3 # Electrum - lightweight Bitcoin client
4 # Copyright (C) 2013 thomasv@gitorious
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.
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.
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/>.
23 class Account(object):
24 def __init__(self, v):
25 self.addresses = v.get('0', [])
26 self.change = v.get('1', [])
29 return {'0':self.addresses, '1':self.change}
31 def get_addresses(self, for_change):
32 return self.change[:] if for_change else self.addresses[:]
34 def create_new_address(self, for_change):
35 addresses = self.change if for_change else self.addresses
37 address = self.get_address( for_change, n)
38 addresses.append(address)
42 def get_address(self, for_change, n):
48 class OldAccount(Account):
49 """ Privatekey(type,n) = Master_private_key + H(n|S|type) """
51 def __init__(self, mpk, mpk2 = None, mpk3 = None):
57 def mpk_from_seed(klass, seed):
59 secexp = klass.stretch_key(seed)
60 master_private_key = ecdsa.SigningKey.from_secret_exponent( secexp, curve = SECP256k1 )
61 master_public_key = master_private_key.get_verifying_key().to_string().encode('hex')
62 return master_public_key
65 def stretch_key(self,seed):
67 for i in range(100000):
68 seed = hashlib.sha256(seed + oldseed).digest()
69 return string_to_number( seed )
71 def get_sequence(self, sequence, mpk):
72 for_change, n = sequence
73 return string_to_number( Hash( "%d:%d:"%(n,for_change) + mpk.decode('hex') ) )
75 def get_address(self, sequence):
77 pubkey = self.get_pubkey(sequence)
78 address = public_key_to_bc_address( pubkey.decode('hex') )
80 pubkey1 = self.get_pubkey(sequence)
81 pubkey2 = self.get_pubkey(sequence, mpk = self.mpk2)
82 address = Transaction.multisig_script([pubkey1, pubkey2], 2)["address"]
84 pubkey1 = self.get_pubkey(sequence)
85 pubkey2 = self.get_pubkey(sequence, mpk = self.mpk2)
86 pubkey3 = self.get_pubkey(sequence, mpk = self.mpk3)
87 address = Transaction.multisig_script([pubkey1, pubkey2, pubkey3], 2)["address"]
90 def get_pubkey(self, sequence, mpk=None):
92 if mpk is None: mpk = self.mpk
93 z = self.get_sequence(sequence, mpk)
94 master_public_key = ecdsa.VerifyingKey.from_string( mpk.decode('hex'), curve = SECP256k1 )
95 pubkey_point = master_public_key.pubkey.point + z*curve.generator
96 public_key2 = ecdsa.VerifyingKey.from_public_point( pubkey_point, curve = SECP256k1 )
97 return '04' + public_key2.to_string().encode('hex')
99 def get_private_key_from_stretched_exponent(self, sequence, secexp):
100 order = generator_secp256k1.order()
101 secexp = ( secexp + self.get_sequence(sequence, self.mpk) ) % order
102 pk = number_to_string( secexp, generator_secp256k1.order() )
104 return SecretToASecret( pk, compressed )
106 def get_private_key(self, sequence, seed):
107 secexp = self.stretch_key(seed)
108 return self.get_private_key_from_stretched_exponent(sequence, secexp)
110 def get_private_keys(self, sequence_list, seed):
111 secexp = self.stretch_key(seed)
112 return [ self.get_private_key_from_stretched_exponent( sequence, secexp) for sequence in sequence_list]
114 def check_seed(self, seed):
116 secexp = self.stretch_key(seed)
117 master_private_key = ecdsa.SigningKey.from_secret_exponent( secexp, curve = SECP256k1 )
