430 lines
16 KiB
Python
430 lines
16 KiB
Python
#!/usr/bin/env python
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#
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# Electrum - lightweight Bitcoin client
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# Copyright (C) 2013 ecdsa@github
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#
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# Permission is hereby granted, free of charge, to any person
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# obtaining a copy of this software and associated documentation files
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# (the "Software"), to deal in the Software without restriction,
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# including without limitation the rights to use, copy, modify, merge,
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# publish, distribute, sublicense, and/or sell copies of the Software,
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# and to permit persons to whom the Software is furnished to do so,
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# subject to the following conditions:
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#
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# The above copyright notice and this permission notice shall be
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# included in all copies or substantial portions of the Software.
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#
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# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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# BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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# ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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# CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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# SOFTWARE.
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from typing import TYPE_CHECKING
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from PyQt6.QtCore import Qt, pyqtSignal
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from PyQt6.QtGui import QPixmap
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from PyQt6.QtWidgets import (QVBoxLayout, QCheckBox, QHBoxLayout, QLineEdit,
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QLabel, QCompleter, QDialog, QStyledItemDelegate,
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QWidget, QPushButton)
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from electrum.i18n import _
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from electrum.mnemonic import Mnemonic, calc_seed_type, is_any_2fa_seed_type
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from electrum import old_mnemonic
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from electrum import slip39
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from electrum.util import ChoiceItem
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from .util import (
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Buttons, OkButton, WWLabel, ButtonsTextEdit, icon_path, EnterButton,
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CloseButton, WindowModalDialog, ColorScheme, font_height, ChoiceWidget,
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)
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from .qrtextedit import ShowQRTextEdit, ScanQRTextEdit
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from .completion_text_edit import CompletionTextEdit
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if TYPE_CHECKING:
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from electrum.simple_config import SimpleConfig
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MSG_PASSPHRASE_WARN_ISSUE4566 = _("Warning") + ": "\
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+ _("You have multiple consecutive whitespaces or leading/trailing "
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"whitespaces in your passphrase.") + " " \
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+ _("This is discouraged.") + " " \
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+ _("Due to a bug, old versions of Electrum will NOT be creating the "
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"same wallet as newer versions or other software.")
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def seed_warning_msg(seed):
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return ''.join([
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"<p>",
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_("Please save these {0} words on paper (order is important). "),
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_("This seed will allow you to recover your wallet in case "
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"of computer failure."),
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"</p>",
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"<b>" + _("WARNING") + ":</b>",
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"<ul>",
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"<li>" + _("Never disclose your seed.") + "</li>",
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"<li>" + _("Never type it on a website.") + "</li>",
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"<li>" + _("Do not store it electronically.") + "</li>",
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"</ul>"
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]).format(len(seed.split()))
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class SeedWidget(QWidget):
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updated = pyqtSignal()
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validChanged = pyqtSignal([bool], arguments=['valid'])
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def __init__(
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self,
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seed=None,
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title=None,
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icon=True,
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msg=None,
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options=None,
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is_seed=None, # only used for electrum seeds
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passphrase=None,
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parent=None,
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for_seed_words=True,
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*,
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config: 'SimpleConfig',
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):
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QWidget.__init__(self, parent)
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vbox = QVBoxLayout()
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self.setLayout(vbox)
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self.options = options
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self.config = config
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self.msg = msg
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if options:
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self.seed_types = [
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ChoiceItem(key=stype, label=label) for stype, label in (
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('electrum', _('Electrum')),
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('bip39', _('BIP39 seed')),
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('slip39', _('SLIP39 seed')),
