On Wednesday, April 13, 2016 at 9:29:45 PM UTC+8, Chris Angelico wrote: > On Wed, Apr 13, 2016 at 11:18 PM, durgadevi1 > <srirajarajeswaridevikr...@gmail.com> wrote: > > > > The output from the file is given below: > > > > b'$//W?\xc0\x829\xa2\xb9\x13\x8c\xd5{\' > > > > > > I used the type() to identify the class and its a byte class. > > > > I saw many \x and thought it might be hex. > > > > > > So, I used binascii.hexlify() and got the following output: > > b'242f2f573fc08239a2b9138cd57b' > > > > Now, this output is being encrypted and I need to perform an XOR operation > > on it in order to retrieve a secret message. > > > > But, I'm not sure how to code the XOR operation. How do I code that? > > > > What you have is a series of bytes. They don't have any obvious > meaning right there, so you're going to have to figure out what to XOR > it with. > > Let's just guess that you want to xor with the byte value 0xAA. We can > do that fairly simply, using integer operations. > > >>> data = b'$//W?\xc0\x829\xa2\xb9\x13\x8c\xd5{\\' > >>> bytes(b ^ 0xAA for b in data) > b'\x8e\x85\x85\xfd\x95j(\x93\x08\x13\xb9&\x7f\xd1\xf6' > > Well, that doesn't look much more intelligible. We can try a few other > byte values pretty easily: > > >>> bytes(b ^ 0x17 for b in data) > b'388@(\xd7\x95.\xb5\xae\x04\x9b\xc2lK' > >>> bytes(b ^ 0x9D for b in data) > b'\xb9\xb2\xb2\xca\xa2]\x1f\xa4?$\x8e\x11H\xe6\xc1' > >>> bytes(b ^ 0xE2 for b in data) > b'\xc6\xcd\xcd\xb5\xdd"`\xdb@[\xf1n7\x99\xbe' > > but it still doesn't look very promising. You're going to need to know > the key - the byte value, or sequence of byte values, to XOR with. > > ChrisA
Ok thank you ChrisA. :) I would like to check with you whether using binascii.hexlify() to convert the series of bytes into alphabets and integers is correct. -- https://mail.python.org/mailman/listinfo/python-list