Add DummySignatureCreator which just creates zeroed sigs

1 files changed, 36 insertions, 0 deletions

diff --git a/src/script/sign.cpp b/src/script/sign.cpp
index eab629cd91..4543ca303f 100644
--- a/src/script/sign.cpp
+++ b/src/script/sign.cpp
@@ -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;
+}