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Bitcoin address generator in bash
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#!/bin/bash | |
# | |
# This is free and unencumbered software released into the public domain. | |
# | |
# Requires bc, dc, openssl, xxd | |
# | |
# by grondilu from https://bitcointalk.org/index.php?topic=10970.msg156708#msg156708 | |
base58=({1..9} {A..H} {J..N} {P..Z} {a..k} {m..z}) | |
bitcoinregex="^[$(printf "%s" "${base58[@]}")]{34}$" | |
if [ `uname -s` = 'Darwin' ]; then | |
TAC="tail -r " | |
else | |
TAC="tac" | |
fi | |
decodeBase58() { | |
local s=$1 | |
for i in {0..57} | |
do s="${s//${base58[i]}/ $i}" | |
done | |
dc <<< "16o0d${s// /+58*}+f" | |
} | |
encodeBase58() { | |
# 58 = 0x3A | |
echo -n "$1" | sed -e's/^\(\(00\)*\).*/\1/' -e's/00/1/g' | tr -d '\n' | |
dc -e "16i ${1^^} [3A ~r d0<x]dsxx +f" | | |
while read -r n; do echo -n "${base58[n]}"; done | |
} | |
checksum() { | |
xxd -p -r <<<"$1" | | |
openssl dgst -sha256 -binary | | |
openssl dgst -sha256 -binary | | |
xxd -p -c 80 | | |
head -c 8 | |
} | |
checkBitcoinAddress() { | |
if [[ "$1" =~ $bitcoinregex ]] | |
then | |
h=$(decodeBase58 "$1") | |
checksum "00${h::${#h}-8}" | | |
grep -qi "^${h: -8}$" | |
else return 2 | |
fi | |
} | |
hash160() { | |
openssl dgst -sha256 -binary | | |
openssl dgst -rmd160 -binary | | |
xxd -p -c 80 | |
} | |
hash160ToAddress() { | |
printf "%34s\n" "$(encodeBase58 "00$1$(checksum "00$1")")" | | |
sed "y/ /1/" | |
} | |
publicKeyToAddress() { | |
hash160ToAddress $( | |
openssl ec -pubin -pubout -outform DER | | |
tail -c 65 | | |
hash160 | |
) | |
} | |
echo -n "Public key: " | |
openssl ecparam -name secp256k1 -genkey | tee priv.pem | openssl ec -pubout | publicKeyToAddress | |
echo "" | |
echo -n "Private key: " | |
cat priv.pem | |
echo "" |
@b4zz4 Can you clarify what you mean? The Bitcoin address is the public address but not the public key. I think you're wanting to see it output a public key in addition to the Base58 address. That may be possible but I don't really have the bandwidth available to do it.
I thought they were recovering the key, encrypting messages inside the wallets.
@colindean commented on this gist.
…________________________________
@b4zz4 Can you clarify what you mean? The Bitcoin address is the public address but not the public key. I think you're wanting to see it output a public key in addition to the Base58 address. That may be possible but I don't really have the bandwidth available to do it.
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Is it possible to recover the public key from the bitcoin direction?
for example to encrypt messages using openssl