Merge pull request #1209 from rnicoll/1.8.3-bip66
Apply BIP 66 changes to 1.8.3 client
This commit is contained in:
Max K.
commit
e6e34e13d9
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@ -33,6 +33,7 @@ static const int BLOCK_VERSION_DEFAULT = (1 << 0);
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static const int BLOCK_VERSION_AUXPOW = (1 << 8);
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static const int BLOCK_VERSION_CHAIN_START = (1 << 16);
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static const int BLOCK_VERSION_CHAIN_END = (1 << 30);
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static const int BLOCK_VERSION_BASE_MASK = 0x000000ff;
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// DogeCoin aux chain ID = 0x0062 (98)
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static const int AUXPOW_CHAIN_ID = 0x0062;
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@ -364,7 +365,7 @@ class CBlockHeader
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{
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public:
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// header
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static const int CURRENT_VERSION=2;
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static const int CURRENT_VERSION=3;
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int nVersion;
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uint256 hashPrevBlock;
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uint256 hashMerkleRoot;
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@ -396,6 +397,12 @@ public:
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return nVersion / BLOCK_VERSION_CHAIN_START;
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}
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// base block version without auxpow chain
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int GetBaseVersion() const
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{
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return nVersion & BLOCK_VERSION_BASE_MASK;
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}
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void SetAuxPow(CAuxPow* pow);
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void SetNull()
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34
src/main.cpp
34
src/main.cpp
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@ -1966,6 +1966,12 @@ bool ConnectBlock(CBlock& block, CValidationState& state, CBlockIndex* pindex, C
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unsigned int flags = SCRIPT_VERIFY_NOCACHE |
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(fStrictPayToScriptHash ? SCRIPT_VERIFY_P2SH : SCRIPT_VERIFY_NONE);
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if (block.GetBaseVersion() >= 3 &&
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((!TestNet() && CBlockIndex::IsSuperMajority(3, pindex->pprev, 1500, 2000)) ||
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(TestNet() && CBlockIndex::IsSuperMajority(3, pindex->pprev, 501, 1000)))) {
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flags |= SCRIPT_VERIFY_DERSIG;
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}
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CBlockUndo blockundo;
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CCheckQueueControl<CScriptCheck> control(fScriptChecks && nScriptCheckThreads ? &scriptcheckqueue : NULL);
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@ -2131,7 +2137,7 @@ void static UpdateTip(CBlockIndex *pindexNew) {
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const CBlockIndex* pindex = chainActive.Tip();
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for (int i = 0; i < 100 && pindex != NULL; i++)
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{
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if (pindex->nVersion > CBlock::CURRENT_VERSION && !IsAuxPowVersion(pindex->nVersion))
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if (pindex->GetBaseVersion() > CBlock::CURRENT_VERSION)
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++nUpgraded;
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pindex = pindex->pprev;
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}
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@ -2706,15 +2712,13 @@ bool AcceptBlockHeader(CBlockHeader& block, CValidationState& state, CBlockIndex
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if (pcheckpoint && nHeight < pcheckpoint->nHeight)
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return state.DoS(100, error("AcceptBlock() : forked chain older than last checkpoint (height %d)", nHeight));
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// Reject block.nVersion=1 blocks when 95% (75% on testnet) of the network has upgraded:
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if (block.nVersion < 2)
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{
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if ((!TestNet() && CBlockIndex::IsSuperMajority(2, pindexPrev, 950, 1000)) ||
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(TestNet() && CBlockIndex::IsSuperMajority(2, pindexPrev, 75, 100)))
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{
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return state.Invalid(error("AcceptBlock() : rejected nVersion=1 block"),
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// Reject block.nVersion<3 blocks when 95% (75% on testnet) of the network has upgraded
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// Dogecoin: reject v2 and v1 blocks at the same time, only check once
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if (block.GetBaseVersion() < 3) {
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if ((!TestNet() && CBlockIndex::IsSuperMajority(3, pindexPrev, 1900, 2000)) ||
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(TestNet() && CBlockIndex::IsSuperMajority(3, pindexPrev, 750, 1000)))
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return state.Invalid(error("AcceptBlock() : rejected nVersion<3 block"),
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REJECT_OBSOLETE, "bad-version");
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}
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}
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}
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@ -2756,11 +2760,13 @@ bool AcceptBlock(CBlock& block, CValidationState& state, CBlockIndex** ppindex,
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}
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// Enforce block.nVersion=2 rule that the coinbase starts with serialized block height
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if (block.nVersion >= 2)
