Perancangan Add On Keamanan Email Mozilla Thunderbird dengan Algoritma Kriptografixor dan Three Pass Protocol Serta Kompresi Lempelziv Welch

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LAMPIRAN A : LISTING PROGRAM

File : chrome.manifest

content addonta chrome/

style chrome://global/content/customizeToolbar.xul chrome://addonta/content/button.css

# Thunderbird compose Overlay chrome:

//messenger/content/messengercompose/messengercompose.xul chrome://addonta/content/button.xul

File : install.rdf

<?xml version="1.0"?>

<RDF xmlns="http://www.w3.org/1999/02/22-rdf-syntax-ns#" xmlns:em="http://www.mozilla.org/2004/em-rdf#"> <Description

about="urn:mozilla:install-manifest"

em:name="Proyek Tugas Akhir S-1 Ilmu Komputer USU"

em:description="Add On Keamanan EMail dengan Kriptografi XOR Menggunakan Threee Pass Protocol dan Kompresi Lempel Ziv Welch (LZW)"

em:creator="Brikson Hara Donald Barus - 081401037" em:id="addonenkripsikompresi@ilmukomputer.usu.ac.id" em:version="1.0"

em:iconURL="chrome://addonta/content/icon.png" > <em:targetApplication>

<Description

em:id="{3550f703-e582-4d05-9a08-453d09bdfdc6}" em:minVersion="1.4"

em:maxVersion="11.*" /> </em:targetApplication> <em:file>

<Description

about="urn:mozilla:extension:addonta" em:package="content/addonta/" /> </em:file>

</RDF>

File : button.css

#button-enkripsi, #wrapper-button-enkripsi {list-style-image:

url("chrome://addonta/content/buttonenkripsi.png");} .addonta

{-moz-image-region: rect( 0px 24px 24px 0px);} .addonta:hover

{-moz-image-region: rect(24px 24px 48px 0px);}

[iconsize="small"] .addonta

{-moz-image-region: rect( 0px 40px 16px 24px);} [iconsize="small"] .addonta:hover

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{list-style-image:

url("chrome://addonta/content/buttondekripsi.png");}

.addonta

{-moz-image-region: rect( 0px 24px 24px 0px);} .addonta:hover

[iconsize="small"] .addonta

{-moz-image-region: rect( 0px 40px 16px 24px);} [iconsize="small"] .addonta:hover

button.xul

/*Referensi utama perancangan dokumen XUL overlay diperoleh pada https://developer.mozilla.org/ */

<?xml version="1.0" encoding="UTF-8"?> <?xml-stylesheet type="text/css"

href="chrome://addonta/content/button.css"?> <!DOCTYPE overlay >

<overlay id="addonta-overlay"

xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul" >

src="chrome://addonta/content/scriptForAddOn.js"/>

<toolbarbutton id="button-enkripsi" label="Enkripsi"

tooltiptext="Digunakan untuk melakukan Enkripsi dan Proses Kompresi-Dekompresi yang diperlukan" oncommand="cryptography.encryptionTPPControlProcess()"

class="toolbarbutton-1 chromeclass-toolbar-additional addonta" />

<toolbarbutton id="button-dekripsi" label="Dekripsi"

tooltiptext="Digunakan untuk melakukan Dekripsi dan Proses Kompresi-Dekompresi yang diperlukan" oncommand="cryptography.decryptionTPPControlProcess()"

class="toolbarbutton-1 chromeclass-toolbar-additional addonta" />

</overlay>

File : scriptForAddOn.js

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plainText:'', key:'',

cipherText:'', inputText:'',

getBodyText: function(){

var composer = document.getElementById('msgcomposeWindow'); var source = composer.getElementsByAttribute('id', 'content-frame').item(0).contentDocument.documentElement;

this.inputText = source.textContent; },

lcgKeyGenerator: function(lengthOfKey){ var time= new Date;

