encryptionconfig: detect typos

Signed-off-by: Monis Khan <mok@microsoft.com>

staging/src/k8s.io/apiserver/pkg/server/options/encryptionconfig/config.go

@@ -130,7 +130,7 @@ func init() {
 	configScheme := runtime.NewScheme()
 	utilruntime.Must(apiserver.AddToScheme(configScheme))
 	utilruntime.Must(apiserverv1.AddToScheme(configScheme))
-	codecs = serializer.NewCodecFactory(configScheme)
+	codecs = serializer.NewCodecFactory(configScheme, serializer.EnableStrict)
 	envelopemetrics.RegisterMetrics()
 	storagevalue.RegisterMetrics()
 	metrics.RegisterMetrics()

staging/src/k8s.io/apiserver/pkg/server/options/encryptionconfig/config_test.go

@@ -232,6 +232,12 @@ func TestEncryptionProviderConfigCorrect(t *testing.T) {
 		t.Fatalf("should result in error while parsing configuration file: %s.\nThe file was:\n%s", err, invalidConfigWithAesGcm)
 	}
 
+	invalidConfigWithTypo := "testdata/invalid-configs/invalid-typo.yaml"
+	_, err = LoadEncryptionConfig(ctx, invalidConfigWithTypo, false, "")
+	if got, wantSubString := errString(err), `strict decoding error: unknown field "resources[0].providers[3].kms.pandas"`; !strings.Contains(got, wantSubString) {
+		t.Fatalf("should result in strict decode error while parsing configuration file %q:\ngot: %q\nwant substring: %q", invalidConfigWithTypo, got, wantSubString)
+	}
+
 	// Math for GracePeriod is explained at - https://github.com/kubernetes/kubernetes/blob/c9ed04762f94a319d7b1fb718dc345491a32bea6/staging/src/k8s.io/apiserver/pkg/server/options/encryptionconfig/config.go#L159-L163
 	expectedKMSCloseGracePeriod = 26 * time.Second
 	correctConfigWithAesCbcFirst := "testdata/valid-configs/aes-cbc-first.yaml"

staging/src/k8s.io/apiserver/pkg/server/options/encryptionconfig/testdata/invalid-configs/invalid-typo.yaml

@@ -0,0 +1,33 @@
+kind: EncryptionConfiguration
+apiVersion: apiserver.config.k8s.io/v1
+resources:
+  - resources:
+      - secrets
+    providers:
+      - aesgcm:
+          keys:
+            - name: key1
+              secret: c2VjcmV0IGlzIHNlY3VyZQ==
+            - name: key2
+              secret: dGhpcyBpcyBwYXNzd29yZA==
+      - secretbox:
+          keys:
+            - name: key1
+              secret: YWJjZGVmZ2hpamtsbW5vcHFyc3R1dnd4eXoxMjM0NTY=
+      - kms:
+          name: testprovider
+          endpoint: unix:///tmp/testprovider.sock
+          cachesize: 10
+      - kms:
+          apiVersion: v2
+          name: testproviderv2
+          endpoint: unix:///tmp/testprovider.sock
+          timeout: 10s
+          pandas: are the best  # true, but still a typo
+      - aescbc:
+          keys:
+            - name: key1
+              secret: c2VjcmV0IGlzIHNlY3VyZQ==
+            - name: key2
+              secret: dGhpcyBpcyBwYXNzd29yZA==
+      - identity: {}