Add other signed attributes in CMS

[Jamil Nimeh]

Hello all,

I was wondering if folks know the best way to add additional signed
attributes to CMS signed data messages. I see in cms.h there's a
NSS_CMSSignerInfo_AddAutiAttr function, but it doesn't appear to be
exported (at least, I get undefined reference errors when I try to use it).

I'm trying to add signed attributes for SCEP messages (like sender and
recipient nonces, transaction IDs, etc.).

Any suggestions on the best way to accomplish this?

Thank you,
Jamil