1498 lines
46 KiB
C++
Vendored
1498 lines
46 KiB
C++
Vendored
#include "rar.hpp"
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size_t Archive::ReadHeader()
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{
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// Once we failed to decrypt an encrypted block, there is no reason to
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// attempt to do it further. We'll never be successful and only generate
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// endless errors.
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if (FailedHeaderDecryption)
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return 0;
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CurBlockPos=Tell();
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// Other developers asked us to initialize it to suppress "may be used
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// uninitialized" warning in code below in some compilers.
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size_t ReadSize=0;
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switch(Format)
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{
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#ifndef SFX_MODULE
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case RARFMT14:
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ReadSize=ReadHeader14();
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break;
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#endif
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case RARFMT15:
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ReadSize=ReadHeader15();
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break;
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case RARFMT50:
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ReadSize=ReadHeader50();
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break;
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}
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// It is important to check ReadSize>0 here, because it is normal
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// for RAR2 and RAR3 archives without end of archive block to have
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// NextBlockPos==CurBlockPos after the end of archive has reached.
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if (ReadSize>0 && NextBlockPos<=CurBlockPos)
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{
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BrokenHeaderMsg();
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ReadSize=0;
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}
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if (ReadSize==0)
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CurHeaderType=HEAD_UNKNOWN;
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return ReadSize;
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}
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size_t Archive::SearchBlock(HEADER_TYPE HeaderType)
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{
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size_t Size,Count=0;
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while ((Size=ReadHeader())!=0 &&
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(HeaderType==HEAD_ENDARC || GetHeaderType()!=HEAD_ENDARC))
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{
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if ((++Count & 127)==0)
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Wait();
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if (GetHeaderType()==HeaderType)
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return Size;
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SeekToNext();
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}
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return 0;
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}
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size_t Archive::SearchSubBlock(const wchar *Type)
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{
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size_t Size,Count=0;
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while ((Size=ReadHeader())!=0 && GetHeaderType()!=HEAD_ENDARC)
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{
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if ((++Count & 127)==0)
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Wait();
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if (GetHeaderType()==HEAD_SERVICE && SubHead.CmpName(Type))
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return Size;
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SeekToNext();
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}
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return 0;
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}
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size_t Archive::SearchRR()
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{
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// If locator extra field is available for recovery record, let's utilize it.
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if (MainHead.Locator && MainHead.RROffset!=0)
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{
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uint64 CurPos=Tell();
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Seek(MainHead.RROffset,SEEK_SET);
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size_t Size=ReadHeader();
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if (Size!=0 && !BrokenHeader && GetHeaderType()==HEAD_SERVICE && SubHead.CmpName(SUBHEAD_TYPE_RR))
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return Size;
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Seek(CurPos,SEEK_SET);
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}
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// Otherwise scan the entire archive to find the recovery record.
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return SearchSubBlock(SUBHEAD_TYPE_RR);
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}
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void Archive::UnexpEndArcMsg()
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{
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int64 ArcSize=FileLength();
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// If block positions are equal to file size, this is not an error.
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// It can happen when we reached the end of older RAR 1.5 archive,
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// which did not have the end of archive block.
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if (CurBlockPos!=ArcSize || NextBlockPos!=ArcSize)
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{
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uiMsg(UIERROR_UNEXPEOF,FileName);
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ErrHandler.SetErrorCode(RARX_WARNING);
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}
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}
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void Archive::BrokenHeaderMsg()
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{
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uiMsg(UIERROR_HEADERBROKEN,FileName);
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BrokenHeader=true;
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ErrHandler.SetErrorCode(RARX_CRC);
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}
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void Archive::UnkEncVerMsg(const wchar *Name,const wchar *Info)
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{
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uiMsg(UIERROR_UNKNOWNENCMETHOD,FileName,Name,Info);
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ErrHandler.SetErrorCode(RARX_WARNING);
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}
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// Return f in case of signed integer overflow or negative parameters
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// or v1+v2 otherwise. We use it for file offsets, which are signed
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// for compatibility with off_t in POSIX file functions and third party code.
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// Signed integer overflow is the undefined behavior according to
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// C++ standard and it causes fuzzers to complain.
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inline int64 SafeAdd(int64 v1,int64 v2,int64 f)
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{
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return v1>=0 && v2>=0 && v1<=MAX_INT64-v2 ? v1+v2 : f;
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}
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size_t Archive::ReadHeader15()
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{
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RawRead Raw(this);
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bool Decrypt=Encrypted && CurBlockPos>(int64)SFXSize+SIZEOF_MARKHEAD3;
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if (Decrypt)
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{
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#ifdef RAR_NOCRYPT // For rarext.dll and unrar_nocrypt.dll.
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return 0;
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#else
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RequestArcPassword();
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byte Salt[SIZE_SALT30];
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if (Read(Salt,SIZE_SALT30)!=SIZE_SALT30)
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{
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UnexpEndArcMsg();
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return 0;
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}
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HeadersCrypt.SetCryptKeys(false,CRYPT_RAR30,&Cmd->Password,Salt,NULL,0,NULL,NULL);
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Raw.SetCrypt(&HeadersCrypt);
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#endif
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}
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Raw.Read(SIZEOF_SHORTBLOCKHEAD);
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if (Raw.Size()==0)
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{
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UnexpEndArcMsg();
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return 0;
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}
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ShortBlock.HeadCRC=Raw.Get2();
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ShortBlock.Reset();
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uint HeaderType=Raw.Get1();
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ShortBlock.Flags=Raw.Get2();
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ShortBlock.SkipIfUnknown=(ShortBlock.Flags & SKIP_IF_UNKNOWN)!=0;
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ShortBlock.HeadSize=Raw.Get2();
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ShortBlock.HeaderType=(HEADER_TYPE)HeaderType;
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if (ShortBlock.HeadSize<SIZEOF_SHORTBLOCKHEAD)
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{
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BrokenHeaderMsg();
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return 0;
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}
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// For simpler further processing we map header types common
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// for RAR 1.5 and 5.0 formats to RAR 5.0 values. It does not include
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// header types specific for RAR 1.5 - 4.x only.
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switch(ShortBlock.HeaderType)
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{
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case HEAD3_MAIN: ShortBlock.HeaderType=HEAD_MAIN; break;
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case HEAD3_FILE: ShortBlock.HeaderType=HEAD_FILE; break;
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case HEAD3_SERVICE: ShortBlock.HeaderType=HEAD_SERVICE; break;
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case HEAD3_ENDARC: ShortBlock.HeaderType=HEAD_ENDARC; break;
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}
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CurHeaderType=ShortBlock.HeaderType;
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if (ShortBlock.HeaderType==HEAD3_CMT)
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{
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// Old style (up to RAR 2.9) comment header embedded into main
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// or file header. We must not read the entire ShortBlock.HeadSize here
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// to not break the comment processing logic later.
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Raw.Read(SIZEOF_COMMHEAD-SIZEOF_SHORTBLOCKHEAD);
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}
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else
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if (ShortBlock.HeaderType==HEAD_MAIN && (ShortBlock.Flags & MHD_COMMENT)!=0)
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{
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// Old style (up to RAR 2.9) main archive comment embedded into
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// the main archive header found. While we can read the entire
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// ShortBlock.HeadSize here and remove this part of "if", it would be
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// waste of memory, because we'll read and process this comment data
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// in other function anyway and we do not need them here now.
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Raw.Read(SIZEOF_MAINHEAD3-SIZEOF_SHORTBLOCKHEAD);
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}
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else
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Raw.Read(ShortBlock.HeadSize-SIZEOF_SHORTBLOCKHEAD);
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NextBlockPos=CurBlockPos+FullHeaderSize(ShortBlock.HeadSize);
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switch(ShortBlock.HeaderType)
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{
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case HEAD_MAIN:
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MainHead.Reset();
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*(BaseBlock *)&MainHead=ShortBlock;
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MainHead.HighPosAV=Raw.Get2();
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MainHead.PosAV=Raw.Get4();
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Volume=(MainHead.Flags & MHD_VOLUME)!=0;
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Solid=(MainHead.Flags & MHD_SOLID)!=0;
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Locked=(MainHead.Flags & MHD_LOCK)!=0;
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Protected=(MainHead.Flags & MHD_PROTECT)!=0;
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Encrypted=(MainHead.Flags & MHD_PASSWORD)!=0;
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Signed=MainHead.PosAV!=0 || MainHead.HighPosAV!=0;
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MainHead.CommentInHeader=(MainHead.Flags & MHD_COMMENT)!=0;
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// Only for encrypted 3.0+ archives. 2.x archives did not have this
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// flag, so for non-encrypted archives, we'll set it later based on
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// file attributes.
