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@ottosch
Last active December 24, 2023 01:59
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Find all possibilities for the last seed word
#! /usr/bin/env bash
function run() {
read_wordlist
local input
printf "Enter seed words: "
read -r input
local seed_words=()
eval "seed_words=($input)"
local word_count=${#seed_words[@]}
verify_word_count "$word_count"
verify_valid_words "${seed_words[@]}"
printf "Seed has %d words\n\n" "$((word_count + 1))"
checksum_size=$((("$word_count" + 1) / 3))
bitstring=$(string_to_bistring "$input")
local possible_words=()
printf "Finding all %d words that match the checksum:\n" "$((2 ** (11 - "$checksum_size")))"
for index in "${!wordlist[@]}"; do
if verify_checksum "$index"; then
bip_word="${wordlist[$index]}"
possible_words[${#possible_words[@]}]="$bip_word"
echo -n "*"
else
echo -n "."
fi
done
printf "\nPossible words: %d\n\n" "${#possible_words[@]}"
echo "${possible_words[*]}"
}
function verify_word_count() {
if [ "$1" -lt 11 ] || [ "$1" -gt 23 ] || [ $(("$1" % 3)) -ne 2 ]; then
printf "Invalid word count: %d\nEnter 11, 14, 17, 20 or 23 words\n" "$1" >&2
exit 1
fi
}
function verify_valid_words() {
local arr=("$@")
for word in "${arr[@]}"; do
local found=false
for bip_word in "${wordlist[@]}"; do
if [ "$word" == "$bip_word" ]; then
found=true
break
fi
done
if ! "$found"; then
printf "word %s is invalid\n" "$word" >&2
exit 1
fi
done
}
function string_to_bistring() {
local string=()
eval "string=($1)"
local bitstring=""
for word in "${string[@]}"; do
for index in "${!wordlist[@]}"; do
local bip_word="${wordlist[$index]}"
if [ "$word" == "$bip_word" ]; then
bitstring+=$(dec_to_bin index)
break
fi
done
done
printf "%s" "$bitstring"
}
function verify_checksum() {
local bits_last_word
bits_last_word=$(dec_to_bin index)
local full_bitstring="${bitstring}${bits_last_word}"
local length=${#full_bitstring}
local bits_without_checksum="${full_bitstring:0:length-checksum_size}"
local hex_string
hex_string=$(bin_to_hex "$bits_without_checksum")
local hash
hash=$(sha256 "$hex_string")
local checksum_bits
checksum_bits=$(hex_to_bin "${hash:0:2}")
local actual_checksum_bits="${checksum_bits:0:checksum_size}"
local input_checksum_bits="${full_bitstring:length-checksum_size}"
[ "$input_checksum_bits" == "$actual_checksum_bits" ]
}
function sha256() {
local hex="$1"
local binary=""
local i=0
while [ "$i" -lt "${#hex}" ]; do
binary+="\\x${hex:i:2}"
i=$((i += 2))
done
printf "%b" "$binary" | sha256sum
}
function dec_to_bin() {
local n bit
for ((n = $1; n > 0; n >>= 1)); do
bit="$((n & 1))$bit"
done
printf "%011d" "$bit"
}
function bin_to_hex() {
local number="$1"
for ((i = 0; i < ${#number}; i += 4)); do
local segment="${number:i:4}"
case $segment in
0000) hex_digit="0" ;;
0001) hex_digit="1" ;;
0010) hex_digit="2" ;;
0011) hex_digit="3" ;;
0100) hex_digit="4" ;;
0101) hex_digit="5" ;;
0110) hex_digit="6" ;;
0111) hex_digit="7" ;;
1000) hex_digit="8" ;;
1001) hex_digit="9" ;;
1010) hex_digit="A" ;;
1011) hex_digit="B" ;;
1100) hex_digit="C" ;;
1101) hex_digit="D" ;;
1110) hex_digit="E" ;;
1111) hex_digit="F" ;;
esac
local hex_number+="$hex_digit"
done
printf "%s" "$hex_number"
}
function hex_to_bin() {
local number="$1"
for ((i = 0; i < ${#number}; i += 1)); do
local segment="${number:i:1}"
case ${segment,} in
0) bin_string="0000" ;;
1) bin_string="0001" ;;
2) bin_string="0010" ;;
3) bin_string="0011" ;;
4) bin_string="0100" ;;
5) bin_string="0101" ;;
6) bin_string="0110" ;;
7) bin_string="0111" ;;
8) bin_string="1000" ;;
9) bin_string="1001" ;;
a) bin_string="1010" ;;
b) bin_string="1011" ;;
c) bin_string="1100" ;;
d) bin_string="1101" ;;
e) bin_string="1110" ;;
f) bin_string="1111" ;;
esac
local bin_number+="$bin_string"
done
printf "%s" "$bin_number"
}
function read_wordlist() {
