jasmin-lang/jasmin
Oct 2024 – Jun 2025
5 Months active
Languages Used
OCamlMLShellEcMakefileMarkdownEYAML
Technical Skills
Code RefactoringCompiler DevelopmentModular DesignOCaml ProgrammingCode GenerationCode Organization
Gaëtan Cassiers
PROFILE
Gaëtan Cassiers
Gaetan Cassiers contributed to the jasmin-lang/jasmin repository by developing and refining core compiler features, focusing on modularity, leakage analysis, and proof automation. He enhanced the OCaml-based codebase by introducing modular design patterns, refactoring array and leakage extraction logic, and improving command-line tooling for flexible extraction workflows. Gaetan addressed memory management and documentation reliability, implementing fixes for environment handling and automating documentation builds. His work included formal verification and proof engineering, such as byte-array equality lemmas and simplification of proof obligations. These efforts improved maintainability, verification reliability, and user experience, demonstrating depth in compiler development and functional programming.
Overall Statistics
Feature vs Bugs
78%Features
Repository Contributions
17Total
Bugs
2
Commits
17
Features
7
Lines of code
4,376
Activity Months5
Your Network
24 people
Work History
June 2025
1 Commits
Jun 1, 2025June 2025 monthly summary for jasmin project (repo: jasmin-lang/jasmin). Focused on stabilizing documentation delivery by correcting the Read the Docs build path, enabling automatic doc builds and hosting. This reduces manual remediation, improves contributor onboarding, and enhances user-facing docs availability.
1 Commits
Jun 1, 2025June 2025 monthly summary for jasmin project (repo: jasmin-lang/jasmin). Focused on stabilizing documentation delivery by correcting the Read the Docs build path, enabling automatic doc builds and hosting. This reduces manual remediation, improves contributor onboarding, and enhances user-facing docs availability.
June 2025
February 2025
3 Commits • 2 Features
Feb 1, 2025February 2025 monthly summary for jasmin: Strengthened byte-array reasoning and streamlined compiler usage. Delivered JByte_array ext_eq lemma enabling element-wise equality proofs within bounds, plus simplifications of get_set' lemmas to reduce proof complexity. Deprecated the -I option for jasminc in favor of JASMINPATH, with warnings and changelog updates to lower configuration pitfalls. These changes improve verification reliability, reduce manual proof effort, and simplify developer/user workflows, delivering measurable business value through faster proofs and a smoother build process.
February 2025
3 Commits • 2 Features
Feb 1, 2025February 2025 monthly summary for jasmin: Strengthened byte-array reasoning and streamlined compiler usage. Delivered JByte_array ext_eq lemma enabling element-wise equality proofs within bounds, plus simplifications of get_set' lemmas to reduce proof complexity. Deprecated the -I option for jasminc in favor of JASMINPATH, with warnings and changelog updates to lower configuration pitfalls. These changes improve verification reliability, reduce manual proof effort, and simplify developer/user workflows, delivering measurable business value through faster proofs and a smoother build process.
December 2024
5 Commits • 1 Features
Dec 1, 2024December 2024 performance summary for jasmin-lang/jasmin. Delivered key updates to GIMLI leakage extraction and Jasmin2ec tooling, enabling broader leakage detection and new extraction capabilities; refactored internal environment and auxiliary variable management to prevent memory leaks; improved CI/Makefile compatibility for multiple cryptographic modes; updated proof files and changelog to reflect new extraction logic; deprecation of legacy options to streamline usage. These changes enhance security, reliability, and maintainability, and lay groundwork for future optimizations in leakage handling and compiler internals.
5 Commits • 1 Features
Dec 1, 2024December 2024 performance summary for jasmin-lang/jasmin. Delivered key updates to GIMLI leakage extraction and Jasmin2ec tooling, enabling broader leakage detection and new extraction capabilities; refactored internal environment and auxiliary variable management to prevent memory leaks; improved CI/Makefile compatibility for multiple cryptographic modes; updated proof files and changelog to reflect new extraction logic; deprecation of legacy options to streamline usage. These changes enhance security, reliability, and maintainability, and lay groundwork for future optimizations in leakage handling and compiler internals.
