# File lib/aws/core/signature/version_2.rb, line 19 def add_authorization! credentials add_param('AWSAccessKeyId', credentials.access_key_id) if token = credentials.session_token add_param("SecurityToken", token) end add_param('SignatureVersion', '2') add_param('SignatureMethod', 'HmacSHA256') add_param('Signature', signature(credentials)) self.body = url_encoded_params end