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FirstVolume=(MainHead.Flags & MHD_FIRSTVOLUME)!=0;
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NewNumbering=(MainHead.Flags & MHD_NEWNUMBERING)!=0;
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break;
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case HEAD_FILE:
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case HEAD_SERVICE:
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{
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bool FileBlock=ShortBlock.HeaderType==HEAD_FILE;
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FileHeader *hd=FileBlock ? &FileHead:&SubHead;
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hd->Reset();
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*(BaseBlock *)hd=ShortBlock;
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hd->SplitBefore=(hd->Flags & LHD_SPLIT_BEFORE)!=0;
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hd->SplitAfter=(hd->Flags & LHD_SPLIT_AFTER)!=0;
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hd->Encrypted=(hd->Flags & LHD_PASSWORD)!=0;
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hd->SaltSet=(hd->Flags & LHD_SALT)!=0;
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hd->Solid=FileBlock && (hd->Flags & LHD_SOLID)!=0;
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hd->SubBlock=!FileBlock && (hd->Flags & LHD_SOLID)!=0;
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hd->Dir=(hd->Flags & LHD_WINDOWMASK)==LHD_DIRECTORY;
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hd->WinSize=hd->Dir ? 0:0x10000<<((hd->Flags & LHD_WINDOWMASK)>>5);
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hd->CommentInHeader=(hd->Flags & LHD_COMMENT)!=0;
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hd->Version=(hd->Flags & LHD_VERSION)!=0;
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hd->DataSize=Raw.Get4();
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uint LowUnpSize=Raw.Get4();
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hd->HostOS=Raw.Get1();
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hd->FileHash.Type=HASH_CRC32;
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hd->FileHash.CRC32=Raw.Get4();
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uint FileTime=Raw.Get4();
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hd->UnpVer=Raw.Get1();
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hd->Method=Raw.Get1()-0x30;
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size_t NameSize=Raw.Get2();
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hd->FileAttr=Raw.Get4();
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// RAR15 did not use the special dictionary size to mark dirs.
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if (hd->UnpVer<20 && (hd->FileAttr & 0x10)!=0)
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hd->Dir=true;
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hd->CryptMethod=CRYPT_NONE;
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if (hd->Encrypted)
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switch(hd->UnpVer)
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{
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case 13: hd->CryptMethod=CRYPT_RAR13; break;
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case 15: hd->CryptMethod=CRYPT_RAR15; break;
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case 20:
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case 26: hd->CryptMethod=CRYPT_RAR20; break;
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default: hd->CryptMethod=CRYPT_RAR30; break;
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}
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hd->HSType=HSYS_UNKNOWN;
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if (hd->HostOS==HOST_UNIX || hd->HostOS==HOST_BEOS)
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hd->HSType=HSYS_UNIX;
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else
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if (hd->HostOS<HOST_MAX)
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hd->HSType=HSYS_WINDOWS;
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hd->RedirType=FSREDIR_NONE;
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// RAR 4.x Unix symlink.
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if (hd->HostOS==HOST_UNIX && (hd->FileAttr & 0xF000)==0xA000)
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{
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hd->RedirType=FSREDIR_UNIXSYMLINK;
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*hd->RedirName=0;
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}
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hd->Inherited=!FileBlock && (hd->SubFlags & SUBHEAD_FLAGS_INHERITED)!=0;
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hd->LargeFile=(hd->Flags & LHD_LARGE)!=0;
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uint HighPackSize,HighUnpSize;
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if (hd->LargeFile)
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{
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HighPackSize=Raw.Get4();
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HighUnpSize=Raw.Get4();
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hd->UnknownUnpSize=(LowUnpSize==0xffffffff && HighUnpSize==0xffffffff);
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}
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else
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{
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HighPackSize=HighUnpSize=0;
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// UnpSize equal to 0xffffffff without LHD_LARGE flag indicates
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// that we do not know the unpacked file size and must unpack it
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// until we find the end of file marker in compressed data.
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hd->UnknownUnpSize=(LowUnpSize==0xffffffff);
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}
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hd->PackSize=INT32TO64(HighPackSize,hd->DataSize);
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hd->UnpSize=INT32TO64(HighUnpSize,LowUnpSize);
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if (hd->UnknownUnpSize)
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hd->UnpSize=INT64NDF;
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char FileName[NM*4];
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size_t ReadNameSize=Min(NameSize,ASIZE(FileName)-1);
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Raw.GetB((byte *)FileName,ReadNameSize);
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FileName[ReadNameSize]=0;
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if (FileBlock)
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{
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*hd->FileName=0;
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if ((hd->Flags & LHD_UNICODE)!=0)
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{
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EncodeFileName NameCoder;
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size_t Length=strlen(FileName);
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Length++;
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if (ReadNameSize>Length)
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NameCoder.Decode(FileName,ReadNameSize,(byte *)FileName+Length,
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ReadNameSize-Length,hd->FileName,
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ASIZE(hd->FileName));
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}
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if (*hd->FileName==0)
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ArcCharToWide(FileName,hd->FileName,ASIZE(hd->FileName),ACTW_OEM);
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#ifndef SFX_MODULE
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ConvertNameCase(hd->FileName);
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#endif
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ConvertFileHeader(hd);
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}
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else
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{
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CharToWide(FileName,hd->FileName,ASIZE(hd->FileName));
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// Calculate the size of optional data.
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int DataSize=int(hd->HeadSize-NameSize-SIZEOF_FILEHEAD3);
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if ((hd->Flags & LHD_SALT)!=0)
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DataSize-=SIZE_SALT30;
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if (DataSize>0)
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{
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// Here we read optional additional fields for subheaders.
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// They are stored after the file name and before salt.
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hd->SubData.Alloc(DataSize);
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Raw.GetB(&hd->SubData[0],DataSize);
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}
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if (hd->CmpName(SUBHEAD_TYPE_CMT))
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MainComment=true;
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}
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if ((hd->Flags & LHD_SALT)!=0)
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Raw.GetB(hd->Salt,SIZE_SALT30);
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hd->mtime.SetDos(FileTime);
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if ((hd->Flags & LHD_EXTTIME)!=0)
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{
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ushort Flags=Raw.Get2();
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RarTime *tbl[4];
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tbl[0]=&FileHead.mtime;
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tbl[1]=&FileHead.ctime;
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tbl[2]=&FileHead.atime;
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tbl[3]=NULL; // Archive time is not used now.
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for (int I=0;I<4;I++)
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{
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RarTime *CurTime=tbl[I];
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uint rmode=Flags>>(3-I)*4;
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if ((rmode & 8)==0 || CurTime==NULL)
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continue;
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if (I!=0)
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{
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uint DosTime=Raw.Get4();
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CurTime->SetDos(DosTime);
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}
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RarLocalTime rlt;
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CurTime->GetLocal(&rlt);
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if (rmode & 4)
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rlt.Second++;
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rlt.Reminder=0;
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uint count=rmode&3;
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for (uint J=0;J<count;J++)
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{
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byte CurByte=Raw.Get1();
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rlt.Reminder|=(((uint)CurByte)<<((J+3-count)*8));
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}
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// Convert from 100ns RAR precision to REMINDER_PRECISION.
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rlt.Reminder*=RarTime::REMINDER_PRECISION/10000000;
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CurTime->SetLocal(&rlt);
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}
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}
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// Set to 0 in case of overflow, so end of ReadHeader cares about it.
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NextBlockPos=SafeAdd(NextBlockPos,hd->PackSize,0);
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bool CRCProcessedOnly=hd->CommentInHeader;
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ushort HeaderCRC=Raw.GetCRC15(CRCProcessedOnly);
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if (hd->HeadCRC!=HeaderCRC)
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{
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BrokenHeader=true;
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ErrHandler.SetErrorCode(RARX_WARNING);
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|
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// If we have a broken encrypted header, we do not need to display
|
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// the error message here, because it will be displayed for such
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// headers later in this function. Also such headers are unlikely
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// to have anything sensible in file name field, so it is useless
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// to display the file name.
