| 1 | package main |
| 2 | |
| 3 | import ( |
| 4 | "bytes" |
| 5 | "context" |
| 6 | "os" |
| 7 | "path/filepath" |
| 8 | "testing" |
| 9 | |
| 10 | "golang.org/x/crypto/acme/autocert" |
| 11 | ) |
| 12 | |
| 13 | // testCertCacheConformance is the contract every cache backend (dir today, S3 |
| 14 | // later) must satisfy — autocert and the wildcard manager rely on all three: |
| 15 | // Get/Put round-trip, ErrCacheMiss (not a bare error) for an absent key, and |
| 16 | // idempotent Delete. |
| 17 | func testCertCacheConformance(t *testing.T, cache autocert.Cache) { |
| 18 | t.Helper() |
| 19 | ctx := context.Background() |
| 20 | |
| 21 | if _, err := cache.Get(ctx, "absent"); err != autocert.ErrCacheMiss { |
| 22 | t.Fatalf("Get(absent) = %v, want ErrCacheMiss", err) |
| 23 | } |
| 24 | want := []byte("pem-bytes") |
| 25 | if err := cache.Put(ctx, "chat.example.com", want); err != nil { |
| 26 | t.Fatal(err) |
| 27 | } |
| 28 | if got, err := cache.Get(ctx, "chat.example.com"); err != nil || !bytes.Equal(got, want) { |
| 29 | t.Fatalf("Get after Put = %q, %v", got, err) |
| 30 | } |
| 31 | // Overwrite is the renewal path. |
| 32 | if err := cache.Put(ctx, "chat.example.com", []byte("renewed")); err != nil { |
| 33 | t.Fatal(err) |
| 34 | } |
| 35 | if got, _ := cache.Get(ctx, "chat.example.com"); string(got) != "renewed" { |
| 36 | t.Fatalf("overwrite lost: %q", got) |
| 37 | } |
| 38 | if err := cache.Delete(ctx, "chat.example.com"); err != nil { |
| 39 | t.Fatal(err) |
| 40 | } |
| 41 | if _, err := cache.Get(ctx, "chat.example.com"); err != autocert.ErrCacheMiss { |
| 42 | t.Fatalf("Get after Delete = %v, want ErrCacheMiss", err) |
| 43 | } |
| 44 | if err := cache.Delete(ctx, "never-existed"); err != nil { |
| 45 | t.Fatalf("Delete(absent) = %v, want nil", err) |
| 46 | } |
| 47 | } |
| 48 | |
| 49 | func TestNewCertCacheDirBackend(t *testing.T) { |
| 50 | dir := t.TempDir() |
| 51 | t.Setenv("LCHAT_CERT_CACHE", "") // unset = dir |
| 52 | cache, err := newCertCache(dir) |
| 53 | if err != nil { |
| 54 | t.Fatal(err) |
| 55 | } |
| 56 | testCertCacheConformance(t, cache) |
| 57 | |
| 58 | // The dir backend must be byte-identical to the pre-seam layout: a key is |
| 59 | // a plain file name inside the acme cache dir, 0600 (every entry may hold |
| 60 | // private key material) — an existing /data/acme keeps working over a |
| 61 | // restart with no migration. |
| 62 | ctx := context.Background() |
| 63 | if err := cache.Put(ctx, "chat.example.com", []byte("pem")); err != nil { |
| 64 | t.Fatal(err) |
| 65 | } |
| 66 | path := filepath.Join(dir, "chat.example.com") |
| 67 | if raw, err := os.ReadFile(path); err != nil || string(raw) != "pem" { |
| 68 | t.Fatalf("on-disk layout drifted: %q, %v", raw, err) |
| 69 | } |
| 70 | if fi, err := os.Stat(path); err != nil || fi.Mode().Perm() != 0o600 { |
| 71 | t.Fatalf("cert file mode = %v, err %v (want 0600)", fi.Mode(), err) |
| 72 | } |
| 73 | // And the reverse: a cert file an older binary wrote directly is served. |
| 74 | if err := os.WriteFile(filepath.Join(dir, "old.example.com"), []byte("old"), 0o600); err != nil { |
| 75 | t.Fatal(err) |
| 76 | } |
| 77 | if raw, err := cache.Get(ctx, "old.example.com"); err != nil || string(raw) != "old" { |
| 78 | t.Fatalf("pre-seam file not readable through the cache: %q, %v", raw, err) |
| 79 | } |
| 80 | } |
| 81 | |
| 82 | func TestNewCertCacheEnvSelection(t *testing.T) { |
| 83 | t.Setenv("LCHAT_CERT_CACHE", "dir") |
| 84 | if _, err := newCertCache(t.TempDir()); err != nil { |
| 85 | t.Fatalf("explicit dir backend: %v", err) |
| 86 | } |
| 87 | // s3 is reserved: refusing to start beats a router silently minting certs |
| 88 | // into a local dir the rest of a pool can't see. |
| 89 | t.Setenv("LCHAT_CERT_CACHE", "s3") |
| 90 | if _, err := newCertCache(t.TempDir()); err == nil { |
| 91 | t.Fatal("s3 backend accepted before it exists") |
| 92 | } |
| 93 | t.Setenv("LCHAT_CERT_CACHE", "floppy") |
| 94 | if _, err := newCertCache(t.TempDir()); err == nil { |
| 95 | t.Fatal("unknown backend accepted") |
| 96 | } |
| 97 | } |
| 98 | |
amadan