-/* $Id: tif_dirread.c,v 1.218 2017-09-09 21:44:42 erouault Exp $ */
-
/*
* Copyright (c) 1988-1997 Sam Leffler
* Copyright (c) 1991-1997 Silicon Graphics, Inc.
static int TIFFFetchSubjectDistance(TIFF*, TIFFDirEntry*);
static void ChopUpSingleUncompressedStrip(TIFF*);
static uint64 TIFFReadUInt64(const uint8 *value);
+static int _TIFFGetMaxColorChannels(uint16 photometric);
static int _TIFFFillStrilesInternal( TIFF *tif, int loadStripByteCount );
static enum TIFFReadDirEntryErr TIFFReadDirEntryDataAndRealloc(
TIFF* tif, uint64 offset, tmsize_t size, void** pdest)
{
-#if SIZEOF_VOIDP == 8 || SIZEOF_SIZE_T == 8
+#if SIZEOF_SIZE_T == 8
tmsize_t threshold = INITIAL_THRESHOLD;
#endif
tmsize_t already_read = 0;
void* new_dest;
tmsize_t bytes_read;
tmsize_t to_read = size - already_read;
-#if SIZEOF_VOIDP == 8 || SIZEOF_SIZE_T == 8
+#if SIZEOF_SIZE_T == 8
if( to_read >= threshold && threshold < MAX_THRESHOLD )
{
to_read = threshold;
}
/*
+ * Return the maximum number of color channels specified for a given photometric
+ * type. 0 is returned if photometric type isn't supported or no default value
+ * is defined by the specification.
+ */
+static int _TIFFGetMaxColorChannels( uint16 photometric )
+{
+ switch (photometric) {
+ case PHOTOMETRIC_PALETTE:
+ case PHOTOMETRIC_MINISWHITE:
+ case PHOTOMETRIC_MINISBLACK:
+ return 1;
+ case PHOTOMETRIC_YCBCR:
+ case PHOTOMETRIC_RGB:
+ case PHOTOMETRIC_CIELAB:
+ case PHOTOMETRIC_LOGLUV:
+ case PHOTOMETRIC_ITULAB:
+ case PHOTOMETRIC_ICCLAB:
+ return 3;
+ case PHOTOMETRIC_SEPARATED:
+ case PHOTOMETRIC_MASK:
+ return 4;
+ case PHOTOMETRIC_LOGL:
+ case PHOTOMETRIC_CFA:
+ default:
+ return 0;
+ }
+}
+
+/*
* Read the next TIFF directory from a file and convert it to the internal
* format. We read directories sequentially.
*/
uint32 fii=FAILED_FII;
toff_t nextdiroff;
int bitspersample_read = FALSE;
+ int color_channels;
tif->tif_diroff=tif->tif_nextdiroff;
if (!TIFFCheckDirOffset(tif,tif->tif_nextdiroff))
}
}
}
+
+ /*
+ * Make sure all non-color channels are extrasamples.
+ * If it's not the case, define them as such.
+ */
+ color_channels = _TIFFGetMaxColorChannels(tif->tif_dir.td_photometric);
+ if (color_channels && tif->tif_dir.td_samplesperpixel - tif->tif_dir.td_extrasamples > color_channels) {
+ uint16 old_extrasamples;
+ uint16 *new_sampleinfo;
+
+ TIFFWarningExt(tif->tif_clientdata,module, "Sum of Photometric type-related "
+ "color channels and ExtraSamples doesn't match SamplesPerPixel. "
+ "Defining non-color channels as ExtraSamples.");
+
+ old_extrasamples = tif->tif_dir.td_extrasamples;
+ tif->tif_dir.td_extrasamples = (uint16) (tif->tif_dir.td_samplesperpixel - color_channels);
+
+ // sampleinfo should contain information relative to these new extra samples
+ new_sampleinfo = (uint16*) _TIFFcalloc(tif->tif_dir.td_extrasamples, sizeof(uint16));
+ if (!new_sampleinfo) {
+ TIFFErrorExt(tif->tif_clientdata, module, "Failed to allocate memory for "
+ "temporary new sampleinfo array (%d 16 bit elements)",
+ tif->tif_dir.td_extrasamples);
+ goto bad;
+ }
+
+ memcpy(new_sampleinfo, tif->tif_dir.td_sampleinfo, old_extrasamples * sizeof(uint16));
+ _TIFFsetShortArray(&tif->tif_dir.td_sampleinfo, new_sampleinfo, tif->tif_dir.td_extrasamples);
+ _TIFFfree(new_sampleinfo);
+ }
+
/*
* Verify Palette image has a Colormap.
