/*
* Read the specified tile and setup for decoding.
* The data buffer is expanded, as necessary, to
* hold the tile's data.
*/
static int
TIFFFillTile(TIFF* tif, ttile_t tile)
{
static const char module[] = "TIFFFillTile";
TIFFDirectory *td = &tif->tif_dir;
tsize_t bytecount;
bytecount = td->td_stripbytecount[tile];
if (isMapped(tif) &&
(td->td_fillorder == tif->tif_fillorder || (tif->tif_flags & TIFF_NOBITREV))) {
/*
* The image is mapped into memory and we either don't
* need to flip bits or the compression routine is going
* to handle this operation itself. In this case, avoid
* copying the raw data and instead just reference the
* data from the memory mapped file image. This assumes
* that the decompression routines do not modify the
* contents of the raw data buffer (if they try to,
* the application will get a fault since the file is
* mapped read-only).
*/
if ((tif->tif_flags & TIFF_MYBUFFER) && tif->tif_rawdata)
_TIFFfree(tif->tif_rawdata);
tif->tif_flags &= ~TIFF_MYBUFFER;
if (td->td_stripoffset[tile] + bytecount > tif->tif_size) {
tif->tif_curtile = -1; /* unknown state */
return (0);
}
tif->tif_rawdatasize = bytecount;
tif->tif_rawdata = tif->tif_base + td->td_stripoffset[tile];
} else {
/*
* Expand raw data buffer, if needed, to
* hold data tile coming from file
* (perhaps should set upper bound on
* the size of a buffer we'll use?).
*/
if (bytecount > tif->tif_rawdatasize) {
tif->tif_curtile = -1; /* unknown state */
if ((tif->tif_flags & TIFF_MYBUFFER) == 0) {
TIFFError(module,
"%s: Data buffer too small to hold tile %ld",
tif->tif_name, (long) tile);
return (0);
}
if (!TIFFReadBufferSetup(tif, 0,
roundup(bytecount, 1024)))
return (0);
}
if (TIFFReadRawTile1(tif, tile, (u_char *)tif->tif_rawdata,
bytecount, module) != bytecount)
return (0);
if (td->td_fillorder != tif->tif_fillorder &&
(tif->tif_flags & TIFF_NOBITREV) == 0)
TIFFReverseBits(tif->tif_rawdata, bytecount);
}
return (TIFFStartTile(tif, tile));
}
/*
* Read the specified tile and setup for decoding. The data buffer is
* expanded, as necessary, to hold the tile's data.
*/
int
TIFFFillTile(TIFF* tif, ttile_t tile)
{
static const char module[] = "TIFFFillTile";
TIFFDirectory *td = &tif->tif_dir;
if ((tif->tif_flags&TIFF_NOREADRAW)==0)
{
/*
* FIXME: butecount should have tsize_t type, but for now
* libtiff defines tsize_t as a signed 32-bit integer and we
* are losing ability to read arrays larger than 2^31 bytes.
* So we are using uint32 instead of tsize_t here.
*/
uint32 bytecount = td->td_stripbytecount[tile];
if (bytecount <= 0) {
TIFFErrorExt(tif->tif_clientdata, tif->tif_name,
"%lu: Invalid tile byte count, tile %lu",
(unsigned long) bytecount, (unsigned long) tile);
return (0);
}
if (isMapped(tif) &&
(isFillOrder(tif, td->td_fillorder)
|| (tif->tif_flags & TIFF_NOBITREV))) {
/*
* The image is mapped into memory and we either don't
* need to flip bits or the compression routine is
* going to handle this operation itself. In this
* case, avoid copying the raw data and instead just
* reference the data from the memory mapped file
* image. This assumes that the decompression
* routines do not modify the contents of the raw data
* buffer (if they try to, the application will get a
* fault since the file is mapped read-only).
*/
if ((tif->tif_flags & TIFF_MYBUFFER) && tif->tif_rawdata)
_TIFFfree(tif->tif_rawdata);
tif->tif_flags &= ~TIFF_MYBUFFER;
/*
* We must check for overflow, potentially causing
* an OOB read. Instead of simple
*
* td->td_stripoffset[tile]+bytecount > tif->tif_size
*
* comparison (which can overflow) we do the following
* two comparisons:
*/
if (bytecount > tif->tif_size ||
td->td_stripoffset[tile] > tif->tif_size - bytecount) {
tif->tif_curtile = NOTILE;
return (0);
}
tif->tif_rawdatasize = bytecount;
tif->tif_rawdata =
tif->tif_base + td->td_stripoffset[tile];
} else {
/*
* Expand raw data buffer, if needed, to hold data
* tile coming from file (perhaps should set upper
* bound on the size of a buffer we'll use?).