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// Dogecoin: reject ONLY if block.nVersion=3 has a supermajority because CBlockIndex::IsSuperMajority
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// was hard-disabled until now
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if (block.GetBaseVersion() >= 2)
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{
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// if 750 of the last 1,000 blocks are version 2 or greater (51/100 if testnet):
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if ((!TestNet() && CBlockIndex::IsSuperMajority(2, pindex->pprev, 750, 1000)) ||
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(TestNet() && CBlockIndex::IsSuperMajority(2, pindex->pprev, 51, 100)))
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if ((!TestNet() && CBlockIndex::IsSuperMajority(3, pindex->pprev, 1500, 2000)) ||
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(TestNet() && CBlockIndex::IsSuperMajority(3, pindex->pprev, 501, 1000)))
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{
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CScript expect = CScript() << nHeight;
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if (block.vtx[0].vin[0].scriptSig.size() < expect.size() ||
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@ -2804,13 +2810,11 @@ bool AcceptBlock(CBlock& block, CValidationState& state, CBlockIndex** ppindex,
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bool CBlockIndex::IsSuperMajority(int minVersion, const CBlockIndex* pstart, unsigned int nRequired, unsigned int nToCheck)
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{
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// Dogecoin: temporarily disable v2 block lockin until we are ready for v2 transition
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return false;
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unsigned int nFound = 0;
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for (unsigned int i = 0; i < nToCheck && nFound < nRequired && pstart != NULL; i++)
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{
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if (pstart->nVersion >= minVersion)
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if (pstart->GetBaseVersion() >= minVersion)
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++nFound;
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pstart = pstart->pprev;
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}
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@ -928,6 +928,12 @@ public:
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}
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return false;
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}
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// base block version without auxpow chain
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int GetBaseVersion() const
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{
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return nVersion & BLOCK_VERSION_BASE_MASK;
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}
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};
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@ -297,6 +297,86 @@ bool IsCanonicalSignature(const valtype &vchSig, unsigned int flags) {
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return true;
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}
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// BIP 66 defined signature encoding check. This largely overlaps with
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// IsCanonicalSignature above, but lacks hashtype constraints, and uses the
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// exact implementation code from BIP 66.
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bool static IsValidSignatureEncoding(const std::vector<unsigned char> &sig) {
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// Format: 0x30 [total-length] 0x02 [R-length] [R] 0x02 [S-length] [S] [sighash]
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// * total-length: 1-byte length descriptor of everything that follows,
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// excluding the sighash byte.
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// * R-length: 1-byte length descriptor of the R value that follows.
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// * R: arbitrary-length big-endian encoded R value. It must use the shortest
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// possible encoding for a positive integers (which means no null bytes at
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// the start, except a single one when the next byte has its highest bit set).
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// * S-length: 1-byte length descriptor of the S value that follows.
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// * S: arbitrary-length big-endian encoded S value. The same rules apply.
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// * sighash: 1-byte value indicating what data is hashed (not part of the DER
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// signature)
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// Minimum and maximum size constraints.
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if (sig.size() < 9) return false;
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if (sig.size() > 73) return false;
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// A signature is of type 0x30 (compound).
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if (sig[0] != 0x30) return false;
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// Make sure the length covers the entire signature.
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if (sig[1] != sig.size() - 3) return false;
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// Extract the length of the R element.
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unsigned int lenR = sig[3];
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// Make sure the length of the S element is still inside the signature.
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if (5 + lenR >= sig.size()) return false;
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// Extract the length of the S element.
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unsigned int lenS = sig[5 + lenR];
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// Verify that the length of the signature matches the sum of the length
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// of the elements.
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if ((size_t)(lenR + lenS + 7) != sig.size()) return false;
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// Check whether the R element is an integer.
