openssl/openssl
Sep 2024 – Mar 2026
18 Months active
Languages Used
CMarkdownPerlPodPODJSONPythonpod
Technical Skills
C programmingOpenSSLcryptographysoftware developmentFIPS complianceconfiguration management
slontis
PROFILE
Slontis
Over 18 months, contributed to the openssl/openssl repository by designing and implementing advanced cryptographic features, including post-quantum signature algorithms such as LMS, SLH-DSA, and ML-DSA, as well as enhancing FIPS compliance and key management workflows. Leveraged C and assembly language to deliver robust algorithm integration, memory management improvements, and security-focused bug fixes. Drove code quality through documentation updates, refactoring, and expanded test coverage, while maintaining cross-platform reliability and CI stability. Addressed interoperability and compliance by updating encoding/decoding pathways and enforcing policy-aligned configurations, resulting in a maintainable, standards-aligned codebase that supports evolving cryptographic and regulatory requirements.
Overall Statistics
Feature vs Bugs
71%Features
Repository Contributions
114Total
Bugs
14
Commits
114
Features
34
Lines of code
55,700
Activity Months18
Your Network
1148 peopleSame Organization
@oracle.com783
Aaron YoungMember
Carlos-CA-AlvarezMember
Dyre TjeldvollMember
grungtaMember
Kaiyuan LiMember
KarthikMember
Liam R. HowlettMember
Liam R. HowlettMember
Martin BalinMember
Shared Repositories
365
Work History
March 2026
11 Commits • 3 Features
Mar 1, 2026Month: 2026-03. In OpenSSL, delivered high-impact enhancements across PKCS12, core cryptography reliability, API cleanliness, and contributor experience. Key outcomes include improved PKCS12 MAC verification correctness and error handling, migration to EVP_MAC, and expanded correctness fixes across CSHAKE, SLH-DSA, and Windows ARM64EC path handling. Deprecated legacy EVP_CIPHER_CTX_num APIs in preparation for engines removal. Documentation and process improvements to streamline contributions and ML-DSA clarity. These changes collectively enhance security, reliability, developer productivity, and business value by reducing error-prone paths and improving cryptographic robustness.
11 Commits • 3 Features
Mar 1, 2026Month: 2026-03. In OpenSSL, delivered high-impact enhancements across PKCS12, core cryptography reliability, API cleanliness, and contributor experience. Key outcomes include improved PKCS12 MAC verification correctness and error handling, migration to EVP_MAC, and expanded correctness fixes across CSHAKE, SLH-DSA, and Windows ARM64EC path handling. Deprecated legacy EVP_CIPHER_CTX_num APIs in preparation for engines removal. Documentation and process improvements to streamline contributions and ML-DSA clarity. These changes collectively enhance security, reliability, developer productivity, and business value by reducing error-prone paths and improving cryptographic robustness.
March 2026
February 2026
10 Commits • 5 Features
Feb 1, 2026February 2026 highlights for openssl/openssl focused on delivering business value through hardened crypto primitives, reliable build/configuration, and improved key-management workflows. Key features and improvements delivered this month include: - AES-WRAP robustness and large key support: increased CipherUpdate internal buffer from 4K to 8K, added enforcement that update is only allowed once, and introduced tests for AES-WRAP usage and error handling. This enables secure handling of larger PQ private keys and reduces runtime errors for non-streamable operations. - SRTP Key Derivation validation and documentation: added input limit checks for key length, index length, and cipher validity; updated documentation to clarify limits, reducing misconfigurations and potential policy violations. - RSAz assembler bug fixes: corrected uninitialized variables in rsaz-3k-avxifma and rsaz-4k-avxifma, preventing incorrect variable usage and related instability. - FIPS self-tests configuration and modularity: ensured correct options are applied for -no-bulk builds and improved modularity of self-tests, increasing reliability across varied build configurations. - SHA3 platform-specific refactor: renamed and reorganized SHA3 platform methods to improve dispatch consistency, platform-specific calls, and CI stability; enhances maintainability. - EC_GROUP_check explicit curve validation: updated to fail explicit curves, strengthening security compliance and reducing risk of misvalidated curve usage.
