feat: add AesGcmEncrypt and AesGcmDecrypt in cryptor package

cryptor/crypto.go

@@ -244,6 +244,56 @@ func AesOfbDecrypt(data, key []byte) []byte {
 	return decrypted
 }
 
+// AesGcmEncrypt encrypt data with key use AES GCM algorithm
+// Play: todo
+func AesGcmEncrypt(data, key []byte) []byte {
+	block, err := aes.NewCipher(key)
+	if err != nil {
+		panic(err)
+	}
+
+	gcm, err := cipher.NewGCM(block)
+	if err != nil {
+		panic(err)
+	}
+
+	nonce := make([]byte, gcm.NonceSize())
+	if _, err = io.ReadFull(rand.Reader, nonce); err != nil {
+		panic(err)
+	}
+
+	ciphertext := gcm.Seal(nonce, nonce, data, nil)
+
+	return ciphertext
+}
+
+// AesGcmDecrypt decrypt data with key use AES GCM algorithm
+// Play: todo
+func AesGcmDecrypt(data, key []byte) []byte {
+	block, err := aes.NewCipher(key)
+	if err != nil {
+		panic(err)
+	}
+
+	gcm, err := cipher.NewGCM(block)
+	if err != nil {
+		panic(err)
+	}
+
+	nonceSize := gcm.NonceSize()
+	if len(data) < nonceSize {
+		panic("ciphertext too short")
+	}
+
+	nonce, ciphertext := data[:nonceSize], data[nonceSize:]
+	plaintext, err := gcm.Open(nil, nonce, ciphertext, nil)
+	if err != nil {
+		panic(err)
+	}
+
+	return plaintext
+}
+
 // DesEcbEncrypt encrypt data with key use DES ECB algorithm
 // len(key) should be 8.
 // Play: https://go.dev/play/p/8qivmPeZy4P

cryptor/crypto_example_test.go

@@ -129,6 +129,34 @@ func ExampleAesOfbDecrypt() {
 	// hello
 }
 
+func ExampleAesGcmEncrypt() {
+	data := "hello"
+	key := "abcdefghijklmnop"
+
+	encrypted := AesGcmEncrypt([]byte(data), []byte(key))
+
+	decrypted := AesGcmDecrypt(encrypted, []byte(key))
+
+	fmt.Println(string(decrypted))
+
+	// Output:
+	// hello
+}
+
+func ExampleAesGcmDecrypt() {
+	data := "hello"
+	key := "abcdefghijklmnop"
+
+	encrypted := AesGcmEncrypt([]byte(data), []byte(key))
+
+	decrypted := AesGcmDecrypt(encrypted, []byte(key))
+
+	fmt.Println(string(decrypted))
+
+	// Output:
+	// hello
+}
+
 func ExampleDesEcbEncrypt() {
 	data := "hello"
 	key := "abcdefgh"

cryptor/crypto_test.go

@@ -168,3 +168,17 @@ func TestRsaEncryptOAEP(t *testing.T) {
 	assert.IsNil(err)
 	assert.Equal("hello world", string(decrypted))
 }
+
+func TestAesGcmEncrypt(t *testing.T) {
+
+	t.Parallel()
+
+	data := "hello world"
+	key := "abcdefghijklmnop"
+
+	encrypted := AesGcmEncrypt([]byte(data), []byte(key))
+	decrypted := AesGcmDecrypt(encrypted, []byte(key))
+
+	assert := internal.NewAssert(t, "TestAesGcmEncrypt")
+	assert.Equal(data, string(decrypted))
+}