| 1 | package recovery |
| 2 | |
| 3 | import ( |
| 4 | "crypto/sha256" |
| 5 | "encoding/hex" |
| 6 | "encoding/json" |
| 7 | "fmt" |
| 8 | "strings" |
| 9 | ) |
| 10 | |
| 11 | // CallFingerprint builds a one-shot authorization fingerprint from the |
| 12 | // tool name, resolved subject/target, arguments, and preview summary. |
| 13 | // A continue decision only authorizes a later call whose fingerprint matches. |
| 14 | func CallFingerprint(tool, subject, preview string, args json.RawMessage) string { |
| 15 | tool = strings.TrimSpace(tool) |
| 16 | subject = strings.TrimSpace(subject) |
| 17 | preview = strings.TrimSpace(preview) |
| 18 | normArgs := normalizeArgs(args) |
| 19 | h := sha256.New() |
| 20 | _, _ = fmt.Fprintf(h, "tool=%s\n", tool) |
| 21 | _, _ = fmt.Fprintf(h, "subject=%s\n", subject) |
| 22 | _, _ = fmt.Fprintf(h, "preview=%s\n", preview) |
| 23 | _, _ = fmt.Fprintf(h, "args=%s\n", normArgs) |
| 24 | return hex.EncodeToString(h.Sum(nil)) |
| 25 | } |
| 26 | |
| 27 | func normalizeArgs(args json.RawMessage) string { |
| 28 | if len(args) == 0 { |
| 29 | return "" |
| 30 | } |
| 31 | var v any |
| 32 | if err := json.Unmarshal(args, &v); err != nil { |
| 33 | return string(args) |
| 34 | } |
| 35 | b, err := json.Marshal(v) |
| 36 | if err != nil { |
| 37 | return string(args) |
| 38 | } |
| 39 | return string(b) |
| 40 | } |
| 41 | |
| 42 | // ArgsSummary produces a short display string for diagnostics. |
| 43 | func ArgsSummary(args json.RawMessage, max int) string { |
| 44 | if max <= 0 { |
| 45 | max = 200 |
| 46 | } |
| 47 | s := strings.TrimSpace(string(args)) |
| 48 | if s == "" { |
| 49 | return "" |
| 50 | } |
| 51 | var compact map[string]any |
| 52 | if err := json.Unmarshal(args, &compact); err == nil { |
| 53 | if cmd, ok := compact["command"].(string); ok && strings.TrimSpace(cmd) != "" { |
| 54 | s = strings.TrimSpace(cmd) |
| 55 | } else if path, ok := compact["path"].(string); ok && strings.TrimSpace(path) != "" { |
| 56 | s = strings.TrimSpace(path) |
| 57 | } else if p, ok := compact["file_path"].(string); ok && strings.TrimSpace(p) != "" { |
| 58 | s = strings.TrimSpace(p) |
| 59 | } |
| 60 | } |
| 61 | s = strings.Join(strings.Fields(s), " ") |
| 62 | if len(s) > max { |
| 63 | return s[:max] + "…" |
| 64 | } |
| 65 | return s |
| 66 | } |
| 67 |