size_t Archive::SearchSubBlock(const wchar *Type)
{
size_t Size;
while ((Size=ReadHeader())!=0 && GetHeaderType()!=HEAD_ENDARC)
{
if (GetHeaderType()==HEAD_SERVICE && SubHead.CmpName(Type))
return Size;
SeekToNext();
}
return 0;
}
int Archive::SearchSubBlock(const char *Type)
{
int Size;
while ((Size=ReadHeader())!=0 && GetHeaderType()!=ENDARC_HEAD)
{
if (GetHeaderType()==NEWSUB_HEAD && SubHead.CmpName(Type))
return(Size);
SeekToNext();
}
return(0);
}
size_t Archive::SearchBlock(HEADER_TYPE HeaderType)
{
size_t Size,Count=0;
while ((Size=ReadHeader())!=0 &&
(HeaderType==HEAD_ENDARC || GetHeaderType()!=HEAD_ENDARC))
{
if ((++Count & 127)==0)
Wait();
if (GetHeaderType()==HeaderType)
return Size;
SeekToNext();
}
return 0;
}
int Archive::SearchBlock(int BlockType)
{
int Size,Count=0;
while ((Size=ReadHeader())!=0 &&
(BlockType==ENDARC_HEAD || GetHeaderType()!=ENDARC_HEAD))
{
if ((++Count & 127)==0)
Wait();
if (GetHeaderType()==BlockType)
return(Size);
SeekToNext();
}
return(0);
}
bool Archive::IsArchive(bool EnableBroken)
{
Encrypted=false;
#ifdef USE_QOPEN
QOpen.Unload();
#endif
// Important if we reuse Archive object and it has virtual QOpen
// file position not matching real. For example, for 'l -v volname'.
Seek(0,SEEK_SET);
#ifndef SFX_MODULE
if (IsDevice())
{
#ifndef SHELL_EXT
Log(FileName,St(MInvalidName),FileName);
#endif
return false;
}
#endif
if (Read(MarkHead.Mark,SIZEOF_MARKHEAD3)!=SIZEOF_MARKHEAD3)
return(false);
SFXSize=0;
RARFORMAT Type;
if ((Type=IsSignature(MarkHead.Mark,SIZEOF_MARKHEAD3))!=RARFMT_NONE)
{
Format=Type;
if (Format==RARFMT14)
Seek(0,SEEK_SET);
}
else
{
Array<char> Buffer(MAXSFXSIZE);
long CurPos=(long)Tell();
int ReadSize=Read(&Buffer[0],Buffer.Size()-16);
for (int I=0;I<ReadSize;I++)
if (Buffer[I]==0x52 && (Type=IsSignature((byte *)&Buffer[I],ReadSize-I))!=RARFMT_NONE)
{
Format=Type;
if (Format==RARFMT14 && I>0 && CurPos<28 && ReadSize>31)
{
char *D=&Buffer[28-CurPos];
if (D[0]!=0x52 || D[1]!=0x53 || D[2]!=0x46 || D[3]!=0x58)
continue;
}
SFXSize=CurPos+I;
Seek(SFXSize,SEEK_SET);
if (Format==RARFMT15 || Format==RARFMT50)
Read(MarkHead.Mark,SIZEOF_MARKHEAD3);
break;
}
if (SFXSize==0)
return false;
}
if (Format==RARFMT_FUTURE)
{
#if !defined(SHELL_EXT) && !defined(SFX_MODULE)
Log(FileName,St(MNewRarFormat));
#endif
return false;
}
if (Format==RARFMT50) // RAR 5.0 signature is by one byte longer.
{
Read(MarkHead.Mark+SIZEOF_MARKHEAD3,1);
if (MarkHead.Mark[SIZEOF_MARKHEAD3]!=0)
return false;
MarkHead.HeadSize=SIZEOF_MARKHEAD5;
}
else
MarkHead.HeadSize=SIZEOF_MARKHEAD3;
// Skip the archive encryption header if any and read the main header.
while (ReadHeader()!=0 && GetHeaderType()!=HEAD_MAIN)
SeekToNext();
// This check allows to make RS based recovery even if password is incorrect.
// But we should not do it for EnableBroken or we'll get 'not RAR archive'
// messages when extracting encrypted archives with wrong password.
if (FailedHeaderDecryption && !EnableBroken)
return false;
SeekToNext();
if (BrokenHeader)
{
#ifndef SHELL_EXT
Log(FileName,St(MMainHeaderBroken));
#endif
if (!EnableBroken)
return false;
}
/*
if (MainHead.EncryptVer>VER_UNPACK)
{
#ifdef RARDLL
Cmd->DllError=ERAR_UNKNOWN_FORMAT;
#else
ErrHandler.SetErrorCode(RARX_WARNING);
#if !defined(SILENT) && !defined(SFX_MODULE)
Log(FileName,St(MUnknownMeth),FileName);
Log(FileName,St(MVerRequired),MainHead.EncryptVer/10,MainHead.EncryptVer%10);
#endif
#endif
return(false);
}
*/
#ifdef RARDLL
// If callback function is not set, we cannot get the password,
// so we skip the initial header processing for encrypted header archive.
// It leads to skipped archive comment, but the rest of archive data
// is processed correctly.
if (Cmd->Callback==NULL)
SilentOpen=true;
#endif
MainComment=MainHead.CommentInHeader;
#ifdef USE_QOPEN
if (MainHead.Locator && MainHead.QOpenOffset>0 && Cmd->QOpenMode!=QOPEN_NONE)
{
QOpen.Init(this,false);
QOpen.Load(MainHead.QOpenOffset);
}
#endif
// If we process non-encrypted archive or can request a password,
// we set 'first volume' flag based on file attributes below.
// It is necessary for RAR 2.x archives, which did not have 'first volume'
// flag in main header.
if (!SilentOpen || !Encrypted)
{
SaveFilePos SavePos(*this);
int64 SaveCurBlockPos=CurBlockPos,SaveNextBlockPos=NextBlockPos;
while (ReadHeader()!=0)
{
HEADER_TYPE HeaderType=GetHeaderType();
if (HeaderType==HEAD_SERVICE)
{
if (SubHead.CmpName(SUBHEAD_TYPE_CMT))
MainComment=true;
FirstVolume=!SubHead.SplitBefore;
}
else
{
FirstVolume=HeaderType==HEAD_FILE && !FileHead.SplitBefore;
break;
}
SeekToNext();
}
CurBlockPos=SaveCurBlockPos;
NextBlockPos=SaveNextBlockPos;
}
if (!Volume || FirstVolume)
wcscpy(FirstVolumeName,FileName);
return true;
}
bool Archive::IsArchive(bool EnableBroken)
{
Encrypted=false;
#ifndef SFX_MODULE
if (IsDevice())
{
#ifndef SHELL_EXT
Log(FileName,St(MInvalidName),FileName);
#endif
return(false);
}
#endif
if (Read(MarkHead.Mark,SIZEOF_MARKHEAD)!=SIZEOF_MARKHEAD)
return(false);
SFXSize=0;
if (IsSignature(MarkHead.Mark))
{
if (OldFormat)
Seek(0,SEEK_SET);
}
else
{
Array<char> Buffer(MAXSFXSIZE);
long CurPos=(long)Tell();
int ReadSize=Read(&Buffer[0],Buffer.Size()-16);
for (int I=0;I<ReadSize;I++)
if (Buffer[I]==0x52 && IsSignature((byte *)&Buffer[I]))
{
if (OldFormat && I>0 && CurPos<28 && ReadSize>31)
{
char *D=&Buffer[28-CurPos];
if (D[0]!=0x52 || D[1]!=0x53 || D[2]!=0x46 || D[3]!=0x58)
continue;
}
SFXSize=CurPos+I;
Seek(SFXSize,SEEK_SET);
if (!OldFormat)
Read(MarkHead.Mark,SIZEOF_MARKHEAD);
break;
}
if (SFXSize==0)
return(false);
}
ReadHeader();
SeekToNext();
#ifndef SFX_MODULE
if (OldFormat)
{
NewMhd.Flags=OldMhd.Flags & 0x3f;
NewMhd.HeadSize=OldMhd.HeadSize;
}
else
#endif
{
if (HeaderCRC!=NewMhd.HeadCRC)
{
#ifndef SHELL_EXT
Log(FileName,St(MLogMainHead));
#endif
Alarm();
if (!EnableBroken)
return(false);
}
}
Volume=(NewMhd.Flags & MHD_VOLUME);
Solid=(NewMhd.Flags & MHD_SOLID)!=0;
MainComment=(NewMhd.Flags & MHD_COMMENT)!=0;
Locked=(NewMhd.Flags & MHD_LOCK)!=0;
Signed=(NewMhd.PosAV!=0);
Protected=(NewMhd.Flags & MHD_PROTECT)!=0;
Encrypted=(NewMhd.Flags & MHD_PASSWORD)!=0;
if (NewMhd.EncryptVer>UNP_VER)
{
#ifdef RARDLL
Cmd->DllError=ERAR_UNKNOWN_FORMAT;
#else
ErrHandler.SetErrorCode(RARX_WARNING);
#if !defined(SILENT) && !defined(SFX_MODULE)
Log(FileName,St(MUnknownMeth),FileName);
Log(FileName,St(MVerRequired),NewMhd.EncryptVer/10,NewMhd.EncryptVer%10);
#endif
#endif
return(false);
}
#ifdef RARDLL
// If callback function is not set, we cannot get the password,
// so we skip the initial header processing for encrypted header archive.
// It leads to skipped archive comment, but the rest of archive data
// is processed correctly.
if (Cmd->Callback==NULL)
SilentOpen=true;
#endif
// If not encrypted, we'll check it below.
NotFirstVolume=Encrypted && (NewMhd.Flags & MHD_FIRSTVOLUME)==0;
if (!SilentOpen || !Encrypted)
{
SaveFilePos SavePos(*this);
int64 SaveCurBlockPos=CurBlockPos,SaveNextBlockPos=NextBlockPos;
NotFirstVolume=false;
while (ReadHeader()!=0)
{
int HeaderType=GetHeaderType();
if (HeaderType==NEWSUB_HEAD)
{
if (SubHead.CmpName(SUBHEAD_TYPE_CMT))
MainComment=true;
if ((SubHead.Flags & LHD_SPLIT_BEFORE) ||
Volume && (NewMhd.Flags & MHD_FIRSTVOLUME)==0)
NotFirstVolume=true;
}
else
{
if (HeaderType==FILE_HEAD && ((NewLhd.Flags & LHD_SPLIT_BEFORE)!=0 ||
Volume && NewLhd.UnpVer>=29 && (NewMhd.Flags & MHD_FIRSTVOLUME)==0))
NotFirstVolume=true;
break;
}
SeekToNext();
}
CurBlockPos=SaveCurBlockPos;
NextBlockPos=SaveNextBlockPos;
}
if (!Volume || !NotFirstVolume)
{
strcpy(FirstVolumeName,FileName);
wcscpy(FirstVolumeNameW,FileNameW);
}
return(true);
}
bool Archive::IsArchive(bool EnableBroken)
{
Encrypted=false;
#ifndef SFX_MODULE
if (IsDevice())
{
#ifndef SHELL_EXT
Log(FileName,St(MInvalidName),FileName);
#endif
return(false);
}
#endif
if (Read(MarkHead.Mark,SIZEOF_MARKHEAD)!=SIZEOF_MARKHEAD)
return(false);
SFXSize=0;
if (IsSignature(MarkHead.Mark))
{
if (OldFormat)
Seek(0,SEEK_SET);
}
else
{
Array<char> Buffer(0x40000);
long CurPos=int64to32(Tell());
int ReadSize=Read(&Buffer[0],Buffer.Size()-16);
for (int I=0;I<ReadSize;I++)
if (Buffer[I]==0x52 && IsSignature((byte *)&Buffer[I]))
{
SFXSize=CurPos+I;
Seek(SFXSize,SEEK_SET);
if (!OldFormat)
Read(MarkHead.Mark,SIZEOF_MARKHEAD);
break;
}
if (SFXSize==0)
return(false);
}
ReadHeader();
SeekToNext();
#ifndef SFX_MODULE
if (OldFormat)
{
NewMhd.Flags=OldMhd.Flags & 0x3f;
NewMhd.HeadSize=OldMhd.HeadSize;
}
else
#endif
{
if (HeaderCRC!=NewMhd.HeadCRC)
{
#ifndef SHELL_EXT
Log(FileName,St(MLogMainHead));
#endif
Alarm();
if (!EnableBroken)
return(false);
}
}
Volume=(NewMhd.Flags & MHD_VOLUME);
Solid=(NewMhd.Flags & MHD_SOLID)!=0;
MainComment=(NewMhd.Flags & MHD_COMMENT)!=0;
Locked=(NewMhd.Flags & MHD_LOCK)!=0;
Signed=(NewMhd.PosAV!=0);
Protected=(NewMhd.Flags & MHD_PROTECT)!=0;
Encrypted=(NewMhd.Flags & MHD_PASSWORD)!=0;
#ifdef RARDLL
SilentOpen=true;
#endif
if (!SilentOpen || !Encrypted)
{
SaveFilePos SavePos(*this);
Int64 SaveCurBlockPos=CurBlockPos,SaveNextBlockPos=NextBlockPos;
NotFirstVolume=false;
while (ReadHeader())
{
int HeaderType=GetHeaderType();
if (HeaderType==NEWSUB_HEAD)
{
if (SubHead.CmpName(SUBHEAD_TYPE_CMT))
MainComment=true;
if ((SubHead.Flags & LHD_SPLIT_BEFORE) ||
Volume && (NewMhd.Flags & MHD_FIRSTVOLUME)==0)
NotFirstVolume=true;
}
else
{
if (HeaderType==FILE_HEAD && ((NewLhd.Flags & LHD_SPLIT_BEFORE)!=0 ||
Volume && NewLhd.UnpVer>=29 && (NewMhd.Flags & MHD_FIRSTVOLUME)==0))
NotFirstVolume=true;
break;
}
SeekToNext();
}
CurBlockPos=SaveCurBlockPos;
NextBlockPos=SaveNextBlockPos;
}
return(true);
}
bool Archive::IsArchive(bool EnableBroken)
{
Encrypted=false;
BrokenHeader=false; // Might be left from previous volume.
#ifndef SFX_MODULE
if (IsDevice())
{
uiMsg(UIERROR_INVALIDNAME,FileName,FileName);
return false;
}
#endif
if (Read(MarkHead.Mark,SIZEOF_MARKHEAD3)!=SIZEOF_MARKHEAD3)
return false;
SFXSize=0;
RARFORMAT Type;
if ((Type=IsSignature(MarkHead.Mark,SIZEOF_MARKHEAD3))!=RARFMT_NONE)
{
Format=Type;
if (Format==RARFMT14)
Seek(Tell()-SIZEOF_MARKHEAD3,SEEK_SET);
}
else
{
Array<char> Buffer(MAXSFXSIZE);
long CurPos=(long)Tell();
int ReadSize=Read(&Buffer[0],Buffer.Size()-16);
for (int I=0;I<ReadSize;I++)
if (Buffer[I]==0x52 && (Type=IsSignature((byte *)&Buffer[I],ReadSize-I))!=RARFMT_NONE)
{
Format=Type;
if (Format==RARFMT14 && I>0 && CurPos<28 && ReadSize>31)
{
char *D=&Buffer[28-CurPos];
if (D[0]!=0x52 || D[1]!=0x53 || D[2]!=0x46 || D[3]!=0x58)
continue;
}
SFXSize=CurPos+I;
Seek(SFXSize,SEEK_SET);
if (Format==RARFMT15 || Format==RARFMT50)
Read(MarkHead.Mark,SIZEOF_MARKHEAD3);
break;
}
if (SFXSize==0)
return false;
}
if (Format==RARFMT_FUTURE)
{
uiMsg(UIERROR_NEWRARFORMAT,FileName);
return false;
}
if (Format==RARFMT50) // RAR 5.0 signature is by one byte longer.
{
Read(MarkHead.Mark+SIZEOF_MARKHEAD3,1);
if (MarkHead.Mark[SIZEOF_MARKHEAD3]!=0)
return false;
MarkHead.HeadSize=SIZEOF_MARKHEAD5;
}
else
MarkHead.HeadSize=SIZEOF_MARKHEAD3;
#ifdef RARDLL
// If callback function is not set, we cannot get the password,
// so we skip the initial header processing for encrypted header archive.
// It leads to skipped archive comment, but the rest of archive data
// is processed correctly.
if (Cmd->Callback==NULL)
SilentOpen=true;
#endif
// Skip the archive encryption header if any and read the main header.
while (ReadHeader()!=0)
{
HEADER_TYPE Type=GetHeaderType();
// In RAR 5.0 we need to quit after reading HEAD_CRYPT if we wish to
// avoid the password prompt.
if (Type==HEAD_MAIN || SilentOpen && Type==HEAD_CRYPT)
break;
SeekToNext();
}
// This check allows to make RS based recovery even if password is incorrect.
// But we should not do it for EnableBroken or we'll get 'not RAR archive'
// messages when extracting encrypted archives with wrong password.
if (FailedHeaderDecryption && !EnableBroken)
return false;
SeekToNext();
if (BrokenHeader) // Main archive header is corrupt.
{
uiMsg(UIERROR_MHEADERBROKEN,FileName);
if (!EnableBroken)
return false;
}
MainComment=MainHead.CommentInHeader;
// If we process non-encrypted archive or can request a password,
// we set 'first volume' flag based on file attributes below.
// It is necessary for RAR 2.x archives, which did not have 'first volume'
// flag in main header. Also for all RAR formats we need to scan until
// first file header to set "comment" flag when reading service header.
// Unless we are in silent mode, we need to know about presence of comment
// immediately after IsArchive call.
if (!SilentOpen || !Encrypted)
{
SaveFilePos SavePos(*this);
int64 SaveCurBlockPos=CurBlockPos,SaveNextBlockPos=NextBlockPos;
HEADER_TYPE SaveCurHeaderType=CurHeaderType;
while (ReadHeader()!=0)
{
HEADER_TYPE HeaderType=GetHeaderType();
if (HeaderType==HEAD_SERVICE)
FirstVolume=Volume && !SubHead.SplitBefore;
else
if (HeaderType==HEAD_FILE)
{
FirstVolume=Volume && !FileHead.SplitBefore;
break;
}
SeekToNext();
}
CurBlockPos=SaveCurBlockPos;
NextBlockPos=SaveNextBlockPos;
CurHeaderType=SaveCurHeaderType;
}
if (!Volume || FirstVolume)
wcscpy(FirstVolumeName,FileName);
return true;
}
