May 2025 monthly summary for curl/curl focusing on delivering business value and technical achievements related to Encrypted Client Hello (ECH) support.

April 2025: Delivered a DoH HTTPSRR bug fix and introduced basic ECH tests for curl/curl, improving reliability and interoperability in DoH workflows. Key outcomes include corrected HTTPSRR processing, updated tests reflecting changes in the target host, and foundational ECH test coverage validating GREASE handling and real ECH extensions in client-server interactions. These efforts reduce production risk in DoH-heavy deployments and demonstrate proficiency in DoH/ECH technologies, test automation, and collaboration on curl.

January 2025: Delivered API-aligned ECH enhancements and robust parameter parsing for curl/curl. Key achievements include updating curl's ECH APIs to align with OpenSSL maintainers' agreements, extending ECH support in the library, and fixing a regression in ECH parameter parsing in tool_getparam, improving handling of various argument formats. These changes enhance interoperability with OpenSSL, reduce risk of ECH-related regressions, and improve user experience for encrypted client hello scenarios. Technical work spanned API updates, regression debugging, and code hygiene for ECH-related components, with a focus on stability and maintainability across the repository curl/curl.

Month: 2024-11 – Security-focused memory-safety and reliability improvements in the openssl/openssl repo. Delivered a targeted bug fix addressing a potential buffer overflow by constraining the OPENSSL_MALLOC_FAILURES environment variable to 256 characters using a static buffer, replacing a dynamic allocation. The change reduces risk of memory corruption in production and is complemented by updated documentation.