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483 lines
17 KiB
483 lines
17 KiB
#!/usr/bin/env python
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#
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# Electrum - lightweight Bitcoin client
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# Copyright (C) 2011 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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import hashlib, base64, ecdsa, re
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def rev_hex(s):
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return s.decode('hex')[::-1].encode('hex')
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def int_to_hex(i, length=1):
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s = hex(i)[2:].rstrip('L')
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s = "0"*(2*length - len(s)) + s
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return rev_hex(s)
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def var_int(i):
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# https://en.bitcoin.it/wiki/Protocol_specification#Variable_length_integer
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if i<0xfd:
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return int_to_hex(i)
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elif i<=0xffff:
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return "fd"+int_to_hex(i,2)
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elif i<=0xffffffff:
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return "fe"+int_to_hex(i,4)
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else:
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return "ff"+int_to_hex(i,8)
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Hash = lambda x: hashlib.sha256(hashlib.sha256(x).digest()).digest()
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hash_encode = lambda x: x[::-1].encode('hex')
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hash_decode = lambda x: x.decode('hex')[::-1]
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# pywallet openssl private key implementation
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def i2d_ECPrivateKey(pkey, compressed=False):
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if compressed:
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key = '3081d30201010420' + \
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'%064x' % pkey.secret + \
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'a081a53081a2020101302c06072a8648ce3d0101022100' + \
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'%064x' % _p + \
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'3006040100040107042102' + \
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'%064x' % _Gx + \
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'022100' + \
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'%064x' % _r + \
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'020101a124032200'
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else:
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key = '308201130201010420' + \
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'%064x' % pkey.secret + \
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'a081a53081a2020101302c06072a8648ce3d0101022100' + \
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'%064x' % _p + \
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'3006040100040107044104' + \
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'%064x' % _Gx + \
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'%064x' % _Gy + \
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'022100' + \
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'%064x' % _r + \
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'020101a144034200'
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return key.decode('hex') + i2o_ECPublicKey(pkey.pubkey, compressed)
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def i2o_ECPublicKey(pubkey, compressed=False):
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# public keys are 65 bytes long (520 bits)
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# 0x04 + 32-byte X-coordinate + 32-byte Y-coordinate
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# 0x00 = point at infinity, 0x02 and 0x03 = compressed, 0x04 = uncompressed
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# compressed keys: <sign> <x> where <sign> is 0x02 if y is even and 0x03 if y is odd
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if compressed:
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if pubkey.point.y() & 1:
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key = '03' + '%064x' % pubkey.point.x()
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else:
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key = '02' + '%064x' % pubkey.point.x()
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else:
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key = '04' + \
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'%064x' % pubkey.point.x() + \
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'%064x' % pubkey.point.y()
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return key.decode('hex')
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# end pywallet openssl private key implementation
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############ functions from pywallet #####################
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def hash_160(public_key):
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try:
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md = hashlib.new('ripemd160')
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md.update(hashlib.sha256(public_key).digest())
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return md.digest()
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except:
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import ripemd
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md = ripemd.new(hashlib.sha256(public_key).digest())
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return md.digest()
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def public_key_to_bc_address(public_key):
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h160 = hash_160(public_key)
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return hash_160_to_bc_address(h160)
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def hash_160_to_bc_address(h160, addrtype = 0):
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vh160 = chr(addrtype) + h160
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h = Hash(vh160)
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addr = vh160 + h[0:4]
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return b58encode(addr)
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def bc_address_to_hash_160(addr):
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bytes = b58decode(addr, 25)
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return ord(bytes[0]), bytes[1:21]
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def encode_point(pubkey, compressed=False):
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order = generator_secp256k1.order()
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p = pubkey.pubkey.point
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x_str = ecdsa.util.number_to_string(p.x(), order)
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y_str = ecdsa.util.number_to_string(p.y(), order)
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if compressed:
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return chr(2 + (p.y() & 1)) + x_str
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else:
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return chr(4) + pubkey.to_string() #x_str + y_str
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__b58chars = '123456789ABCDEFGHJKLMNPQRSTUVWXYZabcdefghijkmnopqrstuvwxyz'
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__b58base = len(__b58chars)
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def b58encode(v):
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""" encode v, which is a string of bytes, to base58."""
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long_value = 0L
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for (i, c) in enumerate(v[::-1]):
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long_value += (256**i) * ord(c)
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result = ''
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while long_value >= __b58base:
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div, mod = divmod(long_value, __b58base)
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result = __b58chars[mod] + result
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long_value = div
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result = __b58chars[long_value] + result
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# Bitcoin does a little leading-zero-compression:
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# leading 0-bytes in the input become leading-1s
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nPad = 0
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for c in v:
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if c == '\0': nPad += 1
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else: break
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return (__b58chars[0]*nPad) + result
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def b58decode(v, length):
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""" decode v into a string of len bytes."""
