| 1 | package main |
| 2 | |
| 3 | import ( |
| 4 | "encoding/json" |
| 5 | "net/http" |
| 6 | "strconv" |
| 7 | "strings" |
| 8 | "testing" |
| 9 | ) |
| 10 | |
| 11 | // sealLinkToken/openLinkToken round-trip, and a wrong key fails closed |
| 12 | // (GCM authentication, not string comparison, decides "invalid"). |
| 13 | func TestLinkTokenRoundTrip(t *testing.T) { |
| 14 | key := make([]byte, 32) |
| 15 | tok, err := sealLinkToken(key, "thread-abc", 42) |
| 16 | if err != nil { |
| 17 | t.Fatalf("seal: %v", err) |
| 18 | } |
| 19 | tid, mid, ok := openLinkToken(key, tok) |
| 20 | if !ok || tid != "thread-abc" || mid != 42 { |
| 21 | t.Fatalf("open: got tid=%q mid=%d ok=%v", tid, mid, ok) |
| 22 | } |
| 23 | otherKey := make([]byte, 32) |
| 24 | otherKey[0] = 1 |
| 25 | if _, _, ok := openLinkToken(otherKey, tok); ok { |
| 26 | t.Fatal("token opened under the wrong key") |
| 27 | } |
| 28 | if _, _, ok := openLinkToken(key, "not-a-real-token"); ok { |
| 29 | t.Fatal("garbage token should not open") |
| 30 | } |
| 31 | } |
| 32 | |
| 33 | // Two seals of the same pair produce different ciphertext (random nonce per |
| 34 | // seal) — links to the same message aren't correlatable by their bytes alone. |
| 35 | func TestLinkTokenNotCorrelatable(t *testing.T) { |
| 36 | key := make([]byte, 32) |
| 37 | a, _ := sealLinkToken(key, "thread-abc", 42) |
| 38 | b, _ := sealLinkToken(key, "thread-abc", 42) |
| 39 | if a == b { |
| 40 | t.Fatal("two seals of the same pair should not be identical") |
| 41 | } |
| 42 | } |
| 43 | |
| 44 | // End-to-end: mint a link as a thread member, resolve it back to the same |
| 45 | // ids. A non-member of the thread gets a generic not-found, same as an |
| 46 | // invalid token — the endpoint must not be a membership oracle. |
| 47 | func TestMintAndResolveMessageLink(t *testing.T) { |
| 48 | ts, srv := newTestServer(t) |
| 49 | |
| 50 | tokA, uidA, tidA := joinedMember(t, srv, "Alice") |
| 51 | tokB, _, _ := joinedMember(t, srv, "Bob") // a member of a different thread |
| 52 | |
| 53 | m, err := srv.db.insertMessage(tidA, "blob", uidA) |
| 54 | if err != nil { |
| 55 | t.Fatalf("insertMessage: %v", err) |
| 56 | } |
| 57 | |
| 58 | mint := func(tok, threadID string, msgID int64) (string, int) { |
| 59 | resp, err := http.Post( |
| 60 | ts.URL+"/api/messages/"+strconv.FormatInt(msgID, 10)+"/link?token="+tok, |
| 61 | "application/json", |
| 62 | strings.NewReader(`{"thread_id":"`+threadID+`"}`), |
| 63 | ) |
| 64 | if err != nil { |
| 65 | t.Fatalf("mint post: %v", err) |
| 66 | } |
| 67 | defer resp.Body.Close() |
| 68 | var out struct { |
| 69 | Token string `json:"token"` |
| 70 | } |
| 71 | json.NewDecoder(resp.Body).Decode(&out) |
| 72 | return out.Token, resp.StatusCode |
| 73 | } |
| 74 | resolve := func(tok, linkToken string) (string, int64, int) { |
| 75 | resp, err := http.Post(ts.URL+"/api/resolve-link?token="+tok, "application/json", |
| 76 | strings.NewReader(`{"token":"`+linkToken+`"}`)) |
| 77 | if err != nil { |
| 78 | t.Fatalf("resolve post: %v", err) |
| 79 | } |
| 80 | defer resp.Body.Close() |
| 81 | var out struct { |
| 82 | ThreadID string `json:"thread_id"` |
| 83 | MessageID int64 `json:"message_id"` |
| 84 | } |
| 85 | json.NewDecoder(resp.Body).Decode(&out) |
| 86 | return out.ThreadID, out.MessageID, resp.StatusCode |
| 87 | } |
| 88 | |
| 89 | linkTok, code := mint(tokA, tidA, m.ID) |
| 90 | if code != http.StatusOK || linkTok == "" { |
| 91 | t.Fatalf("mint: status=%d token=%q", code, linkTok) |
| 92 | } |
| 93 | |
| 94 | if tid, mid, code := resolve(tokA, linkTok); code != http.StatusOK || tid != tidA || mid != m.ID { |
| 95 | t.Fatalf("resolve as member: status=%d tid=%q mid=%d", code, tid, mid) |
| 96 | } |
| 97 | |
| 98 | if _, _, code := resolve(tokB, linkTok); code != http.StatusNotFound { |
| 99 | t.Fatalf("resolve as non-member: want 404, got %d", code) |
| 100 | } |
| 101 | if _, _, code := resolve(tokA, "garbage"); code != http.StatusNotFound { |
| 102 | t.Fatalf("resolve garbage token: want 404, got %d", code) |
| 103 | } |
| 104 | |
| 105 | // Bob can't mint a link for a message in a thread he's not in. |
| 106 | if _, code := mint(tokB, tidA, m.ID); code != http.StatusForbidden { |
| 107 | t.Fatalf("mint as non-member: want 403, got %d", code) |
| 108 | } |
| 109 | } |
| 110 | |
amadan