licensing

app/models/aes_crypt.rb

@@ -0,0 +1,38 @@
+class AesCrypt
+	@cipher = ""
+
+	def initialize
+		@cipher = OpenSSL::Cipher::Cipher.new(ENV["cipher_type"])
+	end
+
+	private
+	def export_key(passphrase)
+		# We want a 256 bit key symetric key based on passphrase
+		digest = Digest::SHA256.new
+		key = digest.update(passphrase)
+		# key = digest.digest 
+		ENV['aes_key']  = @cipher.key = key # stores the key in key, and also sets the generated key on the @cipher
+		ENV['aes_iv']  = @cipher.iv = @cipher.random_iv # stores the iv in iv, and also sets the generated iv on the @cipher
+		return @cipher.key, @cipher.iv
+	end
+
+	def encrypt(data)
+		cipher.encrypt
+		cipher.key = ENV["aes_key"]
+		cipher.iv = ENV["aes_iv"]
+		encrypted = cipher.update(data) + cipher.final
+		encrypted = Base64.encode64(encrypted)
+		return encrypted
+	end
+
+	def decrypt(data) 
+		cipher.decrypt
+		cipher.key = ENV["aes_key"]
+		cipher.iv = ENV["aes_iv"]
+
+		# Start the decryption
+		decoded = Base64.decode64(data)
+		decrypted = cipher.update(decoded) + cipher.final
+		return decrypted
+	end
+end