DataGreed/decrypt_message.js

## decrypt_message.js
export default (request) => {

    console.log('--------------------------------------------START')

////////////////////////////////
// ---------- external modules

// sha256
function SHA256(s){
 var chrsz  = 8;
 var hexcase = 0;
 function safe_add (x, y) {
 var lsw = (x & 0xFFFF) + (y & 0xFFFF);
 var msw = (x >> 16) + (y >> 16) + (lsw >> 16);
 return (msw << 16) | (lsw & 0xFFFF);
 }
 function S (X, n) { return ( X >>> n ) | (X << (32 - n)); }
 function R (X, n) { return ( X >>> n ); }
 function Ch(x, y, z) { return ((x & y) ^ ((~x) & z)); }
 function Maj(x, y, z) { return ((x & y) ^ (x & z) ^ (y & z)); }
 function Sigma0256(x) { return (S(x, 2) ^ S(x, 13) ^ S(x, 22)); }
 function Sigma1256(x) { return (S(x, 6) ^ S(x, 11) ^ S(x, 25)); }
 function Gamma0256(x) { return (S(x, 7) ^ S(x, 18) ^ R(x, 3)); }
 function Gamma1256(x) { return (S(x, 17) ^ S(x, 19) ^ R(x, 10)); }
 function core_sha256 (m, l) {
 var K = new Array(0x428A2F98, 0x71374491, 0xB5C0FBCF, 0xE9B5DBA5, 0x3956C25B, 0x59F111F1, 0x923F82A4, 0xAB1C5ED5, 0xD807AA98, 0x12835B01, 0x243185BE, 0x550C7DC3, 0x72BE5D74, 0x80DEB1FE, 0x9BDC06A7, 0xC19BF174, 0xE49B69C1, 0xEFBE4786, 0xFC19DC6, 0x240CA1CC, 0x2DE92C6F, 0x4A7484AA, 0x5CB0A9DC, 0x76F988DA, 0x983E5152, 0xA831C66D, 0xB00327C8, 0xBF597FC7, 0xC6E00BF3, 0xD5A79147, 0x6CA6351, 0x14292967, 0x27B70A85, 0x2E1B2138, 0x4D2C6DFC, 0x53380D13, 0x650A7354, 0x766A0ABB, 0x81C2C92E, 0x92722C85, 0xA2BFE8A1, 0xA81A664B, 0xC24B8B70, 0xC76C51A3, 0xD192E819, 0xD6990624, 0xF40E3585, 0x106AA070, 0x19A4C116, 0x1E376C08, 0x2748774C, 0x34B0BCB5, 0x391C0CB3, 0x4ED8AA4A, 0x5B9CCA4F, 0x682E6FF3, 0x748F82EE, 0x78A5636F, 0x84C87814, 0x8CC70208, 0x90BEFFFA, 0xA4506CEB, 0xBEF9A3F7, 0xC67178F2);
 var HASH = new Array(0x6A09E667, 0xBB67AE85, 0x3C6EF372, 0xA54FF53A, 0x510E527F, 0x9B05688C, 0x1F83D9AB, 0x5BE0CD19);
 var W = new Array(64);
 var a, b, c, d, e, f, g, h, i, j;
 var T1, T2;
 m[l >> 5] |= 0x80 << (24 - l % 32);
 m[((l + 64 >> 9) << 4) + 15] = l;
 for ( var i = 0; i<m.length; i+=16 ) {
 a = HASH[0];
 b = HASH[1];
 c = HASH[2];
 d = HASH[3];
 e = HASH[4];
 f = HASH[5];
 g = HASH[6];
 h = HASH[7];
 for ( var j = 0; j<64; j++) {
 if (j < 16) W[j] = m[j + i];
 else W[j] = safe_add(safe_add(safe_add(Gamma1256(W[j - 2]), W[j - 7]), Gamma0256(W[j - 15])), W[j - 16]);
 T1 = safe_add(safe_add(safe_add(safe_add(h, Sigma1256(e)), Ch(e, f, g)), K[j]), W[j]);
 T2 = safe_add(Sigma0256(a), Maj(a, b, c));
 h = g;
 g = f;
 f = e;
 e = safe_add(d, T1);
 d = c;
 c = b;
 b = a;
 a = safe_add(T1, T2);
 }
 HASH[0] = safe_add(a, HASH[0]);
 HASH[1] = safe_add(b, HASH[1]);
 HASH[2] = safe_add(c, HASH[2]);
 HASH[3] = safe_add(d, HASH[3]);
 HASH[4] = safe_add(e, HASH[4]);
 HASH[5] = safe_add(f, HASH[5]);
 HASH[6] = safe_add(g, HASH[6]);
 HASH[7] = safe_add(h, HASH[7]);
 }
 return HASH;
 }
 function str2binb (str) {
 var bin = Array();
 var mask = (1 << chrsz) - 1;
 for(var i = 0; i < str.length * chrsz; i += chrsz) {
 bin[i>>5] |= (str.charCodeAt(i / chrsz) & mask) << (24 - i%32);
 }
 return bin;
 }
 function Utf8Encode(string) {
 string = string.replace(/\r\n/g,"\n");
 var utftext = "";
 for (var n = 0; n < string.length; n++) {
 var c = string.charCodeAt(n);
 if (c < 128) {
 utftext += String.fromCharCode(c);
 }
 else if((c > 127) && (c < 2048)) {
 utftext += String.fromCharCode((c >> 6) | 192);
 utftext += String.fromCharCode((c & 63) | 128);
 }
 else {
 utftext += String.fromCharCode((c >> 12) | 224);
 utftext += String.fromCharCode(((c >> 6) & 63) | 128);
 utftext += String.fromCharCode((c & 63) | 128);
 }
 }
 return utftext;
 }
 function binb2hex (binarray) {
 var hex_tab = hexcase ? "0123456789ABCDEF" : "0123456789abcdef";
 var str = "";
 for(var i = 0; i < binarray.length * 4; i++) {
 str += hex_tab.charAt((binarray[i>>2] >> ((3 - i%4)*8+4)) & 0xF) +
 hex_tab.charAt((binarray[i>>2] >> ((3 - i%4)*8 )) & 0xF);
 }
 return str;
 }
 s = Utf8Encode(s);
 return binb2hex(core_sha256(str2binb(s), s.length * chrsz));
}
// ---- end sha256