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if (!Decrypt)
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uiMsg(UIERROR_FHEADERBROKEN,Archive::FileName,hd->FileName);
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}
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}
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break;
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case HEAD_ENDARC:
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*(BaseBlock *)&EndArcHead=ShortBlock;
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EndArcHead.NextVolume=(EndArcHead.Flags & EARC_NEXT_VOLUME)!=0;
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EndArcHead.DataCRC=(EndArcHead.Flags & EARC_DATACRC)!=0;
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EndArcHead.RevSpace=(EndArcHead.Flags & EARC_REVSPACE)!=0;
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EndArcHead.StoreVolNumber=(EndArcHead.Flags & EARC_VOLNUMBER)!=0;
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if (EndArcHead.DataCRC)
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EndArcHead.ArcDataCRC=Raw.Get4();
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if (EndArcHead.StoreVolNumber)
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VolNumber=EndArcHead.VolNumber=Raw.Get2();
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break;
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#ifndef SFX_MODULE
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case HEAD3_CMT:
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*(BaseBlock *)&CommHead=ShortBlock;
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CommHead.UnpSize=Raw.Get2();
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CommHead.UnpVer=Raw.Get1();
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CommHead.Method=Raw.Get1();
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CommHead.CommCRC=Raw.Get2();
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break;
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case HEAD3_PROTECT:
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*(BaseBlock *)&ProtectHead=ShortBlock;
|
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ProtectHead.DataSize=Raw.Get4();
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ProtectHead.Version=Raw.Get1();
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ProtectHead.RecSectors=Raw.Get2();
|
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ProtectHead.TotalBlocks=Raw.Get4();
|
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Raw.GetB(ProtectHead.Mark,8);
|
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NextBlockPos+=ProtectHead.DataSize;
|
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break;
|
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case HEAD3_OLDSERVICE: // RAR 2.9 and earlier.
|
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*(BaseBlock *)&SubBlockHead=ShortBlock;
|
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SubBlockHead.DataSize=Raw.Get4();
|
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NextBlockPos+=SubBlockHead.DataSize;
|
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SubBlockHead.SubType=Raw.Get2();
|
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SubBlockHead.Level=Raw.Get1();
|
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switch(SubBlockHead.SubType)
|
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{
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|
case UO_HEAD:
|
|
*(SubBlockHeader *)&UOHead=SubBlockHead;
|
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UOHead.OwnerNameSize=Raw.Get2();
|
|
UOHead.GroupNameSize=Raw.Get2();
|
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if (UOHead.OwnerNameSize>=ASIZE(UOHead.OwnerName))
|
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UOHead.OwnerNameSize=ASIZE(UOHead.OwnerName)-1;
|
|
if (UOHead.GroupNameSize>=ASIZE(UOHead.GroupName))
|
|
UOHead.GroupNameSize=ASIZE(UOHead.GroupName)-1;
|
|
Raw.GetB(UOHead.OwnerName,UOHead.OwnerNameSize);
|
|
Raw.GetB(UOHead.GroupName,UOHead.GroupNameSize);
|
|
UOHead.OwnerName[UOHead.OwnerNameSize]=0;
|
|
UOHead.GroupName[UOHead.GroupNameSize]=0;
|
|
break;
|
|
case NTACL_HEAD:
|
|
*(SubBlockHeader *)&EAHead=SubBlockHead;
|
|
EAHead.UnpSize=Raw.Get4();
|
|
EAHead.UnpVer=Raw.Get1();
|
|
EAHead.Method=Raw.Get1();
|
|
EAHead.EACRC=Raw.Get4();
|
|
break;
|
|
case STREAM_HEAD:
|
|
*(SubBlockHeader *)&StreamHead=SubBlockHead;
|
|
StreamHead.UnpSize=Raw.Get4();
|
|
StreamHead.UnpVer=Raw.Get1();
|
|
StreamHead.Method=Raw.Get1();
|
|
StreamHead.StreamCRC=Raw.Get4();
|
|
StreamHead.StreamNameSize=Raw.Get2();
|
|
if (StreamHead.StreamNameSize>=ASIZE(StreamHead.StreamName))
|
|
StreamHead.StreamNameSize=ASIZE(StreamHead.StreamName)-1;
|
|
Raw.GetB(StreamHead.StreamName,StreamHead.StreamNameSize);
|
|
StreamHead.StreamName[StreamHead.StreamNameSize]=0;
|
|
break;
|
|
}
|
|
break;
|
|
#endif
|
|
default:
|
|
if (ShortBlock.Flags & LONG_BLOCK)
|
|
NextBlockPos+=Raw.Get4();
|
|
break;
|
|
}
|
|
|
|
ushort HeaderCRC=Raw.GetCRC15(false);
|
|
|
|
// Old AV header does not have header CRC properly set.
|
|
if (ShortBlock.HeadCRC!=HeaderCRC && ShortBlock.HeaderType!=HEAD3_SIGN &&
|
|
ShortBlock.HeaderType!=HEAD3_AV)
|
|
{
|
|
bool Recovered=false;
|
|
if (ShortBlock.HeaderType==HEAD_ENDARC && EndArcHead.RevSpace)
|
|
{
|
|
// Last 7 bytes of recovered volume can contain zeroes, because
|
|
// REV files store its own information (volume number, etc.) here.
|
|
int64 Length=Tell();
|
|
Seek(Length-7,SEEK_SET);
|
|
Recovered=true;
|
|
for (int J=0;J<7;J++)
|
|
if (GetByte()!=0)
|
|
Recovered=false;
|
|
}
|
|
if (!Recovered)
|
|
{
|
|
BrokenHeader=true;
|
|
ErrHandler.SetErrorCode(RARX_CRC);
|
|
|
|
if (Decrypt)
|
|
{
|
|
uiMsg(UIERROR_CHECKSUMENC,FileName,FileName);
|
|
FailedHeaderDecryption=true;
|
|
return 0;
|
|
}
|
|
}
|
|
}
|
|
|
|
return Raw.Size();
|
|
}
|
|
|
|
|
|
size_t Archive::ReadHeader50()
|
|
{
|
|
RawRead Raw(this);
|
|
|
|
bool Decrypt=Encrypted && CurBlockPos>(int64)SFXSize+SIZEOF_MARKHEAD5;
|
|
|
|
if (Decrypt)
|
|
{
|
|
#if defined(RAR_NOCRYPT)
|
|
return 0;
|
|
#else
|
|
|
|
if (Cmd->SkipEncrypted)
|
|
{
|
|
uiMsg(UIMSG_SKIPENCARC,FileName);
|
|
FailedHeaderDecryption=true; // Suppress error messages and quit quietly.
|
|
return 0;
|
|
}
|
|
|
|
byte HeadersInitV[SIZE_INITV];
|
|
if (Read(HeadersInitV,SIZE_INITV)!=SIZE_INITV)
|
|
{
|
|
UnexpEndArcMsg();
|
|
return 0;
|
|
}
|
|
|
|
// We repeat the password request only for manually entered passwords
|
|
// and not for -p<pwd>. Wrong password can be intentionally provided
|
|
// in -p<pwd> to not stop batch processing for encrypted archives.
|
|
bool GlobalPassword=Cmd->Password.IsSet() || uiIsGlobalPasswordSet();
|
|
|
|
while (true) // Repeat the password prompt for wrong passwords.
|
|
{
|
|
RequestArcPassword();
|
|
|
|
byte PswCheck[SIZE_PSWCHECK];
|
|
HeadersCrypt.SetCryptKeys(false,CRYPT_RAR50,&Cmd->Password,CryptHead.Salt,HeadersInitV,CryptHead.Lg2Count,NULL,PswCheck);
|
|
// Verify password validity.
|
|
if (CryptHead.UsePswCheck && memcmp(PswCheck,CryptHead.PswCheck,SIZE_PSWCHECK)!=0)
|
|
{
|
|
if (GlobalPassword) // For -p<pwd> or Ctrl+P.
|
|
{
|
|
// This message is used by Android GUI to reset cached passwords.
|
|
// Update appropriate code if changed.
|
|
uiMsg(UIERROR_BADPSW,FileName,FileName);
|
|
FailedHeaderDecryption=true;
|
|
ErrHandler.SetErrorCode(RARX_BADPWD);
|
|
return 0;
|
|
}
|
|
else // For passwords entered manually.
|
|
{
|
|
// This message is used by Android GUI and Windows GUI and SFX to
|
|
// reset cached passwords. Update appropriate code if changed.
