1. DESKTOP INTEGRATION MANAGEMENT FOR PORTABLE, ZERO-INSTALL AND VIRTUALIZED APPLICATIONS BACHELOR THESIS PRESENTATION BASTIAN EICHER – KIT, 2011

2. Overview Bachelor Thesis Presentation – Bastian Eicher 2 What is wrong with current installers Problem definition Improve an existing zero-install system Proposed solution Domain-specific languages, capturing, applying Design & implementation Qualitative, quantitative Evaluation

3. Problem definition Bachelor Thesis Presentation – Bastian Eicher 3 User controlMultiple versionsLibrariesUninstall

4. Existing technology Bachelor Thesis Presentation – Bastian Eicher 4 Zero-install applications Zero Install Portable applications Portable Apps.com Application virtualization ThinAppApp-V InstallFree Bridge

5. Desktop Integration Handler File endingns Burn CDs, etc. Services Browser Mail client Icons Start menu Desktop Bachelor Thesis Presentation – Bastian Eicher 5

6. What is Zero Install? Install Without root priveliges Without side-effects Distribute Decentralized, regular websites Directly upstream from developer Security GnuPG signatures Sha-256 hashes Bachelor Thesis Presentation – Bastian Eicher 6

7. Zero Install: Feeds Metadata Name Description Icon Dependencies References to other feeds Implementations Download URLs Archive type SHA hashes Bachelor Thesis Presentation – Bastian Eicher 7 <!-- Base64 Signature iQEcBAABAgAGBQJOBZXzAg8Nq0A... -->

8. Zero Install: Launch process download ArchivesHashes Bachelor Thesis Presentation – Bastian Eicher 8 Inter- face Require ments Depend encies selectrun Dependency injection 0install run http://domain/file.xml Interface URI

9. Proposed solution Bachelor Thesis Presentation – Bastian Eicher 9 Extend Zero Install to provide desktop integration Analyze Installers Desktop environments Design Domain- specific language Implement Toolset Runtime support

10. Design Capabilities Access points Bachelor Thesis Presentation – Bastian Eicher 10 Open with list AutoPlay handler Register as default Desktop icon

11. Domain-specific languages Bachelor Thesis Presentation – Bastian Eicher 11

12. Capturing Classic installer Modify system state Improved Zero Install Register capabilities, add access points Zero Install Extract files Bachelor Thesis Presentation – Bastian Eicher 12 Snapshots Feed

13. Applying Check for conflictsUpdate application listModify registry, create shortcuts, etc. Bachelor Thesis Presentation – Bastian Eicher 13 0install integrate-app http://domain/file.xml...

14. Sync Application list as XML AES-128 encryption UploadDownload AES-128 decryption Bachelor Thesis Presentation – Bastian Eicher 14 HTTP PUTHTTP GET 3-way merge

15. Implementation Desktop integration Branch of Windows port C# 2.0 Windows port Developed outside of thesis C# 2.0 Original Zero Install Pre-existing project Python Bachelor Thesis Presentation – Bastian Eicher 15

16. Problem: Runtime modifications Bachelor Thesis Presentation – Bastian Eicher 16 Access pointZero Install Select version Dependency injection Target application Access point Fixed version Target application

17. Solution: API hooking Bachelor Thesis Presentation – Bastian Eicher 17 Application Zero Install Windows registry Application settings Reference to specific app version Reference to 0install run

18. Problem: Metadata in EXEs Bachelor Thesis Presentation – Bastian Eicher 18

19. Solution: Stubs Bachelor Thesis Presentation – Bastian Eicher 19 Interface URICommand nameBinary name http://mozilla.org/ firefox.xml safe-mode firefox SHA-256...\stubs\e55b7669206cfd44fe6676b53...\firefox.exe

20. Evaluation: Qualitative INSTALLATIONRUNTIME Use cases: File double-click Default browser Command line Context menu AutoPlay Bachelor Thesis Presentation – Bastian Eicher 20 Classic installers Zero Install Captured: File types, protocols, … Not captured: Browser plugins, drivers, …

21. Evaluation: Quantitative PERFORMANCE Solving time: ~1.3 s Plain Zero Install Startup delay: ~250 ms Delay per API: ~460 ns API hooking STABILITY API hooking captures all supported changes Causes memory access violations in some applications May be improved using application virtualization methods Bachelor Thesis Presentation – Bastian Eicher 21

22. Conclusion Zero Install can now provide desktop integration equivalent to classic installers Bachelor Thesis Presentation – Bastian Eicher 22