February 2026
10 Commits • 5 Features
Feb 1, 2026February 2026 highlights for openssl/openssl focused on delivering business value through hardened crypto primitives, reliable build/configuration, and improved key-management workflows. Key features and improvements delivered this month include: - AES-WRAP robustness and large key support: increased CipherUpdate internal buffer from 4K to 8K, added enforcement that update is only allowed once, and introduced tests for AES-WRAP usage and error handling. This enables secure handling of larger PQ private keys and reduces runtime errors for non-streamable operations. - SRTP Key Derivation validation and documentation: added input limit checks for key length, index length, and cipher validity; updated documentation to clarify limits, reducing misconfigurations and potential policy violations. - RSAz assembler bug fixes: corrected uninitialized variables in rsaz-3k-avxifma and rsaz-4k-avxifma, preventing incorrect variable usage and related instability. - FIPS self-tests configuration and modularity: ensured correct options are applied for -no-bulk builds and improved modularity of self-tests, increasing reliability across varied build configurations. - SHA3 platform-specific refactor: renamed and reorganized SHA3 platform methods to improve dispatch consistency, platform-specific calls, and CI stability; enhances maintainability. - EC_GROUP_check explicit curve validation: updated to fail explicit curves, strengthening security compliance and reducing risk of misvalidated curve usage.
January 2026
4 Commits • 3 Features
Jan 1, 2026January 2026 monthly summary for openssl/openssl focused on delivering security-conscious configurability, policy-aligned feature additions, and improved code quality. Key outcomes include configurable KDF options across multiple algorithms, new OID support for HSS-LMS hash signatures, and formatting consistency improvements that reduce maintenance overhead and align with clang-format standards. These changes collectively reduce attack surface, improve policy compliance, and enhance maintainability while delivering concrete business value to security-sensitive deployments.
4 Commits • 3 Features
Jan 1, 2026January 2026 monthly summary for openssl/openssl focused on delivering security-conscious configurability, policy-aligned feature additions, and improved code quality. Key outcomes include configurable KDF options across multiple algorithms, new OID support for HSS-LMS hash signatures, and formatting consistency improvements that reduce maintenance overhead and align with clang-format standards. These changes collectively reduce attack surface, improve policy compliance, and enhance maintainability while delivering concrete business value to security-sensitive deployments.
January 2026
December 2025
4 Commits • 1 Features
Dec 1, 2025Month 2025-12: Focused on delivering OpenSSL LMS/HSS enhancements to ensure post-quantum cryptography readiness and strengthen verification tooling. Delivered core feature set with strong validation support and observable tracing for maintenance and audits. Generated test data in line with BouncyCastle references to validate interoperability. No major customer-facing bug fixes recorded this month; effort concentrated on robust feature delivery, documentation, and code quality to reduce future risk.
December 2025
4 Commits • 1 Features
Dec 1, 2025Month 2025-12: Focused on delivering OpenSSL LMS/HSS enhancements to ensure post-quantum cryptography readiness and strengthen verification tooling. Delivered core feature set with strong validation support and observable tracing for maintenance and audits. Generated test data in line with BouncyCastle references to validate interoperability. No major customer-facing bug fixes recorded this month; effort concentrated on robust feature delivery, documentation, and code quality to reduce future risk.
November 2025
4 Commits • 2 Features
Nov 1, 2025November 2025: OpenSSL development focused on reliability, usability, and cryptographic capability expansion. Delivered critical bug fixes and feature improvements with clear business value: improved correctness of libctx/propq propagation, enhanced AES-GCM usability via automatic IV generation, maintained CI/interoperability with older FIPS providers, and expanded cryptographic capabilities with ML-DSA-MU digest support.
