simple xored string search using r2pipe

xorsearch.py

import r2pipe                                                                                                                                                                                                                                                                  
import sys                                                                                                                                                                                                                                                                     
import base64                                                                                                                                                                                                                                                                  
                                                                                                                                                                                                                                                                               
r2p=r2pipe.open(sys.argv[1], ['-nn'])                                                                                                                                                                                                                                                   
string_to_find = sys.argv[2]                                                                                                                                                                                                                                                   
                                                                                                                                                                                                                                                                               
def xor_string(string, key):                                                                                                                                                                                                                                                   
    out = [chr(ord(x) ^ key) for x in string]                                                                                                                                                                                                                                  
    return ''.join(out)                                                                                                                                                                                                                                                        
                                                                                                                                                                                                                                                                               
for i in xrange(0,256):                                                                                                                                                                                                                                                        
    needle = xor_string(string_to_find, i)                                                                                                                                                                                                                                     
    r2res = r2p.cmdj('izj')                                                                                                                                                                                                                                                    
    for i in r2res:                                                                                                                                                                                                                                                            
        r2_string = base64.b64decode(i['string'])                                                                                                                                                                                                                              
        if needle in r2_string:                                                                                                                                                                                                                                                
            print "vaddr={} paddr={} section={} string={}".format(i['vaddr'], i['paddr'], i['section'], r2_string)