342 lines
8.4 KiB
Python
342 lines
8.4 KiB
Python
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from construct import *
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from construct.macros import UBInt64
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"""
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http://developer.apple.com/library/mac/#technotes/tn/tn1150.html
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"""
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def getString(obj):
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return obj.HFSUniStr255.unicode
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S_IFLNK = 0120000
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kSymLinkFileType = 0x736C6E6B
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kSymLinkCreator = 0x72686170
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kHardLinkFileType = 0x686C6E6B
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kHFSPlusCreator = 0x6866732B
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kHFSCaseFolding = 0xCF
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kHFSBinaryCompare = 0xBC
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def is_symlink(rec):
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return rec.FileInfo.fileCreator == kSymLinkCreator and rec.FileInfo.fileType == kSymLinkFileType
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kHFSRootParentID = 1
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kHFSRootFolderID = 2
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kHFSExtentsFileID = 3
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kHFSCatalogFileID = 4
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kHFSBadBlockFileID = 5
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kHFSAllocationFileID = 6
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kHFSStartupFileID = 7
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kHFSAttributesFileID = 8
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kHFSRepairCatalogFileID = 14
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kHFSBogusExtentFileID = 15
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kHFSFirstUserCatalogNodeID = 16
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kBTLeafNode = -1
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kBTIndexNode = 0
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kBTHeaderNode = 1
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kBTMapNode = 2
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kHFSPlusFolderRecord = 0x0001
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kHFSPlusFileRecord = 0x0002
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kHFSPlusFolderThreadRecord = 0x0003
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kHFSPlusFileThreadRecord = 0x0004
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kHFSPlusAttrInlineData = 0x10
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kHFSPlusAttrForkData = 0x20
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kHFSPlusAttrExtents = 0x30
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kForkTypeData = 0
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kForkTypeRsrc = 0xFF
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kHFSVolumeHardwareLockBit = 7
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kHFSVolumeUnmountedBit = 8
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kHFSVolumeSparedBlocksBit = 9
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kHFSVolumeNoCacheRequiredBit = 10
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kHFSBootVolumeInconsistentBit = 11
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kHFSCatalogNodeIDsReusedBit = 12
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kHFSVolumeJournaledBit = 13
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kHFSVolumeSoftwareLockBit = 15
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DECMPFS_MAGIC = 0x636d7066 #cmpf
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HFSPlusExtentDescriptor = Struct("HFSPlusExtentDescriptor",
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UBInt32("startBlock"),
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UBInt32("blockCount")
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)
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HFSPlusExtentRecord = Array(8,HFSPlusExtentDescriptor)
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HFSPlusForkData = Struct("HFSPlusForkData",
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UBInt64("logicalSize"),
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UBInt32("clumpSize"),
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UBInt32("totalBlocks"),
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Array(8, HFSPlusExtentDescriptor)
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)
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HFSPlusVolumeHeader= Struct("HFSPlusVolumeHeader",
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UBInt16("signature"),
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UBInt16("version"),
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UBInt32("attributes"),
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UBInt32("lastMountedVersion"),
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UBInt32("journalInfoBlock"),
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UBInt32("createDate"),
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UBInt32("modifyDate"),
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UBInt32("backupDate"),
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UBInt32("checkedDate"),
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UBInt32("fileCount"),
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UBInt32("folderCount"),
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UBInt32("blockSize"),
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UBInt32("totalBlocks"),
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UBInt32("freeBlocks"),
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UBInt32("nextAllocation"),
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UBInt32("rsrcClumpSize"),
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UBInt32("dataClumpSize"),
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UBInt32("nextCatalogID"),
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UBInt32("writeCount"),
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UBInt64("encodingsBitmap"),
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Array(8, UBInt32("finderInfo")),
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Struct("allocationFile", Embed(HFSPlusForkData)),
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Struct("extentsFile", Embed(HFSPlusForkData)),
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Struct("catalogFile", Embed(HFSPlusForkData)),
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Struct("attributesFile", Embed(HFSPlusForkData)),
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Struct("startupFile", Embed(HFSPlusForkData)),
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)
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BTNodeDescriptor = Struct("BTNodeDescriptor",
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UBInt32("fLink"),
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UBInt32("bLink"),
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SBInt8("kind"),
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UBInt8("height"),
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UBInt16("numRecords"),
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UBInt16("reserved")
