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Error on missing amount in signrawtransaction*

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Signatures using segregated witness commit to the amount being spent,
so that value must be passed into signrawtransactionwithkey and
signrawtransactionwithwallet. This ensures an error is issued if that
doesn't happen, rather than just assuming the value is 0 and producing
a signature that is almost certainly invalid.

Github-Pull: #13547
Rebased-From: a3b065b51fb333d976108a1fe34b7f663fd67285
This commit is contained in:
Anthony Towns 2018-06-27 17:54:32 +10:00 committed by Luke Dashjr
parent 9d9c4185fa
commit 1825e37075
1 changed files with 6 additions and 1 deletions
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7
src/rpc/rawtransaction.cpp
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@ -820,7 +820,7 @@ UniValue signrawtransaction(const JSONRPCRequest& request)
} }
Coin newcoin; Coin newcoin;
newcoin.out.scriptPubKey = scriptPubKey; newcoin.out.scriptPubKey = scriptPubKey;
newcoin.out.nValue = 0; newcoin.out.nValue = MAX_MONEY;
if (prevOut.exists("amount")) { if (prevOut.exists("amount")) {
newcoin.out.nValue = AmountFromValue(find_value(prevOut, "amount")); newcoin.out.nValue = AmountFromValue(find_value(prevOut, "amount"));
} }
@ -898,6 +898,11 @@ UniValue signrawtransaction(const JSONRPCRequest& request)
UpdateTransaction(mtx, i, sigdata); UpdateTransaction(mtx, i, sigdata);
// amount must be specified for valid segwit signature
if (amount == MAX_MONEY && !txin.scriptWitness.IsNull()) {
throw JSONRPCError(RPC_TYPE_ERROR, strprintf("Missing amount for %s", coin.out.ToString()));
}
ScriptError serror = SCRIPT_ERR_OK; ScriptError serror = SCRIPT_ERR_OK;
if (!VerifyScript(txin.scriptSig, prevPubKey, &txin.scriptWitness, STANDARD_SCRIPT_VERIFY_FLAGS, TransactionSignatureChecker(&txConst, i, amount), &serror)) { if (!VerifyScript(txin.scriptSig, prevPubKey, &txin.scriptWitness, STANDARD_SCRIPT_VERIFY_FLAGS, TransactionSignatureChecker(&txConst, i, amount), &serror)) {
if (serror == SCRIPT_ERR_INVALID_STACK_OPERATION) { if (serror == SCRIPT_ERR_INVALID_STACK_OPERATION) {