Fields
rsa_pkcs1_sha256 = 1025,
rsa_pkcs1_sha384 = 1281,
rsa_pkcs1_sha512 = 1537,
ecdsa_secp256r1_sha256 = 1027,
ecdsa_secp384r1_sha384 = 1283,
ecdsa_secp521r1_sha512 = 1539,
rsa_pss_rsae_sha256 = 2052,
rsa_pss_rsae_sha384 = 2053,
rsa_pss_rsae_sha512 = 2054,
ed25519 = 2055,
ed448 = 2056,
rsa_pss_pss_sha256 = 2057,
rsa_pss_pss_sha384 = 2058,
rsa_pss_pss_sha512 = 2059,
rsa_pkcs1_sha1 = 513,
ecdsa_sha1 = 515,