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long_value = 0L
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for (i, c) in enumerate(v[::-1]):
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long_value += __b58chars.find(c) * (__b58base**i)
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result = ''
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while long_value >= 256:
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div, mod = divmod(long_value, 256)
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result = chr(mod) + result
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long_value = div
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result = chr(long_value) + result
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nPad = 0
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for c in v:
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if c == __b58chars[0]: nPad += 1
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else: break
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result = chr(0)*nPad + result
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if length is not None and len(result) != length:
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return None
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return result
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def EncodeBase58Check(vchIn):
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hash = Hash(vchIn)
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return b58encode(vchIn + hash[0:4])
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def DecodeBase58Check(psz):
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vchRet = b58decode(psz, None)
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key = vchRet[0:-4]
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csum = vchRet[-4:]
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hash = Hash(key)
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cs32 = hash[0:4]
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if cs32 != csum:
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return None
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else:
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return key
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def PrivKeyToSecret(privkey):
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return privkey[9:9+32]
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def SecretToASecret(secret, compressed=False, addrtype=0):
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vchIn = chr((addrtype+128)&255) + secret
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if compressed: vchIn += '\01'
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return EncodeBase58Check(vchIn)
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def ASecretToSecret(key, addrtype=0):
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vch = DecodeBase58Check(key)
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if vch and vch[0] == chr((addrtype+128)&255):
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return vch[1:]
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else:
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return False
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def regenerate_key(sec):
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b = ASecretToSecret(sec)
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if not b:
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return False
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b = b[0:32]
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secret = int('0x' + b.encode('hex'), 16)
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return EC_KEY(secret)
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def GetPubKey(pubkey, compressed=False):
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return i2o_ECPublicKey(pubkey, compressed)
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def GetPrivKey(pkey, compressed=False):
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return i2d_ECPrivateKey(pkey, compressed)
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def GetSecret(pkey):
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return ('%064x' % pkey.secret).decode('hex')
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def is_compressed(sec):
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b = ASecretToSecret(sec)
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return len(b) == 33
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########### end pywallet functions #######################
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# secp256k1, http://www.oid-info.com/get/1.3.132.0.10
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_p = 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEFFFFFC2FL
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_r = 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEBAAEDCE6AF48A03BBFD25E8CD0364141L
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_b = 0x0000000000000000000000000000000000000000000000000000000000000007L
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_a = 0x0000000000000000000000000000000000000000000000000000000000000000L
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_Gx = 0x79BE667EF9DCBBAC55A06295CE870B07029BFCDB2DCE28D959F2815B16F81798L
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_Gy = 0x483ada7726a3c4655da4fbfc0e1108a8fd17b448a68554199c47d08ffb10d4b8L
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curve_secp256k1 = ecdsa.ellipticcurve.CurveFp( _p, _a, _b )
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generator_secp256k1 = ecdsa.ellipticcurve.Point( curve_secp256k1, _Gx, _Gy, _r )
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oid_secp256k1 = (1,3,132,0,10)
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SECP256k1 = ecdsa.curves.Curve("SECP256k1", curve_secp256k1, generator_secp256k1, oid_secp256k1 )
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class EC_KEY(object):
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def __init__( self, secret ):
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self.pubkey = ecdsa.ecdsa.Public_key( generator_secp256k1, generator_secp256k1 * secret )
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self.privkey = ecdsa.ecdsa.Private_key( self.pubkey, secret )
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self.secret = secret
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###################################### BIP32 ##############################
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def bip32_init(seed):
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import hmac
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I = hmac.new("Bitcoin seed", seed, hashlib.sha512).digest()
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print "seed", seed.encode('hex')
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master_secret = I[0:32]
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master_chain = I[32:]
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# public key
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curve = SECP256k1
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master_private_key = ecdsa.SigningKey.from_string( master_secret, curve = SECP256k1 )
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master_public_key = master_private_key.get_verifying_key()
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K = master_public_key.to_string()
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K_compressed = GetPubKey(master_public_key.pubkey,True)
