ssl: Add common key parser for backends

This internal implementation of QSslKey can be used when OpenSSL is not
available. Encrypted keys are not supported, as the cryptography must
be supplied by a separate library.

With this commit, WinRT is migrated to the new implementation,
but qsslkey_winrt.cpp is left in place so that the missing crypto
implementation can be added later. This also means most of the expected
failures for that platform can be removed from the autotest.

Change-Id: I24a3ad1053bb72311613b28b3ae845aa1645a321
Reviewed-by: Andrew Knight <andrew.knight@digia.com>
Reviewed-by: Maurice Kalinowski <maurice.kalinowski@digia.com>
Reviewed-by: Richard J. Moore <rich@kde.org>

1 files changed, 185 insertions, 0 deletions

diff --git a/src/network/ssl/qsslkey_qt.cpp b/src/network/ssl/qsslkey_qt.cpp
new file mode 100644
index 0000000000..1e60476601
--- /dev/null
+++ b/src/network/ssl/qsslkey_qt.cpp
@@ -0,0 +1,185 @@
+/****************************************************************************
+**
+** Copyright (C) 2014 Jeremy Lainé <jeremy.laine@m4x.org>
+** Contact: http://www.qt-project.org/legal
+**
+** This file is part of the QtNetwork module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and Digia.  For licensing terms and
+** conditions see http://qt.digia.com/licensing.  For further information
+** use the contact form at http://qt.digia.com/contact-us.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Digia gives you certain additional
+** rights.  These rights are described in the Digia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3.0 as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU General Public License version 3.0 requirements will be
+** met: http://www.gnu.org/copyleft/gpl.html.
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "qsslkey.h"
+#include "qsslkey_p.h"
+#include "qasn1element_p.h"
+
+QT_USE_NAMESPACE
+
+static const quint8 bits_table[256] = {
+    0,1,2,2,3,3,3,3,4,4,4,4,4,4,4,4,
+    5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,
+    6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,
+    6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,
+    7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,
+    7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,
+    7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,
+    7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,
+    8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,
+    8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,
+    8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,
+    8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,
+    8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,
+    8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,
+    8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,
+    8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,
+};
+
+static int numberOfBits(const QByteArray &modulus)
+{
+    int bits = modulus.size() * 8;
+    for (int i = 0; i < modulus.size(); ++i) {
+        quint8 b = modulus[i];
+        bits -= 8;
+        if (b != 0) {
+            bits += bits_table[b];
+            break;
+        }
+    }
+    return bits;
+}
+
+void QSslKeyPrivate::clear(bool deep)
+{
+    Q_UNUSED(deep);
+    isNull = true;
+    derData.clear();
+    keyLength = -1;
+}
+
+void QSslKeyPrivate::decodeDer(const QByteArray &der, const QByteArray &passPhrase,
+                               bool deepClear)
+{
+    clear(deepClear);
+
+    if (der.isEmpty())
+        return;
+
+    if (type == QSsl::PrivateKey && !passPhrase.isEmpty()) {
+        Q_UNIMPLEMENTED();
+        return;
+    }
+
+    QAsn1Element elem;
+    if (!elem.read(der) || elem.type() != QAsn1Element::SequenceType)
+        return;
+
+    if (type == QSsl::PublicKey) {
+        // key info
+        QDataStream keyStream(elem.value());
+        if (!elem.read(keyStream) || elem.type() != QAsn1Element::SequenceType)
+            return;
+        QVector<QAsn1Element> infoItems = elem.toVector();
+        if (infoItems.size() < 2 || infoItems[0].type() != QAsn1Element::ObjectIdentifierType)
+            return;
+        if (algorithm == QSsl::Rsa) {
+            if (infoItems[0].toObjectId() != "1.2.840.113549.1.1.1")
+                return;
+            // key data
+            if (!elem.read(keyStream) || elem.type() != QAsn1Element::BitStringType || elem.value().isEmpty())
+                return;
+            if (!elem.read(elem.value().mid(1)) || elem.type() != QAsn1Element::SequenceType)
+                return;
+            if (!elem.read(elem.value()) || elem.type() != QAsn1Element::IntegerType)
+                return;
+            keyLength = numberOfBits(elem.value());
+        } else if (algorithm == QSsl::Dsa) {
+            if (infoItems[0].toObjectId() != "1.2.840.10040.4.1")
+                return;
+            if (infoItems[1].type() != QAsn1Element::SequenceType)
+                return;
+            // key params
+            QVector<QAsn1Element> params = infoItems[1].toVector();
+            if (params.isEmpty() || params[0].type() != QAsn1Element::IntegerType)
+                return;
+            keyLength = numberOfBits(params[0].value());
+        }
+
+    } else {
+        QVector<QAsn1Element> items = elem.toVector();
+        if (items.isEmpty())
+            return;
+
+        // version
+        if (items[0].type() != QAsn1Element::IntegerType || items[0].value().toHex() != "00")
+            return;
+
+        if (algorithm == QSsl::Rsa) {
+            if (items.size() != 9 || items[1].type() != QAsn1Element::IntegerType)
+                return;
+            keyLength = numberOfBits(items[1].value());
+        } else if (algorithm == QSsl::Dsa) {
+            if (items.size() != 6 || items[1].type() != QAsn1Element::IntegerType)
+                return;
+            keyLength = numberOfBits(items[1].value());
+        }
+    }
+
+    derData = der;
+    isNull = false;
+}
+
+void QSslKeyPrivate::decodePem(const QByteArray &pem, const QByteArray &passPhrase,
+                               bool deepClear)
+{
+    decodeDer(derFromPem(pem), passPhrase, deepClear);
+}
+
+int QSslKeyPrivate::length() const
+{
+    return keyLength;
+}
+
+QByteArray QSslKeyPrivate::toPem(const QByteArray &passPhrase) const
+{
+    if (type == QSsl::PrivateKey && !passPhrase.isEmpty()) {
+        Q_UNIMPLEMENTED();
+        return QByteArray();
+    }
+
+    return pemFromDer(derData);
+}
+
+Qt::HANDLE QSslKeyPrivate::handle() const
+{
+    return opaque;
+}