AdiF
asked on
Reading Multiple Lines in a Text File
I encrypted text into a text file and I want to be able to make a kind of reader for the text file. By encrypting it again, it decrypts it. But it only decrypts the first line of the file. How would I be able to decrypt all of the lines in the text file? Here is my code:
Private Sub Command1_Click()
If Right(Text1.Text, 4) <> ".txt" Then Text1.Text = Text1.Text & ".txt"
Form1.Show
Open Text1.Text For Input As #1
Input #1, file
secret$ = file
PassWord$ = "not-telling"
Call Encrypt(secret$, PassWord$)
Text2.Text = secret$
Close #1
End Sub
Sub Encrypt(secret$, PassWord$)
L = Len(PassWord$)
For X = 1 To Len(secret$)
Char = Asc(Mid$(PassWord$, (X Mod L) - L * ((X Mod L) = 0), 1))
Mid$(secret$, X, 1) = Chr$(Asc(Mid$(secret$, X, 1)) Xor Char)
Next
End Sub
Private Sub Command1_Click()
If Right(Text1.Text, 4) <> ".txt" Then Text1.Text = Text1.Text & ".txt"
Form1.Show
Open Text1.Text For Input As #1
Input #1, file
secret$ = file
PassWord$ = "not-telling"
Call Encrypt(secret$, PassWord$)
Text2.Text = secret$
Close #1
End Sub
Sub Encrypt(secret$, PassWord$)
L = Len(PassWord$)
For X = 1 To Len(secret$)
Char = Asc(Mid$(PassWord$, (X Mod L) - L * ((X Mod L) = 0), 1))
Mid$(secret$, X, 1) = Chr$(Asc(Mid$(secret$, X, 1)) Xor Char)
Next
End Sub
If your text file is small you can replace your line..
Input #1, file
...with..
file = Input(LOF(1), 1)
This will read the whole file into the string variable file, even multi-lined.
Input #1, file
...with..
file = Input(LOF(1), 1)
This will read the whole file into the string variable file, even multi-lined.
'Encrypt/Unencrypt a file
'
Option Explicit
'
Private Function EncryptFile(sFile As String, iKey As Integer)
Dim iFake#
Dim x As String * 1
Dim lP As Long, z
Dim intNum#
intNum = FreeFile
iFake = Rnd(-1)
Randomize (iKey)
lP = 1
Open sFile For Binary As intNum
While lP <= LOF(intNum)
Get #intNum, lP, x
z = Asc(x) + Int(Rnd * 256)
If z > 255 Then z = z - 256
x = Chr(z)
Put #intNum, lP, x
lP = lP + 1
Wend
Close #intNum
MsgBox "Your file has been encrypted."
End Function
Private Function DecryptFile(sFile As String, iKey As Integer)
Dim iFake As Integer
Dim x As String * 1
Dim lP As Long, z
Dim intNum#
intNum = FreeFile
iFake = Rnd(-1)
Randomize (iKey)
lP = 1
Open sFile For Binary As #intNum
While lP <= LOF(intNum)
Get #intNum, lP, x
z = Asc(x) - Int(Rnd * 256)
If z < 0 Then z = z + 256
x = Chr(z)
Put #intNum, lP, x
lP = lP + 1
Wend
Close #intNum
MsgBox "Your file has been unencrypted."
End Function
' <<<< Form Event Code >>>>
Private Sub Command1_Click()
Call EncryptFile("a:\book1.xls"
End Sub
Private Sub Command2_Click()
Call DecryptFile("a:\book1.xls"
End Sub
ASKER
Thanks all but I think I'll stay with Kallik's method. Although now it prints everything from all the lines into one full line.
ASKER
Thanks all but I think I'll stay with Kallik's method. Although now it prints everything from all the lines into one full line.
Hello adi...hope you figure it out
ASKER
Maybe I wasn't clear, the lines of the text file appear in the textbox all on the same line. Even though Multiline is set to true.
ASKER CERTIFIED SOLUTION
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I would make an Reference to Microsoft Scripting RunTime. Then you can use following code:
Dim oObject As New FileSystemObject
Dim oTextStream As TextStream
Dim strSecret As String
Dim strPassword As String
Set oTextStream = oObject.OpenTextFile(Text1
strSecret = oTextStream.ReadAll
oTextStream.Close
strPassword = "not-telling"
Call Encrypt(strSecret, strPassword)
Text2.Text = strSecret
Dim oObject As New FileSystemObject
Dim oTextStream As TextStream
Dim strSecret As String
Dim strPassword As String
Set oTextStream = oObject.OpenTextFile(Text1
strSecret = oTextStream.ReadAll
oTextStream.Close
strPassword = "not-telling"
Call Encrypt(strSecret, strPassword)
Text2.Text = strSecret
use the following code:
Do
Line Input #1, secret$
PassWord$ = "not-telling"
Call Encrypt(secret$, PassWord$)
Text2.Text = secret$
Loop while not EOF(1)
this will but your decripted information in text2.text like you were trying in the begining
Do
Line Input #1, secret$
PassWord$ = "not-telling"
Call Encrypt(secret$, PassWord$)
Text2.Text = secret$
Loop while not EOF(1)
this will but your decripted information in text2.text like you were trying in the begining
vbwayne's suggestion has the file opened binary insted of input. No matter what method you use, you should do that. Because with encryption, one of your charactors may encrypt to an end of file and reading with input would give you nothing after that charactor
ASKER
mikeTmike, I rejected your answer because it still only read the first line of the encrypted text file. But Vbmaster's worked.
Thanks anyway! =)
Thanks anyway! =)
ASKER
Thanks!
Of all the people you got this to work =) :>
-- Adi
Of all the people you got this to work =) :>
-- Adi
Input #1, file
secret$ = file
PassWord$ = "not-telling"
Call Encrypt(secret$, PassWord$)
Text2.Text = secret$
Close #1
should read
Open Text1.Text For Input As #1
Result$=""
do
Input #1, InLine$
PassWord$ = "not-telling"
Call Encrypt(InLine$, PassWord$)
Result$=Result$+InLine$
loop while not EOF(1)
Close #1
Text2.Text=Result$