finalizando trab 2

trabalho2/localtoken.py

@@ -1,7 +1,29 @@
 from hashlib import sha256
 import time
 
-# password = hashed password
-def generate_token(password, salt):
-    time = time.strftime('%d%m%Y%H%M')
-    token = sha256((password + salt + time).encode('utf-8')).hexdigest()
+# token = hashed password + hashed salt
+def generate_token(token):
+    time = get_timestamp()
+    token = sha256((token + time).encode('utf-8')).hexdigest()
+
+    return token
+
+# password = hashed seed password
+# salt = hashed salt
+def get_salted_password(password, salt):
+    return sha256((password + salt).encode('utf-8')).hexdigest()
+
+def validate_token(salted_password, token, n=5):
+    time = get_timestamp()
+    tokens = []
+    for i in range(n):
+        last = tokens[-1] if len(tokens) > 0 else salted_password
+        tokens.append(generate_token(last))
+
+        if token[:8] == tokens[-1][:8]:
+            return True, i
+
+    return False, -1
+
+def get_timestamp():
+    return time.strftime('%d%m%Y%H%M')