sshmitm.tools.askpass module

SSH-MITM Askpass

This is a Python implementation of the SSH-ASKPASS utility which provides a simple Tkinter-based GUI dialog to obtain a password from the user.

This utility is often used in conjunction with the OpenSSH ssh-agent program to securely store private keys. The ssh-agent program is able to hold private keys in memory, and automatically provides the passphrases required to use these keys. When a key is added to the ssh-agent, it is encrypted and stored in memory, and ssh-askpass is used to prompt the user for the passphrase required to unlock the key.

This module provides a GUI dialog to obtain a password from the user, as well as a function to confirm a question with a yes/no answer. The module requires Tkinter to be installed to function. If Tkinter is not installed, a error message will be logged and the program will exit with exit code 1.

The main() function is the entry point for the application, and takes an argument list of messages, which are used as the primary and secondary messages to be displayed in the dialog. If the first message ends with a question mark, the confirm() function is used, otherwise the ask_pass() function is used. If the user cancels or closes the dialog, the program will exit with exit code 1.

sshmitm.tools.askpass.ask_pass(primary_message, secondary_message=None)

This function displays a dialog box for the user to enter a password.

The dialog box has a primary message, and an optional secondary message.

Parameters:

• primary_message (str) – The primary message to be displayed in the dialog box

• secondary_message (Optional[str], default: None) – An optional secondary message to be displayed in the dialog box

Return type:

Optional[str]

Returns:

The password entered by the user

sshmitm.tools.askpass.confirm(primary_message, secondary_message=None)

Confirms a question with yes or no answer.

Parameters:

• primary_message (str) – The main message to be displayed

• secondary_message (Optional[str], default: None) – An optional secondary message to be displayed

Return type:

bool

Returns:

True if answer is yes, False otherwise.

sshmitm.tools.askpass.main()

Main function to run the SSH-ASKPASS implementation.

Return type:

NoReturn