libtiff: fix CVE-2013-1961.

Upstream-Status: Backported

Issue Description: CVE-2013-1961
Stack-based buffer overflow in the t2p_write_pdf_page function in tiff2pdf
in libtiff before 4.0.3 allows remote attackers to cause a denial of service
(application crash) via a crafted image length and resolution in a TIFF image file.

Fix Description: Replace sprintf with snprintf

Signed-off-by: Priyanka Shobhan <priyanka_shobhan@mentor.com>
---

diff --git a/contrib/dbs/xtiff/xtiff.c b/contrib/dbs/xtiff/xtiff.c
index 2634030..97e4ffe 100644
--- a/contrib/dbs/xtiff/xtiff.c
+++ b/contrib/dbs/xtiff/xtiff.c
@@ -512,9 +512,9 @@ SetNameLabel()
     Arg args[1];
 
     if (tfMultiPage)
-        sprintf(buffer, "%s - page %d", fileName, tfDirectory);
+        snprintf(buffer, sizeof(buffer), "%s - page %d", fileName, tfDirectory);
     else
-        strcpy(buffer, fileName);
+        snprintf(buffer, sizeof(buffer), "%s", fileName);
     XtSetArg(args[0], XtNlabel, buffer);
     XtSetValues(labelWidget, args, 1);
 }
diff --git a/libtiff/tif_codec.c b/libtiff/tif_codec.c
index e201667..703e87d 100644
--- a/libtiff/tif_codec.c
+++ b/libtiff/tif_codec.c
@@ -108,7 +108,8 @@ _notConfigured(TIFF* tif)
 	const TIFFCodec* c = TIFFFindCODEC(tif->tif_dir.td_compression);
         char compression_code[20];
         
-        sprintf( compression_code, "%d", tif->tif_dir.td_compression );
+        snprintf(compression_code, sizeof(compression_code), "%d",
+		 tif->tif_dir.td_compression );
 	TIFFErrorExt(tif->tif_clientdata, tif->tif_name,
                      "%s compression support is not configured", 
                      c ? c->name : compression_code );
diff --git a/libtiff/tif_dirinfo.c b/libtiff/tif_dirinfo.c
index d319931..4dae5e5 100644
--- a/libtiff/tif_dirinfo.c
+++ b/libtiff/tif_dirinfo.c
@@ -711,7 +711,7 @@ _TIFFCreateAnonField(TIFF *tif, uint32 tag, TIFFDataType field_type)
 	 * note that this name is a special sign to TIFFClose() and
 	 * _TIFFSetupFields() to free the field
 	 */
-	sprintf(fld->field_name, "Tag %d", (int) tag);
+	snprintf(fld->field_name, 32, "Tag %d", (int) tag);
 
 	return fld;    
 }
diff --git a/tools/rgb2ycbcr.c b/tools/rgb2ycbcr.c
index 162aac1..a3eeb03 100644
--- a/tools/rgb2ycbcr.c
+++ b/tools/rgb2ycbcr.c
@@ -332,7 +332,8 @@ tiffcvt(TIFF* in, TIFF* out)
 	TIFFSetField(out, TIFFTAG_PLANARCONFIG, PLANARCONFIG_CONTIG);
 	{ char buf[2048];
 	  char *cp = strrchr(TIFFFileName(in), '/');
-	  sprintf(buf, "YCbCr conversion of %s", cp ? cp+1 : TIFFFileName(in));
+	  snprintf(buf, sizeof(buf), "YCbCr conversion of %s",
+		   cp ? cp+1 : TIFFFileName(in));
 	  TIFFSetField(out, TIFFTAG_IMAGEDESCRIPTION, buf);
 	}
 	TIFFSetField(out, TIFFTAG_SOFTWARE, TIFFGetVersion());
diff --git a/tools/tiff2bw.c b/tools/tiff2bw.c
index bda754a..7ffaca0 100644
--- a/tools/tiff2bw.c
+++ b/tools/tiff2bw.c
@@ -205,7 +205,7 @@ main(int argc, char* argv[])
 		}
 	}
 	TIFFSetField(out, TIFFTAG_PHOTOMETRIC, PHOTOMETRIC_MINISBLACK);
-	sprintf(thing, "B&W version of %s", argv[optind]);
+	snprintf(thing, sizeof(thing), "B&W version of %s", argv[optind]);
 	TIFFSetField(out, TIFFTAG_IMAGEDESCRIPTION, thing);
 	TIFFSetField(out, TIFFTAG_SOFTWARE, "tiff2bw");
 	outbuf = (unsigned char *)_TIFFmalloc(TIFFScanlineSize(out));
diff --git a/tools/tiff2pdf.c b/tools/tiff2pdf.c
index 356328c..957fd9f 100644
--- a/tools/tiff2pdf.c
+++ b/tools/tiff2pdf.c
@@ -3609,7 +3609,9 @@ tsize_t t2p_write_pdf_header(T2P* t2p, TIFF* output){
 	char buffer[16];
 	int buflen=0;
 	
-	buflen=sprintf(buffer, "%%PDF-%u.%u ", t2p->pdf_majorversion&0xff, t2p->pdf_minorversion&0xff);
+	buflen = snprintf(buffer, sizeof(buffer), "%%PDF-%u.%u ",
+			  t2p->pdf_majorversion&0xff,
+			  t2p->pdf_minorversion&0xff);
 	written += t2pWriteFile(output, (tdata_t) buffer, buflen);
 	written += t2pWriteFile(output, (tdata_t)"\n%\342\343\317\323\n", 7);
 
@@ -3623,10 +3625,10 @@ tsize_t t2p_write_pdf_header(T2P* t2p, TIFF* output){
 tsize_t t2p_write_pdf_obj_start(uint32 number, TIFF* output){
 
 	tsize_t written=0;
-	char buffer[16];
+	char buffer[32];
 	int buflen=0;
 
-	buflen=sprintf(buffer, "%lu", (unsigned long)number);
+	buflen=snprintf(buffer, sizeof(buffer), "%lu", (unsigned long)number);
 	written += t2pWriteFile(output, (tdata_t) buffer, buflen );
 	written += t2pWriteFile(output, (tdata_t) " 0 obj\n", 7);
 
