On Thu, Apr 02, 2009, Randy Turner wrote:

>
> Hello list,
>
> Are the ASN.1 functions in OpenSSL "generic" enough to be used for other 
> purposes besides reading/writing certificates?
>

Yes.

> I was curious if the ASN.1 code could encode/decode both BER and DER, 
> generically, even if the source of the data is NOT associated with 
> certificates.  For instance, can these routines be used to encode/decode a 
> CMS container.  Since CMS is pretty close to PKCS#7, my assumption would be 
> "yes".  But taken to another extreme, could I use the ASN.1 library in 
> OpenSSL to encode/decode Kerberos traffic, or SNMP traffic (BER), or other 
> protocols encoded in BER/DER?
>
> Just curious how "reusable" the OpenSSL ASN.1 was, and if it's not "quite" 
> as reusable as I am thinking about, is there a generic library available? 
> I've tried using "asn1c", but this code seems to break when I feed it valid 
> BER...
>

OpenSSL supports CMS already. It should always decode BER correctly. DER is
output in most cases. The one exception is streaming encode currently used for
CMS and PKCS#7 in 1.0.0-beta and later only.

Steve.
--
Dr Stephen N. Henson. Email, S/MIME and PGP keys: see homepage
OpenSSL project core developer and freelance consultant.
Homepage: http://www.drh-consultancy.demon.co.uk
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