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Ryo Kajiwara

PROFILE

Ryo Kajiwara

Worked on the Shopify/ruby repository to deliver Hybrid Public Key Encryption (HPKE) API support within the Ruby OpenSSL extension, focusing on secure message encryption and decryption using hybrid cryptographic techniques. The implementation involved C programming and Ruby development, with careful attention to cryptography standards such as RFC 9180. Developed comprehensive test coverage for DHKEM, validating encapsulation and decapsulation across both X25519 and NIST curves. Ensured compatibility with OpenSSL 3.5+ and support for non-FIPS builds, enhancing interoperability and reliability. No major user-facing bug fixes were recorded, as the work concentrated on strengthening security and test robustness for future development.

Overall Statistics

Feature vs Bugs

100%Features

Repository Contributions

2Total
Bugs
0
Commits
2
Features
1
Lines of code
830
Activity Months1

Work History

June 2026

2 Commits • 1 Features

Jun 1, 2026

June 2026 monthly summary for Shopify/ruby focused on delivering HPKE API support in the Ruby OpenSSL extension and establishing robust DHKEM test coverage. No major user-facing bug fixes recorded this month; the work strengthens security, interoperability, and test reliability across non-FIPS configurations and OpenSSL 3.5+.

Activity

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Quality Metrics

Correctness100.0%
Maintainability90.0%
Architecture100.0%
Performance90.0%
AI Usage40.0%

Skills & Technologies

Programming Languages

CRuby

Technical Skills

API designC programmingCryptographyOpenSSLRubyRuby developmentTestingcryptography

Repositories Contributed To

1 repo

Overview of all repositories you've contributed to across your timeline

Shopify/ruby

Jun 2026 Jun 2026
1 Month active

Languages Used

CRuby

Technical Skills

API designC programmingCryptographyOpenSSLRubyRuby development