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189 lines
6.7 KiB
189 lines
6.7 KiB
#!/usr/bin/env python3
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# Copyright (c) 2015-2016 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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from test_framework.test_framework import ComparisonTestFramework
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from test_framework.util import *
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from test_framework.mininode import CTransaction, NetworkThread
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from test_framework.blocktools import create_coinbase, create_block
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from test_framework.comptool import TestInstance, TestManager
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from test_framework.script import CScript
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from io import BytesIO
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import time
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# A canonical signature consists of:
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# <30> <total len> <02> <len R> <R> <02> <len S> <S> <hashtype>
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def unDERify(tx):
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'''
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Make the signature in vin 0 of a tx non-DER-compliant,
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by adding padding after the S-value.
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'''
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scriptSig = CScript(tx.vin[0].scriptSig)
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newscript = []
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for i in scriptSig:
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if (len(newscript) == 0):
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newscript.append(i[0:-1] + b'\0' + i[-1:])
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else:
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newscript.append(i)
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tx.vin[0].scriptSig = CScript(newscript)
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'''
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This test is meant to exercise BIP66 (DER SIG).
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Connect to a single node.
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Mine 2 (version 2) blocks (save the coinbases for later).
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Generate 98 more version 2 blocks, verify the node accepts.
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Mine 749 version 3 blocks, verify the node accepts.
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Check that the new DERSIG rules are not enforced on the 750th version 3 block.
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Check that the new DERSIG rules are enforced on the 751st version 3 block.
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Mine 199 new version blocks.
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Mine 1 old-version block.
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Mine 1 new version block.
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Mine 1 old version block, see that the node rejects.
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'''
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class BIP66Test(ComparisonTestFramework):
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def __init__(self):
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self.num_nodes = 1
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def setup_network(self):
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# Must set the blockversion for this test
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self.nodes = start_nodes(1, self.options.tmpdir,
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extra_args=[['-debug', '-whitelist=127.0.0.1', '-blockversion=2']],
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binary=[self.options.testbinary])
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def run_test(self):
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test = TestManager(self, self.options.tmpdir)
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test.add_all_connections(self.nodes)
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NetworkThread().start() # Start up network handling in another thread
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test.run()
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def create_transaction(self, node, coinbase, to_address, amount):
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from_txid = node.getblock(coinbase)['tx'][0]
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inputs = [{ "txid" : from_txid, "vout" : 0}]
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outputs = { to_address : amount }
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rawtx = node.createrawtransaction(inputs, outputs)
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signresult = node.signrawtransaction(rawtx)
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tx = CTransaction()
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f = BytesIO(hex_str_to_bytes(signresult['hex']))
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tx.deserialize(f)
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return tx
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def get_tests(self):
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self.coinbase_blocks = self.nodes[0].generate(2)
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height = 3 # height of the next block to build
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self.tip = int("0x" + self.nodes[0].getbestblockhash(), 0)
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self.nodeaddress = self.nodes[0].getnewaddress()
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self.last_block_time = int(time.time())
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''' 98 more version 2 blocks '''
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test_blocks = []
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for i in range(98):
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block = create_block(self.tip, create_coinbase(height), self.last_block_time + 1)
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block.nVersion = 2
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block.rehash()
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block.solve()
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test_blocks.append([block, True])
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self.last_block_time += 1
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self.tip = block.sha256
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height += 1
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yield TestInstance(test_blocks, sync_every_block=False)
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''' Mine 749 version 3 blocks '''
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test_blocks = []
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for i in range(749):
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block = create_block(self.tip, create_coinbase(height), self.last_block_time + 1)
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block.nVersion = 3
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block.rehash()
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block.solve()
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test_blocks.append([block, True])
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self.last_block_time += 1
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self.tip = block.sha256
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height += 1
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yield TestInstance(test_blocks, sync_every_block=False)
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'''
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Check that the new DERSIG rules are not enforced in the 750th
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version 3 block.
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'''
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spendtx = self.create_transaction(self.nodes[0],
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self.coinbase_blocks[0], self.nodeaddress, 1.0)
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unDERify(spendtx)
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spendtx.rehash()
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block = create_block(self.tip, create_coinbase(height), self.last_block_time + 1)
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block.nVersion = 3
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block.vtx.append(spendtx)
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block.hashMerkleRoot = block.calc_merkle_root()
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block.rehash()
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block.solve()
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self.last_block_time += 1
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self.tip = block.sha256
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height += 1
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yield TestInstance([[block, True]])
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'''
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Check that the new DERSIG rules are enforced in the 751st version 3
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block.
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'''
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spendtx = self.create_transaction(self.nodes[0],
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self.coinbase_blocks[1], self.nodeaddress, 1.0)
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unDERify(spendtx)
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spendtx.rehash()
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block = create_block(self.tip, create_coinbase(height), self.last_block_time + 1)
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block.nVersion = 3
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block.vtx.append(spendtx)
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block.hashMerkleRoot = block.calc_merkle_root()
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block.rehash()
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block.solve()
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self.last_block_time += 1
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yield TestInstance([[block, False]])
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''' Mine 199 new version blocks on last valid tip '''
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test_blocks = []
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for i in range(199):
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block = create_block(self.tip, create_coinbase(height), self.last_block_time + 1)
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block.nVersion = 3
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block.rehash()
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block.solve()
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test_blocks.append([block, True])
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self.last_block_time += 1
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self.tip = block.sha256
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height += 1
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yield TestInstance(test_blocks, sync_every_block=False)
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''' Mine 1 old version block '''
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block = create_block(self.tip, create_coinbase(height), self.last_block_time + 1)
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block.nVersion = 2
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block.rehash()
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block.solve()
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self.last_block_time += 1
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self.tip = block.sha256
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height += 1
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yield TestInstance([[block, True]])
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''' Mine 1 new version block '''
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block = create_block(self.tip, create_coinbase(height), self.last_block_time + 1)
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block.nVersion = 3
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block.rehash()
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block.solve()
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self.last_block_time += 1
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self.tip = block.sha256
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height += 1
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yield TestInstance([[block, True]])
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''' Mine 1 old version block, should be invalid '''
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block = create_block(self.tip, create_coinbase(height), self.last_block_time + 1)
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block.nVersion = 2
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block.rehash()
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block.solve()
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self.last_block_time += 1
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yield TestInstance([[block, False]])
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if __name__ == '__main__':
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BIP66Test().main()
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