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require 'openssl'
module EncryptionHelper
#### NOTE #### APP_CONFIG[:encryption_key] from config/config.yml
# should be stored on the server and not in your applications code base
module AES256CBC
def encrypt(plaintext)
aes = OpenSSL::Cipher::Cipher.new('AES-256-CBC')
aes.encrypt # must be call before #key and #iv
aes.key = Settings.encryption_key
aes.iv = iv = aes.random_iv
ciphertext = aes.update(plaintext)
ciphertext << aes.final
return iv, ciphertext
end
def decrypt(iv, ciphertext)
aes = OpenSSL::Cipher::Cipher.new('AES-256-CBC')
aes.decrypt # must be called before aes.key aes.iv
aes.key = Settings.encryption_key
aes.iv = iv
plaintext = aes.update(ciphertext)
plaintext << aes.final
end
end
end