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BRL.Stream Error

BlitzMax Forums/BlitzMax Programming/BRL.Stream Error

Firstdeathmaker(Posted 2014) [#1]
Hello,

I just got informed, that my crypt module that I wrote a couple of years ago isn't working any more. I tried it out by myself, but I also get an error that I traced back into BRL.Stream. Does anybody have a clue how I can fix that error?

Here is my module + example code:
http://www.blitzforum.de/upload/file.php?id=3654


Derron(Posted 2014) [#2]
Your AES-Code in the method cipher:

		While Not Eof(in)
			For Local i:Int = 0 Until Self.Nb
				Self.State[0, i] = ReadByte(in)
				Self.State[1, i] = ReadByte(in)
				Self.State[2, i] = ReadByte(in)
				Self.State[3, i] = ReadByte(in)
			Next
			Self.rijndael()
			For Local i:Int = 0 Until Self.Nb
				WriteByte(out, Self.State[0, i])
				WriteByte(out, Self.State[1, i])
				WriteByte(out, Self.State[2, i])
				WriteByte(out ,Self.State[3 ,i])
			Next
		Wend


Read loudly what is written there (ignoring the "for loop" for a second):

Did I reach EOF? NO? - do the following:
read a byte
read a byte
read a byte
read a byte
...

Now imagine this: file is at "EOF minus 2 Bytes"
read 1 -- ok
read 2 -- ok
read 3 -- ouch

So if you know: "within the while loop I read 4 Bytes" you have to do this:

while in.Pos() + 4 <= in.Size()
...
Wend


Another option is to wrap them into "Try Catch"-blocks.


Viel Spass,

bye
Ron


Firstdeathmaker(Posted 2014) [#3]
Ok, alright, thats totally my fault ok. Thank you for your effort!


Derron(Posted 2014) [#4]
Drop a line if it still crashes on reading.


bye
Ron