Initial commit

Successfully building on Ubuntu + Windows.

1 files changed, 303 insertions, 0 deletions

diff --git a/src/test/DoS_tests.cpp b/src/test/DoS_tests.cpp
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+++ b/src/test/DoS_tests.cpp
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+//
+// Unit tests for denial-of-service detection/prevention code
+//
+#include <algorithm>
+
+#include <boost/assign/list_of.hpp> // for 'map_list_of()'
+#include <boost/date_time/posix_time/posix_time_types.hpp>
+#include <boost/test/unit_test.hpp>
+#include <boost/foreach.hpp>
+
+#include "main.h"
+#include "wallet.h"
+#include "net.h"
+#include "util.h"
+
+#include <stdint.h>
+
+// Tests this internal-to-main.cpp method:
+extern bool AddOrphanTx(const CTransaction& tx);
+extern unsigned int LimitOrphanTxSize(unsigned int nMaxOrphans);
+extern std::map<uint256, CTransaction> mapOrphanTransactions;
+extern std::map<uint256, std::set<uint256> > mapOrphanTransactionsByPrev;
+
+CService ip(uint32_t i)
+{
+    struct in_addr s;
+    s.s_addr = i;
+    return CService(CNetAddr(s), GetDefaultPort());
+}
+
+BOOST_AUTO_TEST_SUITE(DoS_tests)
+
+BOOST_AUTO_TEST_CASE(DoS_banning)
+{
+    CNode::ClearBanned();
+    CAddress addr1(ip(0xa0b0c001));
+    CNode dummyNode1(INVALID_SOCKET, addr1, "", true);
+    dummyNode1.Misbehaving(100); // Should get banned
+    BOOST_CHECK(CNode::IsBanned(addr1));
+    BOOST_CHECK(!CNode::IsBanned(ip(0xa0b0c001|0x0000ff00))); // Different IP, not banned
+
+    CAddress addr2(ip(0xa0b0c002));
+    CNode dummyNode2(INVALID_SOCKET, addr2, "", true);
+    dummyNode2.Misbehaving(50);
+    BOOST_CHECK(!CNode::IsBanned(addr2)); // 2 not banned yet...
+    BOOST_CHECK(CNode::IsBanned(addr1));  // ... but 1 still should be
+    dummyNode2.Misbehaving(50);
+    BOOST_CHECK(CNode::IsBanned(addr2));
+}
+
+BOOST_AUTO_TEST_CASE(DoS_banscore)
+{
+    CNode::ClearBanned();
+    mapArgs["-banscore"] = "111"; // because 11 is my favorite number
+    CAddress addr1(ip(0xa0b0c001));
+    CNode dummyNode1(INVALID_SOCKET, addr1, "", true);
+    dummyNode1.Misbehaving(100);
+    BOOST_CHECK(!CNode::IsBanned(addr1));
+    dummyNode1.Misbehaving(10);
+    BOOST_CHECK(!CNode::IsBanned(addr1));
+    dummyNode1.Misbehaving(1);
+    BOOST_CHECK(CNode::IsBanned(addr1));
+    mapArgs.erase("-banscore");
+}
+
+BOOST_AUTO_TEST_CASE(DoS_bantime)
+{
+    CNode::ClearBanned();
+    int64 nStartTime = GetTime();
+    SetMockTime(nStartTime); // Overrides future calls to GetTime()
+
+    CAddress addr(ip(0xa0b0c001));
+    CNode dummyNode(INVALID_SOCKET, addr, "", true);
+
+    dummyNode.Misbehaving(100);
+    BOOST_CHECK(CNode::IsBanned(addr));
+
+    SetMockTime(nStartTime+60*60);
+    BOOST_CHECK(CNode::IsBanned(addr));
+
+    SetMockTime(nStartTime+60*60*24+1);
+    BOOST_CHECK(!CNode::IsBanned(addr));
+}
+
+static bool CheckNBits(unsigned int nbits1, int64 time1, unsigned int nbits2, int64 time2)\
+{
+    if (time1 > time2)
+        return CheckNBits(nbits2, time2, nbits1, time1);
+    int64 deltaTime = time2-time1;
+
+    CBigNum required;
+    required.SetCompact(ComputeMinWork(nbits1, deltaTime));
+    CBigNum have;
+    have.SetCompact(nbits2);
+    return (have <= required);
+}
+
+BOOST_AUTO_TEST_CASE(DoS_checknbits)
+{
+    using namespace boost::assign; // for 'map_list_of()'
+
+    // Timestamps,nBits from the bitcoin block chain.
