github.com/qjfoidnh/BaiduPCS-Go@v0.0.0-20231011165705-caa18a3765f3/baidupcs/netdisksign/sign2.js (about)

     1  function s(j, r) {
     2      var a = [];
     3      var p = [];
     4      var o = "";
     5      var v = j.length;
     6      for (var q = 0; q < 256; q++) {
     7          a[q] = j.substr((q % v), 1).charCodeAt(0);
     8          // console.log(q, q%v);
     9          p[q] = q;
    10          // console.log(q, a[q], p[q]);
    11      }
    12      for (var u = q = 0; q < 256; q++) {
    13          u = (u + p[q] + a[q]) % 256;
    14          var t = p[q];
    15          p[q] = p[u];
    16          p[u] = t;
    17      }
    18      // console.log(p)
    19      for (var i = u = q = 0; q < r.length; q++) {
    20          i = (i + 1) % 256;
    21          u = (u + p[i]) % 256;
    22          var t = p[i];
    23          p[i] = p[u];
    24          p[u] = t;
    25          k = p[((p[i] + p[u]) % 256)];
    26          o += String.fromCharCode(r.charCodeAt(q) ^ k);
    27      }
    28      return o;
    29  };
    30  
    31  function base64encode(t) {
    32      var r, e, a, o, n, i, s = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
    33      for (a = t.length,
    34      e = 0,
    35      r = ""; a > e; ) {
    36          if (o = 255 & t.charCodeAt(e++),
    37          e == a) {
    38              r += s.charAt(o >> 2),
    39              r += s.charAt((3 & o) << 4),
    40              r += "==";
    41              break
    42          }
    43          if (n = t.charCodeAt(e++),
    44          e == a) {
    45              r += s.charAt(o >> 2),
    46              r += s.charAt((3 & o) << 4 | (240 & n) >> 4),
    47              r += s.charAt((15 & n) << 2),
    48              r += "=";
    49              break
    50          }
    51          i = t.charCodeAt(e++),
    52          r += s.charAt(o >> 2),
    53          r += s.charAt((3 & o) << 4 | (240 & n) >> 4),
    54          r += s.charAt((15 & n) << 2 | (192 & i) >> 6),
    55          r += s.charAt(63 & i)
    56      }
    57      return r
    58  }
    59  
    60  var s1 = s("e8c7d729eea7b54551aa594f942decbe", "37dbe07ade9359c1aa70807e847f768c13360ad2");
    61  console.log(s1);
    62  console.log(base64encode(s1));