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Zadanie3

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Encode wygląda okej
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Klaudia Kandulska 2018-06-27 21:30:58 +00:00
parent 65909526af
commit 2a39bdbcdf
1 changed files with 51 additions and 14 deletions
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61
Zadanie3
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@ -1,11 +1,43 @@
from sys import argv from sys import argv
def toString(binaryString):
return "".join([chr(int(binaryString[i:i+8],2)) for i in range(0,len(binaryString),8)])
def toBinary(string): def toBinary(string):
return "".join([format(ord(char),'#010b')[2:] for char in string]) return "".join([format(ord(char),'#010b')[2:] for char in string])
def binnahex(var):
all = {"0000": "0",
"0001": "1",
"0010": "2",
"0011": "3",
"0100": "4",
"0101": "5",
"0110": "6",
"0111": "7",
"1000": "8",
"1001": "9",
"1010": "A",
"1011": "B",
"1100": "C",
"1101": "D",
"1110": "E",
"1111": "F"
}
i = 0
output = ""
while (len(var) % 4 != 0):
var = "0" + var
while (i < len(var)):
output = output + all[var[i:i + 4]]
i = i + 4
output = output.lstrip("0")
output = "0" if len(output) == 0 else output
return output
def toString(binaryString):
return "".join([chr(int(binaryString[i:i+8],2)) for i in range(0,len(binaryString),8)])
#XOR #XOR
def xor(a, b): def xor(a, b):
@ -73,20 +105,25 @@ def decode(message_final,poly16):
def encode(message, poly16): def encode(message, poly16):
#konwersja z ascii do binarnego #konwersja z ascii do binarnego
aa=toBinary(message) aa=toBinary(message)
a=toString(aa)
l_poly16 = len(poly16) l_poly16 = len(poly16)
obroc = list(aa)
for i in range(l_poly16 - 1):
if obroc[i] == "0":
obroc[i] = "1"
elif obroc[i] == '1':
obroc[i] = "0"
aa = "".join(obroc)
# Dodajemy n-1 "0" do wiadomosci # Dodajemy n-1 "0" do wiadomosci
appended_message = aa + '0'*(l_poly16-1) appended_message = aa + '0'*(l_poly16-1)
remainder = divide(appended_message, poly16) remainder = divide(appended_message, poly16)
ab=binnahex(remainder)
message_final = aa + remainder message_final = a + ab
print("binarnie calosc : ", message_final) print("calosc : ", message_final)
#konwersja z binarnego do ascii print("crc : ", ab)
ab=toString(message_final)
print("w ascii : ", ab)
print("sprawdzenie : ")
decode(message_final, poly16)