*/
if (bytecount > (uint32)tif->tif_rawdatasize) {
tif->tif_curtile = NOTILE;
if ((tif->tif_flags & TIFF_MYBUFFER) == 0) {
TIFFErrorExt(tif->tif_clientdata,
module,
"%s: Data buffer too small to hold tile %ld",
tif->tif_name,
(long) tile);
return (0);
}
if (!TIFFReadBufferSetup(tif, 0,
TIFFroundup(bytecount, 1024)))
return (0);
}
if ((uint32)TIFFReadRawTile1(tif, tile,
(unsigned char *)tif->tif_rawdata,
bytecount, module) != bytecount)
return (0);
if (!isFillOrder(tif, td->td_fillorder) &&
(tif->tif_flags & TIFF_NOBITREV) == 0)
TIFFReverseBits(tif->tif_rawdata, bytecount);
}
}
return (TIFFStartTile(tif, tile));
}
/*
* Read the specified tile and setup for decoding. The data buffer is
* expanded, as necessary, to hold the tile's data.
*/
int
TIFFFillTile(TIFF* tif, uint32 tile)
{
static const char module[] = "TIFFFillTile";
TIFFDirectory *td = &tif->tif_dir;
if (!_TIFFFillStriles( tif ) || !tif->tif_dir.td_stripbytecount)
return 0;
if ((tif->tif_flags&TIFF_NOREADRAW)==0)
{
uint64 bytecount = td->td_stripbytecount[tile];
if ((int64)bytecount <= 0) {
#if defined(__WIN32__) && (defined(_MSC_VER) || defined(__MINGW32__))
TIFFErrorExt(tif->tif_clientdata, module,
"%I64u: Invalid tile byte count, tile %lu",
(unsigned __int64) bytecount,
(unsigned long) tile);
#else
TIFFErrorExt(tif->tif_clientdata, module,
"%llu: Invalid tile byte count, tile %lu",
(unsigned long long) bytecount,
(unsigned long) tile);
#endif
return (0);
}
/* To avoid excessive memory allocations: */
/* Byte count should normally not be larger than a number of */
/* times the uncompressed size plus some margin */
if( bytecount > 1024 * 1024 )
{
/* 10 and 4096 are just values that could be adjusted. */
/* Hopefully they are safe enough for all codecs */
tmsize_t stripsize = TIFFTileSize(tif);
if( stripsize != 0 &&
(bytecount - 4096) / 10 > (uint64)stripsize )
{
uint64 newbytecount = (uint64)stripsize * 10 + 4096;
if( (int64)newbytecount >= 0 )
{
#if defined(__WIN32__) && (defined(_MSC_VER) || defined(__MINGW32__))
TIFFWarningExt(tif->tif_clientdata, module,
"Too large tile byte count %I64u, tile %lu. Limiting to %I64u",
(unsigned __int64) bytecount,
(unsigned long) tile,
(unsigned __int64) newbytecount);
#else
TIFFErrorExt(tif->tif_clientdata, module,
"Too large tile byte count %llu, tile %lu. Limiting to %llu",
(unsigned long long) bytecount,
(unsigned long) tile,
(unsigned long long) newbytecount);
#endif
bytecount = newbytecount;
}
}
}
if (isMapped(tif)) {
/*
* We must check for overflow, potentially causing
* an OOB read. Instead of simple
*
* td->td_stripoffset[tile]+bytecount > tif->tif_size
*
* comparison (which can overflow) we do the following
* two comparisons:
*/
if (bytecount > (uint64)tif->tif_size ||
td->td_stripoffset[tile] > (uint64)tif->tif_size - bytecount) {
tif->tif_curtile = NOTILE;
return (0);
}
}
if (isMapped(tif) &&
(isFillOrder(tif, td->td_fillorder)
|| (tif->tif_flags & TIFF_NOBITREV))) {
/*
* The image is mapped into memory and we either don't
* need to flip bits or the compression routine is
* going to handle this operation itself. In this
* case, avoid copying the raw data and instead just
* reference the data from the memory mapped file
* image. This assumes that the decompression
* routines do not modify the contents of the raw data
* buffer (if they try to, the application will get a
* fault since the file is mapped read-only).
*/
if ((tif->tif_flags & TIFF_MYBUFFER) && tif->tif_rawdata) {
_TIFFfree(tif->tif_rawdata);
tif->tif_rawdata = NULL;
tif->tif_rawdatasize = 0;
}
tif->tif_flags &= ~TIFF_MYBUFFER;
tif->tif_rawdatasize = (tmsize_t)bytecount;
tif->tif_rawdata =
tif->tif_base + (tmsize_t)td->td_stripoffset[tile];
tif->tif_rawdataoff = 0;
tif->tif_rawdataloaded = (tmsize_t) bytecount;
tif->tif_flags |= TIFF_BUFFERMMAP;
} else {
/*
* Expand raw data buffer, if needed, to hold data
* tile coming from file (perhaps should set upper
* bound on the size of a buffer we'll use?).
