| 1 | //go:build linux |
| 2 | |
| 3 | package provisioner |
| 4 | |
| 5 | import ( |
| 6 | "context" |
| 7 | "flag" |
| 8 | "io" |
| 9 | "os" |
| 10 | |
| 11 | "golang.org/x/term" |
| 12 | ) |
| 13 | |
| 14 | func Run(args []string, out io.Writer) error { |
| 15 | if len(args) < 2 || args[0] != "provision" || (args[1] != "init" && args[1] != "backup" && args[1] != "restore" && args[1] != "enroll" && args[1] != "prepare") || out == nil { |
| 16 | return ErrRefused |
| 17 | } |
| 18 | flags := flag.NewFlagSet("oficina provision init", flag.ContinueOnError) |
| 19 | flags.SetOutput(io.Discard) |
| 20 | state := flags.String("state", "", "") |
| 21 | floor := flags.String("floor-dir", "", "") |
| 22 | output := flags.String("output", "", "") |
| 23 | input := flags.String("input", "", "") |
| 24 | passwordFD := flags.Int("password-fd", -1, "") |
| 25 | planFD := flags.Int("plan-fd", -1, "") |
| 26 | requestFD := flags.Int("request-fd", -1, "") |
| 27 | if flags.Parse(args[2:]) != nil || flags.NArg() != 0 || *state == "" || *floor == "" { |
| 28 | return ErrRefused |
| 29 | } |
| 30 | if args[1] == "enroll" || args[1] == "prepare" { |
| 31 | if *planFD < 3 || *planFD == *passwordFD || *input != "" || *output != "" { |
| 32 | return ErrRefused |
| 33 | } |
| 34 | } else if *planFD != -1 { |
| 35 | return ErrRefused |
| 36 | } |
| 37 | var privateOutput *requestOutput |
| 38 | if args[1] == "prepare" { |
| 39 | var err error |
| 40 | privateOutput, err = privateRequestOutput(*requestFD, *planFD, *passwordFD) |
| 41 | if err != nil { |
| 42 | return err |
| 43 | } |
| 44 | defer privateOutput.Close() |
| 45 | } else if *requestFD != -1 { |
| 46 | return ErrRefused |
| 47 | } |
| 48 | password, e := privatePassword(*passwordFD) |
| 49 | if e != nil { |
| 50 | return e |
| 51 | } |
| 52 | defer clear(password) |
| 53 | var info any |
| 54 | switch args[1] { |
| 55 | case "enroll", "prepare": |
| 56 | file := os.NewFile(uintptr(*planFD), "private-plan") |
| 57 | if file == nil { |
| 58 | return ErrRefused |
| 59 | } |
| 60 | raw, err := io.ReadAll(io.LimitReader(file, (64<<10)+1)) |
| 61 | file.Close() |
| 62 | if err != nil || len(raw) > 64<<10 { |
| 63 | return ErrRefused |
| 64 | } |
| 65 | if args[1] == "enroll" { |
| 66 | info, e = EnrollPlan(*state, *floor, password, raw) |
| 67 | } else { |
| 68 | info, e = prepareRequest(context.Background(), *state, *floor, password, raw, privateOutput) |
| 69 | } |
| 70 | clear(raw) |
| 71 | case "init": |
| 72 | if *output != "" || *input != "" { |
| 73 | return ErrRefused |
| 74 | } |
| 75 | info, e = Initialize(*state, *floor, password) |
| 76 | case "backup": |
| 77 | if *output == "" || *input != "" { |
| 78 | return ErrRefused |
| 79 | } |
| 80 | info, e = Backup(*state, *floor, *output, password) |
| 81 | case "restore": |
| 82 | if *input == "" || *output != "" { |
| 83 | return ErrRefused |
| 84 | } |
| 85 | info, e = Restore(*state, *floor, *input, password) |
| 86 | } |
| 87 | if e != nil { |
| 88 | return e |
| 89 | } |
| 90 | raw, e := canonicalJSON(info) |
| 91 | if e != nil { |
| 92 | return e |
| 93 | } |
| 94 | if _, e = out.Write(append(raw, '\n')); e != nil { |
| 95 | return ErrUnavailable |
| 96 | } |
| 97 | return nil |
| 98 | } |
| 99 | func privatePassword(fd int) ([]byte, error) { |
| 100 | if fd >= 3 { |
| 101 | f := os.NewFile(uintptr(fd), "private-password") |
| 102 | if f == nil { |
| 103 | return nil, ErrRefused |
| 104 | } |
| 105 | defer f.Close() |
| 106 | password, e := io.ReadAll(io.LimitReader(f, 1025)) |
| 107 | if e != nil || len(password) == 0 || len(password) > 1024 { |
| 108 | return nil, ErrRefused |
| 109 | } |
| 110 | return password, nil |
| 111 | } |
| 112 | if fd != -1 { |
| 113 | return nil, ErrRefused |
| 114 | } |
| 115 | tty, e := os.OpenFile("/dev/tty", os.O_RDWR, 0) |
| 116 | if e != nil { |
| 117 | return nil, ErrRefused |
| 118 | } |
| 119 | defer tty.Close() |
| 120 | if !term.IsTerminal(int(tty.Fd())) { |
| 121 | return nil, ErrRefused |
| 122 | } |
| 123 | if _, e = tty.WriteString("Passphrase: "); e != nil { |
| 124 | return nil, ErrUnavailable |
| 125 | } |
| 126 | password, e := term.ReadPassword(int(tty.Fd())) |
| 127 | tty.WriteString("\n") |
| 128 | if e != nil || len(password) == 0 || len(password) > 1024 { |
| 129 | clear(password) |
| 130 | return nil, ErrRefused |
| 131 | } |
| 132 | return password, nil |
| 133 | } |
| 134 | |
amadan