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if (sig[2] != 0x02) return false;
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// Zero-length integers are not allowed for R.
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if (lenR == 0) return false;
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// Negative numbers are not allowed for R.
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if (sig[4] & 0x80) return false;
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// Null bytes at the start of R are not allowed, unless R would
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// otherwise be interpreted as a negative number.
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if (lenR > 1 && (sig[4] == 0x00) && !(sig[5] & 0x80)) return false;
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// Check whether the S element is an integer.
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if (sig[lenR + 4] != 0x02) return false;
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// Zero-length integers are not allowed for S.
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if (lenS == 0) return false;
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// Negative numbers are not allowed for S.
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if (sig[lenR + 6] & 0x80) return false;
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// Null bytes at the start of S are not allowed, unless S would otherwise be
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// interpreted as a negative number.
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if (lenS > 1 && (sig[lenR + 6] == 0x00) && !(sig[lenR + 7] & 0x80)) return false;
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return true;
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}
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bool static CheckSignatureEncoding(const valtype &vchSig, unsigned int flags) {
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// Empty signature. Not strictly DER encoded, but allowed to provide a
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// compact way to provide an invalid signature for use with CHECK(MULTI)SIG
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if (vchSig.size() == 0) {
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return true;
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}
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if ((flags & SCRIPT_VERIFY_DERSIG) != 0 && !IsValidSignatureEncoding(vchSig)) {
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return false;
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}
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return true;
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}
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bool EvalScript(vector<vector<unsigned char> >& stack, const CScript& script, const CTransaction& txTo, unsigned int nIn, unsigned int flags, int nHashType)
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{
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CScript::const_iterator pc = script.begin();
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@ -849,6 +929,10 @@ bool EvalScript(vector<vector<unsigned char> >& stack, const CScript& script, co
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// Drop the signature, since there's no way for a signature to sign itself
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scriptCode.FindAndDelete(CScript(vchSig));
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if (!CheckSignatureEncoding(vchSig, flags)) {
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return false;
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}
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bool fSuccess = IsCanonicalSignature(vchSig, flags) && IsCanonicalPubKey(vchPubKey, flags) &&
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CheckSig(vchSig, vchPubKey, scriptCode, txTo, nIn, nHashType, flags);
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@ -909,6 +993,10 @@ bool EvalScript(vector<vector<unsigned char> >& stack, const CScript& script, co
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valtype& vchSig = stacktop(-isig);
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valtype& vchPubKey = stacktop(-ikey);
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if (!CheckSignatureEncoding(vchSig, flags)) {
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return false;
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}
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// Check signature
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bool fOk = IsCanonicalSignature(vchSig, flags) && IsCanonicalPubKey(vchPubKey, flags) &&
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CheckSig(vchSig, vchPubKey, scriptCode, txTo, nIn, nHashType, flags);
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@ -190,7 +190,8 @@ enum
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SCRIPT_VERIFY_STRICTENC = (1U << 1), // enforce strict conformance to DER and SEC2 for signatures and pubkeys
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SCRIPT_VERIFY_LOW_S = (1U << 2), // enforce low S values (<n/2) in signatures (depends on STRICTENC)
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SCRIPT_VERIFY_NOCACHE = (1U << 3), // do not store results in signature cache (but do query it)
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SCRIPT_VERIFY_NULLDUMMY = (1U << 4), // verify dummy stack item consumed by CHECKMULTISIG is of zero-length
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SCRIPT_VERIFY_DERSIG = (1U << 4), // enforce signature encodings as defined by BIP 66 (which is a softfork, while STRICTENC is not)
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SCRIPT_VERIFY_NULLDUMMY = (1U << 5), // verify dummy stack item consumed by CHECKMULTISIG is of zero-length
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};
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// Mandatory script verification flags that all new blocks must comply with for
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@ -208,6 +209,7 @@ static const unsigned int MANDATORY_SCRIPT_VERIFY_FLAGS = SCRIPT_VERIFY_P2SH;
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static const unsigned int STANDARD_SCRIPT_VERIFY_FLAGS = MANDATORY_SCRIPT_VERIFY_FLAGS |
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SCRIPT_VERIFY_STRICTENC |
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SCRIPT_VERIFY_NULLDUMMY |
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SCRIPT_VERIFY_DERSIG |
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SCRIPT_VERIFY_LOW_S;
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// For convenience, standard but not mandatory verify flags.
