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47 lines
931 B
Plaintext
47 lines
931 B
Plaintext
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:: bip39 implementation in hoon
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::
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/+ bip39-english
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::
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|%
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++ from-entropy
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|= byts
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^- tape
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=. wid (mul wid 8)
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~| [%unsupported-entropy-bit-length wid]
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?> &((gte wid 128) (lte wid 256))
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::
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=+ cs=(div wid 32)
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=/ check=@
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%^ rsh 0 (sub 256 cs)
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(sha-256l:sha (div wid 8) dat)
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=/ bits=byts
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:- (add wid cs)
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%+ can 0
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:~ cs^check
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wid^dat
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==
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::
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=/ pieces
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|- ^- (list @)
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:- (end 0 11 dat.bits)
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?: (lte wid.bits 11) ~
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$(bits [(sub wid.bits 11) (rsh 0 11 dat.bits)])
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::
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=/ words=(list tape)
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%+ turn pieces
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|= ind=@ud
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(snag ind `(list tape)`bip39-english)
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::
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%+ roll (flop words)
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|= [nex=tape all=tape]
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?~ all nex
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:(weld all " " nex)
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::
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::NOTE always produces a 512-bit result
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++ to-seed
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|= [mnem=tape pass=tape]
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^- @
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%- hmac-sha512t:pbkdf:crypto
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[(crip mnem) (crip (weld "mnemonic" pass)) 2.048 64]
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--
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