/////////////////////////////////
// --- AES lib

/*
 CryptoJS v3.1.2
 code.google.com/p/crypto-js
 (c) 2009-2013 by Jeff Mott. All rights reserved.
 code.google.com/p/crypto-js/wiki/License
 */
var CryptoJS=CryptoJS||function(h,s){var f={},g=f.lib={},q=function(){},m=g.Base={extend:function(a){q.prototype=this;var c=new q;a&&c.mixIn(a);c.hasOwnProperty("init")||(c.init=function(){c.$super.init.apply(this,arguments)});c.init.prototype=c;c.$super=this;return c},create:function(){var a=this.extend();a.init.apply(a,arguments);return a},init:function(){},mixIn:function(a){for(var c in a)a.hasOwnProperty(c)&&(this[c]=a[c]);a.hasOwnProperty("toString")&&(this.toString=a.toString)},clone:function(){return this.init.prototype.extend(this)}},
    r=g.WordArray=m.extend({init:function(a,c){a=this.words=a||[];this.sigBytes=c!=s?c:4*a.length},toString:function(a){return(a||k).stringify(this)},concat:function(a){var c=this.words,d=a.words,b=this.sigBytes;a=a.sigBytes;this.clamp();if(b%4)for(var e=0;e<a;e++)c[b+e>>>2]|=(d[e>>>2]>>>24-8*(e%4)&255)<<24-8*((b+e)%4);else if(65535<d.length)for(e=0;e<a;e+=4)c[b+e>>>2]=d[e>>>2];else c.push.apply(c,d);this.sigBytes+=a;return this},clamp:function(){var a=this.words,c=this.sigBytes;a[c>>>2]&=4294967295<<
      32-8*(c%4);a.length=h.ceil(c/4)},clone:function(){var a=m.clone.call(this);a.words=this.words.slice(0);return a},random:function(a){for(var c=[],d=0;d<a;d+=4)c.push(4294967296*h.random()|0);return new r.init(c,a)}}),l=f.enc={},k=l.Hex={stringify:function(a){var c=a.words;a=a.sigBytes;for(var d=[],b=0;b<a;b++){var e=c[b>>>2]>>>24-8*(b%4)&255;d.push((e>>>4).toString(16));d.push((e&15).toString(16))}return d.join("")},parse:function(a){for(var c=a.length,d=[],b=0;b<c;b+=2)d[b>>>3]|=parseInt(a.substr(b,
        2),16)<<24-4*(b%8);return new r.init(d,c/2)}},n=l.Latin1={stringify:function(a){var c=a.words;a=a.sigBytes;for(var d=[],b=0;b<a;b++)d.push(String.fromCharCode(c[b>>>2]>>>24-8*(b%4)&255));return d.join("")},parse:function(a){for(var c=a.length,d=[],b=0;b<c;b++)d[b>>>2]|=(a.charCodeAt(b)&255)<<24-8*(b%4);return new r.init(d,c)}},j=l.Utf8={stringify:function(a){try{return decodeURIComponent(escape(n.stringify(a)))}catch(c){throw Error("Malformed UTF-8 data");}},parse:function(a){return n.parse(unescape(encodeURIComponent(a)))}},
    u=g.BufferedBlockAlgorithm=m.extend({reset:function(){this._data=new r.init;this._nDataBytes=0},_append:function(a){"string"==typeof a&&(a=j.parse(a));this._data.concat(a);this._nDataBytes+=a.sigBytes},_process:function(a){var c=this._data,d=c.words,b=c.sigBytes,e=this.blockSize,f=b/(4*e),f=a?h.ceil(f):h.max((f|0)-this._minBufferSize,0);a=f*e;b=h.min(4*a,b);if(a){for(var g=0;g<a;g+=e)this._doProcessBlock(d,g);g=d.splice(0,a);c.sigBytes-=b}return new r.init(g,b)},clone:function(){var a=m.clone.call(this);
      a._data=this._data.clone();return a},_minBufferSize:0});g.Hasher=u.extend({cfg:m.extend(),init:function(a){this.cfg=this.cfg.extend(a);this.reset()},reset:function(){u.reset.call(this);this._doReset()},update:function(a){this._append(a);this._process();return this},finalize:function(a){a&&this._append(a);return this._doFinalize()},blockSize:16,_createHelper:function(a){return function(c,d){return(new a.init(d)).finalize(c)}},_createHmacHelper:function(a){return function(c,d){return(new t.HMAC.init(a,
    d)).finalize(c)}}});var t=f.algo={};return f}(Math);

