mirror of
https://github.com/urbit/shrub.git
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341 lines
11 KiB
Plaintext
341 lines
11 KiB
Plaintext
!:
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:: Crypto library for toys. Don't use these for anything real.
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:: They will take forever and skywrite your secret key over Fort Meade.
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::
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|%
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++ aes
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=+ [gr=(ga 8 0x11b 3) few==>(fe .(a 5))]
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=+ [pro=pro.gr dif=dif.gr pow=pow.gr ror=ror.few]
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=+ [nnk=8 nnb=4 nnr=14]
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=>
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=> |%
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++ cipa :: AES params
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$_ ^? |%
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++ co _[p=@ q=@ r=@ s=@] :: col coefs
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++ ix |+(a=@ _@) :: key index
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++ ro _[p=@ q=@ r=@ s=@] :: row shifts
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++ su _@ :: s-box
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--
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--
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|%
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++ fort :: encrypt
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^- cipa
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|%
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++ co [0x2 0x3 1 1]
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++ ix |+(a=@ a)
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++ ro [0 1 2 3]
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++ su 0x16bb.54b0.0f2d.9941.6842.e6bf.0d89.a18c.
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df28.55ce.e987.1e9b.948e.d969.1198.f8e1.
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9e1d.c186.b957.3561.0ef6.0348.66b5.3e70.
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8a8b.bd4b.1f74.dde8.c6b4.a61c.2e25.78ba.
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08ae.7a65.eaf4.566c.a94e.d58d.6d37.c8e7.
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79e4.9591.62ac.d3c2.5c24.0649.0a3a.32e0.
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db0b.5ede.14b8.ee46.8890.2a22.dc4f.8160.
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7319.5d64.3d7e.a7c4.1744.975f.ec13.0ccd.
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d2f3.ff10.21da.b6bc.f538.9d92.8f40.a351.
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a89f.3c50.7f02.f945.8533.4d43.fbaa.efd0.
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cf58.4c4a.39be.cb6a.5bb1.fc20.ed00.d153.
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842f.e329.b3d6.3b52.a05a.6e1b.1a2c.8309.
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75b2.27eb.e280.1207.9a05.9618.c323.c704.
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1531.d871.f1e5.a534.ccf7.3f36.2693.fdb7.
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c072.a49c.afa2.d4ad.f047.59fa.7dc9.82ca.
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76ab.d7fe.2b67.0130.c56f.6bf2.7b77.7c63
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--
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::
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++ firs :: decrypt
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^- cipa
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|%
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++ co [0xe 0xb 0xd 0x9]
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++ ix |=(a=@ (sub nnr a))
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++ ro [0 3 2 1]
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++ su 0x7d0c.2155.6314.69e1.26d6.77ba.7e04.2b17.
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6199.5383.3cbb.ebc8.b0f5.2aae.4d3b.e0a0.
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ef9c.c993.9f7a.e52d.0d4a.b519.a97f.5160.
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5fec.8027.5910.12b1.31c7.0788.33a8.dd1f.
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f45a.cd78.fec0.db9a.2079.d2c6.4b3e.56fc.
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1bbe.18aa.0e62.b76f.89c5.291d.711a.f147.
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6edf.751c.e837.f9e2.8535.ade7.2274.ac96.
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73e6.b4f0.cecf.f297.eadc.674f.4111.913a.
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6b8a.1301.03bd.afc1.020f.3fca.8f1e.2cd0.
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0645.b3b8.0558.e4f7.0ad3.bc8c.00ab.d890.
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849d.8da7.5746.155e.dab9.edfd.5048.706c.
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92b6.655d.cc5c.a4d4.1698.6886.64f6.f872.
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25d1.8b6d.49a2.5b76.b224.d928.66a1.2e08.
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4ec3.fa42.0b95.4cee.3d23.c2a6.3294.7b54.
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cbe9.dec4.4443.8e34.87ff.2f9b.8239.e37c.
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fbd7.f381.9ea3.40bf.38a5.3630.d56a.0952
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--
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::
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++ mcol
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|= [a=(list ,@) b=[p=@ q=@ r=@ s=@]] ^- (list ,@)
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=+ c=[p=_@ q=_@ r=_@ s=_@]
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|- ^- (list ,@)
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?~ a ~
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=> .(p.c (cut 3 [0 1] i.a))
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=> .(q.c (cut 3 [1 1] i.a))
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=> .(r.c (cut 3 [2 1] i.a))
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=> .(s.c (cut 3 [3 1] i.a))
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:_ $(a t.a)
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%+ can 3
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:~ [1 :(dif (pro p.c p.b) (pro q.c q.b) (pro r.c r.b) (pro s.c s.b))]
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[1 :(dif (pro p.c s.b) (pro q.c p.b) (pro r.c q.b) (pro s.c r.b))]
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[1 :(dif (pro p.c r.b) (pro q.c s.b) (pro r.c p.b) (pro s.c q.b))]
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[1 :(dif (pro p.c q.b) (pro q.c r.b) (pro r.c s.b) (pro s.c p.b))]
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==
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::
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++ pode :: explode to block
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|= [a=bloq b=@ c=@] ^- (list ,@)
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=+ d=(rip a c)
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=+ m=(met a c)
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|-
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?: =(m b)
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d
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$(m +(m), d (weld d (limo [0 ~])))
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++ sube :: s-box word
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|= [a=@ b=@] ^- @
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(rep 3 (turn (pode 3 4 a) |=(c=@ (cut 3 [c 1] b))))
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--
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|%
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++ ciph :: AES cipher
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|= [a=@ b=@ t=cipa] ^- @
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=> %= .
