Hyperlisk Brainfuck crackme #1

I succesfully recovered all of my files from a broken hard drive, and found a old 2008 crackme done by a friend (where are you now ?).

But it's not a usual crackme... a brainf*ck one.

In case you didn't know, Brainfuck is one of those turing complete languages that has no apparent use in the real world.

But hey, being very very simple with a limited grammar, writing an interpreter should be easy.

I've already see a BF interpreter written entirely in standard LOLCode

crackme.bf ~

>++++++++[->++++++++<]>++.++++.<++++++[->------<]>--.<+++++++[->+++++<]>.<++++++

+[->++++++<]>+++++.<++++[->----<]>-.++.++++++++.<++++++[->-----<]>.<++++++[->+

+++<]>.<++++++++[->--------<]>-----.+++.++++++++++++++.<++++++[->------<]>---.<+

+++++++[->+++++++<]>+.<+++++++[->++++++<]>+++++.-------------.----.<++++[->+++

+<]>+++.<+++++[->---<]>.-.<++++++++[->--------<]>----.<++++++[->+++++<]>++++.<++

+++++[->+++++++<]>++++++.<+++++++++[->-------<]>.<+++++[->-----<]>-.<++++++[->++

++++<]>++++.<+++++++[->+++++++<]>.---------.-----------.+++++++++++++.------.---

.++++++++++.--------.<++++++++++[->---------<]>-------..<+++++++++[->++++++++<]>

+++++.<++++[->++++<]>+.-------.<++++[->++++<]>+++.<+++++++++[->---------<]>---.<

+++++++++[->++++++++<]>+.++++++++++.<+++++++++[->---------<]>--.<+++++++++[->+++

++++++<]>+++.------------.---.<++++++++[->--------<]>-----.<++++++++++[->+++++++

+<]>.<+++++[->---<]>.<++++[->++++<]>++..++++.--------.+++.--------------.<++++++

[->------<]>-.<+++++++[->-------<]>----.[<]>[-]>[-]>>>>>>>>>>>+<<<<<<<<<<<++++++

+++[-<++++++++>]>[-]+++++++++++[-<+++++++++++>]>[-]+++++++++++[-<++++++++++>

]<++>>[-]++++++++++[-<++++++++++>]<+>>[-]+++++++++++[-<++++++++++>]<++++>>[-],--

--------[++++++++++>,----------]<<[<]>[[-<<<<<<->>>>>>]<<<<<<[+[>]>-<]>+[-<]<[<]

>>>>>>>>]>-[[-]>[-]<+++++++++[->+++++++++<]>++.<+++++[->+++++<]>+++.+++..+++++++

.<+++++++++[->--------<]>-----.------------.<+++++++++[->+++++++++<]>++++++++.--

--------.++++++.<+++++++++[->---------<]>----.<++++++++[->++++++++<]>++++.+++++.

-----.++++++++++.<++++++++[->--------<]>-------.<+++++++++[->++++++++<]>+++++.<+

++++++++[->---------<]>---.<++++++++[->++++++++<]>+++++++.--.<+++++[->+++<]>.<++

+++++++[->---------<]>---.<+++++++++[->++++++++<]>+.+++++++++++.<++++++++[->----

----<]>------...--------------.<+++++++[->++++++<]>+.<+++++[->+++++<]>+..+++++++

++++.<++++++++++[->--------<]>.<+++++++++[->+++++++++<]>+++.--.+++++++.<++++[->-

---<]>.+++++.-------.<++++++++[->--------<]>------.<[-]>[-]+<]>-[[-]>[-]<+++++++

+[->++++++++<]>+++.<+++++++[->++++++<]>++.-.-------.+++++++++++.<++++[->----<]>-

.<++++[->++++<]>+++.++++++.<+++++++++[->---------<]>--------.-.<++++++++[->+++++

++<]>+.<+++++[->++++<]>++.++++++.<+++++++++[->---------<]>----.<++++++++[->+++++

+++<]>+++++++.++++++++.+++++.<+++++++++[->---------<]>---.<+++++++++[->++++++++<

]>+.+++++++++++.<+++++++++[->---------<]>--.<][-]>[-]++++++++++..<++++++++[->+++

+++++<]>++++++.<++++++[->+++++<]>++++.-------------.++++++++++++++..<+++++++++[-

>---------<]>--.<++++++++[->++++++++<]>+.+++++++++++++.+++++++++++.<+++++++++[->

---------<]>--------.<+++++++++[->++++++++<]>+++.------.<+++++[->++++<]>.<++++++

+++[->---------<]>--------.<+++++++++[->+++++++++<]>+++.-----.<+++++++++[->-----

---<]>-------.<++++++++[->++++++++<]>+++.++++++++++++.-.++++++.-----------.+++++

.+++++++.<++++[->----<]>.<+++++++[->-------<]>------...<,

You can convert BF code to C like code without much effort, 'Hyper' is serial.

(Try this: http://www.iwriteiam.nl/Ha_bf_online.html)

Use (or code) your own BF debugger with a memory view can also be a solution instead of learning the  language.

Learn more about BF ~

>	Move the pointer to the right
<	Move the pointer to the left
+	Increment the memory cell under the pointer
-	Decrement the memory cell under the pointer
.	Output the character signified by the cell at the pointer
,	Input a character and store it in the cell at the pointer
[	Jump past the matching ] if the cell under the pointer is 0
]	Jump back to the matching [ if the cell under the pointer is nonzer

Brainfuck Developer (IDE): http://4mhz.de/bfdev.html

Brainfuck archive: http://esoteric.sange.fi/brainfuck/

bf2c (a BF to C translator): http://code.google.com/p/junkdrawer/downloads/list

Sakura Card Captor image (I know the author of this crackme will like it) :