AES Cipher example in Crystal

aes.cr

require "openssl/cipher"

module AES
  def self.encrypt(data, password)
    cipher = OpenSSL::Cipher.new("aes-128-cbc")
    cipher.encrypt
    cipher.key = password
    io = IO::Memory.new
    io.write(cipher.update(data))
    io.write(cipher.final)
    io.to_slice
  end

  def self.decrypt(data, password)
    cipher = OpenSSL::Cipher.new("aes-128-cbc")
    cipher.decrypt
    cipher.key = password
    io = IO::Memory.new
    io.write(cipher.update(data))
    io.write(cipher.final)
    io.to_s
  end
end

encrypted = AES.encrypt("my awesome data", "my awesome password")

pp AES.decrypt(encrypted, "my awesome password")

Thanks. Good reference.

Thank you so much. Works also with AES-CBC-256.