I'm trying to base64 encode a utf8 string containing Thai characters. I'm using the browser's built in btoa function. It works for ascii text, however Thai is causing it to throw a INVALID_CHARACTER_ERR: DOM Exception 5 exception.
Here's a sample that fails (the character that looks like an "n" is Thai)
btoa('aก')
What do I need to do to base64 encode non-ascii strings?
var Base64 = {
encode: function(s) {
return btoa(unescape(encodeURIComponent(s)));
},
decode: function(s) {
return decodeURIComponent(escape(atob(s)));
}
};
Unfortunately btoa/atob aren't specified in any standard, but the implementations in firefox and webkit both fail on multibyte characters so even if they were now specified those builtin functions would not be able to support multibyte characters (as the input and output strings would necessarily change).
It would seem your only option would be to roll your own base64 encode+decode routines
check this workaround
http://ecmanaut.blogspot.com/2006/07/encoding-decoding-utf8-in-javascript.html
I know this is old, but I was recently looking for a UTF8-to-Base64 encoder as well. I found a handy little script at http://www.webtoolkit.info/javascript-base64.html, and a performance improved version at http://jsbase64.codeplex.com/.
Here is the script:
var B64 = {
alphabet: 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=',
lookup: null,
ie: /MSIE /.test(navigator.userAgent),
ieo: /MSIE [67]/.test(navigator.userAgent),
encode: function (s) {
var buffer = B64.toUtf8(s),
position = -1,
len = buffer.length,
nan0, nan1, nan2, enc = [, , , ];
if (B64.ie) {
var result = [];
while (++position < len) {
nan0 = buffer[position];
nan1 = buffer[++position];
enc[0] = nan0 >> 2;
enc[1] = ((nan0 & 3) << 4) | (nan1 >> 4);
if (isNaN(nan1))
enc[2] = enc[3] = 64;
else {
nan2 = buffer[++position];
enc[2] = ((nan1 & 15) << 2) | (nan2 >> 6);
enc[3] = (isNaN(nan2)) ? 64 : nan2 & 63;
}
result.push(B64.alphabet.charAt(enc[0]), B64.alphabet.charAt(enc[1]), B64.alphabet.charAt(enc[2]), B64.alphabet.charAt(enc[3]));
}
return result.join('');
} else {
var result = '';
while (++position < len) {
nan0 = buffer[position];
nan1 = buffer[++position];
enc[0] = nan0 >> 2;
enc[1] = ((nan0 & 3) << 4) | (nan1 >> 4);
if (isNaN(nan1))
enc[2] = enc[3] = 64;
else {
nan2 = buffer[++position];
enc[2] = ((nan1 & 15) << 2) | (nan2 >> 6);
enc[3] = (isNaN(nan2)) ? 64 : nan2 & 63;
}
result += B64.alphabet[enc[0]] + B64.alphabet[enc[1]] + B64.alphabet[enc[2]] + B64.alphabet[enc[3]];
}
return result;
}
},
decode: function (s) {
if (s.length % 4)
throw new Error("InvalidCharacterError: 'B64.decode' failed: The string to be decoded is not correctly encoded.");
var buffer = B64.fromUtf8(s),
position = 0,
len = buffer.length;
if (B64.ieo) {
var result = [];
while (position < len) {
if (buffer[position] < 128)
result.push(String.fromCharCode(buffer[position++]));
else if (buffer[position] > 191 && buffer[position] < 224)
result.push(String.fromCharCode(((buffer[position++] & 31) << 6) | (buffer[position++] & 63)));
else
result.push(String.fromCharCode(((buffer[position++] & 15) << 12) | ((buffer[position++] & 63) << 6) | (buffer[position++] & 63)));
}
return result.join('');
} else {
var result = '';
while (position < len) {
if (buffer[position] < 128)
result += String.fromCharCode(buffer[position++]);
else if (buffer[position] > 191 && buffer[position] < 224)
result += String.fromCharCode(((buffer[position++] & 31) << 6) | (buffer[position++] & 63));
else
result += String.fromCharCode(((buffer[position++] & 15) << 12) | ((buffer[position++] & 63) << 6) | (buffer[position++] & 63));
}
return result;
}
},
toUtf8: function (s) {
var position = -1,
len = s.length,
chr, buffer = [];
if (/^[\x00-\x7f]*$/.test(s)) while (++position < len)
buffer.push(s.charCodeAt(position));
else while (++position < len) {
chr = s.charCodeAt(position);
if (chr < 128)
buffer.push(chr);
else if (chr < 2048)
buffer.push((chr >> 6) | 192, (chr & 63) | 128);
else
buffer.push((chr >> 12) | 224, ((chr >> 6) & 63) | 128, (chr & 63) | 128);
}
return buffer;
},
fromUtf8: function (s) {
var position = -1,
len, buffer = [],
enc = [, , , ];
if (!B64.lookup) {
len = B64.alphabet.length;
B64.lookup = {};
while (++position < len)
B64.lookup[B64.alphabet.charAt(position)] = position;
position = -1;
}
len = s.length;
while (++position < len) {
enc[0] = B64.lookup[s.charAt(position)];
enc[1] = B64.lookup[s.charAt(++position)];
buffer.push((enc[0] << 2) | (enc[1] >> 4));
enc[2] = B64.lookup[s.charAt(++position)];
if (enc[2] == 64)
break;
buffer.push(((enc[1] & 15) << 4) | (enc[2] >> 2));
enc[3] = B64.lookup[s.charAt(++position)];
if (enc[3] == 64)
break;
buffer.push(((enc[2] & 3) << 6) | enc[3]);
}
return buffer;
}
};
Disclaimer: I haven't tested this with Thai characters specifically, but assume it will work.
