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128 lines
4.4 KiB
128 lines
4.4 KiB
#!/usr/bin/env python |
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# Copyright (c) 2012-2016 The Bitcoin Core developers |
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# Distributed under the MIT software license, see the accompanying |
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# file COPYING or http://www.opensource.org/licenses/mit-license.php. |
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''' |
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Generate valid and invalid base58 address and private key test vectors. |
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Usage: |
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gen_base58_test_vectors.py valid 50 > ../../src/test/data/base58_keys_valid.json |
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gen_base58_test_vectors.py invalid 50 > ../../src/test/data/base58_keys_invalid.json |
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''' |
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# 2012 Wladimir J. van der Laan |
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# Released under MIT License |
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import os |
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from itertools import islice |
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from base58 import b58encode, b58decode, b58encode_chk, b58decode_chk, b58chars |
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import random |
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from binascii import b2a_hex |
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# key types |
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PUBKEY_ADDRESS = 48 |
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SCRIPT_ADDRESS = 5 |
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PUBKEY_ADDRESS_TEST = 111 |
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SCRIPT_ADDRESS_TEST = 196 |
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PRIVKEY = 176 |
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PRIVKEY_TEST = 239 |
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metadata_keys = ['isPrivkey', 'isTestnet', 'addrType', 'isCompressed'] |
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# templates for valid sequences |
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templates = [ |
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# prefix, payload_size, suffix, metadata |
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# None = N/A |
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((PUBKEY_ADDRESS,), 20, (), (False, False, 'pubkey', None)), |
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((SCRIPT_ADDRESS,), 20, (), (False, False, 'script', None)), |
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((PUBKEY_ADDRESS_TEST,), 20, (), (False, True, 'pubkey', None)), |
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((SCRIPT_ADDRESS_TEST,), 20, (), (False, True, 'script', None)), |
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((PRIVKEY,), 32, (), (True, False, None, False)), |
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((PRIVKEY,), 32, (1,), (True, False, None, True)), |
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((PRIVKEY_TEST,), 32, (), (True, True, None, False)), |
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((PRIVKEY_TEST,), 32, (1,), (True, True, None, True)) |
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] |
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def is_valid(v): |
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'''Check vector v for validity''' |
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result = b58decode_chk(v) |
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if result is None: |
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return False |
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for template in templates: |
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prefix = str(bytearray(template[0])) |
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suffix = str(bytearray(template[2])) |
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if result.startswith(prefix) and result.endswith(suffix): |
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if (len(result) - len(prefix) - len(suffix)) == template[1]: |
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return True |
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return False |
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def gen_valid_vectors(): |
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'''Generate valid test vectors''' |
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while True: |
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for template in templates: |
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prefix = str(bytearray(template[0])) |
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payload = os.urandom(template[1]) |
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suffix = str(bytearray(template[2])) |
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rv = b58encode_chk(prefix + payload + suffix) |
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assert is_valid(rv) |
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metadata = dict([(x,y) for (x,y) in zip(metadata_keys,template[3]) if y is not None]) |
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yield (rv, b2a_hex(payload), metadata) |
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def gen_invalid_vector(template, corrupt_prefix, randomize_payload_size, corrupt_suffix): |
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'''Generate possibly invalid vector''' |
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if corrupt_prefix: |
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prefix = os.urandom(1) |
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else: |
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prefix = str(bytearray(template[0])) |
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if randomize_payload_size: |
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payload = os.urandom(max(int(random.expovariate(0.5)), 50)) |
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else: |
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payload = os.urandom(template[1]) |
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if corrupt_suffix: |
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suffix = os.urandom(len(template[2])) |
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else: |
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suffix = str(bytearray(template[2])) |
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return b58encode_chk(prefix + payload + suffix) |
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def randbool(p = 0.5): |
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'''Return True with P(p)''' |
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return random.random() < p |
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def gen_invalid_vectors(): |
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'''Generate invalid test vectors''' |
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# start with some manual edge-cases |
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yield "", |
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yield "x", |
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while True: |
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# kinds of invalid vectors: |
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# invalid prefix |
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# invalid payload length |
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# invalid (randomized) suffix (add random data) |
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# corrupt checksum |
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for template in templates: |
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val = gen_invalid_vector(template, randbool(0.2), randbool(0.2), randbool(0.2)) |
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if random.randint(0,10)<1: # line corruption |
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if randbool(): # add random character to end |
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val += random.choice(b58chars) |
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else: # replace random character in the middle |
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n = random.randint(0, len(val)) |
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val = val[0:n] + random.choice(b58chars) + val[n+1:] |
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if not is_valid(val): |
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yield val, |
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if __name__ == '__main__': |
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import sys, json |
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iters = {'valid':gen_valid_vectors, 'invalid':gen_invalid_vectors} |
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try: |
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uiter = iters[sys.argv[1]] |
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except IndexError: |
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uiter = gen_valid_vectors |
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try: |
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count = int(sys.argv[2]) |
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except IndexError: |
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count = 0 |
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data = list(islice(uiter(), count)) |
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json.dump(data, sys.stdout, sort_keys=True, indent=4) |
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sys.stdout.write('\n') |
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