如何获得Google Apps脚本进行SHA-256加密? [英] How do I get Google Apps Script to do SHA-256 encryption?

问题描述

我需要使用TEXT输入，1个回合，HEX输出和SHA-256加密来加密字符串.应该是长度为64的字符串.
我在Google Apps脚本文档中尝试过的每个SHA-256加密模块都会返回一组数字.例如.

I need to encrypt strings with TEXT input, 1 round, HEX output, SHA-256 encryption. Which should be a string of characters of length 64.
Every SHA-256 encryption module I've tried in Google Apps Script docs returns a set of numbers. For example.

function SHA256() {
    var signature = Utilities.computeHmacSha256Signature("this is my input",
                                                 "my key - use a stronger one",
                                                 Utilities.Charset.US_ASCII);
Logger.log(signature);
    }

输出

[53, -75, -52, -25, -47, 86, -21, 14, -2, -57, 5, -13, 24, 105, -2, -84, 127, 115, -40, -75, -93, -27, -21, 34, -55, -117, -36, -103, -47, 116, -55, -61]

在文档或其他地方，我没有看到任何指定我要针对GAS概述的每个参数的内容.如果需要的话，我不介意将其从头开始放在一起的更深层次的解释.我正在加密信息以发送给Facebook，以进行广告的离线转化. Facebook如何解密加密的字符串?
Google Apps脚本文档
https://developers.google.com /apps-script/reference/utilities/utilities#computeHmacSha256Signature(String，String，Charset)

I haven't seen anything in the docs or elsewhere that specifies every parameter I'm going for outlined above for GAS. I wouldn't mind a deeper explanation of putting it together from scratch if that is what is required. I'm encrypting info to send to Facebook for Offline Conversions for ads. How does Facebook decrypt the encrypted strings?
Google Apps Script docs
https://developers.google.com/apps-script/reference/utilities/utilities#computeHmacSha256Signature(String,String,Charset)

推荐答案

̶U̶t̶i̶l̶i̶t̶i̶e̶s̶.̶c̶o̶m̶p̶u̶t̶e̶H̶m̶a̶c̶S̶h̶a̶2̶5̶6̶S̶i̶g̶n̶a̶t̶u̶r̶e̶ Utilities.computeDigest()返回字节数组(8位整数).如果要将该数组转换为由十六进制字符组成的字符串，则必须手动执行以下操作:

̶U̶t̶i̶l̶i̶t̶i̶e̶s̶.̶c̶o̶m̶p̶u̶t̶e̶H̶m̶a̶c̶S̶h̶a̶2̶5̶6̶S̶i̶g̶n̶a̶t̶u̶r̶e̶ Utilities.computeDigest()returns an array of bytes (8-bit integers). If you want to convert that array to a string composed of hexadecimal characters you'll have to do it manually as follows:

/** @type Byte[] */
var signature = Utilities.computeDigest(Utilities.DigestAlgorithm.SHA_256, value);

/** @type String */
var hexString = signature
    .map(function(byte) {
        // Convert from 2's compliment
        var v = (byte < 0) ? 256 + byte : byte;

        // Convert byte to hexadecimal
        return ("0" + v.toString(16)).slice(-2);
    })
    .join("");

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