Function CheckValidBucketNameS3Express

pkg/s3utils/utils.go:408–450

CheckValidBucketNameS3Express - checks if we have a valid input bucket name for S3 Express.

(bucketName string)

// CheckValidBucketNameS3Express - checks if we have a valid input bucket name for S3 Express.
func CheckValidBucketNameS3Express(bucketName string) (err error) {
	if strings.TrimSpace(bucketName) == "" {
		return errors.New("Bucket name cannot be empty for S3 Express")
	}

	if len(bucketName) < 3 {
		return errors.New("Bucket name cannot be shorter than 3 characters for S3 Express")
	}

	if len(bucketName) > 63 {
		return errors.New("Bucket name cannot be longer than 63 characters for S3 Express")
	}

	// Check if the bucket matches the regex
	if !validBucketNameS3Express.MatchString(bucketName) {
		return errors.New("Bucket name contains invalid characters")
	}

	// Extract bucket name (before --<az-id>--x-s3)
	parts := strings.Split(bucketName, "--")
	if len(parts) != 3 || parts[2] != "x-s3" {
		return errors.New("Bucket name pattern is wrong 'x-s3'")
	}
	bucketName = parts[0]

	// Additional validation for bucket name
	// 1. No consecutive periods or hyphens
	if strings.Contains(bucketName, "..") || strings.Contains(bucketName, "--") {
		return errors.New("Bucket name contains invalid characters")
	}

	// 2. No period-hyphen or hyphen-period
	if strings.Contains(bucketName, ".-") || strings.Contains(bucketName, "-.") {
		return errors.New("Bucket name has unexpected format or contains invalid characters")
	}

	// 3. No IP address format (e.g., 192.168.0.1)
	if ipAddress.MatchString(bucketName) {
		return errors.New("Bucket name cannot be an ip address")
	}

	return nil
}

// CheckValidBucketNameStrict - checks if we have a valid input bucket name.
// This is a stricter version.