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fix(png) check png magic number to be sure it's a png image

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Gabor Kiss-Vamosi
2022-01-03 20:10:26 +01:00
parent 92016ccac7
commit 1092550775
1 changed files with 2 additions and 0 deletions
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src/extra/libs/png/lv_png.c
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@@ -98,6 +98,8 @@ static lv_res_t decoder_info(struct _lv_img_decoder_t * decoder, const void * sr
/*If it's a PNG file in a C array...*/ /*If it's a PNG file in a C array...*/
else if(src_type == LV_IMG_SRC_VARIABLE) { else if(src_type == LV_IMG_SRC_VARIABLE) {
const lv_img_dsc_t * img_dsc = src; const lv_img_dsc_t * img_dsc = src;
const uint8_t magic[] = {0x89, 0x50, 0x4e, 0x47, 0x0d, 0x0a, 0x1a, 0x0a};
if(memcmp(magic, img_dsc->data, sizeof(magic))) return LV_RES_INV;
header->always_zero = 0; header->always_zero = 0;
header->cf = img_dsc->header.cf; /*Save the color format*/ header->cf = img_dsc->header.cf; /*Save the color format*/
header->w = img_dsc->header.w; /*Save the color width*/ header->w = img_dsc->header.w; /*Save the color width*/