on('{"name":"abcde","password":"15e2b0d3c33891ebb0f1ef609ec419420c20e320ce94c65fbc8c3312448eb225"}')

%7B%22name%22:%22abcde%22,%22password%22:%2215e2b0d3c33891ebb0f1ef609ec419420c20e320ce94c65fbc8c3312448eb225%22%7D


开局的 void 0 === t && (t = Ye);
t() 就是随机数了，n 就是 0~3 之间的随机数了

原始字符串：
{"name":"abcde","password":"15e2b0d3c33891ebb0f1ef609ec419420c20e320ce94c65fbc8c3312448eb225"}

长度 94

先 stringify，
"{\"name\":\"abcde\",\"password\":\"15e2b0d3c33891ebb0f1ef609ec419420c20e320ce94c65fbc8c3312448eb225\"}"
长度 104

然后逐个 charCodeAt：
[34,123,92,34,110,97,109,101,92,34,58,92,34,97,98,99,100,101,92,34,44,92,34,112,97,115,115,119,111,114,100,92,34,58,92,34,49,53,101,50,98,48,100,51,99,51,51,56,57,49,101,98,98,48,102,49,101,102,54,48,57,101,99,52,49,57,52,50,48,99,50,48,101,51,50,48,99,101,57,52,99,54,53,102,98,99,56,99,51,51,49,50,52,52,56,101,98,50,50,53,92,34,125,34]

长度 104

console.log("17",r);


var i = 1 + rn.length + 1 + n + 7 + r.length;
i 不知道干啥的，先不管

然后初始化了 o a

u = 0，s = 随机数

for (var c = 0, l = rn; c < l.length; c++) {
var d = l[c];
a[u++] = s + d
}


a[u++] = s; 也就是 a[0]=s, u=1


for (var c = 0, l = rn; c < l.length; c++) {
var d = l[c];
a[u++] = s + d
}

也就是把 a[1] a[2] 赋值为 s + rn[1,2]

a[u++] = s + n;


把 a[3] 赋值为 s + n

for (var f = 0; f < n; ++f)
a[u++] = t();

把 a[4]~a[3+n-1] 赋值为随机数

for (f = 0; f < 7; ++f)
v[f] = t(),
a[u++] = v[f];

弄 7 个随机数放进 a[...]

for (f = 0; f < r.length; ++f)
a[u++] = r[f] ^ v[f % 7];

对应这 7 个随机数，对 r 做异或