minimal_auth.py

@@ -6,30 +6,10 @@ import random
 import string
 
 
-def get_credentials():
-    username = input('Enter your username: ')
-    password = str(hashlib.sha256(getpass.getpass('Enter your password: ').encode()).hexdigest())
-    return (username, password)
-
-def authenticate(username, password, pwdb):
-    return password == pwdb[username]
-
-def add_user(username, pwdb):
-    password = getpass.getpass(f'Enter password for {username}: ')
-    pwdb[username] = str(hashlib.sha256(password.encode()).hexdigest())
-    return pwdb
-
-def read_pwdb(pwdb_path):
-    try:
-        pwdb_file = open(pwdb_path, 'rt')
-        pwdb = json.load(pwdb_file)
-    except Exception:
-        pwdb = {}
-    return pwdb
-
-def write_pwdb(pwdb, pwdb_path):
-    pwdb_file = open(pwdb_path, 'wt')
-    json.dump(pwdb, pwdb_file)
+def get_hash(password,salt):
+    
+    hash_ = str(hashlib.sha256((password+salt).encode('utf-8')).hexdigest())
+    return hash_
 
 def get_salt(char_num=10):
     """Create random string of characters
@@ -44,6 +24,42 @@ def get_salt(char_num=10):
 
     return salt
 
+def create_hash(password):
+
+    salt = get_salt(10)
+
+    hash_ = str(hashlib.sha256((password+salt).encode('utf-8')).hexdigest())
+    return hash_, salt
+
+def get_credentials():
+    username = input('Enter your username: ')
+    password = getpass.getpass('Enter your password: ')
+
+    return (username, password)
+
+def authenticate(username, password, pwdb):
+    salt = pwdb[username][1]
+    given_hash = get_hash(password, salt)
+    return given_hash == pwdb[username][0]
+
+def add_user(username, pwdb):
+    password = getpass.getpass(f'Enter password for {username}: ')
+    hash_, salt = create_hash(password)
+    pwdb[username] = (hash_, salt)
+    return pwdb
+
+def read_pwdb(pwdb_path):
+    try:
+        pwdb_file = open(pwdb_path, 'rt')
+        pwdb = json.load(pwdb_file)
+    except Exception:
+        pwdb = {}
+    return pwdb
+
+def write_pwdb(pwdb, pwdb_path):
+    pwdb_file = open(pwdb_path, 'wt')
+    json.dump(pwdb, pwdb_file)
+
 pwdb_path = 'pwdb.json'
 pwdb = read_pwdb(pwdb_path)