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return master_secret, master_chain, K, K_compressed
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def CKD(k, c, n):
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import hmac
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from ecdsa.util import string_to_number, number_to_string
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order = generator_secp256k1.order()
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keypair = EC_KEY(string_to_number(k))
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K = GetPubKey(keypair.pubkey,True)
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I = hmac.new(c, K + rev_hex(int_to_hex(n,4)).decode('hex'), hashlib.sha512).digest()
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k_n = number_to_string( (string_to_number(I[0:32]) * string_to_number(k)) % order , order )
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c_n = I[32:]
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return k_n, c_n
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def CKD_prime(K, c, n):
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import hmac
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from ecdsa.util import string_to_number, number_to_string
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order = generator_secp256k1.order()
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K_public_key = ecdsa.VerifyingKey.from_string( K, curve = SECP256k1 )
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K_compressed = GetPubKey(K_public_key.pubkey,True)
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I = hmac.new(c, K_compressed + rev_hex(int_to_hex(n,4)).decode('hex'), hashlib.sha512).digest()
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#pubkey = ecdsa.ecdsa.Public_key( generator_secp256k1, string_to_number(I[0:32]) * K_public_key.pubkey.point )
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public_key = ecdsa.VerifyingKey.from_public_point( string_to_number(I[0:32]) * K_public_key.pubkey.point, curve = SECP256k1 )
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K_n = public_key.to_string()
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K_n_compressed = GetPubKey(public_key.pubkey,True)
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c_n = I[32:]
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return K_n, K_n_compressed, c_n
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################################## transactions
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def tx_filter(s):
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out = re.sub('( [^\n]*|)\n','',s)
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out = out.replace(' ','')
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out = out.replace('\n','')
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return out
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def raw_tx( inputs, outputs, for_sig = None ):
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s = int_to_hex(1,4) # version
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s += var_int( len(inputs) ) # number of inputs
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for i in range(len(inputs)):
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_, _, p_hash, p_index, p_script, pubkeysig = inputs[i]
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s += p_hash.decode('hex')[::-1].encode('hex') # prev hash
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s += int_to_hex(p_index,4) # prev index
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if for_sig is None:
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if len(pubkeysig) == 1:
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pubkey, sig = pubkeysig[0]
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sig = sig + chr(1) # hashtype
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script = int_to_hex( len(sig))
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script += sig.encode('hex')
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script += int_to_hex( len(pubkey))
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script += pubkey.encode('hex')
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else:
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pubkey0, sig0 = pubkeysig[0]
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pubkey1, sig1 = pubkeysig[1]
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sig0 = sig0 + chr(1)
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sig1 = sig1 + chr(1)
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inner_script = multisig_script([pubkey0, pubkey1])
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script = '00' # op_0
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script += int_to_hex(len(sig0))
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script += sig0.encode('hex')
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script += int_to_hex(len(sig1))
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script += sig1.encode('hex')
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script += var_int(len(inner_script)/2)
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script += inner_script
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elif for_sig==i:
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if len(pubkeysig) > 1:
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script = multisig_script(pubkeysig) # p2sh uses the inner script
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else:
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script = p_script # scriptsig
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else:
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script=''
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s += var_int( len(tx_filter(script))/2 ) # script length
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s += script
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s += "ffffffff" # sequence
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s += var_int( len(outputs) ) # number of outputs
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for output in outputs:
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addr, amount = output
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s += int_to_hex( amount, 8) # amount
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addrtype, hash_160 = bc_address_to_hash_160(addr)
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if addrtype == 0:
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script = '76a9' # op_dup, op_hash_160
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script += '14' # push 0x14 bytes
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script += hash_160.encode('hex')
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script += '88ac' # op_equalverify, op_checksig
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elif addrtype == 5:
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script = 'a9' # op_hash_160
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script += '14' # push 0x14 bytes
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script += hash_160.encode('hex')
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script += '87' # op_equal
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else:
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raise
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s += var_int( len(tx_filter(script))/2 ) # script length
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s += script # script
