📄 frmencfiles.frm
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VERSION 5.00
Object = "{F9043C88-F6F2-101A-A3C9-08002B2F49FB}#1.2#0"; "Comdlg32.ocx"
Begin VB.Form frmEncFiles
BorderStyle = 1 'Fixed Single
ClientHeight = 4800
ClientLeft = 1560
ClientTop = 1845
ClientWidth = 5565
Icon = "frmEncFiles.frx":0000
LinkTopic = "Form1"
MaxButton = 0 'False
MinButton = 0 'False
ScaleHeight = 4800
ScaleWidth = 5565
Begin VB.Frame Frame1
Caption = "Cipher Algorithm"
Height = 540
Left = 150
TabIndex = 13
Top = 825
Width = 5265
Begin VB.OptionButton optCipher
Caption = "RC4"
Height = 240
Index = 0
Left = 225
TabIndex = 18
Top = 225
Value = -1 'True
Width = 765
End
Begin VB.OptionButton optCipher
Caption = "RC2"
Height = 240
Index = 1
Left = 1050
TabIndex = 17
Top = 225
Width = 765
End
Begin VB.OptionButton optCipher
Caption = "DES"
Height = 240
Index = 2
Left = 2025
TabIndex = 16
Top = 225
Width = 765
End
Begin VB.OptionButton optCipher
Caption = "3DES"
Height = 240
Index = 3
Left = 2925
TabIndex = 15
Top = 225
Width = 765
End
Begin VB.OptionButton optCipher
Caption = " 3DES-112"
Height = 240
Index = 4
Left = 3900
TabIndex = 14
Top = 225
Width = 1140
End
End
Begin VB.TextBox txtData
Height = 315
Index = 0
Left = 180
TabIndex = 0
Top = 1755
Width = 5235
End
Begin MSComDlg.CommonDialog CD
Left = 4980
Top = 3075
_ExtentX = 847
_ExtentY = 847
_Version = 393216
End
Begin VB.TextBox txtData
BackColor = &H00FFFFC0&
Height = 315
Index = 3
Left = 180
Locked = -1 'True
TabIndex = 11
TabStop = 0 'False
Top = 3795
Width = 4635
End
Begin VB.TextBox txtData
BackColor = &H00FFFFC0&
Height = 315
Index = 2
Left = 180
Locked = -1 'True
TabIndex = 9
TabStop = 0 'False
Top = 3135
Width = 4635
End
Begin VB.CommandButton cmdChoice
Height = 360
Index = 1
Left = 4980
Picture = "frmEncFiles.frx":030A
Style = 1 'Graphical
TabIndex = 2
Top = 2475
Width = 435
End
Begin VB.TextBox txtData
Height = 315
Index = 1
Left = 180
TabIndex = 1
Top = 2475
Width = 4635
End
Begin VB.CommandButton cmdChoice
Caption = "&Test"
BeginProperty Font
Name = "MS Sans Serif"
Size = 8.25
Charset = 0
Weight = 700
Underline = 0 'False
Italic = 0 'False
Strikethrough = 0 'False
EndProperty
Height = 375
Index = 0
Left = 3360
TabIndex = 3
Top = 4275
Width = 975
End
Begin VB.CommandButton cmdChoice
Caption = "&Cancel"
BeginProperty Font
Name = "MS Sans Serif"
Size = 8.25
Charset = 0
Weight = 700
Underline = 0 'False
Italic = 0 'False
Strikethrough = 0 'False
EndProperty
Height = 375
Index = 2
Left = 4440
TabIndex = 4
Top = 4275
Width = 975
End
Begin VB.Label Label1
BackStyle = 0 'Transparent
Caption = "Input a password / passphrase (Default password used if left blank)"
Height = 195
Index = 1
Left = 240
TabIndex = 12
Top = 1515
Width = 5130
End
Begin VB.Label Label1
AutoSize = -1 'True
BackStyle = 0 'Transparent
Caption = "Name and location of decrypted file"
Height = 195
Index = 4
Left = 240
TabIndex = 10
Top = 3555
Width = 2505
End
Begin VB.Label Label1
AutoSize = -1 'True
BackStyle = 0 'Transparent
Caption = "Name and location of encrypted file"
Height = 195
Index = 3
Left = 240
TabIndex = 8
Top = 2895
Width = 2505
End
Begin VB.Label Label1
BackStyle = 0 'Transparent
Caption = "Enter full path\filename or browse for a file with the button on the right."