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)
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if stype in self.options
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]
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assert len(self.seed_types)
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self.seed_type = self.seed_types[0].key
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else:
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self.seed_type = 'electrum'
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self.is_seed = is_seed
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if title:
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vbox.addWidget(WWLabel(title))
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if seed: # "read only", we already have the text
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if for_seed_words:
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self.seed_e = ButtonsTextEdit()
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else: # e.g. xpub
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self.seed_e = ShowQRTextEdit(config=self.config)
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self.seed_e.addCopyButton()
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self.seed_e.setReadOnly(True)
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self.seed_e.setText(seed)
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else: # we expect user to enter text
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assert for_seed_words
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self.seed_e = CompletionTextEdit()
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self.seed_e.setTabChangesFocus(False) # so that tab auto-completes
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self.seed_e.textChanged.connect(self.on_edit)
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self.initialize_completer()
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self.seed_e.setMaximumHeight(max(75, 5 * font_height()))
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hbox = QHBoxLayout()
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if icon:
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logo = QLabel()
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logo.setPixmap(QPixmap(icon_path("seed.png"))
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.scaledToWidth(64, mode=Qt.TransformationMode.SmoothTransformation))
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logo.setMaximumWidth(60)
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hbox.addWidget(logo)
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hbox.addWidget(self.seed_e)
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vbox.addLayout(hbox)
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hbox = QHBoxLayout()
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hbox.addStretch(1)
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self.seed_type_label = QLabel('')
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hbox.addWidget(self.seed_type_label)
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# options
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self.is_ext = False
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if options:
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opt_button = EnterButton(_('Options'), self.seed_options)
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hbox.addWidget(opt_button)
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vbox.addLayout(hbox)
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if passphrase:
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hbox = QHBoxLayout()
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passphrase_e = QLineEdit()
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passphrase_e.setText(passphrase)
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passphrase_e.setReadOnly(True)
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hbox.addWidget(QLabel(_("Your seed extension is") + ':'))
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hbox.addWidget(passphrase_e)
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vbox.addLayout(hbox)
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# slip39 shares
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self.slip39_mnemonic_index = 0
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self.slip39_mnemonics = [""]
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self.slip39_seed = None
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self.slip39_current_mnemonic_invalid = None
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hbox = QHBoxLayout()
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hbox.addStretch(1)
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self.prev_share_btn = QPushButton(_("Previous share"))
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self.prev_share_btn.clicked.connect(self.on_prev_share)
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hbox.addWidget(self.prev_share_btn)
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self.next_share_btn = QPushButton(_("Next share"))
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self.next_share_btn.clicked.connect(self.on_next_share)
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hbox.addWidget(self.next_share_btn)
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self.update_share_buttons()
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vbox.addLayout(hbox)
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vbox.addStretch(1)
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self.seed_status = WWLabel('')
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vbox.addWidget(self.seed_status)
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self.seed_warning = WWLabel('')
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if msg:
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self.seed_warning.setText(seed_warning_msg(seed))
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else:
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self.update_seed_warning()
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vbox.addWidget(self.seed_warning)
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def seed_options(self):
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dialog = QDialog()
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dialog.setWindowTitle(_("Seed Options"))
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vbox = QVBoxLayout(dialog)
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if 'ext' in self.options:
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cb_ext = QCheckBox(_('Extend this seed with custom words'))
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cb_ext.setChecked(self.is_ext)
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vbox.addWidget(cb_ext)
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def on_selected(idx):
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self.seed_type = seed_type_choice.selected_key
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self.slip39_current_mnemonic_invalid = None
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self.seed_status.setText('')
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self.update_seed_warning()
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self.on_edit()
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self.update_share_buttons()
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self.initialize_completer()
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if len(self.seed_types) > 1:
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seed_type_choice = ChoiceWidget(message=_('Seed type'), choices=self.seed_types, default_key=self.seed_type)
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seed_type_choice.itemSelected.connect(on_selected)
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vbox.addWidget(seed_type_choice)
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vbox.addLayout(Buttons(OkButton(dialog)))
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if not dialog.exec():
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return None
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if 'ext' in self.options:
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self.is_ext = cb_ext.isChecked()
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if len(self.seed_types) > 1:
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self.seed_type = seed_type_choice.selected_key
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self.update_seed_warning()
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self.updated.emit()
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def update_seed_warning(self):
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if self.msg:
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return
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if self.seed_type == 'bip39':
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message = ' '.join([
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'<b>' + _('Warning') + ':</b> ',
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_('BIP39 seeds can be imported in Electrum, so that users can access funds locked in other wallets.'),
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_('However, we do not generate BIP39 seeds, because they do not meet our safety standard.'),
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_('BIP39 seeds do not include a version number, which compromises compatibility with future software.'),
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_('We do not guarantee that BIP39 imports will always be supported in Electrum.'),
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])
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elif self.seed_type == 'slip39':
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message = ' '.join([
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'<b>' + _('Warning') + ':</b> ',
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_('SLIP39 seeds can be imported in Electrum, so that users can access funds locked in other wallets.'),
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_('However, we do not generate SLIP39 seeds.'),
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])
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else:
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message = ''
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self.seed_warning.setText(message)
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def initialize_completer(self):
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if self.seed_type != 'slip39':
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bip39_english_list = Mnemonic('en').wordlist
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old_list = old_mnemonic.wordlist
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only_old_list = set(old_list) - set(bip39_english_list)
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self.wordlist = list(bip39_english_list) + list(only_old_list) # concat both lists
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self.wordlist.sort()
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class CompleterDelegate(QStyledItemDelegate):
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def initStyleOption(self, option, index):
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super().initStyleOption(option, index)
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# Some people complained that due to merging the two word lists,
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# it is difficult to restore from a metal backup, as they planned
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# to rely on the "4 letter prefixes are unique in bip39 word list" property.
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# So we color words that are only in old list.
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if option.text in only_old_list:
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# yellow bg looks ~ok on both light/dark theme, regardless if (un)selected
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option.backgroundBrush = ColorScheme.YELLOW.as_color(background=True)
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delegate = CompleterDelegate(self.seed_e)
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else:
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self.wordlist = list(slip39.get_wordlist())
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delegate = None
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self.completer = QCompleter(self.wordlist)
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if delegate:
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self.completer.popup().setItemDelegate(delegate)
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self.seed_e.set_completer(self.completer)
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def get_seed_words(self):
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return self.seed_e.text().split()
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def get_seed(self):
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if self.seed_type != 'slip39':
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return ' '.join(self.get_seed_words())
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else:
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return self.slip39_seed
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def on_edit(self):
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s = ' '.join(self.get_seed_words())
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if self.seed_type == 'bip39':
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from electrum.keystore import bip39_is_checksum_valid
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is_checksum, is_wordlist = bip39_is_checksum_valid(s)
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label = ''
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valid = bool(s)
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if valid:
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label = ('' if is_checksum else _('BIP39 checksum failed')) if is_wordlist else _('Unknown BIP39 wordlist')
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elif self.seed_type == 'slip39':
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self.slip39_mnemonics[self.slip39_mnemonic_index] = s
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try:
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slip39.decode_mnemonic(s)
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except slip39.Slip39Error as e:
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share_status = str(e)
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current_mnemonic_invalid = True
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else:
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share_status = _('Valid.')
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current_mnemonic_invalid = False
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label = _('SLIP39 share') + ' #%d: %s' % (self.slip39_mnemonic_index + 1, share_status)
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# No need to process mnemonics if the current mnemonic remains invalid after editing.