@@ -3665,13 +3667,13 @@ tsize_t t2p_write_pdf_name(unsigned char* name, TIFF* output){
 	written += t2pWriteFile(output, (tdata_t) "/", 1);
 	for (i=0;i<namelen;i++){
 		if ( ((unsigned char)name[i]) < 0x21){
-			sprintf(buffer, "#%.2X", name[i]);
+			snprintf(buffer, sizeof(buffer), "#%.2X", name[i]);
 			buffer[sizeof(buffer) - 1] = '\0';
 			written += t2pWriteFile(output, (tdata_t) buffer, 3);
 			nextchar=1;
 		}
 		if ( ((unsigned char)name[i]) > 0x7E){
-			sprintf(buffer, "#%.2X", name[i]);
+			snprintf(buffer, sizeof(buffer), "#%.2X", name[i]);
 			buffer[sizeof(buffer) - 1] = '\0';
 			written += t2pWriteFile(output, (tdata_t) buffer, 3);
 			nextchar=1;
@@ -3679,57 +3681,57 @@ tsize_t t2p_write_pdf_name(unsigned char* name, TIFF* output){
 		if (nextchar==0){
 			switch (name[i]){
 				case 0x23:
-					sprintf(buffer, "#%.2X", name[i]);
+					snprintf(buffer, sizeof(buffer), "#%.2X", name[i]);
 					buffer[sizeof(buffer) - 1] = '\0';
 					written += t2pWriteFile(output, (tdata_t) buffer, 3);
 					break;
 				case 0x25:
-					sprintf(buffer, "#%.2X", name[i]);
+					snprintf(buffer, sizeof(buffer), "#%.2X", name[i]);
 					buffer[sizeof(buffer) - 1] = '\0';
 					written += t2pWriteFile(output, (tdata_t) buffer, 3);
 					break;
 				case 0x28:
-					sprintf(buffer, "#%.2X", name[i]);
+					snprintf(buffer, sizeof(buffer), "#%.2X", name[i]);
 					buffer[sizeof(buffer) - 1] = '\0';
 					written += t2pWriteFile(output, (tdata_t) buffer, 3);
 					break;
 				case 0x29:
-					sprintf(buffer, "#%.2X", name[i]); 
+					snprintf(buffer, sizeof(buffer), "#%.2X", name[i]); 
 					buffer[sizeof(buffer) - 1] = '\0';
 					written += t2pWriteFile(output, (tdata_t) buffer, 3);
 					break;
 				case 0x2F:
-					sprintf(buffer, "#%.2X", name[i]); 
+					snprintf(buffer, sizeof(buffer), "#%.2X", name[i]); 
 					buffer[sizeof(buffer) - 1] = '\0';
 					written += t2pWriteFile(output, (tdata_t) buffer, 3);
 					break;
 				case 0x3C:
-					sprintf(buffer, "#%.2X", name[i]); 
+					snprintf(buffer, sizeof(buffer), "#%.2X", name[i]); 
 					buffer[sizeof(buffer) - 1] = '\0';
 					written += t2pWriteFile(output, (tdata_t) buffer, 3);
 					break;
 				case 0x3E:
-					sprintf(buffer, "#%.2X", name[i]);
+					snprintf(buffer, sizeof(buffer), "#%.2X", name[i]);
 					buffer[sizeof(buffer) - 1] = '\0';
 					written += t2pWriteFile(output, (tdata_t) buffer, 3);
 					break;
 				case 0x5B:
-					sprintf(buffer, "#%.2X", name[i]); 
+					snprintf(buffer, sizeof(buffer), "#%.2X", name[i]); 
 					buffer[sizeof(buffer) - 1] = '\0';
 					written += t2pWriteFile(output, (tdata_t) buffer, 3);
 					break;
 				case 0x5D:
-					sprintf(buffer, "#%.2X", name[i]);
+					snprintf(buffer, sizeof(buffer), "#%.2X", name[i]);
 					buffer[sizeof(buffer) - 1] = '\0';
 					written += t2pWriteFile(output, (tdata_t) buffer, 3);
 					break;
 				case 0x7B:
-					sprintf(buffer, "#%.2X", name[i]); 
+					snprintf(buffer, sizeof(buffer), "#%.2X", name[i]); 
 					buffer[sizeof(buffer) - 1] = '\0';
 					written += t2pWriteFile(output, (tdata_t) buffer, 3);
 					break;
 				case 0x7D:
-					sprintf(buffer, "#%.2X", name[i]); 
+					snprintf(buffer, sizeof(buffer), "#%.2X", name[i]); 
 					buffer[sizeof(buffer) - 1] = '\0';
 					written += t2pWriteFile(output, (tdata_t) buffer, 3);
 					break;
@@ -3844,14 +3846,14 @@ tsize_t t2p_write_pdf_stream_end(TIFF* output){
 tsize_t t2p_write_pdf_stream_dict(tsize_t len, uint32 number, TIFF* output){
 	
 	tsize_t written=0;
-	char buffer[16];
+	char buffer[32];
 	int buflen=0;
 	
 	written += t2pWriteFile(output, (tdata_t) "/Length ", 8);
 	if(len!=0){
 		written += t2p_write_pdf_stream_length(len, output);
 	} else {
-		buflen=sprintf(buffer, "%lu", (unsigned long)number);
+		buflen=snprintf(buffer, sizeof(buffer), "%lu", (unsigned long)number);
 		written += t2pWriteFile(output, (tdata_t) buffer, buflen);
 		written += t2pWriteFile(output, (tdata_t) " 0 R \n", 6);
 	}
@@ -3892,10 +3894,10 @@ tsize_t t2p_write_pdf_stream_dict_end(TIFF* output){
 tsize_t t2p_write_pdf_stream_length(tsize_t len, TIFF* output){
 
 	tsize_t written=0;
-	char buffer[16];
+	char buffer[32];
 	int buflen=0;
 
-	buflen=sprintf(buffer, "%lu", (unsigned long)len);
+	buflen=snprintf(buffer, sizeof(buffer), "%lu", (unsigned long)len);
 	written += t2pWriteFile(output, (tdata_t) buffer, buflen);
 	written += t2pWriteFile(output, (tdata_t) "\n", 1);
 
