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|
/+ naive, ethereum, server
=>
|%
+$ challenges (set secret)
+$ secret @uv
+$ authorization
$: who=@p
=secret
adr=tape
sig=tape
==
+$ user-sessions (map comet=@p id=@p)
+$ sessions
$: =challenges
users=user-sessions
==
--
|_ [=sessions =bowl:gall]
+$ sess ^sessions
:: state field to keep track of users logged with metamask
++ login ^- @p
=/ session (~(get by users.sessions) src.bowl)
?~ session src.bowl
u.session
:: this goes on the router
++ serve-metamask-challenge
|= eyre-id=@ta
:: special-case MetaMask auth handling
=/ new-challenge (sham [now eny]:bowl)
%+ weld (self-poke [%meta new-challenge])
%+ give-simple-payload:app:server
eyre-id
^- simple-payload:http
:- :- 200
~[['Content-Type' 'application/json']]
`(as-octs:mimes:html (en:json:html (enjs-challenge new-challenge)))
:: Modified from ~rabsef-bicrym's %mask by ~hanfel-dovned.
++ process-metamask-auth
|= [order-id=@t octs=(unit octs)]
^- (list card:agent:gall)
=/ challenges challenges.sessions
|^
?~ octs ~|(%empty-auth-request !!)
:: ?. =('auth' (cut 3 [0 4] q.u.octs))
:: *(list card:agent:gall)
=/ jon (de:json:html q.u.octs)
?~ jon ~|(%empty-auth-json !!)
=/ body=json u.jon
=/ axn (dejs-action body)
=/ is-valid (validate who.axn secret.axn adr.axn sig.axn)
~& >> signature-valid=[is-valid who.axn secret.axn adr.axn sig.axn]
?. is-valid ~|(%bad-metamask-signature !!)
%+ weld
(self-poke [%auth who.axn src.bowl secret.axn])
%+ give-simple-payload:app:server
order-id
^- simple-payload:http
:- :- 200
~[['Content-Type' 'application/json']]
=/ obj=json %- pairs:enjs:format :~([%login-ok [%b .y]])
`(as-octs:mimes:html (en:json:html obj))
++ validate
|= [who=@p challenge=secret address=tape hancock=tape]
^- ?
=/ addy (from-tape address)
=/ cock (from-tape hancock)
=/ owner (get-owner who) ?~ owner
~& "no owner"
%.n
?. =(addy u.owner)
~& "wrong owner"
%.n
?. (~(has in challenges) challenge)
~& "bad challenge"
%.n
=/ note=@uvI
=+ octs=(as-octs:mimes:html (scot %uv challenge))
%- keccak-256:keccak:crypto
%- as-octs:mimes:html
;: (cury cat 3)
'\19Ethereum Signed Message:\0a'
(crip (a-co:co p.octs))
q.octs
==
?. &(=(20 (met 3 addy)) =(65 (met 3 cock)))
~& "addy != cock"
%.n
=/ r (cut 3 [33 32] cock)
=/ s (cut 3 [1 32] cock)
=/ v=@
=+ v=(cut 3 [0 1] cock)
?+ v 99
%0 0
%1 1
%27 0
%28 1
==
?. |(=(0 v) =(1 v))
~& "wrong v"
%.n
=/ xy
(ecdsa-raw-recover:secp256k1:secp:crypto note v r s)
=/ pub :((cury cat 3) y.xy x.xy 0x4)
=/ add (address-from-pub:key:ethereum pub)
=(addy add)
::
++ from-tape
|=(h=tape ^-(@ux (scan h ;~(pfix (jest '0x') hex))))
::
++ get-owner
|= who=@p
^- (unit @ux)
=- ?~ pin=`(unit point:naive)`-
~
?. |(?=(%l1 dominion.u.pin) ?=(%l2 dominion.u.pin))
~
`address.owner.own.u.pin
.^ (unit point:naive)
%gx
%+ en-beam
[our.bowl %azimuth [%da now.bowl]]
/point/(scot %p who)/noun
==
++ dejs-action
|= jon=json
^- authorization
=, dejs:format
%. jon
%- ot
:~ [%who (se %p)]
[%secret (se %uv)]
[%address sa]
[%signature sa]
==
--
++ enjs-challenge
=, enjs:format
|= chal=@
^- json
%- pairs
:~ [%challenge [%s (scot %uv chal)]]
==
++ self-poke
|= noun=*
^- (list card:agent:gall)
:~ [%pass /gib %agent [our.bowl dap.bowl] %poke %noun !>(noun)]
==
:: these are the poke handlers
++ handle-meta
|= new-challenge=@ ^- ^sessions
=? users.sessions
!(~(has by users.sessions) src.bowl)
(~(put by users.sessions) [src.bowl src.bowl])
=? challenges.sessions
=(src.bowl (~(got by users.sessions) src.bowl))
(~(put in challenges.sessions) new-challenge)
sessions
++ handle-auth
|= [who=@p src=@p =secret] ^- ^sessions
~& > "%ustj: Successful authentication of {<src>} as {<who>}."
=. users.sessions (~(put by users.sessions) src who)
=. challenges.sessions (~(del in challenges.sessions) secret)
sessions
--
|
