| 1 | package main |
| 2 | |
| 3 | import ( |
| 4 | "bytes" |
| 5 | "context" |
| 6 | "encoding/json" |
| 7 | "errors" |
| 8 | "flag" |
| 9 | "fmt" |
| 10 | "io" |
| 11 | "log" |
| 12 | "os" |
| 13 | "path/filepath" |
| 14 | "time" |
| 15 | |
| 16 | "github.com/carlosframework/platform/internal/historyreadback" |
| 17 | "github.com/carlosframework/platform/internal/hostactors" |
| 18 | "github.com/carlosframework/platform/internal/release" |
| 19 | "github.com/carlosframework/platform/internal/safefile" |
| 20 | ) |
| 21 | |
| 22 | const historyUsage = "usage: carlos proof history <status|reconstruct|retire|resume> --bucket <bucket> --state <file> [--box <box> --enrollment <id> --account <sqid> --app <app> --host <host>] [--input <file>] [--wait <duration>]" |
| 23 | const historyPending = "History readback is not complete. Resume with the same --state file. Last result: %v" |
| 24 | |
| 25 | type historyConnect func(string, bool) (hostactors.Directory, release.Signer, error) |
| 26 | |
| 27 | func runHistory(args []string) { |
| 28 | err := historyCommand(context.Background(), args, func(bucket string, resume bool) (hostactors.Directory, release.Signer, error) { |
| 29 | if configured := os.Getenv("CARLOS_DEPLOYMENT_BUCKET"); configured != "" && configured != bucket { |
| 30 | return hostactors.Directory{}, release.Signer{}, errors.New("--bucket must match CARLOS_DEPLOYMENT_BUCKET") |
| 31 | } |
| 32 | d := hostactors.Directory{Store: openStore(), PublicKey: publicKey(), Bucket: bucket} |
| 33 | if resume { |
| 34 | return d, release.Signer{}, nil |
| 35 | } |
| 36 | return d, releaseSigner(), nil |
| 37 | }, stdout) |
| 38 | if err != nil && !errors.Is(err, flag.ErrHelp) { |
| 39 | log.Fatal(err) |
| 40 | } |
| 41 | } |
| 42 | |
| 43 | func historyCommand(ctx context.Context, args []string, connect historyConnect, out io.Writer) error { |
| 44 | return historyCommandWithSave(ctx, args, connect, out, historySave) |
| 45 | } |
| 46 | |
| 47 | func historyCommandWithSave(ctx context.Context, args []string, connect historyConnect, out io.Writer, save func(string, historyreadback.Operation) error) error { |
| 48 | if len(args) == 0 { |
| 49 | return errors.New(historyUsage) |
| 50 | } |
| 51 | verb := args[0] |
| 52 | if verb != "status" && verb != "reconstruct" && verb != "retire" && verb != "resume" { |
| 53 | return errors.New(historyUsage) |
| 54 | } |
| 55 | fs := flag.NewFlagSet("proof history "+verb, flag.ContinueOnError) |
| 56 | fs.SetOutput(out) |
| 57 | bucket := fs.String("bucket", os.Getenv("CARLOS_DEPLOYMENT_BUCKET"), "deployment bucket named in the signed box roster") |
| 58 | box := fs.String("box", "", "box named in the signed roster") |
| 59 | enrollment := fs.String("enrollment", "", "current box enrollment ID") |
| 60 | account := fs.String("account", "", "account sqid") |
| 61 | app := fs.String("app", "", "app name") |
| 62 | host := fs.String("host", "", "canonical instance hostname") |
| 63 | state := fs.String("state", "", "save the signed operation here before delivery; resume reuses this file") |
| 64 | input := fs.String("input", "", "JSON reconstruction or retirement decision to sign") |
| 65 | wait := fs.Duration("wait", 30*time.Second, "how long to wait for verified root readback") |
| 66 | if err := fs.Parse(args[1:]); err != nil { |
| 67 | return err |
| 68 | } |
| 69 | resume := verb == "resume" |
| 70 | scope := historyreadback.Scope{Bucket: *bucket, Box: *box, Enrollment: *enrollment, Binding: release.HistoryBinding{Account: *account, App: *app, Host: *host}} |
| 71 | if fs.NArg() != 0 || *bucket == "" || *state == "" || *wait <= 0 || (resume && (*input != "" || *box != "" || *enrollment != "" || *account != "" || *app != "" || *host != "")) || (!resume && (*box == "" || *enrollment == "" || *account == "" || *app == "" || *host == "")) || ((verb == "reconstruct" || verb == "retire") != (*input != "")) { |
| 72 | return errors.New(historyUsage) |
