Simplify APDU SW usage (open-eid#1292)

IB-8231

Signed-off-by: Raul Metsma <[email protected]>

client/Diagnostics.cpp

@@ -27,6 +27,12 @@
 #include <QtCore/QTextStream>
 #include <QtNetwork/QSslCertificate>
 
+#if QT_VERSION < QT_VERSION_CHECK(5, 15, 0)
+namespace Qt {
+using ::hex;
+}
+#endif
+
 void Diagnostics::generalInfo(QTextStream &s)
 {
 	s << "<b>" << tr("Arguments:") << "</b> " << Application::arguments().join(' ') << "<br />"
@@ -122,10 +128,10 @@ void Diagnostics::generalInfo(QTextStream &s)
 		{
 			constexpr auto APDU = &QByteArray::fromHex;
 			QPCSCReader::Result r = reader.transfer(apdu);
-			s << label << ": " << r.SW.toHex();
-			if (r.SW == APDU("9000")) s << " (OK)";
-			if (r.SW == APDU("6A81")) s << " (Locked)";
-			if (r.SW == APDU("6A82")) s << " (Not found)";
+			s << label << ": " << Qt::hex << r.SW;
+			if (r.SW == 0x9000) s << " (OK)";
+			if (r.SW == 0x6A81) s << " (Locked)";
+			if (r.SW == 0x6A82) s << " (Not found)";
 			s << "<br />";
 			return r;
 		};

client/QSmartCard.cpp

@@ -209,10 +209,9 @@ bool IDEMIACard::loadPerso(QPCSCReader *reader, QSmartCardDataPrivate *d) const
 			readFailed = true;
 			return QSslCertificate();
 		}
-		int size = quint8(fci[0x80][0]) << 8 | quint8(fci[0x80][1]);
 		QByteArray cert;
 		QByteArray cmd = READBINARY;
-		while(cert.size() < size)
+		for(int size = quint8(fci[0x80][0]) << 8 | quint8(fci[0x80][1]); cert.size() < size; )
 		{
 			cmd[2] = char(cert.size() >> 8);
 			cmd[3] = char(cert.size());
@@ -312,7 +311,7 @@ QSmartCard::ErrorType QSmartCard::Private::handlePinResult(QPCSCReader *reader,
 {
 	if(!response || forceUpdate)
 		card->updateCounters(reader, t.d);
-	switch((quint8(response.SW[0]) << 8) + quint8(response.SW[1]))
+	switch(response.SW)
 	{
 	case 0x9000: return QSmartCard::NoError;
 	case 0x63C0: return QSmartCard::BlockedError;//pin retry count 0