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diagrams #27

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Aug 30, 2024
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diagrams #27

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0148f84
add diagrams in appendix
thomas-fossati Aug 29, 2024
3e6d8b4
Update draft-birkholz-cose-tsa-tst-header-parameter.md
henkbirkholz Aug 30, 2024
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41 changes: 41 additions & 0 deletions ascii-art/ctt.ascii-art
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@@ -0,0 +1,41 @@
.--------.
| Signer |
+--------+------------------------------------------.
| .-----------. |
| | phdr | |
| .-------. .---------. | .-----. | |
| | datum | / SK_cose / | | ... | | |
| '--+-+--' '----+----' | '-----' | |
| | | | '-+-+-------' |
| | | v | | |
| | | .-----. | | |
| | '--->| Sign1 |<-----' | |
| | '-+-+-' | | .-----.
| | | | | .----. | | TSA |
| | | '----------)--->| hash | | +-----+---------.
| | | | '-+--' | | .-. |
| | | | | | | | L | |
| | | | v | | '+' |
| | | | .----------------. | | | |
| | | | | messageImprint +-+->| v |
| | | | '----------------' | | .---------. |
| | | | | | | timestamp | |
| | | | .-------. | | '---------' |
| | | | | nonce +----------+->| ^ |
| | | | '-------' | | | |
| | | | | | .---+----. |
| | [signature] [phdr] | | / SK_tsa / |
| | | | | | '--------' |
| | | | .-----------------. | | |
| | | | | uhdr | | '-------+-------'
| | | | | .-----. .-----. | | |
| | | | | | ... | | TST |<--+---------'
| | | | | '-----' '-----' | |
| | | | '--------+--------' |
| | | | | |
'----+----------+-------------+----------+----------'
| | | |
[payload] v v [uhdr]
| .------------------. |
'------>| rfc3161-ctt COSE |<-----'
'------------------'
38 changes: 38 additions & 0 deletions ascii-art/ttc.ascii-art
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@@ -0,0 +1,38 @@
.--------. .-----.
| Signer | | TSA |
+--------+----------------------------------------. +-----+---------.
| .-------. .----. | | .-. |
| | datum +------------->| hash | | | | L | |
| '-+---+-' '-+--' | | '+' |
| | | | | | | |
| | | | | | v |
| | | v | | .---------. |
| | | .----------------. | | | timestamp | |
| | | | messageImprint +------+->| '---------' |
| | | '----------------' | | ^ |
| | | | | | |
| | | .-------. | | .---+----. |
| | | | nonce +---------------+->| / SK_tsa / |
| | | '-------' | | '--------' |
| | | | '-------+-------'
| | | .------------------. | |
| | | | phdr | | |
| | | .---------. | .-----. .-----. | | |
| | | / SK_cose / | | ... | | TST |<-----+---------'
| | | '----+----' | '-----' '-----' | |
| | | | '--+--+------------' |
| | | v | | |
| | | .-----. | | |
| | '-->| Sign1 |<-----' | .---------. |
| | '--+--' | | uhdr | |
| | | | | .-----. | |
| | | | | | ... | | |
| | [signature] [phdr] | '-----' | |
| | | | '----+----' |
| | | | | |
'---+------------+--------------+---------+-------'
| | | |
[payload] v v [uhdr]
| .------------------. |
'-------->| rfc3161-ttc COSE |<-----'
'------------------'
17 changes: 17 additions & 0 deletions draft-birkholz-cose-tsa-tst-header-parameter.md
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Expand Up @@ -183,6 +183,23 @@ IANA is requested to add the COSE header parameters defined in {{tbl-new-hdrs}}

--- back

# Diagrams

The diagrams in this appendix illustrate the processing flow of the modes specified in {{sec-timestamp-then-cose}} and {{sec-cose-then-timestamp}} respectively.

For simplicity, only the `COSE_Sign1` processing is shown.
Similar diagrams for `COSE_Sign` can be derived by allowing multiple `SK_cose` boxes and replacing the label `[signature]` with `[signatures]`.

~~~ aasvg
{::include ascii-art/ttc.ascii-art}
~~~
{: #fig-ttc artwork-align="left" title="Timestamp then COSE"}

~~~ aasvg
{::include ascii-art/ctt.ascii-art}
~~~
{: #fig-ctt artwork-align="left" title="COSE then Timestamp"}

# Acknowledgments
{:unnumbered}

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