Skip to main content

A strong password generator program with source code

In my previous post https://steemit.com/programming/@royalmacro/a-free-open-source-data-encryption-program-for-steemit-users I share a data encrypton tool with source code, now, today here I share another program, a strong password generator with source code.
This program will generate strong, hard-to-guess passwords. I’ll do it by hashing together “domain name”, “login/user id” & “a secure master key”.
If you use the same secure master key for every password generations then you do not need to write down or, memorize your generated passwords. When you need your password then repeat the same procedure to re-generate it. If your “domain name”, “login/user id” & “a secure master key” are not different then you will generate the same password.
If you use only one secure master key then you have to only memorize your master key, not the passwords.
Lets try it !
Step by Step Development :
Open a new project in Visual Basic 8. Select “Standard EXE”.


Create 5 text boxes & one command button. Text1 textbox, Text2 textbox, Text3 textbox, Text4 textbox, Text5 textbox & Command1 commandbutton.
enter image description here
Add 5 Labels with captions “domain name”, “login/user id”, “secure master key”, “strong password” & “normal password”. And change the caption of the Command1 commandbutton to “Generate”. Add the passwordchar “*” to the Text3 textbox “password char” properties.
enter image description here
Add a module “Module 1” to the project
enter image description here
Add this following codes to the module “Module 1” :
enter image description here
Option Explicit

Public Function CryptRC4(sText As String, sKey As String) As String
Dim baS(0 To 255) As Byte
Dim baK(0 To 255) As Byte
Dim bytSwap     As Byte
Dim lI          As Long
Dim lJ          As Long
Dim lIdx        As Long

For lIdx = 0 To 255
    baS(lIdx) = lIdx
    baK(lIdx) = Asc(Mid$(sKey, 1 + (lIdx Mod Len(sKey)), 1))
Next
For lI = 0 To 255
    lJ = (lJ + baS(lI) + baK(lI)) Mod 256
    bytSwap = baS(lI)
    baS(lI) = baS(lJ)
    baS(lJ) = bytSwap
Next
lI = 0
lJ = 0
For lIdx = 1 To Len(sText)
    lI = (lI + 1) Mod 256
    lJ = (lJ + baS(lI)) Mod 256
    bytSwap = baS(lI)
    baS(lI) = baS(lJ)
    baS(lJ) = bytSwap
    CryptRC4 = CryptRC4 & Chr$((pvCryptXor(baS((CLng(baS(lI)) + baS(lJ)) Mod 256), Asc(Mid$(sText, lIdx, 1)))))
Next
End Function

Public Function pvCryptXor(ByVal lI As Long, ByVal lJ As Long) As Long
If lI = lJ Then
    pvCryptXor = lJ
Else
    pvCryptXor = lI Xor lJ
End If
End Function

Public Function ToHexDump(sText As String) As String
Dim lIdx            As Long

For lIdx = 1 To Len(sText)
    ToHexDump = ToHexDump & Right$("0" & Hex(Asc(Mid(sText, lIdx, 1))), 2)
Next
End Function

Public Function FromHexDump(sText As String) As String
Dim lIdx            As Long

For lIdx = 1 To Len(sText) Step 2
    FromHexDump = FromHexDump & Chr$(CLng("&H" & Mid(sText, lIdx, 2)))
Next
End Function
Input this following code to Form1 :
enter image description here
Private Sub Command1_Click()
Dim KEY As String
Dim Password As String
Dim str1, str2, str3, str4, laststr As String

If Me.Text1.Text = "" Then
MsgBox "Error - You have entered no domain!", vbCritical, "Error"
ElseIf Me.Text2.Text = "" Then
MsgBox "Error - You have entered no Login ID!", vbCritical, "Error"
ElseIf Me.Text3.Text = "" Then
MsgBox "Error - You have entered no master key!", vbCritical, "Error"
ElseIf Len(Me.Text3.Text) < 3 Then
MsgBox "Error - You have entered too short Master Key. Please, enter at least 3 characters!", vbCritical, "Error"
Else

KEY = LCase(Me.Text1.Text) + LCase(Me.Text2.Text)

