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[Qt] add BIP70 payment request size DoS protection for URIs

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- current code only does this for payment request files, which are
  used on Mac
- also rename readPaymentRequest to readPaymentRequestFromFile, so it's
  obvious that function only handles payment request files and not URIs
- small logging changes in readPaymentRequestFromFile
This commit is contained in:
Philip Kaufmann 2014-11-19 12:53:57 +01:00
parent 2284ccbd13
commit 31f84944a5
2 changed files with 33 additions and 13 deletions
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44
src/qt/paymentserver.cpp
View file

@ -226,7 +226,7 @@ void PaymentServer::ipcParseCommandLine(int argc, char* argv[])
savedPaymentRequests.append(arg);
PaymentRequestPlus request;
if (readPaymentRequest(arg, request))
if (readPaymentRequestFromFile(arg, request))
{
if (request.getDetails().network() == "main")
{
@ -452,7 +452,7 @@ void PaymentServer::handleURIOrFile(const QString& s)
{
PaymentRequestPlus request;
SendCoinsRecipient recipient;
if (!readPaymentRequest(s, request))
if (!readPaymentRequestFromFile(s, request))
{
emit message(tr("Payment request file handling"),
tr("Payment request file cannot be read! This can be caused by an invalid payment request file."),
@ -486,18 +486,25 @@ void PaymentServer::handleURIConnection()
handleURIOrFile(msg);
}
bool PaymentServer::readPaymentRequest(const QString& filename, PaymentRequestPlus& request)
//
// Warning: readPaymentRequestFromFile() is used in ipcSendCommandLine()
// so don't use "emit message()", but "QMessageBox::"!
//
bool PaymentServer::readPaymentRequestFromFile(const QString& filename, PaymentRequestPlus& request)
{
QFile f(filename);
if (!f.open(QIODevice::ReadOnly))
{
qWarning() << "PaymentServer::readPaymentRequest : Failed to open " << filename;
if (!f.open(QIODevice::ReadOnly)) {
qWarning() << QString("PaymentServer::%1: Failed to open %2").arg(__func__).arg(filename);
return false;
}
if (f.size() > BIP70_MAX_PAYMENTREQUEST_SIZE)
{
qWarning() << "PaymentServer::readPaymentRequest : " << filename << " too large";
// BIP70 DoS protection
if (f.size() > BIP70_MAX_PAYMENTREQUEST_SIZE) {
qWarning() << QString("PaymentServer::%1: Payment request %2 is too large (%3 bytes, allowed %4 bytes).")
.arg(__func__)
.arg(filename)
.arg(f.size())
.arg(BIP70_MAX_PAYMENTREQUEST_SIZE);
return false;
}
@ -657,13 +664,26 @@ void PaymentServer::fetchPaymentACK(CWallet* wallet, SendCoinsRecipient recipien
void PaymentServer::netRequestFinished(QNetworkReply* reply)
{
reply->deleteLater();
if (reply->error() != QNetworkReply::NoError)
{
// BIP70 DoS protection
if (reply->size() > BIP70_MAX_PAYMENTREQUEST_SIZE) {
QString msg = tr("Payment request %2 is too large (%3 bytes, allowed %4 bytes).")
.arg(__func__)
.arg(reply->request().url().toString())
.arg(reply->size())
.arg(BIP70_MAX_PAYMENTREQUEST_SIZE);
qWarning() << QString("PaymentServer::%1:").arg(__func__) << msg;
emit message(tr("Payment request DoS protection"), msg, CClientUIInterface::MSG_ERROR);
return;
}
if (reply->error() != QNetworkReply::NoError) {
QString msg = tr("Error communicating with %1: %2")
.arg(reply->request().url().toString())
.arg(reply->errorString());
qWarning() << "PaymentServer::netRequestFinished : " << msg;
qWarning() << "PaymentServer::netRequestFinished: " << msg;
emit message(tr("Payment request error"), msg, CClientUIInterface::MSG_ERROR);
return;
}

2
src/qt/paymentserver.h
View file

@ -118,7 +118,7 @@ protected:
bool eventFilter(QObject *object, QEvent *event);
private:
static bool readPaymentRequest(const QString& filename, PaymentRequestPlus& request);
static bool readPaymentRequestFromFile(const QString& filename, PaymentRequestPlus& request);
bool processPaymentRequest(PaymentRequestPlus& request, SendCoinsRecipient& recipient);
void fetchRequest(const QUrl& url);