def get_trace(self): """ Do not take any argument. Returns the next triplet (message, cipher, trace), where: - message is an ascii string containing a 64 bits clear message in hexadecimal, - cipher is an ascii string containing a 64 bits ciphered message in hexadecimal, - trace is a float vector containing a trace during the cipher operation. """ if self.__i == len( self.__dbd ): return None, None, None; # Error, since we have reached the last file trace_name= self.__dbd[self.__i] self.__i+= 1; try: cmd= "SELECT message, cipher, data FROM "+self.__table+" WHERE name = '"+trace_name+"'" self.__curs.execute( cmd ) one= self.__curs.fetchone() msg, crypt, raw_data= one #if db_name=='pgdb': #raw_data= db.unescape_bytea( raw_data ) return msg, crypt, parse_binary( str(raw_data) ) #except db.DatabaseError, e: except: #print e return 'err', 'err', 'err'
def test(): sb= sbox_breaker( 1 ) tdb= traces_database(__TABLE__) for i in range(10): msg, crypt, trace= tdb.get_trace() sb.process(msg, parse_binary(trace)) best_key= sb.get_keys()[0] print "processed trace:", i, "- best key is:", best_key
def test():
ke= key_estimator(0, 56) # 56 is the correct key for the sbox #0
tdb= traces_database.traces_database( __TABLE__ )
for i in range(10):
msg, crypt, trace= tdb.get_trace()
ke.process(msg, parse_binary(trace))
print "processed trace:", i, "- mark is:", ke.get_mark()
fd= open("output.csv", "w")
for f in ke.get_differential():
fd.write(str(f)+"\n")
fd.close()
def get_file(self, filename): """ Returns the raw trace (header plus float vector) of <filename> """ try: cmd= "SELECT encode(data, 'escape') FROM "+self.__table+" WHERE filename = '"+filename+"'" self.__curs.execute( cmd ) raw_data= self.__curs.fetchone() if db_name=='pgdb': raw_data= db.unescape_bytea( raw_data ) return parse_binary( str(raw_data) ) except db.DatabaseError, e: print e sys.exit(1)
def get_trace(self): """ Do not take any argument. Returns the next triplet (message, cipher, trace), where: - message is an ascii string containing a 64 bits clear message in hexadecimal, - cipher is an ascii string containing a 64 bits ciphered message in hexadecimal, - trace is a float vector containing a trace during the cipher operation. """ if self.__i == len( self.__dd ): return None, None, None # Error, since we have reached the last file trace_name= self.__dd[self.__i] self.__i+= 1 self.__fd= open( self.__dn + '/' + trace_name, 'r' ) raw_data= self.__fd.read() return get_msg( trace_name ), get_cph( trace_name ), parse_binary( raw_data )
