https://github.com/kleinernik/elixir-aes-cmac

AES CMAC (rfc 4493) in Elixir
https://github.com/kleinernik/elixir-aes-cmac

Last synced: 3 months ago
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AES CMAC (rfc 4493) in Elixir

• Host: GitHub
• URL: https://github.com/kleinernik/elixir-aes-cmac
• Owner: kleinernik
• License: mit
• Created: 2016-03-13T21:22:35.000Z (almost 9 years ago)
• Default Branch: master
• Last Pushed: 2020-01-08T12:29:59.000Z (about 5 years ago)
• Last Synced: 2024-10-12T21:29:23.691Z (4 months ago)
• Language: Elixir
• Size: 88.9 KB
• Stars: 9
• Watchers: 4
• Forks: 2
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

Awesome Lists containing this project

• freaking_awesome_elixir - Elixir - AES CMAC ([RFC 4493](https://tools.ietf.org/html/rfc4493)) in Elixir. (Cryptography)
• fucking-awesome-elixir - aescmac - AES CMAC ([RFC 4493](https://tools.ietf.org/html/rfc4493)) in Elixir. (Cryptography)
• awesome-elixir - aescmac - AES CMAC ([RFC 4493](https://tools.ietf.org/html/rfc4493)) in Elixir. (Cryptography)

README

        
# Hint for users of OTP >= 20

Since OTP 20 the AES-CMAC is in `:crypto`

You can simply use for example:

```elixir

:crypto.cmac :"aes_cbc128", <<0x2b7e1516_28aed2a6_abf71588_09cf4f3c::128>>,<<0x6bc1bee2_2e409f96_e93d7e11_7393172a_ae2d8a57_1e03ac9c_9eb76fac_45af8e51_30c81c46_a35ce411::320>>

```

See in [Erlang sources](https://github.com/erlang/otp/blob/83e20c62057ebc1d8064bf57b01be560cd244e1d/lib/crypto/src/crypto.erl#L159)

# Aescmac

Implementation of [rfc4493](https://tools.ietf.org/html/rfc4493) in elixir using :crypto from erlang for aes.

All [tests from rfc4493](https://tools.ietf.org/html/rfc4493#page-11) passing.

Aescmac.aes_cmac takes two binaries, the key and the message, where the key has to be 128bit

Usage example:

```elixir

#  Aescmac.aes_cmac(key, message)

<<0x070a16b4_6b4d4144_f79bdd9d_d04a287c::128>> = Aescmac.aes_cmac(<<0x2b7e1516_28aed2a6_abf71588_09cf4f3c::128>>,<<0x6bc1bee2_2e409f96_e93d7e11_7393172a::128>>)

```

## Documentation

Docs can be found [at hexdocs.pm](https://hexdocs.pm/aescmac/).

## Installation

[Available in Hex](https://hex.pm/packages/aescmac), the package can be installed with:

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

```elixir

    def deps do

      [{:aescmac, "~> 0.0.1"}]

    end

```

  2. Ensure aescmac is started before your application:

```elixir

    def application do

      [applications: [:aescmac]]

    end

```