openssl/openssl
Aug 2025 – Feb 2026
3 Months active
Languages Used
AssemblyPerl
Technical Skills
Assembly ProgrammingCryptographyLow-level OptimizationPerformance EngineeringRISC-V ArchitectureARM architecture
fengpengbo
PROFILE
Fengpengbo
Contributed to the openssl/openssl repository by developing and optimizing assembly-level cryptographic routines for RISC-V and ARM architectures. Focused on Montgomery multiplication and squaring, this work included porting and tuning assembly code for RV64GC, integrating Perl-based code generation, and updating build configurations to streamline performance improvements. Addressed code maintainability through formatting, instruction scheduling, and register allocation enhancements, while also clarifying technical documentation for ARMv8 assembly. Collaborated with maintainers during code reviews to ensure correctness and cross-architecture compatibility. Leveraged expertise in assembly programming, cryptography, and low-level optimization to deliver measurable throughput gains for TLS operations on 64-bit platforms.
Overall Statistics
Feature vs Bugs
75%Features
Repository Contributions
4Total
Bugs
1
Commits
4
Features
3
Lines of code
2,078
Activity Months3
Your Network
392 peopleSame Organization
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Shared Repositories
365
Work History
February 2026
1 Commits • 1 Features
Feb 1, 2026February 2026 monthly summary for openssl/openssl: Delivered an RV64GC-optimized Montgomery squaring assembly for OpenSSL, ported from ARMv8, to accelerate cryptographic operations on 64-bit platforms. The change was merged after code review and aligns with earlier Montgomery optimization work. This supports faster signing, verification, encryption, and decryption, contributing to higher TLS throughput and better service levels on RV64GC-based deployments.
1 Commits • 1 Features
Feb 1, 2026February 2026 monthly summary for openssl/openssl: Delivered an RV64GC-optimized Montgomery squaring assembly for OpenSSL, ported from ARMv8, to accelerate cryptographic operations on 64-bit platforms. The change was merged after code review and aligns with earlier Montgomery optimization work. This supports faster signing, verification, encryption, and decryption, contributing to higher TLS throughput and better service levels on RV64GC-based deployments.
February 2026
December 2025
2 Commits • 1 Features
Dec 1, 20252025-12 Monthly Summary: Delivered targeted improvements to Montgomery arithmetic in OpenSSL with a focus on correctness and cross-architecture performance. Key highlights include a bug fix clarifying the ARMv8 Montgomery square assembly comment and a performance-oriented optimization for Montgomery multiplication on RV64GC. These changes reduce ambiguity, improve runtime efficiency on ARM and RISC-V platforms, and contribute to stronger TLS performance and security posture across deployed workloads. Demonstrated robust code-quality practices through careful reviews and integration with maintainers Neil Horman and Paul Dale.
December 2025
2 Commits • 1 Features
Dec 1, 20252025-12 Monthly Summary: Delivered targeted improvements to Montgomery arithmetic in OpenSSL with a focus on correctness and cross-architecture performance. Key highlights include a bug fix clarifying the ARMv8 Montgomery square assembly comment and a performance-oriented optimization for Montgomery multiplication on RV64GC. These changes reduce ambiguity, improve runtime efficiency on ARM and RISC-V platforms, and contribute to stronger TLS performance and security posture across deployed workloads. Demonstrated robust code-quality practices through careful reviews and integration with maintainers Neil Horman and Paul Dale.
August 2025
1 Commits • 1 Features
Aug 1, 2025August 2025: Delivered a performance-focused Montgomery multiplication optimization for RV64GC in OpenSSL, including a Perl-based code-generation script and build configuration updates to incorporate the new assembly source. This work significantly enhances modular arithmetic throughput on RV64GC targets, contributing to better TLS performance and server throughput for cryptographic operations. No major bug fixes were completed this month; focus was on feature delivery and platform optimization. Skills demonstrated include low-level assembly optimization, RV64GC architecture knowledge, Perl-based code generation, and build-system integration for performance-oriented crypto components.
1 Commits • 1 Features
Aug 1, 2025August 2025: Delivered a performance-focused Montgomery multiplication optimization for RV64GC in OpenSSL, including a Perl-based code-generation script and build configuration updates to incorporate the new assembly source. This work significantly enhances modular arithmetic throughput on RV64GC targets, contributing to better TLS performance and server throughput for cryptographic operations. No major bug fixes were completed this month; focus was on feature delivery and platform optimization. Skills demonstrated include low-level assembly optimization, RV64GC architecture knowledge, Perl-based code generation, and build-system integration for performance-oriented crypto components.
August 2025
Activity
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Quality Metrics
Correctness95.0%
Maintainability85.0%
Architecture90.0%
Performance95.0%
AI Usage25.0%
Skills & Technologies
Programming Languages
AssemblyPerl
Technical Skills
ARM architectureAssembly ProgrammingCryptographyLow-level OptimizationPerformance EngineeringRISC-V ArchitectureRISC-V architectureassembly languageassembly optimizationcode maintainabilitycryptographylow-level programmingperformance optimizationperformance tuning
Repositories Contributed To
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