@@ -3909,7 +3911,7 @@ tsize_t t2p_write_pdf_stream_length(tsize_t len, TIFF* output){
 tsize_t t2p_write_pdf_catalog(T2P* t2p, TIFF* output)
 {
 	tsize_t written = 0;
-	char buffer[16];
+	char buffer[32];
 	int buflen = 0;
 
 	written += t2pWriteFile(output, 
@@ -3948,7 +3950,6 @@ tsize_t t2p_write_pdf_info(T2P* t2p, TIFF* input, TIFF* output)
 		written += t2p_write_pdf_string(t2p->pdf_datetime, output);
 	}
 	written += t2pWriteFile(output, (tdata_t) "\n/Producer ", 11);
-	_TIFFmemset((tdata_t)buffer, 0x00, sizeof(buffer));
 	snprintf(buffer, sizeof(buffer), "libtiff / tiff2pdf - %d", TIFFLIB_VERSION);
 	written += t2p_write_pdf_string(buffer, output);
 	written += t2pWriteFile(output, (tdata_t) "\n", 1);
@@ -4089,7 +4090,7 @@ tsize_t t2p_write_pdf_pages(T2P* t2p, TIFF* output)
 {
 	tsize_t written=0;
 	tdir_t i=0;
-	char buffer[16];
+	char buffer[32];
 	int buflen=0;
 
 	int page=0;
@@ -4097,7 +4098,7 @@ tsize_t t2p_write_pdf_pages(T2P* t2p, TIFF* output)
 		(tdata_t) "<< \n/Type /Pages \n/Kids [ ", 26);
 	page = t2p->pdf_pages+1;
 	for (i=0;i<t2p->tiff_pagecount;i++){
-		buflen=sprintf(buffer, "%d", page);
+		buflen=snprintf(buffer, sizeof(buffer), "%d", page);
 		written += t2pWriteFile(output, (tdata_t) buffer, buflen);
 		written += t2pWriteFile(output, (tdata_t) " 0 R ", 5);
 		if ( ((i+1)%8)==0 ) {
@@ -4112,8 +4113,7 @@ tsize_t t2p_write_pdf_pages(T2P* t2p, TIFF* output)
 		}
 	}
 	written += t2pWriteFile(output, (tdata_t) "] \n/Count ", 10);
-	_TIFFmemset(buffer, 0x00, 16);
-	buflen=sprintf(buffer, "%d", t2p->tiff_pagecount);
+	buflen=snprintf(buffer, sizeof(buffer), "%d", t2p->tiff_pagecount);
 	written += t2pWriteFile(output, (tdata_t) buffer, buflen);
 	written += t2pWriteFile(output, (tdata_t) " \n>> \n", 6);
 
@@ -4128,28 +4128,28 @@ tsize_t t2p_write_pdf_page(uint32 object, T2P* t2p, TIFF* output){
 
 	unsigned int i=0;
 	tsize_t written=0;
-	char buffer[16];
+	char buffer[256];
 	int buflen=0;
 
