bp512-nestler

The first published pure-Rust implementation of BrainpoolP512r1 (RFC 5639 §3.7) — no other crate on crates.io implements this curve as of 2026-09. Built on the same elliptic-curve/primefield/primeorder machinery RustCrypto's own bp384 crate uses; domain parameters cross-verified against RFC 5639 and OpenSSL, and checked against an independent ECDH oracle. See README for scope and provenance. Note: RustCrypto has an official BrainpoolP512r1 implementation in draft (github.com/RustCrypto/elliptic-curves#1914) — this crate is named -nestler to leave the plain `bp512` name free for that when it ships.