Password = ToHexDump(CryptRC4(Me.Text3.Text, KEY))
If Len(Password) > 18 Then
Password = Mid$(Password, 1, 18)
End If

str1 = Mid$(Password, 1, 1)
str2 = Mid$(Password, 2, 1)
str3 = Mid$(Password, 3, 1)
str4 = Mid$(Password, 4, 1)
laststr = Mid$(Password, 5, Len(Password) - 4)

If Len(Me.Text3.Text) = 3 Then

Me.Text4.Text = str1 + "S" + str2 + "^" + str3 + "7" + str4 + "l" + laststr
Me.Text5.Text = str1 + "t" + str2 + "3" + str3 + "I" + str4 + "0" + laststr

ElseIf Len(Me.Text3.Text) = 4 Then

Me.Text4.Text = str1 + "R" + str2 + "$" + str3 + "8" + str4 + "j" + laststr
Me.Text5.Text = str1 + "k" + str2 + "7" + str3 + "X" + str4 + "5" + laststr

ElseIf Len(Me.Text3.Text) = 5 Then

Me.Text4.Text = str1 + "E" + str2 + "%" + str3 + "6" + str4 + "g" + laststr
Me.Text5.Text = str1 + "d" + str2 + "2" + str3 + "U" + str4 + "4" + laststr

ElseIf Len(Me.Text3.Text) = 6 Then

Me.Text4.Text = str1 + "H" + str2 + "!" + str3 + "5" + str4 + "m" + laststr
Me.Text5.Text = str1 + "v" + str2 + "1" + str3 + "F" + str4 + "0" + laststr

ElseIf Len(Me.Text3.Text) = 7 Then

Me.Text4.Text = str1 + "J" + str2 + "~" + str3 + "6" + str4 + "c" + laststr
Me.Text5.Text = str1 + "w" + str2 + "7" + str3 + "Q" + str4 + "9" + laststr

ElseIf Len(Me.Text3.Text) = 8 Then

Me.Text4.Text = str1 + "Z" + str2 + "#" + str3 + "8" + str4 + "h" + laststr
Me.Text5.Text = str1 + "o" + str2 + "6" + str3 + "T" + str4 + "4" + laststr

ElseIf Len(Me.Text3.Text) = 9 Then

Me.Text4.Text = str1 + "Y" + str2 + "@" + str3 + "5" + str4 + "d" + laststr
Me.Text5.Text = str1 + "p" + str2 + "4" + str3 + "W" + str4 + "7" + laststr

ElseIf Len(Me.Text3.Text) = 10 Then

Me.Text4.Text = str1 + "Z" + str2 + "&" + str3 + "8" + str4 + "n" + laststr
Me.Text5.Text = str1 + "y" + str2 + "2" + str3 + "G" + str4 + "5" + laststr

ElseIf Len(Me.Text3.Text) = 11 Then

Me.Text4.Text = str1 + "B" + str2 + "*" + str3 + "3" + str4 + "j" + laststr
Me.Text5.Text = str1 + "f" + str2 + "0" + str3 + "V" + str4 + "7" + laststr

ElseIf Len(Me.Text3.Text) = 12 Then

Me.Text4.Text = str1 + "Q" + str2 + "(" + str3 + "6" + str4 + "e" + laststr
Me.Text5.Text = str1 + "r" + str2 + "5" + str3 + "W" + str4 + "9" + laststr

ElseIf Len(Me.Text3.Text) = 13 Then

Me.Text4.Text = str1 + "U" + str2 + ")" + str3 + "7" + str4 + "t" + laststr
Me.Text5.Text = str1 + "m" + str2 + "4" + str3 + "K" + str4 + "7" + laststr

ElseIf Len(Me.Text3.Text) = 14 Then

Me.Text4.Text = str1 + "O" + str2 + "-" + str3 + "2" + str4 + "l" + laststr
Me.Text5.Text = str1 + "w" + str2 + "6" + str3 + "I" + str4 + "4" + laststr

ElseIf Len(Me.Text3.Text) = 15 Then

Me.Text4.Text = str1 + "X" + str2 + "=" + str3 + "7" + str4 + "j" + laststr
Me.Text5.Text = str1 + "d" + str2 + "5" + str3 + "V" + str4 + "6" + laststr

ElseIf Len(Me.Text3.Text) = 16 Then

Me.Text4.Text = str1 + "C" + str2 + "+" + str3 + "6" + str4 + "n" + laststr
Me.Text5.Text = str1 + "m" + str2 + "9" + str3 + "J" + str4 + "8" + laststr

