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, Hash, public_key_from_private_key, address_from_private_key,
   9     is_valid, is_private_key, mnemonic_to_seed, xpub_from_xprv)
  10
  11 try:
  12     import ecdsa
  13 except ImportError:
  14     sys.exit("Error: python-ecdsa does not seem to be installed. Try 'sudo pip install ecdsa'")
  15
  16 class Test_bitcoin(unittest.TestCase):
  17
  18     def test_crypto(self):
  19         for message in ["Chancellor on brink of second bailout for banks", chr(255)*512]:
  20             self._do_test_crypto(message)
  21
  22     def _do_test_crypto(self, message):
  23         G = generator_secp256k1
  24         _r  = G.order()
  25         pvk = ecdsa.util.randrange( pow(2,256) ) %_r
  26
  27         Pub = pvk*G
  28         pubkey_c = point_to_ser(Pub,True)
  29         #pubkey_u = point_to_ser(Pub,False)
  30         addr_c = public_key_to_bc_address(pubkey_c)
  31         #addr_u = public_key_to_bc_address(pubkey_u)
  32
  33         #print "Private key            ", '%064x'%pvk
  34         eck = EC_KEY(number_to_string(pvk,_r))
  35
  36         #print "Compressed public key  ", pubkey_c.encode('hex')
  37         enc = EC_KEY.encrypt_message(message, pubkey_c)
  38         dec = eck.decrypt_message(enc)
  39         assert dec == message
  40
  41         #print "Uncompressed public key", pubkey_u.encode('hex')
  42         #enc2 = EC_KEY.encrypt_message(message, pubkey_u)
  43         dec2 = eck.decrypt_message(enc)
  44         assert dec2 == message
  45
  46         signature = eck.sign_message(message, True, addr_c)
  47         #print signature
  48         EC_KEY.verify_message(addr_c, signature, message)
  49
  50     def test_bip32(self):
  51         # see https://en.bitcoin.it/wiki/BIP_0032_TestVectors
  52         xpub, xprv = self._do_test_bip32("000102030405060708090a0b0c0d0e0f", "m/0'/1/2'/2/1000000000", testnet=False)
  53         assert xpub == "xpub6H1LXWLaKsWFhvm6RVpEL9P4KfRZSW7abD2ttkWP3SSQvnyA8FSVqNTEcYFgJS2UaFcxupHiYkro49S8yGasTvXEYBVPamhGW6cFJodrTHy"
  54         assert xprv == "xprvA41z7zogVVwxVSgdKUHDy1SKmdb533PjDz7J6N6mV6uS3ze1ai8FHa8kmHScGpWmj4WggLyQjgPie1rFSruoUihUZREPSL39UNdE3BBDu76"
  55
  56         xpub, xprv = self._do_test_bip32("fffcf9f6f3f0edeae7e4e1dedbd8d5d2cfccc9c6c3c0bdbab7b4b1aeaba8a5a29f9c999693908d8a8784817e7b7875726f6c696663605d5a5754514e4b484542","m/0/2147483647'/1/2147483646'/2", testnet=False)
  57         assert xpub == "xpub6FnCn6nSzZAw5Tw7cgR9bi15UV96gLZhjDstkXXxvCLsUXBGXPdSnLFbdpq8p9HmGsApME5hQTZ3emM2rnY5agb9rXpVGyy3bdW6EEgAtqt"
  58         assert xprv == "xprvA2nrNbFZABcdryreWet9Ea4LvTJcGsqrMzxHx98MMrotbir7yrKCEXw7nadnHM8Dq38EGfSh6dqA9QWTyefMLEcBYJUuekgW4BYPJcr9E7j"
  59
  60     def test_bip32_testnet(self):
  61         xpub, xprv = self._do_test_bip32("000102030405060708090a0b0c0d0e0f", "m/0'/1/2'/2/1000000000", testnet=True)
  62         assert xpub == "tpubDHNy3kAG39ThyiwwsgoKY4iRenXDRtce8qdCFJZXPMCJg5dsCUHayp84raLTpvyiNA9sXPob5rgqkKvkN8S7MMyXbnEhGJMW64Cf4vFAoaF"
