SSS

sss is an implement of Shamir's Secret Sharing Algorithm 256-bits in Elixir

Installation

SSS has been published on https://hex.pm/packages/sss
Adding sss to your list of dependencies in mix.exs:

def deps do
  [
    {:sss, "~> 0.1.0"}
  ]
end

1. An implement of Shamir's Secret Sharing Algorithm 256-bits in Elixir

Usage

Use encode/decode Base64URL

s = "nghiatcxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"

# Creates a set of shares
case SSS.create(3, 6, s, true) do
  {:ok, list} ->
    # Case normal
    case SSS.combine(Enum.slice(list, 0, 3), true) do
      {:ok, s1 } ->
        # IO.inspect(s1)
        assert s1 == s
      {:error, msg} ->
        IO.puts(msg)
        assert false
    end
  {:error, msg} ->
    IO.puts(msg)
    assert false
end

# or

# Creates a set of shares
list = SSS.create!(3, 6, s, true)
# Combines shares into secret
s1 = SSS.combine!(Enum.slice(list, 0, 3), true)
assert s1 == s

Use encode/decode Hex

s = "nghiatcxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"

# Creates a set of shares
case SSS.create(3, 6, s, false) do
  {:ok, list} ->
    # Case normal
    case SSS.combine(Enum.slice(list, 0, 3), false) do
      {:ok, s1 } ->
        assert s1 == s
      {:error, msg} ->
        IO.puts(msg)
        assert false
    end
  {:error, msg} ->
    IO.puts(msg)
    assert false
end

# or

# Creates a set of shares
list = SSS.create!(3, 6, s, false)
# Combines shares into secret
s1 = SSS.combine!(Enum.slice(list, 0, 3), false)
assert s1 == s

License

This code is under the Apache License v2.