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Abstract out SignatureChecker

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This commit is contained in:
Pieter Wuille
2014-09-10 14:42:22 +02:00
parent 6faee79426
commit c7829ea797
4 changed files with 37 additions and 14 deletions
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19
src/script/interpreter.cpp
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@@ -132,7 +132,7 @@ bool IsCanonicalSignature(const valtype &vchSig, unsigned int flags) {
return true;
}
bool EvalScript(vector<vector<unsigned char> >& stack, const CScript& script, const CTransaction& txTo, unsigned int nIn, unsigned int flags)
bool EvalScript(vector<vector<unsigned char> >& stack, const CScript& script, unsigned int flags, const SignatureChecker& checker)
{
CScript::const_iterator pc = script.begin();
CScript::const_iterator pend = script.end();
@@ -675,7 +675,7 @@ bool EvalScript(vector<vector<unsigned char> >& stack, const CScript& script, co
scriptCode.FindAndDelete(CScript(vchSig));
bool fSuccess = IsCanonicalSignature(vchSig, flags) && IsCanonicalPubKey(vchPubKey, flags) &&
CheckSig(vchSig, vchPubKey, scriptCode, txTo, nIn, flags);
checker.CheckSig(vchSig, vchPubKey, scriptCode, flags);
popstack(stack);
popstack(stack);
@@ -736,7 +736,7 @@ bool EvalScript(vector<vector<unsigned char> >& stack, const CScript& script, co
// Check signature
bool fOk = IsCanonicalSignature(vchSig, flags) && IsCanonicalPubKey(vchPubKey, flags) &&
CheckSig(vchSig, vchPubKey, scriptCode, txTo, nIn, flags);
checker.CheckSig(vchSig, vchPubKey, scriptCode, flags);
if (fOk) {
isig++;
@@ -897,7 +897,7 @@ 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)
{
if (nIn >= txTo.vin.size()) {
LogPrintf("ERROR: SignatureHash() : nIn=%d out of range\n", nIn);
@@ -976,7 +976,7 @@ public:
}
};
bool CheckSig(vector<unsigned char> vchSig, const vector<unsigned char>& vchPubKey, const CScript& scriptCode, const CTransaction& txTo, unsigned int nIn, int flags)
bool SignatureChecker::CheckSig(const vector<unsigned char>& vchSigIn, const vector<unsigned char>& vchPubKey, const CScript& scriptCode, int flags) const
{
static CSignatureCache signatureCache;
@@ -985,6 +985,7 @@ bool CheckSig(vector<unsigned char> vchSig, const vector<unsigned char>& vchPubK
return false;
// Hash type is one byte tacked on to the end of the signature
vector<unsigned char> vchSig(vchSigIn);
if (vchSig.empty())
return false;
int nHashType = vchSig.back();
@@ -1004,14 +1005,14 @@ bool CheckSig(vector<unsigned char> vchSig, const vector<unsigned char>& vchPubK
return true;
}
bool VerifyScript(const CScript& scriptSig, const CScript& scriptPubKey, const CTransaction& txTo, unsigned int nIn, unsigned int flags)
bool VerifyScript(const CScript& scriptSig, const CScript& scriptPubKey, unsigned int flags, const SignatureChecker& checker)
{
vector<vector<unsigned char> > stack, stackCopy;
if (!EvalScript(stack, scriptSig, txTo, nIn, flags))
if (!EvalScript(stack, scriptSig, flags, checker))
return false;
if (flags & SCRIPT_VERIFY_P2SH)
stackCopy = stack;
if (!EvalScript(stack, scriptPubKey, txTo, nIn, flags))
if (!EvalScript(stack, scriptPubKey, flags, checker))
return false;
if (stack.empty())
return false;
@@ -1034,7 +1035,7 @@ bool VerifyScript(const CScript& scriptSig, const CScript& scriptPubKey, const C
CScript pubKey2(pubKeySerialized.begin(), pubKeySerialized.end());
popstack(stackCopy);
if (!EvalScript(stackCopy, pubKey2, txTo, nIn, flags))
if (!EvalScript(stackCopy, pubKey2, flags, checker))
return false;
if (stackCopy.empty())
return false;