def sign_transaction_input(tx,
input_index,
txout_script,
intput_script_type,
secret,
compressed_pubkey=True):
# Set all txin to empty
txin_scripts_save = [txin.script for txin in tx.in_list]
for txin in tx.in_list:
txin.script = Script([])
# Set the current input script to the outpoint's script value
tx.in_list[input_index].script = txout_script
# Serialize and append hash type
enctx = TxSerializer().serialize(tx) + b"\x01\x00\x00\x00"
# Get hash and Sign
txhash = doublesha256(enctx)
key = KEY()
key.set_secret(secret, compressed_pubkey)
signature = key.sign(txhash) + "\x01" # append hash_type SIGHASH_ALL
# Restore Txin scripts
for txin, script_save in zip(tx.in_list, txin_scripts_save):
txin.script = script_save
# Set the signed script
if intput_script_type == TX_PUBKEYHASH:
tx.in_list[input_index].script = make_script_pubkeyhash_sig(
key.get_pubkey(), signature)
if intput_script_type == TX_PUBKEY:
tx.in_list[input_index].script = make_script_pubkey_sig(signature)
def test_shamir_share_private_key(self):
ssl_add_system_seeds()
k = KEY()
k.generate()
pkey_bignum = k.get_privkey_bignum()
pubkey = k.get_pubkey()
numshares = 600
threshold = 100
sharenum_bytes = 2
print "private_key_bignum:", pkey_bignum
print "public_key:", hexstr(pubkey)
print "address:", BitcoinAddress.from_publickey(pubkey, MAIN)
field = ZpField()
V = field.value_type
ZpPkey = V(pkey_bignum)
sharer = SecretSharer(field, ZpRandom(field))
shares = sharer.share(ZpPkey, threshold, [V(i+1) for i in range(numshares)])
# print shares
print "Shamir Shares: (%d/%d):" % (threshold, numshares)
shares_hex = [hexstr(base256encode(int(pt), sharenum_bytes) + base256encode(int(value), 32)) for pt, value in shares]
for share in shares_hex:
print share
# Try to reconstruct the private key using the hex encoded shares.
recombiner = SecretRecombiner(field)
for i in range(10):
random4_hex = random.sample(shares_hex, threshold)
random4_decoded = [decodehexstr(h) for h in random4_hex]
random4 = [(V(base256decode(data[:sharenum_bytes])), V(base256decode(data[sharenum_bytes:]))) for data in random4_decoded]
recombined_pkey_bignum = recombiner.recombine(random4, V(0))
assert recombined_pkey_bignum == ZpPkey
k2 = KEY()
k2.set_privkey_bignum(int(recombined_pkey_bignum))
assert k2.get_pubkey() == pubkey
print i
# With threshold-1 shares this fails
for i in range(10):
random4_hex = random.sample(shares_hex, threshold-1)
random4_decoded = [decodehexstr(h) for h in random4_hex]
random4 = [(V(base256decode(data[:sharenum_bytes])), V(base256decode(data[sharenum_bytes:]))) for data in random4_decoded]
recombined_pkey_bignum = recombiner.recombine(random4, V(0))
assert recombined_pkey_bignum != ZpPkey
def get_private_key_secret(self, public_key):
if public_key in self.wallet_database.keys: # private key is not crypted
k = KEY()
k.set_privkey(self.wallet_database.keys[public_key].private_key)
return k.get_secret()
crypted_secret = self.wallet_database.get_crypted_keys()[public_key]
for key in self.plain_masterkeys:
self.crypter.set_key(key, doublesha256(public_key))
secret = self.crypter.decrypt(crypted_secret)
k = KEY()
is_compressed = len(public_key) == 33
k.set_secret(secret, is_compressed)
if k.get_pubkey() == public_key:
return secret
raise KeyDecryptException("Can't decrypt private key, wallet not unlocked or incorrect masterkey")
def get_private_key_secret(self, public_key):
if public_key in self.wallet_database.keys: # private key is not crypted
k = KEY()
k.set_privkey(self.wallet_database.keys[public_key].private_key)
return k.get_secret()
crypted_secret = self.wallet_database.get_crypted_keys()[public_key]
for key in self.plain_masterkeys:
self.crypter.set_key(key, doublesha256(public_key))
secret = self.crypter.decrypt(crypted_secret)
k = KEY()
is_compressed = len(public_key) == 33
k.set_secret(secret, is_compressed)
if k.get_pubkey() == public_key:
return secret
raise KeyDecryptException(
"Can't decrypt private key, wallet not unlocked or incorrect masterkey"
)
def create(self, passphrase):
self.wallet_database.begin_updates()
crypter = Crypter()
#first create masterkey
master_key = new_masterkey(passphrase)
plain_masterkey = decrypt_masterkey(master_key, passphrase)
self.wallet_database.add_master_key(master_key)
#create transaction pool
for i in range(100):
k = KEY()
k.generate(True)
public_key = k.get_pubkey()
crypter.set_key(plain_masterkey, doublesha256(public_key))
crypted_secret = crypter.encrypt(k.get_secret())
self.wallet_database.add_crypted_key(public_key, crypted_secret)
pool_key = WalletPoolKey(i, 60000, time.time(), public_key)
self.wallet_database.add_poolkey(pool_key)
self.wallet_database.commit_updates()
self.load()
def create(self, passphrase):
self.wallet_database.begin_updates()
crypter = Crypter()
#first create masterkey
master_key = new_masterkey(passphrase)
plain_masterkey = decrypt_masterkey(master_key, passphrase)
self.wallet_database.add_master_key(master_key)
#create transaction pool
for i in range(100):
k = KEY()
k.generate(True)
public_key = k.get_pubkey()
crypter.set_key(plain_masterkey, doublesha256(public_key))
crypted_secret = crypter.encrypt(k.get_secret())
self.wallet_database.add_crypted_key(public_key, crypted_secret)
pool_key = WalletPoolKey(i, 60000, time.time(), public_key)
self.wallet_database.add_poolkey(pool_key)
self.wallet_database.commit_updates()
self.load()
def sign_transaction_input(tx, input_index, txout_script, intput_script_type, secret, compressed_pubkey=True):
# Set all txin to empty
txin_scripts_save = [txin.script for txin in tx.in_list]
for txin in tx.in_list:
txin.script = Script([])
# Set the current input script to the outpoint's script value
tx.in_list[input_index].script = txout_script
# Serialize and append hash type
enctx = TxSerializer().serialize(tx) + b"\x01\x00\x00\x00"
# Get hash and Sign
txhash = doublesha256(enctx)
key = KEY()
key.set_secret(secret, compressed_pubkey)
signature = key.sign(txhash) + "\x01" # append hash_type SIGHASH_ALL
# Restore Txin scripts
for txin, script_save in zip(tx.in_list, txin_scripts_save):
txin.script = script_save
# Set the signed script
if intput_script_type == TX_PUBKEYHASH:
tx.in_list[input_index].script = make_script_pubkeyhash_sig(key.get_pubkey(), signature)
if intput_script_type == TX_PUBKEY:
tx.in_list[input_index].script = make_script_pubkey_sig(signature)
def test_ssl_get_pubkey(self):
key = KEY()
key.set_secret(decodehexstr("30d1d8d1d243ab41a80a3cc1481a626a137f771a636b2daca06c1f86cdfecffb"), True)
self.assertEquals(hexstr(key.get_pubkey()), "030a43196c8bf389c0ce5987a3f4dac57f4ca0d9733c232659717d9404074b4504")