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| 1 | +// Copyright Envoy Gateway Authors |
| 2 | +// SPDX-License-Identifier: Apache-2.0 |
| 3 | +// The full text of the Apache license is available in the LICENSE file at |
| 4 | +// the root of the repo. |
| 5 | + |
| 6 | +package host |
| 7 | + |
| 8 | +import ( |
| 9 | + "io" |
| 10 | + "os" |
| 11 | + "path/filepath" |
| 12 | + "testing" |
| 13 | + |
| 14 | + "github.com/stretchr/testify/require" |
| 15 | + |
| 16 | + "github.com/envoyproxy/gateway/internal/envoygateway/config" |
| 17 | + "github.com/envoyproxy/gateway/internal/infrastructure/common" |
| 18 | + "github.com/envoyproxy/gateway/internal/utils/file" |
| 19 | +) |
| 20 | + |
| 21 | +func TestMaybeGenerateCertificates(t *testing.T) { |
| 22 | + cfg, err := config.New(io.Discard, io.Discard) |
| 23 | + require.NoError(t, err) |
| 24 | + |
| 25 | + certFiles := []string{"ca.crt", "tls.crt", "tls.key"} |
| 26 | + |
| 27 | + t.Run("all_files_exist", func(t *testing.T) { |
| 28 | + tmpDir := t.TempDir() |
| 29 | + certPath := filepath.Join(tmpDir, "envoy") |
| 30 | + |
| 31 | + // Create directory and dummy files |
| 32 | + require.NoError(t, os.MkdirAll(certPath, 0o750)) |
| 33 | + for _, filename := range certFiles { |
| 34 | + fpath := filepath.Join(certPath, filename) |
| 35 | + require.NoError(t, os.WriteFile(fpath, []byte("dummy"), 0o600)) |
| 36 | + } |
| 37 | + |
| 38 | + err := maybeGenerateCertificates(cfg, certPath) |
| 39 | + require.NoError(t, err) |
| 40 | + |
| 41 | + // Verify files still exist and unchanged size |
| 42 | + for _, filename := range certFiles { |
| 43 | + data, err := os.ReadFile(filepath.Join(certPath, filename)) |
| 44 | + require.NoError(t, err) |
| 45 | + require.Len(t, data, 5) // "dummy" |
| 46 | + } |
| 47 | + }) |
| 48 | + |
| 49 | + t.Run("missing_files", func(t *testing.T) { |
| 50 | + tmpDir := t.TempDir() |
| 51 | + certPath := filepath.Join(tmpDir, "envoy") |
| 52 | + |
| 53 | + err := maybeGenerateCertificates(cfg, certPath) |
| 54 | + require.NoError(t, err) |
| 55 | + |
| 56 | + // Verify directory created |
| 57 | + info, err := os.Stat(certPath) |
| 58 | + require.NoError(t, err) |
| 59 | + require.True(t, info.IsDir()) |
| 60 | + |
| 61 | + // Verify all files created and non-empty |
| 62 | + for _, filename := range certFiles { |
| 63 | + data, err := os.ReadFile(filepath.Join(certPath, filename)) |
| 64 | + require.NoError(t, err) |
| 65 | + require.NotEmpty(t, data, filename) |
| 66 | + } |
| 67 | + }) |
| 68 | + |
| 69 | + t.Run("partial_files_missing", func(t *testing.T) { |
| 70 | + tmpDir := t.TempDir() |
| 71 | + certPath := filepath.Join(tmpDir, "envoy") |
| 72 | + |
| 73 | + require.NoError(t, os.MkdirAll(certPath, 0o750)) |
| 74 | + |
| 75 | + // Create only one file |
| 76 | + require.NoError(t, os.WriteFile(filepath.Join(certPath, "ca.crt"), []byte("dummy"), 0o600)) |
| 77 | + |
| 78 | + err := maybeGenerateCertificates(cfg, certPath) |
| 79 | + require.NoError(t, err) |
| 80 | + |
| 81 | + // Verify all files created and non-empty |
| 82 | + for _, filename := range certFiles { |
| 83 | + data, err := os.ReadFile(filepath.Join(certPath, filename)) |
| 84 | + require.NoError(t, err) |
| 85 | + require.NotEmpty(t, data, filename) |
| 86 | + } |
| 87 | + }) |
| 88 | + |
| 89 | + t.Run("cert_generation_fails", func(t *testing.T) { |
| 90 | + tmpDir := t.TempDir() |
| 91 | + // This tests mkdir fail by making parent unwritable |
| 92 | + unwritableDir := filepath.Join(tmpDir, "unwritable") |
| 93 | + require.NoError(t, os.Mkdir(unwritableDir, 0o555)) // Read-only |
| 94 | + |
| 95 | + badCertPath := filepath.Join(unwritableDir, "envoy") |
| 96 | + err := maybeGenerateCertificates(cfg, badCertPath) |
| 97 | + require.ErrorContains(t, err, "failed to create cert directory") |
| 98 | + }) |
| 99 | +} |
| 100 | + |
| 101 | +func TestCreateSdsConfig(t *testing.T) { |
| 102 | + t.Run("success", func(t *testing.T) { |
| 103 | + dir := t.TempDir() |
| 104 | + // Create required cert files |
| 105 | + require.NoError(t, file.Write("test ca", filepath.Join(dir, XdsTLSCaFilename))) |
| 106 | + require.NoError(t, file.Write("test cert", filepath.Join(dir, XdsTLSCertFilename))) |
| 107 | + require.NoError(t, file.Write("test key", filepath.Join(dir, XdsTLSKeyFilename))) |
| 108 | + |
| 109 | + err := createSdsConfig(dir) |
| 110 | + require.NoError(t, err) |
| 111 | + |
| 112 | + // Verify CA config was created |
| 113 | + caConfigPath := filepath.Join(dir, common.SdsCAFilename) |
| 114 | + actualCAConfig, err := os.ReadFile(caConfigPath) |
| 115 | + require.NoError(t, err) |
| 116 | + require.NotEmpty(t, actualCAConfig) |
| 117 | + |
| 118 | + // Verify cert config was created |
| 119 | + certConfigPath := filepath.Join(dir, common.SdsCertFilename) |
| 120 | + actualCertConfig, err := os.ReadFile(certConfigPath) |
| 121 | + require.NoError(t, err) |
| 122 | + require.NotEmpty(t, actualCertConfig) |
| 123 | + }) |
| 124 | + |
| 125 | + t.Run("error_writing_ca_config", func(t *testing.T) { |
| 126 | + // Use invalid path to force file.Write to fail |
| 127 | + invalidDir := filepath.Join("/", "nonexistent", "invalid", "path") |
| 128 | + err := createSdsConfig(invalidDir) |
| 129 | + require.Error(t, err) |
| 130 | + }) |
| 131 | +} |
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