OpenSSL::X509::Attribute.new

static VALUE
ossl_x509attr_initialize(int argc, VALUE *argv, VALUE self)
{
    VALUE oid, value;
    X509_ATTRIBUTE *attr;
    const unsigned char *p;

    rb_scan_args(argc, argv, "11", &oid, &value);
    ossl_want_uninitialized(self, &ossl_x509attr_type);
    if (argc == 1) {
        oid = ossl_to_der_if_possible(oid);
        StringValue(oid);
        p = (unsigned char *)RSTRING_PTR(oid);
        attr = d2i_X509_ATTRIBUTE(NULL, &p, rb_len2long(RSTRING_LEN(oid)));
        if (!attr)
            ossl_raise(eX509AttrError, "d2i_X509_ATTRIBUTE");
        RTYPEDDATA_DATA(self) = attr;
        return self;
    }

    attr = X509_ATTRIBUTE_new();
    if (!attr)
        ossl_raise(eX509AttrError, "X509_ATTRIBUTE_new");
    RTYPEDDATA_DATA(self) = attr;

    rb_funcall(self, rb_intern("oid="), 1, oid);
    rb_funcall(self, rb_intern("value="), 1, value);

    return self;
}