LedgerHQ/ledger-secure-sdk
May 2025 – Jun 2025
2 Months active
Languages Used
C
Technical Skills
Embedded CLow-level ProgrammingNFCC ProgrammingDevice DriversDriver Development
Francisco Freitas
PROFILE
Francisco Freitas
Francisco Freitas contributed to the LedgerHQ/ledger-secure-sdk repository by focusing on reliability, maintainability, and security in embedded systems. He refactored NFC protocol buffer naming to clarify context and improve code readability without altering behavior, supporting safer future development. In subsequent work, Francisco enhanced USB, CCID, and U2F transport layers by introducing fuzzing-ready IO receive retries, robust input validation, and memory-safety checks. Using C and Embedded C, he addressed potential buffer overflows, null pointer dereferences, and integer underflows, reducing crash risk and improving device integration. His disciplined, low-level programming approach resulted in safer, more maintainable code for hardware security applications.
Overall Statistics
Feature vs Bugs
33%Features
Repository Contributions
7Total
Bugs
4
Commits
7
Features
2
Lines of code
60
Activity Months2
Your Network
146 people
Work History
June 2025
6 Commits • 1 Features
Jun 1, 2025LedgerHQ/ledger-secure-sdk — June 2025 monthly summary: Delivered core reliability and safety improvements across USB, CCID, and U2F transports, complemented by fuzzing support enhancements. Implemented a fuzzing-ready IO receive retry mechanism (max 5 retries) to improve reliability of command reception during fuzz testing. Hardened critical transport paths with stronger input validation and memory-safety checks. These changes reduce crash risk, memory corruption, and exposure to malformed inputs while enabling safer fuzz-testing workflows. Overall impact includes improved stability for device naming, descriptor generation, and protocol handling, contributing to a stronger security posture and faster iteration cycles for hardware integration. Highlights demonstrate strong defensive programming, traceability, and practical business value from safer code and resilient transport layers.
6 Commits • 1 Features
Jun 1, 2025LedgerHQ/ledger-secure-sdk — June 2025 monthly summary: Delivered core reliability and safety improvements across USB, CCID, and U2F transports, complemented by fuzzing support enhancements. Implemented a fuzzing-ready IO receive retry mechanism (max 5 retries) to improve reliability of command reception during fuzz testing. Hardened critical transport paths with stronger input validation and memory-safety checks. These changes reduce crash risk, memory corruption, and exposure to malformed inputs while enabling safer fuzz-testing workflows. Overall impact includes improved stability for device naming, descriptor generation, and protocol handling, contributing to a stronger security posture and faster iteration cycles for hardware integration. Highlights demonstrate strong defensive programming, traceability, and practical business value from safer code and resilient transport layers.
June 2025
May 2025
1 Commits • 1 Features
May 1, 2025May 2025 monthly summary for LedgerHQ/ledger-secure-sdk: Focus on readability-focused refactor in NFC path with zero behavioral change. Key feature delivered: rename NFC protocol chunk buffer from ledger_protocol_chunk_buffer to nfc_ledger_protocol_chunk_buffer for clarity in the NFC ledger context. Major bug fix: explicit naming of NFC protocol chunk buffer (commit 1ccb0e74148274e909f0fd95324df1836811d5bb). Overall impact: improved code readability and maintainability in NFC-related code, enabling safer future refactors and easier onboarding. Technologies/skills demonstrated: precise refactoring, naming conventions, NFC context awareness, disciplined commit hygiene, and risk-free changes.
May 2025
1 Commits • 1 Features
May 1, 2025May 2025 monthly summary for LedgerHQ/ledger-secure-sdk: Focus on readability-focused refactor in NFC path with zero behavioral change. Key feature delivered: rename NFC protocol chunk buffer from ledger_protocol_chunk_buffer to nfc_ledger_protocol_chunk_buffer for clarity in the NFC ledger context. Major bug fix: explicit naming of NFC protocol chunk buffer (commit 1ccb0e74148274e909f0fd95324df1836811d5bb). Overall impact: improved code readability and maintainability in NFC-related code, enabling safer future refactors and easier onboarding. Technologies/skills demonstrated: precise refactoring, naming conventions, NFC context awareness, disciplined commit hygiene, and risk-free changes.
Activity
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Quality Metrics
Correctness90.0%
Maintainability85.8%
Architecture82.8%
Performance82.8%
AI Usage20.0%
Skills & Technologies
Programming Languages
C
Technical Skills
C ProgrammingDevice DriversDriver DevelopmentEmbedded CEmbedded SystemsFuzzingLow-Level ProgrammingLow-level ProgrammingMemory ManagementNFCSecurityUSB
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