Re: [yang-doctors] Definition for base64

["Acee Lindem (acee)" <[e-mail]>]

Hi Mahesh,

As Andy states, the base64 encodings are type string in the existing YANG data nodes.

See search for base64:

https://www.yangcatalog.org/yang-search/yang-search.php
Thanks,
Acee

From: yang-doctors <[e-mail]> on behalf of Mahesh Jethanandani <[e-mail]>
Date: Friday, August 17, 2018 at 1:46 PM
To: Andy Bierman <[e-mail]>
Cc: YANG Doctors <[e-mail]>
Subject: Re: [yang-doctors] Definition for base64

I have a protocol (Babel) that defines router-id as a base64 string of 8 octets. I could define it as a string, but isn’t it the case that base64 includes only a set of printable characters defined by the regex below? Not all printable characters are included in the set.


On Aug 17, 2018, at 10:40 AM, Andy Bierman <[e-mail]<mailto:[e-mail]>> wrote:

Hi,

Aren't you confusing YANG data types with message encoding?
A base64 string at the YANG level is just a string. There are no non-printable chars
like a binary string could have.  Not sure why the type base64 is interesting in YANG data models.


Andy


On Fri, Aug 17, 2018 at 10:26 AM, Mahesh Jethanandani <[e-mail]<mailto:[e-mail]>> wrote:
Is there a definition for base64 defined in one of the YANG models? I would prefer to use one if it defined. If not, I was going to define one as

 typedef base64 {
    type string {
      pattern '(([A-Za-z0-9+/]{4})*([A-Za-z0-9+/]{3}=|'
            + '[A-Za-z0-9+/]{2}==)?){1}';
    }
    description
      "A binary-to-text encoding scheme to represent binary data in
       an ASCII string format.";
    reference
      "RFC 4648, The Base16, Base32, and Base64 Data Encodings";
  }

Mahesh Jethanandani
[e-mail]<mailto:[e-mail]>

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Mahesh Jethanandani
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