qt 6.5.1 original

tests/auto/corelib/serialization/cborlargedatavalidation.cpp

@@ -0,0 +1,120 @@
+// Copyright (C) 2020 Intel Corporation.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
+
+#include <QTest>
+#include <QtEndian>
+
+#include <cbor.h>
+
+namespace {
+// A QIODevice that supplies a fixed header followed by a large sequence of
+// null bytes up until a pre-determined size.
+class LargeIODevice final : public QIODevice
+{
+public:
+    qint64 realSize;
+    QByteArray start;
+
+    LargeIODevice(const QByteArray &start, qint64 size, QObject *parent = nullptr)
+        : QIODevice(parent), realSize(size), start(start)
+    {}
+
+    qint64 size() const override { return realSize; }
+    bool isSequential() const override { return false; }
+
+protected:
+    qint64 readData(char *data, qint64 maxlen) override;
+    qint64 writeData(const char *, qint64) override { return -1; }
+};
+};
+
+qint64 LargeIODevice::readData(char *data, qint64 maxlen)
+{
+    qint64 p = pos();
+    if (maxlen > realSize - p)
+        maxlen = realSize - p;
+    memset(data, '\0', qMin(maxlen, qint64(32 * 1024)));
+
+    qint64 fromstart = start.size() - p;
+    if (fromstart > maxlen)
+        fromstart = maxlen;
+    else if (fromstart < 0)
+        fromstart = 0;
+    if (fromstart)
+        memcpy(data, start.constData() + p, fromstart);
+    return maxlen;
+}
+
+void addValidationLargeData(qsizetype minInvalid, qsizetype maxInvalid)
+{
+    char toolong[1 + sizeof(qsizetype)];
+    for (qsizetype v = maxInvalid; v >= minInvalid; --v) {
+        // 0x5a for 32-bit, 0x5b for 64-bit
+        toolong[0] = sizeof(v) > 4 ? 0x5b : 0x5a;
+        qToBigEndian(v, toolong + 1);
+
+        bool overflows = v > std::numeric_limits<qsizetype>::max() - 1 - qsizetype(sizeof(v));
+        CborError err = overflows ? CborErrorDataTooLarge : CborErrorUnexpectedEOF;
+
+        QTest::addRow("bytearray-too-big-for-qbytearray-%zx", size_t(v))
+                << QByteArray(toolong, sizeof(toolong)) << 0 << err;
+        QTest::addRow("bytearray-chunked-too-big-for-qbytearray-%zx", size_t(v))
+                << ('\x5f' + QByteArray(toolong, sizeof(toolong)) + '\xff')
+                << 0 << err;
+        QTest::addRow("bytearray-2chunked-too-big-for-qbytearray-%zx", size_t(v))
+                << ("\x5f\x40" + QByteArray(toolong, sizeof(toolong)) + '\xff')
+                << 0 << err;
+        toolong[0] |= 0x20;
+
+        // QCborStreamReader::readString copies to a QByteArray first
+        QTest::addRow("string-too-big-for-qbytearray-%zx", size_t(v))
+                << QByteArray(toolong, sizeof(toolong)) << 0 << err;
+        QTest::addRow("string-chunked-too-big-for-qbytearray-%zx", size_t(v))
+                << ('\x7f' + QByteArray(toolong, sizeof(toolong)) + '\xff')
+                << 0 << err;
+        QTest::addRow("string-2chunked-too-big-for-qbytearray-%zx", size_t(v))
+                << ("\x7f\x60" + QByteArray(toolong, sizeof(toolong)) + '\xff')
+                << 0 << err;
+    }
+}
+
+void addValidationHugeDevice(qsizetype byteArrayInvalid, qsizetype stringInvalid)
+{
+    qRegisterMetaType<QSharedPointer<QIODevice>>();
+    QTest::addColumn<QSharedPointer<QIODevice>>("device");
+    QTest::addColumn<CborError>("expectedError");
+    QTest::addColumn<CborError>("expectedValidationError");
+
+    char buf[1 + sizeof(quint64)];
+    auto device = [&buf](QCborStreamReader::Type t, quint64 size) {
+        buf[0] = quint8(t) | 0x1b;
+        qToBigEndian(size, buf + 1);
+        size += sizeof(buf);
+        QSharedPointer<QIODevice> p =
+                QSharedPointer<LargeIODevice>::create(QByteArray(buf, sizeof(buf)), size);
+        return p;
+    };
+
+    // do the exact limits
+    QTest::newRow("bytearray-just-too-big")
+            << device(QCborStreamReader::ByteArray, byteArrayInvalid)
+            << CborErrorDataTooLarge << CborNoError;
+    QTest::newRow("string-just-too-big")
+            << device(QCborStreamReader::String, stringInvalid)
+            << CborErrorDataTooLarge << CborErrorDataTooLarge;
+
+    auto addSize = [=](const char *sizename, qint64 size) {
+        if (byteArrayInvalid < size)
+            QTest::addRow("bytearray-%s", sizename)
+                << device(QCborStreamReader::ByteArray, size)
+                << CborErrorDataTooLarge << CborNoError;
+        if (stringInvalid < size)
+            QTest::addRow("string-%s", sizename)
+                << device(QCborStreamReader::String, size)
+                << CborErrorDataTooLarge << CborErrorDataTooLarge;
+    };
+    addSize("1GB", quint64(1) << 30);
+    addSize("2GB", quint64(1) << 31);
+    addSize("4GB", quint64(1) << 32);
+    addSize("max", std::numeric_limits<qint64>::max() - sizeof(buf));
+}