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>

1 files changed, 156 insertions, 0 deletions

diff --git a/src/libs/ssh/sshpacketparser.cpp b/src/libs/ssh/sshpacketparser.cpp
new file mode 100644
index 0000000000..c5197fc01c
--- /dev/null
+++ b/src/libs/ssh/sshpacketparser.cpp
@@ -0,0 +1,156 @@
+/**************************************************************************
+**
+** 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 "sshpacketparser_p.h"
+
+#include <cctype>
+
+namespace QSsh {
+namespace Internal {
+
+namespace { quint32 size(const QByteArray &data) { return data.size(); } }
+
+QString SshPacketParser::asUserString(const QByteArray &rawString)
+{
+    QByteArray filteredString;
+    filteredString.resize(rawString.size());
+    for (int i = 0; i < rawString.size(); ++i) {
+        const char c = rawString.at(i);
+        filteredString[i]
+            = std::isprint(c) || c == '\n' || c == '\r' || c == '\t' ? c : '?';
+    }
+    return QString::fromUtf8(filteredString);
+}
+
+bool SshPacketParser::asBool(const QByteArray &data, quint32 offset)
+{
+    if (size(data) <= offset)
+        throw SshPacketParseException();
+    return data.at(offset);
+}
+
+bool SshPacketParser::asBool(const QByteArray &data, quint32 *offset)
+{
+    bool b = asBool(data, *offset);
+    ++(*offset);
+    return b;
+}
+
+
+quint32 SshPacketParser::asUint32(const QByteArray &data, quint32 offset)
+{
+    if (size(data) < offset + 4)
+        throw SshPacketParseException();
+    const quint32 value = ((data.at(offset) & 0xff) << 24)
+        + ((data.at(offset + 1) & 0xff) << 16)
+        + ((data.at(offset + 2) & 0xff) << 8) + (data.at(offset + 3) & 0xff);
+    return value;
+}
+
+quint32 SshPacketParser::asUint32(const QByteArray &data, quint32 *offset)
+{
+    const quint32 v = asUint32(data, *offset);
+    *offset += 4;
+    return v;
+}
+
+quint64 SshPacketParser::asUint64(const QByteArray &data, quint32 offset)
+{
+    if (size(data) < offset + 8)
+        throw SshPacketParseException();
+    const quint64 value = (static_cast<quint64>(data.at(offset) & 0xff) << 56)
+        + (static_cast<quint64>(data.at(offset + 1) & 0xff) << 48)
+        + (static_cast<quint64>(data.at(offset + 2) & 0xff) << 40)
+        + (static_cast<quint64>(data.at(offset + 3) & 0xff) << 32)
+        + ((data.at(offset + 4) & 0xff) << 24)
+        + ((data.at(offset + 5) & 0xff) << 16)
+        + ((data.at(offset + 6) & 0xff) << 8)
+        + (data.at(offset + 7) & 0xff);
+    return value;
+}
+
+quint64 SshPacketParser::asUint64(const QByteArray &data, quint32 *offset)
+{
+    const quint64 val = asUint64(data, *offset);
+    *offset += 8;
+    return val;
+}
+
+QByteArray SshPacketParser::asString(const QByteArray &data, quint32 *offset)
+{
+    const quint32 length = asUint32(data, offset);
+    if (size(data) < *offset + length)
+        throw SshPacketParseException();
+    const QByteArray &string = data.mid(*offset, length);
+    *offset += length;
+    return string;
+}
+
+QString SshPacketParser::asUserString(const QByteArray &data, quint32 *offset)
+{
+    return asUserString(asString(data, offset));
+}
+
+SshNameList SshPacketParser::asNameList(const QByteArray &data, quint32 *offset)
+{
+    const quint32 length = asUint32(data, offset);
+    const int listEndPos = *offset + length;
+    if (data.size() < listEndPos)
+        throw SshPacketParseException();
+    SshNameList names(length + 4);
+    int nextNameOffset = *offset;
+    int nextCommaOffset = data.indexOf(',', nextNameOffset);
+    while (nextNameOffset > 0 && nextNameOffset < listEndPos) {
+        const int stringEndPos = nextCommaOffset == -1
+            || nextCommaOffset > listEndPos ? listEndPos : nextCommaOffset;
+        names.names << QByteArray(data.constData() + nextNameOffset,
+            stringEndPos - nextNameOffset);
+        nextNameOffset = nextCommaOffset + 1;
+        nextCommaOffset = data.indexOf(',', nextNameOffset);
+    }
+    *offset += length;
+    return names;
+}
+
+Botan::BigInt SshPacketParser::asBigInt(const QByteArray &data, quint32 *offset)
+{
+    const quint32 length = asUint32(data, offset);
+    if (length == 0)
+        return Botan::BigInt();
+    const Botan::byte *numberStart
+        = reinterpret_cast<const Botan::byte *>(data.constData() + *offset);
+    *offset += length;
+    return Botan::BigInt::decode(numberStart, length);
+}
+
+} // namespace Internal
+} // namespace QSsh