Javascript 如何将十六进制字符串转换为字节数组，以及十六进制字符串中的字节数组？
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原文地址: http://stackoverflow.com/questions/14603205/
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How to convert hex string into a bytes array, and a bytes array in the hex string?
提问by SkyN
The following code procedure bytes = parseHexString (createHexString (bytes))leads to updated of bytes, what I would like to avoid. And as a result calculations are not correct.
以下代码过程bytes = parseHexString (createHexString (bytes))导致更新 bytes，这是我想避免的。结果计算不正确。
<html>
<head>
<SCRIPT SRC="http://eu.static.mega.co.nz/sjcl_1.js"></SCRIPT>
<SCRIPT SRC="http://eu.static.mega.co.nz/crypto_1.js"></SCRIPT>
<SCRIPT SRC="http://eu.static.mega.co.nz/rsa_1.js"></SCRIPT>
<SCRIPT SRC="http://eu.static.mega.co.nz/hex_1.js"></SCRIPT>
<SCRIPT>
function parseHexString(str) {
var result = [];
while (str.length >= 2) {
result.push(parseInt(str.substring(0, 2), 16));
str = str.substring(2, str.length);
}
return result;
}
function createHexString(arr) {
var result = "";
for (i in arr) {
var str = arr[i].toString(16);
str = str.length == 0 ? "00" :
str.length == 1 ? "0" + str :
str.length == 2 ? str :
str.substring(str.length-2, str.length);
result += str;
}
return result;
}
function t()
{
var json_k = 'aOrP5yLtNQT53WMQfufSlA';
var json_csid = 'CABD6JUMldvI_eqP0537xl9P8x7kgk2OjOq99Fy7kosphj6AFUtlbwRRDpg4EIifXRLO6FNpdD22WwtUlJ_1Mgye2Y87trEqLCbhahuEFJVQNMDtNbIem7xY2ER9uF-cdgBXZWuzp7XIBybSh7W8MSUlv_eGS6LcLGJ81Q49dSzVhcswHTJ_IJl04p3c0axR6ZIJ8dH5bJ_vXvgQsypUVVtdfMacKhB9cXdEtRZ6iWLKCKqscXdo6CNXlbIdzRhro0gxfmhfB_miysFAiSQrbtuYnIgYBU3i9p3jRlPD4ti3CUcnj0SomV61w1aEYNvo56HPMUZlVkVHA7BFzvHGHo0J';
var json_privk = 'K7LDtk2M2QhjJx_v_Hqf0LKUBaZx76U_vBDjQty9HpFDy2MntF5HxxuyHQ9-1HmXeYzbL1pZnAxsZ7LRUbDnkR6qtJVaGdWuQhrytkuq0l5zBp-O--gZxoQPRGTsVgVRdAvpsRTkQI_q8fxADLCe0womFxtvvnD_FJgjaMsm7vkYchXkoq33WWyHijb3JMkymjl0_GtiSamT0qEL6sm_l5Z1lehqBGUEHfYAa0ub8IDx_yqy2R9Nh8Lwzmz4s24sShVxjaNsMBlSE-sEvTziOsnNWK1Zl_XUYadlENkweuIoxYx_lt8XIV71TzjEFuVTd-pXhzVlqePmIu3SM3bO1Kzq_DnGfB62RmzlmbtHU4iyw4Hd1wQFRhTeSRrvMjsMPFKN-SIIQU7CRNaMuaDxZbNZcOKhMg_h9mApM0rRS3VZaGZzFTL9rSaDMYHw4pL3aOkSFPMY3w785Tss7Zqwuo9HFUWUVbnYAb97JkgCohlMotORrMMtual1dQ4sG1sIYXyWTckAGGL0ZAGurhtSKiyz1m8Lb39pXPacqFh_nCHqqb2_RdrKTj0PdGZESKkU8YedeqC1I9nR4v38DuQc-pBBR5DOwgNjJMvzvsUehs_PxIL8THjgIcr7ONc4hWV9o2v_l81Vo2cCW2I99Iz84IFN2fV1dTqHIG_tnLzz8ljBVygETUqrFdZ0JlQJkurZ7RBku5krm-k9CZmDezCIzPPil-RcYzVIk00gNYAxfiZE48Or4WEiGjgKLnHCYVtSlvlMF4bPGB4SVCZ-68j49EjfSWaMK0OoMkpGhqf7KchgxYBZq6o3AhLgp4t0BClvsdee6VTz1SFqc3m2A-TMG6fNdbCT_Q9nYCYdZIROdOc';