  63         assert xprv == "tprv8kgvuL81tmn36Fv9z38j8f4K5m1HGZRjZY2QxnXDy5PuqbP6a5TzoKWCgTcGHBu66W3TgSbAu2yX6sPza5FkHmy564Sh6gmCPUNeUt4yj2x"
  64
  65         xpub, xprv = self._do_test_bip32("fffcf9f6f3f0edeae7e4e1dedbd8d5d2cfccc9c6c3c0bdbab7b4b1aeaba8a5a29f9c999693908d8a8784817e7b7875726f6c696663605d5a5754514e4b484542","m/0/2147483647'/1/2147483646'/2", testnet=True)
  66         assert xpub == "tpubDG9qJLc8hq8PMG7y4sQEodLSocEkfj4mGrUC75b7G76mDoqybcUXvmvRsruvLeF14mhixobZwZP6LwqeFePKU83Sv8ZnxWdHBb6VzE6zbvC"
  67         assert xprv == "tprv8jTo9vZtZTSiTo6BBDjeQDgLEaipWPsrhYsQpZYoqqJNPKbCyDewkHJZhkoSHiWYCUf1Gm4TFzQxcG4D6s1J9Hsn4whDK7QYyHHokJeUuac"
  68
  69     def _do_test_bip32(self, seed, sequence, testnet):
  70         xprv, xpub = bip32_root(seed, testnet)
  71         assert sequence[0:2] == "m/"
  72         path = 'm'
  73         sequence = sequence[2:]
  74         for n in sequence.split('/'):
  75             child_path = path + '/' + n
  76             if n[-1] != "'":
  77                 xpub2 = bip32_public_derivation(xpub, path, child_path, testnet)
  78             xprv, xpub = bip32_private_derivation(xprv, path, child_path, testnet)
  79             if n[-1] != "'":
  80                 assert xpub == xpub2
  81             path = child_path
  82
  83         return xpub, xprv
  84
  85     def test_aes_homomorphic(self):
  86         """Make sure AES is homomorphic."""
  87         payload = u'\u66f4\u7a33\u5b9a\u7684\u4ea4\u6613\u5e73\u53f0'
  88         password = u'secret'
  89         enc = pw_encode(payload, password)
  90         dec = pw_decode(enc, password)
  91         self.assertEqual(dec, payload)
  92
  93     def test_aes_encode_without_password(self):
  94         """When not passed a password, pw_encode is noop on the payload."""
  95         payload = u'\u66f4\u7a33\u5b9a\u7684\u4ea4\u6613\u5e73\u53f0'
  96         enc = pw_encode(payload, None)
  97         self.assertEqual(payload, enc)
  98
  99     def test_aes_deencode_without_password(self):
 100         """When not passed a password, pw_decode is noop on the payload."""
 101         payload = u'\u66f4\u7a33\u5b9a\u7684\u4ea4\u6613\u5e73\u53f0'
 102         enc = pw_decode(payload, None)
 103         self.assertEqual(payload, enc)
 104
 105     def test_aes_decode_with_invalid_password(self):
 106         """pw_decode raises an Exception when supplied an invalid password."""
 107         payload = u"blah"
 108         password = u"uber secret"
 109         wrong_password = u"not the password"
 110         enc = pw_encode(payload, password)
 111         self.assertRaises(Exception, pw_decode, enc, wrong_password)
 112
 113     def test_hash(self):
 114         """Make sure the Hash function does sha256 twice"""
 115         payload = u"test"
 116         expected = '\x95MZI\xfdp\xd9\xb8\xbc\xdb5\xd2R&x)\x95\x7f~\xf7\xfalt\xf8\x84\x19\xbd\xc5\xe8"\t\xf4'
 117
 118         result = Hash(payload)
 119         self.assertEqual(expected, result)
 120
 121     def test_xpub_from_xprv(self):
 122         """We can derive the xpub key from a xprv."""
