Create secure_account_manager.py

secure_account_manager.py

@@ -0,0 +1,57 @@
+import hashlib
+
+def hasher(text):
+    converted=text.encode('utf-8')    
+    return hashlib.sha256(converted).hexdigest()
+
+def blacklist_write(usrnm,passwd):
+    string=f"{usrnm}-{passwd}"
+    with open("blacklisted.secure","a") as f1:
+        f1.write(string+"\n")
+
+def blacklist_read():
+    try:
+        with open("blacklisted.secure","r") as f1:
+            return [i.strip() for i  in f1.readlines()]
+    except FileNotFoundError:
+        return []
+
+def whitelist_write(usrnm,passwd):
+    string=f"{usrnm}-{passwd}"
+    with open("whitelisted.secure","a") as f2:
+        f2.write(string+"\n")
+
+def whitelist_read():
+    try:
+        with open("whitelisted.secure","r") as f2:
+            return [i.strip() for i in f2.readlines()]
+    except FileNotFoundError:
+        return []
+
+while True:
+    print('Account Creation\n[1] Register\n[2] Login')
+    opt=input("Option: ")
+    if (opt=="1"):
+        usrnm=hasher(input("Enter Username: ").lower())
+        passwd=hasher(input("Enter Password: "))
+        check=(f"{usrnm}-{passwd}") in whitelist_read()
+        if (not check):
+            whitelist_write(usrnm,passwd)
+        else:
+            print("User Already Exists!")
+        break
+    elif (opt=="2"):
+        usrnm=hasher(input("Enter Username: ").lower())
+        passwd=hasher(input("Enter Password: "))
+        is_blacklisted=(f"{usrnm}-{passwd}") in blacklist_read()
+        is_whitelisted=(f"{usrnm}-{passwd}") in whitelist_read()
+        if (is_whitelisted and not is_blacklisted):
+            print("Login Successful!")
+            break
+        elif (is_blacklisted and not is_whitelisted):
+            print("Blacklisted Account! Access Denied!")
+            break
+        else:
+            print("Invalid Credentials!")
+    else:
+        print("Invalid Option!")