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+
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=> +
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|%
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++ ankh
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|= [a=@ b=@]
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(pode 5 nnb (cut 5 [(mul (ix.t a) nnb) nnb] b))
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++ sark
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|= [c=(list ,@) d=(list ,@)] ^- (list ,@)
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?~ c ~
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?~ d !!
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[(mix i.c i.d) $(c t.c, d t.d)]
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++ srow
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|= a=(list ,@) ^- (list ,@)
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=+ [i=0 b=~ c=ro.t]
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|-
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?: =(i nnb)
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b
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:_ $(i +(i))
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%+ can 3
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:~ [1 (cut 3 [0 1] (snag (mod (add p.c i) nnb) a))]
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[1 (cut 3 [1 1] (snag (mod (add q.c i) nnb) a))]
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[1 (cut 3 [2 1] (snag (mod (add r.c i) nnb) a))]
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[1 (cut 3 [3 1] (snag (mod (add s.c i) nnb) a))]
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==
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++ subs
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|= a=(list ,@) ^- (list ,@)
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?~ a ~
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[(sube i.a su.t) $(a t.a)]
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--
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==
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=+ [s=(pode 5 nnb a) i=1]
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=> .(s (sark s (ankh 0 b)))
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|-
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?. =(nnr i)
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=> .(s (subs s))
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=> .(s (srow s))
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=> .(s (mcol s co.t))
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=> .(s (sark s (ankh i b)))
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$(i +(i))
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=> .(s (subs s))
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=> .(s (srow s))
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=> .(s (sark s (ankh nnr b)))
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(rep 5 s)
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++ keen :: key expansion
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|= a=@ ^- @
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=+ [b=a c=0 d=su:fort i=nnk]
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|-
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?: =(i (mul nnb +(nnr)))
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b
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=> .(c (cut 5 [(dec i) 1] b))
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=> ?: =(0 (mod i nnk))
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=> .(c (ror 3 1 c))
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=> .(c (sube c d))
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.(c (mix c (pow (dec (div i nnk)) 2)))
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?: &((gth nnk 6) =(4 (mod i nnk)))
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.(c (sube c d))
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.
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=> .(c (mix c (cut 5 [(sub i nnk) 1] b)))
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=> .(b (cat 5 b c))
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$(i +(i))
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++ keep :: inv expansion
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|= a=@ ^- @
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=+ [i=1 j=_@ b=_@ c=firs]
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|-
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?: =(nnr i)
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a
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=> .(b (cut 7 [i 1] a))
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=> .(b (rep 5 (mcol (pode 5 4 b) co.c)))
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=> .(j (sub nnr i))
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%= $
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i +(i)
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a
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%+ can 7
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:~ [i (cut 7 [0 i] a)]
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[1 b]
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[j (cut 7 [+(i) j] a)]
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==
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==
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++ bren |=([k=@I m=@H] (ciph m (keen k) fort)) :: AES en, one block
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++ brin |=([k=@I m=@H] (ciph m (keep (keen k)) firs)) :: AES de, one block
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++ burn :: AES random blocks
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|= [key=@I haf=@H len=@]
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=+ i=0
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|-
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?: =(i len)
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0
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(rap 7 (bren key (mix i haf)) $(i +(i)) ~)
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++ en
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|+ [key=@I msg=@] ^- @uv
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=+ len=(met 7 msg)
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=+ adj=?:(=(0 len) 1 len)
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=+ hax=(shax (mix key (shax (mix adj msg))))
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=+ haf=(mix (cut 7 [0 1] hax) (cut 7 [1 1] hax))
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=+ ret=(can 7 ~[[2 hax] [adj (mix (burn key haf adj) msg)]])
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ret
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++ de
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|+ [key=@I cep=@] ^- (unit ,@uv)
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=+ toh=(met 7 cep)
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?: (lth toh 3)
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~
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=+ adj=(sub toh 2)
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=+ [hax=(end 8 1 cep) bod=(rsh 8 1 cep)]
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=+ haf=(mix (cut 7 [0 1] hax) (cut 7 [1 1] hax))
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=+ msg=(mix (burn key haf adj) bod)
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?. =(hax (shax (mix key (shax (mix adj msg)))))
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~
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[~ msg]
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--
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++ ed :: ed25519
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=> =+ b=256
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=+ q=(sub (bex 255) 19)
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=+ fq=~(. fo q)
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=+ ^= l
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%+ add
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(bex 252)
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27.742.317.777.372.353.535.851.937.790.883.648.493
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=+ d=(dif.fq 0 (fra.fq 121.665 121.666))