// SHA256
(function(h){for(var s=CryptoJS,f=s.lib,g=f.WordArray,q=f.Hasher,f=s.algo,m=[],r=[],l=function(a){return 4294967296*(a-(a|0))|0},k=2,n=0;64>n;){var j;a:{j=k;for(var u=h.sqrt(j),t=2;t<=u;t++)if(!(j%t)){j=!1;break a}j=!0}j&&(8>n&&(m[n]=l(h.pow(k,0.5))),r[n]=l(h.pow(k,1/3)),n++);k++}var a=[],f=f.SHA256=q.extend({_doReset:function(){this._hash=new g.init(m.slice(0))},_doProcessBlock:function(c,d){for(var b=this._hash.words,e=b[0],f=b[1],g=b[2],j=b[3],h=b[4],m=b[5],n=b[6],q=b[7],p=0;64>p;p++){if(16>p)a[p]=
  c[d+p]|0;else{var k=a[p-15],l=a[p-2];a[p]=((k<<25|k>>>7)^(k<<14|k>>>18)^k>>>3)+a[p-7]+((l<<15|l>>>17)^(l<<13|l>>>19)^l>>>10)+a[p-16]}k=q+((h<<26|h>>>6)^(h<<21|h>>>11)^(h<<7|h>>>25))+(h&m^~h&n)+r[p]+a[p];l=((e<<30|e>>>2)^(e<<19|e>>>13)^(e<<10|e>>>22))+(e&f^e&g^f&g);q=n;n=m;m=h;h=j+k|0;j=g;g=f;f=e;e=k+l|0}b[0]=b[0]+e|0;b[1]=b[1]+f|0;b[2]=b[2]+g|0;b[3]=b[3]+j|0;b[4]=b[4]+h|0;b[5]=b[5]+m|0;b[6]=b[6]+n|0;b[7]=b[7]+q|0},_doFinalize:function(){var a=this._data,d=a.words,b=8*this._nDataBytes,e=8*a.sigBytes;
  d[e>>>5]|=128<<24-e%32;d[(e+64>>>9<<4)+14]=h.floor(b/4294967296);d[(e+64>>>9<<4)+15]=b;a.sigBytes=4*d.length;this._process();return this._hash},clone:function(){var a=q.clone.call(this);a._hash=this._hash.clone();return a}});s.SHA256=q._createHelper(f);s.HmacSHA256=q._createHmacHelper(f)})(Math);