December 2024
November 2024
7 Commits • 3 Features
Nov 1, 2024Month: 2024-11 | jasmin-lang/jasmin Key features delivered: - CLI option added to select between the legacy anonymous function-based array representation and the new eclib function-based representation during extraction, enabling users to switch extraction models for performance vs accuracy. - Extraction test tooling updated to run with jasmin2ec (instead of deprecated jasminc), with updated architecture and output file arguments to match the new tool’s syntax. - Core toEC and Jasmin compiler improvements: architecture handling refactor, improved code generation for assignments and calls, modularized leakage extraction via functors, and AST reorganization in toEC.ml. Added ConstantTimeGlobal leakage model to support global leakage tracking. Major bugs fixed: - No specific bug IDs provided; changes collectively address stability and compatibility gaps introduced by older tooling and extraction paths, and fix leakage extraction flow through modularization. Overall impact and accomplishments: - Improved extraction accuracy and flexibility (choice of array representation), better tooling alignment (jasmin2ec), and a more maintainable, scalable compiler and leakage model framework. The work enables safer global leakage tracking and paves the way for easier extension of leakage models in future cycles. Technologies/skills demonstrated: - OCaml-based compiler and AST refactoring, functional programming with functors, architecture-aware code generation, leakage modeling (ConstantTimeGlobal), and modern test tooling integration.
November 2024
7 Commits • 3 Features
Nov 1, 2024Month: 2024-11 | jasmin-lang/jasmin Key features delivered: - CLI option added to select between the legacy anonymous function-based array representation and the new eclib function-based representation during extraction, enabling users to switch extraction models for performance vs accuracy. - Extraction test tooling updated to run with jasmin2ec (instead of deprecated jasminc), with updated architecture and output file arguments to match the new tool’s syntax. - Core toEC and Jasmin compiler improvements: architecture handling refactor, improved code generation for assignments and calls, modularized leakage extraction via functors, and AST reorganization in toEC.ml. Added ConstantTimeGlobal leakage model to support global leakage tracking. Major bugs fixed: - No specific bug IDs provided; changes collectively address stability and compatibility gaps introduced by older tooling and extraction paths, and fix leakage extraction flow through modularization. Overall impact and accomplishments: - Improved extraction accuracy and flexibility (choice of array representation), better tooling alignment (jasmin2ec), and a more maintainable, scalable compiler and leakage model framework. The work enables safer global leakage tracking and paves the way for easier extension of leakage models in future cycles. Technologies/skills demonstrated: - OCaml-based compiler and AST refactoring, functional programming with functors, architecture-aware code generation, leakage modeling (ConstantTimeGlobal), and modern test tooling integration.
October 2024
1 Commits • 1 Features
Oct 1, 2024Month 2024-10: Codebase modularity improvements for toEC.ml in jasmin. Completed a targeted refactor of toEC.ml to enhance modularity, introducing new modules and helper functions for array theories and expression formatting to improve maintainability and future extensibility. This work reduces surface complexity, facilitates testing, and lays the groundwork for future feature work in the jasmin codebase.
1 Commits • 1 Features
Oct 1, 2024Month 2024-10: Codebase modularity improvements for toEC.ml in jasmin. Completed a targeted refactor of toEC.ml to enhance modularity, introducing new modules and helper functions for array theories and expression formatting to improve maintainability and future extensibility. This work reduces surface complexity, facilitates testing, and lays the groundwork for future feature work in the jasmin codebase.
October 2024
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Quality Metrics
Correctness93.0%
Maintainability93.2%
Architecture92.0%
Performance83.0%
AI Usage20.0%
Skills & Technologies
Programming Languages
EEcMLMakefileMarkdownOCamlShellYAML
Technical Skills
Abstract AlgebraCI/CDCode GenerationCode OrganizationCode RefactoringCommand-Line InterfaceCommand-Line Interface DesignCompilerCompiler DevelopmentData StructuresDocumentationFormal VerificationFunctional ProgrammingMemory ManagementModular Design
Repositories Contributed To
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