216 lines
6.9 KiB
Python
216 lines
6.9 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 thomasv@gitorious
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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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from bitcoin import *
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from transaction import Transaction
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class Account(object):
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def __init__(self, v):
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self.addresses = v.get('0', [])
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self.change = v.get('1', [])
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def dump(self):
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return {'0':self.addresses, '1':self.change}
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def get_addresses(self, for_change):
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return self.change[:] if for_change else self.addresses[:]
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def create_new_address(self, for_change):
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addresses = self.change if for_change else self.addresses
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n = len(addresses)
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address = self.get_address( for_change, n)
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addresses.append(address)
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print address
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return address
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def get_address(self, for_change, n):
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pass
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class OldAccount(Account):
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""" Privatekey(type,n) = Master_private_key + H(n|S|type) """
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def __init__(self, v):
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self.addresses = v.get(0, [])
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self.change = v.get(1, [])
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self.mpk = v['mpk'].decode('hex')
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def dump(self):
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return {0:self.addresses, 1:self.change}
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@classmethod
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def mpk_from_seed(klass, seed):
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curve = SECP256k1
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secexp = klass.stretch_key(seed)
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master_private_key = ecdsa.SigningKey.from_secret_exponent( secexp, curve = SECP256k1 )
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master_public_key = master_private_key.get_verifying_key().to_string().encode('hex')
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return master_public_key
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@classmethod
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def stretch_key(self,seed):
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oldseed = seed
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for i in range(100000):
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seed = hashlib.sha256(seed + oldseed).digest()
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return string_to_number( seed )
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def get_sequence(self, for_change, n):
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return string_to_number( Hash( "%d:%d:"%(n,for_change) + self.mpk ) )
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def get_address(self, for_change, n):
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pubkey = self.get_pubkey(for_change, n)
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address = public_key_to_bc_address( pubkey.decode('hex') )
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return address
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def get_pubkey(self, for_change, n):
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curve = SECP256k1
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mpk = self.mpk
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z = self.get_sequence(for_change, n)
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master_public_key = ecdsa.VerifyingKey.from_string( mpk, curve = SECP256k1 )
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pubkey_point = master_public_key.pubkey.point + z*curve.generator
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public_key2 = ecdsa.VerifyingKey.from_public_point( pubkey_point, curve = SECP256k1 )
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return '04' + public_key2.to_string().encode('hex')
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def get_private_key_from_stretched_exponent(self, for_change, n, secexp):
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order = generator_secp256k1.order()
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secexp = ( secexp + self.get_sequence(for_change, n) ) % order
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pk = number_to_string( secexp, generator_secp256k1.order() )
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compressed = False
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return SecretToASecret( pk, compressed )
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def get_private_key(self, seed, sequence):
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for_change, n = sequence
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secexp = self.stretch_key(seed)
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return self.get_private_key_from_stretched_exponent(for_change, n, secexp)
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def check_seed(self, seed):
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curve = SECP256k1
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secexp = self.stretch_key(seed)
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master_private_key = ecdsa.SigningKey.from_secret_exponent( secexp, curve = SECP256k1 )
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master_public_key = master_private_key.get_verifying_key().to_string().encode('hex')
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if master_public_key != self.mpk:
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print_error('invalid password (mpk)')
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raise BaseException('Invalid password')
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return True
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def redeem_script(self, sequence):
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return None
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class BIP32_Account(Account):
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def __init__(self, v):
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Account.__init__(self, v)
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self.c = v['c'].decode('hex')
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self.K = v['K'].decode('hex')
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self.cK = v['cK'].decode('hex')
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def dump(self):
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d = Account.dump(self)
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d['c'] = self.c.encode('hex')
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d['K'] = self.K.encode('hex')
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d['cK'] = self.cK.encode('hex')
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return d
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def get_address(self, for_change, n):
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pubkey = self.get_pubkey(for_change, n)
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address = public_key_to_bc_address( pubkey.decode('hex') )
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return address
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def first_address(self):
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return self.get_address(0,0)
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def get_pubkey(self, for_change, n):
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K = self.K
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chain = self.c
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for i in [for_change, n]:
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K, K_compressed, chain = CKD_prime(K, chain, i)
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return K_compressed.encode('hex')
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def redeem_script(self, sequence):
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return None
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class BIP32_Account_2of2(BIP32_Account):
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def __init__(self, v):
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BIP32_Account.__init__(self, v)
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self.c2 = v['c2'].decode('hex')
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self.K2 = v['K2'].decode('hex')
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self.cK2 = v['cK2'].decode('hex')
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def dump(self):
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d = BIP32_Account.dump(self)
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d['c2'] = self.c2.encode('hex')
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d['K2'] = self.K2.encode('hex')
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d['cK2'] = self.cK2.encode('hex')
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return d
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def get_pubkey2(self, for_change, n):
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K = self.K2
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chain = self.c2
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for i in [for_change, n]:
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K, K_compressed, chain = CKD_prime(K, chain, i)
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return K_compressed.encode('hex')
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def redeem_script(self, sequence):
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chain, i = sequence
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pubkey1 = self.get_pubkey(chain, i)
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pubkey2 = self.get_pubkey2(chain, i)
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return Transaction.multisig_script([pubkey1, pubkey2], 2)
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def get_address(self, for_change, n):
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address = hash_160_to_bc_address(hash_160(self.redeem_script((for_change, n)).decode('hex')), 5)
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return address
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class BIP32_Account_2of3(BIP32_Account_2of2):
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def __init__(self, v):
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BIP32_Account_2of2.__init__(self, v)
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self.c3 = v['c3'].decode('hex')
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self.K3 = v['K3'].decode('hex')
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self.cK3 = v['cK3'].decode('hex')
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def dump(self):
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d = BIP32_Account_2of2.dump(self)
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d['c3'] = self.c3.encode('hex')
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d['K3'] = self.K3.encode('hex')
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d['cK3'] = self.cK3.encode('hex')
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return d
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def get_pubkey3(self, for_change, n):
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K = self.K3
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chain = self.c3
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for i in [for_change, n]:
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K, K_compressed, chain = CKD_prime(K, chain, i)
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return K_compressed.encode('hex')
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def get_redeem_script(self, sequence):
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chain, i = sequence
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pubkey1 = self.get_pubkey(chain, i)
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pubkey2 = self.get_pubkey2(chain, i)
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pubkey3 = self.get_pubkey3(chain, i)
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return Transaction.multisig_script([pubkey1, pubkey2, pubkey3], 3)
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