 	written += t2pWriteFile(output, (tdata_t) "<<\n/Type /Page \n/Parent ", 24);
-	buflen=sprintf(buffer, "%lu", (unsigned long)t2p->pdf_pages);
+	buflen=snprintf(buffer, sizeof(buffer), "%lu", (unsigned long)t2p->pdf_pages);
 	written += t2pWriteFile(output, (tdata_t) buffer, buflen);
 	written += t2pWriteFile(output, (tdata_t) " 0 R \n", 6);
 	written += t2pWriteFile(output, (tdata_t) "/MediaBox [", 11); 
-	buflen=sprintf(buffer, "%.4f",t2p->pdf_mediabox.x1);
+	buflen=snprintf(buffer, sizeof(buffer), "%.4f",t2p->pdf_mediabox.x1);
 	written += t2pWriteFile(output, (tdata_t) buffer, buflen);
 	written += t2pWriteFile(output, (tdata_t) " ", 1); 
-	buflen=sprintf(buffer, "%.4f",t2p->pdf_mediabox.y1);
+	buflen=snprintf(buffer, sizeof(buffer), "%.4f",t2p->pdf_mediabox.y1);
 	written += t2pWriteFile(output, (tdata_t) buffer, buflen);
 	written += t2pWriteFile(output, (tdata_t) " ", 1); 
-	buflen=sprintf(buffer, "%.4f",t2p->pdf_mediabox.x2);
+	buflen=snprintf(buffer, sizeof(buffer), "%.4f",t2p->pdf_mediabox.x2);
 	written += t2pWriteFile(output, (tdata_t) buffer, buflen);
 	written += t2pWriteFile(output, (tdata_t) " ", 1); 
-	buflen=sprintf(buffer, "%.4f",t2p->pdf_mediabox.y2);
+	buflen=snprintf(buffer, sizeof(buffer), "%.4f",t2p->pdf_mediabox.y2);
 	written += t2pWriteFile(output, (tdata_t) buffer, buflen);
 	written += t2pWriteFile(output, (tdata_t) "] \n", 3); 
 	written += t2pWriteFile(output, (tdata_t) "/Contents ", 10);
-	buflen=sprintf(buffer, "%lu", (unsigned long)(object + 1));
+	buflen=snprintf(buffer, sizeof(buffer), "%lu", (unsigned long)(object + 1));
 	written += t2pWriteFile(output, (tdata_t) buffer, buflen);
 	written += t2pWriteFile(output, (tdata_t) " 0 R \n", 6);
 	written += t2pWriteFile(output, (tdata_t) "/Resources << \n", 15);
@@ -4157,15 +4157,13 @@ tsize_t t2p_write_pdf_page(uint32 object, T2P* t2p, TIFF* output){
 		written += t2pWriteFile(output, (tdata_t) "/XObject <<\n", 12);
 		for(i=0;i<t2p->tiff_tiles[t2p->pdf_page].tiles_tilecount;i++){
 			written += t2pWriteFile(output, (tdata_t) "/Im", 3);
-			buflen = sprintf(buffer, "%u", t2p->pdf_page+1);
+			buflen = snprintf(buffer, sizeof(buffer), "%u", t2p->pdf_page+1);
 			written += t2pWriteFile(output, (tdata_t) buffer, buflen);
 			written += t2pWriteFile(output, (tdata_t) "_", 1);
-			buflen = sprintf(buffer, "%u", i+1);
+			buflen = snprintf(buffer, sizeof(buffer), "%u", i+1);
 			written += t2pWriteFile(output, (tdata_t) buffer, buflen);
 			written += t2pWriteFile(output, (tdata_t) " ", 1);
-			buflen = sprintf(
-				buffer, 
-				"%lu", 
+			buflen = snprintf(buffer, sizeof(buffer), "%lu",
 				(unsigned long)(object+3+(2*i)+t2p->tiff_pages[t2p->pdf_page].page_extra)); 
 			written += t2pWriteFile(output, (tdata_t) buffer, buflen);
 			written += t2pWriteFile(output, (tdata_t) " 0 R ", 5);
@@ -4177,12 +4175,10 @@ tsize_t t2p_write_pdf_page(uint32 object, T2P* t2p, TIFF* output){
 	} else {
 			written += t2pWriteFile(output, (tdata_t) "/XObject <<\n", 12);
 			written += t2pWriteFile(output, (tdata_t) "/Im", 3);
-			buflen = sprintf(buffer, "%u", t2p->pdf_page+1);
+			buflen = snprintf(buffer, sizeof(buffer), "%u", t2p->pdf_page+1);
 			written += t2pWriteFile(output, (tdata_t) buffer, buflen);
 			written += t2pWriteFile(output, (tdata_t) " ", 1);
-			buflen = sprintf(
-				buffer, 
-				"%lu", 
+			buflen = snprintf(buffer, sizeof(buffer), "%lu",
 				(unsigned long)(object+3+(2*i)+t2p->tiff_pages[t2p->pdf_page].page_extra)); 
 			written += t2pWriteFile(output, (tdata_t) buffer, buflen);
 			written += t2pWriteFile(output, (tdata_t) " 0 R ", 5);
@@ -4191,9 +4187,7 @@ tsize_t t2p_write_pdf_page(uint32 object, T2P* t2p, TIFF* output){
 	if(t2p->tiff_transferfunctioncount != 0) {
 		written += t2pWriteFile(output, (tdata_t) "/ExtGState <<", 13);
 		t2pWriteFile(output, (tdata_t) "/GS1 ", 5);
-		buflen = sprintf(
-			buffer, 
-			"%lu", 
+		buflen = snprintf(buffer, sizeof(buffer), "%lu",
 			(unsigned long)(object + 3)); 
 		written += t2pWriteFile(output, (tdata_t) buffer, buflen);
 		written += t2pWriteFile(output, (tdata_t) " 0 R ", 5);
@@ -4566,7 +4560,7 @@ tsize_t t2p_write_pdf_page_content_stream(T2P* t2p, TIFF* output){
 	if(t2p->tiff_tiles[t2p->pdf_page].tiles_tilecount>0){ 
 		for(i=0;i<t2p->tiff_tiles[t2p->pdf_page].tiles_tilecount; i++){
 			box=t2p->tiff_tiles[t2p->pdf_page].tiles_tiles[i].tile_box;
-			buflen=sprintf(buffer, 
+			buflen=snprintf(buffer, sizeof(buffer), 
 				"q %s %.4f %.4f %.4f %.4f %.4f %.4f cm /Im%d_%ld Do Q\n", 
 				t2p->tiff_transferfunctioncount?"/GS1 gs ":"",
 				box.mat[0],
@@ -4581,7 +4575,7 @@ tsize_t t2p_write_pdf_page_content_stream(T2P* t2p, TIFF* output){
 		}
 	} else {
 		box=t2p->pdf_imagebox;
-		buflen=sprintf(buffer, 
+		buflen=snprintf(buffer, sizeof(buffer), 
 			"q %s %.4f %.4f %.4f %.4f %.4f %.4f cm /Im%d Do Q\n", 
 			t2p->tiff_transferfunctioncount?"/GS1 gs ":"",
 			box.mat[0],
@@ -4606,59 +4600,48 @@ tsize_t t2p_write_pdf_xobject_stream_dict(ttile_t tile,
 												TIFF* output){
 
 	tsize_t written=0;
-	char buffer[16];
+	char buffer[32];
 	int buflen=0;
 
