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N-of-N (XOR) seed splitting: user-level support

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This patch introduces the commands `mmgen-seedsplit` and `mmgen-seedjoin`.
The first creates shares one at a time, while the second joins them to
recover the original seed.  By default, the default wallet is operated upon.

Shares are ordinary MMGen wallets and as such may be saved in any MMGen wallet
format, with one minor limitation: only one share in a given split may be in
hidden incognito format, and it must be the master share in the case of a
master share split.

For usage information and examples, see:

    mmgen-seedsplit --help
    mmgen-seedjoin --help

Relevant tests:

    test/test.py -e seedsplit
    ls -lrt test/tmp23/* # list the created files

    test/objtest.py SeedSplitSpecifier

Related commits:

    7311f474 - seed splitting: seed-level infrastructure
    237567bc - master shares
This commit is contained in:
The MMGen Project 2019-10-13 17:33:21 +00:00
commit c7ca0c3d62
Signed by: mmgen
GPG key ID: 3F8B1861E32B7DA2
14 changed files with 665 additions and 8 deletions
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cmds/mmgen-seedjoin Executable file
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#!/usr/bin/env python3
# mmgen = Multi-Mode GENerator, command-line Bitcoin cold storage solution
# Copyright (C)2013-2019 The MMGen Project <mmgen@tuta.io>
#
# This program is free software: you can redistribute it and/or modify it under
# the terms of the GNU General Public License as published by the Free Software
# Foundation, either version 3 of the License, or (at your option) any later
# version.
#
# This program is distributed in the hope that it will be useful, but WITHOUT
# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
# FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
# details.
#
# You should have received a copy of the GNU General Public License along with
# this program. If not, see <http://www.gnu.org/licenses/>.
"""
mmgen-seedjoin: Recreate an MMGen deterministic wallet from its component shares
"""
from mmgen.main import launch
launch("seedjoin")

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cmds/mmgen-seedsplit Executable file
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#!/usr/bin/env python3
# mmgen = Multi-Mode GENerator, command-line Bitcoin cold storage solution
# Copyright (C)2013-2019 The MMGen Project <mmgen@tuta.io>
#
# This program is free software: you can redistribute it and/or modify it under
# the terms of the GNU General Public License as published by the Free Software
# Foundation, either version 3 of the License, or (at your option) any later
# version.
#
# This program is distributed in the hope that it will be useful, but WITHOUT
# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
# FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
# details.
#
# You should have received a copy of the GNU General Public License along with
# this program. If not, see <http://www.gnu.org/licenses/>.
"""
mmgen-seedsplit: Generate a seed split from an MMGen deterministic wallet
"""
from mmgen.main import launch
launch("seedsplit")