| d39cb658 |
#ifndef _RAR_HEADERS_
#define _RAR_HEADERS_
#define SIZEOF_MARKHEAD3 7 // Size of RAR 4.x archive mark header.
#define SIZEOF_MAINHEAD14 7 // Size of RAR 1.4 main archive header.
#define SIZEOF_MAINHEAD3 13 // Size of RAR 4.x main archive header.
#define SIZEOF_FILEHEAD14 21 // Size of RAR 1.4 file header.
#define SIZEOF_FILEHEAD3 32 // Size of RAR 3.0 file header.
#define SIZEOF_SHORTBLOCKHEAD 7
#define SIZEOF_LONGBLOCKHEAD 11
#define SIZEOF_SUBBLOCKHEAD 14
#define SIZEOF_COMMHEAD 13
#define SIZEOF_PROTECTHEAD 26
#define SIZEOF_UOHEAD 18
#define SIZEOF_STREAMHEAD 26
#define VER_PACK 29
#define VER_PACK5 50 // It is stored as 0, but we subtract 50 when saving an archive.
#define VER_UNPACK 29
#define VER_UNPACK5 50 // It is stored as 0, but we add 50 when reading an archive.
#define MHD_VOLUME 0x0001U
// Old style main archive comment embed into main archive header. Must not
// be used in new archives anymore.
#define MHD_COMMENT 0x0002U
#define MHD_LOCK 0x0004U
#define MHD_SOLID 0x0008U
#define MHD_PACK_COMMENT 0x0010U
#define MHD_NEWNUMBERING 0x0010U
#define MHD_AV 0x0020U
#define MHD_PROTECT 0x0040U
#define MHD_PASSWORD 0x0080U
#define MHD_FIRSTVOLUME 0x0100U
#define LHD_SPLIT_BEFORE 0x0001U
#define LHD_SPLIT_AFTER 0x0002U
#define LHD_PASSWORD 0x0004U
// Old style file comment embed into file header. Must not be used
// in new archives anymore.
#define LHD_COMMENT 0x0008U
// For non-file subheaders it denotes 'subblock having a parent file' flag.
#define LHD_SOLID 0x0010U
#define LHD_WINDOWMASK 0x00e0U
#define LHD_WINDOW64 0x0000U
#define LHD_WINDOW128 0x0020U
#define LHD_WINDOW256 0x0040U
#define LHD_WINDOW512 0x0060U
#define LHD_WINDOW1024 0x0080U
#define LHD_WINDOW2048 0x00a0U
#define LHD_WINDOW4096 0x00c0U
#define LHD_DIRECTORY 0x00e0U
#define LHD_LARGE 0x0100U
#define LHD_UNICODE 0x0200U
#define LHD_SALT 0x0400U
#define LHD_VERSION 0x0800U
#define LHD_EXTTIME 0x1000U
#define SKIP_IF_UNKNOWN 0x4000U
#define LONG_BLOCK 0x8000U
#define EARC_NEXT_VOLUME 0x0001U // Not last volume.
#define EARC_DATACRC 0x0002U // Store CRC32 of RAR archive (now is used only in volumes).
#define EARC_REVSPACE 0x0004U // Reserve space for end of REV file 7 byte record.
#define EARC_VOLNUMBER 0x0008U // Store a number of current volume.
enum HEADER_TYPE {
// RAR 5.0 header types.
HEAD_MARK=0x00, HEAD_MAIN=0x01, HEAD_FILE=0x02, HEAD_SERVICE=0x03,
HEAD_CRYPT=0x04, HEAD_ENDARC=0x05, HEAD_UNKNOWN=0xff,
// RAR 1.5 - 4.x header types.
HEAD3_MARK=0x72,HEAD3_MAIN=0x73,HEAD3_FILE=0x74,HEAD3_CMT=0x75,
HEAD3_AV=0x76,HEAD3_OLDSERVICE=0x77,HEAD3_PROTECT=0x78,HEAD3_SIGN=0x79,
HEAD3_SERVICE=0x7a,HEAD3_ENDARC=0x7b
};
// RAR 2.9 and earlier.
enum { EA_HEAD=0x100,UO_HEAD=0x101,MAC_HEAD=0x102,BEEA_HEAD=0x103,
NTACL_HEAD=0x104,STREAM_HEAD=0x105 };
// Internal implementation, depends on archive format version.
enum HOST_SYSTEM {
// RAR 5.0 host OS
HOST5_WINDOWS=0,HOST5_UNIX=1,
// RAR 3.0 host OS.
HOST_MSDOS=0,HOST_OS2=1,HOST_WIN32=2,HOST_UNIX=3,HOST_MACOS=4,
HOST_BEOS=5,HOST_MAX
};
// Unified archive format independent implementation.
enum HOST_SYSTEM_TYPE {
HSYS_WINDOWS, HSYS_UNIX, HSYS_UNKNOWN
};
// We also use these values in extra field, so do not modify them.
enum FILE_SYSTEM_REDIRECT {
FSREDIR_NONE=0, FSREDIR_UNIXSYMLINK, FSREDIR_WINSYMLINK, FSREDIR_JUNCTION,
FSREDIR_HARDLINK, FSREDIR_FILECOPY
};
#define SUBHEAD_TYPE_CMT L"CMT"
#define SUBHEAD_TYPE_QOPEN L"QO"
#define SUBHEAD_TYPE_ACL L"ACL"
#define SUBHEAD_TYPE_STREAM L"STM"
#define SUBHEAD_TYPE_UOWNER L"UOW"
#define SUBHEAD_TYPE_AV L"AV"
#define SUBHEAD_TYPE_RR L"RR"
#define SUBHEAD_TYPE_OS2EA L"EA2"
/* new file inherits a subblock when updating a host file */
#define SUBHEAD_FLAGS_INHERITED 0x80000000
#define SUBHEAD_FLAGS_CMT_UNICODE 0x00000001
struct MarkHeader
{
byte Mark[8];
// Following fields are virtual and not present in real blocks.
uint HeadSize;
};
struct BaseBlock
{
uint HeadCRC; // 'ushort' for RAR 1.5.