var aes = new sjcl.cipher.aes( prepare_key_pw("oEyoo9cQcw") );
k = decrypt_key(aes, base64_to_a32(json_k) );
aes = new sjcl.cipher.aes(k);
var t = mpi2b(base64urldecode(json_csid));
var privk = a32_to_str(decrypt_key(aes,base64_to_a32(json_privk)));
var rsa_privk = Array(4);
for (var i = 0; i < 4; i++)
{
var l = ((privk.charCodeAt(0)*256+privk.charCodeAt(1)+7)>>3)+2;
rsa_privk[i] = mpi2b(privk.substr(0,l));
if (typeof rsa_privk[i] == 'number') break;
privk = privk.substr(l);
}
var p = parseHexString(createHexString(rsa_privk[0])); // !!!!!!!!!!!!!!!!!!!!!!!!!!!!
var q = parseHexString(createHexString(rsa_privk[1])); // !!!!!!!!!!!!!!!!!!!!!!!!!!!!
var d = parseHexString(createHexString(rsa_privk[2])); // !!!!!!!!!!!!!!!!!!!!!!!!!!!!
var u = parseHexString(createHexString(rsa_privk[3])); // !!!!!!!!!!!!!!!!!!!!!!!!!!!!
sid = base64urlencode(b2s(RSAdecrypt(t,d,p,q,u)).substr(0,43));
if (sid!=='tajetAbW0qTQGFlwp8iD5lQ0TFV1QUZJZFVvjRX7Xx-bPzYBoau7qog09w')
console.log("ERROR");
p = rsa_privk[0];
q = rsa_privk[1];
d = rsa_privk[2];
u = rsa_privk[3];
sid = base64urlencode(b2s(RSAdecrypt(t,d,p,q,u)).substr(0,43));
if (sid=='tajetAbW0qTQGFlwp8iD5lQ0TFV1QUZJZFVvjRX7Xx-bPzYBoau7qog09w')
console.log("OK");
}
</script>
</head>
<body onload="t();"></body>
</html>
I am not javascript developer, and not one found in google code did not work on this data.
我不是 javascript 开发人员，在 google 代码中找到的没有一个不适用于此数据。
Update 1
更新 1
console.log(createHexString(rsa_privk[0])); = e5d109c673d8ef03df564beb9e36e9983a23842b0a724efa45ff76bbe5ad72ed62d2757968
But if do
但如果这样做
parseHexString('e5d109c673d8ef03df564beb9e36e9983a23842b0a724efa45ff76bbe5ad72ed??62d2757968');
then code if (sid!== ...make error
然后代码if (sid!== ...出错
Update 2
更新 2
console.log(rsa_privk[0].toString(16));
output: 123676133,198914513,129998601,245147334,11918451,206998232,96766191,75984899,177840095,106709334,10180427,208237547,119814814,127003446,189062377,84099480,220452154,250519075,267883908,115471915,165124106,238628722,169382478,42320122,95982405,80725759,89608310,85166267,200925925,254033325,86971506,191278317,127411298,180195794,142776693,188738169,39016
输出：123676133,198914513,129998601,245147334,11918451,206998232,96766191,75984899,177840095,106709334,10180427,208237547,119814814,127003446,189062377,84099480,220452154,250519075,267883908,115471915,165124106,238628722,169382478,42320122， 95982405,80725759,89608310,85166267,200925925,254033325,86971506,191278317,127411298,18019577661933325,86971506,18019577661933