 	written += t2p_write_pdf_stream_dict(0, t2p->pdf_xrefcount+1, output); 
 	written += t2pWriteFile(output, 
 		(tdata_t) "/Type /XObject \n/Subtype /Image \n/Name /Im", 
 		42);
-	buflen=sprintf(buffer, "%u", t2p->pdf_page+1);
+	buflen=snprintf(buffer, sizeof(buffer), "%u", t2p->pdf_page+1);
 	written += t2pWriteFile(output, (tdata_t) buffer, buflen);
 	if(tile != 0){
 		written += t2pWriteFile(output, (tdata_t) "_", 1);
-		buflen=sprintf(buffer, "%lu", (unsigned long)tile);
+		buflen=snprintf(buffer, sizeof(buffer), "%lu", (unsigned long)tile);
 		written += t2pWriteFile(output, (tdata_t) buffer, buflen);
 	}
 	written += t2pWriteFile(output, (tdata_t) "\n/Width ", 8);
-	_TIFFmemset((tdata_t)buffer, 0x00, 16);
 	if(tile==0){
-		buflen=sprintf(buffer, "%lu", (unsigned long)t2p->tiff_width);
+		buflen=snprintf(buffer, sizeof(buffer), "%lu", (unsigned long)t2p->tiff_width);
 	} else {
 		if(t2p_tile_is_right_edge(t2p->tiff_tiles[t2p->pdf_page], tile-1)!=0){
-			buflen=sprintf(
-				buffer, 
-				"%lu", 
+			buflen=snprintf(buffer, sizeof(buffer), "%lu",
 				(unsigned long)t2p->tiff_tiles[t2p->pdf_page].tiles_edgetilewidth);
 		} else {
-			buflen=sprintf(
-				buffer, 
-				"%lu", 
+			buflen=snprintf(buffer, sizeof(buffer), "%lu",
 				(unsigned long)t2p->tiff_tiles[t2p->pdf_page].tiles_tilewidth);
 		}
 	}
 	written += t2pWriteFile(output, (tdata_t) buffer, buflen);
 	written += t2pWriteFile(output, (tdata_t) "\n/Height ", 9);
-	_TIFFmemset((tdata_t)buffer, 0x00, 16);
 	if(tile==0){
-		buflen=sprintf(buffer, "%lu", (unsigned long)t2p->tiff_length);
+		buflen=snprintf(buffer, sizeof(buffer), "%lu", (unsigned long)t2p->tiff_length);
 	} else {
 		if(t2p_tile_is_bottom_edge(t2p->tiff_tiles[t2p->pdf_page], tile-1)!=0){
-			buflen=sprintf(
-				buffer, 
-				"%lu", 
+			buflen=snprintf(buffer, sizeof(buffer), "%lu",
 				(unsigned long)t2p->tiff_tiles[t2p->pdf_page].tiles_edgetilelength);
 		} else {
-			buflen=sprintf(
-				buffer, 
-				"%lu", 
+			buflen=snprintf(buffer, sizeof(buffer), "%lu",
 				(unsigned long)t2p->tiff_tiles[t2p->pdf_page].tiles_tilelength);
 		}
 	}
 	written += t2pWriteFile(output, (tdata_t) buffer, buflen);
 	written += t2pWriteFile(output, (tdata_t) "\n/BitsPerComponent ", 19);
-	_TIFFmemset((tdata_t)buffer, 0x00, 16);
-	buflen=sprintf(buffer, "%u", t2p->tiff_bitspersample);
+	buflen=snprintf(buffer, sizeof(buffer), "%u", t2p->tiff_bitspersample);
 	written += t2pWriteFile(output, (tdata_t) buffer, buflen);
 	written += t2pWriteFile(output, (tdata_t) "\n/ColorSpace ", 13);
 	written += t2p_write_pdf_xobject_cs(t2p, output);
@@ -4702,11 +4685,10 @@ tsize_t t2p_write_pdf_xobject_cs(T2P* t2p, TIFF* output){
 		t2p->pdf_colorspace ^= T2P_CS_PALETTE;
 		written += t2p_write_pdf_xobject_cs(t2p, output);
 		t2p->pdf_colorspace |= T2P_CS_PALETTE;
-		buflen=sprintf(buffer, "%u", (0x0001 << t2p->tiff_bitspersample)-1 );
+		buflen=snprintf(buffer, sizeof(buffer), "%u", (0x0001 << t2p->tiff_bitspersample)-1 );
 		written += t2pWriteFile(output, (tdata_t) buffer, buflen);
 		written += t2pWriteFile(output, (tdata_t) " ", 1);
-		_TIFFmemset(buffer, 0x00, 16);
-		buflen=sprintf(buffer, "%lu", (unsigned long)t2p->pdf_palettecs ); 
+		buflen=snprintf(buffer, sizeof(buffer), "%lu", (unsigned long)t2p->pdf_palettecs ); 
 		written += t2pWriteFile(output, (tdata_t) buffer, buflen);
 		written += t2pWriteFile(output, (tdata_t) " 0 R ]\n", 7);
 		return(written);
@@ -4740,10 +4722,10 @@ tsize_t t2p_write_pdf_xobject_cs(T2P* t2p, TIFF* output){
 			X_W /= Y_W;
 			Z_W /= Y_W;
 			Y_W = 1.0F;
-			buflen=sprintf(buffer, "[%.4f %.4f %.4f] \n", X_W, Y_W, Z_W);
+			buflen=snprintf(buffer, sizeof(buffer), "[%.4f %.4f %.4f] \n", X_W, Y_W, Z_W);
 			written += t2pWriteFile(output, (tdata_t) buffer, buflen);
 			written += t2pWriteFile(output, (tdata_t) "/Range ", 7);
-			buflen=sprintf(buffer, "[%d %d %d %d] \n", 
+			buflen=snprintf(buffer, sizeof(buffer), "[%d %d %d %d] \n", 
 				t2p->pdf_labrange[0], 
 				t2p->pdf_labrange[1], 
 				t2p->pdf_labrange[2], 
@@ -4759,26 +4741,26 @@ tsize_t t2p_write_pdf_xobject_cs(T2P* t2p, TIFF* output){
 tsize_t t2p_write_pdf_transfer(T2P* t2p, TIFF* output){
 
 	tsize_t written=0;
-	char buffer[16];
+	char buffer[32];
 	int buflen=0;
 
 	written += t2pWriteFile(output, (tdata_t) "<< /Type /ExtGState \n/TR ", 25);
 	if(t2p->tiff_transferfunctioncount == 1){
-		buflen=sprintf(buffer, "%lu",
+		buflen=snprintf(buffer, sizeof(buffer), "%lu",
 			       (unsigned long)(t2p->pdf_xrefcount + 1));
 		written += t2pWriteFile(output, (tdata_t) buffer, buflen);
 		written += t2pWriteFile(output, (tdata_t) " 0 R ", 5);
 	} else {
 		written += t2pWriteFile(output, (tdata_t) "[ ", 2);
-		buflen=sprintf(buffer, "%lu",
+		buflen=snprintf(buffer, sizeof(buffer), "%lu",
 			       (unsigned long)(t2p->pdf_xrefcount + 1));
 		written += t2pWriteFile(output, (tdata_t) buffer, buflen);
 		written += t2pWriteFile(output, (tdata_t) " 0 R ", 5);
-		buflen=sprintf(buffer, "%lu",
+		buflen=snprintf(buffer, sizeof(buffer), "%lu",
 			       (unsigned long)(t2p->pdf_xrefcount + 2));
 		written += t2pWriteFile(output, (tdata_t) buffer, buflen);
 		written += t2pWriteFile(output, (tdata_t) " 0 R ", 5);
-		buflen=sprintf(buffer, "%lu",
+		buflen=snprintf(buffer, sizeof(buffer), "%lu",
 			       (unsigned long)(t2p->pdf_xrefcount + 3));
 		written += t2pWriteFile(output, (tdata_t) buffer, buflen);
 		written += t2pWriteFile(output, (tdata_t) " 0 R ", 5);
@@ -4800,7 +4782,7 @@ tsize_t t2p_write_pdf_transfer_dict(T2P* t2p, TIFF* output, uint16 i){
 	written += t2pWriteFile(output, (tdata_t) "/FunctionType 0 \n", 17);
 	written += t2pWriteFile(output, (tdata_t) "/Domain [0.0 1.0] \n", 19);
 	written += t2pWriteFile(output, (tdata_t) "/Range [0.0 1.0] \n", 18);
-	buflen=sprintf(buffer, "/Size [%u] \n", (1<<t2p->tiff_bitspersample));
+	buflen=snprintf(buffer, sizeof(buffer), "/Size [%u] \n", (1<<t2p->tiff_bitspersample));
 	written += t2pWriteFile(output, (tdata_t) buffer, buflen);
 	written += t2pWriteFile(output, (tdata_t) "/BitsPerSample 16 \n", 19);
 	written += t2p_write_pdf_stream_dict(((tsize_t)1)<<(t2p->tiff_bitspersample+1), 0, output);
@@ -4827,7 +4809,7 @@ tsize_t t2p_write_pdf_transfer_stream(T2P* t2p, TIFF* output, uint16 i){
 tsize_t t2p_write_pdf_xobject_calcs(T2P* t2p, TIFF* output){
 
