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TheGreatMilenko
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 Posted: Thu Oct 30, 2008 10:28 pm Post subject: [Solved] Help With MD5 Key Encryption. |
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I need some help with MD5 encryption, I totally don't understand it, And i want to make my programs more secure, By adding some MD5 into the login phase, But if theres something better then I'm willing to learn.
I don't know whether to use encryption decryption or hash...o.0
So if anyone out there wants to help, Please Do. 
The code i used to use, Noobish...
| Code: | Private Sub CmdLogIn_Click()
Dim passpart1, passpart2, passpart3 As String
passpart1 = "test"
passpart2= "test"
passpart3 = "test"
If TxtKey.Text = vbNullString Then
MsgBox "You left the Key field blank!", vbCritical, "Error"
Exit Sub
End If
CmdLogIn.Enabled = False
TxtKey.Enabled = False
If TxtKey.Text = passpart1 + passpart2 + passpart3 Then
Form2.Visible = True
Unload Me
MsgBox ("Welcome CEF User!"), vbInformation, "Success!"
Exit Sub
Else
MsgBox ("Incorrect Key!"), vbCritical, "Error"
CmdLogIn.Enabled = True
TxtKey.Enabled = True
End If
End Sub
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New more securer code, For those who might stumble upon the same question i had...
| Code: |
'Put this in the Form for Authorization/Login.
Option Explicit
Dim md5Test As MD5
Private Sub CmdLogIn_Click()
If TxtKey.Text = vbNullString Then
MsgBox "You left the Key field blank!", vbCritical, "Error"
Exit Sub
End If
CmdLogIn.Enabled = False
TxtKey.Enabled = False
If LCase(md5Test.DigestStrToHexStr(TxtKey.text)) = "24407d308f312e21b4af74389c4dd011" Then
'Where "24407d308f312e21b4af74389c4dd011" Is the hash of "CEF!"
Form2.Visible = True
Unload Me
MsgBox ("Welcome CEF User!"), vbInformation, "Success!"
Exit Sub
Else
MsgBox ("Incorrect Key!"), vbCritical, "Error"
CmdLogIn.Enabled = True
TxtKey.Enabled = True
End If
End Sub
Private Sub Form_Load()
' Instantiate our class
Set md5Test = New MD5
End Sub
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Also add the MD5 class module provided with the link Moller gave... Link It should pretty much explain itself, Good luck.
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Last edited by TheGreatMilenko on Sun Nov 02, 2008 10:12 pm; edited 1 time in total |
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oib111
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| Posted: Fri Oct 31, 2008 3:22 am Post subject: |
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What do you mean you totally don't understand it? Like you don't understand how it works, or you don't understand how to implement it?
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cigs dont make people high, which weed does, which causes them to do bad stuff. like killing |
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TheGreatMilenko
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| Posted: Fri Oct 31, 2008 6:06 pm Post subject: |
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| oib111 wrote: | | What do you mean you totally don't understand it? Like you don't understand how it works, or you don't understand how to implement it? |
EXACTLY!!!! lol
I don't know neither of those things, But i want to.
I just want to learn how these things work, I think its a button code that calls the code set in a module, But yea, Can you explain it more a bit?
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oib111
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TheGreatMilenko
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Snootae
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| Posted: Fri Oct 31, 2008 8:34 pm Post subject: |
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the pseudocode is essentially exactly what you have to fucking do
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oib111
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| Posted: Fri Oct 31, 2008 11:06 pm Post subject: |
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Also, MD5 is vulnerable to attack, so I suggest using something a bit more secure.
_________________
| 8D wrote: |
cigs dont make people high, which weed does, which causes them to do bad stuff. like killing |
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TheGreatMilenko
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| Posted: Sat Nov 01, 2008 1:13 am Post subject: |
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| Snootae wrote: | | the pseudocode is essentially exactly what you have to fucking do |
Well wtf is pseudocode? o.O
| oib111 wrote: | | Also, MD5 is vulnerable to attack, so I suggest using something a bit more secure. |
Well whats your opinion of better?
