基于网易云音乐的歌词js逆向

歌曲的歌词

一、py源码

import jsonimport execjs
import requests# 实例话一个node对象
node = execjs.get()
# js源文件编译
ctx = node.compile(open('网易云2号.js', encoding="utf-8").read())
# 执行js函数
func='getdata(25638340)'
data = ctx.eval(func)
params=data['encText']
encSecKey=data['encSecKey']
# print("params="+params,'encSecKey='+encSecKey)
p={
'params': params,
'encSecKey': encSecKey
}
url='https://music.163.com/weapi/song/lyric?csrf_token='
headers={
'User-Agent':
'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/115.0.0.0 Safari/537.36 Edg/115.0.1901.183'
}
page=requests.post(url=url,headers=headers,params=p).text
# print(page)
data_page=json.loads(page)
print(data_page['lrc']['lyric'])

二、js逆向代码

window = this;
const CryptoJS = require('./package')
function RSAKeyPair(a, b, c) {this.e = biFromHex(a),this.d = biFromHex(b),this.m = biFromHex(c),this.chunkSize = 2 * biHighIndex(this.m),this.radix = 16,this.barrett = new BarrettMu(this.m)
}
function encryptedString(a, b) {for (var f, g, h, i, j, k, l, c = new Array, d = b.length, e = 0; d > e;)c[e] = b.charCodeAt(e),e++;for (; 0 != c.length % a.chunkSize;)c[e++] = 0;for (f = c.length,g = "",e = 0; f > e; e += a.chunkSize) {for (j = new BigInt,h = 0,i = e; i < e + a.chunkSize; ++h)j.digits[h] = c[i++],j.digits[h] += c[i++] << 8;k = a.barrett.powMod(j, a.e),l = 16 == a.radix ? biToHex(k) : biToString(k, a.radix),g += l + " "}return g.substring(0, g.length - 1)
}function setMaxDigits(a) {maxDigits = a,ZERO_ARRAY = new Array(maxDigits);for (var b = 0; b < ZERO_ARRAY.length; b++)ZERO_ARRAY[b] = 0;bigZero = new BigInt,bigOne = new BigInt,bigOne.digits[0] = 1
}
function BigInt(a) {this.digits = "boolean" == typeof a && 1 == a ? null : ZERO_ARRAY.slice(0),this.isNeg = !1
}
function biFromDecimal(a) {for (var d, e, f, b = "-" == a.charAt(0), c = b ? 1 : 0; c < a.length && "0" == a.charAt(c);)++c;if (c == a.length)d = new BigInt;else {for (e = a.length - c,f = e % dpl10,0 == f && (f = dpl10),d = biFromNumber(Number(a.substr(c, f))),c += f; c < a.length;)d = biAdd(biMultiply(d, lr10), biFromNumber(Number(a.substr(c, dpl10)))),c += dpl10;d.isNeg = b}return d
}
function biCopy(a) {var b = new BigInt(!0);return b.digits = a.digits.slice(0),b.isNeg = a.isNeg,b
}
function biFromNumber(a) {var c, b = new BigInt;for (b.isNeg = 0 > a,a = Math.abs(a),c = 0; a > 0;)b.digits[c++] = a & maxDigitVal,a >>= biRadixBits;return b
}
function reverseStr(a) {var c, b = "";for (c = a.length - 1; c > -1; --c)b += a.charAt(c);return b
}
function biToString(a, b) {var d, e, c = new BigInt;for (c.digits[0] = b,d = biDivideModulo(a, c),e = hexatrigesimalToChar[d[1].digits[0]]; 1 == biCompare(d[0], bigZero);)d = biDivideModulo(d[0], c),digit = d[1].digits[0],e += hexatrigesimalToChar[d[1].digits[0]];return (a.isNeg ? "-" : "") + reverseStr(e)
}
function biToDecimal(a) {var c, d, b = new BigInt;for (b.digits[0] = 10,c = biDivideModulo(a, b),d = String(c[1].digits[0]); 1 == biCompare(c[0], bigZero);)c = biDivideModulo(c[0], b),d += String(c[1].digits[0]);return (a.isNeg ? "-" : "") + reverseStr(d)
}
function digitToHex(a) {var b = 15, c = "";for (i = 0; 4 > i; ++i)c += hexToChar[a & b],a >>>= 4;return reverseStr(c)
}
