aboutsummaryrefslogtreecommitdiff
path: root/src/script/interpreter.cpp
diff options
context:
space:
mode:
Diffstat (limited to 'src/script/interpreter.cpp')
-rw-r--r--src/script/interpreter.cpp84
1 files changed, 72 insertions, 12 deletions
diff --git a/src/script/interpreter.cpp b/src/script/interpreter.cpp
index be649fca20..4deebd050d 100644
--- a/src/script/interpreter.cpp
+++ b/src/script/interpreter.cpp
@@ -229,7 +229,7 @@ bool static CheckMinimalPush(const valtype& data, opcodetype opcode) {
return true;
}
-bool EvalScript(vector<vector<unsigned char> >& stack, const CScript& script, unsigned int flags, const BaseSignatureChecker& checker, ScriptError* serror)
+bool EvalScript(vector<vector<unsigned char> >& stack, const CScript& script, unsigned int flags, const BaseSignatureChecker& checker, SigVersion sigversion, ScriptError* serror)
{
static const CScriptNum bnZero(0);
static const CScriptNum bnOne(1);
@@ -869,13 +869,15 @@ bool EvalScript(vector<vector<unsigned char> >& stack, const CScript& script, un
CScript scriptCode(pbegincodehash, pend);
// Drop the signature, since there's no way for a signature to sign itself
- scriptCode.FindAndDelete(CScript(vchSig));
+ if (sigversion == SIGVERSION_BASE) {
+ scriptCode.FindAndDelete(CScript(vchSig));
+ }
if (!CheckSignatureEncoding(vchSig, flags, serror) || !CheckPubKeyEncoding(vchPubKey, flags, serror)) {
//serror is set
return false;
}
- bool fSuccess = checker.CheckSig(vchSig, vchPubKey, scriptCode);
+ bool fSuccess = checker.CheckSig(vchSig, vchPubKey, scriptCode, sigversion);
popstack(stack);
popstack(stack);
@@ -925,7 +927,9 @@ bool EvalScript(vector<vector<unsigned char> >& stack, const CScript& script, un
for (int k = 0; k < nSigsCount; k++)
{
valtype& vchSig = stacktop(-isig-k);
- scriptCode.FindAndDelete(CScript(vchSig));
+ if (sigversion == SIGVERSION_BASE) {
+ scriptCode.FindAndDelete(CScript(vchSig));
+ }
}
bool fSuccess = true;
@@ -943,7 +947,7 @@ bool EvalScript(vector<vector<unsigned char> >& stack, const CScript& script, un
}
// Check signature
- bool fOk = checker.CheckSig(vchSig, vchPubKey, scriptCode);
+ bool fOk = checker.CheckSig(vchSig, vchPubKey, scriptCode, sigversion);
if (fOk) {
isig++;
@@ -1106,8 +1110,64 @@ public:
} // anon namespace
-uint256 SignatureHash(const CScript& scriptCode, const CTransaction& txTo, unsigned int nIn, int nHashType)
+uint256 SignatureHash(const CScript& scriptCode, const CTransaction& txTo, unsigned int nIn, int nHashType, const CAmount& amount, SigVersion sigversion)
{
+ if (sigversion == SIGVERSION_WITNESS_V0) {
+ uint256 hashPrevouts;
+ uint256 hashSequence;
+ uint256 hashOutputs;
+
+ if (!(nHashType & SIGHASH_ANYONECANPAY)) {
+ CHashWriter ss(SER_GETHASH, 0);
+ for (unsigned int n = 0; n < txTo.vin.size(); n++) {
+ ss << txTo.vin[n].prevout;
+ }
+ hashPrevouts = ss.GetHash(); // TODO: cache this value for all signatures in a transaction
+ }
+
+ if (!(nHashType & SIGHASH_ANYONECANPAY) && (nHashType & 0x1f) != SIGHASH_SINGLE && (nHashType & 0x1f) != SIGHASH_NONE) {
+ CHashWriter ss(SER_GETHASH, 0);
+ for (unsigned int n = 0; n < txTo.vin.size(); n++) {
+ ss << txTo.vin[n].nSequence;
+ }
+ hashSequence = ss.GetHash(); // TODO: cache this value for all signatures in a transaction
+ }
+
+ if ((nHashType & 0x1f) != SIGHASH_SINGLE && (nHashType & 0x1f) != SIGHASH_NONE) {
+ CHashWriter ss(SER_GETHASH, 0);
+ for (unsigned int n = 0; n < txTo.vout.size(); n++) {
+ ss << txTo.vout[n];
+ }
+ hashOutputs = ss.GetHash(); // TODO: cache this value for all signatures in a transaction
+ } else if ((nHashType & 0x1f) == SIGHASH_SINGLE && nIn < txTo.vout.size()) {
+ CHashWriter ss(SER_GETHASH, 0);
+ ss << txTo.vout[nIn];
+ hashOutputs = ss.GetHash();
+ }
+
+ CHashWriter ss(SER_GETHASH, 0);
+ // Version
+ ss << txTo.nVersion;
+ // Input prevouts/nSequence (none/all, depending on flags)
+ ss << hashPrevouts;
+ ss << hashSequence;
+ // The input being signed (replacing the scriptSig with scriptCode + amount)
+ // The prevout may already be contained in hashPrevout, and the nSequence
+ // may already be contain in hashSequence.
