verify

static VALUE
ossl_pkcs7_verify(int argc, VALUE *argv, VALUE self)
{
    VALUE certs, store, indata, flags;
    STACK_OF(X509) *x509s;
    X509_STORE *x509st;
    int flg, ok, status = 0;
    BIO *in, *out;
    PKCS7 *p7;
    VALUE data;
    const char *msg;

    rb_scan_args(argc, argv, "22", &certs, &store, &indata, &flags);
    flg = NIL_P(flags) ? 0 : NUM2INT(flags);
    if(NIL_P(indata)) indata = ossl_pkcs7_get_data(self);
    in = NIL_P(indata) ? NULL : ossl_obj2bio(indata);
    if(NIL_P(certs)) x509s = NULL;
    else{
        x509s = ossl_protect_x509_ary2sk(certs, &status);
        if(status){
            BIO_free(in);
            rb_jump_tag(status);
        }
    }
    x509st = GetX509StorePtr(store);
    GetPKCS7(self, p7);
    if(!(out = BIO_new(BIO_s_mem()))){
        BIO_free(in);
        sk_X509_pop_free(x509s, X509_free);
        ossl_raise(ePKCS7Error, NULL);
    }
    ok = PKCS7_verify(p7, x509s, x509st, in, out, flg);
    BIO_free(in);
    if (ok < 0) ossl_raise(ePKCS7Error, NULL);
    msg = ERR_reason_error_string(ERR_get_error());
    ossl_pkcs7_set_err_string(self, msg ? rb_str_new2(msg) : Qnil);
    ERR_clear_error();
    data = ossl_membio2str(out);
    ossl_pkcs7_set_data(self, data);
    sk_X509_pop_free(x509s, X509_free);

    return (ok == 1) ? Qtrue : Qfalse;
}