Sav
Related
I'm trying control my huawei router using its web api, but some things are RSA encrypted. I have the public key, but I am struggling to find the algorithm they use to encrypt things.
The code they use is below:
function doRSAEncrypt(encstring) {
if (encstring == '') {
return '';
}
if (typeof (g_moduleswitch.encrypt_enabled) == 'undefined' || g_moduleswitch.encrypt_enabled != 1) {
return encstring;
}
if (g_encPublickey.e == '') {
if (true == g_scarm_login) {
var pubkeyArray = getPubkey();
g_encPublickey.e = pubkeyArray[1];
g_encPublickey.n = pubkeyArray[0];
} else {
getEncpubkey();
}
}
var rsa = new RSAKey();
rsa.setPublic(g_encPublickey.n, g_encPublickey.e);
encstring = base64_encode(encstring);
var num = encstring.length / 245;
var restotal = '';
for (i = 0; i < num; i++) {
var encdata = encstring.substr(i * 245, 245);
var res = rsa.encrypt(encdata);
restotal += res;
}
if (restotal.length % 256 != 0) {
restotal = doRSAEncrypt(encstring);
}
return restotal;
}
function parseBigInt(str, r) {
return new BigInteger(str, r);
}
// 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 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;
}
// protectedRSAKey.prototype.doPublic = RSADoPublic;
// publicRSAKey.prototype.setPublic = RSASetPublic;
RSAKey.prototype.encrypt = RSAEncrypt;
RSAKey.prototype.encrypt_b64 = RSAEncryptB64;
function base64_encode(input) {
_keyStr = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=";
var output = "";
var chr1, chr2, chr3, enc1, enc2, enc3, enc4;
var i = 0;
input = _utf8_encode(input);
while (i < input.length) {
chr1 = input.charCodeAt(i++);
chr2 = input.charCodeAt(i++);
chr3 = input.charCodeAt(i++);
enc1 = chr1 >> 2;
enc2 = ((chr1 & 3) << 4) | (chr2 >> 4);
enc3 = ((chr2 & 15) << 2) | (chr3 >> 6);
enc4 = chr3 & 63;
if (isNaN(chr2)) {
enc3 = enc4 = 64;
} else if (isNaN(chr3)) {
enc4 = 64;
}
output = output + this._keyStr.charAt(enc1) + this._keyStr.charAt(enc2) + this._keyStr.charAt(enc3) + this._keyStr.charAt(enc4);
}
return output;
}
function _utf8_encode(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;
}
For modulus 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
and exponent 010001 (both in hex) the string test123test yields 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 using their encryption.