var a=time.getMinutes(); var b=time.getSeconds(); var x=0, x1=0;

this.key=''; do{

x1=((a*x)+b)%64; x=x1;

this.key+=encoDecoding.getBiner(x); } while((lengthOfKey-this.key.length)>=6)

if(((lengthOfKey-this.key.length)<6)&&((lengthOfKey-this.key.length)>0)){

x1=((a*x)+b)%64; x=x1;

var temp=encoDecoding.getBiner(x);

this.key+=temp.slice(6-(lengthOfKey-this.key.length)); }

},

writeOnCompose: function(textToWritten){ var editor = GetCurrentEditor();

var editor_type = GetCurrentEditorType(); editor.beginTransaction();

editor.beginningOfDocument(); // seek to beginning editor.selectAll();

editor.cut();

editor.selectAll(); editor.cut();

editor.insertText(textToWritten); editor.endTransaction();

},

encryptionTPPControlProcess: function(){ this.getBodyText();

if(this.inputText.length!=0){

var flag=this.inputText.slice(0,3); if(flag=='[1]'){

this.plainText=this.inputText.slice(3);

var start= new Date().getTime();

var binPlain=encoDecoding.base64Decode(this.plainText); var timeP= new Date().getTime()-start;

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start= new Date().getTime();

var binCipher=this.encrypt(binPlain); timeP= new Date().getTime()-start;

alert('Waktu Enkripsi Tahap-2 = '+timeP+' milisecond');

if(binCipher!=''){

this.cipherText=encoDecoding.base64Encode(binCipher); timeP= new Date().getTime()-start;

alert('Waktu Encoding Tahap-2 = '+timeP+' milisecond');

this.writeOnCompose('[2]'+this.cipherText); var dir = ioFileAccessing.getDirectory('ProfD'); var fin='\\extensions\\Key_Enkripsi_2.txt'; var path=dir.path + fin;

var fileIn = ioFileAccessing.open(path); ioFileAccessing.write(fileIn,this.key);

alert('Terima Kasih.. \nProses Enkripsi Berhasil (Silahkan Lanjutkan Proses Selanjutnya)');

}

} else if(flag=='[2]'){

alert('Maaf Proses Three Pass Protocol (Tahap Ke-3) yang seharusnya anda lakukan adalah Dekripsi');

alert('Maaf Proses Three Pass Protocol (Tahap Ke-4) yang seharusnya anda lakukan adalah Dekripsi');

} else {

this.plainText=this.inputText;

alert('Panjang Plainteks = ' +this.plainText.length); alert('Panjang Bit Plainteks =

'+this.plainText.length*8);

var start=new Date().getTime();

var compressed=lzwCompression.compress(this.plainText); var timeP= new Date().getTime()-start;

alert('Waktu Kompresi = '+timeP+' milisecond');

var dicBitLength=lzwCompression.getDictionaryBitLength(); var

binCompressed=lzwCompression.binarizeCompressed(compressed); alert('Panjang Bit Kamus = '+dicBitLength); alert('Panjang Bit Hasil Kompresi =

'+binCompressed.length);

var binCipher=this.encrypt(binCompressed); var timeP= new Date().getTime()-start;

alert('Waktu Enkripsi Tahap-1 = '+timeP+' milisecond');

if(binCipher!=''){

this.cipherText=encoDecoding.base64Encode(binCipher); timeP= new Date().getTime()-start;

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this.writeOnCompose('[1]'+this.cipherText);

var dir = ioFileAccessing.getDirectory('ProfD');

var fin='\\extensions\\Key_Enkripsi_1.txt'; var path=dir.path + fin;

var fileIn = ioFileAccessing.open(path); ioFileAccessing.write(fileIn,this.key);

fin='\\extensions\\Panjang Bit Kamus.txt'; path=dir.path + fin;

fileIn = ioFileAccessing.open(path);

ioFileAccessing.write(fileIn,String(dicBitLength));

alert('Terima Kasih.. \nProses Enkripsi Berhasil (Silahkan Lanjutkan Proses Selanjutnya)');

