LedgerHQ/ledger-secure-sdk
Apr 2025 – Oct 2025
7 Months active
Languages Used
CC++CMakeDockerfileGitMarkdownPythonShell
Technical Skills
Build SystemsC DevelopmentC++ DevelopmentCode FormattingBuild AutomationBuild System
Gustavo Jodar
PROFILE
Gustavo Jodar
Gustavo Jodar-Soares engineered and modernized the build, fuzzing, and automation infrastructure for the LedgerHQ/ledger-secure-sdk repository, focusing on reliability, maintainability, and developer experience. He refactored CMake and Makefile-based build systems, automated macro and mock generation, and integrated Docker-based fuzzing workflows to streamline security testing. Using C, Python, and shell scripting, Gustavo consolidated cross-device macro handling, standardized code formatting, and improved crash management and corpus onboarding for fuzzing. His work reduced build fragility, accelerated test cycles, and enhanced onboarding through improved documentation and automation, demonstrating depth in low-level programming, CI/CD, and embedded systems development within a complex codebase.
Overall Statistics
Feature vs Bugs
82%Features
Repository Contributions
84Total
Bugs
7
Commits
84
Features
31
Lines of code
14,091
Activity Months7
Your Network
146 people
Work History
October 2025
7 Commits • 2 Features
Oct 1, 2025October 2025 performance summary for LedgerHQ/ledger-secure-sdk: Delivered major fuzzing build system modernization, improved macro management, and onboarding documentation, driving faster, safer fuzzing cycles and easier SDK adoption. This work reduces build friction, improves maintainability, and strengthens security testing readiness.
7 Commits • 2 Features
Oct 1, 2025October 2025 performance summary for LedgerHQ/ledger-secure-sdk: Delivered major fuzzing build system modernization, improved macro management, and onboarding documentation, driving faster, safer fuzzing cycles and easier SDK adoption. This work reduces build friction, improves maintainability, and strengthens security testing readiness.
October 2025
September 2025
5 Commits • 2 Features
Sep 1, 2025September 2025 (LedgerHQ/ledger-secure-sdk) focused on modernizing the fuzzing infrastructure and improving build reliability. Key features delivered include a fuzzing pipeline refactor to derive build paths from ledger_app.toml using APP_GLYPH_DIR, standardizing glyph asset paths, and adding a robustness check to skip ledger-manifest when fuzzing an app; plus modernization of the fuzzing setup documentation for clearer directory structure and usability. These changes reduce configuration drift, cut unnecessary workload, and improve developer onboarding and test coverage, delivering measurable business value in faster, safer fuzz testing.
September 2025
5 Commits • 2 Features
Sep 1, 2025September 2025 (LedgerHQ/ledger-secure-sdk) focused on modernizing the fuzzing infrastructure and improving build reliability. Key features delivered include a fuzzing pipeline refactor to derive build paths from ledger_app.toml using APP_GLYPH_DIR, standardizing glyph asset paths, and adding a robustness check to skip ledger-manifest when fuzzing an app; plus modernization of the fuzzing setup documentation for clearer directory structure and usability. These changes reduce configuration drift, cut unnecessary workload, and improve developer onboarding and test coverage, delivering measurable business value in faster, safer fuzz testing.
August 2025
2 Commits • 1 Features
Aug 1, 2025August 2025 monthly summary for LedgerHQ/ledger-secure-sdk. Focused on strengthening fuzzing build tooling and maintainability. Delivered Fuzzing Build Tooling Improvements: consolidated and improved fuzzing build tooling by refactoring gen_mock.py to remove hardcoded header includes and clarify weak function attributes, and introduced a Makefile-based macro generation flow that dynamically extracts defines for target devices (e.g., stax and flex) to ensure correct macro generation. Commits: 38af33a767433666d73c987d1de6b4fc1c3953a8 (Remove header includes from gen_mock); dc7cfe08051b0f5c1323d9029dc72afdffd134a1 (generate macros using Makefile). No major bugs fixed this month; primary outcomes centered on tooling automation and build reliability. Overall impact: reduced build fragility, improved cross-device macro generation, and faster fuzzing iterations. Technologies/skills: C/C++, Python (gen_mock.py), Makefiles, fuzzing tooling, build automation, cross-device macros.
2 Commits • 1 Features
Aug 1, 2025August 2025 monthly summary for LedgerHQ/ledger-secure-sdk. Focused on strengthening fuzzing build tooling and maintainability. Delivered Fuzzing Build Tooling Improvements: consolidated and improved fuzzing build tooling by refactoring gen_mock.py to remove hardcoded header includes and clarify weak function attributes, and introduced a Makefile-based macro generation flow that dynamically extracts defines for target devices (e.g., stax and flex) to ensure correct macro generation. Commits: 38af33a767433666d73c987d1de6b4fc1c3953a8 (Remove header includes from gen_mock); dc7cfe08051b0f5c1323d9029dc72afdffd134a1 (generate macros using Makefile). No major bugs fixed this month; primary outcomes centered on tooling automation and build reliability. Overall impact: reduced build fragility, improved cross-device macro generation, and faster fuzzing iterations. Technologies/skills: C/C++, Python (gen_mock.py), Makefiles, fuzzing tooling, build automation, cross-device macros.