 	tsize_t written=0;
-	char buffer[128];
+	char buffer[256];
 	int buflen=0;
 	
 	float X_W=0.0;
@@ -4895,16 +4877,16 @@ tsize_t t2p_write_pdf_xobject_calcs(T2P* t2p, TIFF* output){
 	written += t2pWriteFile(output, (tdata_t) "<< \n", 4);
 	if(t2p->pdf_colorspace & T2P_CS_CALGRAY){
 		written += t2pWriteFile(output, (tdata_t) "/WhitePoint ", 12);
-		buflen=sprintf(buffer, "[%.4f %.4f %.4f] \n", X_W, Y_W, Z_W);
+		buflen=snprintf(buffer, sizeof(buffer), "[%.4f %.4f %.4f] \n", X_W, Y_W, Z_W);
 		written += t2pWriteFile(output, (tdata_t) buffer, buflen);
 		written += t2pWriteFile(output, (tdata_t) "/Gamma 2.2 \n", 12);
 	}
 	if(t2p->pdf_colorspace & T2P_CS_CALRGB){
 		written += t2pWriteFile(output, (tdata_t) "/WhitePoint ", 12);
-		buflen=sprintf(buffer, "[%.4f %.4f %.4f] \n", X_W, Y_W, Z_W);
+		buflen=snprintf(buffer, sizeof(buffer), "[%.4f %.4f %.4f] \n", X_W, Y_W, Z_W);
 		written += t2pWriteFile(output, (tdata_t) buffer, buflen);
 		written += t2pWriteFile(output, (tdata_t) "/Matrix ", 8);
-		buflen=sprintf(buffer, "[%.4f %.4f %.4f %.4f %.4f %.4f %.4f %.4f %.4f] \n", 
+		buflen=snprintf(buffer, sizeof(buffer), "[%.4f %.4f %.4f %.4f %.4f %.4f %.4f %.4f %.4f] \n", 
 			X_R, Y_R, Z_R, 
 			X_G, Y_G, Z_G, 
 			X_B, Y_B, Z_B); 
@@ -4923,11 +4905,11 @@ tsize_t t2p_write_pdf_xobject_calcs(T2P* t2p, TIFF* output){
 tsize_t t2p_write_pdf_xobject_icccs(T2P* t2p, TIFF* output){
 
 	tsize_t written=0;
-	char buffer[16];
+	char buffer[32];
 	int buflen=0;
 	
 	written += t2pWriteFile(output, (tdata_t) "[/ICCBased ", 11);
-	buflen=sprintf(buffer, "%lu", (unsigned long)t2p->pdf_icccs);
+	buflen=snprintf(buffer, sizeof(buffer), "%lu", (unsigned long)t2p->pdf_icccs);
 	written += t2pWriteFile(output, (tdata_t) buffer, buflen);
 	written += t2pWriteFile(output, (tdata_t) " 0 R] \n", 7);
 
@@ -4937,11 +4919,11 @@ tsize_t t2p_write_pdf_xobject_icccs(T2P* t2p, TIFF* output){
 tsize_t t2p_write_pdf_xobject_icccs_dict(T2P* t2p, TIFF* output){
 
 	tsize_t written=0;
-	char buffer[16];
+	char buffer[32];
 	int buflen=0;
 	
 	written += t2pWriteFile(output, (tdata_t) "/N ", 3);
-	buflen=sprintf(buffer, "%u \n", t2p->tiff_samplesperpixel);
+	buflen=snprintf(buffer, sizeof(buffer), "%u \n", t2p->tiff_samplesperpixel);
 	written += t2pWriteFile(output, (tdata_t) buffer, buflen);
 	written += t2pWriteFile(output, (tdata_t) "/Alternate ", 11);
 	t2p->pdf_colorspace ^= T2P_CS_ICCBASED;
@@ -5006,7 +4988,7 @@ tsize_t t2p_write_pdf_xobject_decode(T2P* t2p, TIFF* output){
 tsize_t t2p_write_pdf_xobject_stream_filter(ttile_t tile, T2P* t2p, TIFF* output){
 
 	tsize_t written=0;
-	char buffer[16];
+	char buffer[32];
 	int buflen=0;
 