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oib111
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| Posted: Sat Nov 01, 2008 7:57 pm Post subject: |
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http://en.wikipedia.org/wiki/Pseudocode
| Quote: |
Pseudocode is a compact and informal high-level description of a computer programming algorithm that uses the structural conventions of some programming language, but is intended for human reading rather than machine reading. Pseudo-code typically omits details that are not essential for human understanding of the algorithm, such as variable declarations, system-specific code and subroutines. The programming language is augmented with natural language descriptions of the details, where convenient, or with compact mathematical notation. The purpose of using pseudocode is that it is easier for humans to understand than conventional programming language code, and that it is close enough to real code to be a compact and environment-independent description of the key principles of an algorithm. It is commonly used in textbooks and scientific publications that are documenting various algorithms, and also in planning of computer program development, for sketching out the structure of the program before the actual coding takes place.
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http://en.wikipedia.org/wiki/SHA_hash_functions#SHA-2_family
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| 8D wrote: |
cigs dont make people high, which weed does, which causes them to do bad stuff. like killing |
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NothingToShow
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| Posted: Sun Nov 02, 2008 3:39 am Post subject: |
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http://www.bullzip.com/md5/vb/md5-visual-basic.htm
| Code: | Option Explicit
'/******************************************************************************
' * Copyright (C) 2000 by Robert Hubley. *
' * All rights reserved. *
' * *
' * This software is provided ``AS IS'' and any express or implied *
' * warranties, including, but not limited to, the implied warranties of *
' * merchantability and fitness for a particular purpose, are disclaimed. *
' * In no event shall the authors be liable for any direct, indirect, *
' * incidental, special, exemplary, or consequential damages (including, but *
' * not limited to, procurement of substitute goods or services; loss of use, *
' * data, or profits; or business interruption) however caused and on any *
' * theory of liability, whether in contract, strict liability, or tort *
' * (including negligence or otherwise) arising in any way out of the use of *
' * this software, even if advised of the possibility of such damage. *
' * *
' ******************************************************************************
'
' Form: TestSuite
'
' DESCRIPTION:
' A short demonstration form which calls the MD5.DLL library using a
' standard test suite of values. The results are displayed next to the
' expected return set for comparison.
'
' AUTHOR:
' Robert M. Hubley 12/1999
'
'
' NOTES:
'
'
' CHANGE HISTORY:
'
' 1.0.0 RMH 2000/1/5 Original version
'
'
'= Global Variables
Dim md5Test As MD5
Private Sub btnRunTest_Click()
lblResults(0).Caption = LCase(md5Test.DigestStrToHexStr(""))
lblResults(1).Caption = LCase(md5Test.DigestStrToHexStr("a"))
lblResults(2).Caption = LCase(md5Test.DigestStrToHexStr("abc"))
lblResults(3).Caption = LCase(md5Test.DigestStrToHexStr("message digest"))
lblResults(4).Caption = LCase(md5Test.DigestStrToHexStr("abcdefghijklmnopqrstuvwxyz"))
lblResults(5).Caption = LCase(md5Test.DigestStrToHexStr("ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789"))
lblResults(6).Caption = LCase(md5Test.DigestStrToHexStr("12345678901234567890123456789012345678901234567890123456789012345678901234567890"))
End Sub
Private Sub Form_Load()
' Instantiate our class
Set md5Test = New MD5
End Sub |
I don't know if that's what you requested, I just searched.
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dnsi0
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| Posted: Sun Nov 02, 2008 9:38 am Post subject: |
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| Find the address of your functions then md5 hash the memory then check it as you click the login btn.
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TheGreatMilenko
Grandmaster Cheater
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Joined: 15 Nov 2007
Posts: 557
Location: Doin Tha Dayum Thang. o;
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| Posted: Sun Nov 02, 2008 6:02 pm Post subject: |
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| oib111 wrote: | http://en.wikipedia.org/wiki/Pseudocode
| Quote: |
Pseudocode is a compact and informal high-level description of a computer programming algorithm that uses the structural conventions of some programming language, but is intended for human reading rather than machine reading. Pseudo-code typically omits details that are not essential for human understanding of the algorithm, such as variable declarations, system-specific code and subroutines. The programming language is augmented with natural language descriptions of the details, where convenient, or with compact mathematical notation. The purpose of using pseudocode is that it is easier for humans to understand than conventional programming language code, and that it is close enough to real code to be a compact and environment-independent description of the key principles of an algorithm. It is commonly used in textbooks and scientific publications that are documenting various algorithms, and also in planning of computer program development, for sketching out the structure of the program before the actual coding takes place.
