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Implement blake2b.
It's not generalized yet, so blake2s isn't supported.
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Fang
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lib/bip.hoon
182
lib/bip.hoon
@ -242,6 +242,188 @@
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==
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--
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::
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::
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:: blake2
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::
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::TODO generalize for both blake2 variants
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++ blake2b
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|= [msg=byts key=byts out=@ud]
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^- @
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:: initialization vector
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=/ iv=@
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0x6a09.e667.f3bc.c908.
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bb67.ae85.84ca.a73b.
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3c6e.f372.fe94.f82b.
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a54f.f53a.5f1d.36f1.
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510e.527f.ade6.82d1.
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9b05.688c.2b3e.6c1f.
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1f83.d9ab.fb41.bd6b.
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5be0.cd19.137e.2179
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:: per-round constants
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=/ sigma=(list (list @ud))
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:~ :~ 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 ==
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:~ 14 10 4 8 9 15 13 6 1 12 0 2 11 7 5 3 ==
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:~ 11 8 12 0 5 2 15 13 10 14 3 6 7 1 9 4 ==
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:~ 7 9 3 1 13 12 11 14 2 6 5 10 4 0 15 8 ==
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:~ 9 0 5 7 2 4 10 15 14 1 11 12 6 8 3 13 ==
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:~ 2 12 6 10 0 11 8 3 4 13 7 5 15 14 1 9 ==
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:~ 12 5 1 15 14 13 4 10 0 7 6 3 9 2 8 11 ==
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:~ 13 11 7 14 12 1 3 9 5 0 15 4 8 6 2 10 ==
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:~ 6 15 14 9 11 3 0 8 12 2 13 7 1 4 10 5 ==
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:~ 10 2 8 4 7 6 1 5 15 11 9 14 3 12 13 0 ==
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:~ 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 ==
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:~ 14 10 4 8 9 15 13 6 1 12 0 2 11 7 5 3 ==
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==
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=> |%
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++ get-word-list
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|= [h=@ w=@ud]
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^- (list @)
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%- flop
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=+ l=(rip 6 h)
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=- (weld - l)
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(reap (sub w (lent l)) 0)
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::
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++ get-word
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|= [h=@ i=@ud w=@ud]
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^- @
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%+ snag i
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(get-word-list h w)
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::
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++ put-word
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|= [h=@ i=@ud w=@ud d=@]
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^- @
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%+ rep 6
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=+ l=(get-word-list h w)
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%- flop
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%+ weld (scag i l)
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[d (slag +(i) l)]
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::
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++ mod-word
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|* [h=@ i=@ud w=@ud g=$-(@ @)]
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(put-word h i w (g (get-word h i w)))
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::
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++ pad
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|= [byts len=@ud]
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(lsh 3 (sub len wid) dat)
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::
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++ compress
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|= [h=@ c=@ t=@ud l=?]
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^- @
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:: set up local work vector
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=+ v=(add (lsh 6 8 h) iv)
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:: xor the counter t into v
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=. v
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%- mod-word
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:^ v 12 16
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(cury mix (end 0 64 t))
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=. v
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%- mod-word
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:^ v 13 16
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(cury mix (rsh 0 64 t))
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:: for the last block, invert v14
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=? v l
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%- mod-word
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:^ v 14 16
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(cury mix 0xffff.ffff.ffff.ffff)
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:: twelve rounds of message mixing
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=+ i=0
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=| s=(list @)
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|^
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?: =(i 12)
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:: xor upper and lower halves of v into state h
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=. h (mix h (rsh 6 8 v))
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(mix h (end 6 8 v))
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:: select message mixing schedule and mix v
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=. s (snag (mod i 10) sigma)
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=. v (do-mix 0 4 8 12 0 1)
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=. v (do-mix 1 5 9 13 2 3)
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=. v (do-mix 2 6 10 14 4 5)
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=. v (do-mix 3 7 11 15 6 7)
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=. v (do-mix 0 5 10 15 8 9)
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=. v (do-mix 1 6 11 12 10 11)
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=. v (do-mix 2 7 8 13 12 13)
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=. v (do-mix 3 4 9 14 14 15)
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$(i +(i))
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::
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++ do-mix
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|= [na=@ nb=@ nc=@ nd=@ nx=@ ny=@]
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^- @
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=- =. v (put-word v na 16 a)
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=. v (put-word v nb 16 b)
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=. v (put-word v nc 16 c)
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(put-word v nd 16 d)
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%- b2mix
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:* (get-word v na 16)
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(get-word v nb 16)
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(get-word v nc 16)
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(get-word v nd 16)
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(get-word c (snag nx s) 16)
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(get-word c (snag ny s) 16)
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==
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--
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::
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++ b2mix
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|= [a=@ b=@ c=@ d=@ x=@ y=@]
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^- [a=@ b=@ c=@ d=@]
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=. x (rev 3 8 x)
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=. y (rev 3 8 y)
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=+ fed=~(. fe 6)
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=. a :(sum:fed a b x)
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=. d (ror:fed 0 32 (mix d a))
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=. c (sum:fed c d)
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=. b (ror:fed 0 24 (mix b c))
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=. a :(sum:fed a b y)
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=. d (ror:fed 0 16 (mix d a))
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=. c (sum:fed c d)
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=. b (ror:fed 0 63 (mix b c))
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[a b c d]
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--
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:: ensure inputs adhere to contraints
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=. out (max 1 (min out 64))
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=. wid.msg (min wid.msg (bex 128))
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=. wid.key (min wid.key 64)
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=. dat.msg (end 3 wid.msg dat.msg)
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=. dat.key (end 3 wid.key dat.key)
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:: initialize state vector
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=+ h=iv
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:: mix key length and output length into h0
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=. h
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%- mod-word
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:^ h 0 8
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%+ cury mix
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%+ add 0x101.0000
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(add (lsh 3 1 wid.key) out)
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:: keep track of how much we've compressed
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=* mes dat.msg
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=+ com=0
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=+ rem=wid.msg
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:: if we have a key, pad it and prepend to msg
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=? mes (gth wid.key 0)
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(can 3 ~[rem^mes 128^(pad key 128)])
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=? rem (gth wid.key 0)
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(add rem 128)
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|-
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:: compress 128-byte chunks of the message
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?: (gth rem 128)
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=+ c=(cut 3 [(sub rem 128) 128] mes)
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=. com (add com 128)
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%_ $
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rem (sub rem 128)
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h (compress h c com |)
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==
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:: compress the final bytes of the msg
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=+ c=(cut 3 [0 rem] mes)
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=. com (add com rem)
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=. c (pad [rem c] 128)
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=. h (compress h c com &)
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:: produce output of desired length
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%^ rsh 3 (sub 64 out)
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:: do some word
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%+ rep 6
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%+ turn (flop (gulf 0 7))
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|= a=@
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(rev 3 8 (get-word h a 8))
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::
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++ hash160
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|= d=@
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(ripemd-160 256 (sha-256:sha d))
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