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)
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BTHeaderRec = Struct("BTHeaderRec",
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UBInt16("treeDepth"),
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UBInt32("rootNode"),
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UBInt32("leafRecords"),
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UBInt32("firstLeafNode"),
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UBInt32("lastLeafNode"),
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UBInt16("nodeSize"),
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UBInt16("maxKeyLength"),
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UBInt32("totalNodes"),
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UBInt32("freeNodes"),
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UBInt16("reserved1"),
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UBInt32("clumpSize"),
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UBInt8("btreeType"),
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UBInt8("keyCompareType"),
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UBInt32("attributes"),
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Array(16, UBInt32("reserved3"))
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)
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HFSUniStr255 = Struct("HFSUniStr255",
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UBInt16("length"),
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String("unicode", lambda ctx: ctx["length"] * 2, encoding="utf-16-be")
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)
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HFSPlusAttrKey = Struct("HFSPlusAttrKey",
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UBInt16("keyLength"),
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UBInt16("pad"),
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UBInt32("fileID"),
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UBInt32("startBlock"),
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HFSUniStr255,
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#UBInt32("nodeNumber")
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)
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HFSPlusAttrData = Struct("HFSPlusAttrData",
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UBInt32("recordType"),
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Array(2, UBInt32("reserved")),
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UBInt32("size"),
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MetaField("data", lambda ctx: ctx["size"])
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)
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HFSPlusCatalogKey = Struct("HFSPlusCatalogKey",
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UBInt16("keyLength"),
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UBInt32("parentID"),
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HFSUniStr255
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)
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HFSPlusBSDInfo = Struct("HFSPlusBSDInfo",
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UBInt32("ownerID"),
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UBInt32("groupID"),
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UBInt8("adminFlags"),
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UBInt8("ownerFlags"),
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UBInt16("fileMode"),
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UBInt32("union_special")
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)
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Point = Struct("Point",
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SBInt16("v"),
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SBInt16("h")
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)
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Rect = Struct("Rect",
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SBInt16("top"),
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SBInt16("left"),
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SBInt16("bottom"),
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SBInt16("right")
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)
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FileInfo = Struct("FileInfo",
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UBInt32("fileType"),
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UBInt32("fileCreator"),
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UBInt16("finderFlags"),
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Point,
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UBInt16("reservedField")
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)
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ExtendedFileInfo = Struct("ExtendedFileInfo",
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Array(4, SBInt16("reserved1")),
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UBInt16("extendedFinderFlags"),
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SBInt16("reserved2"),
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SBInt32("putAwayFolderID")
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)
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FolderInfo = Struct("FolderInfo",
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Rect,
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UBInt16("finderFlags"),
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Point,
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UBInt16("reservedField")
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)
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ExtendedFolderInfo = Struct("ExtendedFolderInfo",
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Point,
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SBInt32("reserved1"),
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UBInt16("extendedFinderFlags"),
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SBInt16("reserved2"),
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SBInt32("putAwayFolderID")
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)
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HFSPlusCatalogFolder = Struct("HFSPlusCatalogFolder",
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UBInt16("flags"),
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UBInt32("valence"),
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UBInt32("folderID"),
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UBInt32("createDate"),
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UBInt32("contentModDate"),
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UBInt32("attributeModDate"),
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UBInt32("accessDate"),
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UBInt32("backupDate"),
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HFSPlusBSDInfo,
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FolderInfo,
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ExtendedFolderInfo,
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UBInt32("textEncoding"),
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UBInt32("reserved")
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)
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HFSPlusCatalogFile = Struct("HFSPlusCatalogFile",
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UBInt16("flags"),
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UBInt32("reserved1"),
