Curve,ECDH Point Format,ECDH Secret Key MPI,EdDSA Secret Key MPI,EdDSA Signature first MPI,EdDSA Signature second MPI,Reference
NIST P-256,SEC1,integer,N/A,N/A,N/A,[RFC9580]
NIST P-384,SEC1,integer,N/A,N/A,N/A,[RFC9580]
NIST P-521,SEC1,integer,N/A,N/A,N/A,[RFC9580]
brainpoolP256r1,SEC1,integer,N/A,N/A,N/A,[RFC9580]
brainpoolP384r1,SEC1,integer,N/A,N/A,N/A,[RFC9580]
brainpoolP512r1,SEC1,integer,N/A,N/A,N/A,[RFC9580]
Ed25519Legacy,N/A,N/A,32 octets of secret,32 octets of R,32 octets of S,[RFC9580]
Curve25519Legacy,prefixed native,"integer [RFC9580, Section 5.5.5.6.1.1]",N/A,N/A,N/A,[RFC9580]