August 2025
July 2025
12 Commits • 4 Features
Jul 1, 2025July 2025 monthly summary for LedgerHQ/ledger-secure-sdk focusing on fuzzing workflow stabilization, build-system consistency, and tooling enhancements. Key deliverables drove reliability, faster iteration, and maintainability in fuzzing and CI workflows, with measurable business value in crash diagnosis, test coverage, and release readiness. Key features delivered: - Fuzzing workflow improvements and crash management: local_run.sh now robust in Docker, supports --run-crash, crash logs moved to a dedicated directory, graceful handling when no crashes occur, expanded initial corpus onboarding, updated docs, and improved readability. These changes accelerate fuzzing cycles and improve crash triage. - SDK build system naming standardization: Renamed INTERFACE library target from 'extra' to 'secure-sdk' to standardize naming and reduce ambiguity in the build graph. - Fuzzing tooling enhancements: Macros and mocks: moved gen_macros into the SDK, added extract_macros.py for macro extraction, and refactored mock generation script for clearer output and more robust handling; crash files redirected to out/harness/crashes to centralize artifacts. - NFC fuzzing components removal: Removed lib_nfc changes and associated harness to align with upcoming PRs and reduce noise in the fuzzing surface. - Documentation and readability improvements: Added comments to local_run.sh, updated docs, and documented initial corpus and harness changes to facilitate onboarding and maintenance. Major bugs fixed: - Crash logging: ensured crashes are consistently moved into the dedicated crash directory. - Local fuzzing run gating: local_run.sh correctly executes only inside Docker as intended, reducing environment-related failures. - Corpus integration: ensured initial corpus is properly added to clusterFuzz and the fuzzing harness, improving coverage from day one. Overall impact and accomplishments: - Increased fuzzing reliability and speed of feedback loops, enabling earlier detection of security issues and regressions. - Improved maintainability and consistency across the SDK build system and fuzzing tooling, reducing onboarding time for new engineers and simplifying PR reviews. - Strengthened testing capabilities by enabling deterministic crash handling, better logging, and richer corpus support. Technologies/skills demonstrated: - Docker-based fuzzing execution, crash management, and corpus handling. - Build system discipline and naming conventions for C/C++ targets. - Fuzzing tooling: macro generation, macro extraction tooling, and enhanced mock tooling. - Python scripting for tooling improvements (extract_macros.py) and improved automation. - Documentation practices and in-repo readability improvements.
July 2025
12 Commits • 4 Features
Jul 1, 2025July 2025 monthly summary for LedgerHQ/ledger-secure-sdk focusing on fuzzing workflow stabilization, build-system consistency, and tooling enhancements. Key deliverables drove reliability, faster iteration, and maintainability in fuzzing and CI workflows, with measurable business value in crash diagnosis, test coverage, and release readiness. Key features delivered: - Fuzzing workflow improvements and crash management: local_run.sh now robust in Docker, supports --run-crash, crash logs moved to a dedicated directory, graceful handling when no crashes occur, expanded initial corpus onboarding, updated docs, and improved readability. These changes accelerate fuzzing cycles and improve crash triage. - SDK build system naming standardization: Renamed INTERFACE library target from 'extra' to 'secure-sdk' to standardize naming and reduce ambiguity in the build graph. - Fuzzing tooling enhancements: Macros and mocks: moved gen_macros into the SDK, added extract_macros.py for macro extraction, and refactored mock generation script for clearer output and more robust handling; crash files redirected to out/harness/crashes to centralize artifacts. - NFC fuzzing components removal: Removed lib_nfc changes and associated harness to align with upcoming PRs and reduce noise in the fuzzing surface. - Documentation and readability improvements: Added comments to local_run.sh, updated docs, and documented initial corpus and harness changes to facilitate onboarding and maintenance. Major bugs fixed: - Crash logging: ensured crashes are consistently moved into the dedicated crash directory. - Local fuzzing run gating: local_run.sh correctly executes only inside Docker as intended, reducing environment-related failures. - Corpus integration: ensured initial corpus is properly added to clusterFuzz and the fuzzing harness, improving coverage from day one. Overall impact and accomplishments: - Increased fuzzing reliability and speed of feedback loops, enabling earlier detection of security issues and regressions. - Improved maintainability and consistency across the SDK build system and fuzzing tooling, reducing onboarding time for new engineers and simplifying PR reviews. - Strengthened testing capabilities by enabling deterministic crash handling, better logging, and richer corpus support. Technologies/skills demonstrated: - Docker-based fuzzing execution, crash management, and corpus handling. - Build system discipline and naming conventions for C/C++ targets. - Fuzzing tooling: macro generation, macro extraction tooling, and enhanced mock tooling. - Python scripting for tooling improvements (extract_macros.py) and improved automation. - Documentation practices and in-repo readability improvements.
June 2025
30 Commits • 13 Features
Jun 1, 2025June 2025 monthly summary for LedgerHQ/ledger-secure-sdk highlighting key features delivered, major bug fixes, and overall impact with focus on business value and technical achievements. Emphasizes reliability, reproducibility, and faster iteration across the build, fuzzing, and IO subsystems.