4 Commits • 2 Features
Nov 1, 2025November 2025: OpenSSL development focused on reliability, usability, and cryptographic capability expansion. Delivered critical bug fixes and feature improvements with clear business value: improved correctness of libctx/propq propagation, enhanced AES-GCM usability via automatic IV generation, maintained CI/interoperability with older FIPS providers, and expanded cryptographic capabilities with ML-DSA-MU digest support.
November 2025
October 2025
2 Commits • 2 Features
Oct 1, 2025OpenSSL monthly summary for 2025-10 focused on delivering CI stability and configurable build workflows, with clear business impact and technical accomplishment signals for performance reviews.
October 2025
2 Commits • 2 Features
Oct 1, 2025OpenSSL monthly summary for 2025-10 focused on delivering CI stability and configurable build workflows, with clear business impact and technical accomplishment signals for performance reviews.
September 2025
1 Commits • 1 Features
Sep 1, 2025Month: 2025-09 — OpenSSL contribution: CSHAKE support added to openssl/openssl. This feature expands cryptographic capabilities by introducing an extendable-output function with customizable inputs, enabling new protocol support and flexible security configurations. The implementation introduces conditional encoding that uses KECCAK[c] when custom strings are provided, and SHAKE when not, with a sensible default XOF length to avoid the default-length issue. The change includes a single primary commit (9c738431411e9f87d144793802b74e5ffd019403) merged from PR 28432, with reviews from Paul Dale and Norbert Pocs. No major bugs fixed this month across the repo. Impact: improved interoperability with CSHAKE-enabled protocols, better adaptability for future cryptographic workflows, and maintained code quality through peer review. Skills: C, cryptography primitives (SHAKE/KECCAK/CSHAKE), OpenSSL contribution process, code reviews, maintainability.
1 Commits • 1 Features
Sep 1, 2025Month: 2025-09 — OpenSSL contribution: CSHAKE support added to openssl/openssl. This feature expands cryptographic capabilities by introducing an extendable-output function with customizable inputs, enabling new protocol support and flexible security configurations. The implementation introduces conditional encoding that uses KECCAK[c] when custom strings are provided, and SHAKE when not, with a sensible default XOF length to avoid the default-length issue. The change includes a single primary commit (9c738431411e9f87d144793802b74e5ffd019403) merged from PR 28432, with reviews from Paul Dale and Norbert Pocs. No major bugs fixed this month across the repo. Impact: improved interoperability with CSHAKE-enabled protocols, better adaptability for future cryptographic workflows, and maintained code quality through peer review. Skills: C, cryptography primitives (SHAKE/KECCAK/CSHAKE), OpenSSL contribution process, code reviews, maintainability.
September 2025
August 2025
2 Commits • 1 Features
Aug 1, 2025OpenSSL/OpenSSL (2025-08) monthly summary: Key fixes and a security/compliance feature in the ECDSA/DSA path under FIPS mode. Addressed a BN_CTX-related issue causing S390 deterministic mode test failures and implemented digest restrictions to enforce FIPS-compliant signatures, improving reliability, security, and regulatory alignment.
August 2025
2 Commits • 1 Features
Aug 1, 2025OpenSSL/OpenSSL (2025-08) monthly summary: Key fixes and a security/compliance feature in the ECDSA/DSA path under FIPS mode. Addressed a BN_CTX-related issue causing S390 deterministic mode test failures and implemented digest restrictions to enforce FIPS-compliant signatures, improving reliability, security, and regulatory alignment.
July 2025
6 Commits • 2 Features
Jul 1, 2025Month: 2025-07. Repository: openssl/openssl. This month focused on strengthening LMS robustness, improving ECX/ED key parameter handling, and updating FIPS provider documentation. Key outcomes include expanded LMS test coverage with NIST ACVP data, fixes for dereference-after-free and bad public key handling in LMS verifications, refactoring to improve security category and FIPS indicator handling for ECX/ED, and clarified SHAKE and KECCAK-KMAC usage in FIPS provider docs. These efforts enhance security, compliance, and maintainability with concrete test data and targeted fixes.
6 Commits • 2 Features
Jul 1, 2025Month: 2025-07. Repository: openssl/openssl. This month focused on strengthening LMS robustness, improving ECX/ED key parameter handling, and updating FIPS provider documentation. Key outcomes include expanded LMS test coverage with NIST ACVP data, fixes for dereference-after-free and bad public key handling in LMS verifications, refactoring to improve security category and FIPS indicator handling for ECX/ED, and clarified SHAKE and KECCAK-KMAC usage in FIPS provider docs. These efforts enhance security, compliance, and maintainability with concrete test data and targeted fixes.
July 2025
June 2025
2 Commits • 1 Features
Jun 1, 2025June 2025: Delivered maintenance-focused updates to the OpenSSL FIPS provider documentation and self-test data cleanup for openssl/openssl. Changes are non-functional, aimed at aligning docs with current code, clarifying testing procedures, and reducing test data footprint. These improvements facilitate future maintenance and compliance readiness without impacting runtime behavior.
June 2025
2 Commits • 1 Features
Jun 1, 2025June 2025: Delivered maintenance-focused updates to the OpenSSL FIPS provider documentation and self-test data cleanup for openssl/openssl. Changes are non-functional, aimed at aligning docs with current code, clarifying testing procedures, and reducing test data footprint. These improvements facilitate future maintenance and compliance readiness without impacting runtime behavior.
April 2025
2 Commits • 1 Features
Apr 1, 2025April 2025 — OpenSSL repository (openssl/openssl). Focused on stabilizing key derivation workflows and improving cryptographic guidance to align with current best practices. Key outcomes include: (1) Bug fix for EVP_PKEY_CTX_dup crash by duplicating the internal keymanager, addressing segmentation faults in EVP_PKEY_derive_set_peer_ex() and improving key derivation stability (commit 3c22da73465f5dd211299e64f0de8786dcaf86c3). (2) Documentation update: Keys and cryptographic algorithms guidance, reflecting updated recommendations such as replacing DSA with ECDSA, updating RSA key generation to AES-256, clarifying EC key generation, and adding sections for X25519/X448 and Ed25519/Ed448, plus ML-DSA and ML-KEM keys (commit 86a6d1f9b45a8a79740222821d8bcf66c34f2839).
2 Commits • 1 Features
Apr 1, 2025April 2025 — OpenSSL repository (openssl/openssl). Focused on stabilizing key derivation workflows and improving cryptographic guidance to align with current best practices. Key outcomes include: (1) Bug fix for EVP_PKEY_CTX_dup crash by duplicating the internal keymanager, addressing segmentation faults in EVP_PKEY_derive_set_peer_ex() and improving key derivation stability (commit 3c22da73465f5dd211299e64f0de8786dcaf86c3). (2) Documentation update: Keys and cryptographic algorithms guidance, reflecting updated recommendations such as replacing DSA with ECDSA, updating RSA key generation to AES-256, clarifying EC key generation, and adding sections for X25519/X448 and Ed25519/Ed448, plus ML-DSA and ML-KEM keys (commit 86a6d1f9b45a8a79740222821d8bcf66c34f2839).
April 2025
March 2025
4 Commits
Mar 1, 2025Concise monthly summary for 2025-03 focusing on OpenSSL work: delivered targeted bug fixes, improved robustness on ARMv8, and code quality improvements that enhance security correctness, cross-platform reliability, and maintainability.
March 2025
4 Commits
Mar 1, 2025Concise monthly summary for 2025-03 focusing on OpenSSL work: delivered targeted bug fixes, improved robustness on ARMv8, and code quality improvements that enhance security correctness, cross-platform reliability, and maintainability.