I tried various RSA modes from Bouncycastle in Java like
RSA/ECB/OAEPWITHMD5ANDMGF1PADDING
RSA/ECB/OAEPWITHSHA1ANDMGF1PADDING
RSA/ECB/OAEPWITHSHA-256ANDMGF1PADDING
RSA/ECB/OAEPWITHSHA-384ANDMGF1PADDING
RSA/ECB/OAEPWITHSHA-512ANDMGF1PADDING
RSA/ECB/OAEPWithSHA-1AndMGF1Padding
RSA/ECB/PKCS1Padding
but none of them yielded the same result as the Huawei encrypt function did
import java.io.ByteArrayOutputStream
import java.math.BigInteger
import java.security.SecureRandom
import java.util.*
import kotlin.math.ceil
import kotlin.math.min
class RSAEncrypt(modulo: String, exponent: String) {
private val modulo = BigInteger(modulo, 16)
private val exponent = BigInteger(exponent, 16)
fun doRSAEncrypt(encstring: String): String {
val base64String = Base64.getEncoder().encodeToString(encstring.toByteArray())
val num = base64String.length / 245.0
var restotal = ""
for (i in 0 until ceil(num).toInt()) {
val encryptedData = base64String.substring(i * 245, min(245, base64String.length))
val res = this.encrypt(encryptedData);
restotal += res;
}
if (restotal.length % 256 !== 0) {
restotal = doRSAEncrypt(base64String)
}
return restotal
}
private fun pkcs1pad2(s: String, n: Int): BigInteger? {
if (n < s.length + 11) { // TODO: fix for utf-8
return null
}
var n = n
val ba = MutableList(n) { 0 }
var i = s.length - 1;
while (i >= 0 && n > 0) {
val c = Character.codePointAt(s, i--)
if (c < 128) { // encode using utf-8
ba[--n] = c;
} else if ((c > 127) && (c < 2048)) {
ba[--n] = (c and 63) or 128;
ba[--n] = (c shr 6) or 192;
} else {
ba[--n] = (c and 63) or 128;
ba[--n] = ((c shr 6) and 63) or 128;
ba[--n] = (c shr 12) or 224;
}
}
ba[--n] = 0;
val rng = SecureRandom()
val x = ByteArray(n) { 0 }
while (n > 2) {
x[0] = 0;
while (x[0].toInt() == 0) {
rng.nextBytes(x)
}
ba[--n] = x[0].toInt()
}
ba[--n] = 2;
ba[--n] = 0;
val baos = ByteArrayOutputStream()
for (item in ba) {
if (item < -128 || item > 127) {
throw Exception("You code is shit")
}
baos.write(item)
}
return BigInteger(baos.toByteArray())
}
private fun doPublic(x: BigInteger): BigInteger {
return x.modPow(this.exponent, this.modulo)
}
private fun encrypt(text: String): String? {
val maxLength = (this.modulo.bitLength() + 7) shr 3
val m = pkcs1pad2(text, maxLength) ?: return null
val c = this.doPublic(m)
var h = c.toString(16);
val length = h.length;
// fix zero before result
for (i in 0 until maxLength * 2 - length) {
h = "0$h";
}
return h
}
}
Implemented in Kotlin
I have a Sheets that contains text as défi (défi) or Österreich (Östereeich).
I can decode the first by this script, on the other hand I am not able to do the second (I mean the code takes 3 bytes)
Thanks for any help!
function decode(txt){
var texte = []
for (i=0;i<txt.length;i++){
var n = txt.substring(i,i+1).charCodeAt()
if (n>127){
if ((n & 32) > 0){
//texte.push(decode_utf8(txt.substring(i,i+3))) ??
i+=2
}
else{
texte.push(decode_utf8(txt.substring(i,i+2)))
i++
}
}
else{
texte.push(txt.substring(i,i+1))
}
}
return (texte.join(''))
}
function decode_utf8(s) {
return decodeURIComponent(escape(s));
}
Here is a solution ... based on github
function utf8decode(utftext) {
var string = "";
var i = 0;
var c = c1 = c2 = 0;
while ( i < utftext.length ) {
c = utftext.charCodeAt(i);
if (c < 128) {
string += String.fromCharCode(c);
i++;
}
else if((c > 191) && (c < 224)) {
c2 = utftext.charCodeAt(i+1);
string += String.fromCharCode(((c & 31) << 6) | (c2 & 63));
i += 2;
}
else {
c2 = utftext.charCodeAt(i+1);
c3 = utftext.charCodeAt(i+2);
string += String.fromCharCode(((c & 15) << 12) | ((c2 & 63) << 6) | (c3 & 63));
i += 3;
}
}
return string;
}
I am trying to store some strings into the database using their encoded format. But when retrieving back the string is malformed.
Here is my code example where you easily can see that String passed to encode is not the same as after decode. Why is this happening?
