bp512

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, provenance, and a known packaging caveat before you depend on this.