February 2025
18 Commits • 3 Features
Feb 1, 2025February 2025 monthly summary for openssl/openssl focusing on key features delivered, major bug fixes, and overall impact. Delivered critical SLH-DSA and ML-DSA capabilities, expanded verification/testing coverage (TLS, ACVP, Wycheproof), and strengthened compliance with FIPS/pbkdf2 and stability of FIPS encoder. The changes improved interoperability, security posture, and developer efficiency by providing X.509 certificate generation via CLI, TLS-SIGALG support, and robust test vectors.
18 Commits • 3 Features
Feb 1, 2025February 2025 monthly summary for openssl/openssl focusing on key features delivered, major bug fixes, and overall impact. Delivered critical SLH-DSA and ML-DSA capabilities, expanded verification/testing coverage (TLS, ACVP, Wycheproof), and strengthened compliance with FIPS/pbkdf2 and stability of FIPS encoder. The changes improved interoperability, security posture, and developer efficiency by providing X.509 certificate generation via CLI, TLS-SIGALG support, and robust test vectors.
February 2025
January 2025
16 Commits • 2 Features
Jan 1, 2025January 2025 focused on delivering production-ready ML-DSA capabilities in OpenSSL and strengthening test coverage. Achieved end-to-end ML-DSA support from encoding/decoding and key management to certificate generation via the OpenSSL CLI, complemented by automated ACVP validation and robust documentation.
January 2025
16 Commits • 2 Features
Jan 1, 2025January 2025 focused on delivering production-ready ML-DSA capabilities in OpenSSL and strengthening test coverage. Achieved end-to-end ML-DSA support from encoding/decoding and key management to certificate generation via the OpenSSL CLI, complemented by automated ACVP validation and robust documentation.
December 2024
3 Commits • 1 Features
Dec 1, 2024December 2024 monthly summary for openssl/openssl focusing on ML-DSA integration within the OpenSSL provider. Delivered end-to-end ML-DSA support including key generation, encoding/decoding, signing and verification, with parameter handling improvements and memory management refactor for vectors/matrices. Added robust test vectors to validate end-to-end ML-DSA flows in compliance with FIPS 204.
3 Commits • 1 Features
Dec 1, 2024December 2024 monthly summary for openssl/openssl focusing on ML-DSA integration within the OpenSSL provider. Delivered end-to-end ML-DSA support including key generation, encoding/decoding, signing and verification, with parameter handling improvements and memory management refactor for vectors/matrices. Added robust test vectors to validate end-to-end ML-DSA flows in compliance with FIPS 204.
December 2024
November 2024
18 Commits • 3 Features
Nov 1, 2024November 2024 monthly summary for openssl/openssl: Focused on delivering a robust SLH-DSA integration into OpenSSL, ensuring practical post-quantum signing capabilities within enterprise-grade cryptographic workflows. Emphasis on security hygiene, regulatory alignment (FIPS), and developer-friendly adoption through documentation and build configurability.
November 2024
18 Commits • 3 Features
Nov 1, 2024November 2024 monthly summary for openssl/openssl: Focused on delivering a robust SLH-DSA integration into OpenSSL, ensuring practical post-quantum signing capabilities within enterprise-grade cryptographic workflows. Emphasis on security hygiene, regulatory alignment (FIPS), and developer-friendly adoption through documentation and build configurability.
October 2024
5 Commits • 1 Features
Oct 1, 2024October 2024 OpenSSL LMS milestone: Completed Leighton-Micali Signature (LMS) support across verification, public-key handling, FIPS provider integration, and build configuration, with comprehensive documentation. This work enhances post-quantum readiness and compliance within the OpenSSL toolchain and ecosystem.
5 Commits • 1 Features
Oct 1, 2024October 2024 OpenSSL LMS milestone: Completed Leighton-Micali Signature (LMS) support across verification, public-key handling, FIPS provider integration, and build configuration, with comprehensive documentation. This work enhances post-quantum readiness and compliance within the OpenSSL toolchain and ecosystem.