|
|
uiMsg(UIWAIT_BADPSW,FileName,FileName);
|
|
Cmd->Password.Clean();
|
|
}
|
|
|
|
#ifdef RARDLL
|
|
// Avoid new requests for unrar.dll to prevent the infinite loop
|
|
// if app always returns the same password.
|
|
ErrHandler.SetErrorCode(RARX_BADPWD);
|
|
Cmd->DllError=ERAR_BAD_PASSWORD;
|
|
ErrHandler.Exit(RARX_BADPWD);
|
|
#else
|
|
continue; // Request a password again.
|
|
#endif
|
|
}
|
|
break;
|
|
}
|
|
|
|
Raw.SetCrypt(&HeadersCrypt);
|
|
#endif
|
|
}
|
|
|
|
// Header size must not occupy more than 3 variable length integer bytes
|
|
// resulting in 2 MB maximum header size (MAX_HEADER_SIZE_RAR5),
|
|
// so here we read 4 byte CRC32 followed by 3 bytes or less of header size.
|
|
const size_t FirstReadSize=7; // Smallest possible block size.
|
|
if (Raw.Read(FirstReadSize)<FirstReadSize)
|
|
{
|
|
UnexpEndArcMsg();
|
|
return 0;
|
|
}
|
|
|
|
ShortBlock.Reset();
|
|
ShortBlock.HeadCRC=Raw.Get4();
|
|
uint SizeBytes=Raw.GetVSize(4);
|
|
uint64 BlockSize=Raw.GetV();
|
|
|
|
if (BlockSize==0 || SizeBytes==0)
|
|
{
|
|
BrokenHeaderMsg();
|
|
return 0;
|
|
}
|
|
|
|
int SizeToRead=int(BlockSize);
|
|
SizeToRead-=FirstReadSize-SizeBytes-4; // Adjust overread size bytes if any.
|
|
uint HeaderSize=4+SizeBytes+(uint)BlockSize;
|
|
|
|
if (SizeToRead<0 || HeaderSize<SIZEOF_SHORTBLOCKHEAD5)
|
|
{
|
|
BrokenHeaderMsg();
|
|
return 0;
|
|
}
|
|
|
|
Raw.Read(SizeToRead);
|
|
|
|
if (Raw.Size()<HeaderSize)
|
|
{
|
|
UnexpEndArcMsg();
|
|
return 0;
|
|
}
|
|
|
|
uint HeaderCRC=Raw.GetCRC50();
|
|
|
|
ShortBlock.HeaderType=(HEADER_TYPE)Raw.GetV();
|
|
ShortBlock.Flags=(uint)Raw.GetV();
|
|
ShortBlock.SkipIfUnknown=(ShortBlock.Flags & HFL_SKIPIFUNKNOWN)!=0;
|
|
ShortBlock.HeadSize=HeaderSize;
|
|
|
|
CurHeaderType=ShortBlock.HeaderType;
|
|
|
|
bool BadCRC=(ShortBlock.HeadCRC!=HeaderCRC);
|
|
if (BadCRC)
|
|
{
|
|
BrokenHeaderMsg(); // Report, but attempt to process.
|
|
|
|
BrokenHeader=true;
|
|
ErrHandler.SetErrorCode(RARX_CRC);
|
|
|
|
if (Decrypt)
|
|
{
|
|
uiMsg(UIERROR_CHECKSUMENC,FileName,FileName);
|
|
FailedHeaderDecryption=true;
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
uint64 ExtraSize=0;
|
|
if ((ShortBlock.Flags & HFL_EXTRA)!=0)
|
|
{
|
|
ExtraSize=Raw.GetV();
|
|
if (ExtraSize>=ShortBlock.HeadSize)
|
|
{
|
|
BrokenHeaderMsg();
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
uint64 DataSize=0;
|
|
if ((ShortBlock.Flags & HFL_DATA)!=0)
|
|
DataSize=Raw.GetV();
|
|
|
|
NextBlockPos=CurBlockPos+FullHeaderSize(ShortBlock.HeadSize);
|
|
// Set to 0 in case of overflow, so end of ReadHeader cares about it.
|
|
NextBlockPos=SafeAdd(NextBlockPos,DataSize,0);
|
|
|
|
switch(ShortBlock.HeaderType)
|
|
{
|
|
case HEAD_CRYPT:
|
|
{
|
|
*(BaseBlock *)&CryptHead=ShortBlock;
|
|
uint CryptVersion=(uint)Raw.GetV();
|
|
if (CryptVersion>CRYPT_VERSION)
|
|
{
|
|
wchar Info[20];
|
|
swprintf(Info,ASIZE(Info),L"h%u",CryptVersion);
|
|
UnkEncVerMsg(FileName,Info);
|
|
return 0;
|
|
}
|
|
uint EncFlags=(uint)Raw.GetV();
|
|
CryptHead.UsePswCheck=(EncFlags & CHFL_CRYPT_PSWCHECK)!=0;
|
|
CryptHead.Lg2Count=Raw.Get1();
|
|
if (CryptHead.Lg2Count>CRYPT5_KDF_LG2_COUNT_MAX)
|
|
{
|
|
wchar Info[20];
|
|
swprintf(Info,ASIZE(Info),L"hc%u",CryptHead.Lg2Count);
|
|
UnkEncVerMsg(FileName,Info);
|
|
return 0;
|
|
}
|
|
|
|
Raw.GetB(CryptHead.Salt,SIZE_SALT50);
|
|
if (CryptHead.UsePswCheck)
|
|
{
|
|
Raw.GetB(CryptHead.PswCheck,SIZE_PSWCHECK);
|
|
|
|
byte csum[SIZE_PSWCHECK_CSUM];
|
|
Raw.GetB(csum,SIZE_PSWCHECK_CSUM);
|
|
|
|
sha256_context ctx;
|
|
sha256_init(&ctx);
|
|
sha256_process(&ctx, CryptHead.PswCheck, SIZE_PSWCHECK);
|
|
|
|
byte Digest[SHA256_DIGEST_SIZE];
|
|
sha256_done(&ctx, Digest);
|
|
|
|
CryptHead.UsePswCheck=memcmp(csum,Digest,SIZE_PSWCHECK_CSUM)==0;
|
|
}
|
|
Encrypted=true;
|
|
}
|
|
break;
|
|
case HEAD_MAIN:
|
|
{
|
|
MainHead.Reset();
|
|
*(BaseBlock *)&MainHead=ShortBlock;
|
|
uint ArcFlags=(uint)Raw.GetV();
|
|
|
|
Volume=(ArcFlags & MHFL_VOLUME)!=0;
|
|
Solid=(ArcFlags & MHFL_SOLID)!=0;
|
|
Locked=(ArcFlags & MHFL_LOCK)!=0;
|
|
Protected=(ArcFlags & MHFL_PROTECT)!=0;
|
|
Signed=false;
|
|
NewNumbering=true;
|
|
|
|
if ((ArcFlags & MHFL_VOLNUMBER)!=0)
|
|
VolNumber=(uint)Raw.GetV();
|
|
else
|
|
VolNumber=0;
|
|
FirstVolume=Volume && VolNumber==0;
|
|
|
|
if (ExtraSize!=0)
|
|
ProcessExtra50(&Raw,(size_t)ExtraSize,&MainHead);
|
|
|
|
#ifdef USE_QOPEN
|
|
if (!ProhibitQOpen && MainHead.Locator && MainHead.QOpenOffset>0 && Cmd->QOpenMode!=QOPEN_NONE)
|
|
{
|
|
// We seek to QO block in the end of archive when processing
|
|
// QOpen.Load, so we need to preserve current block positions
|
|
// to not break normal archive processing by calling function.
|
|
int64 SaveCurBlockPos=CurBlockPos,SaveNextBlockPos=NextBlockPos;
|
|
HEADER_TYPE SaveCurHeaderType=CurHeaderType;
|
|
|
|
QOpen.Init(this,false);
|
|
QOpen.Load(MainHead.QOpenOffset);
|
|
|
|
CurBlockPos=SaveCurBlockPos;
|
|
NextBlockPos=SaveNextBlockPos;
|
|
CurHeaderType=SaveCurHeaderType;
|
|
}
|
|
#endif
|
|
}
|
|
break;
|
|
case HEAD_FILE:
|
|
case HEAD_SERVICE:
|
|
{
|
|
FileHeader *hd=ShortBlock.HeaderType==HEAD_FILE ? &FileHead:&SubHead;
|
|
hd->Reset(); // Clear hash, time fields and other stuff like flags.
