var config BucketSSEConfig
	err := xml.NewDecoder(r).Decode(&config)
	if err != nil {
		return nil, err
	}

	// Validates server-side encryption config rules
	// Only one rule is allowed on AWS S3
	if len(config.Rules) != 1 {
		return nil, errors.New("only one server-side encryption rule is allowed at a time")
	}

	for _, rule := range config.Rules {
		switch rule.DefaultEncryptionAction.Algorithm {
		case AES256: