March 2026 monthly summary for openssl/openssl: Delivered a critical memory-safety fix for the base64 encoding path and completed targeted code changes to support large-encoded outputs. The work hardened the encoding path by addressing integer overflow in EVP_ENCODE_LENGTH and related functions, refactoring length types to size_t, adding explicit overflow checks, and aligning return types across the encoding routines. The patch includes updates to EVP_EncodeUpdate, EVP_EncodeBlock, and EVP_EncodeFinal, and was reviewed by Saša Nedvědický and Tomas Mraz, merging from PR #30321. Impact: prevents buffer under-allocation and potential memory corruption for large inputs, improving reliability of TLS and crypto operations, with no observed performance regressions. Technologies demonstrated: C, manual overflow-safe arithmetic, type safety with size_t, code review best practices, and OpenSSL internal API familiarity.