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[Tm-rid] HHIT trust proof for Auth messages

Robert Moskowitz <rgm@labs.htt-consult.com> Fri, 27 September 2019 16:40 UTC

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From: Robert Moskowitz <rgm@labs.htt-consult.com>
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Date: Fri, 27 Sep 2019 12:40:27 -0400
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Subject: [Tm-rid] HHIT trust proof for Auth messages
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And here is something I have been working on as condensed proof of HHIT 
ownership objects that can be put into the auth messages.  I have not 
done that yet, like Adam has:

     <figure>
         <artwork>
    0                   1 2                   3
    0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|                                                               |
   | HHIT                              |
|                                                               |
|                                                               |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   | TIMESTAMP                          |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|                                                               |
   | HHIT                              |
   | SIG                              |
.                                                               .
.                                                               .
.                                                               .
|                                                               |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   / PAYLOAD                            /
/                                                               /
   / +-------------------------------+
   / |                               |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

   HHIT           16 byte HHIT of EdDSA25519 HI
   TIMESTAMP      4 byte packet trust until timestamp
   HHIT SIG       64 byte Signature of whole packet
   PAYLOAD        0 to n bytes of payload
       Length     84 + n bytes
         </artwork>
     </figure>
     <figure>
         <artwork>
    0                   1 2                   3
    0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|                                                               |
   |                            DEV HHIT                           |
|                                                               |
|                                                               |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   | TIMESTAMP                          |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|                                                               |
   |                            DEV HHIT                           |
   | SIG                              |
.                                                               .
.                                                               .
.                                                               .
|                                                               |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|                                                               |
   |                              DEV HI                           |
|                                                               |
|                                                               |
|                                                               |
|                                                               |
|                                                               |
|                                                               |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   |                         AUTH TIMESTAMP                        |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|                                                               |
   |                           AUTH HHIT                           |
|                                                               |
|                                                               |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|                                                               |
   | AUTH                               |
   | SIG                              |
.                                                               .
.                                                               .
.                                                               .
|                                                               |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   / PAYLOAD                            /
/                                                               /
   / +-------------------------------+
   / |                               |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

   DEV HHIT       16 byte Dev HHIT of EdDSA25519 HI
   TIMESTAMP      4 byte packet trust until timestamp
   DEV HHIT SIG   64 byte Signature of whole packet
   DEV HI         32 byte Device HI of EdDSA25519 HI
   AUTH TIMESTAMP 4 byte Dev HHIT trust until timestamp
   AUTH HHIT      16 byte Authorizer's HHIT of EdDSA25519 HI
   AUTH SIG       64 byte Signature of Device HHIT-HI
   PAYLOAD        0 to n bytes of payload
       Length    200 + n bytes
         </artwork>
     </figure>

   |             Type              | Length            |

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