openssl/openssl
Apr 2026 – Apr 2026
1 Month active
Languages Used
Perl
Technical Skills
cryptographylow-level programmingperformance optimization
Jan Damborsky
PROFILE
Jan Damborsky
Contributed to the openssl/openssl repository by addressing a critical off-by-one bug in AES optimizations for Fujitsu SPARC CPUs, which previously posed a risk of segmentation faults and performance regressions. The work involved low-level programming and careful debugging within the OpenSSL codebase, focusing on cryptographic stability and cross-CPU architecture validation. Using C and Perl, the developer collaborated with reviewers to ensure the fix aligned with OpenSSL’s reliability goals. The solution improved the stability and performance of AES cryptographic operations on SPARC platforms, demonstrating expertise in performance optimization, code review, and the Git-based pull request workflow for open source contributions.
Overall Statistics
Feature vs Bugs
0%Features
Repository Contributions
1Total
Bugs
1
Commits
1
Features
0
Lines of code
15
Activity Months1
Your Network
388 peopleShared Repositories
388
Work History
April 2026
1 Commits
Apr 1, 2026Concise monthly summary for 2026-04 (openssl/openssl): Key features delivered: - AES optimisation off-by-one bug fix for Fujitsu SPARC CPUs, addressing an off-by-one error and SEGV risk; improves stability and performance of AES paths. Major bugs fixed: - Off-by-one bug in AES optimisations for Fujitsu SPARC CPUs fixed (issue #29085); merged as PR 30814 on Apr 17, 2026 with reviews from Tomas Mraz, Shane Lontis, and Paul Dale. Overall impact and accomplishments: - Stabilized cryptographic operations on Fujitsu SPARC platforms; reduced crash risk and potential performance regressions; demonstrated strong debugging skills and cross-team collaboration. Aligns with OpenSSL reliability and platform-compatibility goals. Technologies/skills demonstrated: - C, OpenSSL codebase, AES path optimization, cross-CPU architecture validation (Fujitsu SPARC), expert code review, and Git PR workflow.
1 Commits
Apr 1, 2026Concise monthly summary for 2026-04 (openssl/openssl): Key features delivered: - AES optimisation off-by-one bug fix for Fujitsu SPARC CPUs, addressing an off-by-one error and SEGV risk; improves stability and performance of AES paths. Major bugs fixed: - Off-by-one bug in AES optimisations for Fujitsu SPARC CPUs fixed (issue #29085); merged as PR 30814 on Apr 17, 2026 with reviews from Tomas Mraz, Shane Lontis, and Paul Dale. Overall impact and accomplishments: - Stabilized cryptographic operations on Fujitsu SPARC platforms; reduced crash risk and potential performance regressions; demonstrated strong debugging skills and cross-team collaboration. Aligns with OpenSSL reliability and platform-compatibility goals. Technologies/skills demonstrated: - C, OpenSSL codebase, AES path optimization, cross-CPU architecture validation (Fujitsu SPARC), expert code review, and Git PR workflow.
April 2026
Activity
Loading activity data...
Quality Metrics
Correctness100.0%
Maintainability80.0%
Architecture80.0%
Performance100.0%
AI Usage20.0%
Skills & Technologies
Programming Languages
Perl
Technical Skills
cryptographylow-level programmingperformance optimization
Repositories Contributed To
Overview of all repositories you've contributed to across your timeline