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fix CreateSpamMsgTx signing (GetHash on CHashWriter cannot be used twice)

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This commit is contained in:
Miguel Freitas 2013-07-24 16:08:25 -03:00
parent b05742d7f9
commit 4d43b4a6f0
2 changed files with 45 additions and 19 deletions
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48
src/bitcoind.cpp
View File

@ -123,44 +123,67 @@ bool AppInit(int argc, char* argv[])
return fRet;
}
static const string strSecret1C ("Kwr371tjA9u2rFSMZjTNun2PXXP3WPZu2afRHTcta6KxEUdm1vEw");
static bool TestCreateSpamMsgTx()
{
CTransaction txNew;
txNew.message = CScript() << vector<unsigned char>((const unsigned char*)strSpamMessage.data(), (const unsigned char*)strSpamMessage.data() + strSpamMessage.size());
CBitcoinSecret bsecret1;
bsecret1.SetString (strSecret1C);
CKey key;
key.MakeNewKey(true);
//CKey key = bsecret1.GetKey();
CPubKey pubkey( key.GetPubKey() );
printf("key valid: %d compressed: %d\n", key.IsValid(), key.IsCompressed());
printf("pubkey: %s\n", EncodeBase64(&pubkey[0], pubkey.size()).c_str() );
// compute message hash and sign it
CHashWriter msgHash(SER_GETHASH, PROTOCOL_VERSION);
msgHash << txNew.message;
CHashWriter ss(SER_GETHASH, PROTOCOL_VERSION);
ss << txNew.message;
uint256 hashMsg = ss.GetHash();
// vchSig is sig(hash(message))
vector<unsigned char> vchSig;
if (!key.Sign(msgHash.GetHash(), vchSig)) {
if (!key.Sign(hashMsg, vchSig)) {
printf("CreateNewBlock: Failed to sign SpamMessage\n");
return false;
}
CScript signedHash = CScript() << vector<unsigned char>((const unsigned char*)vchSig.data(), (const unsigned char*)vchSig.data() + vchSig.size());
/*
vector<unsigned char> vchSigCompact;
if (!key.SignCompact(hashMsg, vchSigCompact)) {
printf("CreateNewBlock: Failed to sign SpamMessage2\n");
return false;
}
printf("sign size: %zu signCompact size: %zu\n", vchSig.size(), vchSigCompact.size());
printf("signCompact: %s\n", EncodeBase64(&vchSigCompact[0], vchSigCompact.size()).c_str());
*/
printf("CreateSpamMsgTx: msg = %s user = %s hash = %s signedhash = %s\n", txNew.message.ToString().c_str(), strSpamUser.c_str(),
msgHash.GetHash().ToString().c_str(), signedHash.ToString().c_str() );
hashMsg.ToString().c_str(), EncodeBase64(&vchSig[0], vchSig.size()).c_str() );
// add username and signature
txNew.userName = CScript() << vector<unsigned char>((const unsigned char*)strSpamUser.data(), (const unsigned char*)strSpamUser.data() + strSpamUser.size());
txNew.userName += signedHash;
txNew.userName += CScript() << vchSig;
txNew.pubKey.clear(); // pubKey will be updated to include extranonce
txNew.nNonce = 0; // no update needed for spamMessage's nonce.
std::vector< std::vector<unsigned char> > vData;
txNew.userName.ExtractPushData(vData);
CPubKey pubkey( key.GetPubKey() );
printf("Verify: %d VerifyComp: %d\n",
pubkey.Verify(msgHash.GetHash(),vData[1]),
pubkey.VerifyCompact(msgHash.GetHash(),vData[1]));
printf("Verify: %d\n", pubkey.Verify(hashMsg,vData[1]));
return true;
exit(1);
}
extern void GenesisMiner();
extern void noui_connect();
int main(int argc, char* argv[])
@ -169,14 +192,13 @@ int main(int argc, char* argv[])
fHaveGUI = false;
//GenesisMiner();
//TestCreateSpamMsgTx();
// Connect bitcoind signal handlers
noui_connect();
fRet = AppInit(argc, argv);
TestCreateSpamMsgTx();
if (fRet && fDaemon)
return 0;

16
src/main.cpp
View File

@ -3522,21 +3522,25 @@ static bool CreateSpamMsgTx(CTransaction &txNew)
printf("CreateNewBlock: Failed to get privKey to sign SpamMessage\n");
return false;
}
// compute message hash and sign it
CHashWriter msgHash(SER_GETHASH, PROTOCOL_VERSION);
msgHash << txNew.message;
CHashWriter ss(SER_GETHASH, PROTOCOL_VERSION);
ss << txNew.message;
uint256 hashMsg = ss.GetHash();
// vchSig is sig(hash(message))
vector<unsigned char> vchSig;
if (!key.Sign(msgHash.GetHash(), vchSig)) {
if (!key.Sign(hashMsg, vchSig)) {
printf("CreateNewBlock: Failed to sign SpamMessage\n");
return false;
}
CScript signedHash = CScript() << vector<unsigned char>((const unsigned char*)vchSig.data(), (const unsigned char*)vchSig.data() + vchSig.size());
printf("CreateSpamMsgTx: msg = %s user = %s hash = %s signedhash = %s\n", txNew.message.ToString().c_str(), strSpamUser.c_str(),
msgHash.GetHash().ToString().c_str(), signedHash.ToString().c_str() );
hashMsg.ToString().c_str(), EncodeBase64(&vchSig[0], vchSig.size()).c_str() );
// add username and signature
txNew.userName = CScript() << vector<unsigned char>((const unsigned char*)strSpamUser.data(), (const unsigned char*)strSpamUser.data() + strSpamUser.size());
txNew.userName += signedHash;
txNew.userName += CScript() << vchSig;
txNew.pubKey.clear(); // pubKey will be updated to include extranonce
txNew.nNonce = 0; // no update needed for spamMessage's nonce.