code: func FnBase64(name string, input interface{}, template interface{}) interface{} {
  
  	// { "Fn::Base64" : valueToEncode }
  
  	// Check the input is a string
  	if src, ok := input.(string); ok {
  		return base64.StdEncoding.EncodeToString([]byte(src))
  	}
  
  	return nil
  
  }
docs: // FnBase64 resolves the 'Fn::Base64' AWS CloudFormation intrinsic function.
  // See: http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/intrinsic-function-reference-base64.htmlpackage intrinsics