Re: Problem with Subject directory attributes

Hi Nikola,

You can use the subject directory attributes class from bouncy castle 
and add attributes as follows:

ASN1EncodableVector dirName = new ASN1EncodableVector();
//dirName.add(asn1-of-the-attribute-value)
DERSet valueSet = new DERSet(dirName);
Attribute attr = new Attribute(new ASN1ObjectIdentifier(oid, valueSet); 

attributes.add(attr);   //add as many attributes to it
SubjectDirectoryAttributes subjectDirAttr = new 
SubjectDirectoryAttributes(attributes);

I hope this helps.

- Gurmeen




On 14/06/2019 22:52, Nikola Milenic wrote:
> Hello everyone,
> 
> I am trying to use Bouncy Castle to work with X509 Certificates. So far 
> I have ran into quite a few problems, but have always managed to solve 
> them with the help of various tutorials and example codes. However, now 
> I need to add Subject directory attributes extension to the certificate, 
> and I am unable to find any example code, documentation, or other 
> resource that would help me understand how to do that. I am able to add 
> common extensions, such as key usage, but this one in particular is 
> troublesome. I have no idea how to instantiate 
> SubjectDirectoryAttributes class or how to create Attributes or the 
> ASN1Sequence that it requires. I have date of birth, place of birth, 
> country of citizenship and gender stored in variables as standard 
> non-bouncycastle datatypes, and I need to put them into a Subject 
> directory attributes extension.  Any help would be greatly appreciated.
> 
> Thanks in advance,
> Nikola Milenić