问使用Node.js加密文本文件中的单个行

EN

crypto.pbkdf2(password, salt, iteration, keylen, digest, (error, derivedKey) => {
    const iv = Buffer.from('myiv', 'hex');

    const cipher = crypto.createCipheriv(algorithm, derivedKey, iv);

    let encryptThis = `Encrypt me`;
    let encrypted = '';

    cipher.on('readable', () => {
        let chunk;
        while (null !== (chunk = cipher.read())) {
            encrypted += chunk.toString('base64');
        }
    });

    cipher.on('end', () => {
        console.log(`Example string:   ${encryptThis}`);
    });

    cipher.write(encryptThis);
    cipher.end();
});

readStream
    .pipe(encryptLine)
    .pipe(writeStream)
    .on('finish', err => {
        if (err) console.log(err);
    });