add linux auth module

auth.py

@@ -0,0 +1,12 @@
+import crypt
+
+def authenticate(u, p):
+    f = [i.split(":") for i in open("/etc/shadow").read().split("\n")]
+    d = dict(zip([i[0] for i in f], [i[1:] for i in f]))
+    if u not in d:
+        return False
+    return d[u][0] == crypt.crypt(p, d[u][0])
+
+def get_real_users():
+    f = [i.split(":") for i in open("/etc/shadow").read().split("\n")]
+    return [i[0] for i in filter(lambda a: len(a) > 1, f) if not(i[1] in ["*", "!"])]