| 73 | } |
| 74 | ctx, cancel := context.WithTimeout(ctx, *wait) |
| 75 | defer cancel() |
| 76 | var op historyreadback.Operation |
| 77 | var reconstruction *release.HistoryReconstruction |
| 78 | var retirement *release.HistoryRecoveryRetirement |
| 79 | if resume { |
| 80 | if err := historyReadFile(*state, &op, true); err != nil { |
| 81 | return err |
| 82 | } |
| 83 | } else if verb == "reconstruct" { |
| 84 | reconstruction = &release.HistoryReconstruction{} |
| 85 | if err := historyReadFile(*input, reconstruction, false); err != nil { |
| 86 | return err |
| 87 | } |
| 88 | } else if verb == "retire" { |
| 89 | retirement = &release.HistoryRecoveryRetirement{} |
| 90 | if err := historyReadFile(*input, retirement, false); err != nil { |
| 91 | return err |
| 92 | } |
| 93 | } |
| 94 | d, signer, err := connect(*bucket, resume) |
| 95 | if err != nil { |
| 96 | return err |
| 97 | } |
| 98 | if !resume { |
| 99 | op, err = historyreadback.PrepareOperation(ctx, d, signer, scope, reconstruction, retirement, time.Now()) |
| 100 | if err != nil { |
| 101 | return err |
| 102 | } |
| 103 | if err = save(*state, op); err != nil { |
| 104 | return err |
| 105 | } |
| 106 | } |
| 107 | if err = op.Deliver(ctx, d, time.Now()); err != nil { |
| 108 | return err |
| 109 | } |
| 110 | for { |
| 111 | receipt, readErr := op.Read(ctx, d, time.Now()) |
| 112 | if readErr == nil { |
| 113 | enc := json.NewEncoder(out) |
| 114 | enc.SetIndent("", " ") |
| 115 | return enc.Encode(receipt) |
| 116 | } |
| 117 | timer := time.NewTimer(time.Second) |
| 118 | select { |
| 119 | case <-ctx.Done(): |
| 120 | timer.Stop() |
| 121 | return fmt.Errorf(historyPending, readErr) |
| 122 | case <-timer.C: |
| 123 | } |
| 124 | } |
| 125 | } |
| 126 | |
| 127 | func historyReadFile(path string, dst any, repair bool) error { |
| 128 | f, err := safefile.OpenFile(path, os.O_RDONLY, 0) |
| 129 | if err != nil { |
| 130 | return err |
| 131 | } |
| 132 | defer f.Close() |
| 133 | raw, err := io.ReadAll(io.LimitReader(f, 3*release.MaxRootEnvelopeBytes+1)) |
| 134 | if err != nil { |
| 135 | return err |
| 136 | } |
| 137 | if len(raw) > 3*release.MaxRootEnvelopeBytes { |
| 138 | return os.ErrPermission |
| 139 | } |
| 140 | dec := json.NewDecoder(bytes.NewReader(raw)) |
| 141 | dec.DisallowUnknownFields() |
| 142 | if err = dec.Decode(dst); err != nil { |
| 143 | return err |
| 144 | } |
| 145 | if err = dec.Decode(new(any)); err != io.EOF { |
| 146 | return os.ErrPermission |
| 147 | } |
| 148 | if repair { |
| 149 | return historySync(f, path) |
| 150 | } |
| 151 | return nil |
| 152 | } |
| 153 | |
| 154 | func historySave(path string, op historyreadback.Operation) error { |
| 155 | raw, err := json.Marshal(op) |
| 156 | if err != nil { |
| 157 | return err |
| 158 | } |
| 159 | f, err := safefile.OpenFile(path, os.O_WRONLY|os.O_CREATE|os.O_EXCL, 0600) |
| 160 | if err != nil { |
| 161 | return err |
| 162 | } |
| 163 | defer f.Close() |
| 164 | if n, err := f.Write(raw); err != nil { |
| 165 | return err |
| 166 | } else if n != len(raw) { |
| 167 | return io.ErrShortWrite |
| 168 | } |
| 169 | return historySync(f, path) |
| 170 | } |
| 171 | |
| 172 | func historySync(f *os.File, path string) error { |
| 173 | if err := f.Sync(); err != nil { |
| 174 | return err |
| 175 | } |
| 176 | parent, err := safefile.OpenDir(filepath.Dir(path)) |
| 177 | if err != nil { |
| 178 | return err |
| 179 | } |
| 180 | defer parent.Close() |
| 181 | current, err := safefile.OpenFile(path, os.O_RDONLY, 0) |
| 182 | if err != nil { |
| 183 | return err |
| 184 | } |
| 185 | defer current.Close() |
| 186 | a, err := f.Stat() |
| 187 | if err != nil { |
| 188 | return err |
| 189 | } |
| 190 | b, err := current.Stat() |
| 191 | if err != nil { |
| 192 | return err |
| 193 | } |
| 194 | if !os.SameFile(a, b) { |
| 195 | return os.ErrPermission |
| 196 | } |
| 197 | return parent.Sync() |
| 198 | } |
| 199 | |
amadan