HEADER_TYPE HeaderType; // 1 byte for RAR 1.5.
uint Flags; // 'ushort' for RAR 1.5.
uint HeadSize; // 'ushort' for RAR 1.5, up to 2 MB for RAR 5.0.
bool SkipIfUnknown;
void Reset()
{
SkipIfUnknown=false;
}
};
struct BlockHeader:BaseBlock
{
uint DataSize;
};
struct MainHeader:BaseBlock
{
ushort HighPosAV;
uint PosAV;
bool CommentInHeader;
bool PackComment; // For RAR 1.4 archive format only.
bool Locator;
uint64 QOpenOffset; // Offset of quick list record.
uint64 QOpenMaxSize; // Maximum size of QOpen offset in locator extra field.
uint64 RROffset; // Offset of recovery record.
uint64 RRMaxSize; // Maximum size of RR offset in locator extra field.
void Reset();
};
struct FileHeader:BlockHeader
{
byte HostOS;
byte UnpVer;
byte Method;
union {
uint FileAttr;
uint SubFlags;
};
wchar FileName[NM];
Array<byte> SubData;
RarTime mtime;
RarTime ctime;
RarTime atime;
int64 PackSize;
int64 UnpSize;
int64 MaxSize; // Reserve size bytes for vint of this size.
HashValue FileHash;
uint FileFlags;
bool SplitBefore;
bool SplitAfter;
bool UnknownUnpSize;
bool Encrypted;
CRYPT_METHOD CryptMethod;
bool SaltSet;
byte Salt[SIZE_SALT50];
byte InitV[SIZE_INITV];
bool UsePswCheck;
byte PswCheck[SIZE_PSWCHECK];
// Use HMAC calculated from HashKey and checksum instead of plain checksum.
bool UseHashKey;
// Key to convert checksum to HMAC. Derived from password with PBKDF2
// using additional iterations.
byte HashKey[SHA256_DIGEST_SIZE];
uint Lg2Count; // Log2 of PBKDF2 repetition count.
bool Solid;
bool Dir;
bool CommentInHeader; // RAR 2.0 file comment.
bool Version; // name.ext;ver file name containing the version number.
size_t WinSize;
bool Inherited; // New file inherits a subblock when updating a host file (for subblocks only).
// 'true' if file sizes use 8 bytes instead of 4. Not used in RAR 5.0.
bool LargeFile;
// 'true' for HEAD_SERVICE block, which is a child of preceding file block.
// RAR 4.x uses 'solid' flag to indicate child subheader blocks in archives.
bool SubBlock;
HOST_SYSTEM_TYPE HSType;
FILE_SYSTEM_REDIRECT RedirType;
wchar RedirName[NM];
bool DirTarget;
bool UnixOwnerSet,UnixOwnerNumeric,UnixGroupNumeric;
char UnixOwnerName[256],UnixGroupName[256];
#ifdef _UNIX
uid_t UnixOwnerID;
gid_t UnixGroupID;
#else // Need these Unix fields in Windows too for 'list' command.
uint UnixOwnerID;
uint UnixGroupID;
#endif
void Reset(size_t SubDataSize=0);
bool CmpName(const wchar *Name)
{
return(wcscmp(FileName,Name)==0);
}
FileHeader& operator = (FileHeader &hd);
};
struct EndArcHeader:BaseBlock
{
// Optional CRC32 of entire archive up to start of EndArcHeader block.
// Present in RAR 4.x archives if EARC_DATACRC flag is set.
uint ArcDataCRC;
uint VolNumber; // Optional number of current volume.
// 7 additional zero bytes can be stored here if EARC_REVSPACE is set.
bool NextVolume; // Not last volume.
bool DataCRC;
bool RevSpace;
bool StoreVolNumber;
void Reset()
{
BaseBlock::Reset();
NextVolume=false;
DataCRC=false;
RevSpace=false;
StoreVolNumber=false;
}
};
struct CryptHeader:BaseBlock
{
bool UsePswCheck;
uint Lg2Count; // Log2 of PBKDF2 repetition count.
byte Salt[SIZE_SALT50];
byte PswCheck[SIZE_PSWCHECK];
};
// SubBlockHeader and its successors were used in RAR 2.x format.
// RAR 4.x uses FileHeader with HEAD_SERVICE HeaderType for subblocks.
struct SubBlockHeader:BlockHeader
{
ushort SubType;
byte Level;
};
struct CommentHeader:BaseBlock
{
ushort UnpSize;
byte UnpVer;
byte Method;
ushort CommCRC;
};
struct ProtectHeader:BlockHeader
{
byte Version;
ushort RecSectors;
uint TotalBlocks;
byte Mark[8];
};
struct UnixOwnersHeader:SubBlockHeader
{
ushort OwnerNameSize;
ushort GroupNameSize;
/* dummy */
char OwnerName[256];
char GroupName[256];
};
struct EAHeader:SubBlockHeader
{
uint UnpSize;
byte UnpVer;
byte Method;
uint EACRC;
};
struct StreamHeader:SubBlockHeader
{
uint UnpSize;
byte UnpVer;
byte Method;
uint StreamCRC;
ushort StreamNameSize;
char StreamName[260];
};
#endif |