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Can your diff(1) do this?! Can your diff(1) do this?! Improving - PowerPoint PPT Presentation

Jan 11, 2023 •190 likes •861 views

Can your diff(1) do this?! Can your diff(1) do this?! Improving soware review & QA with diffoscope Improving soware review & QA with diffoscope Chris Lamb Chris Lamb foss-north.se foss-north.se @lolamby @lolamby April 2018

  1. Can your diff(1) do this?! Can your diff(1) do this?! Improving so�ware review & QA with diffoscope Improving so�ware review & QA with diffoscope Chris Lamb Chris Lamb foss-north.se foss-north.se @lolamby @lolamby April 2018 April 2018 Debian Project Leader Debian Project Leader Gothenburg, Sweden Gothenburg, Sweden

  2. Hallå! Hallå!

  3. Open source developer for 10+ years Debian Project Leader opensource.org board member Freelance so�ware developer

  7. Why? Why?

  8. Source code available for free so�ware… … everyone runs binaries Do they correspond?

  9. Build farms Developer's machines Blackmail, law-enforcement…

  10. 1. Ensure build have identical results 2. Multiple parties compare results 3. Attacker must infect everybody simultaneously

  11. Identical results? Identical results?

  21. Archive formats Archive formats

  22. Compressed formats Compressed formats

  23. Recursive Recursive

  24. Line ordering Line ordering

  25. HTML output HTML output

  26. Android boot ROMs, Android APKs, ar archives, bzip2 files, Coreboot cbfs, CPIO archives, Dalvik dex file, Debian packages, device (mknod), device tree globs, directories, docx, ELF binaries, ext filesystem images, fontconfig cache dirs, fonts, gettext catalogues, GIF images, Git repositories, GZip files, Haskell binaries, ICC colour profiles, ISO images, Java, bytecode, Javascript, JSON, LLVM binaries, Macho binaries, Mono executables, odt documentens, Ogg borbis, OpenSSH keys, Pascal binaries, PDF files, PGP/GPG keys, PNG images, PostScript, RPM images, R statistical data, Rust binaries, SQLite databases, squashfs images, symlinks, tar archives, tcpdump dumps, text files, XML documents, XZ files, ZIP archives …

  27. Android images Android images

  28. Berkeley DB databases Berkeley DB databases

  30. Microso� Word Microso� Word .docx .docx

  31. Ebooks Ebooks

  33. Mono binaries Mono binaries

  34. git(1) repositories repositories git(1)

  35. Gnumeric spreadsheets Gnumeric spreadsheets

  36. ISO images ISO images

  40. JSON JSON

  41. OpenDocument text documents OpenDocument text documents

  42. Ogg audio files Ogg audio files

  44. tcpdump(1) capture files capture files tcpdump(1)

  46. PDF PDF

  48. XML documents XML documents

  49. Using diffoscope for QA Using diffoscope for QA

  50. Just see changes you expect Just see changes you expect

  51. Seeing "no" changes Seeing "no" changes

  52. Security releases Security releases

  54. Security "releases" Security "releases"

  56. Getting started Getting started

  57. try.diffoscope.org try.diffoscope.org

  59. Current status Current status

  63. Parallel processing Parallel processing Multiple previous attempts… … Juliana Oliveira working on this now

  64. diffoscope.org diffoscope.org

  65. Tack! Tack! @lolamby @lolamby diffoscope.org diffoscope.org lamby@debian.org lamby@debian.org chris-lamb.co.uk chris-lamb.co.uk

  66. @lolamby @lolamby diffoscope.org diffoscope.org lamby@debian.org lamby@debian.org chris-lamb.co.uk chris-lamb.co.uk

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