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http://en.wikipedia.org/wiki/SHA_hash_functions#SHA-2_family |
lol Holleh shet, These kinda things don't come easy i guess, Well i guess the headaches will be worth it.
| Moller wrote: | http://www.bullzip.com/md5/vb/md5-visual-basic.htm
| Code: | Option Explicit
'/******************************************************************************
' * Copyright (C) 2000 by Robert Hubley. *
' * All rights reserved. *
' * *
' * This software is provided ``AS IS'' and any express or implied *
' * warranties, including, but not limited to, the implied warranties of *
' * merchantability and fitness for a particular purpose, are disclaimed. *
' * In no event shall the authors be liable for any direct, indirect, *
' * incidental, special, exemplary, or consequential damages (including, but *
' * not limited to, procurement of substitute goods or services; loss of use, *
' * data, or profits; or business interruption) however caused and on any *
' * theory of liability, whether in contract, strict liability, or tort *
' * (including negligence or otherwise) arising in any way out of the use of *
' * this software, even if advised of the possibility of such damage. *
' * *
' ******************************************************************************
'
' Form: TestSuite
'
' DESCRIPTION:
' A short demonstration form which calls the MD5.DLL library using a
' standard test suite of values. The results are displayed next to the
' expected return set for comparison.
'
' AUTHOR:
' Robert M. Hubley 12/1999
'
'
' NOTES:
'
'
' CHANGE HISTORY:
'
' 1.0.0 RMH 2000/1/5 Original version
'
'
'= Global Variables
Dim md5Test As MD5
Private Sub btnRunTest_Click()
lblResults(0).Caption = LCase(md5Test.DigestStrToHexStr(""))
lblResults(1).Caption = LCase(md5Test.DigestStrToHexStr("a"))
lblResults(2).Caption = LCase(md5Test.DigestStrToHexStr("abc"))
lblResults(3).Caption = LCase(md5Test.DigestStrToHexStr("message digest"))
lblResults(4).Caption = LCase(md5Test.DigestStrToHexStr("abcdefghijklmnopqrstuvwxyz"))
lblResults(5).Caption = LCase(md5Test.DigestStrToHexStr("ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789"))
lblResults(6).Caption = LCase(md5Test.DigestStrToHexStr("12345678901234567890123456789012345678901234567890123456789012345678901234567890"))
End Sub
Private Sub Form_Load()
' Instantiate our class
Set md5Test = New MD5
End Sub |
I don't know if that's what you requested, I just searched. |
Thanks Moller, I think this is somewhat the coding i need.
Edit:Actually Moller this worked great, I used it with my button code and it created a hash which i used for the authorization, I'm beginning to understand it.
| dnsi0 wrote: | | Find the address of your functions then md5 hash the memory then check it as you click the login btn. |
Huh? But then what if other people use it, Wouldn't the address change after each use?
Edit 2: Another quick question, Is MD5 Hash easily Reversible?
Like Ex:
I used this for a hash test-
InputMD5: "MilenkoHax" Created "a8bce04a64ffa25c192a2f18153f50cd"
Can people use this hash "a8bce04a64ffa25c192a2f18153f50cd" and reverse it back to "MilenkoHax"?
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oib111
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| Posted: Sun Nov 02, 2008 9:40 pm Post subject: |
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A hash is irreversible. You can't just go backwards through the steps and it will be back to normal (I'm not sure how it works so don't ask). That's what's so good about hashes, since they're irreversible people can't reverse things such as windows passwords. They can only use brute force, dictionary, or rainbow attack.
_________________
| 8D wrote: |
cigs dont make people high, which weed does, which causes them to do bad stuff. like killing |
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TheGreatMilenko
Grandmaster Cheater
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oib111
I post too much
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| Posted: Sun Nov 02, 2008 10:51 pm Post subject: |
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Your welcome that's why we're here 
_________________
| 8D wrote: |
cigs dont make people high, which weed does, which causes them to do bad stuff. like killing |
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