// HMAC SHA256
(function(){var h=CryptoJS,s=h.enc.Utf8;h.algo.HMAC=h.lib.Base.extend({init:function(f,g){f=this._hasher=new f.init;"string"==typeof g&&(g=s.parse(g));var h=f.blockSize,m=4*h;g.sigBytes>m&&(g=f.finalize(g));g.clamp();for(var r=this._oKey=g.clone(),l=this._iKey=g.clone(),k=r.words,n=l.words,j=0;j<h;j++)k[j]^=1549556828,n[j]^=909522486;r.sigBytes=l.sigBytes=m;this.reset()},reset:function(){var f=this._hasher;f.reset();f.update(this._iKey)},update:function(f){this._hasher.update(f);return this},finalize:function(f){var g=
  this._hasher;f=g.finalize(f);g.reset();return g.finalize(this._oKey.clone().concat(f))}})})();

// Base64
(function(){var u=CryptoJS,p=u.lib.WordArray;u.enc.Base64={stringify:function(d){var l=d.words,p=d.sigBytes,t=this._map;d.clamp();d=[];for(var r=0;r<p;r+=3)for(var w=(l[r>>>2]>>>24-8*(r%4)&255)<<16|(l[r+1>>>2]>>>24-8*((r+1)%4)&255)<<8|l[r+2>>>2]>>>24-8*((r+2)%4)&255,v=0;4>v&&r+0.75*v<p;v++)d.push(t.charAt(w>>>6*(3-v)&63));if(l=t.charAt(64))for(;d.length%4;)d.push(l);return d.join("")},parse:function(d){var l=d.length,s=this._map,t=s.charAt(64);t&&(t=d.indexOf(t),-1!=t&&(l=t));for(var t=[],r=0,w=0;w<
l;w++)if(w%4){var v=s.indexOf(d.charAt(w-1))<<2*(w%4),b=s.indexOf(d.charAt(w))>>>6-2*(w%4);t[r>>>2]|=(v|b)<<24-8*(r%4);r++}return p.create(t,r)},_map:"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/="}})();