*/
tmsize_t bytecountm;
bytecountm=(tmsize_t)bytecount;
if ((uint64)bytecountm!=bytecount)
{
TIFFErrorExt(tif->tif_clientdata,module,"Integer overflow");
return(0);
}
if (bytecountm > tif->tif_rawdatasize) {
tif->tif_curtile = NOTILE;
if ((tif->tif_flags & TIFF_MYBUFFER) == 0) {
TIFFErrorExt(tif->tif_clientdata, module,
"Data buffer too small to hold tile %lu",
(unsigned long) tile);
return (0);
}
}
if (tif->tif_flags&TIFF_BUFFERMMAP) {
tif->tif_curtile = NOTILE;
tif->tif_rawdata = NULL;
tif->tif_rawdatasize = 0;
tif->tif_flags &= ~TIFF_BUFFERMMAP;
}
if( isMapped(tif) )
{
if (bytecountm > tif->tif_rawdatasize &&
!TIFFReadBufferSetup(tif, 0, bytecountm))
{
return (0);
}
if (TIFFReadRawTile1(tif, tile, tif->tif_rawdata,
bytecountm, module) != bytecountm)
{
return (0);
}
}
else
{
if (TIFFReadRawStripOrTile2(tif, tile, 0,
bytecountm, module) != bytecountm)
{
return (0);
}
}
tif->tif_rawdataoff = 0;
tif->tif_rawdataloaded = bytecountm;
if (!isFillOrder(tif, td->td_fillorder) &&
(tif->tif_flags & TIFF_NOBITREV) == 0)
TIFFReverseBits(tif->tif_rawdata,
tif->tif_rawdataloaded);
}
}
return (TIFFStartTile(tif, tile));
}
/*
* Read the specified tile and setup for decoding. The data buffer is
* expanded, as necessary, to hold the tile's data.
*/
int
TIFFFillTile(TIFF* tif, uint32 tile)
{
static const char module[] = "TIFFFillTile";
TIFFDirectory *td = &tif->tif_dir;
if (!_TIFFFillStriles( tif ) || !tif->tif_dir.td_stripbytecount)
return 0;
if ((tif->tif_flags&TIFF_NOREADRAW)==0)
{
uint64 bytecount = td->td_stripbytecount[tile];
if ((int64)bytecount <= 0) {
TIFFErrorExt(tif->tif_clientdata, module,
TIFF_UINT64_FORMAT ": Invalid tile byte count, tile %lu",
(TIFF_UINT64_T) bytecount,
(unsigned long) tile);
return (0);
}
if (isMapped(tif) &&
(isFillOrder(tif, td->td_fillorder)
|| (tif->tif_flags & TIFF_NOBITREV))) {
/*
* The image is mapped into memory and we either don't
* need to flip bits or the compression routine is
* going to handle this operation itself. In this
* case, avoid copying the raw data and instead just
* reference the data from the memory mapped file
* image. This assumes that the decompression
* routines do not modify the contents of the raw data
* buffer (if they try to, the application will get a
* fault since the file is mapped read-only).
*/
if ((tif->tif_flags & TIFF_MYBUFFER) && tif->tif_rawdata) {
_TIFFfree(tif->tif_rawdata);
tif->tif_rawdata = NULL;
tif->tif_rawdatasize = 0;
}
tif->tif_flags &= ~TIFF_MYBUFFER;
/*
* We must check for overflow, potentially causing
* an OOB read. Instead of simple
*
* td->td_stripoffset[tile]+bytecount > tif->tif_size
*
* comparison (which can overflow) we do the following
* two comparisons:
*/
if (bytecount > (uint64)tif->tif_size ||
td->td_stripoffset[tile] > (uint64)tif->tif_size - bytecount) {
tif->tif_curtile = NOTILE;
return (0);
}
tif->tif_rawdatasize = (tmsize_t)bytecount;
tif->tif_rawdata =
tif->tif_base + (tmsize_t)td->td_stripoffset[tile];
tif->tif_rawdataoff = 0;
tif->tif_rawdataloaded = (tmsize_t) bytecount;
tif->tif_flags |= TIFF_BUFFERMMAP;
} else {
/*
* Expand raw data buffer, if needed, to hold data
* tile coming from file (perhaps should set upper
* bound on the size of a buffer we'll use?).
*/
tmsize_t bytecountm;
bytecountm=(tmsize_t)bytecount;
if ((uint64)bytecountm!=bytecount)
{
TIFFErrorExt(tif->tif_clientdata,module,"Integer overflow");
return(0);
}
if (bytecountm > tif->tif_rawdatasize) {
tif->tif_curtile = NOTILE;
if ((tif->tif_flags & TIFF_MYBUFFER) == 0) {
TIFFErrorExt(tif->tif_clientdata, module,
"Data buffer too small to hold tile %lu",
(unsigned long) tile);
return (0);
}
if (!TIFFReadBufferSetup(tif, 0, bytecountm))
return (0);
}
if (tif->tif_flags&TIFF_BUFFERMMAP) {
tif->tif_curtile = NOTILE;
if (!TIFFReadBufferSetup(tif, 0, bytecountm))
return (0);
}
if (TIFFReadRawTile1(tif, tile, tif->tif_rawdata,
bytecountm, module) != bytecountm)
return (0);
tif->tif_rawdataoff = 0;
tif->tif_rawdataloaded = bytecountm;
if (!isFillOrder(tif, td->td_fillorder) &&
(tif->tif_flags & TIFF_NOBITREV) == 0)
TIFFReverseBits(tif->tif_rawdata,
tif->tif_rawdataloaded);
}
}
return (TIFFStartTile(tif, tile));
}
