pgpsdadecode.c

PGP8.0源码 请认真阅读您的文件包然后写出其具体功能

#if E_BUSNIESS_SERVER || PGPREADER
				sCreateDir(gpi->szPrefixPath, gpi->FileName);
#else /* !E_BUSINESS_SERVER && !PGPREADER */
#ifdef WIN32
				_mkdir(dirname);
#else /* !WIN32 */
				mkdir(dirname, 0700);
#endif /* WIN32 */
#endif /* E_BUSINESS_SERVER || PGPREADER */

				// Keep track of it so we can delete it later
				FileListFromFile(&gpi->fl,dirname,NULL);
				gpi->fl->IsDirectory=TRUE;

				gpi->bFeedFilename=TRUE;
			}
			// Create zero length file and get next
			else if (gpi->FileSize==0)
			{
				char inname[MAX_PATH];
				char outname[MAX_PATH];

				strcpy(inname,gpi->szPrefixPath);
				strcat(inname,gpi->FileName);

				Event.type=kSDAEvent_NewFileEvent;
				Event.data.newfileData.fileName=inname;

				err=(gpi->UserProc)(NULL,&Event,gpi->pUserValue);

				if(IsPGPError(err))
				{
					gpi->err=err;
					return 1;
				}

				Event.type=kSDAEvent_AskFileEvent;
				Event.data.askfileData.inName=inname;
				Event.data.askfileData.outName=outname;

				err=(gpi->UserProc)(NULL,&Event,gpi->pUserValue);

				if(IsPGPError(err))
				{
					gpi->err=err;
					return 1;
				}

#if E_BUSNIESS_SERVER || PGPREADER
#ifdef WIN32
				gpi->fout=fopen(outname,"wb");
#else /* !WIN32 */
#ifdef NO_64INT
				gpi->fout=fopen(outname, "wb");
#else /* NO_64INT */
				gpi->fout=fopen64(outname, "wb");
#endif /* NO_64INT */
#endif /* WIN32 */
#else /* !E_BUSINESS_SERVER && !PGPREADER */
				gpi->fout=fopen(outname,"wb");
#endif /* E_BUSINESS_SERVER || PGPREADER */

				if(gpi->fout==0)
				{
					// Can't create the file
					gpi->err=kPGPError_FileOpFailed;

					Event.type=kSDAEvent_ErrorEvent;
					Event.data.errorData.fileName=outname;
					Event.data.errorData.err=gpi->err;

					err=(gpi->UserProc)(NULL,&Event,gpi->pUserValue);
					return 1;
				}

				// Keep track of it so we can delete it later
				FileListFromFile(&gpi->fl,outname,NULL);

				fclose(gpi->fout);
				gpi->fout=NULL;
				gpi->bFeedFilename=TRUE;
			}
			// Prepare for real data for file
			else
			{
				char inname[MAX_PATH];
				char outname[MAX_PATH];

#ifndef WIN32
				/*
				 *	Change directory separator from '\\' to '/' for Unix systems.
				 */
				char szDirWinSeps[] = "\\";
				char *pNext = NULL;
				
				pNext = strstr(gpi->szPrefixPath, szDirWinSeps);
				while(pNext != NULL)
				{
				 	pNext[0] = '/';
					pNext = strstr(pNext, szDirWinSeps);
				}
				pNext = strstr(gpi->FileName, szDirWinSeps);
				while(pNext != NULL)
				{
					pNext[0] = '/';
					pNext = strstr(pNext, szDirWinSeps);
				}
#endif /* WIN32 */

				strcpy(inname,gpi->szPrefixPath);
				strcat(inname,gpi->FileName);

				Event.type=kSDAEvent_NewFileEvent;
				Event.data.newfileData.fileName=inname;

				err=(gpi->UserProc)(NULL,&Event,gpi->pUserValue);

				if(IsPGPError(err))
				{
					gpi->err=err;
					return 1;
				}

				Event.type=kSDAEvent_AskFileEvent;
				Event.data.askfileData.inName=inname;
				Event.data.askfileData.outName=outname;

				err=(gpi->UserProc)(NULL,&Event,gpi->pUserValue);

				if(IsPGPError(err))
				{
					gpi->err=err;
					return 1;
				}

				gpi->bFeedFilename=FALSE;
#if E_BUSINESS_SERVER || PGPREADER
#ifdef WIN32
				gpi->fout=fopen(outname,"wb");
#else /* !WIN32 */
#ifdef NO_64INT
				gpi->fout=fopen(outname, "wb");
#else /* !NO_64INT */
				gpi->fout=fopen64(outname, "wb");
#endif /* NO_64INT */
#endif /* WIN32 || PGP_UNIX_LINUX */
#else /* !E_BUSINESS_SERVER && !PGPREADER */
				gpi->fout=fopen(outname,"wb");
#endif /* E_BUSINESS_SERVER || PGPREADER */
			
				if(gpi->fout==0)
				{
#if E_BUSINESS_SERVER || PGPREADER
					char	szFilename[256] = {'\0'};
					char	*pszLast = NULL;
					char	szDir[256] = {'\0'};

					if(gpi->FileName[0] != szDirSeps[0])
					{
						sprintf(szFilename, "%s%s", szDirSeps, gpi->FileName);
					}
					else
						strcpy(szFilename, gpi->FileName);
					pszLast = strrchr(szFilename, szDirSeps[0]);
					if(pszLast != NULL)
						*pszLast = '\0';
					sCreateDir(gpi->szPrefixPath, szFilename);
					strcpy(inname, gpi->szPrefixPath);
					if(gpi->szPrefixPath[strlen(gpi->szPrefixPath) - 1] != szDirSeps[0])
						strcat(inname, szDirSeps);
					strcat(inname, gpi->FileName[0] == szDirSeps[0] ? (char *)&gpi->FileName[1] : gpi->FileName);
					Event.type=kSDAEvent_AskFileEvent;
					Event.data.askfileData.inName=inname;
					Event.data.askfileData.outName=outname;
					err=(gpi->UserProc)(NULL,&Event,gpi->pUserValue);

					if(IsPGPError(err))
					{
						gpi->err=err;
						return 1;
					}
#ifdef WIN32
					gpi->fout = fopen(outname, "wb");
#else /* !WIN32 */
#ifdef NO_64INT
					gpi->fout = fopen(outname, "wb");
#else /* !NO_64INT */
					gpi->fout = fopen64(outname, "wb");
#endif /* NO_64INT */
#endif /* WIN32 || PGP_UNIX_LINUX */
					if(gpi->fout == NULL)
					{
						gpi->err=kPGPError_FileOpFailed;

						Event.type=kSDAEvent_ErrorEvent;
						Event.data.errorData.fileName=outname;
						Event.data.errorData.err=gpi->err;

						err=(gpi->UserProc)(NULL,&Event,gpi->pUserValue);

						return 1;
					}

#else /* !E_BUSINESS_SERVER && !PGPREADER */
					// Can't create the file
					gpi->err=kPGPError_FileOpFailed;

					Event.type=kSDAEvent_ErrorEvent;
					Event.data.errorData.fileName=outname;
					Event.data.errorData.err=gpi->err;

					err=(gpi->UserProc)(NULL,&Event,gpi->pUserValue);

					return 1;
#endif /* E_BUSINESS_SERVER || PGPREADER*/
				}

				// Keep track of it so we can delete it later
				FileListFromFile(&gpi->fl,outname,NULL);

				gpi->FileIndex=0;
			}
			gpi->FeedIndex=0;
		}

		return 1;
	}

	// Feed in the File!
	fputc(c,gpi->fout);
	gpi->FileIndex++;

	if(gpi->FileIndex==gpi->FileSize)
	{
		fclose(gpi->fout);
		gpi->fout=NULL;
		gpi->bFeedFilename=TRUE;
	}

	return 1;
}

void DoDecompress(void *gpi)
{
#if (NOCOMPRESSION_SEA || NOCOMPRESSION_SDA)
	int c;

	while((c=decomp_getc_buffer(gpi))!=EOF)
	{
		decomp_putc_buffer(c,gpi);
	}
#else
	Deflate_Decompress(gpi);
#endif
}

PGPError SDADecryptFiles(SDAHEADER *SDAHeader,
						PGPUInt32 *ExpandedKey,
						FILELIST **fl,
						char *szInFileName,
						char *szPrefixPath,
						SDACREATECALLBACK UserProc,void *pUserValue)
{
	FILE *fin;
	char inbuffer[kBlockSize];
	char outbuffer[kBlockSize];
	GETPUTINFO gpi;
	SDAEvent Event;

	memset(&gpi,0x00,sizeof(GETPUTINFO));
#if E_BUSINESS_SERVER || PGPREADER
#ifdef WIN32
	fin=fopen(szInFileName,"rb");
#else /* !WIN32 */
#ifdef NO_64INT
	fin=fopen(szInFileName,"rb");
#else /* !NO_64INT */
	fin=fopen64(szInFileName,"rb");
#endif /* NO_64INT */
#endif /* WIN32 */
#else /* !E_BUSINESS_SERVER && !PGPREADER */
	fin=fopen(szInFileName,"rb");
#endif /* E_BUSINESS_SERVER || PGPREADER */

	fseek(fin, SDAHeader->offset, SEEK_SET );

	gpi.fl=*fl;
	gpi.szPrefixPath=szPrefixPath;
	gpi.err=kPGPError_NoErr;
	gpi.fin=fin;
#ifdef NO_64INT
	gpi.NumFiles=SDAHeader->NumFiles[0];
#else /* !NO_64INT */
	gpi.NumFiles=SDAHeader->NumFiles;
#endif /* NO_64INT */
	gpi.SDAHeader=SDAHeader;
	gpi.ExpandedKey=ExpandedKey;
	gpi.blockindex=0;
	gpi.outbuffer=outbuffer;
	gpi.inbuffer=inbuffer;
#ifdef NO_64INT
	gpi.from_max=SDAHeader->CompLength[0];
#else /* !NO_64INT */
	gpi.from_max=SDAHeader->CompLength;
#endif /* NO_64INT */
	gpi.bFeedFilename=TRUE;
	gpi.UserProc=UserProc;
	gpi.pUserValue=pUserValue;

	DoDecompress(&gpi);

	// In case of cancellation or unknown abort
	if(gpi.fout!=NULL)
		fclose(gpi.fout);

	memset(inbuffer,0x00,kBlockSize);
	memset(outbuffer,0x00,kBlockSize);

	Event.type=kSDAEvent_ProgressEvent;
	Event.data.progressData.bytesWritten=gpi.from_max;
	Event.data.progressData.bytesTotal=gpi.from_max;

	(gpi.UserProc)(NULL,&Event,gpi.pUserValue);	

	fclose(fin);

	// Send back the filenames if its an SEA
	*fl=gpi.fl;

	return gpi.err;
}

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