That actually worked reasonably smoothly, the only thing that I have to fix now 
is that it's obviously taking the time zone into account - is there a way of 
telling it to do everything in UTC?

And I still don't see any programmatic way of accessing whether a key usage is 
"critical" or not.

Thanks  .... N


Nou Dadoun
Senior Firmware Developer, Security Specialist


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-----Original Message-----
From: openssl-users [mailto:openssl-users-boun...@openssl.org] On Behalf Of Dr. 
Stephen Henson
Sent: Monday, January 18, 2016 2:51 PM
To: openssl-users@openssl.org
Subject: Re: [openssl-users] How to access some simple conversion functions - 
asn1_time_to_tm

On Mon, Jan 18, 2016, Nounou Dadoun wrote:

> Hi folks,
> 
> I'm trying to do some simple conversions (I need to push some certificate 
> data across a soap interface).
> 
> I'm trying to do an ASN1 time conversion to tm (and eventually time_t but tm 
> would be fine).
> 

The equivalent of time_t is easier. If you use the function ASN1_TIME_diff you 
can find the difference in days and seconds between two ASN1_TIME structures so 
if you set one to the epoch you can then convert the result to time_t.
You have to be careful the result doesn't overflow the local time_t.

Steve.
--
Dr Stephen N. Henson. OpenSSL project core developer.
Commercial tech support now available see: http://www.openssl.org 
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