OpenSSL::X509::StoreContext#verify

static VALUE
ossl_x509stctx_verify(VALUE self)
{
    X509_STORE_CTX *ctx;

    GetX509StCtx(self, ctx);
    VALUE cb = rb_iv_get(self, "@verify_callback");
    X509_STORE_CTX_set_ex_data(ctx, stctx_ex_verify_cb_idx, (void *)cb);
    RB_OBJ_WRITTEN(self, Qundef, cb);

    switch (X509_verify_cert(ctx)) {
      case 1:
        return Qtrue;
      case 0:
        ossl_clear_error();
        return Qfalse;
      default:
        ossl_raise(eX509StoreError, "X509_verify_cert");
    }
}