lib/account.py

   1 #!/usr/bin/env python
   2 #
   3 # Electrum - lightweight Bitcoin client
   4 # Copyright (C) 2013 thomasv@gitorious
   5 #
   6 # This program is free software: you can redistribute it and/or modify
   7 # it under the terms of the GNU General Public License as published by
   8 # the Free Software Foundation, either version 3 of the License, or
   9 # (at your option) any later version.
  10 #
  11 # This program is distributed in the hope that it will be useful,
  12 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  14 # GNU General Public License for more details.
  15 #
  16 # You should have received a copy of the GNU General Public License
  17 # along with this program. If not, see <http://www.gnu.org/licenses/>.
  18
  19
  20 from bitcoin import *
  21 from i18n import _
  22 from transaction import Transaction
  23
  24 class Account(object):
  25     def __init__(self, v):
  26         self.addresses = v.get('0', [])
  27         self.change = v.get('1', [])
  28
  29     def dump(self):
  30         return {'0':self.addresses, '1':self.change}
  31
  32     def get_addresses(self, for_change):
  33         return self.change[:] if for_change else self.addresses[:]
  34
  35     def create_new_address(self, for_change):
  36         addresses = self.change if for_change else self.addresses
  37         n = len(addresses)
  38         address = self.get_address( for_change, n)
  39         addresses.append(address)
  40         print address
  41         return address
  42
  43     def get_address(self, for_change, n):
  44         pass
  45
  46     def get_pubkeys(self, sequence):
  47         return [ self.get_pubkey( *sequence )]
  48
  49
  50
  51 class OldAccount(Account):
  52     """  Privatekey(type,n) = Master_private_key + H(n|S|type)  """
  53
  54     def __init__(self, v):
  55         self.addresses = v.get(0, [])
  56         self.change = v.get(1, [])
  57         self.mpk = v['mpk'].decode('hex')
  58
  59     def dump(self):
  60         return {0:self.addresses, 1:self.change}
  61
  62     @classmethod
  63     def mpk_from_seed(klass, seed):
  64         curve = SECP256k1
  65         secexp = klass.stretch_key(seed)
  66         master_private_key = ecdsa.SigningKey.from_secret_exponent( secexp, curve = SECP256k1 )
  67         master_public_key = master_private_key.get_verifying_key().to_string().encode('hex')
  68         return master_public_key
  69
  70     @classmethod
  71     def stretch_key(self,seed):
  72         oldseed = seed
  73         for i in range(100000):
  74             seed = hashlib.sha256(seed + oldseed).digest()
  75         return string_to_number( seed )
  76
  77     def get_sequence(self, for_change, n):
  78         return string_to_number( Hash( "%d:%d:"%(n,for_change) + self.mpk ) )
  79
  80     def get_address(self, for_change, n):
  81         pubkey = self.get_pubkey(for_change, n)
  82         address = public_key_to_bc_address( pubkey.decode('hex') )
  83         return address
  84
  85     def get_pubkey(self, for_change, n):
  86         curve = SECP256k1
  87         mpk = self.mpk
  88         z = self.get_sequence(for_change, n)
  89         master_public_key = ecdsa.VerifyingKey.from_string( mpk, curve = SECP256k1 )
  90         pubkey_point = master_public_key.pubkey.point + z*curve.generator
  91         public_key2 = ecdsa.VerifyingKey.from_public_point( pubkey_point, curve = SECP256k1 )
  92         return '04' + public_key2.to_string().encode('hex')
  93
  94     def get_private_key_from_stretched_exponent(self, for_change, n, secexp):
  95         order = generator_secp256k1.order()
  96         secexp = ( secexp + self.get_sequence(for_change, n) ) % order
  97         pk = number_to_string( secexp, generator_secp256k1.order() )
  98         compressed = False
  99         return SecretToASecret( pk, compressed )
 100
 101     def get_private_key(self, seed, sequence):
 102         for_change, n = sequence
 103         secexp = self.stretch_key(seed)
 104         return self.get_private_key_from_stretched_exponent(for_change, n, secexp)
 105
 106     def check_seed(self, seed):
 107         curve = SECP256k1
 108         secexp = self.stretch_key(seed)
 109         master_private_key = ecdsa.SigningKey.from_secret_exponent( secexp, curve = SECP256k1 )
