Bitcoin address generator in bash

generate_bitcoin_address.sh

#!/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. — You are receiving this because you were mentioned. Reply to this email directly, view it on GitHub, or unsubscribe. Triage notifications on the go with GitHub Mobile for iOS or Android.

Negative.