static int old_rsa_priv_decode(EVP_PKEY *pkey,
                               const unsigned char **pder, int derlen)
{
    RSA *rsa;
    if (!(rsa = d2i_RSAPrivateKey(NULL, pder, derlen))) {
        RSAerr(RSA_F_OLD_RSA_PRIV_DECODE, ERR_R_RSA_LIB);
        return 0;
    }
    EVP_PKEY_assign_RSA(pkey, rsa);
    return 1;
}

Unknown