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@ -354,5 +354,47 @@
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["NOP1 0x01 1", "HASH160 0x14 0xda1745e9b549bd0bfa1a569971c77eba30cd5a4b EQUAL"],
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["0 0x01 0x50", "HASH160 0x14 0xece424a6bb6ddf4db592c0faed60685047a361b1 EQUAL", "OP_RESERVED in P2SH should fail"],
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["0 0x01 VER", "HASH160 0x14 0x0f4d7845db968f2a81b530b6f3c1d6246d4c7e01 EQUAL", "OP_VER in P2SH should fail"]
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["0 0x01 VER", "HASH160 0x14 0x0f4d7845db968f2a81b530b6f3c1d6246d4c7e01 EQUAL", "OP_VER in P2SH should fail"],
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["0x4a 0x0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000", "0 CHECKSIG NOT", "DERSIG", "Overly long signature is incorrectly encoded for DERSIG"],
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["0x25 0x30220220000000000000000000000000000000000000000000000000000000000000000000", "0 CHECKSIG NOT", "DERSIG", "Missing S is incorrectly encoded for DERSIG"],
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["0x27 0x3024021077777777777777777777777777777777020a7777777777777777777777777777777701", "0 CHECKSIG NOT", "DERSIG", "S with invalid S length is incorrectly encoded for DERSIG"],
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["0x27 0x302403107777777777777777777777777777777702107777777777777777777777777777777701", "0 CHECKSIG NOT", "DERSIG", "Non-integer R is incorrectly encoded for DERSIG"],
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["0x27 0x302402107777777777777777777777777777777703107777777777777777777777777777777701", "0 CHECKSIG NOT", "DERSIG", "Non-integer S is incorrectly encoded for DERSIG"],
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["0x17 0x3014020002107777777777777777777777777777777701", "0 CHECKSIG NOT", "DERSIG", "Zero-length R is incorrectly encoded for DERSIG"],
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["0x17 0x3014021077777777777777777777777777777777020001", "0 CHECKSIG NOT", "DERSIG", "Zero-length S is incorrectly encoded for DERSIG"],
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["0x27 0x302402107777777777777777777777777777777702108777777777777777777777777777777701", "0 CHECKSIG NOT", "DERSIG", "Negative S is incorrectly encoded for DERSIG"],
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[
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"0x47 0x30440220003040725f724b0e2142fc44ac71f6e13161f6410aeb6dee477952ede3b6a6ca022041ff4940ee3d88116ad281d7cc556e1f2c9427d82290bd7974a25addbcd5bede01",
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"0x21 0x03363d90d447b00c9c99ceac05b6262ee053441c7e55552ffe526bad8f83ff4640 CHECKSIG NOT",
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"DERSIG",
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"P2PK NOT with bad sig with too much R padding"
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],
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[
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"0x47 0x30440220003040725f724a0e2142fc44ac71f6e13161f6410aeb6dee477952ede3b6a6ca022041ff4940ee3d88116ad281d7cc556e1f2c9427d82290bd7974a25addbcd5bede01",
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"0x21 0x03363d90d447b00c9c99ceac05b6262ee053441c7e55552ffe526bad8f83ff4640 CHECKSIG NOT",
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"DERSIG",
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"P2PK NOT with too much R padding"
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],
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[
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"0x47 0x304402208e43c0b91f7c1e5bc58e41c8185f8a6086e111b0090187968a86f2822462d3c902200a58f4076b1133b18ff1dc83ee51676e44c60cc608d9534e0df5ace0424fc0be01",
