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Simplification

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Armin Friedl 2020-01-19 13:55:46 +01:00
parent aa1c835186
commit 10f1d755c2
Signed by: armin
GPG key ID: 48C726EEE7FBCBC8
1 changed files with 39 additions and 39 deletions
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@ -1,36 +1,32 @@
* Communication * Communication
** Frame ** Frame
Header ::: content-length: u64 | message-type: u8 ::: 72 bit, fixed Header ::: content-length: u16 | message-type: u8 ::: 3 byte, fixed
Body ::: content: [u8; content-length] ::: conent-length byte, variable Body ::: content: [u8; content-length] ::: conent-length byte, variable
Numbers are in network byte order. Unsigned integers in network byte order.
** Message Types ** Message Types
| Ordinal | Type | Body Format | Direction | Transitions | Description | | Ordinal | Type | Body Format | Direction | Transitions | Description |
|---------+-------+-----------------+-----------+------------------+----------------------------------------------| |---------+-------------+-----------------+-----------+--------------------------+-------------------------------------------|
| 0 | Hello | Public Key | C -> S | Waiting for Link | Initiates communication | | 0x00 | Hello | Client PK | C -> S | Link, KeyNotFound, Error | Initiates communication |
| 1 | Link | <empty> | S -> C | Put, Get | Link established, communication can start | | 0x01 | Link | <empty> | S -> C | Get, Bye | Link established, communication can start |
| 2 | Put | Coffer (sealed) | C -> S | OkPut | Merge a ~Coffer~ for the client | | 0x02 | Get | <empt> | C -> S | OkGet, Error | Retrieve a secrets for the client |
| 3 | Get | Coffer (sealed) | C -> S | OkGet | Retrieve a ~Coffer~ for the client | | 0x03 | OkGet | Coffer (sealed) | S -> C | Bye | Send secrets to the client |
| 4 | OkPut | <empty> | S -> C | Put, Get | ~Coffer~ was successfully merged | | 0x99 | Bye | Client PK | C -> S | • | Close connection |
| 5 | OkGet | Coffer (sealed) | S -> C | Put, Get | Return a sealed ~Coffer~ for a ~Get~ request | | 0xaa | KeyNotFound | Client PK | S -> C | • | PK unknown to server |
| 63 | Bye | | C -> S | | Close connection | | 0xff | Error | UTF-8 String | S -> C | • | Generic server error with reason |
| 127 | Error | | S -> C | | Generic server error |
- Error can be returned at any stage
- Communication can end at any stage. Communication ends when connection is closed by either side.
- Seal is determined by communication direction: - Seal is determined by communication direction:
C -> S: sealed by server public key, client private key C -> S: sealed by server public key, client private key
S -> C: sealed by client public key, server private key S -> C: sealed by client public key, server private key
- Secrets returned as sealed cbor
* Coffer * Coffer
- Multitree with each leave terminating in a Vec<u8> - Sharded KV-Store
- Nodes (except leaves = key path) are utf8 strings - Keys are UTF-8 Strings
- A ~Put~ request must contain a fully determined ~Coffer~ (all leaves are values) - Typed values as defined by TOML: String, Integer, Float, Boolean, Date
- A ~Get~ request contains a partially determined ~Coffer~ (values are ignored)
- If a node resolves to a parent, the subtree (which is also a ~Coffer~) is returned
- If a node resolves to a leave, the partial ~Coffer~ terminating in the leave and its value are returned
* Coffer Server * Coffer Server
A ~coffer-server~ can support multiple clients by means of /sharding/ the A ~coffer-server~ can support multiple clients by means of /sharding/ the
keyspace. Clients are uniquely identified by their public key. keyspace. Clients are uniquely identified by their public key.
@ -43,26 +39,30 @@
key. No tampered requests can be sent or communication data collected except key. No tampered requests can be sent or communication data collected except
the private keys are compromised. the private keys are compromised.
* Coffer YAML * Coffer Definition (TOML)
** Secrets Definition Encrypted Authentication: SK of coffer-companion, PK of coffer-server
Encrypted with: SK of coffer-companion, PK of coffer-server
#+BEGIN_SRC yaml #+BEGIN_SRC yaml
# Names for ids (public keys) of clients # Names for ids (public keys) of clients
[clients] [clients]
file = "AAAA-AAAA-AAAA-AAAA" file = "AAAA-AAAA-AAAA-AAAA"
bin = "FFFF-FFFF-FFFF-FFFF" bin = "FFFF-FFFF-FFFF-FFFF"
# Secrets for a named client (defined in clients) # Secrets for a named client (defined in clients)
[file] [file]
secretkey = "secret value" secretkey = "secret value"
secretkey2 = "secret value2" secretkey2 = "secret value2"
#+END_SRC #+END_SRC
** Secret Response * Coffer Response
file client executes GET to server Encrypted Authentication: SK of coffer-server, PK of coffer-client
Format: cbor
CofferResponse = List<CofferSecret>
CofferSecret {
key: UTF-8 String,
value: CofferValue
}
#+BEGIN_SRC yaml CofferValue = String | Integer | Float | Boolean | Date
secretkey = "secret value"
secretkey2 = "secret value2"
#+END_SRC