test: add unit-tests for spiffe utils

Signed-off-by: AhmedGrati <ahmedgrati1999@gmail.com>

pkg/utils/spiffe/spiffe_test.go

@@ -15,3 +15,108 @@ limitations under the License.
 */
 
 package utils
+
+import (
+	"crypto"
+	"crypto/ecdsa"
+	"crypto/elliptic"
+	"crypto/rand"
+	"crypto/rsa"
+	b64 "encoding/base64"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+	"sigs.k8s.io/node-feature-discovery/pkg/apis/nfd/v1alpha1"
+)
+
+func mockNFRSpec() v1alpha1.NodeFeatureSpec {
+	return v1alpha1.NodeFeatureSpec{
+		Features: v1alpha1.Features{
+			Flags: map[string]v1alpha1.FlagFeatureSet{
+				"test": {
+					Elements: map[string]v1alpha1.Nil{
+						"test2": {},
+					},
+				},
+			},
+		},
+	}
+}
+
+func mockWorkerECDSAPrivateKey() (*ecdsa.PrivateKey, *ecdsa.PublicKey) {
+	privateKey, _ := ecdsa.GenerateKey(elliptic.P384(), rand.Reader)
+	return privateKey, &privateKey.PublicKey
+}
+
+func mockWorkerRSAPrivateKey() (*rsa.PrivateKey, *rsa.PublicKey) {
+	privateKey, _ := rsa.GenerateKey(rand.Reader, 4096)
+	return privateKey, &privateKey.PublicKey
+}
+
+func TestVerify(t *testing.T) {
+	rsaPrivateKey, rsaPublicKey := mockWorkerRSAPrivateKey()
+	ecdsaPrivateKey, ecdsaPublicKey := mockWorkerECDSAPrivateKey()
+	spec := mockNFRSpec()
+
+	tc := []struct {
+		name       string
+		privateKey crypto.Signer
+		publicKey  crypto.PublicKey
+		wantErr    bool
+	}{
+		{
+			name:       "RSA Keys",
+			privateKey: rsaPrivateKey,
+			publicKey:  rsaPublicKey,
+			wantErr:    true,
+		},
+		{
+			name:       "ECDSA Keys",
+			privateKey: ecdsaPrivateKey,
+			publicKey:  ecdsaPublicKey,
+			wantErr:    false,
+		},
+	}
+
+	for _, tt := range tc {
+		signedData, err := SignData(spec, tt.privateKey)
+		assert.NoError(t, err)
+
+		isVerified, err := VerifyDataSignature(spec, b64.StdEncoding.EncodeToString(signedData), tt.privateKey, tt.publicKey)
+		assert.NoError(t, err)
+		assert.True(t, isVerified)
+
+		signedData = append(signedData, "random"...)
+		isVerified, err = VerifyDataSignature(spec, b64.StdEncoding.EncodeToString(signedData), tt.privateKey, tt.publicKey)
+		if tt.wantErr {
+			assert.Error(t, err)
+		} else {
+			assert.False(t, isVerified)
+		}
+	}
+}
+
+func TestSignData(t *testing.T) {
+	rsaPrivateKey, _ := mockWorkerRSAPrivateKey()
+	ecdsaPrivateKey, _ := mockWorkerECDSAPrivateKey()
+	spec := mockNFRSpec()
+
+	tc := []struct {
+		name       string
+		privateKey crypto.Signer
+	}{
+		{
+			name:       "RSA Keys",
+			privateKey: rsaPrivateKey,
+		},
+		{
+			name:       "ECDSA Keys",
+			privateKey: ecdsaPrivateKey,
+		},
+	}
+
+	for _, tt := range tc {
+		_, err := SignData(spec, tt.privateKey)
+		assert.NoError(t, err)
+	}
+}