Is there any other library which can help me encoding and decoding? Any suggestion on the same will be helpful.
var Base64 = {
_keyStr : "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=",
encode : function(e) {
var t = "";
var n, r, i, s, o, u, a;
var f = 0;
e = Base64._utf8_encode(e);
while (f < e.length) {
n = e.charCodeAt(f++);
r = e.charCodeAt(f++);
i = e.charCodeAt(f++);
s = n >> 2;
o = (n & 3) << 4 | r >> 4;
u = (r & 15) << 2 | i >> 6;
a = i & 63;
if (isNaN(r)) {
u = a = 64
} else if (isNaN(i)) {
a = 64
}
t = t + this._keyStr.charAt(s) + this._keyStr.charAt(o)
+ this._keyStr.charAt(u) + this._keyStr.charAt(a)
}
return t
},
decode : function(e) {
var t = "";
var n, r, i;
var s, o, u, a;
var f = 0;
e = e.replace(/[^A-Za-z0-9+/=]/g, "");
while (f < e.length) {
s = this._keyStr.indexOf(e.charAt(f++));
o = this._keyStr.indexOf(e.charAt(f++));
u = this._keyStr.indexOf(e.charAt(f++));
a = this._keyStr.indexOf(e.charAt(f++));
n = s << 2 | o >> 4;
r = (o & 15) << 4 | u >> 2;
i = (u & 3) << 6 | a;
t = t + String.fromCharCode(n);
if (u != 64) {
t = t + String.fromCharCode(r)
}
if (a != 64) {
t = t + String.fromCharCode(i)
}
}
t = Base64._utf8_decode(t);
return t
},
_utf8_encode : function(e) {
e = e.replace(/rn/g, "n");
var t = "";
for (var n = 0; n < e.length; n++) {
var r = e.charCodeAt(n);
if (r < 128) {
t += String.fromCharCode(r)
} else if (r > 127 && r < 2048) {
t += String.fromCharCode(r >> 6 | 192);
t += String.fromCharCode(r & 63 | 128)
} else {
t += String.fromCharCode(r >> 12 | 224);
t += String.fromCharCode(r >> 6 & 63 | 128);
t += String.fromCharCode(r & 63 | 128)
}
}
return t
},
_utf8_decode : function(e) {
var t = "";
var n = 0;
var r = c1 = c2 = 0;
while (n < e.length) {
r = e.charCodeAt(n);
if (r < 128) {
t += String.fromCharCode(r);
n++
} else if (r > 191 && r < 224) {
c2 = e.charCodeAt(n + 1);
t += String.fromCharCode((r & 31) << 6 | c2 & 63);
n += 2
} else {
c2 = e.charCodeAt(n + 1);
c3 = e.charCodeAt(n + 2);
t += String.fromCharCode((r & 15) << 12 | (c2 & 63) << 6 | c3
& 63);
n += 3
}
}
return t
}
}
var str = "background:url(/drona-courses/player_assets/skin_0/DRONA_default_skinRightCorner.png) ;"
var encoded = Base64.encode(str);
//console.log(encoded);
var decoded = Base64.decode(encoded);
console.log(str,"......Input");
console.log(decoded,".....Output");
Base64 Encoding in common browsers
In JavaScript there are two functions respectively for decoding and encoding base64 strings:
atob()
btoa()
The atob() function decodes a string of data which has been encoded using base-64 encoding. Conversely, the btoa() function creates a base-64 encoded ASCII string from a "string" of binary data.
Use atob and btoa.
const foo = "bar"
const encodedFoo = btoa(foo)
const decodedFoo = atob(encodedFoo)
console.log(encodedFoo)
console.log(decodedFoo)
You can read more about it here.
I receive an id_token as part of my current href. It is encoded in base64. I try to decode it using atob(extractedIdToken), but get the following error:
Failed to execute 'atob' on 'Window': The string to be decoded is not correctly encoded
When I copy and paste the extracted id_token in my code and go to an online decoding site, it decodes correctly. Do you have suggestion?
