|
| 1 | +package backup |
| 2 | + |
| 3 | +import ( |
| 4 | + "encoding/json" |
| 5 | + "errors" |
| 6 | + "fmt" |
| 7 | + "os" |
| 8 | + "path/filepath" |
| 9 | + "time" |
| 10 | + |
| 11 | + "github.com/managedssh/managedssh/internal/vault" |
| 12 | +) |
| 13 | + |
| 14 | +const ( |
| 15 | + bundleVersion = 1 |
| 16 | + bundleName = "managedssh-export.json" |
| 17 | +) |
| 18 | + |
| 19 | +type bundle struct { |
| 20 | + Version int `json:"version"` |
| 21 | + CreatedAt string `json:"created_at"` |
| 22 | + VaultJSON json.RawMessage `json:"vault_json"` |
| 23 | + HostsJSON json.RawMessage `json:"hosts_json"` |
| 24 | +} |
| 25 | + |
| 26 | +func DefaultPath() (string, error) { |
| 27 | + home, err := os.UserHomeDir() |
| 28 | + if err != nil { |
| 29 | + return "", err |
| 30 | + } |
| 31 | + return filepath.Join(home, bundleName), nil |
| 32 | +} |
| 33 | + |
| 34 | +func ExportPathForDir(dir string) string { |
| 35 | + return filepath.Join(dir, bundleName) |
| 36 | +} |
| 37 | + |
| 38 | +func Export(path string) error { |
| 39 | + dir, err := vault.Dir() |
| 40 | + if err != nil { |
| 41 | + return err |
| 42 | + } |
| 43 | + |
| 44 | + vaultPath := filepath.Join(dir, "vault.json") |
| 45 | + hostsPath := filepath.Join(dir, "hosts.json") |
| 46 | + |
| 47 | + vaultData, err := os.ReadFile(vaultPath) |
| 48 | + if err != nil { |
| 49 | + return fmt.Errorf("reading vault metadata: %w", err) |
| 50 | + } |
| 51 | + |
| 52 | + hostsData, err := os.ReadFile(hostsPath) |
| 53 | + if err != nil { |
| 54 | + return fmt.Errorf("reading hosts data: %w", err) |
| 55 | + } |
| 56 | + |
| 57 | + b := bundle{ |
| 58 | + Version: bundleVersion, |
| 59 | + CreatedAt: time.Now().UTC().Format(time.RFC3339), |
| 60 | + VaultJSON: json.RawMessage(vaultData), |
| 61 | + HostsJSON: json.RawMessage(hostsData), |
| 62 | + } |
| 63 | + |
| 64 | + out, err := json.MarshalIndent(b, "", " ") |
| 65 | + if err != nil { |
| 66 | + return fmt.Errorf("encoding export bundle: %w", err) |
| 67 | + } |
| 68 | + |
| 69 | + if err := os.MkdirAll(filepath.Dir(path), 0700); err != nil { |
| 70 | + return fmt.Errorf("creating export directory: %w", err) |
| 71 | + } |
| 72 | + |
| 73 | + tmp := path + ".tmp" |
| 74 | + if err := os.WriteFile(tmp, out, 0600); err != nil { |
| 75 | + return fmt.Errorf("writing export bundle: %w", err) |
| 76 | + } |
| 77 | + if err := os.Rename(tmp, path); err != nil { |
| 78 | + return fmt.Errorf("finalizing export bundle: %w", err) |
| 79 | + } |
| 80 | + return nil |
| 81 | +} |
| 82 | + |
| 83 | +func Import(path string) error { |
| 84 | + b, err := loadBundle(path) |
| 85 | + if err != nil { |
| 86 | + return err |
| 87 | + } |
| 88 | + |
| 89 | + dir, err := vault.Dir() |
| 90 | + if err != nil { |
| 91 | + return err |
| 92 | + } |
| 93 | + if err := os.MkdirAll(dir, 0700); err != nil { |
| 94 | + return fmt.Errorf("creating config directory: %w", err) |
| 95 | + } |
| 96 | + |
| 97 | + if err := atomicWrite(filepath.Join(dir, "vault.json"), b.VaultJSON, 0600); err != nil { |
| 98 | + return fmt.Errorf("writing vault metadata: %w", err) |
| 99 | + } |
| 100 | + if err := atomicWrite(filepath.Join(dir, "hosts.json"), b.HostsJSON, 0600); err != nil { |
| 101 | + return fmt.Errorf("writing hosts data: %w", err) |
| 102 | + } |
| 103 | + |
| 104 | + return nil |
| 105 | +} |
| 106 | + |
| 107 | +func VerifyMasterPassword(path, password string) error { |
| 108 | + b, err := loadBundle(path) |
| 109 | + if err != nil { |
| 110 | + return err |
| 111 | + } |
| 112 | + |
| 113 | + key, err := vault.UnlockWithMetaJSON(password, b.VaultJSON) |
| 114 | + if err != nil { |
| 115 | + if errors.Is(err, vault.ErrWrongPassword) { |
| 116 | + return vault.ErrWrongPassword |
| 117 | + } |
| 118 | + return fmt.Errorf("verifying backup master key: %w", err) |
| 119 | + } |
| 120 | + vault.ZeroKey(key) |
| 121 | + return nil |
| 122 | +} |
| 123 | + |
| 124 | +func loadBundle(path string) (*bundle, error) { |
| 125 | + data, err := os.ReadFile(path) |
| 126 | + if err != nil { |
| 127 | + return nil, fmt.Errorf("reading import bundle: %w", err) |
| 128 | + } |
| 129 | + |
| 130 | + var b bundle |
| 131 | + if err := json.Unmarshal(data, &b); err != nil { |
| 132 | + return nil, fmt.Errorf("decoding import bundle: %w", err) |
| 133 | + } |
| 134 | + if b.Version != bundleVersion { |
| 135 | + return nil, fmt.Errorf("unsupported bundle version: %d", b.Version) |
| 136 | + } |
| 137 | + if len(b.VaultJSON) == 0 { |
| 138 | + return nil, fmt.Errorf("import bundle is missing vault data") |
| 139 | + } |
| 140 | + if len(b.HostsJSON) == 0 { |
| 141 | + return nil, fmt.Errorf("import bundle is missing hosts data") |
| 142 | + } |
| 143 | + |
| 144 | + var vaultDoc map[string]any |
| 145 | + if err := json.Unmarshal(b.VaultJSON, &vaultDoc); err != nil { |
| 146 | + return nil, fmt.Errorf("invalid vault data in import bundle: %w", err) |
| 147 | + } |
| 148 | + var hostsDoc map[string]any |
| 149 | + if err := json.Unmarshal(b.HostsJSON, &hostsDoc); err != nil { |
| 150 | + return nil, fmt.Errorf("invalid hosts data in import bundle: %w", err) |
| 151 | + } |
| 152 | + |
| 153 | + return &b, nil |
| 154 | +} |
| 155 | + |
| 156 | +func atomicWrite(path string, data []byte, perm os.FileMode) error { |
| 157 | + tmp := path + ".tmp" |
| 158 | + if err := os.WriteFile(tmp, data, perm); err != nil { |
| 159 | + return err |
| 160 | + } |
| 161 | + return os.Rename(tmp, path) |
| 162 | +} |
0 commit comments