Awesome

Shamir Secret Sharing

Split a random key into a number of shares. Using a number of these shares the key can be restored.

This is a nim wrapper around the c library by dsprenkels. Only the hazardous low level API is wrapped, so only use this when you know what you're doing.

Examples

Generate a uniform random key:

let key = randomKey()

Create 3 shares of the key, of which 2 are sufficient to restore the key:

let shares = key.shares(2, 3)

Restore the key by combining 2 shares:

let restored = combine(shares[0..1])

Updating to a newer version

Follow these steps when updating the wrapper to a newer version of sss:

1. update the git submodule in sources/ to point to the new version
2. run build.sh
3. update the version in sss.nimble
4. commit the changes