Javascript中的CryptoJS WordArray和驱动API补丁更新

我正在编写Chrome扩展，它需要驱动API和。它已经可以以arrayBuffer（）形式获取字节，解密并读取json：

fetch(
    'https://www.googleapis.com/drive/v3/files/' + fileId + '?alt=media',
        {
        method: 'GET',
        headers: {
            Authorization: 'Bearer ' + token,
            'Accept': 'application/json'
            }
        }
).then(response => response.arrayBuffer()
).then(function(respRaw) {
    let respWordArray = CryptoJS.lib.WordArray.create(respRaw);
    let dcWordArray = CryptoJS.AES.decrypt(
        {
            ciphertext: respWordArray
        }, 
        key,
        {   // "AES/CBC/PKCS5Padding"
            iv: iv,
            mode: CryptoJS.mode.CBC,
            padding: CryptoJS.pad.Pkcs7
        }
    );
    let resptext = dcWordArray.toString(CryptoJS.enc.Utf8);
    let respJson = JSON.parse(resptext);
}

现在，我想将每一个加密的内容反向更新回Google Drive：

let newtext = JSON.stringify(respJson);
let newWordArray = CryptoJS.enc.Utf8.parse(newtext);
let ecWordArray = CryptoJS.AES.encrypt( // RangeError: Invalid array length
    {
        ciphertext: newWordArray
    }, 
    key,
    {   // "AES/CBC/PKCS5Padding"
        iv: iv,
        mode: CryptoJS.mode.CBC,
        padding: CryptoJS.pad.Pkcs7
    }
);

//let dcBase64String = ecWordArray.toString(CryptoJS.enc.Base64);
let uint8array     = convertWordArrayToUint8Array(ecWordArray);
let binaryString   = convertUint8ArrayToBinaryString(uint8array);

fetch(
    'https://www.googleapis.com/upload/drive/v3/files/' + fileId,
    {
        method: 'PATCH',
        headers: {
            Authorization: 'Bearer ' + token,
            'Accept': 'text/plain',
            'Content-Type': 'text/plain'
        },
        body: binaryString
    }
).then(response => response.text()
).then(function(data) {
    console.log('data:' + data);
    }
);

遗憾的是，CryptoJS.AES.encrypt（）过程中发生错误：

所以我不知道其余的类型转换是否正确。 如我所见，newWordArray与dcWordArray相同。请澄清我的想法：

• newWordArray和dcWordArray真的是WordArray吗？如何验证
• 对于补丁更新，如何将WordArray作为ArrayBuffer发送
• 解决方案

---

一旦我知道如何检查数据类型+值，事情就变得显而易见了。例如，一些名为ecResult的参数：

console.log(ecResult);
> {$super: {…}, words: Array(28), sigBytes: 112, init: ƒ}

CryptoJS.AES.encrypt不仅仅保存WordArray。因此，我将其重命名并将其转换为ArrayBuffer：

let ecResult = CryptoJS.AES.encrypt(
    newWordArray,
    key,
    {   // "AES/CBC/PKCS7Padding"
        iv: iv,
        mode: CryptoJS.mode.CBC,
        padding: CryptoJS.pad.Pkcs7
        }
);
let ecWordArray = ecResult.ciphertext; // this is WordArray
let ecArrayBuf = CryptJsWordArrayToUint8Array( // github.com/brix/crypto-js/issues/274
    ecWordArray
).buffer; // now we have ArrayBuffer

最后，通过驱动器API使用ArrayBuffer更新文件：

fetch(
    'https://www.googleapis.com/upload/drive/v3/files/' + fileId,
    {
        method: 'PATCH',
        headers: {
            Authorization: 'Bearer ' + token,
            'Accept': 'text/plain',
            'Content-Type': 'text/plain'
            },
        body: ecArrayBuf                                
        }
).then(response => response.text()
).then(function(data) {
    console.log('data:' + data);
);

fetch(
    'https://www.googleapis.com/upload/drive/v3/files/' + fileId,
    {
        method: 'PATCH',
        headers: {
            Authorization: 'Bearer ' + token,
            'Accept': 'text/plain',
            'Content-Type': 'text/plain'
            },
        body: ecArrayBuf                                
        }
).then(response => response.text()
).then(function(data) {
    console.log('data:' + data);
);