0894985bfa
General operations: hexdump - encode binary data in formatted hexadecimal form unhexdump - decode formatted hexadecimal data Bitcoin operations: strtob58 - convert a string to base 58 hextob58 - convert a hexadecimal number to base 58 b58tohex - convert a base 58 number to hexadecimal b58randenc - generate a random 32-byte number and convert it to base 58 randwif - generate a random private key in WIF format randpair - generate a random private key/address pair wif2addr - generate a Bitcoin address from a key in WIF format Mnemonic operations (choose "electrum" (default), "tirosh" or "all" wordlists): mn_rand128 - generate random 128-bit mnemonic mn_rand192 - generate random 192-bit mnemonic mn_rand256 - generate random 256-bit mnemonic mn_stats - show stats for mnemonic wordlist mn_printlist - print mnemonic wordlist
128 lines
4.2 KiB
Python
Executable file
128 lines
4.2 KiB
Python
Executable file
#!/usr/bin/env python
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#
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# mmgen = Multi-Mode GENerator, command-line Bitcoin cold storage solution
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# Copyright (C) 2013-2014 by philemon <mmgen-py@yandex.com>
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#
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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"""
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mmgen-passchg: Change a mmgen deterministic wallet's passphrase, label or
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hash preset
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"""
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import sys
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from mmgen.Opts import *
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from mmgen.util import *
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import mmgen.config as g
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help_data = {
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'desc': """Change the passphrase, hash preset or label of a {}
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deterministic wallet""".format(g.proj_name),
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'usage': "[opts] [filename]",
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'options': """
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-h, --help Print this help message
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-d, --outdir d Specify an alternate directory 'd' for output
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-H, --show-hash-presets Show information on available hash presets
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-k, --keep-old-passphrase Keep old passphrase (use when changing hash
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strength or label only)
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-L, --label l Change the wallet's label to 'l'
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-p, --hash-preset p Change scrypt.hash() parameters to preset 'p'
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(default: '{}')
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-P, --passwd-file f Get new passphrase from file 'f'
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-q, --quiet Suppress warnings; overwrite files without
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prompting
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-v, --verbose Produce more verbose output
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NOTE: The key ID will change if either the passphrase or hash preset
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are changed
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""".format(g.hash_preset)
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}
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short_opts = "hd:HkL:p:P:qv"
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long_opts = "help","outdir=","show_hash_presets","keep_old_passphrase",\
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"label=","hash_preset=","passwd_file=","quiet","verbose"
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opts,cmd_args = process_opts(sys.argv,help_data,short_opts,long_opts)
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if 'quiet' in opts: g.quiet = True
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if 'verbose' in opts: g.verbose = True
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check_opts(opts,long_opts)
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if 'show_hash_presets' in opts: show_hash_presets()
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if len(cmd_args) != 1:
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msg("One input file must be specified")
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sys.exit(2)
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infile = cmd_args[0]
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# Old key:
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label,metadata,hash_preset,salt,enc_seed = get_data_from_wallet(infile)
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seed_id,key_id = metadata[:2]
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# Repeat on incorrect pw entry
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prompt = "Enter %spassphrase: " % (""
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if 'keep_old_passphrase' in opts else "old ")
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while True:
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passwd = get_mmgen_passphrase(prompt,{})
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key = make_key(passwd, salt, hash_preset)
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seed = decrypt_seed(enc_seed, key, seed_id, key_id)
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if seed: break
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changed = {}
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if 'label' in opts:
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if opts['label'] != label:
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msg("Label changed: '%s' -> '%s'" % (label, opts['label']))
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changed['label'] = True
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else:
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msg("Label is unchanged: '%s'" % (label))
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else: opts['label'] = label # Copy the old label
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if 'hash_preset' in opts:
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if hash_preset != opts['hash_preset']:
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qmsg("Hash preset has changed (%s -> %s)" %
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(hash_preset, opts['hash_preset']))
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changed['preset'] = True
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else:
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msg("Hash preset is unchanged")
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else:
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opts['hash_preset'] = hash_preset
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if 'keep_old_passphrase' in opts:
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msg("Keeping old passphrase by user request")
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else:
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new_passwd = get_new_passphrase("new passphrase", opts)
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if new_passwd == passwd:
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qmsg("Passphrase is unchanged")
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else:
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qmsg("Passphrase has changed")
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passwd = new_passwd
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changed['passwd'] = True
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if 'preset' in changed or 'passwd' in changed: # Update key ID, salt
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qmsg("Will update salt and key ID")
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from hashlib import sha256
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from Crypto import Random
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salt = sha256(salt + Random.new().read(128)).digest()[:g.salt_len]
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key = make_key(passwd, salt, opts['hash_preset'])
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new_key_id = make_chksum_8(key)
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qmsg("Key ID changed: %s -> %s" % (key_id,new_key_id))
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key_id = new_key_id
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enc_seed = encrypt_seed(seed, key)
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elif not 'label' in changed:
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msg("Data unchanged. No file will be written")
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sys.exit(2)
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write_wallet_to_file(seed, passwd, key_id, salt, enc_seed, opts)
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