Krypto

Crypto library in Elixir, using Erlang public_key and OpenSSL ports

Installation

The package can be installed as:

1. Add krypto to your list of dependencies in mix.exs:

   def deps do

    [{:krypto, "~> 0.1.4"}]

   end

2. Ensure krypto is started before your application:

   def application do

    [applications: [:krypto]]

   end

Overview

Krypto is a light-weight crypto implementation for Elixir build with simplicity, speed and security in mind.

Example

You can use krypto in your Elixir application to do the following:

1. Generate an RSA key pair (in DER format):

   { publicKey, privateKey } = Krypto.RSA.getKeypair()

2. Encrypt using the public key:

   encrypted_secret = Krypto.RSA.encrypt("Super secret message", publicKey)

3. Decrypt using the private key:

   decrypted_secret = Krypto.RSA.decrypt(encrypted_secret, privateKey)

4. Sign a message:

   message = "This message should be signed", signature = Krypto.RSA.sign(message, privateKey) if Krypto.RSA.verify(message, signatre, publicKey) do

    IO.puts "This signature matches!"

   end

5. Get message digests:

   hash_md5 = Krypto.Hash.md5("Hash me in md5!") hash_sha224 = Krypto.Hash.sha224("Hash me in sha224!") hash_sha256 = Krypto.Hash.sha256("Hash me in sha256 (our prefered one)!") hash_sha384 = Krypto.Hash.sha384("Hash me in sha384!")

You can additionally use krypto to generate 2048bit RSA key pairs, built with escript, as a command line application, by running:

mix escript.build
./krypto