added hash and salt

.gitignore

@@ -0,0 +1 @@
+pwdb.pkl

auth.py

@@ -1,24 +1,32 @@
 import pickle
+from getpass import getpass
+import random
+import string
+
+charset = string.ascii_letters + string.digits + string.punctuation  
 
 def get_credentials():
     username = input("Enter username:")
-    password = input("Enter password:")
+    password = getpass("Enter password:")
     return (username, password)
 
 def authenticate(username, password, pwdb):
-    status = False
+    status = 0
     if username in pwdb:
-        if password == pwdb[username]:
-            status = True
+        salt = pwdb[username]["salt"]
+        if pwhash(salt+password) == pwdb[username]["password"]:
+            status = 1
         else:
-            print('Wrong password!')
+            pass
     else:
         add_user(username, password, pwdb)
+        status = 2
 
     return status
 
 def add_user(username, password, pwdb):
-    pwdb[username] = password
+    salt = get_salt()
+    pwdb[username] = {"password": pwhash(salt+password), "salt": salt}
     write_pwdb(pwdb)
 
 def read_pwdb():
@@ -34,12 +42,23 @@ def write_pwdb(pwdb):
     with open("pwdb.pkl", "wb") as fh:
         pickle.dump(pwdb, fh)
 
+def pwhash(pwd):
+    sum = 0
+    for c in pwd:
+        sum += ord(c)
+    return sum
+
+def get_salt():
+    return "".join(random.sample(charset,5))
+
 
 if __name__ == "__main__":
     username, password = get_credentials()
     pwdb = read_pwdb()
     status = authenticate(username, password, pwdb)
-    if status:
+    if status == 1:
         print('Authentication succeeded:', pwdb)
+    elif status == 2:
+        print("New user created")
     else:
         print('Authentication failed')