OPENSSL_KEYTYPE_RSA
     (int)
    OPENSSL_KEYTYPE_DSA
     (int)
    OPENSSL_KEYTYPE_DH
     (int)
    OPENSSL_KEYTYPE_EC
     (int)
    OPENSSL_KEYTYPE_X25519
     (int)
    OPENSSL_KEYTYPE_ED25519
     (int)
    OPENSSL_KEYTYPE_X448
     (int)
    OPENSSL_KEYTYPE_ED448
     (int)
    