question about certificate verify

[forston_shi at trendmicro.com]

Hi Openssl team,
I have a question about certificate verify.

We check a sub-certificate with a lot of root certificates.
We don't want to check sub-certificate's expire time, but we want to get an error when root certificate expired.

I try to verify it by following option,
  X509_VERIFY_PARAM* pm = X509_STORE_CTX_get0_param(xstore_ctx);
  X509_VERIFY_PARAM_set_flags(pm, X509_V_FLAG_NO_CHECK_TIME);

  iret = X509_verify_cert(xstore_ctx);

But it also will ignore root certificate's expire.

So, can you give me some suggestion for my question.

Best regards
Forston Shi (RD-CN)


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