work on new block metadata format and some small bug fixes

onionr/communicator.py

@@ -19,7 +19,7 @@ and code to operate as a daemon, getting commands from the command queue databas
     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 sqlite3, requests, hmac, hashlib, time, sys, os, math, logger, urllib.parse, random, base64, binascii
+import sqlite3, requests, hmac, hashlib, time, sys, os, math, logger, urllib.parse, base64, binascii, secrets
 import core, onionrutils, onionrcrypto, netcontroller, onionrproofs, btc, config, onionrplugins as plugins
 
 class OnionrCommunicate:
@@ -149,7 +149,7 @@ class OnionrCommunicate:
             peersCheck = len(peerList)
 
         while peersCheck > peersChecked:
-            i = random.randint(0, maxN)
+            i = secrets.randbelow(maxN)
             logger.info('Using ' + peerList[i] + ' to find new peers', timestamp=True)
             try:
                 newAdders = self.performGet('pex', peerList[i], skipHighFailureAddress=True)
@@ -260,7 +260,7 @@ class OnionrCommunicate:
         blocks = ''
         for i in peerList:
             hasher = hashlib.sha3_256()
-            data = self.performGet('getData', i, hash)
+            data = self.performGet('getData', i, hash, skipHighFailureAddress=True)
             if data == False or len(data) > 10000000 or data == '':
                 continue
             try:

onionr/core.py

@@ -221,12 +221,14 @@ class Core:
         '''
             Create a database for blocks
 
-            hash - the hash of a block
+            hash         - the hash of a block
             dateReceived - the date the block was recieved, not necessarily when it was created
-            decrypted - if we can successfully decrypt the block (does not describe its current state)
-            dataType - data type of the block
-            dataFound - if the data has been found for the block
-            dataSaved - if the data has been saved for the block
+            decrypted    - if we can successfully decrypt the block (does not describe its current state)
+            dataType     - data type of the block
+            dataFound    - if the data has been found for the block
+            dataSaved    - if the data has been saved for the block
+            signature    - optional signature by the author (not optional if author is specified)
+            author       - multi-round partial scrypt hash of authors public key
         '''
         if os.path.exists(self.blockDB):
             raise Exception("Block database already exists")
@@ -238,7 +240,10 @@ class Core:
             decrypted int,
             dataType text,
             dataFound int,
-            dataSaved int);
+            dataSaved int,
+            signature text,
+            author text,
+            );
         ''')
         conn.commit()
         conn.close()
@@ -584,15 +589,19 @@ class Core:
 
         return
 
-    def insertBlock(self, data, header='txt'):
+    def insertBlock(self, data, header='txt', sign=False):
         '''
             Inserts a block into the network
         '''
         retData = ''
+        metadata = header
+        if sign:
+            metadata += '-' + self._crypto.pubKeyHashID() + '-'
+            metadata += self._crypto.edSign(data, encodeResult=True) + '-'
         if len(data) == 0:
             logger.error('Will not insert empty block')
         else:
-            addedHash = self.setData('-' + header + '-' + data)
+            addedHash = self.setData(metadata + data)
             self.addToBlockDB(addedHash, selfInsert=True)
             self.setBlockType(addedHash, header)
             retData = addedHash

onionr/onionr.py

@@ -576,7 +576,7 @@ class Onionr:
             except FileNotFoundError:
                 logger.warn('That file does not exist. Improper path?')
             else:
-                print(new)
+                logger.debug(new)
                 self.onionrCore.insertBlock(new, header='bin')
 
 

onionr/onionrcrypto.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 nacl.signing, nacl.encoding, nacl.public, nacl.secret, os, binascii, base64
+import nacl.signing, nacl.encoding, nacl.public, nacl.secret, os, binascii, base64, hashlib
 
 class OnionrCrypto:
     def __init__(self, coreInstance):
@@ -25,6 +25,8 @@ class OnionrCrypto:
         self._keyFile = 'data/keys.txt'
         self.pubKey = None
         self.privKey = None
+        
+        self.HASH_ID_ROUNDS = 2000
 
         # Load our own pub/priv Ed25519 keys, gen & save them if they don't exist
         if os.path.exists(self._keyFile):
@@ -170,4 +172,15 @@ class OnionrCrypto:
         '''Generate a Ed25519 public key pair, return tuple of base32encoded pubkey, privkey'''
         private_key = nacl.signing.SigningKey.generate()
         public_key = private_key.verify_key.encode(encoder=nacl.encoding.Base32Encoder())
-        return (public_key.decode(), private_key.encode(encoder=nacl.encoding.Base32Encoder()).decode())
+        return (public_key.decode(), private_key.encode(encoder=nacl.encoding.Base32Encoder()).decode())
+    
+    def pubKeyHashID(self, pubkey=self.pubKey):
+        '''Accept a ed25519 public key, return a truncated result of X many sha3_256 hash rounds'''
+        prev = ''
+        pubkey = pubkey.encode()
+        for i in range(self.HASH_ID_ROUNDS):
+            hasher = hashlib.sha3_256()
+            hasher.update(pubkey + prev.encode())
+            prev = hasher.hexdigest()
+        result = prev
+        return result