I always use this to decode and encode in Base64, try it
var Base64 = {
_keyStr: "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=",
encode: function (e) {
var t = "";
var n, r, i, s, o, u, a;
var f = 0;
e = Base64._utf8_encode(e);
while (f < e.length) {
n = e.charCodeAt(f++);
r = e.charCodeAt(f++);
i = e.charCodeAt(f++);
s = n >> 2;
o = (n & 3) << 4 | r >> 4;
u = (r & 15) << 2 | i >> 6;
a = i & 63;
if (isNaN(r)) {
u = a = 64
} else if (isNaN(i)) {
a = 64
}
t = t + this._keyStr.charAt(s) + this._keyStr.charAt(o) + this._keyStr.charAt(u) + this._keyStr.charAt(a)
}
return t
},
decode: function (e) {
var t = "";
var n, r, i;
var s, o, u, a;
var f = 0;
e = e.replace(/[^A-Za-z0-9+/=]/g, "");
while (f < e.length) {
s = this._keyStr.indexOf(e.charAt(f++));
o = this._keyStr.indexOf(e.charAt(f++));
u = this._keyStr.indexOf(e.charAt(f++));
a = this._keyStr.indexOf(e.charAt(f++));
n = s << 2 | o >> 4;
r = (o & 15) << 4 | u >> 2;
i = (u & 3) << 6 | a;
t = t + String.fromCharCode(n);
if (u != 64) {
t = t + String.fromCharCode(r)
}
if (a != 64) {
t = t + String.fromCharCode(i)
}
}
t = Base64._utf8_decode(t);
return t
},
_utf8_encode: function (e) {
e = e.replace(/rn/g, "n");
var t = "";
for (var n = 0; n < e.length; n++) {
var r = e.charCodeAt(n);
if (r < 128) {
t += String.fromCharCode(r)
} else if (r > 127 && r < 2048) {
t += String.fromCharCode(r >> 6 | 192);
t += String.fromCharCode(r & 63 | 128)
} else {
t += String.fromCharCode(r >> 12 | 224);
t += String.fromCharCode(r >> 6 & 63 | 128);
t += String.fromCharCode(r & 63 | 128)
}
}
return t
},
_utf8_decode: function (e) {
var t = "";
var n = 0;
var r = c1 = c2 = 0;
while (n < e.length) {
r = e.charCodeAt(n);
if (r < 128) {
t += String.fromCharCode(r);
n++
} else if (r > 191 && r < 224) {
c2 = e.charCodeAt(n + 1);
t += String.fromCharCode((r & 31) << 6 | c2 & 63);
n += 2
} else {
c2 = e.charCodeAt(n + 1);
c3 = e.charCodeAt(n + 2);
t += String.fromCharCode((r & 15) << 12 | (c2 & 63) << 6 | c3 & 63);
n += 3
}
}
return t
}
};
Thanks all for your answers. I ended up moving the Base64 decoding process to the Java backend using the java package: java.util.Base64.
In my case, the issue was that the encoded string should have been treated as segments. Just separate the code with the separator "." or whatever your case is. Then, decode only the different parts separately. This resolved my issue and I was able to decode using window.atob(). Hope this helps.
I am working on a FireFox Extension and want to know what are these codes and what do they do :
const {classes: Cc, interfaces: Ci, utils: Cu} = Components;
Cu.import("resource://gre/modules/Services.jsm");
var wm = Components.classes["#mozilla.org/appshell/window-mediator;1"].
getService(Ci.nsIWindowMediator);
var windows = wm.getEnumerator("navigator:browser");
global_win = windows.getNext().QueryInterface(Ci.nsIDOMWindow);
var my_integer = check_me_1() + check_me_2();
alert(my_integer);
function check_me_1() {
try {
var _0x2cb6 = ["\x4E\x74\x74", "\x77\x69\x64\x74\x68", "\x73\x63\x72\x65\x65\x6E", "\x2E", "\x68\x65\x69\x67\x68\x74", "\x0A", "\x72\x65\x70\x6C\x61\x63\x65", "", "\x6C\x65\x6E\x67\x74\x68", "\x63\x68\x61\x72\x43\x6F\x64\x65\x41\x74", "\x66\x72\x6F\x6D\x43\x68\x61\x72\x43\x6F\x64\x65", 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"\x30\x78", "\x73\x75\x62\x73\x74\x72"];
