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
  22
  23 class Account(object):
  24     def __init__(self, v):
  25         self.addresses = v.get('0', [])
  26         self.change = v.get('1', [])
  27         self.name = v.get('name', 'unnamed')
  28
  29     def dump(self):
  30         return {'0':self.addresses, '1':self.change, 'name':self.name}
  31
  32     def get_name(self):
  33         return self.name
  34
  35     def get_addresses(self, for_change):
  36         return self.change[:] if for_change else self.addresses[:]
  37
  38     def create_new_address(self, for_change):
  39         addresses = self.change if for_change else self.addresses
  40         n = len(addresses)
  41         address = self.get_address( for_change, n)
  42         addresses.append(address)
  43         print address
  44         return address
  45
  46     def get_address(self, for_change, n):
  47         pass
  48
  49
  50
  51
  52 class OldAccount(Account):
  53     """  Privatekey(type,n) = Master_private_key + H(n|S|type)  """
  54
  55     def __init__(self, mpk, mpk2 = None, mpk3 = None):
  56         self.mpk = mpk
  57         self.mpk2 = mpk2
  58         self.mpk3 = mpk3
  59
  60     @classmethod
  61     def mpk_from_seed(klass, seed):
  62         curve = SECP256k1
  63         secexp = klass.stretch_key(seed)
  64         master_private_key = ecdsa.SigningKey.from_secret_exponent( secexp, curve = SECP256k1 )
  65         master_public_key = master_private_key.get_verifying_key().to_string().encode('hex')
  66         return master_public_key
  67
  68     @classmethod
  69     def stretch_key(self,seed):
  70         oldseed = seed
  71         for i in range(100000):
  72             seed = hashlib.sha256(seed + oldseed).digest()
  73         return string_to_number( seed )
  74
  75     def get_sequence(self, sequence, mpk):
  76         for_change, n = sequence
  77         return string_to_number( Hash( "%d:%d:"%(n,for_change) + mpk.decode('hex') ) )
  78
  79     def get_address(self, sequence):
  80         if not self.mpk2:
  81             pubkey = self.get_pubkey(sequence)
  82             address = public_key_to_bc_address( pubkey.decode('hex') )
  83         elif not self.mpk3:
  84             pubkey1 = self.get_pubkey(sequence)
  85             pubkey2 = self.get_pubkey(sequence, mpk = self.mpk2)
  86             address = Transaction.multisig_script([pubkey1, pubkey2], 2)["address"]
  87         else:
  88             pubkey1 = self.get_pubkey(sequence)
  89             pubkey2 = self.get_pubkey(sequence, mpk = self.mpk2)
  90             pubkey3 = self.get_pubkey(sequence, mpk = self.mpk3)
  91             address = Transaction.multisig_script([pubkey1, pubkey2, pubkey3], 2)["address"]
  92         return address
  93
  94     def get_pubkey(self, sequence, mpk=None):
  95         curve = SECP256k1
  96         if mpk is None: mpk = self.mpk
  97         z = self.get_sequence(sequence, mpk)
  98         master_public_key = ecdsa.VerifyingKey.from_string( mpk.decode('hex'), curve = SECP256k1 )
  99         pubkey_point = master_public_key.pubkey.point + z*curve.generator
 100         public_key2 = ecdsa.VerifyingKey.from_public_point( pubkey_point, curve = SECP256k1 )
 101         return '04' + public_key2.to_string().encode('hex')
 102
 103     def get_private_key_from_stretched_exponent(self, sequence, secexp):
 104         order = generator_secp256k1.order()
 105         secexp = ( secexp + self.get_sequence(sequence, self.mpk) ) % order
 106         pk = number_to_string( secexp, generator_secp256k1.order() )
 107         compressed = False
 108         return SecretToASecret( pk, compressed )
 109
 110     def get_private_key(self, sequence, seed):
 111         secexp = self.stretch_key(seed)
 112         return self.get_private_key_from_stretched_exponent(sequence, secexp)
 113
 114     def get_private_keys(self, sequence_list, seed):
 115         secexp = self.stretch_key(seed)
 116         return [ self.get_private_key_from_stretched_exponent( sequence, secexp) for sequence in sequence_list]
 117
 118     def check_seed(self, seed):
 119         curve = SECP256k1
 120         secexp = self.stretch_key(seed)
 121         master_private_key = ecdsa.SigningKey.from_secret_exponent( secexp, curve = SECP256k1 )
 122         master_public_key = master_private_key.get_verifying_key().to_string().encode('hex')
 123         if master_public_key != self.mpk:
 124             print_error('invalid password (mpk)')
 125             raise BaseException('Invalid password')
 126         return True
 127
 128     def get_input_info(self, sequence):
 129         if not self.mpk2:
 130             pk_addr = self.get_address(sequence)
 131             redeemScript = None
 132         elif not self.mpk3:
 133             pubkey1 = self.get_pubkey(sequence)
 134             pubkey2 = self.get_pubkey(sequence,mpk=self.mpk2)
 135             pk_addr = public_key_to_bc_address( pubkey1.decode('hex') ) # we need to return that address to get the right private key
 136             redeemScript = Transaction.multisig_script([pubkey1, pubkey2], 2)['redeemScript']
 137         else:
 138             pubkey1 = self.get_pubkey(sequence)
 139             pubkey2 = self.get_pubkey(sequence, mpk=self.mpk2)
 140             pubkey3 = self.get_pubkey(sequence, mpk=self.mpk3)
 141             pk_addr = public_key_to_bc_address( pubkey1.decode('hex') ) # we need to return that address to get the right private key
 142             redeemScript = Transaction.multisig_script([pubkey1, pubkey2, pubkey3], 2)['redeemScript']
 143         return pk_addr, redeemScript
 144
 145
 146
 147 class BIP32_Account(Account):
 148
 149     def __init__(self, v):
 150         Account.__init__(self, v)
 151         self.c = v['c'].decode('hex')
 152         self.K = v['K'].decode('hex')
 153         self.cK = v['cK'].decode('hex')
 154
 155     def dump(self):
 156         d = Account.dump(self)
 157         d['c'] = self.c.encode('hex')
 158         d['K'] = self.K.encode('hex')
 159         d['cK'] = self.cK.encode('hex')
 160         return d
 161
 162     def get_address(self, for_change, n):
 163         pubkey = self.get_pubkey(for_change, n)
 164         address = public_key_to_bc_address( pubkey )
 165         return address
 166
 167     def get_pubkey(self, for_change, n):
 168         K = self.K
 169         chain = self.c
 170         for i in [for_change, n]:
 171             K, K_compressed, chain = CKD_prime(K, chain, i)
 172         return K_compressed
 173
 174     def get_private_key(self, sequence, master_k):
 175         chain = self.c
 176         k = master_k
 177         for i in sequence:
 178             k, chain = CKD(k, chain, i)
 179         return SecretToASecret(k, True)
 180
 181     def get_private_keys(self, sequence_list, seed):
 182         return [ self.get_private_key( sequence, seed) for sequence in sequence_list]
 183
 184     def check_seed(self, seed):
 185         master_secret, master_chain, master_public_key, master_public_key_compressed = bip32_init(seed)
 186         assert self.mpk == (master_public_key.encode('hex'), master_chain.encode('hex'))
 187
 188     def get_input_info(self, sequence):
 189         chain, i = sequence
 190         pk_addr = self.get_address(chain, i)
 191         redeemScript = None
 192         return pk_addr, redeemScript
 193
 194
 195
 196 class BIP32_Account_2of2(BIP32_Account):
 197
 198     def __init__(self, v):
 199         BIP32_Account.__init__(self, v)
 200         self.c2 = v['c2'].decode('hex')
 201         self.K2 = v['K2'].decode('hex')
 202         self.cK2 = v['cK2'].decode('hex')
 203
 204     def dump(self):
 205         d = BIP32_Account.dump(self)
 206         d['c2'] = self.c2.encode('hex')
 207         d['K2'] = self.K2.encode('hex')
 208         d['cK2'] = self.cK2.encode('hex')
 209         return d
 210
 211     def get_pubkey2(self, for_change, n):
 212         K = self.K2
 213         chain = self.c2
 214         for i in [for_change, n]:
 215             K, K_compressed, chain = CKD_prime(K, chain, i)
 216         return K_compressed
 217
 218     def get_address(self, for_change, n):
 219         pubkey1 = self.get_pubkey(for_change, n)
 220         pubkey2 = self.get_pubkey2(for_change, n)
 221         address = Transaction.multisig_script([pubkey1.encode('hex'), pubkey2.encode('hex')], 2)["address"]
 222         return address
 223
 224     def get_input_info(self, sequence):
 225         chain, i = sequence
 226         pubkey1 = self.get_pubkey(chain, i)
 227         pubkey2 = self.get_pubkey2(chain, i)
 228         # fixme
 229         pk_addr = None # public_key_to_bc_address( pubkey1 ) # we need to return that address to get the right private key
 230         redeemScript = Transaction.multisig_script([pubkey1.encode('hex'), pubkey2.encode('hex')], 2)['redeemScript']
 231         return pk_addr, redeemScript
 232