// BlockCipher
(function(u){function p(b,n,a,c,e,j,k){b=b+(n&a|~n&c)+e+k;return(b<<j|b>>>32-j)+n}function d(b,n,a,c,e,j,k){b=b+(n&c|a&~c)+e+k;return(b<<j|b>>>32-j)+n}function l(b,n,a,c,e,j,k){b=b+(n^a^c)+e+k;return(b<<j|b>>>32-j)+n}function s(b,n,a,c,e,j,k){b=b+(a^(n|~c))+e+k;return(b<<j|b>>>32-j)+n}for(var t=CryptoJS,r=t.lib,w=r.WordArray,v=r.Hasher,r=t.algo,b=[],x=0;64>x;x++)b[x]=4294967296*u.abs(u.sin(x+1))|0;r=r.MD5=v.extend({_doReset:function(){this._hash=new w.init([1732584193,4023233417,2562383102,271733878])},
  _doProcessBlock:function(q,n){for(var a=0;16>a;a++){var c=n+a,e=q[c];q[c]=(e<<8|e>>>24)&16711935|(e<<24|e>>>8)&4278255360}var a=this._hash.words,c=q[n+0],e=q[n+1],j=q[n+2],k=q[n+3],z=q[n+4],r=q[n+5],t=q[n+6],w=q[n+7],v=q[n+8],A=q[n+9],B=q[n+10],C=q[n+11],u=q[n+12],D=q[n+13],E=q[n+14],x=q[n+15],f=a[0],m=a[1],g=a[2],h=a[3],f=p(f,m,g,h,c,7,b[0]),h=p(h,f,m,g,e,12,b[1]),g=p(g,h,f,m,j,17,b[2]),m=p(m,g,h,f,k,22,b[3]),f=p(f,m,g,h,z,7,b[4]),h=p(h,f,m,g,r,12,b[5]),g=p(g,h,f,m,t,17,b[6]),m=p(m,g,h,f,w,22,b[7]),
    f=p(f,m,g,h,v,7,b[8]),h=p(h,f,m,g,A,12,b[9]),g=p(g,h,f,m,B,17,b[10]),m=p(m,g,h,f,C,22,b[11]),f=p(f,m,g,h,u,7,b[12]),h=p(h,f,m,g,D,12,b[13]),g=p(g,h,f,m,E,17,b[14]),m=p(m,g,h,f,x,22,b[15]),f=d(f,m,g,h,e,5,b[16]),h=d(h,f,m,g,t,9,b[17]),g=d(g,h,f,m,C,14,b[18]),m=d(m,g,h,f,c,20,b[19]),f=d(f,m,g,h,r,5,b[20]),h=d(h,f,m,g,B,9,b[21]),g=d(g,h,f,m,x,14,b[22]),m=d(m,g,h,f,z,20,b[23]),f=d(f,m,g,h,A,5,b[24]),h=d(h,f,m,g,E,9,b[25]),g=d(g,h,f,m,k,14,b[26]),m=d(m,g,h,f,v,20,b[27]),f=d(f,m,g,h,D,5,b[28]),h=d(h,f,
      m,g,j,9,b[29]),g=d(g,h,f,m,w,14,b[30]),m=d(m,g,h,f,u,20,b[31]),f=l(f,m,g,h,r,4,b[32]),h=l(h,f,m,g,v,11,b[33]),g=l(g,h,f,m,C,16,b[34]),m=l(m,g,h,f,E,23,b[35]),f=l(f,m,g,h,e,4,b[36]),h=l(h,f,m,g,z,11,b[37]),g=l(g,h,f,m,w,16,b[38]),m=l(m,g,h,f,B,23,b[39]),f=l(f,m,g,h,D,4,b[40]),h=l(h,f,m,g,c,11,b[41]),g=l(g,h,f,m,k,16,b[42]),m=l(m,g,h,f,t,23,b[43]),f=l(f,m,g,h,A,4,b[44]),h=l(h,f,m,g,u,11,b[45]),g=l(g,h,f,m,x,16,b[46]),m=l(m,g,h,f,j,23,b[47]),f=s(f,m,g,h,c,6,b[48]),h=s(h,f,m,g,w,10,b[49]),g=s(g,h,f,m,
      E,15,b[50]),m=s(m,g,h,f,r,21,b[51]),f=s(f,m,g,h,u,6,b[52]),h=s(h,f,m,g,k,10,b[53]),g=s(g,h,f,m,B,15,b[54]),m=s(m,g,h,f,e,21,b[55]),f=s(f,m,g,h,v,6,b[56]),h=s(h,f,m,g,x,10,b[57]),g=s(g,h,f,m,t,15,b[58]),m=s(m,g,h,f,D,21,b[59]),f=s(f,m,g,h,z,6,b[60]),h=s(h,f,m,g,C,10,b[61]),g=s(g,h,f,m,j,15,b[62]),m=s(m,g,h,f,A,21,b[63]);a[0]=a[0]+f|0;a[1]=a[1]+m|0;a[2]=a[2]+g|0;a[3]=a[3]+h|0},_doFinalize:function(){var b=this._data,n=b.words,a=8*this._nDataBytes,c=8*b.sigBytes;n[c>>>5]|=128<<24-c%32;var e=u.floor(a/
    4294967296);n[(c+64>>>9<<4)+15]=(e<<8|e>>>24)&16711935|(e<<24|e>>>8)&4278255360;n[(c+64>>>9<<4)+14]=(a<<8|a>>>24)&16711935|(a<<24|a>>>8)&4278255360;b.sigBytes=4*(n.length+1);this._process();b=this._hash;n=b.words;for(a=0;4>a;a++)c=n[a],n[a]=(c<<8|c>>>24)&16711935|(c<<24|c>>>8)&4278255360;return b},clone:function(){var b=v.clone.call(this);b._hash=this._hash.clone();return b}});t.MD5=v._createHelper(r);t.HmacMD5=v._createHmacHelper(r)})(Math);
(function(){var u=CryptoJS,p=u.lib,d=p.Base,l=p.WordArray,p=u.algo,s=p.EvpKDF=d.extend({cfg:d.extend({keySize:4,hasher:p.MD5,iterations:1}),init:function(d){this.cfg=this.cfg.extend(d)},compute:function(d,r){for(var p=this.cfg,s=p.hasher.create(),b=l.create(),u=b.words,q=p.keySize,p=p.iterations;u.length<q;){n&&s.update(n);var n=s.update(d).finalize(r);s.reset();for(var a=1;a<p;a++)n=s.finalize(n),s.reset();b.concat(n)}b.sigBytes=4*q;return b}});u.EvpKDF=function(d,l,p){return s.create(p).compute(d,
  l)}})();