30 Commits • 13 Features
Jun 1, 2025June 2025 monthly summary for LedgerHQ/ledger-secure-sdk highlighting key features delivered, major bug fixes, and overall impact with focus on business value and technical achievements. Emphasizes reliability, reproducibility, and faster iteration across the build, fuzzing, and IO subsystems.
June 2025
May 2025
27 Commits • 8 Features
May 1, 2025May 2025 performance snapshot for LedgerHQ/ledger-secure-sdk: Key features delivered and major improvements focused on fuzzing, build system resilience, and code quality, enabling faster iteration, more robust security testing, and streamlined developer workflows. Key achievements and impact: - Fuzzing framework enhancements: Implemented mock generation tooling (mock_gen, generated_mocks) and a mock folder integration, with os.c support, expanding fuzz coverage and simplifying mock-based test scenarios. NFC fuzzing harness (fuzzer_nfc_ndef) added and wired into the CMake build for Apps, accompanied by README and local_run.sh to accelerate local validation. - Build system modernization: Reorganized project structure and fixed path issues in CMake for Apps, introduced macros and extra harness directories, and refined the libs/CMake integration. Updated gitignore to avoid fuzzing build output clutter, reducing noise and build failures. - Code quality uplift: Introduced clang-format and ShellCheck usage, cleaned up legacy code, and documented weak function ordering to improve maintainability and reduce future regressions. - New functionality and reliability improvements: Added CCID code in lib_io and simplified local_run script, together with targeted bug fixes (e.g., correct path to macros.txt, os_ndef_to_string stability). Business value: - Accelerated fuzz testing capability and test coverage for critical crypto and IO paths, reducing time-to-detect defects. - More reliable, maintainable build system across Apps and SDK components, decreasing integration friction. - Improved developer onboarding experience and fewer spurious build/test failures due to clearer code standards and automation. Technologies and skills demonstrated: - CMake-based build customization and project organization - Fuzzing framework integration (mock generation, harness wiring) - Shell scripting and tooling hygiene (ShellCheck, clang-format) - Code quality practices and maintainability (formatting, documentation, cleanup)
May 2025
27 Commits • 8 Features
May 1, 2025May 2025 performance snapshot for LedgerHQ/ledger-secure-sdk: Key features delivered and major improvements focused on fuzzing, build system resilience, and code quality, enabling faster iteration, more robust security testing, and streamlined developer workflows. Key achievements and impact: - Fuzzing framework enhancements: Implemented mock generation tooling (mock_gen, generated_mocks) and a mock folder integration, with os.c support, expanding fuzz coverage and simplifying mock-based test scenarios. NFC fuzzing harness (fuzzer_nfc_ndef) added and wired into the CMake build for Apps, accompanied by README and local_run.sh to accelerate local validation. - Build system modernization: Reorganized project structure and fixed path issues in CMake for Apps, introduced macros and extra harness directories, and refined the libs/CMake integration. Updated gitignore to avoid fuzzing build output clutter, reducing noise and build failures. - Code quality uplift: Introduced clang-format and ShellCheck usage, cleaned up legacy code, and documented weak function ordering to improve maintainability and reduce future regressions. - New functionality and reliability improvements: Added CCID code in lib_io and simplified local_run script, together with targeted bug fixes (e.g., correct path to macros.txt, os_ndef_to_string stability). Business value: - Accelerated fuzz testing capability and test coverage for critical crypto and IO paths, reducing time-to-detect defects. - More reliable, maintainable build system across Apps and SDK components, decreasing integration friction. - Improved developer onboarding experience and fewer spurious build/test failures due to clearer code standards and automation. Technologies and skills demonstrated: - CMake-based build customization and project organization - Fuzzing framework integration (mock generation, harness wiring) - Shell scripting and tooling hygiene (ShellCheck, clang-format) - Code quality practices and maintainability (formatting, documentation, cleanup)
April 2025
1 Commits • 1 Features
Apr 1, 2025Monthly summary for 2025-04 focusing on LedgerHQ/ledger-secure-sdk. Delivered a key feature around code formatting standardization and a build configuration refactor, with attention to consistency, automation, and CI readiness. No bug fixes reported this month.
1 Commits • 1 Features
Apr 1, 2025Monthly summary for 2025-04 focusing on LedgerHQ/ledger-secure-sdk. Delivered a key feature around code formatting standardization and a build configuration refactor, with attention to consistency, automation, and CI readiness. No bug fixes reported this month.
April 2025
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Quality Metrics
Correctness87.2%
Maintainability87.4%
Architecture83.4%
Performance77.8%
AI Usage21.0%
Skills & Technologies
Programming Languages
BashCC++CMakeDockerfileGitMakefileMarkdownPythonShell
Technical Skills
Build AutomationBuild SystemBuild System ConfigurationBuild SystemsBuild ToolsCC DevelopmentC ProgrammingC programmingC++ DevelopmentC/C++CI/CDCMakeCode DocumentationCode Formatting
Repositories Contributed To
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