 	if(t2p->pdf_compression==T2P_COMPRESS_NONE){
@@ -5021,41 +5003,33 @@ tsize_t t2p_write_pdf_xobject_stream_filter(ttile_t tile, T2P* t2p, TIFF* output
 			written += t2pWriteFile(output, (tdata_t) "<< /K -1 ", 9);
 			if(tile==0){
 				written += t2pWriteFile(output, (tdata_t) "/Columns ", 9);
-				buflen=sprintf(buffer, "%lu",
+				buflen=snprintf(buffer, sizeof(buffer), "%lu",
 					       (unsigned long)t2p->tiff_width);
 				written += t2pWriteFile(output, (tdata_t) buffer, buflen);
 				written += t2pWriteFile(output, (tdata_t) " /Rows ", 7);
-				buflen=sprintf(buffer, "%lu",
+				buflen=snprintf(buffer, sizeof(buffer), "%lu",
 					       (unsigned long)t2p->tiff_length);
 				written += t2pWriteFile(output, (tdata_t) buffer, buflen);
 			} else {
 				if(t2p_tile_is_right_edge(t2p->tiff_tiles[t2p->pdf_page], tile-1)==0){
 					written += t2pWriteFile(output, (tdata_t) "/Columns ", 9);
-					buflen=sprintf(
-						buffer, 
-						"%lu", 
+					buflen=snprintf(buffer, sizeof(buffer), "%lu",
 						(unsigned long)t2p->tiff_tiles[t2p->pdf_page].tiles_tilewidth);
 					written += t2pWriteFile(output, (tdata_t) buffer, buflen);
 				} else {
 					written += t2pWriteFile(output, (tdata_t) "/Columns ", 9);
-					buflen=sprintf(
-						buffer, 
-						"%lu", 
+					buflen=snprintf(buffer, sizeof(buffer), "%lu",
 						(unsigned long)t2p->tiff_tiles[t2p->pdf_page].tiles_edgetilewidth);
 					written += t2pWriteFile(output, (tdata_t) buffer, buflen);
 				}
 				if(t2p_tile_is_bottom_edge(t2p->tiff_tiles[t2p->pdf_page], tile-1)==0){
 					written += t2pWriteFile(output, (tdata_t) " /Rows ", 7);
-					buflen=sprintf(
-						buffer, 
-						"%lu", 
+					buflen=snprintf(buffer, sizeof(buffer), "%lu",
 						(unsigned long)t2p->tiff_tiles[t2p->pdf_page].tiles_tilelength);
 					written += t2pWriteFile(output, (tdata_t) buffer, buflen);
 				} else {
 					written += t2pWriteFile(output, (tdata_t) " /Rows ", 7);
-					buflen=sprintf(
-						buffer, 
-						"%lu", 
+					buflen=snprintf(buffer, sizeof(buffer), "%lu",
 						(unsigned long)t2p->tiff_tiles[t2p->pdf_page].tiles_edgetilelength);
 					written += t2pWriteFile(output, (tdata_t) buffer, buflen);
 				}
@@ -5082,21 +5056,17 @@ tsize_t t2p_write_pdf_xobject_stream_filter(ttile_t tile, T2P* t2p, TIFF* output
 			if(t2p->pdf_compressionquality%100){
 				written += t2pWriteFile(output, (tdata_t) "/DecodeParms ", 13);
 				written += t2pWriteFile(output, (tdata_t) "<< /Predictor ", 14);
-				_TIFFmemset(buffer, 0x00, 16);
-				buflen=sprintf(buffer, "%u", t2p->pdf_compressionquality%100);
+				buflen=snprintf(buffer, sizeof(buffer), "%u", t2p->pdf_compressionquality%100);
 				written += t2pWriteFile(output, (tdata_t) buffer, buflen);
 				written += t2pWriteFile(output, (tdata_t) " /Columns ", 10);
-				_TIFFmemset(buffer, 0x00, 16);
-				buflen = sprintf(buffer, "%lu",
+				buflen = snprintf(buffer, sizeof(buffer), "%lu",
 						 (unsigned long)t2p->tiff_width);
 				written += t2pWriteFile(output, (tdata_t) buffer, buflen);
 				written += t2pWriteFile(output, (tdata_t) " /Colors ", 9);
-				_TIFFmemset(buffer, 0x00, 16);
-				buflen=sprintf(buffer, "%u", t2p->tiff_samplesperpixel);
+				buflen=snprintf(buffer, sizeof(buffer), "%u", t2p->tiff_samplesperpixel);
 				written += t2pWriteFile(output, (tdata_t) buffer, buflen);
 				written += t2pWriteFile(output, (tdata_t) " /BitsPerComponent ", 19);
-				_TIFFmemset(buffer, 0x00, 16);
-				buflen=sprintf(buffer, "%u", t2p->tiff_bitspersample);
+				buflen=snprintf(buffer, sizeof(buffer), "%u", t2p->tiff_bitspersample);
 				written += t2pWriteFile(output, (tdata_t) buffer, buflen);
 				written += t2pWriteFile(output, (tdata_t) ">>\n", 3);
 			}
@@ -5116,16 +5086,16 @@ tsize_t t2p_write_pdf_xobject_stream_filter(ttile_t tile, T2P* t2p, TIFF* output
 tsize_t t2p_write_pdf_xreftable(T2P* t2p, TIFF* output){
 
 	tsize_t written=0;
-	char buffer[21];
+	char buffer[64];
 	int buflen=0;
 	uint32 i=0;
 
 	written += t2pWriteFile(output, (tdata_t) "xref\n0 ", 7);
-	buflen=sprintf(buffer, "%lu", (unsigned long)(t2p->pdf_xrefcount + 1));
+	buflen=snprintf(buffer, sizeof(buffer), "%lu", (unsigned long)(t2p->pdf_xrefcount + 1));
 	written += t2pWriteFile(output, (tdata_t) buffer, buflen);
 	written += t2pWriteFile(output, (tdata_t) " \n0000000000 65535 f \n", 22);
 	for (i=0;i<t2p->pdf_xrefcount;i++){
-		sprintf(buffer, "%.10lu 00000 n \n",
+		snprintf(buffer, sizeof(buffer), "%.10lu 00000 n \n",
 			(unsigned long)t2p->pdf_xrefoffsets[i]);
 		written += t2pWriteFile(output, (tdata_t) buffer, 20);
 	}
@@ -5149,17 +5119,14 @@ tsize_t t2p_write_pdf_trailer(T2P* t2p, TIFF* output)
 		snprintf(t2p->pdf_fileid + i, 9, "%.8X", rand());
 
