lib/tests/test_bitcoin.py

   1 import unittest
   2 import sys
   3 from ecdsa.util import number_to_string
   4
   5 from lib.bitcoin import (
   6     generator_secp256k1, point_to_ser, public_key_to_bc_address, EC_KEY,
   7     bip32_root, bip32_public_derivation, bip32_private_derivation, pw_encode,
   8     pw_decode)
   9
  10 try:
  11     import ecdsa
  12 except ImportError:
  13     sys.exit("Error: python-ecdsa does not seem to be installed. Try 'sudo pip install ecdsa'")
  14
  15 class Test_bitcoin(unittest.TestCase):
  16
  17     def test_crypto(self):
  18         for message in ["Chancellor on brink of second bailout for banks", chr(255)*512]:
  19             self.do_test_crypto(message)
  20
  21     def do_test_crypto(self, message):
  22         G = generator_secp256k1
  23         _r  = G.order()
  24         pvk = ecdsa.util.randrange( pow(2,256) ) %_r
  25
  26         Pub = pvk*G
  27         pubkey_c = point_to_ser(Pub,True)
  28         #pubkey_u = point_to_ser(Pub,False)
  29         addr_c = public_key_to_bc_address(pubkey_c)
  30         #addr_u = public_key_to_bc_address(pubkey_u)
  31
  32         #print "Private key            ", '%064x'%pvk
  33         eck = EC_KEY(number_to_string(pvk,_r))
  34
  35         #print "Compressed public key  ", pubkey_c.encode('hex')
  36         enc = EC_KEY.encrypt_message(message, pubkey_c)
  37         dec = eck.decrypt_message(enc)
  38         assert dec == message
  39
  40         #print "Uncompressed public key", pubkey_u.encode('hex')
  41         #enc2 = EC_KEY.encrypt_message(message, pubkey_u)
  42         dec2 = eck.decrypt_message(enc)
  43         assert dec2 == message
  44
  45         signature = eck.sign_message(message, True, addr_c)
  46         #print signature
  47         EC_KEY.verify_message(addr_c, signature, message)
  48
  49
  50
  51     def test_bip32(self):
  52         # see https://en.bitcoin.it/wiki/BIP_0032_TestVectors
  53         xpub, xprv = self.do_test_bip32("000102030405060708090a0b0c0d0e0f", "m/0'/1/2'/2/1000000000")
  54         assert xpub == "xpub6H1LXWLaKsWFhvm6RVpEL9P4KfRZSW7abD2ttkWP3SSQvnyA8FSVqNTEcYFgJS2UaFcxupHiYkro49S8yGasTvXEYBVPamhGW6cFJodrTHy"
  55         assert xprv == "xprvA41z7zogVVwxVSgdKUHDy1SKmdb533PjDz7J6N6mV6uS3ze1ai8FHa8kmHScGpWmj4WggLyQjgPie1rFSruoUihUZREPSL39UNdE3BBDu76"
  56
  57         xpub, xprv = self.do_test_bip32("fffcf9f6f3f0edeae7e4e1dedbd8d5d2cfccc9c6c3c0bdbab7b4b1aeaba8a5a29f9c999693908d8a8784817e7b7875726f6c696663605d5a5754514e4b484542","m/0/2147483647'/1/2147483646'/2")
  58         assert xpub == "xpub6FnCn6nSzZAw5Tw7cgR9bi15UV96gLZhjDstkXXxvCLsUXBGXPdSnLFbdpq8p9HmGsApME5hQTZ3emM2rnY5agb9rXpVGyy3bdW6EEgAtqt"
  59         assert xprv == "xprvA2nrNbFZABcdryreWet9Ea4LvTJcGsqrMzxHx98MMrotbir7yrKCEXw7nadnHM8Dq38EGfSh6dqA9QWTyefMLEcBYJUuekgW4BYPJcr9E7j"
  60
  61
  62     def do_test_bip32(self, seed, sequence):
  63         xprv, xpub = bip32_root(seed)
  64         assert sequence[0:2] == "m/"
  65         path = 'm'
  66         sequence = sequence[2:]
  67         for n in sequence.split('/'):
  68             child_path = path + '/' + n
  69             if n[-1] != "'":
  70                 xpub2 = bip32_public_derivation(xpub, path, child_path)
  71             xprv, xpub = bip32_private_derivation(xprv, path, child_path)
  72             if n[-1] != "'":
  73                 assert xpub == xpub2
  74             path = child_path
  75
  76         return xpub, xprv
  77
  78
  79     def test_aes(self):
  80         s = u'\u66f4\u7a33\u5b9a\u7684\u4ea4\u6613\u5e73\u53f0'
  81         self.do_test_aes(s, s)
  82
  83     def do_test_aes(self, s, p):
  84         enc = pw_encode(s, p)
  85         dec = pw_decode(enc, p)
  86         assert dec == s