new ttl range checking

CHANGELOG.md

@@ -2,6 +2,11 @@
 
 This project uses Semantic Versioning
 
+## 7.0.0
+
+- Have minimum and maximum TTL allowance to avoid overflow/nonsense
+
+
 ## 6.0.0
 
 - Use TTL instead of rounds

onionrblocks/generators/anonvdf.py

@@ -16,6 +16,12 @@ class NotEnoughRounds(Exception):
 class NoTTLSet(Exception):
     pass
 
+class RoundsOutOfBounds(Exception):
+    pass
+
+MAX_ROUNDS = 999_999_999
+MINIMUM_ROUNDS = 10_000
+
 
 class AnonVDFGenerator(generator.KastenBaseGenerator):
 
@@ -50,6 +56,10 @@ class AnonVDFGenerator(generator.KastenBaseGenerator):
             raise NoTTLSet(e)
 
         rounds = AnonVDFGenerator.get_rounds_for_ttl_seconds(ttl, len(packed_bytes))
+
+        if rounds > MAX_ROUNDS or rounds < MINIMUM_ROUNDS:
+            raise RoundsOutOfBounds()
+
         check_block_sanity(packed_bytes)
         vdf = vdf_create(
                 packed_bytes,
@@ -74,6 +84,8 @@ class AnonVDFGenerator(generator.KastenBaseGenerator):
 
         ttl = int(ttl)
         rounds = AnonVDFGenerator.get_rounds_for_ttl_seconds(ttl, len(packed_bytes))
+        if rounds > MAX_ROUNDS or rounds < MINIMUM_ROUNDS:
+            raise RoundsOutOfBounds()
 
 
         #hash = hash.lstrip(b"0")

setup.py

@@ -1,7 +1,7 @@
 from setuptools import setup, find_packages
 
 setup(name='onionrblocks',
-      version='6.0.0',
+      version='7.0.0',
       description='Onionr message format',
       author='Kevin Froman',
       author_email='beardog@mailbox.org',