 	written += t2pWriteFile(output, (tdata_t) "trailer\n<<\n/Size ", 17);
-	buflen = sprintf(buffer, "%lu", (unsigned long)(t2p->pdf_xrefcount+1));
+	buflen = snprintf(buffer, sizeof(buffer), "%lu", (unsigned long)(t2p->pdf_xrefcount+1));
 	written += t2pWriteFile(output, (tdata_t) buffer, buflen);
-	_TIFFmemset(buffer, 0x00, 32);	
 	written += t2pWriteFile(output, (tdata_t) "\n/Root ", 7);
-	buflen=sprintf(buffer, "%lu", (unsigned long)t2p->pdf_catalog);
+	buflen=snprintf(buffer, sizeof(buffer), "%lu", (unsigned long)t2p->pdf_catalog);
 	written += t2pWriteFile(output, (tdata_t) buffer, buflen);
-	_TIFFmemset(buffer, 0x00, 32);	
 	written += t2pWriteFile(output, (tdata_t) " 0 R \n/Info ", 12);
-	buflen=sprintf(buffer, "%lu", (unsigned long)t2p->pdf_info);
+	buflen=snprintf(buffer, sizeof(buffer), "%lu", (unsigned long)t2p->pdf_info);
 	written += t2pWriteFile(output, (tdata_t) buffer, buflen);
-	_TIFFmemset(buffer, 0x00, 32);	
 	written += t2pWriteFile(output, (tdata_t) " 0 R \n/ID[<", 11);
 	written += t2pWriteFile(output, (tdata_t) t2p->pdf_fileid,
 				sizeof(t2p->pdf_fileid) - 1);
@@ -5167,9 +5134,8 @@ tsize_t t2p_write_pdf_trailer(T2P* t2p, TIFF* output)
 	written += t2pWriteFile(output, (tdata_t) t2p->pdf_fileid,
 				sizeof(t2p->pdf_fileid) - 1);
 	written += t2pWriteFile(output, (tdata_t) ">]\n>>\nstartxref\n", 16);
-	buflen=sprintf(buffer, "%lu", (unsigned long)t2p->pdf_startxref);
+	buflen=snprintf(buffer, sizeof(buffer), "%lu", (unsigned long)t2p->pdf_startxref);
 	written += t2pWriteFile(output, (tdata_t) buffer, buflen);
-	_TIFFmemset(buffer, 0x00, 32);	
 	written += t2pWriteFile(output, (tdata_t) "\n%%EOF\n", 7);
 
 	return(written);
diff --git a/tools/tiff2ps.c b/tools/tiff2ps.c
index 3330750..7a9a816 100644
--- a/tools/tiff2ps.c
+++ b/tools/tiff2ps.c
@@ -1789,8 +1789,8 @@ PS_Lvl2ImageDict(FILE* fd, TIFF* tif, uint32 w, uint32 h)
 		imageOp = "imagemask";
 
 	(void)strcpy(im_x, "0");
-	(void)sprintf(im_y, "%lu", (long) h);
-	(void)sprintf(im_h, "%lu", (long) h);
+	(void)snprintf(im_y, sizeof(im_y), "%lu", (long) h);
+	(void)snprintf(im_h, sizeof(im_h), "%lu", (long) h);
 	tile_width = w;
 	tile_height = h;
 	if (TIFFIsTiled(tif)) {
@@ -1811,7 +1811,7 @@ PS_Lvl2ImageDict(FILE* fd, TIFF* tif, uint32 w, uint32 h)
 		}
 		if (tile_height < h) {
 			fputs("/im_y 0 def\n", fd);
-			(void)sprintf(im_y, "%lu im_y sub", (unsigned long) h);
+			(void)snprintf(im_y, sizeof(im_y), "%lu im_y sub", (unsigned long) h);
 		}
 	} else {
 		repeat_count = tf_numberstrips;
@@ -1823,7 +1823,7 @@ PS_Lvl2ImageDict(FILE* fd, TIFF* tif, uint32 w, uint32 h)
 			fprintf(fd, "/im_h %lu def\n",
 			    (unsigned long) tile_height);
 			(void)strcpy(im_h, "im_h");
-			(void)sprintf(im_y, "%lu im_y sub", (unsigned long) h);
+			(void)snprintf(im_y, sizeof(im_y), "%lu im_y sub", (unsigned long) h);
 		}
 	}
 
diff --git a/tools/tiffcrop.c b/tools/tiffcrop.c
index 9cd5d86..a2443aa 100644
--- a/tools/tiffcrop.c
+++ b/tools/tiffcrop.c
@@ -2077,7 +2077,7 @@ update_output_file (TIFF **tiffout, char *mode, int autoindex,
         return 1;
         }
 
-      sprintf (filenum, "-%03d%s", findex, export_ext);
+      snprintf(filenum, sizeof(filenum), "-%03d%s", findex, export_ext);
       filenum[14] = '\0';
       strncat (exportname, filenum, 15);
       }
@@ -2230,8 +2230,8 @@ main(int argc, char* argv[])
 
           /* dump.infilename is guaranteed to be NUL termimated and have 20 bytes 
              fewer than PATH_MAX */ 
-          memset (temp_filename, '\0', PATH_MAX + 1);              
-          sprintf (temp_filename, "%s-read-%03d.%s", dump.infilename, dump_images,
+          snprintf(temp_filename, sizeof(temp_filename), "%s-read-%03d.%s",
+		   dump.infilename, dump_images,
                   (dump.format == DUMP_TEXT) ? "txt" : "raw");
           if ((dump.infile = fopen(temp_filename, dump.mode)) == NULL)
             {
@@ -2249,8 +2249,8 @@ main(int argc, char* argv[])
 
           /* dump.outfilename is guaranteed to be NUL termimated and have 20 bytes 
              fewer than PATH_MAX */ 
-          memset (temp_filename, '\0', PATH_MAX + 1);              
-          sprintf (temp_filename, "%s-write-%03d.%s", dump.outfilename, dump_images,
+          snprintf(temp_filename, sizeof(temp_filename), "%s-write-%03d.%s",
+		   dump.outfilename, dump_images,
                   (dump.format == DUMP_TEXT) ? "txt" : "raw");
           if ((dump.outfile = fopen(temp_filename, dump.mode)) == NULL)
             {
diff --git a/tools/tiffdither.c b/tools/tiffdither.c
index f2f0f20..4308946 100644
--- a/tools/tiffdither.c
+++ b/tools/tiffdither.c
@@ -260,7 +260,7 @@ main(int argc, char* argv[])
 		TIFFSetField(out, TIFFTAG_FILLORDER, fillorder);
 	else
 		CopyField(TIFFTAG_FILLORDER, shortv);
-	sprintf(thing, "Dithered B&W version of %s", argv[optind]);
+	snprintf(thing, sizeof(thing), "Dithered B&W version of %s", argv[optind]);
 	TIFFSetField(out, TIFFTAG_IMAGEDESCRIPTION, thing);
 	CopyField(TIFFTAG_PHOTOMETRIC, shortv);
 	CopyField(TIFFTAG_ORIENTATION, shortv);
-- 
1.8.3.rc3


