Clone this repo:
  1. 6300460 Merge pull request #207 from jfkthame/master by Khaled Hosny · 13 days ago master
  2. 373523f Sanitize the PSname to work around buggy consumers by Jonathan Kew · 13 days ago
  3. bbd729f Merge pull request #206 from jfkthame/patch-2 by Khaled Hosny · 5 weeks ago
  4. d2648ba Remove spurious component_count check by jfkthame · 5 weeks ago
  5. 968e5f9 [ci] Try to fix macOS build by Khaled Hosny · 5 months ago

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OpenType Sanitizer

The OpenType Sanitizer (OTS) parses and serializes OpenType files (OTF, TTF) and WOFF and WOFF2 font files, validating them and sanitizing them as it goes.

The C library is integrated into Chromium and Firefox, and also simple command line tools to check files offline in a Terminal.

The CSS font-face property is great for web typography. Having to use images in order to get the correct typeface is a great sadness; one should be able to use vectors.

However, on many platforms the system-level TrueType font renderers have never been part of the attack surface before, and putting them on the front line is a scary proposition... Especially on platforms like Windows, where it's a closed-source blob running with high privilege.

Building from source

Instructions below are for building standalone OTS utilities, if you want to use OTS as a library then the recommended way is to copy the source code and integrate it into your existing build system. Our build system does not build a shared library intentionally.

Build OTS:

$ meson build
$ ninja -C build

Run the tests (if you wish):

$ ninja -C build test

Usage

See docs


Thanks to Alex Russell for the original idea.