October 2024
September 2024
2 Commits • 2 Features
Sep 1, 2024Month: 2024-09 | Focus: core feature delivery in the openssl/openssl repository, with emphasis on cryptographic compliance, interoperability, and maintainability. Key features delivered: - FIPS provider cryptography enhancements: Introduced SHA256-192 as an internal digest option within the FIPS provider and reorganized the internal digest table to streamline handling of KMAC-related algorithms, improving cryptographic functionality and compliance. - LMS XDR public key decoder for OpenSSL: Added a decoder for LMS public keys in XDR format, including calculations of key sizes, decoding of public keys, and integration with the existing key management system. Impact and accomplishments: - Strengthened FIPS compliance and cryptographic functionality, enabling broader internal usage of SHA256-192 and more efficient digest handling for KMAC-related algorithms. - Improved interoperability with LMS-based PKI through XDR-decoded public keys and seamless integration with the key management infrastructure. - Delivered focused feature work with clean integration points into existing crypto and key management code paths, aiding future enhancements and audits. Technologies/skills demonstrated: - C, OpenSSL architecture, FIPS provider module design, and digest/KMAC handling - XDR decoding and integration with key management systems - Code organization and incremental refactoring for cryptographic primitives Bugs fixed this month: - No major bugs fixed reported for this period. Business value: - Compliance and security posture improved via FIPS-aligned digest options and streamlined KMAC support. - Interoperability and key-management workflow for LMS-based PKI enhanced, reducing integration friction for LMS deployments. - Clearer code paths and commit traceability support faster audits and future maintenance.
September 2024
2 Commits • 2 Features
Sep 1, 2024Month: 2024-09 | Focus: core feature delivery in the openssl/openssl repository, with emphasis on cryptographic compliance, interoperability, and maintainability. Key features delivered: - FIPS provider cryptography enhancements: Introduced SHA256-192 as an internal digest option within the FIPS provider and reorganized the internal digest table to streamline handling of KMAC-related algorithms, improving cryptographic functionality and compliance. - LMS XDR public key decoder for OpenSSL: Added a decoder for LMS public keys in XDR format, including calculations of key sizes, decoding of public keys, and integration with the existing key management system. Impact and accomplishments: - Strengthened FIPS compliance and cryptographic functionality, enabling broader internal usage of SHA256-192 and more efficient digest handling for KMAC-related algorithms. - Improved interoperability with LMS-based PKI through XDR-decoded public keys and seamless integration with the key management infrastructure. - Delivered focused feature work with clean integration points into existing crypto and key management code paths, aiding future enhancements and audits. Technologies/skills demonstrated: - C, OpenSSL architecture, FIPS provider module design, and digest/KMAC handling - XDR decoding and integration with key management systems - Code organization and incremental refactoring for cryptographic primitives Bugs fixed this month: - No major bugs fixed reported for this period. Business value: - Compliance and security posture improved via FIPS-aligned digest options and streamlined KMAC support. - Interoperability and key-management workflow for LMS-based PKI enhanced, reducing integration friction for LMS deployments. - Clearer code paths and commit traceability support faster audits and future maintenance.
Activity
Loading activity data...
Quality Metrics
Correctness96.0%
Maintainability88.4%
Architecture91.0%
Performance86.6%
AI Usage20.8%
Skills & Technologies
Programming Languages
CJSONMarkdownPODPerlPodPythonTextYAMLpod
Technical Skills
API DesignAPI designASN.1 Encoding/DecodingAlgorithm ImplementationAlgorithm implementationAlgorithm optimizationBug FixingBug fixingBuild AutomationBuild SystemBuild System ConfigurationBuild SystemsC DevelopmentC ProgrammingC programming
Repositories Contributed To
Overview of all repositories you've contributed to across your timeline