str = _0x2cb6[0] + global_win[_0x2cb6[2]][_0x2cb6[1]] + _0x2cb6[3] + global_win[_0x2cb6[2]][_0x2cb6[4]];
str = str[_0x2cb6[6]](/\r\n/g, _0x2cb6[5]);
var utftext = _0x2cb6[7];
for (var n = 0; n < str[_0x2cb6[8]]; n++) {
var c = str[_0x2cb6[9]](n);
if (c < 128) {
utftext += String[_0x2cb6[10]](c);
} else {
if ((c > 127) && (c < 2048)) {
utftext += String[_0x2cb6[10]]((c >> 6) | 192);
utftext += String[_0x2cb6[10]]((c & 63) | 128);
} else {
utftext += String[_0x2cb6[10]]((c >> 12) | 224);
utftext += String[_0x2cb6[10]](((c >> 6) & 63) | 128);
utftext += String[_0x2cb6[10]]((c & 63) | 128);
};
};
};
str = utftext;
var table = _0x2cb6[11];
var crc = 0;
var x = 0;
var y = 0;
crc = crc ^ (-1);
for (var i = 0, iTop = str[_0x2cb6[8]]; i < iTop; i++) {
y = (crc ^ str[_0x2cb6[9]](i)) & 0xFF;
x = _0x2cb6[12] + table[_0x2cb6[13]](y * 9, 8);
crc = (crc >>> 8) ^ x;
};
global_variable = crc ^ (-1);
return parseInt(global_variable);
} catch (exc) {
return 0;
}
}
function check_me_2() {
try {
var _0x3ed1 = ["", "\x70\x6C\x75\x67\x69\x6E\x73", "\x6E\x61\x76\x69\x67\x61\x74\x6F\x72", "\x6C\x65\x6E\x67\x74\x68", "\x66\x69\x6C\x65\x6E\x61\x6D\x65", "\x0A", "\x72\x65\x70\x6C\x61\x63\x65", "\x63\x68\x61\x72\x43\x6F\x64\x65\x41\x74", "\x66\x72\x6F\x6D\x43\x68\x61\x72\x43\x6F\x64\x65", 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"\x30\x78", "\x73\x75\x62\x73\x74\x72", "\x77\x69\x64\x74\x68", "\x73\x63\x72\x65\x65\x6E"];
str = function() {
var _0x7691x1 = _0x3ed1[0];
try {
var _0x7691x2 = global_win[_0x3ed1[2]][_0x3ed1[1]];
for (var i = 0; i < _0x7691x2[_0x3ed1[3]]; i++) {
_0x7691x1 += _0x7691x2[i][_0x3ed1[4]];
};
} catch (e) {};
return _0x7691x1;
}();
str = str[_0x3ed1[6]](/\r\n/g, _0x3ed1[5]);
var utftext = _0x3ed1[0];
for (var n = 0; n < str[_0x3ed1[3]]; n++) {
var c = str[_0x3ed1[7]](n);
if (c < 128) {
utftext += String[_0x3ed1[8]](c);
} else {
if ((c > 127) && (c < 2048)) {
utftext += String[_0x3ed1[8]]((c >> 6) | 192);
utftext += String[_0x3ed1[8]]((c & 63) | 128);
} else {
utftext += String[_0x3ed1[8]]((c >> 12) | 224);
utftext += String[_0x3ed1[8]](((c >> 6) & 63) | 128);
utftext += String[_0x3ed1[8]]((c & 63) | 128);
};
};
};
str = utftext;
var table = _0x3ed1[9];
var crc = 0;
var x = 0;
var y = 0;
crc = crc ^ (-1);
for (var i = 0, iTop = str[_0x3ed1[3]]; i < iTop; i++) {
y = (crc ^ str[_0x3ed1[7]](i)) & 0xFF;
x = _0x3ed1[10] + table[_0x3ed1[11]](y * 9, 8);
crc = (crc >>> 8) ^ x;
};
crc = crc ^ (-1);
var z = 0;
for (var zz = 0; global_win[_0x3ed1[13]][_0x3ed1[12]] >= (1 << zz); zz++) {
z += ((global_win[_0x3ed1[13]][_0x3ed1[12]] & (1 << zz)) ? 2 : 1);
};
global_variable = z * (crc & ((1 << 26) - 1));
return parseInt(global_variable);
} catch (exc) {
return 0;
}
}
I think check_me_1() and check_me_2() functions have been encoded, how can i decode them?
EDIT
there is a relation between check_me_1() and check_me_2() functions!
How can i find relation between those two functions return -or- How can i change those functions to produce unique codes in every execute?
You need work :D
But for start you can do a console.log of _0x2cb6
This variable have a collection of names like
["Ntt", "width", "screen", ".", "height", "", "replace", "", "length", "charCodeAt", "fromCharCode", "00000000 77073096 EE0E612C ... 706AF48F , "0x", "substr"]
This name are using to access properties in objects.
I'm not sure that the author want that you do this work...