OpenSSL::PKCS7.new

static VALUE
ossl_pkcs7_initialize(int argc, VALUE *argv, VALUE self)
{
    PKCS7 *p7, *p7_orig = RTYPEDDATA_DATA(self);
    BIO *in;
    VALUE arg;

    if(rb_scan_args(argc, argv, "01", &arg) == 0)
        return self;
    arg = ossl_to_der_if_possible(arg);
    in = ossl_obj2bio(&arg);
    p7 = d2i_PKCS7_bio(in, NULL);
    if (!p7) {
        OSSL_BIO_reset(in);
        p7 = PEM_read_bio_PKCS7(in, NULL, NULL, NULL);
    }
    BIO_free(in);
    if (!p7)
        ossl_raise(rb_eArgError, "Could not parse the PKCS7");

    RTYPEDDATA_DATA(self) = p7;
    PKCS7_free(p7_orig);
    ossl_pkcs7_set_data(self, Qnil);
    ossl_pkcs7_set_err_string(self, Qnil);

    return self;
}