1 files changed, 345 insertions, 0 deletions
diff --git a/heimdall-frontend/Source/Packaging.cpp b/heimdall-frontend/Source/Packaging.cpp
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+++ b/heimdall-frontend/Source/Packaging.cpp
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+/* Copyright (c) 2010 Benjamin Dobell, Glass Echidna
+ 
+ Permission is hereby granted, free of charge, to any person obtaining a copy
+ of this software and associated documentation files (the "Software"), to deal
+ in the Software without restriction, including without limitation the rights
+ to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ copies of the Software, and to permit persons to whom the Software is
+ furnished to do so, subject to the following conditions:
+ 
+ The above copyright notice and this permission notice shall be included in
+ all copies or substantial portions of the Software.
+ 
+ THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ THE SOFTWARE.*/
+
+// C/C++ Standard Library
+#include <stdio.h>
+
+// zlib
+#include "zlib.h"
+
+// Qt
+#include <QDateTime>
+#include <QDir>
+
+// Heimdall Frontend
+#include "Packaging.h"
+
+using namespace HeimdallFrontend;
+
+const char *Packaging::ustarMagic = "ustar";
+
+bool Packaging::ExtractTar(QTemporaryFile& tarFile, PackageData *outputPackageData)
+{
+	TarHeader tarHeader;
+
+	tarFile.reset();
+
+	bool previousEmpty = false;
+
+	while (!tarFile.atEnd())
+	{
+		qint64 dataRead = tarFile.read(tarHeader.buffer, TarHeader::kBlockLength);
+
+		if (dataRead != TarHeader::kBlockLength)
+			return (false);
+
+		bool ustarFormat = strcmp(tarHeader.fields.magic, ustarMagic) == 0;
+		bool empty = true;
+
+		for (int i = 0; i < TarHeader::kBlockLength; i++)
+		{
+			if (tarHeader.buffer[i] != 0)
+			{
+				empty = false;
+				break;
+			}
+		}
+
+		if (empty)
+		{
+			if (previousEmpty)
+			{
+				// Two empty blocks in a row means we've reached the end of the archive.
+				// TODO: Make sure we're at the end of the file.
+				break;
+			}
+		}
+		else
+		{
+			// TODO: Check checksum
+
+			bool parsed = false;
+		
+			// The size field is not always null terminated, so we must create a copy and null terminate it for parsing.
+			char fileSizeString[13];
+			memcpy(fileSizeString, tarHeader.fields.size, 12);
+			fileSizeString[12] = '\0';
+
+			qulonglong fileSize = QString(fileSizeString).toULongLong(&parsed, 8);
+
+			if (!parsed)
+			{
+				// TODO: Error message?
+				return (false);
+			}
+
+			if (fileSize > 0 && tarHeader.fields.typeFlag == '0')
+			{
+				// We're working with a file.
+				QString filename = QString::fromUtf8(tarHeader.fields.name);
+
+				// This is slightly pointless as we don't support directories...
+				if (ustarFormat)
+					filename.prepend(tarHeader.fields.prefix);
+
+				QTemporaryFile *outputFile = new QTemporaryFile("XXXXXX-" + filename);
+				outputFile->open();
+
+				outputPackageData->GetFiles().append(outputFile);
+
+				qulonglong dataRemaining = fileSize;
+				char readBuffer[TarHeader::kBlockReadCount * TarHeader::kBlockLength];
+
+				// Copy the file contents from tarFile to outputFile
+				while (dataRemaining > 0)
+				{
+					qint64 fileDataToRead = (dataRemaining < TarHeader::kBlockReadCount * TarHeader::kBlockLength)
+						? dataRemaining : TarHeader::kBlockReadCount * TarHeader::kBlockLength;
+
+					qint64 dataRead = tarFile.read(readBuffer, fileDataToRead + (TarHeader::kBlockLength - fileDataToRead % TarHeader::kBlockLength) % TarHeader::kBlockLength);
+
+					if (dataRead < fileDataToRead || dataRead % TarHeader::kBlockLength != 0)
+						return (false);
+
+					outputFile->write(readBuffer, fileDataToRead);
+
+					dataRemaining -= fileDataToRead;
+				}
+
+				outputFile->close();
+			}
+			else
+			{
+				// We don't support links/directories.
