784f757994
Use object returned from add_p2p_connection to refer to p2ps. Add a test class attribute if it needs to be used across many methods. Don't use the p2p property.
138 lines
5.5 KiB
Python
Executable file
138 lines
5.5 KiB
Python
Executable file
#!/usr/bin/env python3
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# Copyright (c) 2015-2020 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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"""Test node responses to invalid blocks.
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In this test we connect to one node over p2p, and test block requests:
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1) Valid blocks should be requested and become chain tip.
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2) Invalid block with duplicated transaction should be re-requested.
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3) Invalid block with bad coinbase value should be rejected and not
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re-requested.
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"""
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import copy
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from test_framework.blocktools import create_block, create_coinbase, create_tx_with_script
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from test_framework.messages import COIN
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from test_framework.p2p import P2PDataStore
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from test_framework.test_framework import BitcoinTestFramework
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from test_framework.util import assert_equal
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class InvalidBlockRequestTest(BitcoinTestFramework):
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def set_test_params(self):
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self.num_nodes = 1
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self.setup_clean_chain = True
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self.extra_args = [["-whitelist=noban@127.0.0.1"]]
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def run_test(self):
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# Add p2p connection to node0
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node = self.nodes[0] # convenience reference to the node
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peer = node.add_p2p_connection(P2PDataStore())
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best_block = node.getblock(node.getbestblockhash())
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tip = int(node.getbestblockhash(), 16)
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height = best_block["height"] + 1
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block_time = best_block["time"] + 1
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self.log.info("Create a new block with an anyone-can-spend coinbase")
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height = 1
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block = create_block(tip, create_coinbase(height), block_time)
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block.solve()
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# Save the coinbase for later
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block1 = block
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tip = block.sha256
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peer.send_blocks_and_test([block1], node, success=True)
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self.log.info("Mature the block.")
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node.generatetoaddress(100, node.get_deterministic_priv_key().address)
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best_block = node.getblock(node.getbestblockhash())
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tip = int(node.getbestblockhash(), 16)
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height = best_block["height"] + 1
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block_time = best_block["time"] + 1
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# Use merkle-root malleability to generate an invalid block with
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# same blockheader (CVE-2012-2459).
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# Manufacture a block with 3 transactions (coinbase, spend of prior
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# coinbase, spend of that spend). Duplicate the 3rd transaction to
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# leave merkle root and blockheader unchanged but invalidate the block.
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# For more information on merkle-root malleability see src/consensus/merkle.cpp.
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self.log.info("Test merkle root malleability.")
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block2 = create_block(tip, create_coinbase(height), block_time)
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block_time += 1
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# b'0x51' is OP_TRUE
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tx1 = create_tx_with_script(block1.vtx[0], 0, script_sig=b'\x51', amount=50 * COIN)
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tx2 = create_tx_with_script(tx1, 0, script_sig=b'\x51', amount=50 * COIN)
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block2.vtx.extend([tx1, tx2])
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block2.hashMerkleRoot = block2.calc_merkle_root()
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block2.rehash()
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block2.solve()
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orig_hash = block2.sha256
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block2_orig = copy.deepcopy(block2)
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# Mutate block 2
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block2.vtx.append(tx2)
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assert_equal(block2.hashMerkleRoot, block2.calc_merkle_root())
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assert_equal(orig_hash, block2.rehash())
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assert block2_orig.vtx != block2.vtx
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peer.send_blocks_and_test([block2], node, success=False, reject_reason='bad-txns-duplicate')
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# Check transactions for duplicate inputs (CVE-2018-17144)
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self.log.info("Test duplicate input block.")
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block2_dup = copy.deepcopy(block2_orig)
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block2_dup.vtx[2].vin.append(block2_dup.vtx[2].vin[0])
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block2_dup.vtx[2].rehash()
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block2_dup.hashMerkleRoot = block2_dup.calc_merkle_root()
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block2_dup.rehash()
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block2_dup.solve()
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peer.send_blocks_and_test([block2_dup], node, success=False, reject_reason='bad-txns-inputs-duplicate')
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self.log.info("Test very broken block.")
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block3 = create_block(tip, create_coinbase(height), block_time)
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block_time += 1
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block3.vtx[0].vout[0].nValue = 100 * COIN # Too high!
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block3.vtx[0].sha256 = None
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block3.vtx[0].calc_sha256()
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block3.hashMerkleRoot = block3.calc_merkle_root()
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block3.rehash()
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block3.solve()
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peer.send_blocks_and_test([block3], node, success=False, reject_reason='bad-cb-amount')
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# Complete testing of CVE-2012-2459 by sending the original block.
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# It should be accepted even though it has the same hash as the mutated one.
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self.log.info("Test accepting original block after rejecting its mutated version.")
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peer.send_blocks_and_test([block2_orig], node, success=True, timeout=5)
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# Update tip info
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height += 1
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block_time += 1
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tip = int(block2_orig.hash, 16)
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# Complete testing of CVE-2018-17144, by checking for the inflation bug.
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# Create a block that spends the output of a tx in a previous block.
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block4 = create_block(tip, create_coinbase(height), block_time)
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tx3 = create_tx_with_script(tx2, 0, script_sig=b'\x51', amount=50 * COIN)
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# Duplicates input
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tx3.vin.append(tx3.vin[0])
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tx3.rehash()
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block4.vtx.append(tx3)
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block4.hashMerkleRoot = block4.calc_merkle_root()
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block4.rehash()
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block4.solve()
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self.log.info("Test inflation by duplicating input")
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peer.send_blocks_and_test([block4], node, success=False, reject_reason='bad-txns-inputs-duplicate')
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if __name__ == '__main__':
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InvalidBlockRequestTest().main()
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