Update 3
更新 3
console.log(parseHexString(createHexString(rsa_privk[0])));
console.log(rsa_privk[0]);
output:
输出：
[229, 209, 9, 198, 115, 216, 239, 3, 223, 86, 75, 235, 158, 54, 233, 152, 58, 35, 132, 43, 10, 114, 78, 250, 69, 255, 118, 187, 229, 173, 114, 237, 98, 210, 117, 121, 104]
[123676133, 198914513, 129998601, 245147334, 11918451, 206998232, 96766191, 75984899, 177840095, 106709334, 10180427, 208237547, 119814814, 127003446, 189062377, 84099480, 220452154, 250519075, 267883908, 115471915, 165124106, 238628722, 169382478, 42320122, 95982405, 80725759, 89608310, 85166267, 200925925, 254033325, 86971506, 191278317, 127411298, 180195794, 142776693, 188738169, 39016]
采纳答案by ATOzTOA
Update: Scroll down for solution... Live Demo
更新：向下滚动解决方案......现场演示
The issue: you are using a lossy conversion to hex, which cannot be reversed.
问题：您正在使用无法逆转的有损转换为十六进制。
var p = parseHexString(createHexString(rsa_privk[0]));
This will never be same as rsa_privk[0].
这永远不会与rsa_privk[0].
Because, createHexString()only uses the last 2 bytesfrom each array element.
因为，createHexString()只使用last 2 bytesfrom 每个数组元素。
Example:
例子：
rsa_privk[0] : [123676133, 198914513, 129998601, 245147334, 11918451, 206998232, 96766191, 75984899, 177840095, 106709334, 10180427, 208237547, 119814814, 127003446, 189062377, 84099480, 220452154, 250519075, 267883908, 115471915, 165124106, 238628722, 169382478, 42320122, 95982405, 80725759, 89608310, 85166267, 200925925, 254033325, 86971506, 191278317, 127411298, 180195794, 142776693, 188738169, 39016]
createHexString(rsa_privk[0]) : e5d109c673d8ef03df564beb9e36e9983a23842b0a724efa45ff76bbe5ad72ed62d2757968
parseHexString(createHexString(rsa_privk[0])) : [229, 209, 9, 198, 115, 216, 239, 3, 223, 86, 75, 235, 158, 54, 233, 152, 58, 35, 132, 43, 10, 114, 78, 250, 69, 255, 118, 187, 229, 173, 114, 237, 98, 210, 117, 121, 104]
Update : Working Solution...
更新：工作解决方案...
The two functions... the hex always contains 8 byte blocks, each for each element in the array...
这两个函数……十六进制总是包含 8 个字节的块，每个块对应数组中的每个元素……
function parseHexString(str) {
var result = [];
while (str.length >= 8) {
result.push(parseInt(str.substring(0, 8), 16));
str = str.substring(8, str.length);
}
return result;
}
function createHexString(arr) {
var result = "";
var z;
for (var i = 0; i < arr.length; i++) {
var str = arr[i].toString(16);
z = 8 - str.length + 1;
str = Array(z).join("0") + str;
result += str;
}
return result;
}
Test code...
测试代码...