|
|
*(BaseBlock *)hd=ShortBlock;
|
|
|
|
bool FileBlock=ShortBlock.HeaderType==HEAD_FILE;
|
|
|
|
hd->LargeFile=true;
|
|
|
|
hd->PackSize=DataSize;
|
|
hd->FileFlags=(uint)Raw.GetV();
|
|
hd->UnpSize=Raw.GetV();
|
|
|
|
hd->UnknownUnpSize=(hd->FileFlags & FHFL_UNPUNKNOWN)!=0;
|
|
if (hd->UnknownUnpSize)
|
|
hd->UnpSize=INT64NDF;
|
|
|
|
hd->MaxSize=Max(hd->PackSize,hd->UnpSize);
|
|
hd->FileAttr=(uint)Raw.GetV();
|
|
if ((hd->FileFlags & FHFL_UTIME)!=0)
|
|
hd->mtime.SetUnix((time_t)Raw.Get4());
|
|
|
|
hd->FileHash.Type=HASH_NONE;
|
|
if ((hd->FileFlags & FHFL_CRC32)!=0)
|
|
{
|
|
hd->FileHash.Type=HASH_CRC32;
|
|
hd->FileHash.CRC32=Raw.Get4();
|
|
}
|
|
|
|
hd->RedirType=FSREDIR_NONE;
|
|
|
|
uint CompInfo=(uint)Raw.GetV();
|
|
hd->Method=(CompInfo>>7) & 7;
|
|
|
|
// "+ 50" to not mix with old RAR format algorithms. For example,
|
|
// we may need to use the compression algorithm 15 in the future,
|
|
// but it was already used in RAR 1.5 and Unpack needs to distinguish
|
|
// them.
|
|
hd->UnpVer=(CompInfo & 0x3f) + 50;
|
|
if (hd->UnpVer!=50) // Only 5.0 compression is known now.
|
|
hd->UnpVer=VER_UNKNOWN;
|
|
|
|
hd->HostOS=(byte)Raw.GetV();
|
|
size_t NameSize=(size_t)Raw.GetV();
|
|
hd->Inherited=(ShortBlock.Flags & HFL_INHERITED)!=0;
|
|
|
|
hd->HSType=HSYS_UNKNOWN;
|
|
if (hd->HostOS==HOST5_UNIX)
|
|
hd->HSType=HSYS_UNIX;
|
|
else
|
|
if (hd->HostOS==HOST5_WINDOWS)
|
|
hd->HSType=HSYS_WINDOWS;
|
|
|
|
hd->SplitBefore=(hd->Flags & HFL_SPLITBEFORE)!=0;
|
|
hd->SplitAfter=(hd->Flags & HFL_SPLITAFTER)!=0;
|
|
hd->SubBlock=(hd->Flags & HFL_CHILD)!=0;
|
|
hd->Solid=FileBlock && (CompInfo & FCI_SOLID)!=0;
|
|
hd->Dir=(hd->FileFlags & FHFL_DIRECTORY)!=0;
|
|
hd->WinSize=hd->Dir ? 0:size_t(0x20000)<<((CompInfo>>10)&0xf);
|
|
|
|
hd->CryptMethod=hd->Encrypted ? CRYPT_RAR50:CRYPT_NONE;
|
|
|
|
char FileName[NM*4];
|
|
size_t ReadNameSize=Min(NameSize,ASIZE(FileName)-1);
|
|
Raw.GetB((byte *)FileName,ReadNameSize);
|
|
FileName[ReadNameSize]=0;
|
|
|
|
UtfToWide(FileName,hd->FileName,ASIZE(hd->FileName));
|
|
|
|
// Should do it before converting names, because extra fields can
|
|
// affect name processing, like in case of NTFS streams.
|
|
if (ExtraSize!=0)
|
|
ProcessExtra50(&Raw,(size_t)ExtraSize,hd);
|
|
|
|
if (FileBlock)
|
|
{
|
|
#ifndef SFX_MODULE
|
|
ConvertNameCase(hd->FileName);
|
|
#endif
|
|
ConvertFileHeader(hd);
|
|
}
|
|
|
|
if (!FileBlock && hd->CmpName(SUBHEAD_TYPE_CMT))
|
|
MainComment=true;
|
|
|
|
#if 0
|
|
// For RAR5 format we read the user specified recovery percent here.
|
|
// It would be useful to do it for shell extension too, so we display
|
|
// the correct recovery record size in archive properties. But then
|
|
// we would need to include the entire recovery record processing
|
|
// code to shell extension, which is not done now.
|
|
if (!FileBlock && hd->CmpName(SUBHEAD_TYPE_RR) && hd->SubData.Size()>0)
|
|
{
|
|
// It is stored as a single byte up to RAR 6.02 and as vint since
|
|
// 6.10, where we extended the maximum RR size from 99% to 1000%.
|
|
RawRead RawPercent;
|
|
RawPercent.Read(&hd->SubData[0],hd->SubData.Size());
|
|
RecoveryPercent=(int)RawPercent.GetV();
|
|
|
|
RSBlockHeader Header;
|
|
GetRRInfo(this,&Header);
|
|
RecoverySize=Header.RecSectionSize*Header.RecCount;
|
|
}
|
|
#endif
|
|
|
|
if (BadCRC) // Add the file name to broken header message displayed above.
|
|
uiMsg(UIERROR_FHEADERBROKEN,Archive::FileName,hd->FileName);
|
|
}
|
|
break;
|
|
case HEAD_ENDARC:
|
|
{
|
|
*(BaseBlock *)&EndArcHead=ShortBlock;
|
|
uint ArcFlags=(uint)Raw.GetV();
|
|
EndArcHead.NextVolume=(ArcFlags & EHFL_NEXTVOLUME)!=0;
|
|
EndArcHead.StoreVolNumber=false;
|
|
EndArcHead.DataCRC=false;
|
|
EndArcHead.RevSpace=false;
|
|
}
|
|
break;
|
|
}
|
|
|
|
return Raw.Size();
|
|
}
|
|
|
|
|
|
#if !defined(RAR_NOCRYPT)
|
|
void Archive::RequestArcPassword()
|
|
{
|
|
if (!Cmd->Password.IsSet())
|
|
{
|
|
#ifdef RARDLL
|
|
if (Cmd->Callback!=NULL)
|
|
{
|
|
wchar PasswordW[MAXPASSWORD];
|
|
*PasswordW=0;
|
|
if (Cmd->Callback(UCM_NEEDPASSWORDW,Cmd->UserData,(LPARAM)PasswordW,ASIZE(PasswordW))==-1)
|
|
*PasswordW=0;
|
|
if (*PasswordW==0)
|
|
{
|
|
char PasswordA[MAXPASSWORD];
|
|
*PasswordA=0;
|
|
if (Cmd->Callback(UCM_NEEDPASSWORD,Cmd->UserData,(LPARAM)PasswordA,ASIZE(PasswordA))==-1)
|
|
*PasswordA=0;
|
|
GetWideName(PasswordA,NULL,PasswordW,ASIZE(PasswordW));
|
|
cleandata(PasswordA,sizeof(PasswordA));
|
|
}
|
|
Cmd->Password.Set(PasswordW);
|
|
cleandata(PasswordW,sizeof(PasswordW));
|
|
}
|
|
if (!Cmd->Password.IsSet())
|
|
{
|
|
Close();
|
|
Cmd->DllError=ERAR_MISSING_PASSWORD;
|
|
ErrHandler.Exit(RARX_USERBREAK);
|
|
}
|
|
#else
|
|
if (!uiGetPassword(UIPASSWORD_ARCHIVE,FileName,&Cmd->Password))
|
|
{
|
|
Close();
|
|
uiMsg(UIERROR_INCERRCOUNT); // Prevent archive deleting if delete after extraction is on.
|
|
ErrHandler.Exit(RARX_USERBREAK);
|
|
}
|
|
#endif
|
|
Cmd->ManualPassword=true;
|
|
}
|
|
}
|
|
#endif
|
|
|
|
|
|
void Archive::ProcessExtra50(RawRead *Raw,size_t ExtraSize,BaseBlock *bb)
|
|
{
|
|
// Read extra data from the end of block skipping any fields before it.
