Worked on enhancing digest algorithm handling in the openssl/openssl repository, focusing on integrating provider-based retrieval for cryptographic workflows. Refactored the codebase to use EVP_MD_fetch instead of EVP_get_digestbynid, enabling more robust and provider-aware lookup of digest algorithms by object and short name. This improvement streamlined ASN.1 verification and CMS signing processes, increasing compatibility with the evolving OpenSSL provider architecture. The work involved C programming and algorithm design, with an emphasis on cryptography and software development best practices. Collaboration was demonstrated through code reviews and merged pull requests, contributing to the maintainability and extensibility of the cryptographic library.