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Generate, restore IOTA seed from Bitcoin BIP39 mnemonic
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README.md

IOTA Mnemonic

This is a command line tool to help user generate IOTA seed from Bitcoin BIP39 mnenomics

Install

$ pipenv install iota_mnemonic

To install IOTA mnemonic, simply run this simple command in your terminal of choice:

$ pipenv install iota_mnemonic

Get the source code

You can clone the source code from repository:

$ git clone https://github.com/mlouielu/iota-mnemonic

How to use

# Generate 24 words mnemonic and IOTA seed
$ python -m iota_mnemonic
Mnemonic: come grocery cube calm void liberty increase pigeon captain appear employ among 
float fancy cargo faith seek buzz argue lift agent split bachelor judge
IOTA Seed: RTWTRPAEGJQFRWAYTIJTKWZKLN9K9VRUETFSIPUAUCLKPNNSNWAKTOXBWSCPQVNNWDLTEIPMILIOVPGIX

# Generate mnemonic with passphrase
$ python -m iota_mnemonic -p TREZOR
Mnemonic: limit about defy sail base useless soul album aim border celery false asset average 
romance attract lonely track hope sun afford creek dignity couple
IOTA Seed: LIPSSXDAJQRLBPTTBQTPTYBMUSTJPXWGYBKLSSBDVKPVEAXDGPZXOWPMEGRNSHTJXIUVCXYFTOXMZKIMY

# Generate 12 words mnemonic with passphrase
$ python -m iota_mnemonic -s 128 -p TREZOR
Mnemonic: broccoli merry lucky milk lizard cannon area utility jelly click bag clever
IOTA Seed: YNONELPCFBKQDDQMIBBBGJDZODCKXEBIJIMXRUGBA9AOPJEQ9SYYLGID9IXHILWVVDJ9ZEGQHCGIHQ9TB

# Genreate mnemonic with japanese
$ python -m iota_mnemonic -l japanese
Mnemonic: こいぬ ようちえん むせん いんさつ しなもの ふのう かわく ひかり はいけん 
そんしつ たたかう ちいさい そうめん つうわ にんげん とおす さみだれ かまぼこ 
らくだ さずかる ふとる とんかつ きびしい ひつぜん
IOTA Seed: ISBAFGB9LBGOQYGKKMMNK9APICZCGWIJHCMLOLPAQITGSSIGBJJOYQZJJ9NNGYIJLFB9ORMJGCWFFFYQZ

# Output the mnemonic to file
$ python -m iota_mnemonic -p TREZOR -o mnemonic

# Recover seed from mnemonic
$ python -m iota_menmonic -p TREZOR -f mnemonic
Mnemonic: often various act decide tongue sausage summer wall priority knock finish until 
taxi robot panic toward giraffe acid avocado anchor travel kiwi actress cream
IOTA Seed: CRGFVETUFKUQYTPTEH9TP9BDKBVZLG9UZJDZBDMMFSSCUPIATPEZMKBLKXOEKCRDFHHFNCCBF9SKHNYIA

How it works?

To create IOTA seed from the mnemonic, we use IOTA Kerl function with a mnemonic sentence (in UTF-8 NFKD) used as the password and the string "mnemonic" + passphrase (again in UTF-8 NFKD) used as the salt.

To get a valid tryte hash, we concat salt and mnemonic sentence, and load into iota.Hash by from_string function. from_string will encode UTF-8 NFKD into bytes, then convert bytes into IOTA hash.

Using each hash, we then use hash trits and Kerl to absorb and squeeze:

trits = []
sponge = iota.crypto.kerl.Kerl()

for word in mnemonic:
    hash = iota.Hash.from_string(f'mnemonic{passphrase}{word}')
    hash_trits = hash.as_trits()
    k = iota.crypto.kerl.Kerl()
    k.absorb(hash_trits)
    k.squeeze(hash_trits)
    sponge.absorb(hash_trits)
sponge.squeeze(trits)
return iota.Hash.from_trits(trits)
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