} }

} else {

alert('Maaf, Anda belum memasukkan pesan!'); }

},

decryptionTPPControlProcess: function(){ this.getBodyText();

if(this.inputText.length!=0){

var flag=this.inputText.slice(0,3); if(flag=='[1]'){

alert('Maaf Proses Three Pass Protocol (Tahap Ke-2) yang seharusnya anda lakukan adalah Enkripsi');

this.cipherText=this.inputText.slice(3);

var dir = ioFileAccessing.getDirectory('ProfD'); var fin='\\extensions\\Key_Enkripsi_1.txt'; var path=dir.path + fin;

var fileIn = ioFileAccessing.open(path); this.key = ioFileAccessing.read(fileIn);

dir = ioFileAccessing.getDirectory('ProfD'); fin='\\extensions\\Panjang Bit Kamus.txt'; path=dir.path + fin;

fileIn = ioFileAccessing.open(path);

var dicBitLenth = eval(ioFileAccessing.read(fileIn));

var binCipher=encoDecoding.base64Decode(this.cipherText); var timeP= new Date().getTime()-start;

alert('Waktu Decoding Tahap-3 = '+timeP+' milisecond');

var binPlain=this.decrypt(binCipher); timeP= new Date().getTime()-start;

alert('Waktu Dekripsi Tahap-3 = '+timeP+' milisecond');

if(binPlain!=''){

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timeP= new Date().getTime()-start;

alert('Waktu Encoding Tahap-3 = '+timeP+' milisecond');

this.writeOnCompose('[3]'+String(dicBitLenth)+'&'+this.plainText); alert('Terima Kasih.. \nProses Dekripsi Berhasil

(Silahkan Lanjutkan Proses Selanjutnya)'); }

var procCipherText=this.inputText.slice(3);

var signLoc=0;

for(var i=0;i<=procCipherText.length-1;i++){ if(procCipherText.charAt(i)=='&'){

signLoc=i;

i=procCipherText.length; }

}

var dicBinLength=eval(procCipherText.slice(0,signLoc)); this.cipherText=procCipherText.slice(signLoc+1);

var dir = ioFileAccessing.getDirectory('ProfD'); var fin='\\extensions\\Key_Enkripsi_2.txt'; var path=dir.path + fin;

var fileIn = ioFileAccessing.open(path); this.key = ioFileAccessing.read(fileIn);

var binCipher=encoDecoding.base64Decode(this.cipherText); var timeP= new Date().getTime()-start;

alert('Waktu DeCoding Tahap Akhir = '+timeP+' milisecond');

var binPlain=this.decrypt(binCipher); timeP= new Date().getTime()-start;

alert('Waktu Dekripsi Tahap Akhir = '+timeP+' milisecond');

if(binPlain!=''){

lzwCompression.setDictionaryBitLength(dicBinLength); var

compressedPlain=lzwCompression.decCompressed(binPlain);

this.plainText=lzwCompression.decompress(compressedPlain); timeP= new Date().getTime()-start;

alert('Waktu Dekompresi Tahap Akhir = '+timeP+' milisecond');

this.writeOnCompose(this.plainText);

alert('Terima Kasih.. \nProses Dekripsi Berhasil, Proses Terakhir Telah Berhasil Dilakukan.');

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alert('Maaf Proses Three Pass Protocol (Tahap Pertama) yang seharusnya anda lakukan adalah Enkripsi'); }

} else {

alert('Maaf, Anda belum memasukkan pesan!'); }

},

xorOperation: function(opr1,opr2){ var result = '';

if(opr1.length==opr2.length){

for(var i=0;i<=opr1.length-1;i++){

var temp=eval(opr1.charAt(i))^eval(opr2.charAt(i)); result+=temp;

