Re: how to set flags in X509_NAME_ENTRY in OpenSSL 1.1.1

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If you look here:
https://www.openssl.org/docs/man1.1.0/man3/X509_NAME_ENTRY_get_data.html
It states:
X509_NAME_ENTRY_get_data() retrieves the field value of ne in and ASN1_STRING structure.

Unfortunately this does not work for any non-string X.500 attributes such as x500UniqueIdentifer which is defined as an ASN.1 BIT STRING.

I am only looking to fix in OpenSSL 1.1.1, what was previously working in all older versions of OpenSSL all the way back to 0.9.7 which included a way to support non-string attributes in X509_NAME_ENTRY.

Thanks.

Lisa.



On Mon, 17 Jun 2019 at 22:37, Viktor Dukhovni <openssl-users@xxxxxxxxxxxx> wrote:
On Mon, Jun 17, 2019 at 09:19:41PM -0700, Lisa Matias wrote:

> X509_NAME_ENTRY *nameEntry;
> nameEntry = X509_NAME_ENTRY_create_by_NID (&nameEntry, nid,
>                         derTagToVType (tag), buffer, bufferLength);
> *nameEntry->value->flags = specifiedFlags;*

Can you be a bit more explicit about why you need to do this?
What flags do you intend to set and why?

That said, you can use:

    ASN1_STRING *X509_NAME_ENTRY_get_data(const X509_NAME_ENTRY *ne);

to get the ASN1_STRING holding the value, and since ASN1_STRINGs
are not opaque types, you can just use:

        value->flags = ...

asuming that's a sensible thing to do.  You may however be straying
into undocumented behaviour, and so it might be good to know whether
perhaps there's a better way of getting the result you actually want.

--
        Viktor.

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