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s += int_to_hex(0,4) # lock time
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if for_sig is not None: s += int_to_hex(1, 4) # hash type
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return tx_filter(s)
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def multisig_script(public_keys):
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# supports only "2 of 2", and "2 of 3" transactions
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n = len(public_keys)
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s = '52'
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for k in public_keys:
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s += var_int(len(k)/2)
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s += k
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if n==2:
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s += '52'
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elif n==3:
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s += '53'
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else:
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raise
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s += 'ae'
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return s
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def test_bip32():
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seed = "ff000000000000000000000000000000".decode('hex')
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master_secret, master_chain, master_public_key, master_public_key_compressed = bip32_init(seed)
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print "secret key", master_secret.encode('hex')
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print "chain code", master_chain.encode('hex')
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key_id = hash_160(master_public_key_compressed)
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print "keyid", key_id.encode('hex')
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print "base58"
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print "address", hash_160_to_bc_address(key_id)
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print "secret key", SecretToASecret(master_secret, True)
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print "-- m/0 --"
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k0, c0 = CKD(master_secret, master_chain, 0)
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print "secret", k0.encode('hex')
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print "chain", c0.encode('hex')
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print "secret key", SecretToASecret(k0, True)
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K0, K0_compressed, c0 = CKD_prime(master_public_key, master_chain, 0)
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print "address", hash_160_to_bc_address(hash_160(K0_compressed))
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print "-- m/0/1 --"
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K01, K01_compressed, c01 = CKD_prime(K0, c0, 1)
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print "address", hash_160_to_bc_address(hash_160(K01_compressed))
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print "-- m/0/1/3 --"
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K013, K013_compressed, c013 = CKD_prime(K01, c01, 3)
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print "address", hash_160_to_bc_address(hash_160(K013_compressed))
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print "-- m/0/1/3/7 --"
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K0137, K0137_compressed, c0137 = CKD_prime(K013, c013, 7)
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print "address", hash_160_to_bc_address(hash_160(K0137_compressed))
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def test_p2sh():
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print "2 of 2"
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pubkeys = ["04e89a79651522201d756f14b1874ae49139cc984e5782afeca30ffe84e5e6b2cfadcfe9875c490c8a1a05a4debd715dd57471af8886ab5dfbb3959d97f087f77a",
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"0455cf4a3ab68a011b18cb0a86aae2b8e9cad6c6355476de05247c57a9632d127084ac7630ad89893b43c486c5a9f7ec6158fb0feb708fa9255d5c4d44bc0858f8"]
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s = multisig_script(pubkeys)
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print "address", hash_160_to_bc_address(hash_160(s.decode('hex')), 5)
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print "Gavin's tutorial: redeem p2sh: http://blockchain.info/tx-index/30888901"
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pubkey1 = "0491bba2510912a5bd37da1fb5b1673010e43d2c6d812c514e91bfa9f2eb129e1c183329db55bd868e209aac2fbc02cb33d98fe74bf23f0c235d6126b1d8334f86"
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pubkey2 = "04865c40293a680cb9c020e7b1e106d8c1916d3cef99aa431a56d253e69256dac09ef122b1a986818a7cb624532f062c1d1f8722084861c5c3291ccffef4ec6874"
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pubkey3 = "048d2455d2403e08708fc1f556002f1b6cd83f992d085097f9974ab08a28838f07896fbab08f39495e15fa6fad6edbfb1e754e35fa1c7844c41f322a1863d46213"
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pubkeys = [pubkey1, pubkey2, pubkey3]
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tx_for_sig = raw_tx( [(None, None, '3c9018e8d5615c306d72397f8f5eef44308c98fb576a88e030c25456b4f3a7ac', 0, 'a914f815b036d9bbbce5e9f2a00abd1bf3dc91e9551087', pubkeys)],
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[('1GtpSrGhRGY5kkrNz4RykoqRQoJuG2L6DS',1000000)], for_sig = 0)
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|
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print "tx for sig", tx_for_sig
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|
|
signature1 = "304502200187af928e9d155c4b1ac9c1c9118153239aba76774f775d7c1f9c3e106ff33c0221008822b0f658edec22274d0b6ae9de10ebf2da06b1bbdaaba4e50eb078f39e3d78"
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signature2 = "30440220795f0f4f5941a77ae032ecb9e33753788d7eb5cb0c78d805575d6b00a1d9bfed02203e1f4ad9332d1416ae01e27038e945bc9db59c732728a383a6f1ed2fb99da7a4"
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|
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for pubkey in pubkeys:
|
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import traceback, sys
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|
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public_key = ecdsa.VerifyingKey.from_string(pubkey[2:].decode('hex'), curve = SECP256k1)
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|
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try:
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public_key.verify_digest( signature1.decode('hex'), Hash( tx_for_sig.decode('hex') ), sigdecode = ecdsa.util.sigdecode_der)
|
|
print True
|
|
except ecdsa.keys.BadSignatureError:
|
|
#traceback.print_exc(file=sys.stdout)
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|
print False
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|
|
|
try:
|
|
public_key.verify_digest( signature2.decode('hex'), Hash( tx_for_sig.decode('hex') ), sigdecode = ecdsa.util.sigdecode_der)
|
|
print True
|
|
except ecdsa.keys.BadSignatureError:
|
|
#traceback.print_exc(file=sys.stdout)
|
|
print False
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|
|
|
if __name__ == '__main__':
|
|
#test_bip32()
|
|
test_p2sh()
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|
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