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QuietUnrar/libunrar/dll.cpp

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#include "rar.hpp"
static int RarErrorToDll(RAR_EXIT ErrCode);
struct DataSet
{
CommandData Cmd;
Archive Arc;
CmdExtract Extract;
int OpenMode;
int HeaderSize;
DataSet():Arc(&Cmd),Extract(&Cmd) {};
};
HANDLE PASCAL RAROpenArchive(struct RAROpenArchiveData *r)
{
RAROpenArchiveDataEx rx;
memset(&rx,0,sizeof(rx));
rx.ArcName=r->ArcName;
rx.OpenMode=r->OpenMode;
rx.CmtBuf=r->CmtBuf;
rx.CmtBufSize=r->CmtBufSize;
HANDLE hArc=RAROpenArchiveEx(&rx);
r->OpenResult=rx.OpenResult;
r->CmtSize=rx.CmtSize;
r->CmtState=rx.CmtState;
return hArc;
}
HANDLE PASCAL RAROpenArchiveEx(struct RAROpenArchiveDataEx *r)
{
DataSet *Data=NULL;
try
{
ErrHandler.Clean();
r->OpenResult=0;
Data=new DataSet;
Data->Cmd.DllError=0;
Data->OpenMode=r->OpenMode;
Data->Cmd.FileArgs.AddString(L"*");
Data->Cmd.KeepBroken=(r->OpFlags&ROADOF_KEEPBROKEN)!=0;
char AnsiArcName[NM];
*AnsiArcName=0;
if (r->ArcName!=NULL)
{
strncpyz(AnsiArcName,r->ArcName,ASIZE(AnsiArcName));
#ifdef _WIN_ALL
if (!AreFileApisANSI())
{
OemToCharBuffA(r->ArcName,AnsiArcName,ASIZE(AnsiArcName));
AnsiArcName[ASIZE(AnsiArcName)-1]=0;
}
#endif
}
wchar ArcName[NM];
GetWideName(AnsiArcName,r->ArcNameW,ArcName,ASIZE(ArcName));
Data->Cmd.AddArcName(ArcName);
Data->Cmd.Overwrite=OVERWRITE_ALL;
Data->Cmd.VersionControl=1;
Data->Cmd.Callback=r->Callback;
Data->Cmd.UserData=r->UserData;
// Open shared mode is added by request of dll users, who need to
// browse and unpack archives while downloading.
Data->Cmd.OpenShared = true;
if (!Data->Arc.Open(ArcName,FMF_OPENSHARED))
{
r->OpenResult=ERAR_EOPEN;
delete Data;
return NULL;
}
if (!Data->Arc.IsArchive(true))
{
if (Data->Cmd.DllError!=0)
r->OpenResult=Data->Cmd.DllError;
else
{
RAR_EXIT ErrCode=ErrHandler.GetErrorCode();
if (ErrCode!=RARX_SUCCESS && ErrCode!=RARX_WARNING)
r->OpenResult=RarErrorToDll(ErrCode);
else
r->OpenResult=ERAR_BAD_ARCHIVE;
}
delete Data;
return NULL;
}
r->Flags=0;
if (Data->Arc.Volume)
r->Flags|=ROADF_VOLUME;
if (Data->Arc.MainComment)
r->Flags|=ROADF_COMMENT;
if (Data->Arc.Locked)
r->Flags|=ROADF_LOCK;
if (Data->Arc.Solid)
r->Flags|=ROADF_SOLID;
if (Data->Arc.NewNumbering)
r->Flags|=ROADF_NEWNUMBERING;
if (Data->Arc.Signed)
r->Flags|=ROADF_SIGNED;
if (Data->Arc.Protected)
r->Flags|=ROADF_RECOVERY;
if (Data->Arc.Encrypted)
r->Flags|=ROADF_ENCHEADERS;
if (Data->Arc.FirstVolume)
r->Flags|=ROADF_FIRSTVOLUME;
Array<wchar> CmtDataW;
if (r->CmtBufSize!=0 && Data->Arc.GetComment(&CmtDataW))
{
if (r->CmtBufW!=NULL)
{
CmtDataW.Push(0);
size_t Size=wcslen(&CmtDataW[0])+1;
r->CmtState=Size>r->CmtBufSize ? ERAR_SMALL_BUF:1;
r->CmtSize=(uint)Min(Size,r->CmtBufSize);
memcpy(r->CmtBufW,&CmtDataW[0],(r->CmtSize-1)*sizeof(*r->CmtBufW));
r->CmtBufW[r->CmtSize-1]=0;
}
else
if (r->CmtBuf!=NULL)
{
Array<char> CmtData(CmtDataW.Size()*4+1);
memset(&CmtData[0],0,CmtData.Size());
WideToChar(&CmtDataW[0],&CmtData[0],CmtData.Size()-1);
size_t Size=strlen(&CmtData[0])+1;
r->CmtState=Size>r->CmtBufSize ? ERAR_SMALL_BUF:1;
r->CmtSize=(uint)Min(Size,r->CmtBufSize);
memcpy(r->CmtBuf,&CmtData[0],r->CmtSize-1);
r->CmtBuf[r->CmtSize-1]=0;
}
}
else
r->CmtState=r->CmtSize=0;
Data->Extract.ExtractArchiveInit(Data->Arc);
return (HANDLE)Data;
}
catch (RAR_EXIT ErrCode)
{
if (Data!=NULL && Data->Cmd.DllError!=0)
r->OpenResult=Data->Cmd.DllError;
else
r->OpenResult=RarErrorToDll(ErrCode);
if (Data != NULL)
delete Data;
return NULL;
}
catch (std::bad_alloc&) // Catch 'new' exception.
{
r->OpenResult=ERAR_NO_MEMORY;
if (Data != NULL)
delete Data;
}
return NULL; // To make compilers happy.
}
int PASCAL RARCloseArchive(HANDLE hArcData)
{
DataSet *Data=(DataSet *)hArcData;
try
{
bool Success=Data==NULL ? false:Data->Arc.Close();
delete Data;
return Success ? ERAR_SUCCESS : ERAR_ECLOSE;
}
catch (RAR_EXIT ErrCode)
{
return Data->Cmd.DllError!=0 ? Data->Cmd.DllError : RarErrorToDll(ErrCode);
}
}
int PASCAL RARReadHeader(HANDLE hArcData,struct RARHeaderData *D)
{
struct RARHeaderDataEx X;
memset(&X,0,sizeof(X));
int Code=RARReadHeaderEx(hArcData,&X);
strncpyz(D->ArcName,X.ArcName,ASIZE(D->ArcName));
strncpyz(D->FileName,X.FileName,ASIZE(D->FileName));
D->Flags=X.Flags;
D->PackSize=X.PackSize;
D->UnpSize=X.UnpSize;
D->HostOS=X.HostOS;
D->FileCRC=X.FileCRC;
D->FileTime=X.FileTime;
D->UnpVer=X.UnpVer;
D->Method=X.Method;
D->FileAttr=X.FileAttr;
D->CmtSize=0;
D->CmtState=0;
return Code;
}
int PASCAL RARReadHeaderEx(HANDLE hArcData,struct RARHeaderDataEx *D)
{
DataSet *Data=(DataSet *)hArcData;
try
{
if ((Data->HeaderSize=(int)Data->Arc.SearchBlock(HEAD_FILE))<=0)
{
if (Data->Arc.Volume && Data->Arc.GetHeaderType()==HEAD_ENDARC &&
Data->Arc.EndArcHead.NextVolume)
if (MergeArchive(Data->Arc,NULL,false,'L'))
{
Data->Arc.Seek(Data->Arc.CurBlockPos,SEEK_SET);
return RARReadHeaderEx(hArcData,D);
}
else
return ERAR_EOPEN;
if (Data->Arc.BrokenHeader)
return ERAR_BAD_DATA;
// Might be necessary if RARSetPassword is still called instead of
// open callback for RAR5 archives and if password is invalid.
if (Data->Arc.FailedHeaderDecryption)
return ERAR_BAD_PASSWORD;
return ERAR_END_ARCHIVE;
}
FileHeader *hd=&Data->Arc.FileHead;
if (Data->OpenMode==RAR_OM_LIST && hd->SplitBefore)
{
int Code=RARProcessFile(hArcData,RAR_SKIP,NULL,NULL);
if (Code==0)
return RARReadHeaderEx(hArcData,D);
else
return Code;
}
wcsncpy(D->ArcNameW,Data->Arc.FileName,ASIZE(D->ArcNameW));
WideToChar(D->ArcNameW,D->ArcName,ASIZE(D->ArcName));
wcsncpy(D->FileNameW,hd->FileName,ASIZE(D->FileNameW));
WideToChar(D->FileNameW,D->FileName,ASIZE(D->FileName));
#ifdef _WIN_ALL
CharToOemA(D->FileName,D->FileName);
#endif
D->Flags=0;
if (hd->SplitBefore)
D->Flags|=RHDF_SPLITBEFORE;
if (hd->SplitAfter)
D->Flags|=RHDF_SPLITAFTER;
if (hd->Encrypted)
D->Flags|=RHDF_ENCRYPTED;
if (hd->Solid)
D->Flags|=RHDF_SOLID;
if (hd->Dir)
D->Flags|=RHDF_DIRECTORY;
D->PackSize=uint(hd->PackSize & 0xffffffff);
D->PackSizeHigh=uint(hd->PackSize>>32);
D->UnpSize=uint(hd->UnpSize & 0xffffffff);
D->UnpSizeHigh=uint(hd->UnpSize>>32);
D->HostOS=hd->HSType==HSYS_WINDOWS ? HOST_WIN32:HOST_UNIX;
D->UnpVer=Data->Arc.FileHead.UnpVer;
D->FileCRC=hd->FileHash.CRC32;
D->FileTime=hd->mtime.GetDos();
uint64 MRaw=hd->mtime.GetWin();
D->MtimeLow=(uint)MRaw;
D->MtimeHigh=(uint)(MRaw>>32);
uint64 CRaw=hd->ctime.GetWin();
D->CtimeLow=(uint)CRaw;
D->CtimeHigh=(uint)(CRaw>>32);
uint64 ARaw=hd->atime.GetWin();
D->AtimeLow=(uint)ARaw;
D->AtimeHigh=(uint)(ARaw>>32);
D->Method=hd->Method+0x30;
D->FileAttr=hd->FileAttr;
D->CmtSize=0;
D->CmtState=0;
D->DictSize=uint(hd->WinSize/1024);
switch (hd->FileHash.Type)
{
case HASH_RAR14:
case HASH_CRC32:
D->HashType=RAR_HASH_CRC32;
break;
case HASH_BLAKE2:
D->HashType=RAR_HASH_BLAKE2;
memcpy(D->Hash,hd->FileHash.Digest,BLAKE2_DIGEST_SIZE);
break;
default:
D->HashType=RAR_HASH_NONE;
break;
}
D->RedirType=hd->RedirType;
// RedirNameSize sanity check is useful in case some developer
// did not initialize Reserved area with 0 as required in docs.
// We have taken 'Redir*' fields from Reserved area. We may remove
// this RedirNameSize check sometimes later.
if (hd->RedirType!=FSREDIR_NONE && D->RedirName!=NULL &&
D->RedirNameSize>0 && D->RedirNameSize<100000)
wcsncpyz(D->RedirName,hd->RedirName,D->RedirNameSize);
D->DirTarget=hd->DirTarget;
}
catch (RAR_EXIT ErrCode)
{
return Data->Cmd.DllError!=0 ? Data->Cmd.DllError : RarErrorToDll(ErrCode);
}
return ERAR_SUCCESS;
}
int PASCAL ProcessFile(HANDLE hArcData,int Operation,char *DestPath,char *DestName,wchar *DestPathW,wchar *DestNameW)
{
DataSet *Data=(DataSet *)hArcData;
try
{
Data->Cmd.DllError=0;
if (Data->OpenMode==RAR_OM_LIST || Data->OpenMode==RAR_OM_LIST_INCSPLIT ||
Operation==RAR_SKIP && !Data->Arc.Solid)
{
if (Data->Arc.Volume && Data->Arc.GetHeaderType()==HEAD_FILE &&
Data->Arc.FileHead.SplitAfter)
if (MergeArchive(Data->Arc,NULL,false,'L'))
{
Data->Arc.Seek(Data->Arc.CurBlockPos,SEEK_SET);
return ERAR_SUCCESS;
}
else
return ERAR_EOPEN;
Data->Arc.SeekToNext();
}
else
{
Data->Cmd.DllOpMode=Operation;
*Data->Cmd.ExtrPath=0;
*Data->Cmd.DllDestName=0;
if (DestPath!=NULL)
{
char ExtrPathA[NM];
strncpyz(ExtrPathA,DestPath,ASIZE(ExtrPathA)-2);
#ifdef _WIN_ALL
// We must not apply OemToCharBuffA directly to DestPath,
// because we do not know DestPath length and OemToCharBuffA
// does not stop at 0.
OemToCharA(ExtrPathA,ExtrPathA);
#endif
CharToWide(ExtrPathA,Data->Cmd.ExtrPath,ASIZE(Data->Cmd.ExtrPath));
AddEndSlash(Data->Cmd.ExtrPath,ASIZE(Data->Cmd.ExtrPath));
}
if (DestName!=NULL)
{
char DestNameA[NM];
strncpyz(DestNameA,DestName,ASIZE(DestNameA)-2);
#ifdef _WIN_ALL
// We must not apply OemToCharBuffA directly to DestName,
// because we do not know DestName length and OemToCharBuffA
// does not stop at 0.
OemToCharA(DestNameA,DestNameA);
#endif
CharToWide(DestNameA,Data->Cmd.DllDestName,ASIZE(Data->Cmd.DllDestName));
}
if (DestPathW!=NULL)
{
wcsncpy(Data->Cmd.ExtrPath,DestPathW,ASIZE(Data->Cmd.ExtrPath));
AddEndSlash(Data->Cmd.ExtrPath,ASIZE(Data->Cmd.ExtrPath));
}
if (DestNameW!=NULL)
wcsncpyz(Data->Cmd.DllDestName,DestNameW,ASIZE(Data->Cmd.DllDestName));
wcsncpyz(Data->Cmd.Command,Operation==RAR_EXTRACT ? L"X":L"T",ASIZE(Data->Cmd.Command));
Data->Cmd.Test=Operation!=RAR_EXTRACT;
bool Repeat=false;
Data->Extract.ExtractCurrentFile(Data->Arc,Data->HeaderSize,Repeat);
// Now we process extra file information if any.
//
// Archive can be closed if we process volumes, next volume is missing
// and current one is already removed or deleted. So we need to check
// if archive is still open to avoid calling file operations on
// the invalid file handle. Some of our file operations like Seek()
// process such invalid handle correctly, some not.
while (Data->Arc.IsOpened() && Data->Arc.ReadHeader()!=0 &&
Data->Arc.GetHeaderType()==HEAD_SERVICE)
{
Data->Extract.ExtractCurrentFile(Data->Arc,Data->HeaderSize,Repeat);
Data->Arc.SeekToNext();
}
Data->Arc.Seek(Data->Arc.CurBlockPos,SEEK_SET);
}
}
catch (std::bad_alloc&)
{
return ERAR_NO_MEMORY;
}
catch (RAR_EXIT ErrCode)
{
return Data->Cmd.DllError!=0 ? Data->Cmd.DllError : RarErrorToDll(ErrCode);
}
return Data->Cmd.DllError;
}
int PASCAL RARProcessFile(HANDLE hArcData,int Operation,char *DestPath,char *DestName)
{
return ProcessFile(hArcData,Operation,DestPath,DestName,NULL,NULL);
}
int PASCAL RARProcessFileW(HANDLE hArcData,int Operation,wchar *DestPath,wchar *DestName)
{
return ProcessFile(hArcData,Operation,NULL,NULL,DestPath,DestName);
}
void PASCAL RARSetChangeVolProc(HANDLE hArcData,CHANGEVOLPROC ChangeVolProc)
{
DataSet *Data=(DataSet *)hArcData;
Data->Cmd.ChangeVolProc=ChangeVolProc;
}
void PASCAL RARSetCallback(HANDLE hArcData,UNRARCALLBACK Callback,LPARAM UserData)
{
DataSet *Data=(DataSet *)hArcData;
Data->Cmd.Callback=Callback;
Data->Cmd.UserData=UserData;
}
void PASCAL RARSetProcessDataProc(HANDLE hArcData,PROCESSDATAPROC ProcessDataProc)
{
DataSet *Data=(DataSet *)hArcData;
Data->Cmd.ProcessDataProc=ProcessDataProc;
}
void PASCAL RARSetPassword(HANDLE hArcData,char *Password)
{
#ifndef RAR_NOCRYPT
DataSet *Data=(DataSet *)hArcData;
wchar PasswordW[MAXPASSWORD];
GetWideName(Password,NULL,PasswordW,ASIZE(PasswordW));
Data->Cmd.Password.Set(PasswordW);
cleandata(PasswordW,sizeof(PasswordW));
#endif
}
int PASCAL RARGetDllVersion(void)
{
return RAR_DLL_VERSION;
}
static int RarErrorToDll(RAR_EXIT ErrCode)
{
switch(ErrCode)
{
case RARX_FATAL:
case RARX_READ:
return ERAR_EREAD;
case RARX_CRC:
return ERAR_BAD_DATA;
case RARX_WRITE:
return ERAR_EWRITE;
case RARX_OPEN:
return ERAR_EOPEN;
case RARX_CREATE:
return ERAR_ECREATE;
case RARX_MEMORY:
return ERAR_NO_MEMORY;
case RARX_BADPWD:
return ERAR_BAD_PASSWORD;
case RARX_SUCCESS:
return ERAR_SUCCESS; // 0.
default:
return ERAR_UNKNOWN;
}
}
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