// Cipher
CryptoJS.lib.Cipher||function(u){var p=CryptoJS,d=p.lib,l=d.Base,s=d.WordArray,t=d.BufferedBlockAlgorithm,r=p.enc.Base64,w=p.algo.EvpKDF,v=d.Cipher=t.extend({cfg:l.extend(),createEncryptor:function(e,a){return this.create(this._ENC_XFORM_MODE,e,a)},createDecryptor:function(e,a){return this.create(this._DEC_XFORM_MODE,e,a)},init:function(e,a,b){this.cfg=this.cfg.extend(b);this._xformMode=e;this._key=a;this.reset()},reset:function(){t.reset.call(this);this._doReset()},process:function(e){this._append(e);return this._process()},
  finalize:function(e){e&&this._append(e);return this._doFinalize()},keySize:4,ivSize:4,_ENC_XFORM_MODE:1,_DEC_XFORM_MODE:2,_createHelper:function(e){return{encrypt:function(b,k,d){return("string"==typeof k?c:a).encrypt(e,b,k,d)},decrypt:function(b,k,d){return("string"==typeof k?c:a).decrypt(e,b,k,d)}}}});d.StreamCipher=v.extend({_doFinalize:function(){return this._process(!0)},blockSize:1});var b=p.mode={},x=function(e,a,b){var c=this._iv;c?this._iv=u:c=this._prevBlock;for(var d=0;d<b;d++)e[a+d]^=
  c[d]},q=(d.BlockCipherMode=l.extend({createEncryptor:function(e,a){return this.Encryptor.create(e,a)},createDecryptor:function(e,a){return this.Decryptor.create(e,a)},init:function(e,a){this._cipher=e;this._iv=a}})).extend();q.Encryptor=q.extend({processBlock:function(e,a){var b=this._cipher,c=b.blockSize;x.call(this,e,a,c);b.encryptBlock(e,a);this._prevBlock=e.slice(a,a+c)}});q.Decryptor=q.extend({processBlock:function(e,a){var b=this._cipher,c=b.blockSize,d=e.slice(a,a+c);b.decryptBlock(e,a);x.call(this,
  e,a,c);this._prevBlock=d}});b=b.CBC=q;q=(p.pad={}).Pkcs7={pad:function(a,b){for(var c=4*b,c=c-a.sigBytes%c,d=c<<24|c<<16|c<<8|c,l=[],n=0;n<c;n+=4)l.push(d);c=s.create(l,c);a.concat(c)},unpad:function(a){a.sigBytes-=a.words[a.sigBytes-1>>>2]&255}};d.BlockCipher=v.extend({cfg:v.cfg.extend({mode:b,padding:q}),reset:function(){v.reset.call(this);var a=this.cfg,b=a.iv,a=a.mode;if(this._xformMode==this._ENC_XFORM_MODE)var c=a.createEncryptor;else c=a.createDecryptor,this._minBufferSize=1;this._mode=c.call(a,
  this,b&&b.words)},_doProcessBlock:function(a,b){this._mode.processBlock(a,b)},_doFinalize:function(){var a=this.cfg.padding;if(this._xformMode==this._ENC_XFORM_MODE){a.pad(this._data,this.blockSize);var b=this._process(!0)}else b=this._process(!0),a.unpad(b);return b},blockSize:4});var n=d.CipherParams=l.extend({init:function(a){this.mixIn(a)},toString:function(a){return(a||this.formatter).stringify(this)}}),b=(p.format={}).OpenSSL={stringify:function(a){var b=a.ciphertext;a=a.salt;return(a?s.create([1398893684,
  1701076831]).concat(a).concat(b):b).toString(r)},parse:function(a){a=r.parse(a);var b=a.words;if(1398893684==b[0]&&1701076831==b[1]){var c=s.create(b.slice(2,4));b.splice(0,4);a.sigBytes-=16}return n.create({ciphertext:a,salt:c})}},a=d.SerializableCipher=l.extend({cfg:l.extend({format:b}),encrypt:function(a,b,c,d){d=this.cfg.extend(d);var l=a.createEncryptor(c,d);b=l.finalize(b);l=l.cfg;return n.create({ciphertext:b,key:c,iv:l.iv,algorithm:a,mode:l.mode,padding:l.padding,blockSize:a.blockSize,formatter:d.format})},
  decrypt:function(a,b,c,d){d=this.cfg.extend(d);b=this._parse(b,d.format);return a.createDecryptor(c,d).finalize(b.ciphertext)},_parse:function(a,b){return"string"==typeof a?b.parse(a,this):a}}),p=(p.kdf={}).OpenSSL={execute:function(a,b,c,d){d||(d=s.random(8));a=w.create({keySize:b+c}).compute(a,d);c=s.create(a.words.slice(b),4*c);a.sigBytes=4*b;return n.create({key:a,iv:c,salt:d})}},c=d.PasswordBasedCipher=a.extend({cfg:a.cfg.extend({kdf:p}),encrypt:function(b,c,d,l){l=this.cfg.extend(l);d=l.kdf.execute(d,
  b.keySize,b.ivSize);l.iv=d.iv;b=a.encrypt.call(this,b,c,d.key,l);b.mixIn(d);return b},decrypt:function(b,c,d,l){l=this.cfg.extend(l);c=this._parse(c,l.format);d=l.kdf.execute(d,b.keySize,b.ivSize,c.salt);l.iv=d.iv;return a.decrypt.call(this,b,c,d.key,l)}})}();

