Page MenuHomePhabricator
Differential D4678 Diff 15159 src/script/interpreter.cpp

Changeset View

Standalone View

View Options

src/script/interpreter.cpp

Show First 20 Lines • Show All 96 Lines • ▼ Show 20 Lines switch (opcode) {
break; break;
} }
return false; return false;
} }
bool EvalScript(std::vector<valtype> &stack, const CScript &script, bool EvalScript(std::vector<valtype> &stack, const CScript &script,
uint32_t flags, const BaseSignatureChecker &checker, uint32_t flags, const BaseSignatureChecker &checker,
ScriptError *serror) { ScriptExecutionMetrics &metrics, ScriptError *serror) {
static const CScriptNum bnZero(0); static const CScriptNum bnZero(0);
static const CScriptNum bnOne(1); static const CScriptNum bnOne(1);
static const valtype vchFalse(0); static const valtype vchFalse(0);
static const valtype vchTrue(1, 1); static const valtype vchTrue(1, 1);
CScript::const_iterator pc = script.begin(); CScript::const_iterator pc = script.begin();
CScript::const_iterator pend = script.end(); CScript::const_iterator pend = script.end();
CScript::const_iterator pbegincodehash = script.begin(); CScript::const_iterator pbegincodehash = script.begin();
▲ Show 20 Lines • Show All 766 Lines • ▼ Show 20 Lines try {
// codeseparator // codeseparator
CScript scriptCode(pbegincodehash, pend); CScript scriptCode(pbegincodehash, pend);
// Remove signature for pre-fork scripts // Remove signature for pre-fork scripts
CleanupScriptCode(scriptCode, vchSig, flags); CleanupScriptCode(scriptCode, vchSig, flags);
fSuccess = checker.CheckSig(vchSig, vchPubKey, fSuccess = checker.CheckSig(vchSig, vchPubKey,
scriptCode, flags); scriptCode, flags);
metrics.nSigChecks += 1;
if (!fSuccess && (flags & SCRIPT_VERIFY_NULLFAIL)) { if (!fSuccess && (flags & SCRIPT_VERIFY_NULLFAIL)) {
return set_error(serror, return set_error(serror,
ScriptError::SIG_NULLFAIL); ScriptError::SIG_NULLFAIL);
} }
} }
popstack(stack); popstack(stack);
Show All 31 Lines try {
bool fSuccess = false; bool fSuccess = false;
if (vchSig.size()) { if (vchSig.size()) {
valtype vchHash(32); valtype vchHash(32);
CSHA256() CSHA256()
.Write(vchMessage.data(), vchMessage.size()) .Write(vchMessage.data(), vchMessage.size())
.Finalize(vchHash.data()); .Finalize(vchHash.data());
fSuccess = checker.VerifySignature( fSuccess = checker.VerifySignature(
vchSig, CPubKey(vchPubKey), uint256(vchHash)); vchSig, CPubKey(vchPubKey), uint256(vchHash));
metrics.nSigChecks += 1;
if (!fSuccess && (flags & SCRIPT_VERIFY_NULLFAIL)) { if (!fSuccess && (flags & SCRIPT_VERIFY_NULLFAIL)) {
return set_error(serror, return set_error(serror,
ScriptError::SIG_NULLFAIL); ScriptError::SIG_NULLFAIL);
} }
} }
popstack(stack); popstack(stack);
▲ Show 20 Lines • Show All 138 Lines • ▼ Show 20 Lines try {
scriptCode, flags)) { scriptCode, flags)) {
// This can fail if the signature is empty, // This can fail if the signature is empty,
// which also is a NULLFAIL error as the // which also is a NULLFAIL error as the
// bitfield should have been null in this // bitfield should have been null in this
// situation. // situation.
return set_error(serror, return set_error(serror,
ScriptError::SIG_NULLFAIL); ScriptError::SIG_NULLFAIL);
} }
// this is guaranteed to execute exactly
// nSigsCount times (if not script error)
metrics.nSigChecks += 1;
} }
if ((checkBits >> iKey) != 0) { if ((checkBits >> iKey) != 0) {
// This is a sanity check and should be // This is a sanity check and should be
// unrecheable. // unrecheable.
return set_error( return set_error(
serror, ScriptError::INVALID_BIT_COUNT); serror, ScriptError::INVALID_BIT_COUNT);
} }
▲ Show 20 Lines • Show All 55 Lines • ▼ Show 20 Lines
// If the operation failed, we may require that all // If the operation failed, we may require that all
// signatures must be empty vector // signatures must be empty vector
if (!fSuccess && (flags & SCRIPT_VERIFY_NULLFAIL) && if (!fSuccess && (flags & SCRIPT_VERIFY_NULLFAIL) &&
!areAllSignaturesNull) { !areAllSignaturesNull) {
return set_error(serror, return set_error(serror,
ScriptError::SIG_NULLFAIL); ScriptError::SIG_NULLFAIL);
} }
if (!areAllSignaturesNull) {
// This is not identical to the number of actual
// ECDSA verifies, but, it is an upper bound
// that can be easily determined without doing
// CPU-intensive checks.
metrics.nSigChecks += nKeysCount;
}
} }
// Clean up stack of all arguments // Clean up stack of all arguments
for (size_t i = 0; i < idxDummy; i++) { for (size_t i = 0; i < idxDummy; i++) {
popstack(stack); popstack(stack);
} }
stack.push_back(fSuccess ? vchTrue : vchFalse); stack.push_back(fSuccess ? vchTrue : vchFalse);
▲ Show 20 Lines • Show All 599 Lines • Show Last 20 Lines