+				return (false);
+			}
+		}
+
+		previousEmpty = empty;
+	}
+
+	return (true);
+}
+
+bool Packaging::CreateTar(const PackageData& packageData, QTemporaryFile *outputTarFile)
+{
+	const QList<FileInfo>& fileInfos = packageData.GetFirmwareInfo().GetFileInfos();
+
+	if (!outputTarFile->open())
+	{
+		// TODO: "Failed to open \"%s\""
+		return (false);
+	}
+
+	bool failure = false;
+
+	TarHeader tarHeader;
+
+	for (int i = 0; i < fileInfos.length(); i++)
+	{
+		memset(tarHeader.buffer, 0, TarHeader::kBlockLength);
+
+		QFile file(fileInfos[i].GetFilename());
+
+		if (!file.open(QFile::ReadOnly))
+		{
+			// TODO: "Failed to open \"%s\""
+			failure = true;
+			break;
+		}
+
+		if (file.size() > TarHeader::kMaxFileSize)
+		{
+			// TODO: "File is too large to packaged"
+			failure = true;
+			break;
+		}
+
+		QFileInfo qtFileInfo(file);
+		strcpy(tarHeader.fields.name, qtFileInfo.fileName().toUtf8().constData());
+		
+		unsigned int mode = 0;
+
+		QFile::Permissions permissions = file.permissions();
+
+		// Other
+		if (permissions.testFlag(QFile::ExeOther))
+			mode |= TarHeader::kModeOtherExecute;
+		if (permissions.testFlag(QFile::WriteOther))
+			mode |= TarHeader::kModeOtherWrite;
+		if (permissions.testFlag(QFile::ReadOther))
+			mode |= TarHeader::kModeOtherRead;
+
+		// Group
+		if (permissions.testFlag(QFile::ExeGroup))
+			mode |= TarHeader::kModeGroupExecute;
+		if (permissions.testFlag(QFile::WriteGroup))
+			mode |= TarHeader::kModeGroupWrite;
+		if (permissions.testFlag(QFile::ReadGroup))
+			mode |= TarHeader::kModeGroupRead;
+
+		// Owner
+		if (permissions.testFlag(QFile::ExeOwner))
+			mode |= TarHeader::kModeOwnerExecute;
+		if (permissions.testFlag(QFile::WriteOwner))
+			mode |= TarHeader::kModeOwnerWrite;
+		if (permissions.testFlag(QFile::ReadOwner))
+			mode |= TarHeader::kModeOwnerRead;
+
+		sprintf(tarHeader.fields.mode, "%o", mode);
+
+		sprintf(tarHeader.fields.userId, "%o", qtFileInfo.ownerId());
+		sprintf(tarHeader.fields.groupId, "%o", qtFileInfo.groupId());
+
+		// Note: We don't support base-256 encoding. Support could be added in future.
+		sprintf(tarHeader.fields.size, "%o", file.size());
+
+		sprintf(tarHeader.fields.modifiedTime, "%o", qtFileInfo.lastModified().toMSecsSinceEpoch());
+		
+		// Regular File
+		tarHeader.fields.typeFlag = '0';
+
+		// Calculate checksum
+		int checksum = 0;
+
+		for (int i = 0; i < TarHeader::kTarHeaderLength; i++)
+			checksum += tarHeader.buffer[i];
+
+		sprintf(tarHeader.fields.checksum, "%o", checksum);
+
+		// Write the header to the TAR file.
+		outputTarFile->write(tarHeader.buffer, TarHeader::kBlockLength);
+
+		char buffer[TarHeader::kBlockWriteCount * TarHeader::kBlockLength];
+
+		for (qint64 i = 0; i < file.size(); i++)
+		{
+			qint64 dataRead = file.read(buffer, TarHeader::kBlockWriteCount * TarHeader::kBlockLength);
+
+			if (outputTarFile->write(buffer, dataRead) != dataRead)
+			{
+				// TODO: "Failed to write data to the temporary TAR file."
+				failure = true;
+				break;
+			}
+
+			if (dataRead % TarHeader::kBlockLength != 0)
+			{
+				int remainingBlockLength = TarHeader::kBlockLength - dataRead % TarHeader::kBlockLength;
+				memset(buffer, 0, remainingBlockLength);
+
+				if (outputTarFile->write(buffer, remainingBlockLength) != remainingBlockLength)
+				{
+					// TODO: "Failed to write data to the temporary TAR file."
+					failure = true;
+					break;
+				}
+			}
+
+			i += dataRead;
+		}
+
+		if (failure)
+			break;
+	}
+
+	if (failure)
+	{
+		outputTarFile->resize(0);
+		outputTarFile->close();
+		return (false);
+	}
+
+	// Write two empty blocks to signify the end of the archive.
+	memset(tarHeader.buffer, 0, TarHeader::kBlockLength);
+	outputTarFile->write(tarHeader.buffer, TarHeader::kBlockLength);
+	outputTarFile->write(tarHeader.buffer, TarHeader::kBlockLength);
+
+	outputTarFile->close();
+
+	return (true);
+}
+
+bool Packaging::ExtractPackage(const QString& packagePath, PackageData *outputPackageData)
+{
+	FILE *compressedPackageFile = fopen(packagePath.toStdString().c_str(), "rb");
+	gzFile packageFile = gzdopen(fileno(compressedPackageFile), "rb");
+
+	QTemporaryFile outputTar("XXXXXX.tar");
+
+	if (!outputTar.open())
+	{
+		gzclose(packageFile);
+
+		return (false);
+	}
+
+	char buffer[32768];
+
+	int bytesRead;
+
+	do
+	{
+		bytesRead = gzread(packageFile, buffer, 32768);
+
+		if (bytesRead == -1)
+		{
+			gzclose(packageFile);
+
+			return (false);
+		}
+
+		outputTar.write(buffer, bytesRead);
+	} while (bytesRead > 0);
+
+	gzclose(packageFile); // Closes packageFile and compressedPackageFile
+
+	if (!ExtractTar(outputTar, outputPackageData))
+		return (false);
+
+	// Find and read firmware.xml
+	for (int i = 0; i < outputPackageData->GetFiles().length(); i++)
+	{
+		QTemporaryFile *file = outputPackageData->GetFiles()[i];
+
+		if (file->fileTemplate() == "XXXXXX-firmware.xml")
+		{
+			if (!outputPackageData->ReadFirmwareInfo(file))
+			{
+				outputPackageData->Clear();
+				return (false);
+			}
+
+			return (true);
+		}
+	}
+
+	return (false);
+}
+
+bool Packaging::BuildPackage(const QString& packagePath, const PackageData& packageData)
+{
+	QTemporaryFile temporaryFile("XXXXXX.tar");
+
+	if (!CreateTar(packageData, &temporaryFile))
+		return (false);
+
+	return (true);
+}