var hexcase = 0;
var b64pad = "";
var chrsz = 8;

function obs(s) {
  return b2h(cmc5(s2b(s), s.length * chrsz))
}

function b64_md5(s) {
  return binl2b64(cmc5(s2b(s), s.length * chrsz))
}

function str_md5(s) {
  return binl2str(cmc5(s2b(s), s.length * chrsz))
}

function hex_hmac_md5(a, b) {
  return b2h(core_hmac_md5(a, b))
}

function b64_hmac_md5(a, b) {
  return binl2b64(core_hmac_md5(a, b))
}

function str_hmac_md5(a, b) {
  return binl2str(core_hmac_md5(a, b))
}

function cmc5(x, e) {
  x[e >> 5] |= 0x80 << ((e) % 32);
  x[(((e + 64) >>> 9) << 4) + 14] = e;
  var a = 1732584193;
  var b = -271733879;
  var c = -1732584194;
  var d = 271733878;
  for (var i = 0; i < x.length; i += 16) {
    var f = a;
    var g = b;
    var h = c;
    var j = 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 = safe_add(a, f);
    b = safe_add(b, g);
    c = safe_add(c, h);
    d = safe_add(d, j)
  }
  return Array(a, b, c, d)
}

function md5_cmn(q, a, b, x, s, t) {
  return safe_add(bit_rol(safe_add(safe_add(a, q), safe_add(x, t)), s), b)
}

function md5_ff(a, b, c, d, x, s, t) {
  return md5_cmn((b & c) | ((~b) & d), a, b, x, s, t)
}

function md5_gg(a, b, c, d, x, s, t) {
  return md5_cmn((b & d) | (c & (~d)), a, b, x, s, t)
}

function md5_hh(a, b, c, d, x, s, t) {
  return md5_cmn(b ^ c ^ d, a, b, x, s, t)
}

function md5_ii(a, b, c, d, x, s, t) {
  return md5_cmn(c ^ (b | (~d)), a, b, x, s, t)
}

function core_hmac_md5(a, b) {
  var c = s2b(a);
  if (c.length > 16) c = cmc5(c, a.length * chrsz);
  var d = Array(16),
	opad = Array(16);
  for (var i = 0; i < 16; i++) {
    d[i] = c[i] ^ 0x36363636;
    opad[i] = c[i] ^ 0x5C5C5C5C
  }
  var e = cmc5(d.concat(s2b(b)), 512 + b.length * chrsz);
  return cmc5(opad.concat(e), 512 + 128)
}

function safe_add(x, y) {
  var a = (x & 0xFFFF) + (y & 0xFFFF);
  var b = (x >> 16) + (y >> 16) + (a >> 16);
  return (b << 16) | (a & 0xFFFF)
}

function bit_rol(a, b) {
  return (a << b) | (a >>> (32 - b))
}

function s2b(a) {
  var b = Array();
  var c = (1 << chrsz) - 1;
  for (var i = 0; i < a.length * chrsz; i += chrsz) b[i >> 5] |= (a.charCodeAt(i / chrsz) & c) << (i % 32);
  return b
}

function binl2str(a) {
  var b = "";
  var c = (1 << chrsz) - 1;
  for (var i = 0; i < a.length * 32; i += chrsz) b += String.fromCharCode((a[i >> 5] >>> (i % 32)) & c);
  return b
}

function b2h(a) {
  var b = hexcase ? "0123456789ABCDEF" : "0123456789abcdef";
  var c = "";
  for (var i = 0; i < a.length * 4; i++) {
    c += b.charAt((a[i >> 2] >> ((i % 4) * 8 + 4)) & 0xF) + b.charAt((a[i >> 2] >> ((i % 4) * 8)) & 0xF)
  }
  return c
}

function binl2b64(a) {
  var b = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
  var c = "";
  for (var i = 0; i < a.length * 4; i += 3) {
    var d = (((a[i >> 2] >> 8 * (i % 4)) & 0xFF) << 16) | (((a[i + 1 >> 2] >> 8 * ((i + 1) % 4)) & 0xFF) << 8) | ((a[i + 2 >> 2] >> 8 * ((i + 2) % 4)) & 0xFF);
    for (var j = 0; j < 4; j++) {
      if (i * 8 + j * 6 > a.length * 32) c += b64pad;
      else c += b.charAt((d >> 6 * (3 - j)) & 0x3F)
    }
  }
  return c
}