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=+ ii=(exp.fq (div (dec q) 4) 2)
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|%
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++ norm |=(x=@ ?:(=(0 (mod x 2)) x (sub q x)))
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::
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++ xrec :: recover x-coord
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|= y=@ ^- @
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=+ ^= xx
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%+ mul (dif.fq (mul y y) 1)
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(inv.fq +(:(mul d y y)))
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=+ x=(exp.fq (div (add 3 q) 8) xx)
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?: !=(0 (dif.fq (mul x x) (sit.fq xx)))
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(norm (pro.fq x ii))
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(norm x)
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::
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++ ward :: edwards multiply
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|= [pp=[@ @] qq=[@ @]] ^- [@ @]
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=+ dp=:(pro.fq d -.pp -.qq +.pp +.qq)
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=+ ^= xt
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%+ pro.fq
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%+ sum.fq
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(pro.fq -.pp +.qq)
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(pro.fq -.qq +.pp)
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(inv.fq (sum.fq 1 dp))
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=+ ^= yt
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%+ pro.fq
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%+ sum.fq
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(pro.fq +.pp +.qq)
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(pro.fq -.pp -.qq)
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(inv.fq (dif.fq 1 dp))
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[xt yt]
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::
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++ scam :: scalar multiply
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|= [pp=[@ @] e=@] ^- [@ @]
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?: =(0 e)
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[0 1]
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=+ qq=$(e (div e 2))
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=> .(qq (ward qq qq))
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?: =(1 (dis 1 e))
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(ward qq pp)
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qq
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::
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++ etch :: encode point
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|= pp=[@ @] ^- @
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(can 0 ~[[(sub b 1) +.pp] [1 (dis 1 -.pp)]])
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::
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++ curv :: point on curve?
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|= [x=@ y=@] ^- ?
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.= 0
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%+ dif.fq
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%+ sum.fq
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(pro.fq (sub q (sit.fq x)) x)
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(pro.fq y y)
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(sum.fq 1 :(pro.fq d x x y y))
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::
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++ deco :: decode point
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|= s=@ ^- (unit ,[@ @])
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=+ y=(cut 0 [0 (dec b)] s)
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=+ si=(cut 0 [(dec b) 1] s)
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=+ x=(xrec y)
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=> .(x ?:(!=(si (dis 1 x)) (sub q x) x))
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=+ pp=[x y]
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?. (curv pp)
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~
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[~ pp]
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::
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--
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=+ ^= bb
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=+ bby=(pro.fq 4 (inv.fq 5))
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[(xrec bby) bby]
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|%
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++ puck :: public key
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|= sk=@ ^- @
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=+ h=(shal (rsh 0 3 b) sk)
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=+ ^= a
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%+ add
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(bex (sub b 2))
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(lsh 0 3 (cut 0 [3 (sub b 5)] h))
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=+ aa=(scam bb a)
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(etch aa)
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::
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++ sign :: certify
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|= [m=@ sk=@ pk=@] ^- @
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=+ h=(shal (rsh 0 3 b) sk)
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=+ ^= a
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%+ add
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(bex (sub b 2))
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(lsh 0 3 (cut 0 [3 (sub b 5)] h))
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=+ ^= r
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=+ hm=(cut 0 [b b] h)
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=+ ^= i
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%+ can 0
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:~ [b hm]
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[(met 0 m) m]
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==
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(shaz i)
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=+ rr=(scam bb r)
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=+ ^= ss
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=+ er=(etch rr)
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=+ ^= ha
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%+ can 0
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:~ [b er]
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[b pk]
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[(met 0 m) m]
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==
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(~(sit fo l) (add r (mul (shaz ha) a)))
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(can 0 ~[[b (etch rr)] [b ss]])
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::
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++ veri :: validate
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|= [s=@ m=@ pk=@] ^- ?
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?: (gth (div b 4) (met 3 s)) |
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?: (gth (div b 8) (met 3 pk)) |
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=+ rr=(deco (cut 0 [0 b] s))
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?~ rr |
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=+ aa=(deco pk)
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?~ aa |
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=+ ss=(cut 0 [b b] s)
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=+ ha=(can 0 ~[[b (etch u.rr)] [b pk] [(met 0 m) m]])
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=+ h=(shaz ha)
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=((scam bb ss) (ward u.rr (scam u.aa h)))
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::
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--
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--
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