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Access control policies (oneM2M) [message #1749677]

Fri, 09 December 2016 12:15

Daan Ravesteijn

Messages: 1
Registered: December 2016

Junior Member

Hi,

When following the short tutorial on the wiki, I've created a new sensor and subscribed to it using my own application. This is all working great, my application is receiving updates whenever new data is published.

I've noticed the ACPs (Access Control Policies) for resources are automatically generated when creating the resources, giving full rights to the creator (in my case admin:admin) of those resources. Now I would like to add custom ACPs, as in assign multiple ACPs to one resource, with different user:pw combinations and different rights.

What would be the correct way of doing this?

Thanks in advance!

Daan

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Re: Access control policies (oneM2M) [message #1751479 is a reply to message #1749677]

Tue, 10 January 2017 16:10

Guillaume Garzone

Messages: 52
Registered: April 2015

Member

Hi and sorry for the delay.

First of all to have more detailed information about ACP, you can check in the TS-001 section 9.6.2 (and other sections) here: http://onem2m.org/technical/published-documents.

There are two ways to do what you want to achieve, in my opinion.

You can update the ACP linked to the AE by adding new access control rules with different rights and originators. The inconvenient is you will have to update each ACP for each AE.

The second option is to create a "generic" ACP (or several) and link it to the concerned AEs.
You can choose which privileges to give to a specific originator in the "acr" (access control rule). (section 6.3.4.2.29 of the TS-004 to know which numbers to use for the different rights).
What you can do is create a specific ACP with all the access control rules you need with specific originators. The originator is set to admin:admin for the administrator entity but you can set it to the specific originators used by your AEs (id used in the originator in the requests).

Here is an example of ACP resource:

<m2m:acp xmlns:m2m="http://www.onem2m.org/xml/protocols">
    <pv>
        <acr>
            <acor>admin:admin</acor>
            <acop>63</acop>
        </acr>
        <acr>
            <acor>test</acor>
            <acop>34</acop>
        </acr>
    </pv>
    <pvs>
        <acr>
            <acor>admin:admin</acor>
            <acop>63</acop>
        </acr>
    </pvs>
</m2m:acp>

In this example of ACP you have two sections: the privileges (pv) and the self privileges. The privileges gathers the access control rules (acr) regarding the rights with on the resources linked to the ACP.
The self privileges (pvs) section gathers the rules concerning the ACP itself. In the example, the admin has all rights on any linked resource and the "test" entity has only discovery and retrieval rights. However, only the admin can modify the ACP and change the privileges. The "test" AE will not be able to see nor modify this ACP.

Link it to the AE(s) by updating the "acpi" attribute of the concerned AEs (you will have to interact as admin to make this update).
Be careful the "acpi" is a list of acp uris so you can set multiple ACPs for an AE. Just list the resource-ids of the concerned ACPs (separated with a blank space " ").

Hope this helps,

Guillaume

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Re: Access control policies (oneM2M) [message #1760990 is a reply to message #1751479]

Fri, 05 May 2017 03:34

Fariz Alemuda

Messages: 9
Registered: July 2016

Junior Member

Hi Guillaume,

Would you mind to create a specific tutorial to create the ACP? Honestly, I am so confused to go through the standards. Specifically, about the Content-Type, what should we put as the Header. Thank you.

[Update]

My bad, I just found the standard in oneM2M spec TS-0004 (V2.7.1), Table 6.3.4.2.1-1

So now, it works.

Best Regards,

Fariz Alemuda

[Updated on: Fri, 05 May 2017 08:21]

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