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67 lines
2.0 KiB
Python
67 lines
2.0 KiB
Python
"""UIs for PIN/passphrase entry."""
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import logging
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import os
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import subprocess
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from . import pinentry
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log = logging.getLogger(__name__)
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def _create_default_options_getter():
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options = []
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try:
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ttyname = subprocess.check_output(args=['tty']).strip()
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options.append(b'ttyname=' + ttyname)
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except subprocess.CalledProcessError as e:
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log.warning('no TTY found: %s', e)
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display = os.environ.get('DISPLAY')
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if display is not None:
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options.append('display={}'.format(display).encode('ascii'))
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else:
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log.warning('DISPLAY not defined')
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log.info('using %s for pinentry options', options)
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return lambda: options
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class UI(object):
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"""UI for PIN/passphrase entry (for TREZOR devices)."""
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def __init__(self):
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"""C-tor."""
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self.options_getter = _create_default_options_getter()
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self.pin_entry_binary = 'pinentry'
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self.passphrase_entry_binary = 'pinentry'
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@classmethod
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def from_config_dict(cls, d):
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"""Simple c-tor from configuration dictionary."""
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obj = cls()
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obj.pin_entry_binary = d.get('pin_entry_binary',
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obj.pin_entry_binary)
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obj.passphrase_entry_binary = d.get('passphrase_entry_binary',
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obj.passphrase_entry_binary)
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return obj
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def get_pin(self):
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"""Ask the user for (scrambled) PIN."""
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return pinentry.interact(
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'Use the numeric keypad to describe number positions.\n'
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'The layout is:\n'
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' 7 8 9\n'
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' 4 5 6\n'
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' 1 2 3\n'
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'Please enter PIN:',
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binary=self.pin_entry_binary,
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options=self.options_getter())
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def get_passphrase(self):
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"""Ask the user for passphrase."""
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return pinentry.interact(
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'Please enter passphrase:',
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binary=self.passphrase_entry_binary,
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options=self.options_getter())
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