|
|
size_t ExtraStart=Raw->Size()-ExtraSize;
|
|
if (ExtraStart<Raw->GetPos())
|
|
return;
|
|
Raw->SetPos(ExtraStart);
|
|
while (Raw->DataLeft()>=2)
|
|
{
|
|
int64 FieldSize=Raw->GetV(); // Needs to be signed for check below and can be negative.
|
|
if (FieldSize<=0 || Raw->DataLeft()==0 || FieldSize>(int64)Raw->DataLeft())
|
|
break;
|
|
size_t NextPos=size_t(Raw->GetPos()+FieldSize);
|
|
uint64 FieldType=Raw->GetV();
|
|
|
|
FieldSize=int64(NextPos-Raw->GetPos()); // Field size without size and type fields.
|
|
|
|
if (FieldSize<0) // FieldType is longer than expected extra field size.
|
|
break;
|
|
|
|
if (bb->HeaderType==HEAD_MAIN)
|
|
{
|
|
MainHeader *hd=(MainHeader *)bb;
|
|
if (FieldType==MHEXTRA_LOCATOR)
|
|
{
|
|
hd->Locator=true;
|
|
uint Flags=(uint)Raw->GetV();
|
|
if ((Flags & MHEXTRA_LOCATOR_QLIST)!=0)
|
|
{
|
|
uint64 Offset=Raw->GetV();
|
|
if (Offset!=0) // 0 means that reserved space was not enough to write the offset.
|
|
hd->QOpenOffset=Offset+CurBlockPos;
|
|
}
|
|
if ((Flags & MHEXTRA_LOCATOR_RR)!=0)
|
|
{
|
|
uint64 Offset=Raw->GetV();
|
|
if (Offset!=0) // 0 means that reserved space was not enough to write the offset.
|
|
hd->RROffset=Offset+CurBlockPos;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (bb->HeaderType==HEAD_FILE || bb->HeaderType==HEAD_SERVICE)
|
|
{
|
|
FileHeader *hd=(FileHeader *)bb;
|
|
switch(FieldType)
|
|
{
|
|
case FHEXTRA_CRYPT:
|
|
{
|
|
FileHeader *hd=(FileHeader *)bb;
|
|
uint EncVersion=(uint)Raw->GetV();
|
|
if (EncVersion>CRYPT_VERSION)
|
|
{
|
|
wchar Info[20];
|
|
swprintf(Info,ASIZE(Info),L"x%u",EncVersion);
|
|
UnkEncVerMsg(hd->FileName,Info);
|
|
}
|
|
else
|
|
{
|
|
uint Flags=(uint)Raw->GetV();
|
|
hd->UsePswCheck=(Flags & FHEXTRA_CRYPT_PSWCHECK)!=0;
|
|
hd->UseHashKey=(Flags & FHEXTRA_CRYPT_HASHMAC)!=0;
|
|
hd->Lg2Count=Raw->Get1();
|
|
if (hd->Lg2Count>CRYPT5_KDF_LG2_COUNT_MAX)
|
|
{
|
|
wchar Info[20];
|
|
swprintf(Info,ASIZE(Info),L"xc%u",hd->Lg2Count);
|
|
UnkEncVerMsg(hd->FileName,Info);
|
|
}
|
|
Raw->GetB(hd->Salt,SIZE_SALT50);
|
|
Raw->GetB(hd->InitV,SIZE_INITV);
|
|
if (hd->UsePswCheck)
|
|
{
|
|
Raw->GetB(hd->PswCheck,SIZE_PSWCHECK);
|
|
|
|
// It is important to know if password check data is valid.
|
|
// If it is damaged and header CRC32 fails to detect it,
|
|
// archiver would refuse to decompress a possibly valid file.
|
|
// Since we want to be sure distinguishing a wrong password
|
|
// or corrupt file data, we use 64-bit password check data
|
|
// and to control its validity we use 32 bits of password
|
|
// check data SHA-256 additionally to 32-bit header CRC32.
|
|
byte csum[SIZE_PSWCHECK_CSUM];
|
|
Raw->GetB(csum,SIZE_PSWCHECK_CSUM);
|
|
|
|
sha256_context ctx;
|
|
sha256_init(&ctx);
|
|
sha256_process(&ctx, hd->PswCheck, SIZE_PSWCHECK);
|
|
|
|
byte Digest[SHA256_DIGEST_SIZE];
|
|
sha256_done(&ctx, Digest);
|
|
|
|
hd->UsePswCheck=memcmp(csum,Digest,SIZE_PSWCHECK_CSUM)==0;
|
|
|
|
// RAR 5.21 and earlier set PswCheck field in service records to 0
|
|
// even if UsePswCheck was present.
|
|
if (bb->HeaderType==HEAD_SERVICE && memcmp(hd->PswCheck,"\0\0\0\0\0\0\0\0",SIZE_PSWCHECK)==0)
|
|
hd->UsePswCheck=0;
|
|
}
|
|
hd->SaltSet=true;
|
|
hd->CryptMethod=CRYPT_RAR50;
|
|
hd->Encrypted=true;
|
|
}
|
|
}
|
|
break;
|
|
case FHEXTRA_HASH:
|
|
{
|
|
FileHeader *hd=(FileHeader *)bb;
|
|
uint Type=(uint)Raw->GetV();
|
|
if (Type==FHEXTRA_HASH_BLAKE2)
|
|
{
|
|
hd->FileHash.Type=HASH_BLAKE2;
|
|
Raw->GetB(hd->FileHash.Digest,BLAKE2_DIGEST_SIZE);
|
|
}
|
|
}
|
|
break;
|
|
case FHEXTRA_HTIME:
|
|
if (FieldSize>=5)
|
|
{
|
|
byte Flags=(byte)Raw->GetV();
|
|
bool UnixTime=(Flags & FHEXTRA_HTIME_UNIXTIME)!=0;
|
|
if ((Flags & FHEXTRA_HTIME_MTIME)!=0)
|
|
if (UnixTime)
|
|
hd->mtime.SetUnix(Raw->Get4());
|
|
else
|
|
hd->mtime.SetWin(Raw->Get8());
|
|
if ((Flags & FHEXTRA_HTIME_CTIME)!=0)
|
|
if (UnixTime)
|
|
hd->ctime.SetUnix(Raw->Get4());
|
|
else
|
|
hd->ctime.SetWin(Raw->Get8());
|
|
if ((Flags & FHEXTRA_HTIME_ATIME)!=0)
|
|
if (UnixTime)
|
|
hd->atime.SetUnix((time_t)Raw->Get4());
|
|
else
|
|
hd->atime.SetWin(Raw->Get8());
|
|
if (UnixTime && (Flags & FHEXTRA_HTIME_UNIX_NS)!=0) // Add nanoseconds.
|
|
{
|
|
uint ns;
|
|
if ((Flags & FHEXTRA_HTIME_MTIME)!=0 && (ns=(Raw->Get4() & 0x3fffffff))<1000000000)
|
|
hd->mtime.Adjust(ns);
|
|
if ((Flags & FHEXTRA_HTIME_CTIME)!=0 && (ns=(Raw->Get4() & 0x3fffffff))<1000000000)
|
|
hd->ctime.Adjust(ns);
|
|
if ((Flags & FHEXTRA_HTIME_ATIME)!=0 && (ns=(Raw->Get4() & 0x3fffffff))<1000000000)
|
|
hd->atime.Adjust(ns);
|
|
}
|
|
}
|
|
break;
|
|
case FHEXTRA_VERSION:
|
|
if (FieldSize>=1)
|
|
{
|
|
Raw->GetV(); // Skip flags field.
