
         retData = ""
-        logger.error(self.publicKey)
-        logger.error(self.getGeneratedForwardKeys())
-        for key in self.getGeneratedForwardKeys():
+        #logger.error(self.publicKey)
+        #logger.error(self.getGeneratedForwardKeys(False))
+        for key in self.getGeneratedForwardKeys(False):
             logger.info(encrypted)
             try:
                 retData = self._core._crypto.pubKeyDecrypt(encrypted, privkey=key[1], anonymous=True, encodedData=True)
@@ -109,7 +122,7 @@ class OnionrUser:
 
         return list(keyList)
 
-    def generateForwardKey(self, expire=432000):
+    def generateForwardKey(self, expire=604800):
 
         # Generate a forward secrecy key for the peer
         conn = sqlite3.connect(self._core.forwardKeysFile, timeout=10)
@@ -121,7 +134,7 @@ class OnionrUser:
         newPriv = self._core._utils.bytesToStr(newKeys[1])
 
         time = self._core._utils.getEpoch()
-        command = (self.publicKey, newPub, newPriv, time, expire)
+        command = (self.publicKey, newPub, newPriv, time, expire + time)
 
         c.execute("INSERT INTO myForwardKeys VALUES(?, ?, ?, ?, ?);", command)
 
@@ -129,7 +142,7 @@ class OnionrUser:
         conn.close()
         return newPub
 
-    def getGeneratedForwardKeys(self):
+    def getGeneratedForwardKeys(self, genNew=True):
         # Fetch the keys we generated for the peer, that are still around
         conn = sqlite3.connect(self._core.forwardKeysFile, timeout=10)
         c = conn.cursor()
@@ -140,11 +153,12 @@ class OnionrUser:
         for result in c.execute("SELECT * FROM myForwardKeys where peer=?", command):
             keyList.append((result[1], result[2]))
         if len(keyList) == 0:
+            if genNew:
                 self.generateForwardKey()
                 keyList = self.getGeneratedForwardKeys()
         return list(keyList)
 
-    def addForwardKey(self, newKey, expire=432000):
+    def addForwardKey(self, newKey, expire=604800):
         if not self._core._utils.validatePubKey(newKey):
             raise onionrexceptions.InvalidPubkey
         # Add a forward secrecy key for the peer
@@ -152,7 +166,7 @@ class OnionrUser:
         c = conn.cursor()
         # Prepare the insert
         time = self._core._utils.getEpoch()
-        command = (self.publicKey, newKey, time, expire)
+        command = (self.publicKey, newKey, time, time + expire)
 
         c.execute("INSERT INTO forwardKeys VALUES(?, ?, ?, ?);", command)
 

onionr/onionrutils.py

@@ -263,14 +263,19 @@ class OnionrUtils:
         '''
         myBlock = Block(blockHash, self._core)
         if myBlock.isEncrypted:
+            #pass
             logger.warn(myBlock.decrypt())
         if (myBlock.isEncrypted and myBlock.decrypted) or (not myBlock.isEncrypted):
             blockType = myBlock.getMetadata('type') # we would use myBlock.getType() here, but it is bugged with encrypted blocks
             signer = self.bytesToStr(myBlock.signer)
             valid = myBlock.verifySig()
 
+            logger.info('Checking for fs key')
             if myBlock.getMetadata('newFSKey') is not None:
                 onionrusers.OnionrUser(self._core, signer).addForwardKey(myBlock.getMetadata('newFSKey'))
+            else:
+                logger.warn('FS not used for this encrypted block')
+                logger.info(myBlock.bmetadata)
         
             try:
                 if len(blockType) <= 10: