1 files changed, 184 insertions, 0 deletions
diff --git a/utils/newdat/newdat.cpp b/utils/newdat/newdat.cpp
new file mode 100644
index 0000000..d03439a
--- /dev/null
+++ b/utils/newdat/newdat.cpp
@@ -0,0 +1,184 @@
+//========= Copyright Valve Corporation, All rights reserved. ============//
+//
+// Purpose: Makes .DAT files
+//
+// $Workfile:     $
+// $Date:         $
+//
+//-----------------------------------------------------------------------------
+// $Log: $
+//
+// $NoKeywords: $
+//=============================================================================//
+
+#include <stdio.h>
+#include <string.h>
+#include <stdarg.h>
+#include <stdlib.h>
+#include "basetypes.h"
+#include "checksum_md5.h"
+#include "tier1/strtools.h"
+
+void Sys_Error( char *fmt, ... );
+extern void Con_Printf( char *fmt, ... );
+
+// So we can link CRC
+int LittleLongFn( int l );
+int (*LittleLong)(int l) = LittleLongFn;
+
+
+// So we can link CRC
+void Sys_Error( char *fmt, ... )
+{
+	va_list args;
+	va_start( args, fmt );
+	vprintf( fmt, args );
+	exit(0);
+}
+
+// So we can link CRC
+int COM_FindFile( char *filename, FILE **file )
+{
+	if ( file )
+	{
+		*file = fopen( filename, "rb" );
+		if ( *file )
+			return 1;
+	}
+	return 0;
+}
+
+// So we can link CRC
+int LittleLongFn( int l )
+{
+	return l;
+}
+
+// So we can link CRC
+void Con_Printf( char *fmt, ... )
+{
+	va_list args;
+	va_start( args, fmt );
+	vprintf( fmt, args );
+}
+
+bool MD5_Hash_File(unsigned char digest[16], char *pszFileName, bool bUsefopen /* = FALSE */, bool bSeed /* = FALSE */, unsigned int seed[4] /* = NULL */)
+{
+	FILE *fp;
+	byte chunk[1024];
+	int nBytesRead;
+	MD5Context_t ctx;
+	
+	int nSize;
+
+	if (!bUsefopen)
+	{
+		nSize = COM_FindFile(pszFileName, &fp);
+		if ( !fp || ( nSize == -1 ) )
+			return false;
+	}
+	else
+	{
+		fp = fopen( pszFileName, "rb" );
+		if ( !fp )
+			return false;
+
+		fseek ( fp, 0, SEEK_END );
+		nSize = ftell ( fp );
+		fseek ( fp, 0, SEEK_SET );
+
+		if ( nSize <= 0 )
+		{
+			fclose ( fp );
+			return false;
+		}
+	}
+
+	memset(&ctx, 0, sizeof(MD5Context_t));
+
+	MD5Init(&ctx);
+
+	if (bSeed)
+	{
+		// Seed the hash with the seed value
+		MD5Update( &ctx, (const unsigned char *)&seed[0], 16 );
+	}
+
+	// Now read in 1K chunks
+	while (nSize > 0)
+	{
+		if (nSize > 1024)
+			nBytesRead = fread(chunk, 1, 1024, fp);
+		else
+			nBytesRead = fread(chunk, 1, nSize, fp);
+
+		// If any data was received, CRC it.
+		if (nBytesRead > 0)
+		{
+			nSize -= nBytesRead;
+			MD5Update(&ctx, chunk, nBytesRead);
+		}
+
+		// We we are end of file, break loop and return
+		if ( feof( fp ) )
+		{
+			fclose( fp );
+			fp = NULL;
+			break;
+		}
+		// If there was a disk error, indicate failure.
+		else if ( ferror(fp) )
+		{
+			if ( fp )
+				fclose(fp);
+			return FALSE;
+		}
+	}	
+
+	if ( fp )
+		fclose(fp);
+
+	MD5Final(digest, &ctx);
+
+	return TRUE;
+}
+
+//-----------------------------------------------------------------------------
+// Purpose: newdat.exe - makes the .DAT signature for file / virus checking
+// Input  : argc - std args
+//			*argv[] - 
+// Output : int 0 == success. 1 == failure
+//-----------------------------------------------------------------------------
+int main( int argc, char *argv[] )
+{
+	char out[512], datFile[512];
+	unsigned char digest[16];
+
+	if ( argc < 2 )
+	{
+		printf("USAGE: newdat <filename>\n" );
+		return 1;
+	}
+
+
+	// Get the filename without the extension
+	Q_StripExtension( argv[1], out, sizeof( out ) );
+	sprintf( datFile, "%s.dat", out );
+
+	// Build the MD5 hash for the .EXE file
+	MD5_Hash_File( digest, argv[1], TRUE, FALSE, NULL );
+
+	// Write the first 4 bytes of the MD5 hash as the signature ".dat" file
+	FILE *fp = fopen( datFile, "wb" );
+	if ( fp )
+	{
+		fwrite( digest, sizeof(int), 1, fp );
+		fclose( fp );
+		printf("Wrote %s\n", datFile );
+		return 0;
+	}
+	else
+		printf("Can't open %s\n", datFile );
+
+	return 1;
+}