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if not (self.slip39_current_mnemonic_invalid and current_mnemonic_invalid):
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self.slip39_seed, seed_status = slip39.process_mnemonics(self.slip39_mnemonics)
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self.seed_status.setText(seed_status)
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self.slip39_current_mnemonic_invalid = current_mnemonic_invalid
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valid = self.slip39_seed is not None
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self.update_share_buttons()
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else:
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valid = self.is_seed(s)
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t = calc_seed_type(s)
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label = _('Seed Type') + ': ' + t if t else ''
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if t and not valid: # electrum seed, but does not conform to dialog rules
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wiztype_fullname = _('Wallet with two-factor authentication') if is_any_2fa_seed_type(t) else _("Standard wallet")
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msg = ' '.join([
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'<b>' + _('Warning') + ':</b> ',
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_("Looks like you have entered a valid seed of type '{}' but this dialog does not support such seeds.").format(t),
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_("If unsure, try restoring as '{}'.").format(wiztype_fullname),
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])
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self.seed_warning.setText(msg)
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else:
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self.seed_warning.setText("")
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self.seed_type_label.setText(label)
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self.validChanged.emit(valid)
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# disable suggestions if user already typed an unknown word
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for word in self.get_seed_words()[:-1]:
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if word not in self.wordlist:
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self.seed_e.disable_suggestions()
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return
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self.seed_e.enable_suggestions()
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def update_share_buttons(self):
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if self.seed_type != 'slip39':
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self.prev_share_btn.hide()
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self.next_share_btn.hide()
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return
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finished = self.slip39_seed is not None
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self.prev_share_btn.show()
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self.next_share_btn.show()
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self.prev_share_btn.setEnabled(self.slip39_mnemonic_index != 0)
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self.next_share_btn.setEnabled(
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# already pressed "prev" and undoing that:
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self.slip39_mnemonic_index < len(self.slip39_mnemonics) - 1
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# finished entering latest share and starting new one:
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or (bool(self.seed_e.text().strip()) and not self.slip39_current_mnemonic_invalid and not finished)
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)
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def on_prev_share(self):
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if not self.slip39_mnemonics[self.slip39_mnemonic_index]:
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del self.slip39_mnemonics[self.slip39_mnemonic_index]
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self.slip39_mnemonic_index -= 1
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self.seed_e.setText(self.slip39_mnemonics[self.slip39_mnemonic_index])
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self.slip39_current_mnemonic_invalid = None
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def on_next_share(self):
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if not self.slip39_mnemonics[self.slip39_mnemonic_index]:
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del self.slip39_mnemonics[self.slip39_mnemonic_index]
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else:
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self.slip39_mnemonic_index += 1
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if len(self.slip39_mnemonics) <= self.slip39_mnemonic_index:
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self.slip39_mnemonics.append("")
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self.seed_e.setFocus()
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self.seed_e.setText(self.slip39_mnemonics[self.slip39_mnemonic_index])
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self.slip39_current_mnemonic_invalid = None
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class KeysWidget(QWidget):
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validChanged = pyqtSignal([bool], arguments=['valid'])
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def __init__(
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self,
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parent=None,
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header_layout=None,
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is_valid=None,
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allow_multi=False,
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*,
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config: 'SimpleConfig',
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):
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QWidget.__init__(self, parent)
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vbox = QVBoxLayout()
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self.setLayout(vbox)
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self.is_valid = is_valid
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self.text_e = ScanQRTextEdit(allow_multi=allow_multi, config=config)
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self.text_e.textChanged.connect(self.on_edit)
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if isinstance(header_layout, str):
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vbox.addWidget(WWLabel(header_layout))
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else:
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vbox.addLayout(header_layout)
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vbox.addWidget(self.text_e)
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def get_text(self):
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return self.text_e.text()
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def on_edit(self):
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try:
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valid = self.is_valid(self.get_text())
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except Exception as e:
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valid = False
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self.validChanged.emit(valid)
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class SeedDialog(WindowModalDialog):
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def __init__(self, parent, seed, passphrase, *, config: 'SimpleConfig'):
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WindowModalDialog.__init__(self, parent, ('Electrum - ' + _('Seed')))
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self.setMinimumWidth(400)
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vbox = QVBoxLayout(self)
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title = _("Your wallet generation seed is:")
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seed_widget = SeedWidget(title=title, seed=seed, msg=True, passphrase=passphrase, config=config)
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vbox.addWidget(seed_widget)
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vbox.addLayout(Buttons(CloseButton(self)))
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