 110         master_public_key = master_private_key.get_verifying_key().to_string()
 111         if master_public_key != self.mpk:
 112             print_error('invalid password (mpk)', self.mpk.encode('hex'), master_public_key.encode('hex'))
 113             raise Exception('Invalid password')
 114         return True
 115
 116     def redeem_script(self, sequence):
 117         return None
 118
 119     def get_master_pubkeys(self):
 120         return [self.mpk]
 121
 122     def get_type(self):
 123         return _('Old Electrum format')
 124
 125
 126
 127 class BIP32_Account(Account):
 128
 129     def __init__(self, v):
 130         Account.__init__(self, v)
 131         self.xpub = v['xpub']
 132
 133     def dump(self):
 134         d = Account.dump(self)
 135         d['xpub'] = self.xpub
 136         return d
 137
 138     def get_address(self, for_change, n):
 139         pubkey = self.get_pubkey(for_change, n)
 140         address = public_key_to_bc_address( pubkey.decode('hex') )
 141         return address
 142
 143     def first_address(self):
 144         return self.get_address(0,0)
 145
 146     def get_pubkey(self, for_change, n):
 147         _, _, _, c, cK = deserialize_xkey(self.xpub)
 148         for i in [for_change, n]:
 149             cK, c = CKD_pub(cK, c, i)
 150         return cK.encode('hex')
 151
 152     def redeem_script(self, sequence):
 153         return None
 154
 155     def get_pubkeys(self, sequence):
 156         return [self.get_pubkey(*sequence)]
 157
 158     def get_master_pubkeys(self):
 159         return [self.xpub]
 160
 161     def get_type(self):
 162         return _('Standard 1 of 1')
 163         #acctype = 'multisig 2 of 2' if len(roots) == 2 else 'multisig 2 of 3' if len(roots) == 3 else 'standard 1 of 1'
 164
 165
 166 class BIP32_Account_2of2(BIP32_Account):
 167
 168     def __init__(self, v):
 169         BIP32_Account.__init__(self, v)
 170         self.xpub2 = v['xpub2']
 171
 172     def dump(self):
 173         d = BIP32_Account.dump(self)
 174         d['xpub2'] = self.xpub2
 175         return d
 176
 177     def get_pubkey2(self, for_change, n):
 178         _, _, _, c, cK = deserialize_xkey(self.xpub2)
 179         for i in [for_change, n]:
 180             cK, c = CKD_pub(cK, c, i)
 181         return cK.encode('hex')
 182
 183     def redeem_script(self, sequence):
 184         chain, i = sequence
 185         pubkey1 = self.get_pubkey(chain, i)
 186         pubkey2 = self.get_pubkey2(chain, i)
 187         return Transaction.multisig_script([pubkey1, pubkey2], 2)
 188
 189     def get_address(self, for_change, n):
 190         address = hash_160_to_bc_address(hash_160(self.redeem_script((for_change, n)).decode('hex')), 5)
 191         return address
 192
 193     def get_pubkeys(self, sequence):
 194         return [ self.get_pubkey( *sequence ), self.get_pubkey2( *sequence )]
 195
 196     def get_master_pubkeys(self):
 197         return [self.xpub, self.xpub2]
 198
 199     def get_type(self):
 200         return _('Multisig 2 of 2')
 201
 202
 203 class BIP32_Account_2of3(BIP32_Account_2of2):
 204
 205     def __init__(self, v):
 206         BIP32_Account_2of2.__init__(self, v)
 207         self.xpub3 = v['xpub3']
 208
 209     def dump(self):
 210         d = BIP32_Account_2of2.dump(self)
 211         d['xpub3'] = self.xpub3
 212         return d
 213
 214     def get_pubkey3(self, for_change, n):
 215         _, _, _, c, cK = deserialize_xkey(self.xpub3)
 216         for i in [for_change, n]:
 217             cK, c = CKD_pub(cK, c, i)
 218         return cK.encode('hex')
 219
 220     def get_redeem_script(self, sequence):
 221         chain, i = sequence
 222         pubkey1 = self.get_pubkey(chain, i)
 223         pubkey2 = self.get_pubkey2(chain, i)
 224         pubkey3 = self.get_pubkey3(chain, i)
 225         return Transaction.multisig_script([pubkey1, pubkey2, pubkey3], 3)
 226
 227     def get_pubkeys(self, sequence):
 228         return [ self.get_pubkey( *sequence ), self.get_pubkey2( *sequence ), self.get_pubkey3( *sequence )]
 229
 230     def get_master_pubkeys(self):
 231         return [self.xpub, self.xpub2, self.xpub3]
 232
 233     def get_type(self):
 234         return _('Multisig 2 of 3')
 235
 236
 237