X509_STORE_add_cert increments the reference count of the each cert, but only by 1. X509_STORE_free decrements the ref count by 1. So after decrementing, if ref_count is 0, certificate will be freed. Jakob is saying that if you want them to stay even after X509_STORE_free, explicitly increment the ref count before calling free using something like below. CRYPTO_add(certificate->references, 1, CRYPTO_LOCK_X509); decrypt the ref count when you really want to free them and call X509_free(certificate). On 10 June 2015 at 10:20, Nayna Jain <naynjain at in.ibm.com> wrote: > Thanks Jacob, > So, does that API do not increment reference count internally itself. > > I mean if I have to explicitly do that, what is the API for that ? > > Thanks & Regards, > Nayna Jain > > [image: Inactive hide details for Jakob Bohm ---06/10/2015 09:49:54 > AM---On 10/06/2015 05:22, Nayna Jain wrote: >]Jakob Bohm ---06/10/2015 > 09:49:54 AM---On 10/06/2015 05:22, Nayna Jain wrote: > > > From: Jakob Bohm <jb-openssl at wisemo.com> > To: openssl-users at openssl.org > Date: 06/10/2015 09:49 AM > Subject: Re: [openssl-users] X509_STORE_free() and X509_LOOKUP_free() > also frees the X509 certificates inside it > Sent by: "openssl-users" <openssl-users-bounces at openssl.org> > ------------------------------ > > > > > On 10/06/2015 05:22, Nayna Jain wrote: > > > Hi all, > > I am using X509_STORE and X509_LOOKUP to verify the certificate and > its chain. > > But at the end when I do X509_STORE_free(store) and > X509_LOOKUP_free(lookup), it is also doing free of the X509* certificate > which I added. > But I don't want that, because after that when I immediately try to > access X509* certificate for further operation, then it results in core dump > > And if I don't do X509_STORE_free() then it will leave the memory leak. > > Let me know how to resolve this and if I misunderstood something. > > > X509 objects (and many other objects in the API) are > reference counted. > > Increment the reference count of each certificate as > you add it to the X509_STORE, this should make the > X509 object stay around after X509_STORE_free() frees > it. > > However there is a shortage of documentation on the > reference counting functions involved. > > Enjoy > > Jakob > -- > Jakob Bohm, CIO, Partner, WiseMo A/S. *http://www.wisemo.com* > <http://www.wisemo.com/> > > Transformervej 29, 2860 S?borg, Denmark. Direct +45 31 13 16 10 > This public discussion message is non-binding and may contain errors. > WiseMo - Remote Service Management for PCs, Phones and Embedded > _______________________________________________ > openssl-users mailing list > To unsubscribe: https://mta.openssl.org/mailman/listinfo/openssl-users > > > _______________________________________________ > openssl-users mailing list > To unsubscribe: https://mta.openssl.org/mailman/listinfo/openssl-users > > -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://mta.openssl.org/pipermail/openssl-users/attachments/20150610/c0c30c11/attachment.html> -------------- next part -------------- A non-text attachment was scrubbed... Name: graycol.gif Type: image/gif Size: 105 bytes Desc: not available URL: <http://mta.openssl.org/pipermail/openssl-users/attachments/20150610/c0c30c11/attachment.gif>
