Function scanSSHDirectory

cmd/fssh/setup_keys.go:179–248

scanSSHDirectory scans the SSH directory for private key files

(sshDir string)

// scanSSHDirectory scans the SSH directory for private key files
func scanSSHDirectory(sshDir string) ([]*SSHKeyInfo, error) {
	// Check if directory exists
	if _, err := os.Stat(sshDir); os.IsNotExist(err) {
		return nil, fmt.Errorf("SSH directory not found: %s", sshDir)
	}

	// Standard SSH private key patterns
	keyPatterns := []string{
		"id_rsa",
		"id_dsa",
		"id_ecdsa",
		"id_ed25519",
		"id_ecdsa_sk",
		"id_ed25519_sk",
	}

	var keys []*SSHKeyInfo

	// Read directory entries
	entries, err := os.ReadDir(sshDir)
	if err != nil {
		return nil, fmt.Errorf("failed to read SSH directory: %w", err)
	}

	// Scan for keys
	for _, entry := range entries {
		if entry.IsDir() {
			continue
		}

		filename := entry.Name()

		// Skip known non-key files
		if strings.HasSuffix(filename, ".pub") ||
			strings.HasSuffix(filename, ".ppk") ||
			filename == "config" ||
			filename == "known_hosts" ||
			filename == "authorized_keys" {
			continue
		}

		// Check if it matches standard patterns OR has no extension
		isStandardKey := false
		for _, pattern := range keyPatterns {
			if strings.HasPrefix(filename, pattern) {
				isStandardKey = true
				break
			}
		}

		// Also check files without extensions (potential custom keys)
		if !isStandardKey && !strings.Contains(filename, ".") {
			isStandardKey = true
		}

		if !isStandardKey {
			continue
		}