 123         # Taken from test vectors in https://en.bitcoin.it/wiki/BIP_0032_TestVectors
 124         xpub = "xpub6H1LXWLaKsWFhvm6RVpEL9P4KfRZSW7abD2ttkWP3SSQvnyA8FSVqNTEcYFgJS2UaFcxupHiYkro49S8yGasTvXEYBVPamhGW6cFJodrTHy"
 125         xprv = "xprvA41z7zogVVwxVSgdKUHDy1SKmdb533PjDz7J6N6mV6uS3ze1ai8FHa8kmHScGpWmj4WggLyQjgPie1rFSruoUihUZREPSL39UNdE3BBDu76"
 126
 127         result = xpub_from_xprv(xprv)
 128         self.assertEqual(result, xpub)
 129
 130     def test_xpub_from_xprv_testnet(self):
 131         """We can derive the xpub key from a xprv using testnet headers."""
 132         xpub = "tpubDHNy3kAG39ThyiwwsgoKY4iRenXDRtce8qdCFJZXPMCJg5dsCUHayp84raLTpvyiNA9sXPob5rgqkKvkN8S7MMyXbnEhGJMW64Cf4vFAoaF"
 133         xprv = "tprv8kgvuL81tmn36Fv9z38j8f4K5m1HGZRjZY2QxnXDy5PuqbP6a5TzoKWCgTcGHBu66W3TgSbAu2yX6sPza5FkHmy564Sh6gmCPUNeUt4yj2x"
 134         result = xpub_from_xprv(xprv, testnet=True)
 135         self.assertEqual(result, xpub)
 136
 137
 138 class Test_keyImport(unittest.TestCase):
 139     """ The keys used in this class are TEST keys from
 140         https://en.bitcoin.it/wiki/BIP_0032_TestVectors"""
 141
 142     private_key = "L52XzL2cMkHxqxBXRyEpnPQZGUs3uKiL3R11XbAdHigRzDozKZeW"
 143     public_key_hex = "0339a36013301597daef41fbe593a02cc513d0b55527ec2df1050e2e8ff49c85c2"
 144     main_address = "15mKKb2eos1hWa6tisdPwwDC1a5J1y9nma"
 145
 146     def test_public_key_from_private_key(self):
 147         result = public_key_from_private_key(self.private_key)
 148         self.assertEqual(self.public_key_hex, result)
 149
 150     def test_address_from_private_key(self):
 151         result = address_from_private_key(self.private_key)
 152         self.assertEqual(self.main_address, result)
 153
 154     def test_is_valid_address(self):
 155         self.assertTrue(is_valid(self.main_address))
 156         self.assertFalse(is_valid("not an address"))
 157
 158     def test_is_private_key(self):
 159         self.assertTrue(is_private_key(self.private_key))
 160         self.assertFalse(is_private_key(self.public_key_hex))
 161
 162
 163 class Test_mnemonic(unittest.TestCase):
 164
 165     def test_mnemonic_to_seed_no_passphrase(self):
 166         mnemonic = "remember you must"
 167         passphrase = ""
 168         expected = '\xa5\x05c!\x97\x8dv2\x11P\x00\x88\x1a\xfbn;\xa6m\xe4a\n"\xf7\x1a\x8e\x10\xbc\xa7\xf2c\xcfX\xa8v;F\x0f&0\x93\xd9l\xd4\xe0\x1a\xc3Y\xa0b\xbb\xd3\xa6=\x00|0\xb6\xd6\x87*Y\x02\xb5i'
 169         result = mnemonic_to_seed(mnemonic, passphrase)
 170         self.assertEqual(expected, result)
 171
 172     def test_mnemonic_to_seed_with_passphrase(self):
 173         mnemonic = "remember you must"
 174         passphrase = "secret"
 175         expected = '\x1c\x11u\xd0\xca$DsrK\xa8\xe63\x9e\xfa\x02|\xb4\xdb\xdc~\x86\xbf\xf2Z\xe6\xb6\x17D\x11S\xc0\xa1\x0f$m\xb8\xf3\xad\x12\x83@B]\xe8^\x82\x10z\xe8V\xba\x81.Ou\x1c\x93&\xe8\xac\xf6\x9a\xf9'
 176         result = mnemonic_to_seed(mnemonic, passphrase)
 177         self.assertEqual(expected, result)