+    // These are the block-chain checkpoint blocks
+    typedef std::map<int64, unsigned int> BlockData;
+    BlockData chainData =
+        map_list_of(1239852051,486604799)(1262749024,486594666)
+        (1279305360,469854461)(1280200847,469830746)(1281678674,469809688)
+        (1296207707,453179945)(1302624061,453036989)(1309640330,437004818)
+        (1313172719,436789733);
+
+    // Make sure CheckNBits considers every combination of block-chain-lock-in-points
+    // "sane":
+    BOOST_FOREACH(const BlockData::value_type& i, chainData)
+    {
+        BOOST_FOREACH(const BlockData::value_type& j, chainData)
+        {
+            BOOST_CHECK(CheckNBits(i.second, i.first, j.second, j.first));
+        }
+    }
+
+    // Test a couple of insane combinations:
+    BlockData::value_type firstcheck = *(chainData.begin());
+    BlockData::value_type lastcheck = *(chainData.rbegin());
+
+    // First checkpoint difficulty at or a while after the last checkpoint time should fail when
+    // compared to last checkpoint
+    BOOST_CHECK(!CheckNBits(firstcheck.second, lastcheck.first+60*10, lastcheck.second, lastcheck.first));
+    BOOST_CHECK(!CheckNBits(firstcheck.second, lastcheck.first+60*60*24*14, lastcheck.second, lastcheck.first));
+
+    // ... but OK if enough time passed for difficulty to adjust downward:
+    BOOST_CHECK(CheckNBits(firstcheck.second, lastcheck.first+60*60*24*365*4, lastcheck.second, lastcheck.first));
+}
+
+CTransaction RandomOrphan()
+{
+    std::map<uint256, CTransaction>::iterator it;
+    it = mapOrphanTransactions.lower_bound(GetRandHash());
+    if (it == mapOrphanTransactions.end())
+        it = mapOrphanTransactions.begin();
+    return it->second;
+}
+
+BOOST_AUTO_TEST_CASE(DoS_mapOrphans)
+{
+    CKey key;
+    key.MakeNewKey(true);
+    CBasicKeyStore keystore;
+    keystore.AddKey(key);
+
+    // 50 orphan transactions:
+    for (int i = 0; i < 50; i++)
+    {
+        CTransaction tx;
+        tx.vin.resize(1);
+        tx.vin[0].prevout.n = 0;
+        tx.vin[0].prevout.hash = GetRandHash();
+        tx.vin[0].scriptSig << OP_1;
+        tx.vout.resize(1);
+        tx.vout[0].nValue = 1*CENT;
+        tx.vout[0].scriptPubKey.SetDestination(key.GetPubKey().GetID());
+
+        AddOrphanTx(tx);
+    }
+
+    // ... and 50 that depend on other orphans:
+    for (int i = 0; i < 50; i++)
+    {
+        CTransaction txPrev = RandomOrphan();
+
+        CTransaction tx;
+        tx.vin.resize(1);
+        tx.vin[0].prevout.n = 0;
+        tx.vin[0].prevout.hash = txPrev.GetHash();
+        tx.vout.resize(1);
+        tx.vout[0].nValue = 1*CENT;
+        tx.vout[0].scriptPubKey.SetDestination(key.GetPubKey().GetID());
+        SignSignature(keystore, txPrev, tx, 0);
+
+        AddOrphanTx(tx);
+    }
+
+    // This really-big orphan should be ignored:
+    for (int i = 0; i < 10; i++)
+    {
+        CTransaction txPrev = RandomOrphan();
+
+        CTransaction tx;
+        tx.vout.resize(1);
+        tx.vout[0].nValue = 1*CENT;
+        tx.vout[0].scriptPubKey.SetDestination(key.GetPubKey().GetID());
+        tx.vin.resize(500);
+        for (unsigned int j = 0; j < tx.vin.size(); j++)
+        {
+            tx.vin[j].prevout.n = j;
+            tx.vin[j].prevout.hash = txPrev.GetHash();
+        }
+        SignSignature(keystore, txPrev, tx, 0);
+        // Re-use same signature for other inputs
+        // (they don't have to be valid for this test)
+        for (unsigned int j = 1; j < tx.vin.size(); j++)
+            tx.vin[j].scriptSig = tx.vin[0].scriptSig;
+
+        BOOST_CHECK(!AddOrphanTx(tx));
+    }
+
+    // Test LimitOrphanTxSize() function:
+    LimitOrphanTxSize(40);
+    BOOST_CHECK(mapOrphanTransactions.size() <= 40);
+    LimitOrphanTxSize(10);
+    BOOST_CHECK(mapOrphanTransactions.size() <= 10);
