AaronFiore/electrum
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mangle (for_change, index) everywhere

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thomasv
2013-03-03 10:24:30 +01:00
parent d8361b2a97
commit 27b8b21f9e
2 changed files with 31 additions and 28 deletions
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34
lib/bitcoin.py
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@@ -438,23 +438,25 @@ class DeterministicSequence:
seed = hashlib.sha256(seed + oldseed).digest()
return string_to_number( seed )
def get_sequence(self, n, for_change):
def get_sequence(self, sequence):
for_change, n = sequence
return string_to_number( Hash( "%d:%d:"%(n,for_change) + self.master_public_key.decode('hex') ) )
def get_address(self, for_change, n):
def get_address(self, sequence):
if not self.is_p2sh:
pubkey = self.get_pubkey(n, for_change)
pubkey = self.get_pubkey(sequence)
address = public_key_to_bc_address( pubkey.decode('hex') )
else:
pubkey1 = self.get_pubkey(n, for_change)
pubkey2 = self.get_pubkey2(n, for_change)
pubkey1 = self.get_pubkey(sequence)
pubkey2 = self.get_pubkey2(sequence)
address = Transaction.multisig_script([pubkey1, pubkey2], 2)["address"]
return address
#sec = self.p2sh_sequence.get_private_key(n, for_change, seed)
#addr = hash_160_to_bc_address(hash_160(txin["redeemScript"].decode('hex')), 5)
def get_pubkey2(self, n, for_change):
def get_pubkey2(self, sequence):
for_change, n = sequence
curve = SECP256k1
z = string_to_number( Hash( "%d:%d:"%(n, for_change) + self.mpk2.decode('hex') ) )
master_public_key = ecdsa.VerifyingKey.from_string( self.mpk2.decode('hex'), curve = SECP256k1 )
@@ -462,24 +464,24 @@ class DeterministicSequence:
public_key2 = ecdsa.VerifyingKey.from_public_point( pubkey_point, curve = SECP256k1 )
return '04' + public_key2.to_string().encode('hex')
def get_pubkey(self, n, for_change):
def get_pubkey(self, sequence):
curve = SECP256k1
z = self.get_sequence(n, for_change)
z = self.get_sequence(sequence)
master_public_key = ecdsa.VerifyingKey.from_string( self.master_public_key.decode('hex'), curve = SECP256k1 )
pubkey_point = master_public_key.pubkey.point + z*curve.generator
public_key2 = ecdsa.VerifyingKey.from_public_point( pubkey_point, curve = SECP256k1 )
return '04' + public_key2.to_string().encode('hex')
def get_private_key_from_stretched_exponent(self, n, for_change, secexp):
def get_private_key_from_stretched_exponent(self, sequence, secexp):
order = generator_secp256k1.order()
secexp = ( secexp + self.get_sequence(n,for_change) ) % order
secexp = ( secexp + self.get_sequence(sequence) ) % order
pk = number_to_string( secexp, generator_secp256k1.order() )
compressed = False
return SecretToASecret( pk, compressed )
def get_private_key(self, n, for_change, seed):
def get_private_key(self, sequence, seed):
secexp = self.stretch_key(seed)
return self.get_private_key_from_stretched_exponent(n, for_change, secexp)
return self.get_private_key_from_stretched_exponent(sequence, secexp)
def check_seed(self, seed):
curve = SECP256k1
@@ -493,14 +495,14 @@ class DeterministicSequence:
return True
def get_input_info(self, is_change, n):
def get_input_info(self, sequence):
if not self.is_p2sh:
pk_addr = self.get_address(is_change, n)
pk_addr = self.get_address(sequence)
redeemScript = None
else:
pubkey1 = self.get_pubkey(n, is_change)
pubkey2 = self.get_pubkey2(n, is_change)
pubkey1 = self.get_pubkey(sequence)
pubkey2 = self.get_pubkey2(sequence)
pk_addr = public_key_to_bc_address( pubkey1.decode('hex') ) # we need to return that address to get the right private key
redeemScript = Transaction.multisig_script([pubkey1, pubkey2], 2)['redeemScript']