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"0x21 0x038282263212c609d9ea2a6e3e172de238d8c39cabd5ac1ca10646e23fd5f51508 CHECKSIG NOT",
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"DERSIG",
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"BIP66 example 2, with DERSIG"
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],
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[
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"1",
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"0x21 0x038282263212c609d9ea2a6e3e172de238d8c39cabd5ac1ca10646e23fd5f51508 CHECKSIG NOT",
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"DERSIG",
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"BIP66 example 6, with DERSIG"
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],
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[
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"0 0 0x47 0x30440220afa76a8f60622f813b05711f051c6c3407e32d1b1b70b0576c1f01b54e4c05c702200d58e9df044fd1845cabfbeef6e624ba0401daf7d7e084736f9ff601c3783bf501",
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"2 0x21 0x038282263212c609d9ea2a6e3e172de238d8c39cabd5ac1ca10646e23fd5f51508 0x21 0x03363d90d447b00c9c99ceac05b6262ee053441c7e55552ffe526bad8f83ff4640 2 CHECKMULTISIG NOT",
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"DERSIG",
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"BIP66 example 10, with DERSIG"
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],
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["0x00", "'00' EQUAL", "Basic OP_0 execution"]
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]
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@ -500,5 +500,59 @@
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["0x4c 0x40 0x42424242424242424242424242424242424242424242424242424242424242424242424242424242424242424242424242424242424242424242424242424242",
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"0x4d 0x4000 0x42424242424242424242424242424242424242424242424242424242424242424242424242424242424242424242424242424242424242424242424242424242 EQUAL",
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"Basic PUSHDATA1 signedness check"]
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"Basic PUSHDATA1 signedness check"],
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["0x4a 0x0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000", "0 CHECKSIG NOT", "", "Overly long signature is correctly encoded"],
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["0x25 0x30220220000000000000000000000000000000000000000000000000000000000000000000", "0 CHECKSIG NOT", "", "Missing S is correctly encoded"],
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["0x27 0x3024021077777777777777777777777777777777020a7777777777777777777777777777777701", "0 CHECKSIG NOT", "", "S with invalid S length is correctly encoded"],
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["0x27 0x302403107777777777777777777777777777777702107777777777777777777777777777777701", "0 CHECKSIG NOT", "", "Non-integer R is correctly encoded"],
|
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["0x27 0x302402107777777777777777777777777777777703107777777777777777777777777777777701", "0 CHECKSIG NOT", "", "Non-integer S is correctly encoded"],
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["0x17 0x3014020002107777777777777777777777777777777701", "0 CHECKSIG NOT", "", "Zero-length R is correctly encoded"],
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["0x17 0x3014021077777777777777777777777777777777020001", "0 CHECKSIG NOT", "", "Zero-length S is correctly encoded"],
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["0x27 0x302402107777777777777777777777777777777702108777777777777777777777777777777701", "0 CHECKSIG NOT", "", "Negative S is correctly encoded"],
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[
