1 files changed, 188 insertions, 0 deletions
diff --git a/test/functional/bipdersig-p2p.py b/test/functional/bipdersig-p2p.py
new file mode 100755
index 0000000000..22bd39fbe5
--- /dev/null
+++ b/test/functional/bipdersig-p2p.py
@@ -0,0 +1,188 @@
+#!/usr/bin/env python3
+# Copyright (c) 2015-2016 The Bitcoin Core developers
+# Distributed under the MIT software license, see the accompanying
+# file COPYING or http://www.opensource.org/licenses/mit-license.php.
+"""Test BIP66 (DER SIG).
+
+Connect to a single node.
+Mine 2 (version 2) blocks (save the coinbases for later).
+Generate 98 more version 2 blocks, verify the node accepts.
+Mine 749 version 3 blocks, verify the node accepts.
+Check that the new DERSIG rules are not enforced on the 750th version 3 block.
+Check that the new DERSIG rules are enforced on the 751st version 3 block.
+Mine 199 new version blocks.
+Mine 1 old-version block.
+Mine 1 new version block.
+Mine 1 old version block, see that the node rejects.
+"""
+
+from test_framework.test_framework import ComparisonTestFramework
+from test_framework.util import *
+from test_framework.mininode import CTransaction, NetworkThread
+from test_framework.blocktools import create_coinbase, create_block
+from test_framework.comptool import TestInstance, TestManager
+from test_framework.script import CScript
+from io import BytesIO
+import time
+
+# A canonical signature consists of: 
+# <30> <total len> <02> <len R> <R> <02> <len S> <S> <hashtype>
+def unDERify(tx):
+    """
+    Make the signature in vin 0 of a tx non-DER-compliant,
+    by adding padding after the S-value.
+    """
+    scriptSig = CScript(tx.vin[0].scriptSig)
+    newscript = []
+    for i in scriptSig:
+        if (len(newscript) == 0):
+            newscript.append(i[0:-1] + b'\0' + i[-1:])
+        else:
+            newscript.append(i)
+    tx.vin[0].scriptSig = CScript(newscript)
+            
+class BIP66Test(ComparisonTestFramework):
+
+    def __init__(self):
+        super().__init__()
+        self.num_nodes = 1
+
+    def setup_network(self):
+        # Must set the blockversion for this test
+        self.nodes = start_nodes(self.num_nodes, self.options.tmpdir,
+                                 extra_args=[['-whitelist=127.0.0.1', '-blockversion=2']],
+                                 binary=[self.options.testbinary])
+
+    def run_test(self):
+        test = TestManager(self, self.options.tmpdir)
+        test.add_all_connections(self.nodes)
+        NetworkThread().start() # Start up network handling in another thread
+        test.run()
+
+    def create_transaction(self, node, coinbase, to_address, amount):
+        from_txid = node.getblock(coinbase)['tx'][0]
+        inputs = [{ "txid" : from_txid, "vout" : 0}]
+        outputs = { to_address : amount }
+        rawtx = node.createrawtransaction(inputs, outputs)
+        signresult = node.signrawtransaction(rawtx)
+        tx = CTransaction()
+        f = BytesIO(hex_str_to_bytes(signresult['hex']))
+        tx.deserialize(f)
+        return tx
+
+    def get_tests(self):
+
+        self.coinbase_blocks = self.nodes[0].generate(2)
+        height = 3  # height of the next block to build
+        self.tip = int("0x" + self.nodes[0].getbestblockhash(), 0)
+        self.nodeaddress = self.nodes[0].getnewaddress()
+        self.last_block_time = int(time.time())
+
+        ''' 298 more version 2 blocks '''
+        test_blocks = []
+        for i in range(298):
+            block = create_block(self.tip, create_coinbase(height), self.last_block_time + 1)
+            block.nVersion = 2
+            block.rehash()
+            block.solve()
+            test_blocks.append([block, True])
+            self.last_block_time += 1
+            self.tip = block.sha256
+            height += 1
+        yield TestInstance(test_blocks, sync_every_block=False)
+
+        ''' Mine 749 version 3 blocks '''
+        test_blocks = []
+        for i in range(749):
+            block = create_block(self.tip, create_coinbase(height), self.last_block_time + 1)
+            block.nVersion = 3
+            block.rehash()
+            block.solve()
+            test_blocks.append([block, True])
+            self.last_block_time += 1
+            self.tip = block.sha256
+            height += 1
+        yield TestInstance(test_blocks, sync_every_block=False)
+
+        ''' 
+        Check that the new DERSIG rules are not enforced in the 750th
+        version 3 block.
+        '''
+        spendtx = self.create_transaction(self.nodes[0],
+                self.coinbase_blocks[0], self.nodeaddress, 1.0)
+        unDERify(spendtx)
+        spendtx.rehash()
+
+        block = create_block(self.tip, create_coinbase(height), self.last_block_time + 1)
+        block.nVersion = 3
+        block.vtx.append(spendtx)
+        block.hashMerkleRoot = block.calc_merkle_root()
+        block.rehash()
+        block.solve()
+
+        self.last_block_time += 1
+        self.tip = block.sha256
+        height += 1
+        yield TestInstance([[block, True]])       
+
+        ''' Mine 199 new version blocks on last valid tip '''
+        test_blocks = []
+        for i in range(199):
+            block = create_block(self.tip, create_coinbase(height), self.last_block_time + 1)
+            block.nVersion = 3
+            block.rehash()
+            block.solve()
+            test_blocks.append([block, True])
+            self.last_block_time += 1
+            self.tip = block.sha256
+            height += 1
+        yield TestInstance(test_blocks, sync_every_block=False)
+
+        ''' Mine 1 old version block '''
+        block = create_block(self.tip, create_coinbase(height), self.last_block_time + 1)
+        block.nVersion = 2
+        block.rehash()
+        block.solve()
+        self.last_block_time += 1
+        self.tip = block.sha256
+        height += 1
+        yield TestInstance([[block, True]])
+
+        ''' Mine 1 new version block '''
+        block = create_block(self.tip, create_coinbase(height), self.last_block_time + 1)
+        block.nVersion = 3
+        block.rehash()
+        block.solve()
+        self.last_block_time += 1
+        self.tip = block.sha256
+        height += 1
+        yield TestInstance([[block, True]])
+
+        ''' 
+        Check that the new DERSIG rules are enforced in the 951st version 3
+        block.
+        '''
+        spendtx = self.create_transaction(self.nodes[0],
+                self.coinbase_blocks[1], self.nodeaddress, 1.0)
+        unDERify(spendtx)
+        spendtx.rehash()
+
+        block = create_block(self.tip, create_coinbase(height), self.last_block_time + 1)
+        block.nVersion = 3
+        block.vtx.append(spendtx)
+        block.hashMerkleRoot = block.calc_merkle_root()
+        block.rehash()
+        block.solve()
+        self.last_block_time += 1
+        yield TestInstance([[block, False]])
+
+        ''' Mine 1 old version block, should be invalid '''
+        block = create_block(self.tip, create_coinbase(height), self.last_block_time + 1)
+        block.nVersion = 2
+        block.rehash()
+        block.solve()
+        self.last_block_time += 1
+        yield TestInstance([[block, False]])
+
+if __name__ == '__main__':
+    BIP66Test().main()