From Fedora Project Wiki
The following ECC curves are currently permitted in Fedora:
| Curve | Description |
|---|---|
| Curve 448 | 224 bit curve designed for use with the elliptic curve Diffie–Hellman (ECDH) key agreement scheme |
| Curve 25519 | 128 bit curve designed for use with the elliptic curve Diffie–Hellman (ECDH) key agreement scheme |
| secp224r1 | NIST/SECG curve over a 224 bit prime field |
| secp256k1 | SECG curve over a 256 bit prime field |
| secp256r1/prime256v1 | X9.62/SECG curve over a 256 bit prime field |
| secp384r1 | NIST/SECG curve over a 384 bit prime field |
| secp521r1 | NIST/SECG curve over a 521 bit prime field |