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| 1 | +#!/usr/bin/env python3 |
| 2 | +# Copyright (c) 2022 The Bitcoin Core developers |
| 3 | +# Distributed under the MIT software license, see the accompanying |
| 4 | +# file COPYING or http://www.opensource.org/licenses/mit-license.php. |
| 5 | +""" |
| 6 | +Test encrypted v2 p2p proposed in BIP 324 |
| 7 | +""" |
| 8 | +from test_framework.blocktools import ( |
| 9 | + create_block, |
| 10 | + create_coinbase, |
| 11 | +) |
| 12 | +from test_framework.p2p import ( |
| 13 | + P2PDataStore, |
| 14 | + P2PInterface, |
| 15 | +) |
| 16 | +from test_framework.test_framework import BitcoinTestFramework |
| 17 | +from test_framework.util import ( |
| 18 | + assert_equal, |
| 19 | + assert_greater_than, |
| 20 | + check_node_connections, |
| 21 | +) |
| 22 | +from test_framework.crypto.chacha20 import REKEY_INTERVAL |
| 23 | + |
| 24 | + |
| 25 | +class P2PEncrypted(BitcoinTestFramework): |
| 26 | + def set_test_params(self): |
| 27 | + self.num_nodes = 2 |
| 28 | + self.extra_args = [["-v2transport=1"], ["-v2transport=1"]] |
| 29 | + |
| 30 | + def setup_network(self): |
| 31 | + self.setup_nodes() |
| 32 | + |
| 33 | + def generate_blocks(self, node, number): |
| 34 | + test_blocks = [] |
| 35 | + last_block = node.getbestblockhash() |
| 36 | + tip = int(last_block, 16) |
| 37 | + tipheight = node.getblockcount() |
| 38 | + last_block_time = node.getblock(last_block)['time'] |
| 39 | + for _ in range(number): |
| 40 | + # Create some blocks |
| 41 | + block = create_block(tip, create_coinbase(tipheight + 1), last_block_time + 1) |
| 42 | + block.solve() |
| 43 | + test_blocks.append(block) |
| 44 | + tip = block.sha256 |
| 45 | + tipheight += 1 |
| 46 | + last_block_time += 1 |
| 47 | + return test_blocks |
| 48 | + |
| 49 | + def create_test_block(self, txs): |
| 50 | + block = create_block(self.tip, create_coinbase(self.tipheight + 1), self.last_block_time + 600, txlist=txs) |
| 51 | + block.solve() |
| 52 | + return block |
| 53 | + |
| 54 | + def run_test(self): |
| 55 | + node0, node1 = self.nodes[0], self.nodes[1] |
| 56 | + self.log.info("Check inbound connection to v2 TestNode from v2 P2PConnection is v2") |
| 57 | + peer1 = node0.add_p2p_connection(P2PInterface(), wait_for_verack=True, supports_v2_p2p=True) |
| 58 | + assert peer1.supports_v2_p2p |
| 59 | + assert_equal(node0.getpeerinfo()[-1]["transport_protocol_type"], "v2") |
| 60 | + |
| 61 | + self.log.info("Check inbound connection to v2 TestNode from v1 P2PConnection is v1") |
| 62 | + peer2 = node0.add_p2p_connection(P2PInterface(), wait_for_verack=True, supports_v2_p2p=False) |
| 63 | + assert not peer2.supports_v2_p2p |
| 64 | + assert_equal(node0.getpeerinfo()[-1]["transport_protocol_type"], "v1") |
| 65 | + |
| 66 | + self.log.info("Check outbound connection from v2 TestNode to v1 P2PConnection advertised as v1 is v1") |
| 67 | + peer3 = node0.add_outbound_p2p_connection(P2PInterface(), p2p_idx=0, supports_v2_p2p=False, advertise_v2_p2p=False) |
| 68 | + assert not peer3.supports_v2_p2p |
| 69 | + assert_equal(node0.getpeerinfo()[-1]["transport_protocol_type"], "v1") |
| 70 | + |
| 71 | + # v2 TestNode performs downgrading here |
| 72 | + self.log.info("Check outbound connection from v2 TestNode to v1 P2PConnection advertised as v2 is v1") |
| 73 | + peer4 = node0.add_outbound_p2p_connection(P2PInterface(), p2p_idx=1, supports_v2_p2p=False, advertise_v2_p2p=True) |
| 74 | + assert not peer4.supports_v2_p2p |
| 75 | + assert_equal(node0.getpeerinfo()[-1]["transport_protocol_type"], "v1") |
| 76 | + |
| 77 | + self.log.info("Check outbound connection from v2 TestNode to v2 P2PConnection advertised as v2 is v2") |