|
|
uint Version=(uint)Raw->GetV();
|
|
if (Version!=0)
|
|
{
|
|
hd->Version=true;
|
|
|
|
wchar VerText[20];
|
|
swprintf(VerText,ASIZE(VerText),L";%u",Version);
|
|
wcsncatz(hd->FileName,VerText,ASIZE(hd->FileName));
|
|
}
|
|
}
|
|
break;
|
|
case FHEXTRA_REDIR:
|
|
{
|
|
hd->RedirType=(FILE_SYSTEM_REDIRECT)Raw->GetV();
|
|
uint Flags=(uint)Raw->GetV();
|
|
hd->DirTarget=(Flags & FHEXTRA_REDIR_DIR)!=0;
|
|
size_t NameSize=(size_t)Raw->GetV();
|
|
|
|
char UtfName[NM*4];
|
|
*UtfName=0;
|
|
if (NameSize<ASIZE(UtfName)-1)
|
|
{
|
|
Raw->GetB(UtfName,NameSize);
|
|
UtfName[NameSize]=0;
|
|
}
|
|
#ifdef _WIN_ALL
|
|
UnixSlashToDos(UtfName,UtfName,ASIZE(UtfName));
|
|
#endif
|
|
UtfToWide(UtfName,hd->RedirName,ASIZE(hd->RedirName));
|
|
}
|
|
break;
|
|
case FHEXTRA_UOWNER:
|
|
{
|
|
uint Flags=(uint)Raw->GetV();
|
|
hd->UnixOwnerNumeric=(Flags & FHEXTRA_UOWNER_NUMUID)!=0;
|
|
hd->UnixGroupNumeric=(Flags & FHEXTRA_UOWNER_NUMGID)!=0;
|
|
*hd->UnixOwnerName=*hd->UnixGroupName=0;
|
|
if ((Flags & FHEXTRA_UOWNER_UNAME)!=0)
|
|
{
|
|
size_t Length=(size_t)Raw->GetV();
|
|
Length=Min(Length,ASIZE(hd->UnixOwnerName)-1);
|
|
Raw->GetB(hd->UnixOwnerName,Length);
|
|
hd->UnixOwnerName[Length]=0;
|
|
}
|
|
if ((Flags & FHEXTRA_UOWNER_GNAME)!=0)
|
|
{
|
|
size_t Length=(size_t)Raw->GetV();
|
|
Length=Min(Length,ASIZE(hd->UnixGroupName)-1);
|
|
Raw->GetB(hd->UnixGroupName,Length);
|
|
hd->UnixGroupName[Length]=0;
|
|
}
|
|
#ifdef _UNIX
|
|
if (hd->UnixOwnerNumeric)
|
|
hd->UnixOwnerID=(uid_t)Raw->GetV();
|
|
if (hd->UnixGroupNumeric)
|
|
hd->UnixGroupID=(gid_t)Raw->GetV();
|
|
#else
|
|
// Need these fields in Windows too for 'list' command,
|
|
// but uid_t and gid_t are not defined.
|
|
if (hd->UnixOwnerNumeric)
|
|
hd->UnixOwnerID=(uint)Raw->GetV();
|
|
if (hd->UnixGroupNumeric)
|
|
hd->UnixGroupID=(uint)Raw->GetV();
|
|
#endif
|
|
hd->UnixOwnerSet=true;
|
|
}
|
|
break;
|
|
case FHEXTRA_SUBDATA:
|
|
{
|
|
// RAR 5.21 and earlier set FHEXTRA_SUBDATA size to 1 less than
|
|
// required. It did not hurt extraction, because UnRAR 5.21
|
|
// and earlier ignored this field and set FieldSize as data left
|
|
// in entire extra area. But now we set the correct field size
|
|
// and set FieldSize based on the actual extra record size,
|
|
// so we need to adjust it for those older archives here.
|
|
// FHEXTRA_SUBDATA in those archives always belongs to HEAD_SERVICE
|
|
// and always is last in extra area. So since its size is by 1
|
|
// less than needed, we always have 1 byte left in extra area,
|
|
// which fact we use here to detect such archives.
|
|
if (bb->HeaderType==HEAD_SERVICE && Raw->Size()-NextPos==1)
|
|
FieldSize++;
|
|
|
|
// We cannot allocate too much memory here, because above
|
|
// we check FieldSize againt Raw size and we control that Raw size
|
|
// is sensible when reading headers.
|
|
hd->SubData.Alloc((size_t)FieldSize);
|
|
Raw->GetB(hd->SubData.Addr(0),(size_t)FieldSize);
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
|
|
Raw->SetPos(NextPos);
|
|
}
|
|
}
|
|
|
|
|
|
#ifndef SFX_MODULE
|
|
size_t Archive::ReadHeader14()
|
|
{
|
|
RawRead Raw(this);
|
|
if (CurBlockPos<=(int64)SFXSize)
|
|
{
|
|
Raw.Read(SIZEOF_MAINHEAD14);
|
|
MainHead.Reset();
|
|
byte Mark[4];
|
|
Raw.GetB(Mark,4);
|
|
uint HeadSize=Raw.Get2();
|
|
if (HeadSize<7)
|
|
return false;
|
|
byte Flags=Raw.Get1();
|
|
NextBlockPos=CurBlockPos+HeadSize;
|
|
CurHeaderType=HEAD_MAIN;
|
|
|
|
Volume=(Flags & MHD_VOLUME)!=0;
|
|
Solid=(Flags & MHD_SOLID)!=0;
|
|
Locked=(Flags & MHD_LOCK)!=0;
|
|
MainHead.CommentInHeader=(Flags & MHD_COMMENT)!=0;
|
|
MainHead.PackComment=(Flags & MHD_PACK_COMMENT)!=0;
|
|
}
|
|
else
|
|
{
|
|
Raw.Read(SIZEOF_FILEHEAD14);
|
|
FileHead.Reset();
|
|
|
|
FileHead.HeaderType=HEAD_FILE;
|
|
FileHead.DataSize=Raw.Get4();
|
|
FileHead.UnpSize=Raw.Get4();
|
|
FileHead.FileHash.Type=HASH_RAR14;
|
|
FileHead.FileHash.CRC32=Raw.Get2();
|
|
FileHead.HeadSize=Raw.Get2();
|
|
if (FileHead.HeadSize<21)
|
|
return false;
|
|
uint FileTime=Raw.Get4();
|
|
FileHead.FileAttr=Raw.Get1();
|
|
FileHead.Flags=Raw.Get1()|LONG_BLOCK;
|
|
FileHead.UnpVer=(Raw.Get1()==2) ? 13 : 10;
|
|
size_t NameSize=Raw.Get1();
|
|
FileHead.Method=Raw.Get1();
|
|
|
|
FileHead.SplitBefore=(FileHead.Flags & LHD_SPLIT_BEFORE)!=0;
|
|
FileHead.SplitAfter=(FileHead.Flags & LHD_SPLIT_AFTER)!=0;
|
|
FileHead.Encrypted=(FileHead.Flags & LHD_PASSWORD)!=0;
|
|
FileHead.CryptMethod=FileHead.Encrypted ? CRYPT_RAR13:CRYPT_NONE;
|
|
|
|
FileHead.PackSize=FileHead.DataSize;
|
|
FileHead.WinSize=0x10000;
|
|
FileHead.Dir=(FileHead.FileAttr & 0x10)!=0;
|
|
|
|
FileHead.HostOS=HOST_MSDOS;
|
|
FileHead.HSType=HSYS_WINDOWS;
|
|
|
|
FileHead.mtime.SetDos(FileTime);
|
|
|
|
Raw.Read(NameSize);
|
|
|
|
char FileName[NM];
|
|
size_t ReadNameSize=Min(NameSize,ASIZE(FileName)-1);
|
|
Raw.GetB((byte *)FileName,ReadNameSize);
|
|
FileName[ReadNameSize]=0;
|
|
IntToExt(FileName,FileName,ASIZE(FileName));
|
|
CharToWide(FileName,FileHead.FileName,ASIZE(FileHead.FileName));
|
|
ConvertNameCase(FileHead.FileName);
|
|
ConvertFileHeader(&FileHead);
|
|
|
|
if (Raw.Size()!=0)
|
|
NextBlockPos=CurBlockPos+FileHead.HeadSize+FileHead.PackSize;
|
|
CurHeaderType=HEAD_FILE;
|
|
}
|
|
return NextBlockPos>CurBlockPos ? Raw.Size() : 0;
|
|
}
|
|
#endif
|
|
|
|
|
|
#ifndef SFX_MODULE
|
|
void Archive::ConvertNameCase(wchar *Name)
|
|
{
|
|
if (Cmd->ConvertNames==NAMES_UPPERCASE)
|
|
wcsupper(Name);
|
|
if (Cmd->ConvertNames==NAMES_LOWERCASE)
|
|
wcslower(Name);
|
|
}
|
|
#endif
|
|
|
|
|
|
bool Archive::IsArcDir()
|
|
{
|
|
return FileHead.Dir;
|
|
}
|
|
|
|
|
|
void Archive::ConvertAttributes()
|
|
{
|
|
#if defined(_WIN_ALL) || defined(_EMX)
|
|
if (FileHead.HSType!=HSYS_WINDOWS)
|
|
FileHead.FileAttr=FileHead.Dir ? 0x10 : 0x20;
|
|
#endif
|
|
#ifdef _UNIX
|
|
// umask defines which permission bits must not be set by default
|
|
// when creating a file or directory. The typical default value
|
|
// for the process umask is S_IWGRP | S_IWOTH (octal 022),
|
|
// resulting in 0644 mode for new files.