// AES
(function(){for(var u=CryptoJS,p=u.lib.BlockCipher,d=u.algo,l=[],s=[],t=[],r=[],w=[],v=[],b=[],x=[],q=[],n=[],a=[],c=0;256>c;c++)a[c]=128>c?c<<1:c<<1^283;for(var e=0,j=0,c=0;256>c;c++){var k=j^j<<1^j<<2^j<<3^j<<4,k=k>>>8^k&255^99;l[e]=k;s[k]=e;var z=a[e],F=a[z],G=a[F],y=257*a[k]^16843008*k;t[e]=y<<24|y>>>8;r[e]=y<<16|y>>>16;w[e]=y<<8|y>>>24;v[e]=y;y=16843009*G^65537*F^257*z^16843008*e;b[k]=y<<24|y>>>8;x[k]=y<<16|y>>>16;q[k]=y<<8|y>>>24;n[k]=y;e?(e=z^a[a[a[G^z]]],j^=a[a[j]]):e=j=1}var H=[0,1,2,4,8,
  16,32,64,128,27,54],d=d.AES=p.extend({_doReset:function(){for(var a=this._key,c=a.words,d=a.sigBytes/4,a=4*((this._nRounds=d+6)+1),e=this._keySchedule=[],j=0;j<a;j++)if(j<d)e[j]=c[j];else{var k=e[j-1];j%d?6<d&&4==j%d&&(k=l[k>>>24]<<24|l[k>>>16&255]<<16|l[k>>>8&255]<<8|l[k&255]):(k=k<<8|k>>>24,k=l[k>>>24]<<24|l[k>>>16&255]<<16|l[k>>>8&255]<<8|l[k&255],k^=H[j/d|0]<<24);e[j]=e[j-d]^k}c=this._invKeySchedule=[];for(d=0;d<a;d++)j=a-d,k=d%4?e[j]:e[j-4],c[d]=4>d||4>=j?k:b[l[k>>>24]]^x[l[k>>>16&255]]^q[l[k>>>
8&255]]^n[l[k&255]]},encryptBlock:function(a,b){this._doCryptBlock(a,b,this._keySchedule,t,r,w,v,l)},decryptBlock:function(a,c){var d=a[c+1];a[c+1]=a[c+3];a[c+3]=d;this._doCryptBlock(a,c,this._invKeySchedule,b,x,q,n,s);d=a[c+1];a[c+1]=a[c+3];a[c+3]=d},_doCryptBlock:function(a,b,c,d,e,j,l,f){for(var m=this._nRounds,g=a[b]^c[0],h=a[b+1]^c[1],k=a[b+2]^c[2],n=a[b+3]^c[3],p=4,r=1;r<m;r++)var q=d[g>>>24]^e[h>>>16&255]^j[k>>>8&255]^l[n&255]^c[p++],s=d[h>>>24]^e[k>>>16&255]^j[n>>>8&255]^l[g&255]^c[p++],t=
  d[k>>>24]^e[n>>>16&255]^j[g>>>8&255]^l[h&255]^c[p++],n=d[n>>>24]^e[g>>>16&255]^j[h>>>8&255]^l[k&255]^c[p++],g=q,h=s,k=t;q=(f[g>>>24]<<24|f[h>>>16&255]<<16|f[k>>>8&255]<<8|f[n&255])^c[p++];s=(f[h>>>24]<<24|f[k>>>16&255]<<16|f[n>>>8&255]<<8|f[g&255])^c[p++];t=(f[k>>>24]<<24|f[n>>>16&255]<<16|f[g>>>8&255]<<8|f[h&255])^c[p++];n=(f[n>>>24]<<24|f[g>>>16&255]<<16|f[h>>>8&255]<<8|f[k&255])^c[p++];a[b]=q;a[b+1]=s;a[b+2]=t;a[b+3]=n},keySize:8});u.AES=p._createHelper(d)})();

