urbit/pkg/base-dev/lib/jose.hoon
2021-09-17 14:51:19 +10:00

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/+ primitive-rsa, *pkcs
=* rsa primitive-rsa
|%
:: +en-base64url: url-safe base64 encoding, without padding
::
++ en-base64url
~(en base64:mimes:html | &)
:: +de-base64url: url-safe base64 decoding, without padding
::
++ de-base64url
~(de base64:mimes:html | &)
:: |octn: encode/decode unsigned atoms as big-endian octet stream
::
++ octn
|%
++ en |=(a=@u `octs`[(met 3 a) (swp 3 a)])
++ de |=(a=octs `@u`(rev 3 p.a q.a))
--
:: +eor: explicit sort order comparator
::
:: Lookup :a and :b in :lit, and pass their indices to :com.
::
++ eor
|= [com=$-([@ @] ?) lit=(list)]
|= [a=* b=*]
^- ?
(fall (bind (both (find ~[a] lit) (find ~[b] lit)) com) |)
:: +en-json-sort: json encoding with sorted object keys
::
:: XX move %zuse with sorting optional?
::
++ en-json-sort :: XX rename
|^ |=([sor=$-(^ ?) val=json] (apex val sor ""))
:: :: ++apex:en-json:html
++ apex
=, en-json:html
|= [val=json sor=$-(^ ?) rez=tape]
^- tape
?~ val (weld "null" rez)
?- -.val
%a
:- '['
=. rez [']' rez]
!.
?~ p.val rez
|-
?~ t.p.val ^$(val i.p.val)
^$(val i.p.val, rez [',' $(p.val t.p.val)])
::
%b (weld ?:(p.val "true" "false") rez)
%n (weld (trip p.val) rez)
%s
:- '"'
=. rez ['"' rez]
=+ viz=(trip p.val)
!.
|- ^- tape
?~ viz rez
=+ hed=(jesc i.viz)
?: ?=([@ ~] hed)
[i.hed $(viz t.viz)]
(weld hed $(viz t.viz))
::
%o
:- '{'
=. rez ['}' rez]
=/ viz
%+ sort ~(tap by p.val)
|=((pair) (sor (head p) (head q)))
?~ viz rez
!.
|- ^+ rez
?~ t.viz ^$(val [%s p.i.viz], rez [':' ^$(val q.i.viz)])
=. rez [',' $(viz t.viz)]
^$(val [%s p.i.viz], rez [':' ^$(val q.i.viz)])
==
--
:: %/lib/jose
::
:: |jwk: json representations of cryptographic keys (rfc7517)
::
:: Url-safe base64 encoding of key parameters in big-endian byte order.
:: RSA-only for now
::
++ jwk
|%
:: |en:jwk: encoding of json cryptographic keys
::
++ en
=> |%
:: +numb:en:jwk: base64-url encode big-endian number
::
++ numb (corl en-base64url en:octn)
--
|%
:: +pass:en:jwk: json encode public key
::
++ pass
|= k=key:rsa
^- json
[%o (my kty+s+'RSA' n+s+(numb n.pub.k) e+s+(numb e.pub.k) ~)]
:: +ring:en:jwk: json encode private key
::
++ ring
|= k=key:rsa
^- json
~| %rsa-need-ring
?> ?=(^ sek.k)
:- %o %- my :~
kty+s+'RSA'
n+s+(numb n.pub.k)
e+s+(numb e.pub.k)
d+s+(numb d.u.sek.k)
p+s+(numb p.u.sek.k)
q+s+(numb q.u.sek.k)
==
--
:: |de:jwk: decoding of json cryptographic keys
::
++ de
=, dejs-soft:format
=> |%
:: +numb:de:jwk: parse base64-url big-endian number
::
++ numb (cu (cork de-base64url (lift de:octn)) so)
--
|%
:: +pass:de:jwk: decode json public key
::
++ pass
%+ ci
=/ a (unit @ux)
|= [kty=@t n=a e=a]
^- (unit key:rsa)
=/ pub (both n e)
?~(pub ~ `[u.pub ~])
(ot kty+(su (jest 'RSA')) n+numb e+numb ~)
:: +ring:de:jwk: decode json private key
::
++ ring
%+ ci
=/ a (unit @ux)
|= [kty=@t n=a e=a d=a p=a q=a]
^- (unit key:rsa)
=/ pub (both n e)
=/ sek :(both d p q)
?:(|(?=(~ pub) ?=(~ sek)) ~ `[u.pub sek])
(ot kty+(su (jest 'RSA')) n+numb e+numb d+numb p+numb q+numb ~)
--
:: |thumb:jwk: "thumbprint" json-encoded key (rfc7638)
::
++ thumb
|%
:: +pass:thumb:jwk: thumbprint json-encoded public key
::
++ pass
|= k=key:rsa
(en-base64url 32 (shax (crip (en-json-sort aor (pass:en k)))))
:: +ring:thumb:jwk: thumbprint json-encoded private key
::
++ ring !!
--
--
:: |jws: json web signatures (rfc7515)
::
:: Note: flattened signature form only.
::
++ jws
|%
:: +sign:jws: sign json value
::
++ sign
|= [k=key:rsa pro=json lod=json]
|^ ^- json
=. pro header
=/ protect=cord (encode pro)
=/ payload=cord (encode lod)
:- %o %- my :~
protected+s+protect
payload+s+payload
signature+s+(sign protect payload)
==
:: +header:sign:jws: set signature algorithm in header
::
++ header
?> ?=([%o *] pro)
^- json
[%o (~(put by p.pro) %alg s+'RS256')]
:: +encode:sign:jws: encode json for signing
::
:: Alphabetically sort object keys, url-safe base64 encode
:: the serialized json.
::
++ encode
|= jon=json
%- en-base64url
%- as-octt:mimes:html
(en-json-sort aor jon)
:: +sign:sign:jws: compute signature
::
:: Url-safe base64 encode in big-endian byte order.
::
++ sign
|= [protect=cord payload=cord]
=/ msg=@t (rap 3 ~[protect '.' payload])
=/ sig=@ud (~(sign rs256 k) (met 3 msg) msg)
=/ len=@ud (met 3 n.pub.k)
(en-base64url len (rev 3 len sig))
--
:: +verify:jws: verify signature
::
++ verify !!
--
--