Height = 195
Index = 2
Left = 240
TabIndex = 7
Top = 2235
Width = 5010
End
Begin VB.Label lblMyLabel
BackStyle = 0 'Transparent
Height = 420
Left = 180
TabIndex = 6
Top = 4275
Width = 2925
End
Begin VB.Label lblTitle
Alignment = 2 'Center
BackColor = &H00C00000&
BorderStyle = 1 'Fixed Single
Caption = "Test File Encryption"
BeginProperty Font
Name = "Times New Roman"
Size = 18
Charset = 0
Weight = 700
Underline = 0 'False
Italic = -1 'True
Strikethrough = 0 'False
EndProperty
ForeColor = &H00FFFFFF&
Height = 555
Left = 120
TabIndex = 5
Top = 120
Width = 5310
End
End
Attribute VB_Name = "frmEncFiles"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = False
Option Explicit
' ===========================================================================
' DATE NAME DESCRIPTION
' ----------- ------------------------ ------------------------------------
' 30-DEC-2000 Kenneth Ives Written by kenaso@home.com
' ---------------------------------------------------------------------------
' Define module level constants
' ---------------------------------------------------------------------------
Private m_intCipher As Integer ' Added 09-Sep-2001 KCI
Private m_strFilename As String
Private m_strEncryptName As String
Private m_strDecryptName As String
Private arData() As Byte ' added 08-Jan-2001 KCI
Private arPWord() As Byte ' added 08-Jan-2001 KCI
Private Sub Process_File()
' ***************************************************************************
' Routine: Process_File
'
' Description: First, test to see if the file exists and it is not empty.
' Then encrypt and decrypt the file.
'
' ===========================================================================
' DATE NAME / eMAIL
' DESCRIPTION
' ----------- --------------------------------------------------------------
' 08-JAN-2001 Kenneth Ives kenaso@home.com
' Converted data to byte array and then encrypt/decrypt the data.
' Resolves the erroneous displays I sometimes encounter. Thanks
' to Haakan Gustavsson for pointing me in the right direction.
' 18-JAN-2001 Kenneth Ives kenaso@home.com
' The decoded file wwas be one byte larger than the source. To
' fix this, subtract 1 from the file size to accomodate the zero
' based array.
' Fix suggested by Harbinder Gill hgill@altavista.net
' 21-JAN-2001 Kenneth Ives kenaso@home.com
' Found that when you use PUT to write a byte array to a
' file, the last character is converted to a NULL. To get
' around this quirk, I converted the decrypted byte array to
' a text string and then PUT it in the output file.
' ***************************************************************************
' ---------------------------------------------------------------------------
' Define local variables
' ---------------------------------------------------------------------------
Dim lngFileSize As Long
Dim hFile As Integer
Dim strText As String
Dim cCrypto As CryptKci.clsCryptoAPI
' ---------------------------------------------------------------------------
' Make sure that the file exists and is not empty.
' ---------------------------------------------------------------------------
Set cCrypto = New CryptKci.clsCryptoAPI
On Error Resume Next
lngFileSize = FileLen(m_strFilename)
If Err <> 0 Or lngFileSize = 0 Then
MsgBox "Cannot locate: " & vbCrLf & _
m_strFilename & vbCrLf & "or this is an empty file.", _
vbOKOnly, "File not found"
Clear_Variables
Exit Sub
End If
On Error GoTo 0 ' nullify the previous "On Error"
On Error GoTo Process_File_Errors
' ---------------------------------------------------------------------------
' resize the data array to accommodate the file contents
'
' For encrypting, leave one extra element in the array to handle the last
' NULL appended to the excrypted file
' ---------------------------------------------------------------------------
ReDim arData(lngFileSize)
' ---------------------------------------------------------------------------
' Create empty receiving files
' ---------------------------------------------------------------------------
hFile = FreeFile ' get first free file handle
Open m_strEncryptName For Output As #hFile
Close #hFile
Open m_strDecryptName For Output As #hFile
Close #hFile
' ---------------------------------------------------------------------------
' load the byte array with the file contents from the input file using one
' command then close file.
' ---------------------------------------------------------------------------
Open m_strFilename For Binary Access Read As #hFile
Get hFile, , arData
Close #hFile
' ---------------------------------------------------------------------------
' See if there is a password
' ---------------------------------------------------------------------------
If Len(Trim$(txtData(0).Text)) = 0 Then
ReDim arPWord(0)
Else
arPWord = cCrypto.StringToByteArray(txtData(0).Text)
cCrypto.Password = arPWord()
End If
' ---------------------------------------------------------------------------
' set up parameters prior to encryption
' ---------------------------------------------------------------------------
cCrypto.InputData = arData()
cCrypto.EnhancedProvider = g_blnEnhancedProvider
' ---------------------------------------------------------------------------
' Encrypt the data and return in a byte array
' ---------------------------------------------------------------------------
If cCrypto.Encrypt(g_intHashType, m_intCipher) Then
arData = cCrypto.OutputData
Else
GoTo CleanUp
End If
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