} } else {

alert('Mohon Maaf Operasi XOR Tidak Dapat Dilakukan terdapat Kesalahan.'+'\nMohon Ulangi Proses Three Pass Protocol');

}

return result; },

encrypt: function(binPlain){

this.lcgKeyGenerator(binPlain.length);

var binCipher=this.xorOperation(binPlain,this.key); return binCipher;

},

decrypt: function(binCipher){

var binPlain=this.xorOperation(binCipher,this.key); return binPlain;

} },

lzwCompression={

dictionary:new Array(), dictionaryBitLength:0,

setDictionary: function(){ this.dictionary=[]; for(var i=0;i<=255;i++){

this.dictionary[i]=String.fromCharCode(i); }

this.dictionaryBitLength=(this.dictionary.length-1).toString(2).length;

},

getIndexfromDictionary:function(lookChars){

var dictionaryIndex=this.dictionary.indexOf(lookChars); return dictionaryIndex;

},

getDictionaryBitLength:function(){ return this.dictionaryBitLength; },

setDictionaryBitLength:function(dicBitLength){ this.dictionaryBitLength=dicBitLength; },

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var stream='';

if(indexOfDictionary<=this.dictionary.length-1){ stream=this.dictionary[indexOfDictionary]; }

return stream; },

addToDictionary: function(addedStream){ var lastIndex=this.dictionary.length; lastIndex++;

this.dictionary[lastIndex]=addedStream;

this.dictionaryBitLength=(lastIndex-1).toString(2).length;

},

compress: function(inputStream){ this.setDictionary();

var compressed=new Array(); var resultCount=0;

var lookAhead='';

for(var i=0;i<=inputStream.length-1;i++){ var nextChar=inputStream.charAt(i); var lookAheadNext=lookAhead+nextChar;

var indDictionary=this.getIndexfromDictionary(lookAheadNext); if(indDictionary != -1){

lookAhead=lookAheadNext; } else {

compressed[resultCount]=this.getIndexfromDictionary(lookAhead); resultCount++;

this.addToDictionary(lookAheadNext); lookAhead=nextChar;

}

if(i==inputStream.length-1){

compressed[resultCount]=this.getIndexfromDictionary(lookAhead); }

}

return compressed; },

decompress:function(inputStream){ this.setDictionary();

var uncompressed=''; var resultCount=0; var prev='';

var prev=this.getStreamfromDictionary(inputStream[0]); uncompressed+=prev;

resultCount++; var entry;

for(var i=1;i<=inputStream.length-1;i++){

var temp=this.getStreamfromDictionary(inputStream[i]); if(temp!=''){

entry=temp; } else {

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uncompressed+=entry; resultCount++;

this.addToDictionary(prev+entry.charAt(0)); prev=entry;

}

return uncompressed; },

binarizeCompressed: function(inputDecimals){ var binCompressedResult='';

for(var i=0;i<=inputDecimals.length-1;i++){ var temp=inputDecimals[i].toString(2);

var lengthOfPadding=this.dictionaryBitLength-temp.length; var padding='';

for(var j=0;j<=lengthOfPadding-1;j++){ padding+='0';

}

temp=padding+temp;

binCompressedResult+=temp; }

return binCompressedResult; },

decCompressed: function(inputBin){ var counter=0;

var decimalOfBit=new Array(); var index=0;

do{ var

temp=inputBin.substring(counter,(counter+this.dictionaryBitLength)); var dec=0;

for(var i=0;i<=this.dictionaryBitLength-1;i++){ var bitval=eval(temp.charAt(i));

var valOfBit=Math.pow(2,(this.dictionaryBitLength-(i+1)));

dec+=(bitval*valOfBit); }

decimalOfBit[index]=dec; index++;

counter+=this.dictionaryBitLength; } while((inputBin.length-counter)>=9)

return decimalOfBit; }

},

encoDecoding={

base64CharSet:'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz01 23456789+/',

paddingSign: new Array("!","@","#","$","%"), base64Encoded:'',

getDecimal: function(binStream){ var dec=0;