function biToHex(a) {var d, b = "";for (biHighIndex(a),d = biHighIndex(a); d > -1; --d)b += digitToHex(a.digits[d]);return b
}
function charToHex(a) {var h, b = 48, c = b + 9, d = 97, e = d + 25, f = 65, g = 90;return h = a >= b && c >= a ? a - b : a >= f && g >= a ? 10 + a - f : a >= d && e >= a ? 10 + a - d : 0
}
function hexToDigit(a) {var d, b = 0, c = Math.min(a.length, 4);for (d = 0; c > d; ++d)b <<= 4,b |= charToHex(a.charCodeAt(d));return b
}
function biFromHex(a) {var d, e, b = new BigInt, c = a.length;for (d = c,e = 0; d > 0; d -= 4,++e)b.digits[e] = hexToDigit(a.substr(Math.max(d - 4, 0), Math.min(d, 4)));return b
}
function biFromString(a, b) {var g, h, i, j, c = "-" == a.charAt(0), d = c ? 1 : 0, e = new BigInt, f = new BigInt;for (f.digits[0] = 1,g = a.length - 1; g >= d; g--)h = a.charCodeAt(g),i = charToHex(h),j = biMultiplyDigit(f, i),e = biAdd(e, j),f = biMultiplyDigit(f, b);return e.isNeg = c,e
}
function biDump(a) {return (a.isNeg ? "-" : "") + a.digits.join(" ")
}
function biAdd(a, b) {var c, d, e, f;if (a.isNeg != b.isNeg)b.isNeg = !b.isNeg,c = biSubtract(a, b),b.isNeg = !b.isNeg;else {for (c = new BigInt,d = 0,f = 0; f < a.digits.length; ++f)e = a.digits[f] + b.digits[f] + d,c.digits[f] = 65535 & e,d = Number(e >= biRadix);c.isNeg = a.isNeg}return c
}
function biSubtract(a, b) {var c, d, e, f;if (a.isNeg != b.isNeg)b.isNeg = !b.isNeg,c = biAdd(a, b),b.isNeg = !b.isNeg;else {for (c = new BigInt,e = 0,f = 0; f < a.digits.length; ++f)d = a.digits[f] - b.digits[f] + e,c.digits[f] = 65535 & d,c.digits[f] < 0 && (c.digits[f] += biRadix),e = 0 - Number(0 > d);if (-1 == e) {for (e = 0,f = 0; f < a.digits.length; ++f)d = 0 - c.digits[f] + e,c.digits[f] = 65535 & d,c.digits[f] < 0 && (c.digits[f] += biRadix),e = 0 - Number(0 > d);c.isNeg = !a.isNeg} elsec.isNeg = a.isNeg}return c
}
function biHighIndex(a) {for (var b = a.digits.length - 1; b > 0 && 0 == a.digits[b];)--b;return b
}
function biNumBits(a) {var e, b = biHighIndex(a), c = a.digits[b], d = (b + 1) * bitsPerDigit;for (e = d; e > d - bitsPerDigit && 0 == (32768 & c); --e)c <<= 1;return e
}
function biMultiply(a, b) {var d, h, i, k, c = new BigInt, e = biHighIndex(a), f = biHighIndex(b);for (k = 0; f >= k; ++k) {for (d = 0,i = k,j = 0; e >= j; ++j,++i)h = c.digits[i] + a.digits[j] * b.digits[k] + d,c.digits[i] = h & maxDigitVal,d = h >>> biRadixBits;c.digits[k + e + 1] = d}return c.isNeg = a.isNeg != b.isNeg,c
}
function biMultiplyDigit(a, b) {var c, d, e, f;for (result = new BigInt,c = biHighIndex(a),d = 0,f = 0; c >= f; ++f)e = result.digits[f] + a.digits[f] * b + d,result.digits[f] = e & maxDigitVal,d = e >>> biRadixBits;return result.digits[1 + c] = d,result
}
function arrayCopy(a, b, c, d, e) {var g, h, f = Math.min(b + e, a.length);for (g = b,h = d; f > g; ++g,++h)c[h] = a[g]
}
function biShiftLeft(a, b) {var e, f, g, h, c = Math.floor(b / bitsPerDigit), d = new BigInt;for (arrayCopy(a.digits, 0, d.digits, c, d.digits.length - c),e = b % bitsPerDigit,f = bitsPerDigit - e,g = d.digits.length - 1,h = g - 1; g > 0; --g,--h)d.digits[g] = d.digits[g] << e & maxDigitVal | (d.digits[h] & highBitMasks[e]) >>> f;return d.digits[0] = d.digits[g] << e & maxDigitVal,d.isNeg = a.isNeg,d
}
