oplop.js

var md5 = {};

/**
   URL-safe base 64 encoding.

   @param {!string} s String to hash.
   @return {!string} Hash.
*/
md5.urlsafe_base64 = function urlsafe_base64(s) {
    return md5.binl2b64_(md5.core_(md5.str2binl_(s), s.length * md5.chrsz_));
};

/**
  @const
  @private
*/
md5.b64pad_ = '=';

/**
   @const
   @private
*/
md5.chrsz_ = 8;

/**
  @const
  @private
*/
md5.tab_ = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789-_';

/**
  @param {Array.<number>} x .
  @param {number} len .
  @return {Array.<number>} .
  @private
*/
md5.core_ = function core_(x, len) {
  /* append padding */
  x[len >> 5] |= 0x80 << ((len) % 32);
  x[(((len + 64) >>> 9) << 4) + 14] = len;

  var a = 1732584193;
  var b = -271733879;
  var c = -1732584194;
  var d = 271733878;

  for (var i = 0; i < x.length; i += 16) {
    var olda = a;
    var oldb = b;
    var oldc = c;
    var oldd = d;

    a = md5.ff_(a, b, c, d, x[i + 0], 7 , -680876936);
    d = md5.ff_(d, a, b, c, x[i + 1], 12, -389564586);
    c = md5.ff_(c, d, a, b, x[i + 2], 17, 606105819);
    b = md5.ff_(b, c, d, a, x[i + 3], 22, -1044525330);
    a = md5.ff_(a, b, c, d, x[i + 4], 7 , -176418897);
    d = md5.ff_(d, a, b, c, x[i + 5], 12, 1200080426);
    c = md5.ff_(c, d, a, b, x[i + 6], 17, -1473231341);
    b = md5.ff_(b, c, d, a, x[i + 7], 22, -45705983);
    a = md5.ff_(a, b, c, d, x[i + 8], 7 , 1770035416);
    d = md5.ff_(d, a, b, c, x[i + 9], 12, -1958414417);
    c = md5.ff_(c, d, a, b, x[i + 10], 17, -42063);
    b = md5.ff_(b, c, d, a, x[i + 11], 22, -1990404162);
    a = md5.ff_(a, b, c, d, x[i + 12], 7 , 1804603682);
    d = md5.ff_(d, a, b, c, x[i + 13], 12, -40341101);
    c = md5.ff_(c, d, a, b, x[i + 14], 17, -1502002290);
    b = md5.ff_(b, c, d, a, x[i + 15], 22, 1236535329);

    a = md5.gg_(a, b, c, d, x[i + 1], 5 , -165796510);
    d = md5.gg_(d, a, b, c, x[i + 6], 9 , -1069501632);
    c = md5.gg_(c, d, a, b, x[i + 11], 14, 643717713);
    b = md5.gg_(b, c, d, a, x[i + 0], 20, -373897302);
    a = md5.gg_(a, b, c, d, x[i + 5], 5 , -701558691);
    d = md5.gg_(d, a, b, c, x[i + 10], 9 , 38016083);
    c = md5.gg_(c, d, a, b, x[i + 15], 14, -660478335);
    b = md5.gg_(b, c, d, a, x[i + 4], 20, -405537848);
    a = md5.gg_(a, b, c, d, x[i + 9], 5 , 568446438);
    d = md5.gg_(d, a, b, c, x[i + 14], 9 , -1019803690);
    c = md5.gg_(c, d, a, b, x[i + 3], 14, -187363961);
    b = md5.gg_(b, c, d, a, x[i + 8], 20, 1163531501);
    a = md5.gg_(a, b, c, d, x[i + 13], 5 , -1444681467);
    d = md5.gg_(d, a, b, c, x[i + 2], 9 , -51403784);
    c = md5.gg_(c, d, a, b, x[i + 7], 14, 1735328473);
    b = md5.gg_(b, c, d, a, x[i + 12], 20, -1926607734);