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dec+=eval(binStream.charAt(3))*4; dec+=eval(binStream.charAt(4))*2; dec+=eval(binStream.charAt(5))*1; return dec;

},

getBiner: function(dec){ var temp=dec.toString(2); var padding=6-temp.length; var bin='';

switch(padding){

case 1: bin='0'+temp; break; case 2: bin='00'+temp; break; case 3: bin='000'+temp; break; case 4: bin='0000'+temp; break; case 5: bin='00000'+temp; break; default : bin=temp;

}

return bin; },

base64Encode: function(unencodedBits){ var counter=0;

var temp=''; var index=0;

this.base64Encoded=''; do{

temp=unencodedBits.substring(counter,counter+6); counter+=6;

index=this.getDecimal(temp);

this.base64Encoded+=this.base64CharSet.charAt(index);

}while((unencodedBits.length-counter)>=6)

if((unencodedBits.length-counter)==1){

temp='00000'+unencodedBits.slice(counter); index=this.getDecimal(temp);

this.base64Encoded+=this.base64CharSet.charAt(index)+this.paddingS ign[0];

}

if((unencodedBits.length-counter)==2){

}

if((unencodedBits.length-counter)==3){ temp='000'+unencodedBits.slice(counter); index=this.getDecimal(temp);

}

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}

if((unencodedBits.length-counter)==5){ temp='0'+unencodedBits.slice(counter); index=this.getDecimal(temp);

}

return this.base64Encoded; },

base64Decode: function(encoded){ var unencodedBits='';

var sign=0;

var len=encoded.length;

var lastChar=encoded.charAt(len-1);

for(var i=0;i<=4;i++){

if(lastChar==this.paddingSign[i]){ sign=6-(i+1);

} }

if(sign==0){

for(var i=0;i<=len-1;i++){

for(var j=0;j<=this.base64CharSet.length-1;j++){

if(encoded.charAt(i)==this.base64CharSet.charAt(j)){ unencodedBits+=this.getBiner(j); j=this.base64CharSet.length; }

} }

} else {

for(var i=0;i<=len-3;i++){

if(encoded.charAt(i)==this.base64CharSet.charAt(j)){ unencodedBits+=this.getBiner(j); j=this.base64CharSet.length; }

} }

var temp=encoded.charAt(len-2);

if(temp==this.base64CharSet.charAt(j)){ var binLast=this.getBiner(j);

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} }

}

return unencodedBits; }

},

ioFileAccessing={

open : function(path) { try {

var file =

Components.classes['@mozilla.org/file/local;1'].createInstance(Compon ents.interfaces.nsILocalFile);

file.initWithPath(path); return file;

}

catch(e) {

return false; }

},

read: function(file, charset) { try {

var data = new String();

var fiStream = Components.classes['@mozilla.org/network/file-

input-stream;1'].createInstance(Components.interfaces.nsIFileInputStream); var siStream =

Components.classes['@mozilla.org/scriptableinputstream;1'].createInst ance(Components.interfaces.nsIScriptableInputStream);

fiStream.init(file, 1, 0, false); siStream.init(fiStream);

data += siStream.read(-1); siStream.close();

fiStream.close(); return data;

}

catch(e) {

return false; }

},

write: function(file, data) { try {

var foStream = Components.classes['@mozilla.org/network/file-

output-stream;1'].createInstance(Components.interfaces.nsIFileOutputStream); var flags = 0x02| 0x08 | 0x20; // wronly | create | truncate foStream.init(file, flags, 0664, 0);

foStream.write(data, data.length); foStream.close();

return true; }

catch(e) {

return false; }

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getDirectory: function(type) { try {

var dir =

Components.classes['@mozilla.org/file/directory_service;1'] .createInstance(Components.interfaces.nsIProperties) .get(type, Components.interfaces.nsIFile);

return dir; }

catch(e) {

return false; }