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Introduce DeferringSignatureChecker and inherit with SignatureExtractor

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Introduces a DeferringSignatureChecker which simply takes a
BaseSignatureChecker and passes through everything.
SignatureExtractorChecker now subclasses DeferringSignatureChecker. This
allows for all BaseSignatureChecker functions to be implemented for
SignatureExtractorChecker, while allowing for future signature checkers
which opreate similarly to SignatureExtractorChecker.
This commit is contained in:
Andrew Chow 2021-02-12 14:18:50 -05:00
parent e9c037ba64
commit 6965456c10
2 changed files with 32 additions and 4 deletions
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28
src/script/interpreter.h
View file

@ -272,6 +272,34 @@ public:
using TransactionSignatureChecker = GenericTransactionSignatureChecker<CTransaction>;
using MutableTransactionSignatureChecker = GenericTransactionSignatureChecker<CMutableTransaction>;
class DeferringSignatureChecker : public BaseSignatureChecker
{
protected:
BaseSignatureChecker& m_checker;
public:
DeferringSignatureChecker(BaseSignatureChecker& checker) : m_checker(checker) {}
bool CheckECDSASignature(const std::vector<unsigned char>& scriptSig, const std::vector<unsigned char>& vchPubKey, const CScript& scriptCode, SigVersion sigversion) const override
{
return m_checker.CheckECDSASignature(scriptSig, vchPubKey, scriptCode, sigversion);
}
bool CheckSchnorrSignature(Span<const unsigned char> sig, Span<const unsigned char> pubkey, SigVersion sigversion, const ScriptExecutionData& execdata, ScriptError* serror = nullptr) const override
{
return m_checker.CheckSchnorrSignature(sig, pubkey, sigversion, execdata, serror);
}
bool CheckLockTime(const CScriptNum& nLockTime) const override
{
return m_checker.CheckLockTime(nLockTime);
}
bool CheckSequence(const CScriptNum& nSequence) const override
{
return m_checker.CheckSequence(nSequence);
}
};
bool EvalScript(std::vector<std::vector<unsigned char> >& stack, const CScript& script, unsigned int flags, const BaseSignatureChecker& checker, SigVersion sigversion, ScriptExecutionData& execdata, ScriptError* error = nullptr);
bool EvalScript(std::vector<std::vector<unsigned char> >& stack, const CScript& script, unsigned int flags, const BaseSignatureChecker& checker, SigVersion sigversion, ScriptError* error = nullptr);
bool VerifyScript(const CScript& scriptSig, const CScript& scriptPubKey, const CScriptWitness* witness, unsigned int flags, const BaseSignatureChecker& checker, ScriptError* serror = nullptr);

8
src/script/sign.cpp
View file

@ -250,17 +250,17 @@ bool ProduceSignature(const SigningProvider& provider, const BaseSignatureCreato
}
namespace {
class SignatureExtractorChecker final : public BaseSignatureChecker
class SignatureExtractorChecker final : public DeferringSignatureChecker
{
private:
SignatureData& sigdata;
BaseSignatureChecker& checker;
public:
SignatureExtractorChecker(SignatureData& sigdata, BaseSignatureChecker& checker) : sigdata(sigdata), checker(checker) {}
SignatureExtractorChecker(SignatureData& sigdata, BaseSignatureChecker& checker) : DeferringSignatureChecker(checker), sigdata(sigdata) {}
bool CheckECDSASignature(const std::vector<unsigned char>& scriptSig, const std::vector<unsigned char>& vchPubKey, const CScript& scriptCode, SigVersion sigversion) const override
{
if (checker.CheckECDSASignature(scriptSig, vchPubKey, scriptCode, sigversion)) {
if (m_checker.CheckECDSASignature(scriptSig, vchPubKey, scriptCode, sigversion)) {
CPubKey pubkey(vchPubKey);
sigdata.signatures.emplace(pubkey.GetID(), SigPair(pubkey, scriptSig));
return true;