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Add DummySignatureCreator which just creates zeroed sigs

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This commit is contained in:
Pieter Wuille 2015-05-01 15:21:06 +02:00 committed by Matt Corallo
parent eba2f061a0
commit 9b4e7d9a5e
2 changed files with 44 additions and 0 deletions
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36
src/script/sign.cpp
View File

@ -275,3 +275,39 @@ CScript CombineSignatures(const CScript& scriptPubKey, const BaseSignatureChecke
return CombineSignatures(scriptPubKey, checker, txType, vSolutions, stack1, stack2);
}
namespace {
/** Dummy signature checker which accepts all signatures. */
class DummySignatureChecker : public BaseSignatureChecker
{
public:
DummySignatureChecker() {}
bool CheckSig(const std::vector<unsigned char>& scriptSig, const std::vector<unsigned char>& vchPubKey, const CScript& scriptCode) const
{
return true;
}
};
const DummySignatureChecker dummyChecker;
}
const BaseSignatureChecker& DummySignatureCreator::Checker() const
{
return dummyChecker;
}
bool DummySignatureCreator::CreateSig(std::vector<unsigned char>& vchSig, const CKeyID& keyid, const CScript& scriptCode) const
{
// Create a dummy signature that is a valid DER-encoding
vchSig.assign(72, '\000');
vchSig[0] = 0x30;
vchSig[1] = 69;
vchSig[2] = 0x02;
vchSig[3] = 33;
vchSig[4] = 0x01;
vchSig[4 + 33] = 0x02;
vchSig[5 + 33] = 32;
vchSig[6 + 33] = 0x01;
vchSig[6 + 33 + 32] = SIGHASH_ALL;
return true;
}

8
src/script/sign.h
View File

@ -43,6 +43,14 @@ public:
bool CreateSig(std::vector<unsigned char>& vchSig, const CKeyID& keyid, const CScript& scriptCode) const;
};
/** A signature creator that just produces 72-byte empty signatyres. */
class DummySignatureCreator : public BaseSignatureCreator {
public:
DummySignatureCreator(const CKeyStore* keystoreIn) : BaseSignatureCreator(keystoreIn) {}
const BaseSignatureChecker& Checker() const;
bool CreateSig(std::vector<unsigned char>& vchSig, const CKeyID& keyid, const CScript& scriptCode) const;
};
/** Produce a script signature using a generic signature creator. */
bool ProduceSignature(const BaseSignatureCreator& creator, const CScript& scriptPubKey, CScript& scriptSig);