Javascript 如何在Node JS中编写这个Java加密函数的类似功能

这是java中用于加密的函数

 public static String encryptionFunction(String fieldValue, String pemFileLocation) {
    try {

        // Read key from file
        String strKeyPEM = "";
        BufferedReader br = new BufferedReader(new FileReader(pemFileLocation));
        String line;
        while ((line = br.readLine()) != null) {
            strKeyPEM += line + "\n";
        }
        br.close();
        String publicKeyPEM = strKeyPEM;
        System.out.println(publicKeyPEM);
        publicKeyPEM = publicKeyPEM.replace("-----BEGIN PUBLIC KEY-----\n", "");
        publicKeyPEM = publicKeyPEM.replace("-----END PUBLIC KEY-----", "").replaceAll("\\s", "");;
        byte[] encoded = Base64.getDecoder().decode(publicKeyPEM);
        // byte[] encoded = Base64.decode(publicKeyPEM);
        KeyFactory kf = KeyFactory.getInstance("RSA");
        PublicKey pubKey = (PublicKey) kf.generatePublic(new X509EncodedKeySpec(encoded));
        Cipher cipher = Cipher.getInstance("RSA/ECB/PKCS1Padding");
        cipher.init(Cipher.ENCRYPT_MODE, pubKey);
        byte[] cipherData = cipher.doFinal(fieldValue.getBytes());
        if (cipherData == null) {
            return null;
        }
        int len = cipherData.length;
        String str = "";
        for (int i = 0; i < len; i++) {
            if ((cipherData[i] & 0xFF) < 16) {
                str = str + "0" + java.lang.Integer.toHexString(cipherData[i] & 0xFF);
            } else {
                str = str + java.lang.Integer.toHexString(cipherData[i] & 0xFF);
            }
        }
        return str.trim();

    } catch (Exception e) {
        System.out.println("oops2");
        System.out.println(e);

    }
    return null;
}

我想在javascript/Nodejs中实现这一点，我try 了以下方法:

import * as NodeRSA from 'node-rsa';

private encryptionFunction(fieldValue: string , pemkey: string) : string {
    const rsa  = new NodeRSA(pemkey);
    const encrypted= rsa.encrypt(fieldValue , 'hex')
    return encrypted

}

但两个函数的输出大小相同，但显然加密类型错误.