// Mode ECB
CryptoJS.mode.ECB = (function () {
  var ECB = CryptoJS.lib.BlockCipherMode.extend();

  ECB.Encryptor = ECB.extend({
    processBlock: function (words, offset) {
      this._cipher.encryptBlock(words, offset);
    }
  });

  ECB.Decryptor = ECB.extend({
    processBlock: function (words, offset) {
      this._cipher.decryptBlock(words, offset);
    }
  });

  return ECB;
}());

// --- end AES lib

////////////////////////////////
// ---------- HELPERS

function isEncrypted(message)
{
    return typeof message == "string"
}

function getKey()
{
    var key="CHANGE_THIS_KEY"

    console.log('key', key)

    return key
}

function decryptMessage(message, key)
{
    // partially refactored (to be uglier ironically) code from
    // https://github.com/pubnub/javascript/blob/master/src/core/components/cryptography/index.js

    let _defaultOptions = {
      encryptKey: true,
      keyEncoding: 'utf8',
      keyLength: 256,
      mode: 'cbc'
    }

    let _iv = '0123456789012345'
    let options = _defaultOptions

    function _getIV(options) {
        return (options.mode === 'cbc') ? CryptoJS.enc.Utf8.parse(_iv) : null;
    }

    function _getMode(options) {
        if (options.mode === 'ecb') {
          return CryptoJS.mode.ECB;
        } else {
          return CryptoJS.mode.CBC;
        }
      }

    function _decodeKey(key, options) {
        if (options.keyEncoding === 'base64') {
          return CryptoJS.enc.Base64.parse(key);
        } else if (options.keyEncoding === 'hex') {
          return CryptoJS.enc.Hex.parse(key);
        } else {
          return key;
        }
      }

    function _getPaddedKey(key, options) {
        key = _decodeKey(key, options);
        if (options.encryptKey) {
          return CryptoJS.enc.Utf8.parse(SHA256(key).slice(0, 32)); //FIXME: could be different implementation in crypto js
        } else {
          return key;
        }
      }


    //options = this._parseOptions(options);    //this was just some custom options validation
    let iv = _getIV(options);
    let mode = _getMode(options);
    let cipherKey = _getPaddedKey(key, options);

    try {
        let ciphertext = CryptoJS.enc.Base64.parse(message);
        let plainJSON = CryptoJS.AES.decrypt({ ciphertext }, cipherKey, { iv, mode }).toString(CryptoJS.enc.Utf8);
        console.log("plainJSON", plainJSON)
        let plaintext = JSON.parse(plainJSON);
        return plaintext;
    }catch(e) {
      console.error("Error while deciphering", e)
      return null;
    }


    // return CryptoJS.AES.decrypt(message, "key").toString(CryptoJS.enc.Utf8);
}


/////////////////////////////////////
// MAIN-----------------------------

    //const kvstore = require('kvstore');
    //const xhr = require('xhr');

    console.log('request',request); // Log the request envelope passed
    console.log('encrypted', isEncrypted(request.message))

    if (isEncrypted(request.message)) //naive check
    {
        var key = getKey();
        var decryptedMessage=decryptMessage(request.message, key)

        console.log('decryptedMessage', decryptedMessage)
    }


    console.log('--------------------------------------------END')


    return request.ok(); // Return a promise when you're done
}