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[libpng17] Fixed length written to uncompressed iTXt chunks (Samuli Suominen).

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This commit is contained in:
Glenn Randers-Pehrson
2013-04-13 16:23:48 -05:00
parent 23674b75be
commit 55e93d7090
3 changed files with 4 additions and 2 deletions
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4
pngwutil.c
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@@ -1742,16 +1742,16 @@ png_write_iTXt(png_structrp png_ptr, int compression, png_const_charp key,
{
if (png_text_compress(png_ptr, png_iTXt, &comp, prefix_len) != Z_OK)
png_error(png_ptr, png_ptr->zstream.msg);
png_write_chunk_header(png_ptr, png_iTXt, comp.output_len + prefix_len);
}
else
{
if (comp.input_len > PNG_UINT_31_MAX-prefix_len)
png_error(png_ptr, "iTXt: uncompressed text too long");
png_write_chunk_header(png_ptr, png_iTXt, strlen(text) + prefix_len);
}
png_write_chunk_header(png_ptr, png_iTXt, comp.output_len + prefix_len);
png_write_chunk_data(png_ptr, new_key, key_len);
png_write_chunk_data(png_ptr, (png_const_bytep)lang, lang_len);