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130 lines
4.4 KiB
130 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 = 0
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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 = 128
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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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valid = 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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