wordlist=(abandon ability able about above absent absorb abstract absurd abuse access accident account accuse achieve acid acoustic acquire across act action actor actress actual adapt add addict address adjust admit adult advance advice aerobic affair afford afraid again age agent agree ahead aim air airport aisle alarm album alcohol alert alien all alley allow almost alone alpha already also alter always amateur amazing among amount amused analyst anchor ancient anger angle angry animal ankle announce annual another answer antenna antique anxiety any apart apology appear apple approve april arch arctic area arena argue arm armed armor army around arrange arrest arrive arrow art artefact artist artwork ask aspect assault asset assist assume asthma athlete atom attack attend attitude attract auction audit august aunt author auto autumn average avocado avoid awake aware away awesome awful awkward axis baby bachelor bacon badge bag balance balcony ball bamboo banana banner bar barely bargain barrel base basic basket battle beach bean beauty because become beef before begin behave behind believe below belt bench benefit best betray better between beyond bicycle bid bike bind biology bird birth bitter black blade blame blanket blast bleak bless blind blood blossom blouse blue blur blush board boat body boil bomb bone bonus book boost border boring borrow boss bottom bounce box boy bracket brain brand brass brave bread breeze brick bridge brief bright bring brisk broccoli broken bronze broom brother brown brush bubble buddy budget buffalo build bulb bulk bullet bundle bunker burden burger burst bus business busy butter buyer buzz cabbage cabin cable cactus cage cake call calm camera camp can canal cancel candy cannon canoe canvas canyon capable capital captain car carbon card cargo carpet carry cart case cash casino castle casual cat catalog catch category cattle caught cause caution cave ceiling celery cement census century cereal certain chair chalk champion change chaos chapter charge chase chat cheap check cheese chef cherry chest chicken chief child chimney choice choose chronic chuckle chunk churn cigar cinnamon circle citizen city civil claim clap clarify claw clay clean clerk clever click client cliff climb clinic clip clock clog close cloth cloud clown club clump cluster clutch coach coast coconut code coffee coil coin collect color column combine come comfort comic common company concert conduct confirm congress connect consider control convince cook cool copper copy coral core corn correct cost cotton couch country couple course cousin cover coyote crack cradle craft cram crane crash crater crawl crazy cream credit creek crew cricket crime crisp critic crop cross crouch crowd crucial cruel cruise crumble crunch crush cry crystal cube culture cup cupboard curious current curtain curve cushion custom cute cycle dad damage damp dance danger daring dash daughter dawn day deal debate debris decade december decide decline decorate decrease 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inform inhale inherit initial inject injury inmate inner innocent input inquiry insane insect inside inspire install intact interest into invest invite involve iron island isolate issue item ivory jacket jaguar jar jazz jealous jeans jelly jewel job join joke journey joy judge juice jump jungle junior junk just kangaroo keen keep ketchup key kick kid kidney kind kingdom kiss kit kitchen kite kitten kiwi knee knife knock know lab label labor ladder lady lake lamp language laptop large later latin laugh laundry lava law lawn lawsuit layer lazy leader leaf learn leave lecture left leg legal legend leisure lemon lend length lens leopard lesson letter level liar liberty library license life lift light like limb limit link lion liquid list little live lizard load loan lobster local lock logic lonely long loop lottery loud lounge love loyal lucky luggage lumber lunar lunch luxury lyrics machine mad magic magnet maid mail main major make mammal man manage mandate mango mansion manual maple 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}
run
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