openssl/openssl
Feb 2025 – Mar 2025
2 Months active
Languages Used
AssemblyMarkdownPerl
Technical Skills
Assembly languageCryptographyDocumentationLow-level programmingSystem programmingAssembly optimization
Dan Pittman
PROFILE
Dan Pittman
Daniel Pittman contributed to the openssl/openssl repository by enhancing cryptographic performance and security in low-level assembly code. He improved Windows x64 ABI compatibility for the aesni-xts-avx512 implementation, ensuring correct calling conventions and stack handling, and documented AVX-512 support for AES-XTS to clarify hardware applicability and performance expectations. In March, Daniel addressed a critical out-of-bounds memory read in AVX-512 XTS decryption, adjusting register usage to maintain decryption integrity and memory safety. His work demonstrated expertise in assembly language, cryptography, and system programming, delivering robust, well-documented improvements to OpenSSL’s hardware-accelerated cryptographic paths.
Overall Statistics
Feature vs Bugs
33%Features
Repository Contributions
3Total
Bugs
2
Commits
3
Features
1
Lines of code
46
Activity Months2
Your Network
2184 people
Work History
March 2025
1 Commits
Mar 1, 2025Month: 2025-03 – openssl/openssl. Summary of March work focused on security and reliability in high-performance cryptography paths. Key feature delivered: a security bug fix for AVX-512 XTS decryption that prevents out-of-bounds memory reads by adjusting memory access to a smaller register size, preserving decryption integrity and performance. No new user-facing features were added this month; the priority was hardening the cryptographic path and validating correctness under optimized hardware paths. Major bugs fixed: - Out-of-bounds read in AVX-512 XTS decryption (commit 8ca8f9afbb870293fb0a9dd74cfead9b7767596f). Overall impact and accomplishments: - Strengthened security posture and reliability of OpenSSL’s decryption path, reducing memory-safety risk in critical cryptographic operations while maintaining performance. - Demonstrated discipline in code review, debugging, and validation of cryptographic correctness at the hardware-accelerated path level. Technologies/skills demonstrated: - Low-level memory safety, AVX-512 intrinsics, XTS mode implementation, cryptographic correctness validation, OpenSSL codebase proficiency.
1 Commits
Mar 1, 2025Month: 2025-03 – openssl/openssl. Summary of March work focused on security and reliability in high-performance cryptography paths. Key feature delivered: a security bug fix for AVX-512 XTS decryption that prevents out-of-bounds memory reads by adjusting memory access to a smaller register size, preserving decryption integrity and performance. No new user-facing features were added this month; the priority was hardening the cryptographic path and validating correctness under optimized hardware paths. Major bugs fixed: - Out-of-bounds read in AVX-512 XTS decryption (commit 8ca8f9afbb870293fb0a9dd74cfead9b7767596f). Overall impact and accomplishments: - Strengthened security posture and reliability of OpenSSL’s decryption path, reducing memory-safety risk in critical cryptographic operations while maintaining performance. - Demonstrated discipline in code review, debugging, and validation of cryptographic correctness at the hardware-accelerated path level. Technologies/skills demonstrated: - Low-level memory safety, AVX-512 intrinsics, XTS mode implementation, cryptographic correctness validation, OpenSSL codebase proficiency.
March 2025
February 2025
2 Commits • 1 Features
Feb 1, 2025In February 2025, contributions to openssl/openssl focused on Windows compatibility improvements and documenting AVX-512 support for AES-XTS. Key changes improved cross-platform reliability and clarified performance expectations for modern CPUs. The team addressed a Windows x64 ABI issue in aesni-xts-avx512 and added an AVX-512 note to CHANGES.md to inform users and maintainers about hardware applicability and potential performance benefits. Commit references provide traceability: ddc8529e872348ad47df2ba55ffac1626637fa54 (windows calling convention fix) and 96889735960260c6e4b5d9bc2d298e729c7f7269 (CHANGES.md note).
February 2025
2 Commits • 1 Features
Feb 1, 2025In February 2025, contributions to openssl/openssl focused on Windows compatibility improvements and documenting AVX-512 support for AES-XTS. Key changes improved cross-platform reliability and clarified performance expectations for modern CPUs. The team addressed a Windows x64 ABI issue in aesni-xts-avx512 and added an AVX-512 note to CHANGES.md to inform users and maintainers about hardware applicability and potential performance benefits. Commit references provide traceability: ddc8529e872348ad47df2ba55ffac1626637fa54 (windows calling convention fix) and 96889735960260c6e4b5d9bc2d298e729c7f7269 (CHANGES.md note).
Activity
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Quality Metrics
Correctness93.4%
Maintainability86.6%
Architecture86.6%
Performance93.4%
AI Usage20.0%
Skills & Technologies
Programming Languages
AssemblyMarkdownPerl
Technical Skills
Assembly languageAssembly optimizationCryptographyDocumentationLow-level programmingSystem programming
Repositories Contributed To
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