An open source strong password generator program for steemians [repost]

in #programming • 7 years ago

In my previous post https://steemit.com/programming/@royalmacro/57axja-a-free-open-source-data-encryption-program-for-steemit-users-repost 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.


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.
 



 Add a module “Module 1” to the project
 



 Add this following codes to the module “Module 1” :
 




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 :
 



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


 Compile & Make the executable file :
 


 Completed ! Now run the exe file :



In this tutorial I use “gmail.com” as domain, “[email protected]” 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 

Download the source code project
 

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7 years ago in #programming by
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     7 years ago 

    Congrats you have been selected by the Steemvoter (SV) Guild, keep up the good work and helping make Steem great!

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     7 years ago 

    Thanks for the very helpful post and the links to source code!

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       7 years ago 

      Excellent post dear friend @royalmacro, these are great work, congratulations and many thanks for sharing this wonderful post
      have a good weekend

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         7 years ago 

        This post has been ranked within the top 50 most undervalued posts in the second half of Jun 16. We estimate that this post is undervalued by $27.15 as compared to a scenario in which every voter had an equal say.

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