| 78 | + peer5 = node0.add_outbound_p2p_connection(P2PInterface(), p2p_idx=2, supports_v2_p2p=True, advertise_v2_p2p=True) |
| 79 | + assert peer5.supports_v2_p2p |
| 80 | + assert_equal(node0.getpeerinfo()[-1]["transport_protocol_type"], "v2") |
| 81 | + |
| 82 | + self.log.info("Check if version is sent and verack is received in inbound/outbound connections") |
| 83 | + assert_equal(len(node0.getpeerinfo()), 5) # check if above 5 connections are present in node0's getpeerinfo() |
| 84 | + for peer in node0.getpeerinfo(): |
| 85 | + assert_greater_than(peer['bytessent_per_msg']['version'], 0) |
| 86 | + assert_greater_than(peer['bytesrecv_per_msg']['verack'], 0) |
| 87 | + |
| 88 | + self.log.info("Testing whether blocks propagate - check if tips sync when number of blocks >= REKEY_INTERVAL") |
| 89 | + # tests whether rekeying (which happens every REKEY_INTERVAL packets) works correctly |
| 90 | + test_blocks = self.generate_blocks(node0, REKEY_INTERVAL+1) |
| 91 | + |
| 92 | + for i in range(2): |
| 93 | + peer6 = node0.add_p2p_connection(P2PDataStore(), supports_v2_p2p=True) |
| 94 | + assert peer6.supports_v2_p2p |
| 95 | + assert_equal(node0.getpeerinfo()[-1]["transport_protocol_type"], "v2") |
| 96 | + |
| 97 | + # Consider: node0 <-- peer6. node0 and node1 aren't connected here. |
| 98 | + # Construct the following topology: node1 <--> node0 <-- peer6 |
| 99 | + # and test that blocks produced by peer6 will be received by node1 if sent normally |
| 100 | + # and won't be received by node1 if sent as decoy messages |
| 101 | + |
| 102 | + # First, check whether blocks produced be peer6 are received by node0 if sent normally |
| 103 | + # and not received by node0 if sent as decoy messages. |
| 104 | + if i: |
| 105 | + # check that node0 receives blocks produced by peer6 |
| 106 | + self.log.info("Check if blocks produced by node0's p2p connection is received by node0") |
| 107 | + peer6.send_blocks_and_test(test_blocks, node0, success=True) # node0's tip advances |
| 108 | + else: |
| 109 | + # check that node0 doesn't receive blocks produced by peer6 since they are sent as decoy messages |
| 110 | + self.log.info("Check if blocks produced by node0's p2p connection sent as decoys aren't received by node0") |
| 111 | + peer6.send_blocks_and_test(test_blocks, node0, success=False, is_decoy=True) # node0's tip doesn't advance |
| 112 | + |
| 113 | + # Then, connect node0 and node1 using v2 and check whether the blocks are received by node1 |
| 114 | + self.connect_nodes(0, 1, peer_advertises_v2=True) |
| 115 | + self.log.info("Wait for node1 to receive all the blocks from node0") |
| 116 | + self.sync_all() |
| 117 | + self.log.info("Make sure node0 and node1 have same block tips") |
| 118 | + assert_equal(node0.getbestblockhash(), node1.getbestblockhash()) |
| 119 | + |
| 120 | + self.disconnect_nodes(0, 1) |
| 121 | + |
| 122 | + self.log.info("Check the connections opened as expected") |
| 123 | + check_node_connections(node=node0, num_in=4, num_out=3) |
| 124 | + |
| 125 | + self.log.info("Check inbound connection to v1 TestNode from v2 P2PConnection is v1") |
| 126 | + self.restart_node(0, ["-v2transport=0"]) |
| 127 | + peer1 = node0.add_p2p_connection(P2PInterface(), wait_for_verack=True, supports_v2_p2p=True) |
| 128 | + assert not peer1.supports_v2_p2p |
| 129 | + assert_equal(node0.getpeerinfo()[-1]["transport_protocol_type"], "v1") |
| 130 | + check_node_connections(node=node0, num_in=1, num_out=0) |
| 131 | + |
| 132 | + |
| 133 | +if __name__ == '__main__': |
| 134 | + P2PEncrypted().main() |
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