ElseIf Len(Me.Text3.Text) > 16 Then

Me.Text4.Text = str1 + "T" + str2 + "+" + str3 + "6" + str4 + "y" + laststr
Me.Text5.Text = str1 + "l" + str2 + "9" + str3 + "X" + str4 + "8" + laststr


End If
End If
End Sub
Make the exe file :
enter image description here
Completed ! Now run the exe file :
enter image description here
In this tutorial I use “gmail.com” as domain, “samplegmailaccount@gmail.com” as login/user id & “12345678” as my secure master key. And after pressing the “Generate” button I got two types of passwords – strong (0Z5#388h834926252CB6) & normal (0o563T84834926252CB6). Look strong type passwords has special characters & normal has not. Some websites don’t support any special characters as password. So, you can normal password there. If you change any fields of domain, login/user id & secure master key then this program will generate quite different password.
If you use only one secure master key to generate your passwords then you have to only memorize your master key, not the passwords. And you will generate different types of strong passwords for different websites or Login/User IDs.
Thank you :D

Tags : Open Source Project, Programming, Security, Software, Steemit, Visual Basic, 

This Post Was Published On My Steemit Blog. Please, navigate to steemit and cast a free upvote to help me if you like my post. First Time heard about Steemit ? Click Here To Know Everything About Steemit 



$3 Donation [Fixed]

$Any Amount





Comments

Popular Posts (Last 7 Days)

One Black & White Photograph Daily for 30 days - Day #25

green yard - behind of my village home Camera : Xiaomi Model : 2014818 Location : Bongaon, West Bengal, India Snap Taken : 14 March 2016 Tags : Black & White Photography, Flowers & Plants photography, Landscape photography, Nature, Photography,  This Post Was Published On My Steemit Blog . Please, navigate to steemit and cast a free upvote to help me if you like my post. First Time heard about Steemit ? Click Here To Know Everything About Steemit  $3 Donation [Fixed] Donate $Any Amount

beauty beholds in the eye of the beholder #02

beauty beholds in the eye of the beholder PART #02 an unknown bird singing on my window . green yard - behind of my village home Tags : India, Nature, Photography,  This Post Was Published On My Steemit Blog . Please, navigate to steemit and cast a free upvote to help me if you like my post. First Time heard about Steemit ? Click Here To Know Everything About Steemit  $3 Donation [Fixed] Donate $Any Amount

Buds of Mangifera Indica

I took this photo last spring when I visited rural area in India. Do you recognise it ? It's buds of  Mangifera Indica .  ha ha ........  Mangifera Indica  is the scientific name of  Mango . After growing from the seed a mango tree takes around 6-8 years to bear the first fruit. In the spring all trees are showing up their new leaves with young buds. This young buds will become mango in the Summer season. mango-buds with new leaves enjoy :D Tags : Nature, Photography, Flowers & Plants photography, Landscape photography, India,  This Post Was Published On My Steemit Blog . Please, navigate to steemit and cast a free upvote to help me if you like my post. First Time heard about Steemit ? Click Here To Know Everything About Steemit  $3 Donation [Fixed] Donate $Any Amount

Blossom

White Lightning petals .... Camera : samsung Model : SM-A310N0 Location : West Bengal, India Snap Taken : 14 March 2018 Tags : Photography, Nature, Flowers, Flowers & Plants photography, Macro Photography,  This Post Was Published On My Steemit Blog . Please, navigate to steemit and cast a free upvote to help me if you like my post. First Time heard about Steemit ? Click Here To Know Everything About Steemit  $3 Donation [Fixed] Donate $Any Amount

From my Kolkata Book Fair Photo Album - Series #07

A photography exhibition held in the Book fair Camera : SONY Model : DSC-W710 Location : Kolkata Book Fair, Kolkata City, West Bengal, India Snap Taken : 04 Feb 2018 To Be Continued.. Previous Episodes :  Episode #01 ,  Episode #02 ,  Episode #03 ,  Episode #04 ,  Episode #05 ,  Episode #06 Tags : Festival, India, Photography, Travel,  This Post Was Published On My Steemit Blog . Please, navigate to steemit and cast a free upvote to help me if you like my post. First Time heard about Steemit ? Click Here To Know Everything About Steemit  $3 Donation [Fixed] Donate $Any Amount