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"0x47 0x30440220003040725f724b0e2142fc44ac71f6e13161f6410aeb6dee477952ede3b6a6ca022041ff4940ee3d88116ad281d7cc556e1f2c9427d82290bd7974a25addbcd5bede01",
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"0x21 0x03363d90d447b00c9c99ceac05b6262ee053441c7e55552ffe526bad8f83ff4640 CHECKSIG NOT",
|
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"",
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"P2PK NOT with bad sig with too much R padding but no DERSIG"
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],
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[
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"0",
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"0x21 0x038282263212c609d9ea2a6e3e172de238d8c39cabd5ac1ca10646e23fd5f51508 CHECKSIG NOT",
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"",
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||||
"BIP66 example 4, without DERSIG"
|
||||
],
|
||||
[
|
||||
"0",
|
||||
"0x21 0x038282263212c609d9ea2a6e3e172de238d8c39cabd5ac1ca10646e23fd5f51508 CHECKSIG NOT",
|
||||
"DERSIG",
|
||||
"BIP66 example 4, with DERSIG"
|
||||
],
|
||||
[
|
||||
"1",
|
||||
"0x21 0x038282263212c609d9ea2a6e3e172de238d8c39cabd5ac1ca10646e23fd5f51508 CHECKSIG NOT",
|
||||
"",
|
||||
"BIP66 example 6, without DERSIG"
|
||||
],
|
||||
[
|
||||
"0 0 0x47 0x30440220afa76a8f60622f813b05711f051c6c3407e32d1b1b70b0576c1f01b54e4c05c702200d58e9df044fd1845cabfbeef6e624ba0401daf7d7e084736f9ff601c3783bf501",
|
||||
"2 0x21 0x038282263212c609d9ea2a6e3e172de238d8c39cabd5ac1ca10646e23fd5f51508 0x21 0x03363d90d447b00c9c99ceac05b6262ee053441c7e55552ffe526bad8f83ff4640 2 CHECKMULTISIG NOT",
|
||||
"",
|
||||
"BIP66 example 10, without DERSIG"
|
||||
],
|
||||
[
|
||||
"0 0x47 0x30440220f00a77260d34ec2f0c59621dc710f58169d0ca06df1a88cd4b1f1b97bd46991b02201ee220c7e04f26aed03f94aa97fb09ca5627163bf4ba07e6979972ec737db22601 0",
|
||||
"2 0x21 0x038282263212c609d9ea2a6e3e172de238d8c39cabd5ac1ca10646e23fd5f51508 0x21 0x03363d90d447b00c9c99ceac05b6262ee053441c7e55552ffe526bad8f83ff4640 2 CHECKMULTISIG NOT",
|
||||
"",
|
||||
"BIP66 example 12, without DERSIG"
|
||||
],
|
||||
[
|
||||
"0 0x47 0x30440220f00a77260d34ec2f0c59621dc710f58169d0ca06df1a88cd4b1f1b97bd46991b02201ee220c7e04f26aed03f94aa97fb09ca5627163bf4ba07e6979972ec737db22601 0",
|
||||
"2 0x21 0x038282263212c609d9ea2a6e3e172de238d8c39cabd5ac1ca10646e23fd5f51508 0x21 0x03363d90d447b00c9c99ceac05b6262ee053441c7e55552ffe526bad8f83ff4640 2 CHECKMULTISIG NOT",
|
||||
"DERSIG",
|
||||
"BIP66 example 12, with DERSIG"
|
||||
],
|
||||
|
||||
["0x00", "SIZE 0 EQUAL", "Basic OP_0 execution"]
|
||||
]
|
||||
|
|
|
|||
|
|
@ -144,8 +144,13 @@ BOOST_AUTO_TEST_CASE(script_valid)
|
|||
string scriptPubKeyString = test[1].get_str();
|
||||
CScript scriptPubKey = ParseScript(scriptPubKeyString);
|
||||
|
||||
int flagsNow = flags;
|
||||
if (test.size() > 3 && ("," + test[2].get_str() + ",").find(",DERSIG,") != string::npos) {
|
||||
flagsNow |= SCRIPT_VERIFY_DERSIG;
|
||||
}
|
||||
|
||||
CTransaction tx;
|
||||
BOOST_CHECK_MESSAGE(VerifyScript(scriptSig, scriptPubKey, tx, 0, flags, SIGHASH_NONE), strTest);
|
||||
BOOST_CHECK_MESSAGE(VerifyScript(scriptSig, scriptPubKey, tx, 0, flagsNow, SIGHASH_NONE), strTest);
|
||||
}
|
||||
}
|
||||
|
||||
|
|
@ -168,8 +173,13 @@ BOOST_AUTO_TEST_CASE(script_invalid)
|
|||
string scriptPubKeyString = test[1].get_str();
|
||||
CScript scriptPubKey = ParseScript(scriptPubKeyString);
|
||||
|
||||
int flagsNow = flags;
|
||||
if (test.size() > 3 && ("," + test[2].get_str() + ",").find(",DERSIG,") != string::npos) {
|
||||
flagsNow |= SCRIPT_VERIFY_DERSIG;
|
||||
}
|
||||
|
||||
CTransaction tx;
|
||||
BOOST_CHECK_MESSAGE(!VerifyScript(scriptSig, scriptPubKey, tx, 0, flags, SIGHASH_NONE), strTest);
|
||||
BOOST_CHECK_MESSAGE(!VerifyScript(scriptSig, scriptPubKey, tx, 0, flagsNow, SIGHASH_NONE), strTest);
|
||||
}
|
||||
}
|
||||
|
||||
|
|
|
|||
Loading…
Reference in a new issue