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Use separate SignatureChecker for CMutableTransaction

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This commit is contained in:
Pieter Wuille
2015-01-27 09:28:45 -04:00
parent a62649731f
commit 858809a33e
13 changed files with 49 additions and 39 deletions
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2
src/script/bitcoinconsensus.cpp
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@@ -78,7 +78,7 @@ int bitcoinconsensus_verify_script(const unsigned char *scriptPubKey, unsigned i
// Regardless of the verification result, the tx did not error.
set_error(err, bitcoinconsensus_ERR_OK);
return VerifyScript(tx.vin[nIn].scriptSig, CScript(scriptPubKey, scriptPubKey + scriptPubKeyLen), flags, SignatureChecker(tx, nIn), NULL);
return VerifyScript(tx.vin[nIn].scriptSig, CScript(scriptPubKey, scriptPubKey + scriptPubKeyLen), flags, TransactionSignatureChecker(tx, nIn), NULL);
} catch (const std::exception&) {
return set_error(err, bitcoinconsensus_ERR_TX_DESERIALIZE); // Error deserializing
}

4
src/script/interpreter.cpp
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@@ -1058,12 +1058,12 @@ uint256 SignatureHash(const CScript& scriptCode, const CTransaction& txTo, unsig
return ss.GetHash();
}
bool SignatureChecker::VerifySignature(const std::vector<unsigned char>& vchSig, const CPubKey& pubkey, const uint256& sighash) const
bool TransactionSignatureChecker::VerifySignature(const std::vector<unsigned char>& vchSig, const CPubKey& pubkey, const uint256& sighash) const
{
return pubkey.Verify(sighash, vchSig);
}
bool SignatureChecker::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) const
{
CPubKey pubkey(vchPubKey);
if (!pubkey.IsValid())

14
src/script/interpreter.h
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@@ -7,6 +7,7 @@
#define BITCOIN_SCRIPT_INTERPRETER_H
#include "script_error.h"
#include "primitives/transaction.h"
#include <vector>
#include <stdint.h>
@@ -90,7 +91,7 @@ public:
virtual ~BaseSignatureChecker() {}
};
class SignatureChecker : public BaseSignatureChecker
class TransactionSignatureChecker : public BaseSignatureChecker
{
private:
const CTransaction& txTo;
@@ -100,10 +101,19 @@ protected:
virtual bool VerifySignature(const std::vector<unsigned char>& vchSig, const CPubKey& vchPubKey, const uint256& sighash) const;
public:
SignatureChecker(const CTransaction& txToIn, unsigned int nInIn) : txTo(txToIn), nIn(nInIn) {}
TransactionSignatureChecker(const CTransaction& txToIn, unsigned int nInIn) : txTo(txToIn), nIn(nInIn) {}
bool CheckSig(const std::vector<unsigned char>& scriptSig, const std::vector<unsigned char>& vchPubKey, const CScript& scriptCode) const;
};
class MutableTransactionSignatureChecker : public TransactionSignatureChecker
{
private:
const CTransaction txTo;
public:
MutableTransactionSignatureChecker(const CMutableTransaction& txToIn, unsigned int nInIn) : TransactionSignatureChecker(txTo, nInIn), txTo(txToIn) {}
};
bool EvalScript(std::vector<std::vector<unsigned char> >& stack, const CScript& script, unsigned int flags, const BaseSignatureChecker& checker, ScriptError* error = NULL);
bool VerifyScript(const CScript& scriptSig, const CScript& scriptPubKey, unsigned int flags, const BaseSignatureChecker& checker, ScriptError* error = NULL);

4
src/script/sigcache.cpp
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@@ -74,14 +74,14 @@ public:
}
bool CachingSignatureChecker::VerifySignature(const std::vector<unsigned char>& vchSig, const CPubKey& pubkey, const uint256& sighash) const
bool CachingTransactionSignatureChecker::VerifySignature(const std::vector<unsigned char>& vchSig, const CPubKey& pubkey, const uint256& sighash) const
{
static CSignatureCache signatureCache;
if (signatureCache.Get(sighash, vchSig, pubkey))
return true;
if (!SignatureChecker::VerifySignature(vchSig, pubkey, sighash))
if (!TransactionSignatureChecker::VerifySignature(vchSig, pubkey, sighash))
return false;
if (store)

4
src/script/sigcache.h
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@@ -12,13 +12,13 @@
class CPubKey;
class CachingSignatureChecker : public SignatureChecker
class CachingTransactionSignatureChecker : public TransactionSignatureChecker
{
private:
bool store;
public:
CachingSignatureChecker(const CTransaction& txToIn, unsigned int nInIn, bool storeIn=true) : SignatureChecker(txToIn, nInIn), store(storeIn) {}
CachingTransactionSignatureChecker(const CTransaction& txToIn, unsigned int nInIn, bool storeIn=true) : TransactionSignatureChecker(txToIn, nInIn), store(storeIn) {}
bool VerifySignature(const std::vector<unsigned char>& vchSig, const CPubKey& vchPubKey, const uint256& sighash) const;
};

4
src/script/sign.cpp
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@@ -123,7 +123,7 @@ bool SignSignature(const CKeyStore &keystore, const CScript& fromPubKey, CMutabl
}
// Test solution
return VerifyScript(txin.scriptSig, fromPubKey, STANDARD_SCRIPT_VERIFY_FLAGS, SignatureChecker(txTo, nIn));
return VerifyScript(txin.scriptSig, fromPubKey, STANDARD_SCRIPT_VERIFY_FLAGS, MutableTransactionSignatureChecker(txTo, nIn));
}
bool SignSignature(const CKeyStore &keystore, const CTransaction& txFrom, CMutableTransaction& txTo, unsigned int nIn, int nHashType)
@@ -174,7 +174,7 @@ static CScript CombineMultisig(const CScript& scriptPubKey, const CTransaction&
if (sigs.count(pubkey))
continue; // Already got a sig for this pubkey
if (SignatureChecker(txTo, nIn).CheckSig(sig, pubkey, scriptPubKey))
if (TransactionSignatureChecker(txTo, nIn).CheckSig(sig, pubkey, scriptPubKey))
{
sigs[pubkey] = sig;
break;