-
Notifications
You must be signed in to change notification settings - Fork 0
Expand file tree
/
Copy pathvigenere.py
More file actions
51 lines (45 loc) · 1.45 KB
/
vigenere.py
File metadata and controls
51 lines (45 loc) · 1.45 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
ENG_ALPHABET = 'ABCDEFGHIJKLMNOPQRSTUVWXYZ'
def create_table(alphabet: str):
array = [[] for i in range(27)]
array[0].append(' ')
for i in alphabet:
array[0].append(i)
for i in range(1, 27):
array[i].append(alphabet[i - 1])
for i in range(1, 27):
for j in alphabet[i - 1:] + alphabet[:i - 1]:
array[i].append(j)
return array
def key_validation(key: str, alphabet: str=ENG_ALPHABET):
for i in key:
if i not in alphabet:
return False
return True
def encrypt(string: str, key: str, alphabet: str=ENG_ALPHABET):
array = create_table(alphabet)
out = ''
nkey = ''
spcs = 0
for i in range(len(string)):
nkey += key[i % len(key)]
for y in range(len(string)):
if string[y] in alphabet:
out += array[alphabet.find(string[y]) + 1][alphabet.find(nkey[y - spcs]) + 1]
else:
spcs += 1
out += string[y]
return out
def decrypt(string: str, key: str, alphabet: str=ENG_ALPHABET):
array = create_table(alphabet)
out = ''
nkey = ''
spcs = 0
for i in range(len(string)):
nkey += key[i % len(key)]
for y in range(len(string)):
if string[y] in alphabet:
out += array[0][array[alphabet.find(nkey[y - spcs]) + 1][1:].index(string[y]) + 1]
else:
spcs += 1
out += string[y]
return out