主要部分

各位前辈，你们是选择照着 JS 代码敲一遍具体代码，还是选择使用 js 引擎获得运行结果呢？

如果是自己实现 JS 功能的话，我放出关键的 JS 代码，感觉工作量略大。。。。。

两个变量

{"exponent":"AQAB","modulus":"AKpNUUppYjjjE7HljGMT4ufwytJIEoz68S0+K3\/Wvjwotal0lUlu3xvnzlJR3OCrkxEzk4Oa5zvKUhMARip4oO+dprByj97ip7k2M70O8ft28mLs95WEkiMNiLrWJ66hE1pABLSEAxX1RObZsoo\/8XSQ+NlqkwcCY\/cC5nuoG95V"}

登录加密关键代码

var rsaKey = new RSAKey();
		rsaKey.setPublic(b64tohex(modulus), b64tohex(exponent));
		var enPassword = hex2b64(rsaKey.encrypt($("#mm").val()));
		$("#mm").val(enPassword);
		$("#hidMm").val(enPassword);

rsa.js

// Depends on jsbn.js and rng.js

// Version 1.1: support utf-8 encoding in pkcs1pad2

// convert a (hex) string to a bignum object
function parseBigInt(str,r) {
  return new BigInteger(str,r);
}

function linebrk(s,n) {
  var ret = "";
  var i = 0;
  while(i + n < s.length) {
    ret += s.substring(i,i+n) + "\n";
    i += n;
  }
  return ret + s.substring(i,s.length);
}

function byte2Hex(b) {
  if(b < 0x10)
    return "0" + b.toString(16);
  else
    return b.toString(16);
}

// PKCS#1 (type 2, random) pad input string s to n bytes, and return a bigint
function pkcs1pad2(s,n) {
  if(n < s.length + 11) { // TODO: fix for utf-8
    alert("Message too long for RSA");
    return null;
  }
  var ba = new Array();
  var i = s.length - 1;
  while(i >= 0 && n > 0) {
    var c = s.charCodeAt(i--);
    if(c < 128) { // encode using utf-8
      ba[--n] = c;
    }
    else if((c > 127) && (c < 2048)) {
      ba[--n] = (c & 63) | 128;
      ba[--n] = (c >> 6) | 192;
    }
    else {
      ba[--n] = (c & 63) | 128;
      ba[--n] = ((c >> 6) & 63) | 128;
      ba[--n] = (c >> 12) | 224;
    }
  }
  ba[--n] = 0;
  var rng = new SecureRandom();
  var x = new Array();
  while(n > 2) { // random non-zero pad
    x[0] = 0;
    while(x[0] == 0) rng.nextBytes(x);
    ba[--n] = x[0];
  }
  ba[--n] = 2;
  ba[--n] = 0;
  return new BigInteger(ba);
}

// "empty" RSA key constructor
function RSAKey() {
  this.n = null;
  this.e = 0;
  this.d = null;
  this.p = null;
  this.q = null;
  this.dmp1 = null;
  this.dmq1 = null;
  this.coeff = null;
}

// Set the public key fields N and e from hex strings
function RSASetPublic(N,E) {
  if(N != null && E != null && N.length > 0 && E.length > 0) {
    this.n = parseBigInt(N,16);
    this.e = parseInt(E,16);
  }
  else
    alert("Invalid RSA public key");
}

// Perform raw public operation on "x": return x^e (mod n)
function RSADoPublic(x) {
  return x.modPowInt(this.e, this.n);
}

// Return the PKCS#1 RSA encryption of "text" as an even-length hex string
function RSAEncrypt(text) {
  var m = pkcs1pad2(text,(this.n.bitLength()+7)>>3);
  if(m == null) return null;
  var c = this.doPublic(m);
  if(c == null) return null;
  var h = c.toString(16);
  if((h.length & 1) == 0) return h; else return "0" + h;
}

// Return the PKCS#1 RSA encryption of "text" as a Base64-encoded string
//function RSAEncryptB64(text) {
//  var h = this.encrypt(text);
//  if(h) return hex2b64(h); else return null;
//}

// protected
RSAKey.prototype.doPublic = RSADoPublic;

// public
RSAKey.prototype.setPublic = RSASetPublic;
RSAKey.prototype.encrypt = RSAEncrypt;
//RSAKey.prototype.encrypt_b64 = RSAEncryptB64;

base64.js

var b64map="ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
var b64pad="=";

function hex2b64(h) {
  var i;
  var c;
  var ret = "";
  for(i = 0; i+3 <= h.length; i+=3) {
    c = parseInt(h.substring(i,i+3),16);
    ret += b64map.charAt(c >> 6) + b64map.charAt(c & 63);
  }
  if(i+1 == h.length) {
    c = parseInt(h.substring(i,i+1),16);
    ret += b64map.charAt(c << 2);
  }
  else if(i+2 == h.length) {
    c = parseInt(h.substring(i,i+2),16);
    ret += b64map.charAt(c >> 2) + b64map.charAt((c & 3) << 4);
  }
  while((ret.length & 3) > 0) ret += b64pad;
  return ret;
}

// convert a base64 string to hex
function b64tohex(s) {
  var ret = ""
  var i;
  var k = 0; // b64 state, 0-3
  var slop;
  for(i = 0; i < s.length; ++i) {
    if(s.charAt(i) == b64pad) break;
    v = b64map.indexOf(s.charAt(i));
    if(v < 0) continue;
    if(k == 0) {
      ret += int2char(v >> 2);
      slop = v & 3;
      k = 1;
    }
    else if(k == 1) {
      ret += int2char((slop << 2) | (v >> 4));
      slop = v & 0xf;
      k = 2;
    }
    else if(k == 2) {
      ret += int2char(slop);
      ret += int2char(v >> 2);
      slop = v & 3;
      k = 3;
    }
    else {
      ret += int2char((slop << 2) | (v >> 4));
      ret += int2char(v & 0xf);
      k = 0;
    }
  }
  if(k == 1)
    ret += int2char(slop << 2);
  return ret;
}

// convert a base64 string to a byte/number array
function b64toBA(s) {
  //piggyback on b64tohex for now, optimize later
  var h = b64tohex(s);
  var i;
  var a = new Array();
  for(i = 0; 2*i < h.length; ++i) {
    a[i] = parseInt(h.substring(2*i,2*i+2),16);
  }
  return a;
}

爬虫模拟登录中，目标网站使用 JS 加密密码再 POST，是选择模拟一遍 JS 代码，还是选择使用 JS 引擎获得运行结果？

主要部分

两个变量

登录加密关键代码

rsa.js

base64.js