From 97c8616b970a8da16b39e29d231a4e999c91c695 Mon Sep 17 00:00:00 2001 From: Robin Watts Date: Wed, 24 Jul 2013 15:15:43 +0100 Subject: Bug 694429: Fix potential overflows in sprintf in pdfextract Thanks to Pengsu Cheng for pointing out the problem. --- source/tools/pdfextract.c | 28 ++++++++++++++-------------- 1 file changed, 14 insertions(+), 14 deletions(-) (limited to 'source') diff --git a/source/tools/pdfextract.c b/source/tools/pdfextract.c index 30a0de3f..f3a11231 100644 --- a/source/tools/pdfextract.c +++ b/source/tools/pdfextract.c @@ -30,7 +30,7 @@ static int isfontdesc(pdf_obj *obj) static void writepixmap(fz_context *ctx, fz_pixmap *pix, char *file, int rgb) { - char name[1024]; + char buf[1024]; fz_pixmap *converted = NULL; if (!pix) @@ -46,15 +46,15 @@ static void writepixmap(fz_context *ctx, fz_pixmap *pix, char *file, int rgb) if (pix->n <= 4) { - sprintf(name, "%s.png", file); - printf("extracting image %s\n", name); - fz_write_png(ctx, pix, name, 0); + snprintf(buf, sizeof(buf), "%s.png", file); + printf("extracting image %s\n", buf); + fz_write_png(ctx, pix, buf, 0); } else { - sprintf(name, "%s.pam", file); - printf("extracting image %s\n", name); - fz_write_pam(ctx, pix, name, 0); + snprintf(buf, sizeof(buf), "%s.pam", file); + printf("extracting image %s\n", buf); + fz_write_pam(ctx, pix, buf, 0); } fz_drop_pixmap(ctx, converted); @@ -65,7 +65,7 @@ static void saveimage(int num) fz_image *image; fz_pixmap *pix; pdf_obj *ref; - char name[32]; + char buf[32]; ref = pdf_new_indirect(doc, num, 0); @@ -75,8 +75,8 @@ static void saveimage(int num) pix = fz_new_pixmap_from_image(ctx, image, 0, 0); fz_drop_image(ctx, image); - sprintf(name, "img-%04d", num); - writepixmap(ctx, pix, name, dorgb); + snprintf(buf, sizeof(buf), "img-%04d", num); + writepixmap(ctx, pix, buf, dorgb); fz_drop_pixmap(ctx, pix); pdf_drop_obj(ref); @@ -84,7 +84,7 @@ static void saveimage(int num) static void savefont(pdf_obj *dict, int num) { - char name[1024]; + char namebuf[1024]; char *subtype; fz_buffer *buf; pdf_obj *stream = NULL; @@ -141,10 +141,10 @@ static void savefont(pdf_obj *dict, int num) buf = pdf_load_stream(doc, pdf_to_num(stream), pdf_to_gen(stream)); - sprintf(name, "%s-%04d.%s", fontname, num, ext); - printf("extracting font %s\n", name); + snprintf(namebuf, sizeof(namebuf), "%s-%04d.%s", fontname, num, ext); + printf("extracting font %s\n", namebuf); - f = fopen(name, "wb"); + f = fopen(namebuf, "wb"); if (!f) fz_throw(ctx, FZ_ERROR_GENERIC, "Error creating font file"); -- cgit v1.2.3