    a = md5.hh_(a, b, c, d, x[i + 5], 4 , -378558);
    d = md5.hh_(d, a, b, c, x[i + 8], 11, -2022574463);
    c = md5.hh_(c, d, a, b, x[i + 11], 16, 1839030562);
    b = md5.hh_(b, c, d, a, x[i + 14], 23, -35309556);
    a = md5.hh_(a, b, c, d, x[i + 1], 4 , -1530992060);
    d = md5.hh_(d, a, b, c, x[i + 4], 11, 1272893353);
    c = md5.hh_(c, d, a, b, x[i + 7], 16, -155497632);
    b = md5.hh_(b, c, d, a, x[i + 10], 23, -1094730640);
    a = md5.hh_(a, b, c, d, x[i + 13], 4 , 681279174);
    d = md5.hh_(d, a, b, c, x[i + 0], 11, -358537222);
    c = md5.hh_(c, d, a, b, x[i + 3], 16, -722521979);
    b = md5.hh_(b, c, d, a, x[i + 6], 23, 76029189);
    a = md5.hh_(a, b, c, d, x[i + 9], 4 , -640364487);
    d = md5.hh_(d, a, b, c, x[i + 12], 11, -421815835);
    c = md5.hh_(c, d, a, b, x[i + 15], 16, 530742520);
    b = md5.hh_(b, c, d, a, x[i + 2], 23, -995338651);

    a = md5.ii_(a, b, c, d, x[i + 0], 6 , -198630844);
    d = md5.ii_(d, a, b, c, x[i + 7], 10, 1126891415);
    c = md5.ii_(c, d, a, b, x[i + 14], 15, -1416354905);
    b = md5.ii_(b, c, d, a, x[i + 5], 21, -57434055);
    a = md5.ii_(a, b, c, d, x[i + 12], 6 , 1700485571);
    d = md5.ii_(d, a, b, c, x[i + 3], 10, -1894986606);
    c = md5.ii_(c, d, a, b, x[i + 10], 15, -1051523);
    b = md5.ii_(b, c, d, a, x[i + 1], 21, -2054922799);
    a = md5.ii_(a, b, c, d, x[i + 8], 6 , 1873313359);
    d = md5.ii_(d, a, b, c, x[i + 15], 10, -30611744);
    c = md5.ii_(c, d, a, b, x[i + 6], 15, -1560198380);
    b = md5.ii_(b, c, d, a, x[i + 13], 21, 1309151649);
    a = md5.ii_(a, b, c, d, x[i + 4], 6 , -145523070);
    d = md5.ii_(d, a, b, c, x[i + 11], 10, -1120210379);
    c = md5.ii_(c, d, a, b, x[i + 2], 15, 718787259);
    b = md5.ii_(b, c, d, a, x[i + 9], 21, -343485551);

    a = md5.safe_add_(a, olda);
    b = md5.safe_add_(b, oldb);
    c = md5.safe_add_(c, oldc);
    d = md5.safe_add_(d, oldd);
  }
  return Array(a, b, c, d);

};

/**
  @param {number} q .
  @param {number} a .
  @param {number} b .
  @param {number} x .
  @param {number} s .
  @param {number} t .
  @return {number} .
  @private
*/
md5.cmn_ = function cmn_(q, a, b, x, s, t) {
  return md5.safe_add_(md5.bit_rol_(
              md5.safe_add_(md5.safe_add_(a, q), md5.safe_add_(x, t)), s), b);
};

/**
  @param {number} a .
  @param {number} b .
  @param {number} c .
  @param {number} d .
  @param {number} x .
  @param {number} s .
  @param {number} t .
  @return {number} .
  @private
*/
md5.ff_ = function ff_(a, b, c, d, x, s, t) {
  return md5.cmn_((b & c) | ((~b) & d), a, b, x, s, t);
};

/**
  @param {number} a .
  @param {number} b .
  @param {number} c .
  @param {number} d .
  @param {number} x .
  @param {number} s .
  @param {number} t .
  @return {number} .
  @private
*/
md5.gg_ = function gg_(a, b, c, d, x, s, t) {
  return md5.cmn_((b & d) | (c & (~d)), a, b, x, s, t);
};