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UBInt32("fileID"),
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UBInt32("createDate"),
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UBInt32("contentModDate"),
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UBInt32("attributeModDate"),
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UBInt32("accessDate"),
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UBInt32("backupDate"),
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HFSPlusBSDInfo,
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FileInfo,
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ExtendedFileInfo,
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UBInt32("textEncoding"),
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UBInt32("reserved2"),
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Struct("dataFork", Embed(HFSPlusForkData)),
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Struct("resourceFork", Embed(HFSPlusForkData))
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)
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HFSPlusCatalogThread = Struct("HFSPlusCatalogThread",
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SBInt16("reserved"),
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UBInt32("parentID"),
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HFSUniStr255,
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)
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HFSPlusCatalogData = Struct("HFSPlusCatalogData",
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UBInt16("recordType"),
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Switch("data", lambda ctx: ctx["recordType"],
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{
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kHFSPlusFolderRecord : HFSPlusCatalogFolder,
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kHFSPlusFileRecord : HFSPlusCatalogFile,
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kHFSPlusFolderThreadRecord: HFSPlusCatalogThread,
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kHFSPlusFileThreadRecord: HFSPlusCatalogThread
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},
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default=HFSPlusCatalogFolder #XXX: should not reach
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)
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)
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HFSPlusExtentKey = Struct("HFSPlusExtentKey",
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UBInt16("keyLength"),
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UBInt8("forkType"),
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UBInt8("pad"),
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UBInt32("fileID"),
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UBInt32("startBlock")
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)
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HFSPlusDecmpfs = Struct("HFSPlusDecmpfs ",
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ULInt32("compression_magic"),
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ULInt32("compression_type"),
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ULInt64("uncompressed_size"),
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)
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HFSPlusCmpfRsrcHead = Struct("HFSPlusCmpfRsrcHead",
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UBInt32("headerSize"),
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UBInt32("totalSize"),
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UBInt32("dataSize"),
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UBInt32("flags")
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)
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HFSPlusCmpfRsrcBlock = Struct("HFSPlusCmpfRsrcBlock",
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ULInt32("offset"),
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ULInt32("size")
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)
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HFSPlusCmpfRsrcBlockHead = Struct("HFSPlusCmpfRsrcBlockHead",
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UBInt32("dataSize"),
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ULInt32("numBlocks"),
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Array(lambda ctx:ctx["numBlocks"], HFSPlusCmpfRsrcBlock)
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)
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HFSPlusCmpfEnd = Struct("HFSPlusCmpfEnd",
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Array(6, UBInt32("pad")),
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UBInt16("unk1"),
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UBInt16("unk2"),
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UBInt16("unk3"),
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UBInt32("magic"),
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UBInt32("flags"),
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UBInt64("size"),
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UBInt32("unk4")
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)
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"""
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Journal stuff
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"""
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JournalInfoBlock = Struct("JournalInfoBlock",
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UBInt32("flags"),
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Array(8, UBInt32("device_signature")),
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UBInt64("offset"),
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UBInt64("size"),
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Array(32, UBInt32("reserved"))
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)
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journal_header = Struct("journal_header",
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ULInt32("magic"),
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ULInt32("endian"),
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ULInt64("start"),
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ULInt64("end"),
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ULInt64("size"),
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ULInt32("blhdr_size"),
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ULInt32("checksum"),
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ULInt32("jhdr_size")
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)
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block_info = Struct("block_info",
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ULInt64("bnum"),
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ULInt32("bsize"),
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ULInt32("next")
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)
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block_list_header = Struct("block_list_header",
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ULInt16("max_blocks"),
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ULInt16("num_blocks"),
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ULInt32("bytes_used"),
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SLInt32("checksum"),
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UBInt32("pad"),
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Array(lambda ctx:ctx["num_blocks"], block_info)
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)
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