+ ss << txTo.vin[nIn].prevout;
+ ss << static_cast<const CScriptBase&>(scriptCode);
+ ss << amount;
+ ss << txTo.vin[nIn].nSequence;
+ // Outputs (none/one/all, depending on flags)
+ ss << hashOutputs;
+ // Locktime
+ ss << txTo.nLockTime;
+ // Sighash type
+ ss << nHashType;
+
+ return ss.GetHash();
+ }
+
static const uint256 one(uint256S("0000000000000000000000000000000000000000000000000000000000000001"));
if (nIn >= txTo.vin.size()) {
// nIn out of range
@@ -1136,7 +1196,7 @@ bool TransactionSignatureChecker::VerifySignature(const std::vector<unsigned cha
return pubkey.Verify(sighash, vchSig);
}
-bool TransactionSignatureChecker::CheckSig(const vector<unsigned char>& vchSigIn, const vector<unsigned char>& vchPubKey, const CScript& scriptCode) const
+bool TransactionSignatureChecker::CheckSig(const vector<unsigned char>& vchSigIn, const vector<unsigned char>& vchPubKey, const CScript& scriptCode, SigVersion sigversion) const
{
CPubKey pubkey(vchPubKey);
if (!pubkey.IsValid())
@@ -1149,7 +1209,7 @@ bool TransactionSignatureChecker::CheckSig(const vector<unsigned char>& vchSigIn
int nHashType = vchSig.back();
vchSig.pop_back();
- uint256 sighash = SignatureHash(scriptCode, *txTo, nIn, nHashType);
+ uint256 sighash = SignatureHash(scriptCode, *txTo, nIn, nHashType, amount, sigversion);
if (!VerifySignature(vchSig, pubkey, sighash))
return false;
@@ -1280,7 +1340,7 @@ static bool VerifyWitnessProgram(const CScriptWitness& witness, int witversion,
return set_error(serror, SCRIPT_ERR_PUSH_SIZE);
}
- if (!EvalScript(stack, scriptPubKey, flags, checker, serror)) {
+ if (!EvalScript(stack, scriptPubKey, flags, checker, SIGVERSION_WITNESS_V0, serror)) {
return false;
}
@@ -1307,12 +1367,12 @@ bool VerifyScript(const CScript& scriptSig, const CScript& scriptPubKey, const C
}
vector<vector<unsigned char> > stack, stackCopy;
- if (!EvalScript(stack, scriptSig, flags, checker, serror))
+ if (!EvalScript(stack, scriptSig, flags, checker, SIGVERSION_BASE, serror))
// serror is set
return false;
if (flags & SCRIPT_VERIFY_P2SH)
stackCopy = stack;
- if (!EvalScript(stack, scriptPubKey, flags, checker, serror))
+ if (!EvalScript(stack, scriptPubKey, flags, checker, SIGVERSION_BASE, serror))
// serror is set
return false;
if (stack.empty())
@@ -1358,7 +1418,7 @@ bool VerifyScript(const CScript& scriptSig, const CScript& scriptPubKey, const C
CScript pubKey2(pubKeySerialized.begin(), pubKeySerialized.end());
popstack(stack);
- if (!EvalScript(stack, pubKey2, flags, checker, serror))
+ if (!EvalScript(stack, pubKey2, flags, checker, SIGVERSION_BASE, serror))
// serror is set
return false;
if (stack.empty())
generated by cgit v1.2.3 (git 2.26.2) at 2024-08-24 08:41:05 +0000