func verifySha256()

in internal/core/startup/installers.go [322:367]
40 lines of code
9 McCabe index (conditional complexity)

func verifySha256(checksumFile string, checkSumUrl string, filePath string) {
	err := utils.DownloadFile(checksumFile, checkSumUrl, getInternalAuth(), nil)
	if err != nil {
		log.Fatalf("Error while downloading checksum for IDE: %v", err)
	}

	defer func(filePath string) {
		err = os.Remove(filePath)
		if err != nil {
			log.Warning("Error while removing temporary file: " + err.Error())
		}
	}(checksumFile)

	checksum, err := os.ReadFile(checksumFile)
	if err != nil {
		log.Fatalf("Error occurred during reading checksum file: %v", err)
	}

	file, err := os.Open(filePath)
	if err != nil {
		log.Fatalf("Error while opening IDE archive: %v", err)
	}

	defer func(file *os.File) {
		err := file.Close()
		if err != nil {
			log.Fatalf("Error while closing IDE archive: %v", err)
		}
	}(file)

	h := sha256.New()
	if _, err := io.Copy(h, file); err != nil {
		log.Fatalf("Error while computing checksum of IDE archive: %v", err)
	}

	actual := hex.EncodeToString(h.Sum(nil))
	expected := strings.SplitN(string(checksum), " ", 2)[0]
	if actual != expected {
		err = os.Remove(filePath)
		if err != nil {
			log.Warning("Error while removing temporary file: " + err.Error())
		}
		log.Fatalf("Checksums doesn't match. Expected: %s, Actual: %s", expected, actual)
	}
	log.Info("Checksum of downloaded IDE was verified")
}