*/
err=TIFFReadDirEntryByteArray(tif,dp,&data);
if (err==TIFFReadDirEntryErrOk)
{
- uint8* ma;
- uint32 mb;
+ uint32 mb = 0;
int n;
- ma=data;
- mb=0;
- while (mb<(uint32)dp->tdir_count)
+ if (data != NULL)
{
- if (*ma==0)
- break;
- ma++;
- mb++;
+ uint8* ma = data;
+ while (mb<(uint32)dp->tdir_count)
+ {
+ if (*ma==0)
+ break;
+ ma++;
+ mb++;
+ }
}
if (mb+1<(uint32)dp->tdir_count)
TIFFWarningExt(tif->tif_clientdata,module,"ASCII value for tag \"%s\" contains null byte in value; value incorrectly truncated during reading due to implementation limitations",fip->field_name);
if (err==TIFFReadDirEntryErrOk)
{
int m;
- if( dp->tdir_count > 0 && data[dp->tdir_count-1] != '\0' )
- {
- TIFFWarningExt(tif->tif_clientdata,module,"ASCII value for tag \"%s\" does not end in null byte. Forcing it to be null",fip->field_name);
- data[dp->tdir_count-1] = '\0';
- }
+ if( data != 0 && dp->tdir_count > 0 && data[dp->tdir_count-1] != '\0' )
+ {
+ TIFFWarningExt(tif->tif_clientdata,module,"ASCII value for tag \"%s\" does not end in null byte. Forcing it to be null",fip->field_name);
+ data[dp->tdir_count-1] = '\0';
+ }
m=TIFFSetField(tif,dp->tdir_tag,(uint16)(dp->tdir_count),data);
if (data!=0)
_TIFFfree(data);
if (err==TIFFReadDirEntryErrOk)
{
int m;
- if( dp->tdir_count > 0 && data[dp->tdir_count-1] != '\0' )
- {
- TIFFWarningExt(tif->tif_clientdata,module,"ASCII value for tag \"%s\" does not end in null byte. Forcing it to be null",fip->field_name);
- data[dp->tdir_count-1] = '\0';
- }
+ if( data != 0 && dp->tdir_count > 0 && data[dp->tdir_count-1] != '\0' )
+ {
+ TIFFWarningExt(tif->tif_clientdata,module,"ASCII value for tag \"%s\" does not end in null byte. Forcing it to be null",fip->field_name);
+ data[dp->tdir_count-1] = '\0';
+ }
m=TIFFSetField(tif,dp->tdir_tag,(uint32)(dp->tdir_count),data);
if (data!=0)
_TIFFfree(data);
if( nstrips == 0 )
return;
+ /* If we are going to allocate a lot of memory, make sure that the */
+ /* file is as big as needed */
+ if( tif->tif_mode == O_RDONLY &&
+ nstrips > 1000000 &&
+ (offset >= TIFFGetFileSize(tif) ||
+ stripbytes > (TIFFGetFileSize(tif) - offset) / (nstrips - 1)) )
+ {
+ return;
+ }
+
newcounts = (uint64*) _TIFFCheckMalloc(tif, nstrips, sizeof (uint64),
"for chopped \"StripByteCounts\" array");
newoffsets = (uint64*) _TIFFCheckMalloc(tif, nstrips, sizeof (uint64),
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