Re: [KEYPROV] DISCUSS and COMMENT: draft-ietf-keyprov-symmetrickeyformat

[Sean Turner <[e-mail]>]

Sean Turner wrote:
> I got two comments that I was hoping the PSKC authors could help me with 
> because they will probably get the exact same DISCUSS and COMMENT from 
> Alexey:
> 
> 
>> Alexey Melnikov wrote:
>> DISCUSS
>>> 3.3.5:
>>>
>>> o pinUsageMode indicates the way the PIN is used during the usage of 
>>>      the key.  The following values are defined: Local, Prepend,      
>>> Append, Algorithmic.
>>>
>>> The meaning of the choices is not clear to me. So I don't think
>>> they can be used in an interoperable fashion.
> 
> Is there some text lounging around that I can use or do we have to come 
> up with our own?

I found the text in PSKC.

>  >COMMENT
>>> 3.2.7. Algorithm Parameters
>>>
>>>   o min defines the minimum size of the challenge accepted by the 
>>>         device for CR mode.  If encoding is 'DECIMAL', 'HEXADECIMAL' 
>>> or         'ALPHANUMERIC' this value indicates the minimum number of 
>>>         digits/characters.
>>>
>>> So just to double check: for a HEXADECIMAL value "ABCD", min is 4, 
>>> not 2?
>>> (The same question about "max", ResponseFormat/"length", 
>>> PINPolicy/"minLength" & "maxLength")
>>>
>>>         If encoding is 'BASE64' or 'BINARY', this         value 
>>> indicates the minimum number of bytes of the unencoded         value.
> 
> Is he correct or is there some other interpretation?

Still curious about this one.