~$ gem install bitcoin-cigsUsage:
~$ bitcoin-cigs
Usage: bitcoin-cigs command [arguments ...] [options ...]
Commands
verify bitcoin-address signature [message-file]
sign private-key [message-file]
Options
-m, --message MESSAGE Message can also be read from STDIN
-S, --no-strip Do not strip leading and trailing whitespace from message (stripped by default)Examples:
~$ # Sign with -m message parameter
~$ bitcoin-cigs sign 5JFZuDkLgbEXK4CUEiXyyz4fUqzAsQ5QUqufdJy8MoLA9S1RdNX -m 'this is a message'
HIBYi2g3yFimzD/YSD9j+PYwtsdCuHR2xwIQ6n0AN6RPUVDGttgOmlnsiwx90ZSjmaWrH1/HwrINJbaP7eMA6V4=
~$
~$ # Verify with message from STDIN
~$ echo 'this is a message' | bitcoin-cigs verify 11o51X3ciSjoLWFN3sbg3yzCM8RSuD2q9 HIBYi2g3yFimzD/YSD9j+PYwtsdCuHR2xwIQ6n0AN6RPUVDGttgOmlnsiwx90ZSjmaWrH1/HwrINJbaP7eMA6V4=
~$
~$ # Verify with message from file
~$ echo 'this is a message' > message.txt
~$ bitcoin-cigs verify 11o51X3ciSjoLWFN3sbg3yzCM8RSuD2q9 HIBYi2g3yFimzD/YSD9j+PYwtsdCuHR2xwIQ6n0AN6RPUVDGttgOmlnsiwx90ZSjmaWrH1/HwrINJbaP7eMA6V4= message.txt
~$ Sign a message:
require 'rubygems'
require 'bitcoin-cigs'
# Support for Wallet Import Format, Compressed WIF, Mini Format, Hex and Base64 wallets
wallet_key = "5JFZuDkLgbEXK4CUEiXyyz4fUqzAsQ5QUqufdJy8MoLA9S1RdNX"
message = "this is a message"
puts "The signature is: #{BitcoinCigs.sign_message!(wallet_key, message)}"Verify a message signature:
require 'rubygems'
require 'bitcoin-cigs'
address = "11o51X3ciSjoLWFN3sbg3yzCM8RSuD2q9"
signature = "HIBYi2g3yFimzD/YSD9j+PYwtsdCuHR2xwIQ6n0AN6RPUVDGttgOmlnsiwx90ZSjmaWrH1/HwrINJbaP7eMA6V4="
message = "this is a message"
if BitcoinCigs.verify_message(address, signature, message)
puts "It looks like you own address #{address}!"
endThanks to jackjack for pointing me to Armory's implementation of message signatures: https://github.com/jackjack-jj/jasvet
Bitcoin Cigs is maintained by Michael Pearce.
If you find this software useful and wish to donate, you can do so here:
1Cyd1wG4hCXK5aRCJQu3KnnhSrrfgs7NeM
Copyright (c) 2013 Michael Pearce. See LICENSE.txt for further details.
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