let finalNum = 0;
let temp = 0;
let ac_signature = "_02B4Z6wo00f01"
function bigCountOperation(str) {
let charCodeCount;
for (let i = 0; i < str.length; i++) {
charCodeCount = str.charCodeAt(i)
finalNum = ((finalNum ^ charCodeCount) * 65599) >>> 0
}
return finalNum
}
function countToText(deciNum, ac_signature) {
let offList = [24, 18, 12, 6, 0]
offList.forEach(function (value) {
let keyNum = deciNum >> value & 63
let valNum = keyNum < 26 ? 65 : keyNum < 52 ? 71 : keyNum < 62 ? -4 : -17
let asciiCode = keyNum + valNum
ac_signature += String.fromCharCode(asciiCode)
})
return ac_signature
}
function loadAcSignature(url, ac_nonce, ua) {
let timeStamp = new Date().getTime().toString()
bigCountOperation(timeStamp)
let urlNum = bigCountOperation(url)
let longStr = ((65521 * (finalNum % 65521) ^ timeStamp) >>> 0).toString(2)
while (longStr.length !== 32) {
longStr = "0" + longStr
}
let binaryNum = "10000000110000" + longStr
let deciNum = parseInt(binaryNum, 2)
ac_signature = countToText(deciNum >> 2, ac_signature)
ac_signature = countToText(deciNum << 28 | 515, ac_signature)
ac_signature = countToText((deciNum ^ 1489154074) >>> 6, ac_signature)
let aloneNum = (deciNum ^ 1489154074) & 63
let aloneVal = aloneNum < 26 ? 65 : aloneNum < 52 ? 71 : aloneNum < 62 ? -4 : -17
ac_signature += String.fromCharCode(aloneNum + aloneVal)
finalNum = 0
let deciOperaNum = bigCountOperation(deciNum.toString())
let nonceNum = bigCountOperation(ac_nonce)
finalNum = deciOperaNum
bigCountOperation(ua)
ac_signature = countToText((nonceNum % 65521 | (finalNum % 65521 << 16)) >> 2, ac_signature)
ac_signature = countToText((((finalNum % 65521 << 16) ^ (nonceNum % 65521)) << 28) | ((deciNum << 524576 ^ 524576) >>> 4), ac_signature)
ac_signature = countToText(urlNum % 65521, ac_signature)
let _str = ac_signature;
for (let i of _str) {
temp = ((temp * 65599) + i.charCodeAt(0)) >>> 0
}
let lastStr = temp.toString(16)
ac_signature += lastStr.slice(lastStr.length - 2, lastStr.length)
return ac_signature
}
let url = "https://www.iesdouyin.com/share/video/7242244902514330880/?region=CN&mid=7242244937285225271&u_code=0&did=MS4wLjABAAAAMJIkEfrvb_exdeFzoBXZdjtLDTlKUo9t06mX2esWjKfzndrJ-WTeHG9i2u-1qEQ0&iid=MS4wLjABAAAANwkJuWIRFOzg5uCpDRpMj4OX-QryoDgn-yYlXQnRwQQ&with_sec_did=1&titleType=title&share_sign=fZQkSeX7ifHWD8zERu8KkMpwUU2ZZgKe7zESRaGx9so-&share_version=170400&ts=1689753027&from_ssr=1&from=web_code_link"
let ac_nonce = "064b797e900db9005663d"
let ua = "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/114.0.0.0 Safari/537.36"
console.log(loadAcSignature(url, ac_nonce, ua))
