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Diffstat (limited to 'coreplugin/ssh/sftpincomingpacket.cpp')
| -rw-r--r-- | coreplugin/ssh/sftpincomingpacket.cpp | 230 |
1 files changed, 230 insertions, 0 deletions
diff --git a/coreplugin/ssh/sftpincomingpacket.cpp b/coreplugin/ssh/sftpincomingpacket.cpp new file mode 100644 index 0000000..804bdb2 --- /dev/null +++ b/coreplugin/ssh/sftpincomingpacket.cpp @@ -0,0 +1,230 @@ +/************************************************************************** +** +** This file is part of Qt Creator +** +** Copyright (c) 2010 Nokia Corporation and/or its subsidiary(-ies). +** +** Contact: Nokia Corporation (qt-info@nokia.com) +** +** Commercial Usage +** +** Licensees holding valid Qt Commercial licenses may use this file in +** accordance with the Qt Commercial License Agreement provided with the +** Software or, alternatively, in accordance with the terms contained in +** a written agreement between you and Nokia. +** +** 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. +** +** If you are unsure which license is appropriate for your use, please +** contact the sales department at http://qt.nokia.com/contact. +** +**************************************************************************/ + +#include "sftpincomingpacket_p.h" + +#include "sshexception_p.h" +#include "sshpacketparser_p.h" + +namespace Core { +namespace Internal { + +namespace { + const int SSH_FILEXFER_ATTR_SIZE = 0x00000001; + const int SSH_FILEXFER_ATTR_UIDGID = 0x00000002; + const int SSH_FILEXFER_ATTR_PERMISSIONS = 0x00000004; + const int SSH_FILEXFER_ATTR_ACMODTIME = 0x00000008; + const int SSH_FILEXFER_ATTR_EXTENDED = 0x80000000; +} // anonymous namespace + +SftpIncomingPacket::SftpIncomingPacket() : m_length(0) +{ +} + +void SftpIncomingPacket::consumeData(QByteArray &newData) +{ +#ifdef CREATOR_SSH_DEBUG + qDebug("%s: current data size = %d, new data size = %d", Q_FUNC_INFO, + m_data.size(), newData.size()); +#endif + + if (isComplete() || dataSize() + newData.size() < sizeof m_length) + return; + + if (dataSize() < sizeof m_length) { + moveFirstBytes(m_data, newData, sizeof m_length - m_data.size()); + m_length = SshPacketParser::asUint32(m_data, static_cast<quint32>(0)); + if (m_length < static_cast<quint32>(TypeOffset + 1) + || m_length > MaxPacketSize) { + throw SSH_SERVER_EXCEPTION(SSH_DISCONNECT_PROTOCOL_ERROR, + "Invalid length field in SFTP packet."); + } + } + + moveFirstBytes(m_data, newData, + qMin<quint32>(m_length - dataSize() + 4, newData.size())); +} + +void SftpIncomingPacket::moveFirstBytes(QByteArray &target, QByteArray &source, + int n) +{ + target.append(source.left(n)); + source.remove(0, n); +} + +bool SftpIncomingPacket::isComplete() const +{ + return m_length == dataSize() - 4; +} + +void SftpIncomingPacket::clear() +{ + m_data.clear(); + m_length = 0; +} + +quint32 SftpIncomingPacket::extractServerVersion() const +{ + Q_ASSERT(isComplete()); + Q_ASSERT(type() == SSH_FXP_VERSION); + try { + return SshPacketParser::asUint32(m_data, TypeOffset + 1); + } catch (SshPacketParseException &) { + throw SSH_SERVER_EXCEPTION(SSH_DISCONNECT_PROTOCOL_ERROR, + "Invalid SSH_FXP_VERSION packet."); + } +} + +SftpHandleResponse SftpIncomingPacket::asHandleResponse() const +{ + Q_ASSERT(isComplete()); + Q_ASSERT(type() == SSH_FXP_HANDLE); + try { + SftpHandleResponse response; + quint32 offset = RequestIdOffset; + response.requestId = SshPacketParser::asUint32(m_data, &offset); + response.handle = SshPacketParser::asString(m_data, &offset); + return response; + } catch (SshPacketParseException &) { + throw SSH_SERVER_EXCEPTION(SSH_DISCONNECT_PROTOCOL_ERROR, + "Invalid SSH_FXP_HANDLE packet"); + } +} + +SftpStatusResponse SftpIncomingPacket::asStatusResponse() const +{ + Q_ASSERT(isComplete()); + Q_ASSERT(type() == SSH_FXP_STATUS); + try { + SftpStatusResponse response; + quint32 offset = RequestIdOffset; + response.requestId = SshPacketParser::asUint32(m_data, &offset); + response.status = static_cast<SftpStatusCode>(SshPacketParser::asUint32(m_data, &offset)); + response.errorString = SshPacketParser::asUserString(m_data, &offset); + response.language = SshPacketParser::asString(m_data, &offset); + return response; + } catch (SshPacketParseException &) { + throw SSH_SERVER_EXCEPTION(SSH_DISCONNECT_PROTOCOL_ERROR, + "Invalid SSH_FXP_STATUS packet."); + } +} + +SftpNameResponse SftpIncomingPacket::asNameResponse() const +{ + Q_ASSERT(isComplete()); + Q_ASSERT(type() == SSH_FXP_NAME); + try { + SftpNameResponse response; + quint32 offset = RequestIdOffset; + response.requestId = SshPacketParser::asUint32(m_data, &offset); + const quint32 count = SshPacketParser::asUint32(m_data, &offset); + for (quint32 i = 0; i < count; ++i) + response.files << asFile(offset); + return response; + } catch (SshPacketParseException &) { + throw SSH_SERVER_EXCEPTION(SSH_DISCONNECT_PROTOCOL_ERROR, + "Invalid SSH_FXP_NAME packet."); + } +} + +SftpDataResponse SftpIncomingPacket::asDataResponse() const +{ + Q_ASSERT(isComplete()); + Q_ASSERT(type() == SSH_FXP_DATA); + try { + SftpDataResponse response; + quint32 offset = RequestIdOffset; + response.requestId = SshPacketParser::asUint32(m_data, &offset); + response.data = SshPacketParser::asString(m_data, &offset); + return response; + } catch (SshPacketParseException &) { + throw SSH_SERVER_EXCEPTION(SSH_DISCONNECT_PROTOCOL_ERROR, + "Invalid SSH_FXP_DATA packet."); + } +} + +SftpAttrsResponse SftpIncomingPacket::asAttrsResponse() const +{ + Q_ASSERT(isComplete()); + Q_ASSERT(type() == SSH_FXP_ATTRS); + try { + SftpAttrsResponse response; + quint32 offset = RequestIdOffset; + response.requestId = SshPacketParser::asUint32(m_data, &offset); + response.attrs = asFileAttributes(offset); + return response; + } catch (SshPacketParseException &) { + throw SSH_SERVER_EXCEPTION(SSH_DISCONNECT_PROTOCOL_ERROR, + "Invalid SSH_FXP_ATTRS packet."); + } +} + +SftpFile SftpIncomingPacket::asFile(quint32 &offset) const +{ + SftpFile file; + file.fileName + = QString::fromUtf8(SshPacketParser::asString(m_data, &offset)); + file.longName + = QString::fromUtf8(SshPacketParser::asString(m_data, &offset)); + file.attributes = asFileAttributes(offset); + return file; +} + +SftpFileAttributes SftpIncomingPacket::asFileAttributes(quint32 &offset) const +{ + SftpFileAttributes attributes; + const quint32 flags = SshPacketParser::asUint32(m_data, &offset); + attributes.sizePresent = flags & SSH_FILEXFER_ATTR_SIZE; + attributes.timesPresent = flags & SSH_FILEXFER_ATTR_ACMODTIME; + attributes.uidAndGidPresent = flags & SSH_FILEXFER_ATTR_UIDGID; + attributes.permissionsPresent = flags & SSH_FILEXFER_ATTR_PERMISSIONS; + if (attributes.sizePresent) + attributes.size = SshPacketParser::asUint64(m_data, &offset); + if (attributes.uidAndGidPresent) { + attributes.uid = SshPacketParser::asUint32(m_data, &offset); + attributes.gid = SshPacketParser::asUint32(m_data, &offset); + } + if (attributes.permissionsPresent) + attributes.permissions = SshPacketParser::asUint32(m_data, &offset); + if (attributes.timesPresent) { + attributes.atime = SshPacketParser::asUint32(m_data, &offset); + attributes.mtime = SshPacketParser::asUint32(m_data, &offset); + } + if (flags & SSH_FILEXFER_ATTR_EXTENDED) { + const quint32 count = SshPacketParser::asUint32(m_data, &offset); + for (quint32 i = 0; i < count; ++i) { + SshPacketParser::asString(m_data, &offset); + SshPacketParser::asString(m_data, &offset); + } + } + return attributes; +} + +} // namespace Internal +} // namespace Core |