Make a SSH Ed25519 private/public keypair of anything you can pipe into a UNIX pipe

Usage of anything2ed25519:
  -force
    	When true, you ignore the author's recommendation about seed size
    	(should be at minimum 32 chars, more is better) and continues with your stupidness
  -privfile string
    	Filename to write private key to (default "id_ed25519")
  -privtoerr
    	When true, the tool prints private key to stderr and public to stdout
  -pubfile string
    	Filename to write public key to (default "id_ed25519.pub")
  -write
    	When true it writes the private and public keys to file (default true)

The command is intended to work with pipes.
Example:
	echo 'never lose a key again 81S1r8zpVuFjpJ5odwDTmplp4HZ5JskQ' | anything2ed25519

Install (for golang users)

go install 0xcc.re/anything2ed25519@latest

Compile

export GOLANG="$PWD/go"
mkdir -p go/src/0xcc.re
cd go/src/0xcc.re
git clone https://github.com/mikalv/anything2ed25519.git
cd anything2ed25519
./build.sh

Example usage

NOTE Please don't be stupid and use this key, or anything else with a WEAK seed. (As "Hello World" is...)

anything2ed25519 [main●] % echo "Hello World" | ./bin/anything2ed25519-darwin-amd64.macho
-----BEGIN OPENSSH PRIVATE KEY-----
b3BlbnNzaC1rZXktdjEAAAAABG5vbmUAAAAEbm9uZQAAAAAAAAABAAAAMwAAAAtz
c2gtZWQyNTUxOQAAACBkj/xWESur4UT48VFau6Vkk56Kzt48qvJk/UGR2DS7dAAA
AIiaywRCmssEQgAAAAtzc2gtZWQyNTUxOQAAACBkj/xWESur4UT48VFau6Vkk56K
zt48qvJk/UGR2DS7dAAAAEBhNTkxYTZkNDBiZjQyMDQwNGEwMTE3MzNjZmI3YjE5
MGSP/FYRK6vhRPjxUVq7pWSTnorO3jyq8mT9QZHYNLt0AAAAAAECAwQF
-----END OPENSSH PRIVATE KEY-----

ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAICv3hIFN8Aw2k16freruJ1Ve4L0V7Z6bKwnYrV7R071+

Prebuilt binaries

Check out the directory bin

Notes

The crypto is experimental, however don't be stupid. echo'ing "password", or "abc" or "hello world" or anything common into anything2ed25519 - don't ever use that anywhere, since people can guess your private key.. This is like a bitcoin "mnemonic code" and should have at least 24 words..

Changelog

2022-02-01 patch#3 : The tool now requires -force flag to create bad/too weak seeds
2022-02-01 patch#2 : Added flags and more usability stuff
2022-02-01 patch#1 : Some bugs found and fixed after public release, thanks to people at lobste.rs
~3-4yrs ago: Initial write

Author

Mikal Villa mikalv@mikalv.net