gnutls_x509_crt_get_expiration_time problem on window

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Hi all,
first of all: many thanks, gnutls is a precious work. .
I'm using the 2.7.3 library with Microsoft Visual C++ 2008 Express. I have build on my own a server application and a client application using some code snippets from the examples programs included in the installation pack. Everything is fine but I am not able to print the activation/expiration time of my client certificate (I have created it using the certtol utility).

 

If I run certtool to view the client certificate information I can see them.

 

Here is my code:
...
  expiration_time = gnutls_x509_crt_get_expiration_time(cert);
  activation_time = gnutls_x509_crt_get_activation_time(cert);
...

 

  Form1.display.Append("\tCertificate is valid since: "+xstring( ctime(&activation_time))+"\n");
  Form1.display.Append("\tCertificate expires: "+xstring( ctime(&expiration_time))+"\n");
...

 

It seems like those functions return strange values rather good or bad (-1 ) values

 

 

Pietro Fabrizio

 

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