function biShiftRight(a, b) {var e, f, g, h, c = Math.floor(b / bitsPerDigit), d = new BigInt;for (arrayCopy(a.digits, c, d.digits, 0, a.digits.length - c),e = b % bitsPerDigit,f = bitsPerDigit - e,g = 0,h = g + 1; g < d.digits.length - 1; ++g,++h)d.digits[g] = d.digits[g] >>> e | (d.digits[h] & lowBitMasks[e]) << f;return d.digits[d.digits.length - 1] >>>= e,d.isNeg = a.isNeg,d
}
function biMultiplyByRadixPower(a, b) {var c = new BigInt;return arrayCopy(a.digits, 0, c.digits, b, c.digits.length - b),c
}
function biDivideByRadixPower(a, b) {var c = new BigInt;return arrayCopy(a.digits, b, c.digits, 0, c.digits.length - b),c
}
function biModuloByRadixPower(a, b) {var c = new BigInt;return arrayCopy(a.digits, 0, c.digits, 0, b),c
}
function biCompare(a, b) {if (a.isNeg != b.isNeg)return 1 - 2 * Number(a.isNeg);for (var c = a.digits.length - 1; c >= 0; --c)if (a.digits[c] != b.digits[c])return a.isNeg ? 1 - 2 * Number(a.digits[c] > b.digits[c]) : 1 - 2 * Number(a.digits[c] < b.digits[c]);return 0
}
function biDivideModulo(a, b) {var f, g, h, i, j, k, l, m, n, o, p, q, r, s, c = biNumBits(a), d = biNumBits(b), e = b.isNeg;if (d > c)return a.isNeg ? (f = biCopy(bigOne),f.isNeg = !b.isNeg,a.isNeg = !1,b.isNeg = !1,g = biSubtract(b, a),a.isNeg = !0,b.isNeg = e) : (f = new BigInt,g = biCopy(a)),new Array(f, g);for (f = new BigInt,g = a,h = Math.ceil(d / bitsPerDigit) - 1,i = 0; b.digits[h] < biHalfRadix;)b = biShiftLeft(b, 1),++i,++d,h = Math.ceil(d / bitsPerDigit) - 1;for (g = biShiftLeft(g, i),c += i,j = Math.ceil(c / bitsPerDigit) - 1,k = biMultiplyByRadixPower(b, j - h); -1 != biCompare(g, k);)++f.digits[j - h],g = biSubtract(g, k);for (l = j; l > h; --l) {for (m = l >= g.digits.length ? 0 : g.digits[l],n = l - 1 >= g.digits.length ? 0 : g.digits[l - 1],o = l - 2 >= g.digits.length ? 0 : g.digits[l - 2],p = h >= b.digits.length ? 0 : b.digits[h],q = h - 1 >= b.digits.length ? 0 : b.digits[h - 1],f.digits[l - h - 1] = m == p ? maxDigitVal : Math.floor((m * biRadix + n) / p),r = f.digits[l - h - 1] * (p * biRadix + q),s = m * biRadixSquared + (n * biRadix + o); r > s;)--f.digits[l - h - 1],r = f.digits[l - h - 1] * (p * biRadix | q),s = m * biRadix * biRadix + (n * biRadix + o);k = biMultiplyByRadixPower(b, l - h - 1),g = biSubtract(g, biMultiplyDigit(k, f.digits[l - h - 1])),g.isNeg && (g = biAdd(g, k),--f.digits[l - h - 1])}return g = biShiftRight(g, i),f.isNeg = a.isNeg != e,a.isNeg && (f = e ? biAdd(f, bigOne) : biSubtract(f, bigOne),b = biShiftRight(b, i),g = biSubtract(b, g)),0 == g.digits[0] && 0 == biHighIndex(g) && (g.isNeg = !1),new Array(f, g)
}
function biDivide(a, b) {return biDivideModulo(a, b)[0]
}
function biModulo(a, b) {return biDivideModulo(a, b)[1]
}
function biMultiplyMod(a, b, c) {return biModulo(biMultiply(a, b), c)
}
function biPow(a, b) {for (var c = bigOne, d = a; ;) {if (0 != (1 & b) && (c = biMultiply(c, d)),b >>= 1,0 == b)break;d = biMultiply(d, d)}return c
}
function biPowMod(a, b, c) {for (var d = bigOne, e = a, f = b; ;) {if (0 != (1 & f.digits[0]) && (d = biMultiplyMod(d, e, c)),f = biShiftRight(f, 1),0 == f.digits[0] && 0 == biHighIndex(f))break;e = biMultiplyMod(e, e, c)}return d
}
