Move SSH support into a dedicated library.

It does not belong into libUtils, which is a collection of small
unrelated utility classes.

Task-number: QTCREATORBUG-7218
Change-Id: Id92b9f28678afec93e6f07166adfde6550f38072
Reviewed-by: Eike Ziller <eike.ziller@nokia.com>

src/libs/ssh/sshcapabilities.cpp

@@ -0,0 +1,106 @@
+/**************************************************************************
+**
+** This file is part of Qt Creator
+**
+** Copyright (c) 2012 Nokia Corporation and/or its subsidiary(-ies).
+**
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+**
+** GNU Lesser General Public License Usage
+**
+** 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, Nokia gives you certain additional
+** rights. These rights are described in the Nokia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** Other Usage
+**
+** Alternatively, this file may be used in accordance with the terms and
+** conditions contained in a signed written agreement between you and Nokia.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at qt-info@nokia.com.
+**
+**************************************************************************/
+
+#include "sshcapabilities_p.h"
+
+#include "sshexception_p.h"
+
+#include <QCoreApplication>
+#include <QString>
+
+namespace QSsh {
+namespace Internal {
+
+namespace {
+    QByteArray listAsByteArray(const QList<QByteArray> &list)
+    {
+        QByteArray array;
+        foreach(const QByteArray &elem, list)
+            array += elem + ',';
+        if (!array.isEmpty())
+            array.remove(array.count() - 1, 1);
+        return array;
+    }
+} // anonymous namspace
+
+const QByteArray SshCapabilities::DiffieHellmanGroup1Sha1("diffie-hellman-group1-sha1");
+const QByteArray SshCapabilities::DiffieHellmanGroup14Sha1("diffie-hellman-group14-sha1");
+const QList<QByteArray> SshCapabilities::KeyExchangeMethods
+    = QList<QByteArray>() << SshCapabilities::DiffieHellmanGroup1Sha1
+          << SshCapabilities::DiffieHellmanGroup14Sha1;
+
+const QByteArray SshCapabilities::PubKeyDss("ssh-dss");
+const QByteArray SshCapabilities::PubKeyRsa("ssh-rsa");
+const QList<QByteArray> SshCapabilities::PublicKeyAlgorithms
+    = QList<QByteArray>() << SshCapabilities::PubKeyRsa
+          << SshCapabilities::PubKeyDss;
+
+const QByteArray SshCapabilities::CryptAlgo3Des("3des-cbc");
+const QByteArray SshCapabilities::CryptAlgoAes128("aes128-cbc");
+const QList<QByteArray> SshCapabilities::EncryptionAlgorithms
+    = QList<QByteArray>() << SshCapabilities::CryptAlgoAes128
+          << SshCapabilities::CryptAlgo3Des;
+
+const QByteArray SshCapabilities::HMacSha1("hmac-sha1");
+const QByteArray SshCapabilities::HMacSha196("hmac-sha1-96");
+const QList<QByteArray> SshCapabilities::MacAlgorithms
+    = QList<QByteArray>() /* << SshCapabilities::HMacSha196 */
+        << SshCapabilities::HMacSha1;
+
+const QList<QByteArray> SshCapabilities::CompressionAlgorithms
+    = QList<QByteArray>() << "none";
+
+const QByteArray SshCapabilities::SshConnectionService("ssh-connection");
+
+const QByteArray SshCapabilities::PublicKeyAuthMethod("publickey");
+const QByteArray SshCapabilities::PasswordAuthMethod("password");
+
+
+QByteArray SshCapabilities::findBestMatch(const QList<QByteArray> &myCapabilities,
+    const QList<QByteArray> &serverCapabilities)
+{
+    foreach (const QByteArray &myCapability, myCapabilities) {
+        if (serverCapabilities.contains(myCapability))
+            return myCapability;
+    }
+
+    throw SshServerException(SSH_DISCONNECT_KEY_EXCHANGE_FAILED,
+        "Server and client capabilities do not match.",
+        QCoreApplication::translate("SshConnection",
+            "Server and client capabilities don't match. "
+            "Client list was: %1.\nServer list was %2.")
+            .arg(QString::fromLocal8Bit(listAsByteArray(myCapabilities).data()))
+            .arg(QString::fromLocal8Bit(listAsByteArray(serverCapabilities).data())));
+}
+
+} // namespace Internal
+} // namespace QSsh