Eggplant Plant - So Green

I captured this photo in my village home vegetable garden. It' a sweet little eggplant plant, so green, so cute... Tags : Photography, Flowers & Plants photography, Nature,  This Post Was Published On My Steemit Blog . Please, navigate to steemit and cast a free upvote to help me if you like my post. First Time heard about Steemit ? Click Here To Know Everything About Steemit  $3 Donation [Fixed] Donate $Any Amount

The Real Face Of India - Episode 133

The Real Face Of India - Episode#133 I believe that India is the most beautiful country in the world. In this series I show the real face of beautiful India. Half Dozen Photos of Natural Beauties Snap taken : 21 Mar 2018   Camera : SAMSUNG, Model : SM-A310N0 Other Episodes :  Episode#01 ,  Episode#02 ,  Episode#03 ,  Episode#04 ,  Episode#05 ,  Episode#06 ,  Episode#07 ,  Episode#08 ,  Episode#09 ,  Episode#10 ,  Episode#11 ,  Episode#12 ,  Episode#13 ,  Episode#14 ,  Episode#15 ,  Episode#16 ,  Episode#17 ,  Episode#18 ,  Episode#19 ,  Episode#20 ,  Episode#21 ,  Episode#22 ,  Episode#23 ,  Episode#24 ,  Episode#25 ,  Episode#26 ,  Episode#27 ,  Episode#28 ,  Episode#29 ,  Episode#30 ,  Episode#31 ,  Episode#32 ,  Episode#33 ,  Episode#34 ,  Episode#35 ,  Episode#36 ,  Episode#37 ,  Episode#38 ,  Episode#39 ,  Episode#40 ,  Episode#41 ,  Episode#42 ,  Episode#43 ,  Episode#44 ,  Episode#45 ,  Episode#46 ,  Episode#47 ,  Episode#48 ,  Episode#49 ,  Episode#50 , 

What I Learnt Today : 10 Unknown Amazing Facts About Animals - Part IX

image credit (1) There is an average of 50,000 spiders per acre in green areas.  (2) Male dogs will raise their legs while urinating to aim higher on a tree or lamppost because they want to leave a message that they are tall and intimidating. Some wild dogs in Africa try to run up tree trunks while they are urinating to appear to be very large.  (3) Dumbledore isn’t only the Headmaster of Hogwarts; in fact a dumbledore is an old English term for a type of bee.  (4) Goats and octopus’ pupils of their eyes are rectangular. image credit (5) Frogs cannot swallow without blinking.  (6) Ailurophobia is the fear of cats.  (7) Butterflies have their skeletons on the outside of their bodies, this is known as the exoskeleton. image credit (8) Hippos attract mates by urinating and defecating.  (9) Crocodiles have brains no larger than a cigar.  (10) The Big Five is a group of animals of Africa: cape buffalo, elephant, leopard, lion and rhino.   image credit Previous Episodes

Deadliest Ancient Indian Weapons

Today here I introduce some ancient destructive weapons which were used in India during 100 to 700 A.D.   My visit : Collections of ancient Indian weapons, Chennai Museum     10. Bhuj, Or Kirpan (Dagger)   image credit     image credit     image credit This kind of dagger were mostly used in India during duels. These daggers are small in shape & size, 6-10 inches long and 2-4 inches wide. Weight is up to 500 grams. This dagger is made of steel, jade, gold, diamond, emerald, ruby, agate etc. These daggers were not popular in the wars, only popular for hand-to-hand fighting.  09. Valla Or, Shul (Spear)   image credit     image credit     image credit Valla were very popular in the wars, because, attackers could use it in keeping themselves from safe distances. It has a long sharp steel bladed head. Length is up to 40 inches & weight is up to 5 kilograms.  08. Trishul (Triple bladed spear)   image credit     image credit    

Dragon Pattern [An Original Design]

I design this virtual carpet - Dragon Pattern Dragon Pattern Tags : Abstract, Art, Design, Drawing, Painting,  This Post Was Published On My Steemit Blog . Please, navigate to steemit and cast a free upvote to help me if you like my post. First Time heard about Steemit ? Click Here To Know Everything About Steemit  $3 Donation [Fixed] Donate $Any Amount
Back to Top