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Merge #13547: Make signrawtransaction* give an error when amount is needed but missing

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685d1d8115 [tests] Check signrawtransaction* errors on missing prevtx info (Anthony Towns)
a3b065b51f Error on missing amount in signrawtransaction* (Anthony Towns)

Pull request description:

  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.

  Based on Ben Woosley's #12458, Fixes: #12429.

Tree-SHA512: 8e2ff89d5bcf79548e569210af0d850028bc98d86c149b92207c9300ab1d63664a7e2b222c1be403a15941aa5cf36ccc3c0d570ee1c1466f3496b4fe06c17e11
This commit is contained in:
Wladimir J. van der Laan
2018-07-10 17:02:18 +02:00
parent b05ded1764 685d1d8115
commit fad42e8c4a
2 changed files with 61 additions and 1 deletions
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7
src/rpc/rawtransaction.cpp
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@@ -811,7 +811,7 @@ UniValue SignTransaction(CMutableTransaction& mtx, const UniValue& prevTxsUnival
}
Coin newcoin;
newcoin.out.scriptPubKey = scriptPubKey;
newcoin.out.nValue = 0;
newcoin.out.nValue = MAX_MONEY;
if (prevOut.exists("amount")) {
newcoin.out.nValue = AmountFromValue(find_value(prevOut, "amount"));
}
@@ -883,6 +883,11 @@ UniValue SignTransaction(CMutableTransaction& mtx, const UniValue& prevTxsUnival
UpdateInput(txin, 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;
if (!VerifyScript(txin.scriptSig, prevPubKey, &txin.scriptWitness, STANDARD_SCRIPT_VERIFY_FLAGS, TransactionSignatureChecker(&txConst, i, amount), &serror)) {
if (serror == SCRIPT_ERR_INVALID_STACK_OPERATION) {