function BarrettMu(a) {this.modulus = biCopy(a),this.k = biHighIndex(this.modulus) + 1;var b = new BigInt;b.digits[2 * this.k] = 1,this.mu = biDivide(b, this.modulus),this.bkplus1 = new BigInt,this.bkplus1.digits[this.k + 1] = 1,this.modulo = BarrettMu_modulo,this.multiplyMod = BarrettMu_multiplyMod,this.powMod = BarrettMu_powMod
}
function BarrettMu_modulo(a) {var i, b = biDivideByRadixPower(a, this.k - 1), c = biMultiply(b, this.mu), d = biDivideByRadixPower(c, this.k + 1), e = biModuloByRadixPower(a, this.k + 1), f = biMultiply(d, this.modulus), g = biModuloByRadixPower(f, this.k + 1), h = biSubtract(e, g);for (h.isNeg && (h = biAdd(h, this.bkplus1)),i = biCompare(h, this.modulus) >= 0; i;)h = biSubtract(h, this.modulus),i = biCompare(h, this.modulus) >= 0;return h
}
function BarrettMu_multiplyMod(a, b) {var c = biMultiply(a, b);return this.modulo(c)
}
function BarrettMu_powMod(a, b) {var d, e, c = new BigInt;for (c.digits[0] = 1,d = a,e = b; ;) {if (0 != (1 & e.digits[0]) && (c = this.multiplyMod(c, d)),e = biShiftRight(e, 1),0 == e.digits[0] && 0 == biHighIndex(e))break;d = this.multiplyMod(d, d)}return c
}
var maxDigits, ZERO_ARRAY, bigZero, bigOne, dpl10, lr10, hexatrigesimalToChar, hexToChar, highBitMasks, lowBitMasks, biRadixBase = 2, biRadixBits = 16, bitsPerDigit = biRadixBits, biRadix = 65536, biHalfRadix = biRadix >>> 1, biRadixSquared = biRadix * biRadix, maxDigitVal = biRadix - 1, maxInteger = 9999999999999998;
setMaxDigits(20),dpl10 = 15,lr10 = biFromNumber(1e15),hexatrigesimalToChar = new Array("0", "1", "2", "3", "4", "5", "6", "7", "8", "9", "a", "b", "c", "d", "e", "f", "g", "h", "i", "j", "k", "l", "m", "n", "o", "p", "q", "r", "s", "t", "u", "v", "w", "x", "y", "z"),hexToChar = new Array("0", "1", "2", "3", "4", "5", "6", "7", "8", "9", "a", "b", "c", "d", "e", "f"),highBitMasks = new Array(0, 32768, 49152, 57344, 61440, 63488, 64512, 65024, 65280, 65408, 65472, 65504, 65520, 65528, 65532, 65534, 65535),lowBitMasks = new Array(0, 1, 3, 7, 15, 31, 63, 127, 255, 511, 1023, 2047, 4095, 8191, 16383, 32767, 65535);
function a(a) {var d, e, b = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789", c = "";for (d = 0; a > d; d += 1)e = Math.random() * b.length,e = Math.floor(e),c += b.charAt(e);return c
}
function b(a, b) {var c = CryptoJS.enc.Utf8.parse(b), d = CryptoJS.enc.Utf8.parse("0102030405060708"), e = CryptoJS.enc.Utf8.parse(a), f = CryptoJS.AES.encrypt(e, c, {iv: d,mode: CryptoJS.mode.CBC});return f.toString()
}
function c(a, b, c) {var d, e;return setMaxDigits(131),d = new RSAKeyPair(b, "", c),e = encryptedString(d, a)
}
function d(d, e, f, g) {var h = {}, i = a(16);return h.encText = b(d, g),h.encText = b(h.encText, i),h.encSecKey = c(i, e, f),h
}
function e(a, b, d, e) {var f = {};return f.encText = c(a + e, b, d),f
}window.asrsea = d,window.ecnonasr = e
function getdata(id) {var data = window.asrsea(JSON.stringify({ "id": id, "lv": -1, "tv": -1, "csrf_token": "" }), '010001', '00e0b509f6259df8642dbc35662901477df22677ec152b5ff68ace615bb7b725152b3ab17a876aea8a5aa76d2e417629ec4ee341f56135fccf695280104e0312ecbda92557c93870114af6c9d05c4f7f0c3685b7a46bee255932575cce10b424d813cfe4875d3e82047b97ddef52741d546b8e289dc6935b3ece0462db0a22b8e7', '0CoJUm6Qyw8W8jud');return data}
getdata(25638340)

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