Initial Vexta Core v0.1.0 release

test/functional/p2p_invalid_block.py

@@ -0,0 +1,156 @@
+#!/usr/bin/env python3
+# Copyright (c) 2021-2022 The DigiByte Core developers
+# Distributed under the MIT software license, see the accompanying
+# file COPYING or http://www.opensource.org/licenses/mit-license.php.
+"""Test node responses to invalid blocks.
+
+In this test we connect to one node over p2p, and test block requests:
+1) Valid blocks should be requested and become chain tip.
+2) Invalid block with duplicated transaction should be re-requested.
+3) Invalid block with bad coinbase value should be rejected and not
+re-requested.
+4) Invalid block due to future timestamp is later accepted when that timestamp
+becomes valid.
+"""
+import copy
+import time
+
+from test_framework.blocktools import create_block, create_coinbase, create_tx_with_script
+from test_framework.messages import COIN
+from test_framework.p2p import P2PDataStore
+from test_framework.test_framework import DigiByteTestFramework
+from test_framework.util import assert_equal
+
+MAX_FUTURE_BLOCK_TIME = 2 * 60 * 60
+
+
+class InvalidBlockRequestTest(DigiByteTestFramework):
+    def set_test_params(self):
+        self.num_nodes = 1
+        self.setup_clean_chain = True
+        self.extra_args = [["-whitelist=noban@127.0.0.1"]]
+
+    def run_test(self):
+        # Add p2p connection to node0
+        node = self.nodes[0]  # convenience reference to the node
+        peer = node.add_p2p_connection(P2PDataStore())
+
+        best_block = node.getblock(node.getbestblockhash())
+        tip = int(node.getbestblockhash(), 16)
+        height = best_block["height"] + 1
+        block_time = best_block["time"] + 1
+
+        self.log.info("Create a new block with an anyone-can-spend coinbase")
+
+        height = 1
+        block = create_block(tip, create_coinbase(height), block_time)
+        block.solve()
+        # Save the coinbase for later
+        block1 = block
+        tip = block.sha256
+        peer.send_blocks_and_test([block1], node, success=True)
+
+        self.log.info("Mature the block.")
+        self.generatetoaddress(node, 100, node.get_deterministic_priv_key().address)
+
+        best_block = node.getblock(node.getbestblockhash())
+        tip = int(node.getbestblockhash(), 16)
+        height = best_block["height"] + 1
+        block_time = best_block["time"] + 1
+
+        # Use merkle-root malleability to generate an invalid block with
+        # same blockheader (CVE-2012-2459).
+        # Manufacture a block with 3 transactions (coinbase, spend of prior
+        # coinbase, spend of that spend).  Duplicate the 3rd transaction to
+        # leave merkle root and blockheader unchanged but invalidate the block.
+        # For more information on merkle-root malleability see src/consensus/merkle.cpp.
+        self.log.info("Test merkle root malleability.")
+
+        block2 = create_block(tip, create_coinbase(height), block_time)
+        block_time += 1
+
+        # b'0x51' is OP_TRUE
+        tx1 = create_tx_with_script(block1.vtx[0], 0, script_sig=b'\x51', amount=50 * COIN)
+        tx2 = create_tx_with_script(tx1, 0, script_sig=b'\x51', amount=50 * COIN)
+
+        block2.vtx.extend([tx1, tx2])
+        block2.hashMerkleRoot = block2.calc_merkle_root()
+        block2.rehash()
+        block2.solve()
+        orig_hash = block2.sha256
+        block2_orig = copy.deepcopy(block2)
+
+        # Mutate block 2
+        block2.vtx.append(tx2)
+        assert_equal(block2.hashMerkleRoot, block2.calc_merkle_root())
+        assert_equal(orig_hash, block2.rehash())
+        assert block2_orig.vtx != block2.vtx
+
+        peer.send_blocks_and_test([block2], node, success=False, reject_reason='bad-txns-duplicate')
+
+        # Check transactions for duplicate inputs (CVE-2018-17144)
+        self.log.info("Test duplicate input block.")
+
+        block2_dup = copy.deepcopy(block2_orig)
+        block2_dup.vtx[2].vin.append(block2_dup.vtx[2].vin[0])
+        block2_dup.vtx[2].rehash()
+        block2_dup.hashMerkleRoot = block2_dup.calc_merkle_root()
+        block2_dup.rehash()
+        block2_dup.solve()
+        peer.send_blocks_and_test([block2_dup], node, success=False, reject_reason='bad-txns-inputs-duplicate')
+
+        self.log.info("Test very broken block.")
+
+        block3 = create_block(tip, create_coinbase(height), block_time)
+        block_time += 1
+        block3.vtx[0].vout[0].nValue = 73000 * COIN  # Too high!
+        block3.vtx[0].sha256 = None
+        block3.vtx[0].calc_sha256()
+        block3.hashMerkleRoot = block3.calc_merkle_root()
+        block3.rehash()
+        block3.solve()
+
+        peer.send_blocks_and_test([block3], node, success=False, reject_reason='bad-cb-amount')
+
+
+        # Complete testing of CVE-2012-2459 by sending the original block.
+        # It should be accepted even though it has the same hash as the mutated one.
+
+        self.log.info("Test accepting original block after rejecting its mutated version.")
+        peer.send_blocks_and_test([block2_orig], node, success=True, timeout=5)
+
+        # Update tip info
+        height += 1
+        block_time += 1
+        tip = int(block2_orig.hash, 16)
+
+        # Complete testing of CVE-2018-17144, by checking for the inflation bug.
+        # Create a block that spends the output of a tx in a previous block.
+        block4 = create_block(tip, create_coinbase(height), block_time)
+        tx3 = create_tx_with_script(tx2, 0, script_sig=b'\x51', amount=50 * COIN)
+
+        # Duplicates input
+        tx3.vin.append(tx3.vin[0])
+        tx3.rehash()
+        block4.vtx.append(tx3)
+        block4.hashMerkleRoot = block4.calc_merkle_root()
+        block4.rehash()
+        block4.solve()
+        self.log.info("Test inflation by duplicating input")
+        peer.send_blocks_and_test([block4], node, success=False,  reject_reason='bad-txns-inputs-duplicate')
+
+        self.log.info("Test accepting identical block after rejecting it due to a future timestamp.")
+        t = int(time.time())
+        node.setmocktime(t)
+        # Set block time +1 second past max future validity
+        block = create_block(tip, create_coinbase(height), t + MAX_FUTURE_BLOCK_TIME + 1)
+        block.hashMerkleRoot = block.calc_merkle_root()
+        block.solve()
+        # Need force_send because the block will get rejected without a getdata otherwise
+        peer.send_blocks_and_test([block], node, force_send=True, success=False, reject_reason='time-too-new')
+        node.setmocktime(t + 1)
+        peer.send_blocks_and_test([block], node, success=True)
+
+
+if __name__ == '__main__':
+    InvalidBlockRequestTest().main()