Password login Recipe

docs/cookbook.md

@@ -844,7 +844,7 @@ While there is no official support for "Tables" (e.g. there is no Table Element)
 
     sg.FlexForm('Table').LayoutAndRead(layout)
 
-## Tight Layout
+## Tight Layout with Button States
 
 Saw this example layout written in tkinter and liked it so much I duplicated the interface.  It's "tight", clean, and has a nice dark look and feel.
 
@@ -906,3 +906,73 @@ In other GUI frameworks this program would be most likely "event driven" with ca
             SubmitButton.Update(button_color=('gray34', 'springgreen4'))
             ResetButton.Update(button_color=('gray34', 'firebrick3'))
             recording = False
+
+## Password Protection For Scripts
+
+You get 2 scripts in one.
+
+Use the upper half to generate your hash code.  Then paste it into the code in the lower half.  Copy and paste lower 1/2 into your code to get password protection for your script without putting the password into your source code.
+
+![password entry](https://user-images.githubusercontent.com/13696193/45129440-ab58f000-b151-11e8-8ebe-e519a50b3ead.jpg)
+
+![password hash](https://user-images.githubusercontent.com/13696193/45129441-ab58f000-b151-11e8-8a46-c2789bb7824e.jpg)
+
+    import PySimpleGUI as sg
+    import hashlib
+
+    '''
+         Create a secure login for your scripts without having to include your password    in the program.  Create an SHA1 hash code for your password using the GUI. Paste into variable in final program
+         1. Choose a password
+         2. Generate a hash code for your chosen password by running program and entering 'gui' as the password
+         3. Type password into the GUI
+         4. Copy and paste hash code form GUI into variable named login_password_hash
+         5. Run program again and test your login!
+    '''
+
+    # Use this GUI to get your password's hash code
+    def HashGeneratorGUI():
+        layout = [[sg.T('Password Hash Generator', size=(30,1), font='Any 15')],
+                  [sg.T('Password'), sg.In(key='password')],
+                  [sg.T('SHA Hash'), sg.In('', size=(40,1), key='hash')],
+                  ]
+
+        form = sg.FlexForm('SHA Generator', auto_size_text=False, default_element_size=(10,1),
+                           text_justification='r', return_keyboard_events=True)
+        form.Layout(layout)
+
+        while True:
+            button, values = form.Read()
+            if button is None:
+                  exit(69)
+
+            password = values['password']
+            try:
+                password_utf = password.encode('utf-8')
+                sha1hash = hashlib.sha1()
+                sha1hash.update(password_utf)
+                password_hash = sha1hash.hexdigest()
+                form.FindElement('hash').Update(password_hash)
+            except:
+                pass
+
+    # ----------------------------- Paste this code into your program / script -----------------------------
+    # determine if a password matches the secret password by comparing SHA1 hash codes
+    def PasswordMatches(password, hash):
+        password_utf = password.encode('utf-8')
+        sha1hash = hashlib.sha1()
+        sha1hash.update(password_utf)
+        password_hash = sha1hash.hexdigest()
+        if password_hash == hash:
+            return True
+     else:
+            return False
+
+    login_password_hash = '5baa61e4c9b93f3f0682250b6cf8331b7ee68fd8'
+    password = sg.PopupGetText('Password', password_char='*')
+    if password == 'gui':                # Remove when pasting into your program
+      HashGeneratorGUI()               # Remove when pasting into your program
+      exit(69)                         # Remove when pasting into your program
+    if PasswordMatches(password, login_password_hash):
+        print('Login SUCCESSFUL')
+    else:
+        print('Login FAILED!!')