https://github.com/eins78/dice-keygen

A command line app that prompts the user to enter inputs from coin flips, or 4, 8, or 16-sided dice and turns them into a hexadecimal string. Prompted by my own desire to create a cryptographically secure Bitcoin private key offline using dice, and my unhappiness with relying on SHA-256 to produce truly random output, as "dice-wallet" does.
https://github.com/eins78/dice-keygen

Last synced: about 1 month ago
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A command line app that prompts the user to enter inputs from coin flips, or 4, 8, or 16-sided dice and turns them into a hexadecimal string. Prompted by my own desire to create a cryptographically secure Bitcoin private key offline using dice, and my unhappiness with relying on SHA-256 to produce truly random output, as "dice-wallet" does.

• Host: GitHub
• URL: https://github.com/eins78/dice-keygen
• Owner: eins78
• License: mit
• Created: 2014-06-28T16:12:38.000Z (over 10 years ago)
• Default Branch: master
• Last Pushed: 2014-06-27T14:39:00.000Z (over 10 years ago)
• Last Synced: 2024-04-15T03:00:40.792Z (9 months ago)
• Language: Shell
• Size: 578 KB
• Stars: 0
• Watchers: 2
• Forks: 2
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

        
dice-keygen

===========

A command line app that prompts the user to enter inputs from coin flips, or 4, 8, or 16-sided dice and turns them into a hexadecimal string. Prompted by my own desire to create a cryptographically secure Bitcoin private key offline using dice, and my unhappiness with relying on SHA-256 to produce truly random output, as "dice-wallet" does.

Build instructions:

    gcc -o keygen keygen.c -lgmp -lm

Requires [the GNU Multiple Precision Arithmetic Library](https://gmplib.org/).

If you are using this utility to create a Bitcoin private key, specify a bit length of at most 256 when prompted. Also, make sure that the generated hexadecimal string is not larger than `FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEBAAEDCE6AF48A03BBFD25E8CD0364141`, which is the maximum value that can be turned into a Bitcoin private key, according to [the wiki](https://en.bitcoin.it/wiki/Private_key#Range_of_valid_private_keys).

To go from the hexadecimal private key to a Bitcoin private key and public address with bash (preferably using a Linux live image on an offline, air-gapped computer), use [Lucien Grondilu's bitcoin-bash-tools](https://github.com/grondilu/bitcoin-bash-tools). Assuming you go this route and download `bitcoin.sh` from that project, use it like so:

    source bitcoin.sh

    newBitcoinKey 

I've also included a copy of Lucien's script in this repository in case the one hosted under his account ever goes offline or is compromised.