InCTF 2014 - Reverse 50

1. First Challenge was given python compiled File Used Python decompiler to get the original code.

root@Vijay:~/Desktop/inctf 14/reverse# file one
one: python 2.7 byte-compiled

I got the printable sequence array values.

 eflag = [131,
...  138,
...  219,
...  198,
...  201,
...  158,
...  151,
...  154,
...  134,
...  129,
...  128,
...  177,
...  135,
...  157,
...  177,
...  157,
...  154,
...  135,
...  130,
...  130,
...  177,
...  141,
...  129,
...  129,
...  130,
...  201,
...  199]
>>> eflag
[131, 138, 219, 198, 201, 158, 151, 154, 134, 129, 128, 177, 135, 157, 177, 157, 154, 135, 130, 130, 177, 141, 129, 129, 130, 201, 199]
>>> 
>>> flag = ''.join(map(chr, map(lambda x: x ^ 238, eflag)))
>>> 
>>> print flag
md5('python_is_still_cool')

Next is the compiled java class file, I used jad decompiler to get the original class file

root@Vijay:~/Desktop/inctf 14/reverse# file two.class 
two.class: compiled Java class data, version 51.0

root@Vijay:~/Desktop/inctf 14/reverse# jad two.class 
Parsing two.class...The class file version is 51.0 (only 45.3, 46.0 and 47.0 are supported)
 Generating challenge.jad

I got the printable sequence array values.

>>> flag2 = [106, 97, 50, 37, 36, 103, 94, 115, 94, 92, 96, 101, 94, 105, 105, 98, 107, 100, 98, 112, 92, 94, 111, 98, 92, 112, 113, 102, 105, 105, 92, 98, 94, 112, 118, 36, 38]

>>> ''.join([chr(i+3) for i in flag2])
"md5('java_challenges_are_still_easy')"