+    LimitOrphanTxSize(0);
+    BOOST_CHECK(mapOrphanTransactions.empty());
+    BOOST_CHECK(mapOrphanTransactionsByPrev.empty());
+}
+
+BOOST_AUTO_TEST_CASE(DoS_checkSig)
+{
+    // Test signature caching code (see key.cpp Verify() methods)
+
+    CKey key;
+    key.MakeNewKey(true);
+    CBasicKeyStore keystore;
+    keystore.AddKey(key);
+    unsigned int flags = SCRIPT_VERIFY_P2SH | SCRIPT_VERIFY_STRICTENC;
+
+    // 100 orphan transactions:
+    static const int NPREV=100;
+    CTransaction orphans[NPREV];
+    for (int i = 0; i < NPREV; i++)
+    {
+        CTransaction& tx = orphans[i];
+        tx.vin.resize(1);
+        tx.vin[0].prevout.n = 0;
+        tx.vin[0].prevout.hash = GetRandHash();
+        tx.vin[0].scriptSig << OP_1;
+        tx.vout.resize(1);
+        tx.vout[0].nValue = 1*CENT;
+        tx.vout[0].scriptPubKey.SetDestination(key.GetPubKey().GetID());
+
+        AddOrphanTx(tx);
+    }
+
+    // Create a transaction that depends on orphans:
+    CTransaction tx;
+    tx.vout.resize(1);
+    tx.vout[0].nValue = 1*CENT;
+    tx.vout[0].scriptPubKey.SetDestination(key.GetPubKey().GetID());
+    tx.vin.resize(NPREV);
+    for (unsigned int j = 0; j < tx.vin.size(); j++)
+    {
+        tx.vin[j].prevout.n = 0;
+        tx.vin[j].prevout.hash = orphans[j].GetHash();
+    }
+    // Creating signatures primes the cache:
+    boost::posix_time::ptime mst1 = boost::posix_time::microsec_clock::local_time();
+    for (unsigned int j = 0; j < tx.vin.size(); j++)
+        BOOST_CHECK(SignSignature(keystore, orphans[j], tx, j));
+    boost::posix_time::ptime mst2 = boost::posix_time::microsec_clock::local_time();
+    boost::posix_time::time_duration msdiff = mst2 - mst1;
+    long nOneValidate = msdiff.total_milliseconds();
+    if (fDebug) printf("DoS_Checksig sign: %ld\n", nOneValidate);
+
+    // ... now validating repeatedly should be quick:
+    // 2.8GHz machine, -g build: Sign takes ~760ms,
+    // uncached Verify takes ~250ms, cached Verify takes ~50ms
+    // (for 100 single-signature inputs)
+    mst1 = boost::posix_time::microsec_clock::local_time();
+    for (unsigned int i = 0; i < 5; i++)
+        for (unsigned int j = 0; j < tx.vin.size(); j++)
+            BOOST_CHECK(VerifySignature(CCoins(orphans[j], MEMPOOL_HEIGHT), tx, j, flags, SIGHASH_ALL));
+    mst2 = boost::posix_time::microsec_clock::local_time();
+    msdiff = mst2 - mst1;
+    long nManyValidate = msdiff.total_milliseconds();
+    if (fDebug) printf("DoS_Checksig five: %ld\n", nManyValidate);
+
+    BOOST_CHECK_MESSAGE(nManyValidate < nOneValidate, "Signature cache timing failed");
+
+    // Empty a signature, validation should fail:
+    CScript save = tx.vin[0].scriptSig;
+    tx.vin[0].scriptSig = CScript();
+    BOOST_CHECK(!VerifySignature(CCoins(orphans[0], MEMPOOL_HEIGHT), tx, 0, flags, SIGHASH_ALL));
+    tx.vin[0].scriptSig = save;
+
+    // Swap signatures, validation should fail:
+    std::swap(tx.vin[0].scriptSig, tx.vin[1].scriptSig);
+    BOOST_CHECK(!VerifySignature(CCoins(orphans[0], MEMPOOL_HEIGHT), tx, 0, flags, SIGHASH_ALL));
+    BOOST_CHECK(!VerifySignature(CCoins(orphans[1], MEMPOOL_HEIGHT), tx, 1, flags, SIGHASH_ALL));
+    std::swap(tx.vin[0].scriptSig, tx.vin[1].scriptSig);
+
+    // Exercise -maxsigcachesize code:
+    mapArgs["-maxsigcachesize"] = "10";
+    // Generate a new, different signature for vin[0] to trigger cache clear:
+    CScript oldSig = tx.vin[0].scriptSig;
+    BOOST_CHECK(SignSignature(keystore, orphans[0], tx, 0));
+    BOOST_CHECK(tx.vin[0].scriptSig != oldSig);
+    for (unsigned int j = 0; j < tx.vin.size(); j++)
+        BOOST_CHECK(VerifySignature(CCoins(orphans[j], MEMPOOL_HEIGHT), tx, j, flags, SIGHASH_ALL));
+    mapArgs.erase("-maxsigcachesize");
+
+    LimitOrphanTxSize(0);
+}
+
+BOOST_AUTO_TEST_SUITE_END()