On Tue, Apr 03, 2012, Naveen Nathan wrote:

> > > > That's because the ASN1_OBJECT is a little different. Some standard 
> > > > OIDs are
> > > > set to a fixed value to avoid the need to keep allocating them. What 
> > > > that
> > > > means in practice is you do something like:
> > > > 
> > > > foo->usage = OBJ_something(somearg);
> > > > 
> > > > This wont result in a memory leak because the OID isn't dynamically 
> > > > allocated.
> > > 
> > > I would also be using custom OIDs. Would I need to first register the OIDs
> > > using OBJ_create? Normally we don't use any name identifier. Or is there
> > > a way to duplicate an ASN1_OBJECT?
> > > 
> > > Otherwise I can probably write an auxillary function to handle this in
> > > a similar vein to OBJ_dup(ASN1_OBJECT *).
> > > 
> > 
> > You can use OBJ_txt2obj to created an ASN1_OBJECT from the numerical form if
> > you wish. OBJ_dup will duplicate an ASN1_OBJECT just fine.
> 
> Thanks, but perhaps I am a little unclear about the issue I'm having.
> 
> I have written the following code to demonstrate the issue I'm having,
> specifically with ASN1_OBJECT in a custom ASN1 struct containing only
> one ASN1_OBJECT type.
> 
> I just have a basic ASN1 sequence containing an ASN1_OBJECT. I want
> to assign the custom OID "1.2.3.4" to obj. When I try to do this with
> OBJ_txt2obj(), this becomes the cause for a segfault on i2d_basic().
> 
> I'm unsure why this segfault occurs. My guess is obj is already
> allocated by simple_asn_new(); therefore reassigning it with
> a newly created object from OBJ_txt2obj() causes a segfault.
> But I'm not too familiar with the internals of the i2d_* routine
> to see how this is possible.
> 

What OS are you running this on?

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