118 master_public_key = master_private_key.get_verifying_key().to_string().encode('hex')
119 if master_public_key != self.mpk:
120 print_error('invalid password (mpk)')
121 raise BaseException('Invalid password')
124 def get_input_info(self, sequence):
126 pk_addr = self.get_address(sequence)
129 pubkey1 = self.get_pubkey(sequence)
130 pubkey2 = self.get_pubkey(sequence,mpk=self.mpk2)
131 pk_addr = public_key_to_bc_address( pubkey1.decode('hex') ) # we need to return that address to get the right private key
132 redeemScript = Transaction.multisig_script([pubkey1, pubkey2], 2)['redeemScript']
134 pubkey1 = self.get_pubkey(sequence)
135 pubkey2 = self.get_pubkey(sequence, mpk=self.mpk2)
136 pubkey3 = self.get_pubkey(sequence, mpk=self.mpk3)
137 pk_addr = public_key_to_bc_address( pubkey1.decode('hex') ) # we need to return that address to get the right private key
138 redeemScript = Transaction.multisig_script([pubkey1, pubkey2, pubkey3], 2)['redeemScript']
139 return pk_addr, redeemScript
143 class BIP32_Account(Account):
145 def __init__(self, v):
146 Account.__init__(self, v)
147 self.c = v['c'].decode('hex')
148 self.K = v['K'].decode('hex')
149 self.cK = v['cK'].decode('hex')
152 d = Account.dump(self)
153 d['c'] = self.c.encode('hex')
154 d['K'] = self.K.encode('hex')
155 d['cK'] = self.cK.encode('hex')
158 def get_address(self, for_change, n):
159 pubkey = self.get_pubkey(for_change, n)
160 address = public_key_to_bc_address( pubkey.decode('hex') )
163 def get_pubkey(self, for_change, n):
166 for i in [for_change, n]:
167 K, K_compressed, chain = CKD_prime(K, chain, i)
168 return K_compressed.encode('hex')
170 def redeem_script(self, sequence):
176 class BIP32_Account_2of2(BIP32_Account):
178 def __init__(self, v):
179 BIP32_Account.__init__(self, v)
180 self.c2 = v['c2'].decode('hex')
181 self.K2 = v['K2'].decode('hex')
182 self.cK2 = v['cK2'].decode('hex')
185 d = BIP32_Account.dump(self)
186 d['c2'] = self.c2.encode('hex')
187 d['K2'] = self.K2.encode('hex')
188 d['cK2'] = self.cK2.encode('hex')
191 def get_pubkey2(self, for_change, n):
194 for i in [for_change, n]:
195 K, K_compressed, chain = CKD_prime(K, chain, i)
196 return K_compressed.encode('hex')
198 def redeem_script(self, sequence):
200 pubkey1 = self.get_pubkey(chain, i)
201 pubkey2 = self.get_pubkey2(chain, i)
202 return Transaction.multisig_script([pubkey1, pubkey2], 2)
204 def get_address(self, for_change, n):
205 address = hash_160_to_bc_address(hash_160(self.redeem_script((for_change, n)).decode('hex')), 5)
209 class BIP32_Account_2of3(BIP32_Account_2of2):
211 def __init__(self, v):
212 BIP32_Account_2of2.__init__(self, v)
213 self.c3 = v['c3'].decode('hex')
214 self.K3 = v['K3'].decode('hex')
215 self.cK3 = v['cK3'].decode('hex')
218 d = BIP32_Account_2of2.dump(self)
219 d['c3'] = self.c3.encode('hex')
220 d['K3'] = self.K3.encode('hex')
221 d['cK3'] = self.cK3.encode('hex')
224 def get_pubkey3(self, for_change, n):
227 for i in [for_change, n]:
228 K, K_compressed, chain = CKD_prime(K, chain, i)
229 return K_compressed.encode('hex')
231 def get_redeem_script(self, sequence):
233 pubkey1 = self.get_pubkey(chain, i)
234 pubkey2 = self.get_pubkey2(chain, i)
235 pubkey3 = self.get_pubkey3(chain, i)
236 return Transaction.multisig_script([pubkey1, pubkey2, pubkey3], 3)