|
|
// Normally umask is applied automatically when creating a file,
|
|
// but we set attributes with chmod later, so we need to calculate
|
|
// resulting attributes here. We do it only for non-Unix archives.
|
|
// We restore native Unix attributes as is, because it can be backup.
|
|
static mode_t mask = (mode_t) -1;
|
|
|
|
if (mask == (mode_t) -1)
|
|
{
|
|
// umask call returns the current umask value. Argument (022) is not
|
|
// really important here.
|
|
mask = umask(022);
|
|
|
|
// Restore the original umask value, which was changed to 022 above.
|
|
umask(mask);
|
|
}
|
|
|
|
switch(FileHead.HSType)
|
|
{
|
|
case HSYS_WINDOWS:
|
|
{
|
|
// Mapping MSDOS, OS/2 and Windows file attributes to Unix.
|
|
|
|
if (FileHead.FileAttr & 0x10) // FILE_ATTRIBUTE_DIRECTORY
|
|
{
|
|
// For directories we use 0777 mask.
|
|
FileHead.FileAttr=0777 & ~mask;
|
|
}
|
|
else
|
|
if (FileHead.FileAttr & 1) // FILE_ATTRIBUTE_READONLY
|
|
{
|
|
// For read only files we use 0444 mask with 'w' bits turned off.
|
|
FileHead.FileAttr=0444 & ~mask;
|
|
}
|
|
else
|
|
{
|
|
// umask does not set +x for regular files, so we use 0666
|
|
// instead of 0777 as for directories.
|
|
FileHead.FileAttr=0666 & ~mask;
|
|
}
|
|
}
|
|
break;
|
|
case HSYS_UNIX:
|
|
break;
|
|
default:
|
|
if (FileHead.Dir)
|
|
FileHead.FileAttr=0x41ff & ~mask;
|
|
else
|
|
FileHead.FileAttr=0x81b6 & ~mask;
|
|
break;
|
|
}
|
|
#endif
|
|
}
|
|
|
|
|
|
void Archive::ConvertFileHeader(FileHeader *hd)
|
|
{
|
|
if (hd->HSType==HSYS_UNKNOWN)
|
|
if (hd->Dir)
|
|
hd->FileAttr=0x10;
|
|
else
|
|
hd->FileAttr=0x20;
|
|
|
|
#ifdef _WIN_ALL
|
|
if (hd->HSType==HSYS_UNIX) // Convert Unix, OS X and Android decomposed chracters to Windows precomposed.
|
|
ConvertToPrecomposed(hd->FileName,ASIZE(hd->FileName));
|
|
#endif
|
|
|
|
for (wchar *s=hd->FileName;*s!=0;s++)
|
|
{
|
|
#ifdef _UNIX
|
|
// Backslash is the invalid character for Windows file headers,
|
|
// but it can present in Unix file names extracted in Unix.
|
|
if (*s=='\\' && Format==RARFMT50 && hd->HSType==HSYS_WINDOWS)
|
|
*s='_';
|
|
#endif
|
|
|
|
#if defined(_WIN_ALL) || defined(_EMX)
|
|
// RAR 5.0 archives do not use '\' as path separator, so if we see it,
|
|
// it means that it is a part of Unix file name, which we cannot
|
|
// extract in Windows.
|
|
if (*s=='\\' && Format==RARFMT50)
|
|
*s='_';
|
|
|
|
// ':' in file names is allowed in Unix, but not in Windows.
|
|
// Even worse, file data will be written to NTFS stream on NTFS,
|
|
// so automatic name correction on file create error in extraction
|
|
// routine does not work. In Windows and DOS versions we better
|
|
// replace ':' now.
|
|
if (*s==':')
|
|
*s='_';
|
|
#endif
|
|
|
|
// This code must be performed only after other path separator checks,
|
|
// because it produces backslashes illegal for some of checks above.
|
|
// Backslash is allowed in file names in Unix, but not in Windows.
|
|
// Still, RAR 4.x uses backslashes as path separator even in Unix.
|
|
// Forward slash is not allowed in both systems. In RAR 5.0 we use
|
|
// the forward slash as universal path separator.
|
|
if (*s=='/' || *s=='\\' && Format!=RARFMT50)
|
|
*s=CPATHDIVIDER;
|
|
}
|
|
}
|
|
|
|
|
|
int64 Archive::GetStartPos()
|
|
{
|
|
int64 StartPos=SFXSize+MarkHead.HeadSize;
|
|
if (Format==RARFMT15)
|
|
StartPos+=MainHead.HeadSize;
|
|
else // RAR 5.0.
|
|
StartPos+=CryptHead.HeadSize+FullHeaderSize(MainHead.HeadSize);
|
|
return StartPos;
|
|
}
|
|
|
|
|
|
bool Archive::ReadSubData(Array<byte> *UnpData,File *DestFile,bool TestMode)
|
|
{
|
|
if (BrokenHeader)
|
|
{
|
|
uiMsg(UIERROR_SUBHEADERBROKEN,FileName);
|
|
ErrHandler.SetErrorCode(RARX_CRC);
|
|
return false;
|
|
}
|
|
if (SubHead.Method>5 || SubHead.UnpVer>(Format==RARFMT50 ? VER_UNPACK5:VER_UNPACK))
|
|
{
|
|
uiMsg(UIERROR_SUBHEADERUNKNOWN,FileName);
|
|
return false;
|
|
}
|
|
|
|
if (SubHead.PackSize==0 && !SubHead.SplitAfter)
|
|
return true;
|
|
|
|
SubDataIO.Init();
|
|
Unpack Unpack(&SubDataIO);
|
|
Unpack.Init(SubHead.WinSize,false);
|
|
|
|
if (DestFile==NULL)
|
|
{
|
|
if (SubHead.UnpSize>0x1000000)
|
|
{
|
|
// So huge allocation must never happen in valid archives.
|
|
uiMsg(UIERROR_SUBHEADERUNKNOWN,FileName);
|
|
return false;
|
|
}
|
|
if (UnpData==NULL)
|
|
SubDataIO.SetTestMode(true);
|
|
else
|
|
{
|
|
UnpData->Alloc((size_t)SubHead.UnpSize);
|
|
SubDataIO.SetUnpackToMemory(&(*UnpData)[0],(uint)SubHead.UnpSize);
|
|
}
|
|
}
|
|
if (SubHead.Encrypted)
|
|
if (Cmd->Password.IsSet())
|
|
SubDataIO.SetEncryption(false,SubHead.CryptMethod,&Cmd->Password,
|
|
SubHead.SaltSet ? SubHead.Salt:NULL,SubHead.InitV,
|
|
SubHead.Lg2Count,SubHead.HashKey,SubHead.PswCheck);
|
|
else
|
|
return false;
|
|
SubDataIO.UnpHash.Init(SubHead.FileHash.Type,1);
|
|
SubDataIO.SetPackedSizeToRead(SubHead.PackSize);
|
|
SubDataIO.EnableShowProgress(false);
|
|
SubDataIO.SetFiles(this,DestFile);
|
|
SubDataIO.SetTestMode(TestMode);
|
|
SubDataIO.UnpVolume=SubHead.SplitAfter;
|
|
SubDataIO.SetSubHeader(&SubHead,NULL);
|
|
Unpack.SetDestSize(SubHead.UnpSize);
|
|
if (SubHead.Method==0)
|
|
CmdExtract::UnstoreFile(SubDataIO,SubHead.UnpSize);
|
|
else
|
|
Unpack.DoUnpack(SubHead.UnpVer,false);
|
|
|
|
if (!SubDataIO.UnpHash.Cmp(&SubHead.FileHash,SubHead.UseHashKey ? SubHead.HashKey:NULL))
|
|
{
|
|
uiMsg(UIERROR_SUBHEADERDATABROKEN,FileName,SubHead.FileName);
|
|
ErrHandler.SetErrorCode(RARX_CRC);
|
|
if (UnpData!=NULL)
|
|
UnpData->Reset();
|
|
return false;
|
|
}
|
|
return true;
|
|
}
|