/**
  @param {number} a .
  @param {number} b .
  @param {number} c .
  @param {number} d .
  @param {number} x .
  @param {number} s .
  @param {number} t .
  @return {number} .
  @private
*/
md5.hh_ = function hh_(a, b, c, d, x, s, t) {
  return md5.cmn_(b ^ c ^ d, a, b, x, s, t);
};

/**
  @param {number} a .
  @param {number} b .
  @param {number} c .
  @param {number} d .
  @param {number} x .
  @param {number} s .
  @param {number} t .
  @return {number} .
  @private
*/
md5.ii_ = function ii_(a, b, c, d, x, s, t) {
  return md5.cmn_(c ^ (b | (~d)), a, b, x, s, t);
};

/**
  @param {number} x .
  @param {number} y .
  @return {number} .
  @private
*/
md5.safe_add_ = function safe_add_(x, y) {
  var lsw = (x & 0xFFFF) + (y & 0xFFFF);
  var msw = (x >> 16) + (y >> 16) + (lsw >> 16);
  return (msw << 16) | (lsw & 0xFFFF);
};

/**
  @param {number} num .
  @param {number} cnt .
  @return {number} .
  @private
*/
md5.bit_rol_ = function bit_rol_(num, cnt) {
  return (num << cnt) | (num >>> (32 - cnt));
};

/**
  @param {string} str .
  @return {Array.<number>} .
  @private
*/
md5.str2binl_ = function str2binl_(str) {
  var bin = Array();
  var mask = (1 << md5.chrsz_) - 1;
  for (var i = 0; i < str.length * md5.chrsz_; i += md5.chrsz_)
    bin[i >> 5] |= (str.charCodeAt(i / md5.chrsz_) & mask) << (i % 32);
  return bin;
};

/**
  @param {Array.<number>} binarray .
  @return {string} .
  @private
*/
md5.binl2b64_ = function binl2b64_(binarray) {
  var str = '';

  for (var i = 0; i < binarray.length * 4; i += 3)
  {
    var triplet = (((binarray[i >> 2] >> 8 * (i % 4)) & 0xFF) << 16) |
                (((binarray[i + 1 >> 2] >> 8 * ((i + 1) % 4)) & 0xFF) << 8) |
                ((binarray[i + 2 >> 2] >> 8 * ((i + 2) % 4)) & 0xFF);
    for (var j = 0; j < 4; j++)
    {
      if (i * 8 + j * 6 > binarray.length * 32) str += md5.b64pad_;
      else str += md5.tab_.charAt((triplet >> 6 * (3 - j)) & 0x3F);
    }
  }
  return str;
};

var oplop = {};

/**
  Convert a Latin-1 string to UTF-8.

    @param {!string} text Latin-1 string.
    @return {!string} UTF-8 string.
    @private
*/
oplop.latin1_to_utf8_ = function latin1_to_utf8(text) {
    var converted = new Array();

    for (var x = 0; x < text.length; x += 1) {
        var code_point = text.charCodeAt(x);

        if (code_point < 128) {
            converted.push(String.fromCharCode(code_point));
        }
        else {
            var first = 0xc0 | code_point >> 6;
            var second = 0x80 | code_point & 0x3f;

            converted.push(String.fromCharCode(first, second));
        }
    }

    return converted.join('');
};

/**
  Create an account password.

    @param {!string} nickname Nickname.
    @param {!string} master Master password.
    @return {!string} Account password.
*/
oplop.accountPassword = function(nickname, master) {
    var length = 8;
    var utf8_master = oplop.latin1_to_utf8_(master);
    var utf8_nickname = oplop.latin1_to_utf8_(nickname);

    var created_password = md5.urlsafe_base64(utf8_master + utf8_nickname);

    var digit_regex = /\d+/;
    var digit_pos = created_password.search(digit_regex);

    if (digit_pos < 0) {  // No digit found.
        created_password = '1' + created_password;
    }
    else if (digit_pos >= length) {  // Digit outside of final password.
        var digit = created_password.match(digit_regex);
        created_password = digit + created_password;
    }

    return created_password.substring(0, length);
};