Does SharePoint provides all the features related to user access permission like view,edit, delete, download document?

Question

I want to use SharePoint for Document Sharing. I want all these features :

1. User access permission settings.
2. User can download Sub document but not main document.
3. One document can contain links for sub documents so I need different permissions for all those sub documents as well.
4. Different permissions for view,modify, delete and download document for main document as well as sub documents.
5. Different access rights to admin for uploading documents.

Answer 1

I would need more information on your environment and requirements but the answer for your question in short is you would need Information Rights Management. This granularity of permissions is not supported by SharePoint based on your comment.