* Split ecdsa_curve into curve_info and ecdsa_curve to support bip32 on curves that don't have a ecdsa_curve. * Don't fail in key derivation but retry with a new hash. * Adapted test case accordingly
Every curve gets it's own hierarchy and the curve is remembered in HD node. Fixed the private/public key derivations to use the right modulus.
This enables SSH ECDSA public key authentication.
