work on forward secrecy

.gitignore

@@ -13,3 +13,4 @@ onionr/data-encrypted.dat
 onionr/.onionr-lock
 core
 .vscode/*
+venv/*

onionr/core.py

@@ -472,18 +472,17 @@ class Core:
             id text             0
             name text,          1
             adders text,        2
-            forwardKey text,    3
-            dateSeen not null,  4
-            bytesStored int,    5
-            trust int           6
-            pubkeyExchanged int 7
-            hashID text         8
-            pow text            9
+            dateSeen not null,  3
+            bytesStored int,    4
+            trust int           5
+            pubkeyExchanged int 6
+            hashID text         7
+            pow text            8
         '''
         conn = sqlite3.connect(self.peerDB)
         c = conn.cursor()
         command = (peer,)
-        infoNumbers = {'id': 0, 'name': 1, 'adders': 2, 'forwardKey': 3, 'dateSeen': 4, 'bytesStored': 5, 'trust': 6, 'pubkeyExchanged': 7, 'hashID': 8}
+        infoNumbers = {'id': 0, 'name': 1, 'adders': 2, 'dateSeen': 3, 'bytesStored': 4, 'trust': 5, 'pubkeyExchanged': 6, 'hashID': 7}
         info = infoNumbers[info]
         iterCount = 0
         retVal = ''

onionr/dbcreator.py

@@ -61,7 +61,6 @@ class DBCreator:
             ID text not null,
             name text,
             adders text,
-            forwardKey text,
             dateSeen not null,
             bytesStored int,
             trust int,
@@ -69,6 +68,10 @@ class DBCreator:
             hashID text,
             pow text not null);
         ''')
+        c.execute('''CREATE TABLE forwardKeys(
+        peerKey text not null,
+        forwardKey text not null,
+        date int not null);''')
         conn.commit()
         conn.close()
         return

onionr/onionrusers.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 onionrblockapi, logger, onionrexceptions, json
+import onionrblockapi, logger, onionrexceptions, json, sqlite3
 class OnionrUser:
     def __init__(self, coreInst, publicKey):
         self.trust = 0
@@ -60,6 +60,20 @@ class OnionrUser:
     def forwardDecrypt(self, encrypted):
         return
     
+    def addForwardKey(self, newKey):
+        # Add a forward secrecy key for the peer
+        conn = sqlite3.connect(self._core.peerDB)
+        c = conn.cursor()
+        # Prepare the insert
+        time = self._core._utils.getEpoch()
+        command = (self.publicKey, newKey, time)
+
+        c.execute("INSERT INTO forwardKeys VALUES(?, ?, ?);", command)
+
+        conn.commit()
+        conn.close()
+        return
+    
     def findAndSetID(self):
         '''Find any info about the user from existing blocks and cache it to their DB entry'''
         infoBlocks = []

onionr/static-data/default-plugins/metadataprocessor/main.py

@@ -22,28 +22,50 @@
 import logger, config
 import os, sys, json, time, random, shutil, base64, getpass, datetime, re
 from onionrblockapi import Block
+import onionrusers
 
 plugin_name = 'metadataprocessor'
 
 # event listeners
 
+def _processUserInfo(api, newBlock):
+    '''
+        Set the username for a particular user, from a signed block by them
+    '''
+    myBlock = newBlock
+    peerName = myBlock.getMetadata('name')
+    try:
+        if len(peerName) > 20:
+            raise onionrexceptions.InvalidMetdata('Peer name specified is too large')
+    except TypeError:
+        pass
+    except onionrexceptions.InvalidMetadata:
+        pass
+    else:
+        api.get_core().setPeerInfo(signer, 'name', peerName)
+        logger.info('%s is now using the name %s.' % (signer, api.get_utils().escapeAnsi(peerName)))
+
+def _processForwardKey(api, myBlock):
+    '''
+        Get the forward secrecy key specified by the user for us to use
+    '''
+    peer = onionrusers.OnionrUser(self.api.get_core(), myBlock.signer)
+
 def on_processBlocks(api):
     myBlock = api.data['block']
     blockType = api.data['type']
     print('blockType is ' + blockType)
+
+    # Process specific block types
+
+    # userInfo blocks, such as for setting username
     if blockType == 'userInfo':
         if myBlock.verifySig():
-            peerName = myBlock.getMetadata('name')
-            try:
-                if len(peerName) > 20:
-                    raise onionrexceptions.InvalidMetdata('Peer name specified is too large')
-            except TypeError:
-                pass
-            except onionrexceptions.InvalidMetadata:
-                pass
-            else:
-                api.get_core().setPeerInfo(signer, 'name', peerName)
-                logger.info('%s is now using the name %s.' % (signer, api.get_utils().escapeAnsi(peerName)))
+            _processUserInfo(api, myBlock)
+    # forwardKey blocks
+    elif blockType == 'forwardKey':
+        if myBlock.verifySig():
+            _processForwardKey(api, myBlock)
 
 def on_init(api, data = None):