| 17 | - decrypt_file : boolean |
| 18 | """ |
| 19 | class XORCipher(object): |
| 20 | |
| 21 | def __init__(self, key = 0): |
| 22 | """ |
| 23 | simple constructor that receives a key or uses |
| 24 | default key = 0 |
| 25 | """ |
| 26 | |
| 27 | #private field |
| 28 | self.__key = key |
| 29 | |
| 30 | def encrypt(self, content, key): |
| 31 | """ |
| 32 | input: 'content' of type string and 'key' of type int |
| 33 | output: encrypted string 'content' as a list of chars |
| 34 | if key not passed the method uses the key by the constructor. |
| 35 | otherwise key = 1 |
| 36 | """ |
| 37 | |
| 38 | # precondition |
| 39 | assert (isinstance(key,int) and isinstance(content,str)) |
| 40 | |
| 41 | key = key or self.__key or 1 |
| 42 | |
| 43 | # make sure key can be any size |
| 44 | while (key > 255): |
| 45 | key -= 255 |
| 46 | |
| 47 | # This will be returned |
| 48 | ans = [] |
| 49 | |
| 50 | for ch in content: |
| 51 | ans.append(chr(ord(ch) ^ key)) |
| 52 | |
| 53 | return ans |
| 54 | |
| 55 | def decrypt(self,content,key): |
| 56 | """ |
| 57 | input: 'content' of type list and 'key' of type int |
| 58 | output: decrypted string 'content' as a list of chars |
| 59 | if key not passed the method uses the key by the constructor. |
| 60 | otherwise key = 1 |
| 61 | """ |
| 62 | |
| 63 | # precondition |
| 64 | assert (isinstance(key,int) and isinstance(content,list)) |
| 65 | |
| 66 | key = key or self.__key or 1 |
| 67 | |
| 68 | # make sure key can be any size |
| 69 | while (key > 255): |
| 70 | key -= 255 |
| 71 | |
| 72 | # This will be returned |
| 73 | ans = [] |
| 74 | |
| 75 | for ch in content: |
| 76 | ans.append(chr(ord(ch) ^ key)) |
nothing calls this directly
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no test coverage detected