function test() {
a = [123676133, 198914513, 129998601, 245147334, 11918451, 206998232, 96766191, 75984899, 177840095, 106709334, 10180427, 208237547, 119814814, 127003446, 189062377, 84099480, 220452154, 250519075, 267883908, 115471915, 165124106, 238628722, 169382478, 42320122, 95982405, 80725759, 89608310, 85166267, 200925925, 254033325, 86971506, 191278317, 127411298, 180195794, 142776693, 188738169, 39016];
console.log("Input");
console.log(a);
b = createHexString(a);
console.log("Hex");
console.log(b);
c = parseHexString(b);
console.log("Output");
console.log(c);
if(checkIfEqual(a, c)) {
alert("Same");
}
}
function checkIfEqual(arr1, arr2) {
if (arr1.length != arr2.length) {
return false;
}
//sort them first, then join them and just compare the strings
return arr1.sort().join() == arr2.sort().join();
}
回答by Quark
Convert a hex string to a byte array and vice versa
将十六进制字符串转换为字节数组，反之亦然
note: implementation from crypto-js
注意：来自crypto-js的实现
// Convert a hex string to a byte array
function hexToBytes(hex) {
for (var bytes = [], c = 0; c < hex.length; c += 2)
bytes.push(parseInt(hex.substr(c, 2), 16));
return bytes;
}
// Convert a byte array to a hex string
function bytesToHex(bytes) {
for (var hex = [], i = 0; i < bytes.length; i++) {
var current = bytes[i] < 0 ? bytes[i] + 256 : bytes[i];
hex.push((current >>> 4).toString(16));
hex.push((current & 0xF).toString(16));
}
return hex.join("");
}
回答by niftylettuce
I just wanted to chime in that there is a library at https://github.com/dcodeIO/bytebuffer.jsto easily help with conversions like this, and thus you don't need to write your own functions (which could possibly not be the most optimal, or be more optimal if your solution was reviewed through the open source community on GitHub).
我只是想补充一下，https://github.com/dcodeIO/bytebuffer.js上有一个库可以轻松帮助进行这样的转换，因此您无需编写自己的函数（可能不会如果您的解决方案是通过 GitHub 上的开源社区过的，则是最佳的，或者更优）。
var ByteBuffer = require("bytebuffer");
var bb = ByteBuffer.fromHex(yourHexString);
// need to convert it to base 64?
// bb.toBase64();
See https://github.com/dcodeIO/bytebuffer.js/wiki/API#bytebufferfromhexstr-littleendian-noassertfor the API documention and more insight on the methods I used above.
请参阅https://github.com/dcodeIO/bytebuffer.js/wiki/API#bytebufferfromhexstr-littleendian-noassert以获取 API 文档以及对我上面使用的方法的更多了解。
回答by Vincent
Here is a live sample for this test.
这是此测试的实时示例。
http://jsfiddle.net/vincentwang2020/eks1z4g2/
http://jsfiddle.net/vincentwang2020/eks1z4g2/
function testcreateHexString()
{
alert('test function createHexString');
var key = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24];
var result = createHexString(key);
alert ('Hex value:' + result);
alert('test function parseHexString');
var key2 = parseHexString(result);
if (key.sort().join() == key2.sort().join())
alert ('Matched');
}
回答by newlog
Just to clarify, if you simply want to hex decode a simple string such as 48656C6C6F20576F726C6421(Hello World!) you can use the OP function but instead of using a length of 8 you should use a length of 2.
澄清一下，如果您只是想对一个简单的字符串（例如48656C6C6F20576F726C6421( Hello World!)）进行十六进制解码，您可以使用 OP 函数，但不应使用长度 8，而应使用长度 2。
Code:
代码：
var DecodeHexStringToByteArray = function (hexString) {
var result = [];
while (hexString.length >= 2) {
result.push(parseInt(hexString.substring(0, 2), 16));
hexString = hexString.substring(2, hexString.length);
}
return result;
}
Output will be [72, 101, 108, 108, 111, 32, 87, 111, 114, 108, 100, 33]
输出将是 [72, 101, 108, 108, 111, 32, 87, 111, 114, 108, 100, 33]
I know that this code is already in the OP question, but it's not in the accepted answer. My intent here is only to give a straight answer to the first part of the question being asked (How to convert a hex string into a bytes array).
我知道此代码已在 OP 问题中，但不在已接受的答案中。我在这里的目的只是直接回答所问问题的第一部分（How to convert a hex string into a bytes array）。
