formalised project structure

bcrypt/debug/hasheq.py

@@ -0,0 +1,39 @@
+'''
+This file implements debug methods to check whether
+hashrev.bcrypt() operates identically to hash.bcrypt().
+TLDR: test if I made a dumb typo.
+'''
+
+from random import randint, randbytes
+import bcrypt.hash
+import bcrypt.hashrev
+
+def is_bcrypt_eq(x: bytes, R_table: Optional[dict[int, int]] = None) -> bool:
+    return hashrev.bcrypt(x, R_table=R_table) == hash.bcrypt(x)
+
+'''
+Display internals of testing bcrypt implementations
+from bcrypt/hash.py and bcrypt/hashrev.py
+NOTE: By default this runs 10000 trials for
+NOTE: random sequences of length 0-16 bytes.
+'''
+def disint_bcrypt_eq(trials: int = 10000, 
+                     max_bytes: int = 16) -> bytes | None:
+    R_table = hashrev.calc_R_array(max = 255)
+    for i in range(trials):
+        # generate random bytes
+        num_bytes = randint(0, max_bytes)
+        x = randbytes(num_bytes)
+        
+        # test the modified bcrypt with the original    
+        hash_rev = hashrev.bcrypt(x, R_table=R_table)
+        hash_expected = hash.bcrypt(x)
+        if hash_rev != hash_expected:
+            print(f'Your hashfn sucks, big mistake bucko!! (failed iter: {i})')
+            print(f'     Got: {hash_rev}')
+            print(f'Expected: {hash_bcrypt}')
+            print(f'Input Bytes: {[str(b) for b in x]}')
+            return x
+
+    print('Impeccable hashfn holy moly!!')
+    return None