NFD

NDN Certification Framework (ndncert)

=======

## Prerequisites:

- ndn-cxx, NFD

        sudo apt-get install ndn-cxx ndn-cxx-dev nfd

- repo-ng with proper config

    Repo will hold/serve issued certificates for the site:

        sudo apt-get install repo-ng

    Make sure that repo's config (`/etc/ndn/repo-ng.conf`) looks like the following (only repo.data needs to be changed, the rest should be the same).

        repo

        {

          data

          {

            prefix "ndn:/ndn/edu/ucla/KEY"

            ; prefix "ndn:/ndn/<site-name>/KEY"

          }

          command

          {

            prefix "ndn:/localhost/repo-ng"

          }

          storage

          {

            method "sqlite"             ; Currently, only sqlite storage engine is supported

            path "/var/lib/ndn/repo-ng"  ; path to repo-ng storage folder

            max-packets 1000000

          }

          tcp_bulk_insert {

            host "localhost"  ; Set to listen on different IP address or hostname

            port 7376  ; Set to listen on different port number

          }

          validator

          {

            trust-anchor {

                type any

            }

          }

        }

    Restart repo-ng after making changes to config file (or the system)

        sudo restart repo-ng

- Installed custom fork of PyNDN2 (! using python 2.7)

        git clone https://github.com/cawka/PyNDN2

        cd PyNDN2

        sudo python setup.py install

- ndnop-process-requests script installed somewhere in security operator's PATH

        sudo curl -L https://raw.githubusercontent.com/named-data/ndncert/master/ndnop-process-requests > /usr/local/bin/ndnop-process-requests

        sudo chmod +x /usr/local/bin/ndnop-process-requests

## Certificate generation

"Ideally", the procedure has to be done by the designated security operator himself. 

Performing this procedure on testbed hub is just a "convenience" for the time being and at all signing "ideally" should be performed elsewhere.

NOTE: The following commands must be performed under a designated `ndncert` user.

If ssh logic is different, `sudo su - ndncert` must be used to switch to the account (! not just `sudo ndncert`).

### Automated using ndncert

1. Go to http://ndncert.named-data.net

2. Enter `<site-name>@operators.named-data.net` as email.  For example:

    /ndn/edu/university@operators.named-data.net

3. Proceed to certificate request upload page (email verification is disabled for `operators.named-data.net`

4. Install certificate using the command received from the NDN testbed root operator:

    ndnsec-install-cert <received-URL>

### Manually

1. Generate key pair and certification request:

        ndnsec-keygen /ndn/edu/<name>

    `<name>` is sometime like: wustl, colostate, umich, ...

    The output of this command is certification request.  If signing request needs to be recreated for the existing identity (one from the `ndnsec-ls-identity` list), the following command can be used:

        ndnsec-sign-req /ndn/edu/<name>

    Singing request should be sent to NDN trust root (Alex Afanasyev right now). 

2. Root operator will return signed certificate (e.g., `umich.ndncert`).  Do the following with the file:

        ndnsec-install-cert <received-file>

## Security operator actions

When a user requests a certificate the operator gets an email alerting them and instructing them to run `ndnop-process-requests` on their node.

Operator just need to ssh to the node, `sudo su - ndncert`, and issue

    ndnop-process-requests

If there are pending requests, the script will guide the process to accept/reject.

When accepted, the certificate will be created, published to local repo (using `tcp-bulk-insert` protocol---make sure that `repo-ng` is running before `ndnop-process-requests` is run), and uploaded to WEB system for the user to download it.