read

static VALUE
ossl_pkey_new_from_data(int argc, VALUE *argv, VALUE self)
{
     EVP_PKEY *pkey;
     BIO *bio;
     VALUE data, pass;
     char *passwd = NULL;

     rb_scan_args(argc, argv, "11", &data, &pass);

     bio = ossl_obj2bio(data);
     if (!(pkey = d2i_PrivateKey_bio(bio, NULL))) {
        OSSL_BIO_reset(bio);
        if (!NIL_P(pass)) {
            passwd = StringValuePtr(pass);
        }
        if (!(pkey = PEM_read_bio_PrivateKey(bio, NULL, ossl_pem_passwd_cb, passwd))) {
            OSSL_BIO_reset(bio);
            if (!(pkey = d2i_PUBKEY_bio(bio, NULL))) {
                OSSL_BIO_reset(bio);
                if (!NIL_P(pass)) {
                    passwd = StringValuePtr(pass);
                }
                pkey = PEM_read_bio_PUBKEY(bio, NULL, ossl_pem_passwd_cb, passwd);
            }
        }
    }

    BIO_free(bio);
    if (!pkey)
        ossl_raise(rb_eArgError, "Could not parse PKey");
    return ossl_pkey_new(pkey);
}