def encode(plaintext, key):
square = mix_alphabet(key, ALPHABET25)
plaintext = plaintext.replace(" ","").upper()
#let's split the plaintext in digraph, while inserting X to avoid single letter digraphs
i = 0
digraphs = list()
while i < len(plaintext) - 1:
if i == len(plaintext) - 1: # wrong if last char is X
plaintext = insert_string(plaintext, i + 1, 'X')
elif i < len(plaintext) - 1 and plaintext[i] == plaintext[i + 1]:
plaintext = insert_string(plaintext, i + 1, 'X')
digraphs += [plaintext[i:i + 2]]
i += 2
ciphertext = str()
for digraph in digraphs:
#get both chars, their coordinates
char1, char2 = list(digraph)
row1, column1 = get_coordinates(square, char1)
row2, column2 = get_coordinates(square, char2)
encoded_row1, encoded_column1 = row1, column1
encoded_row2, encoded_column2 = row2, column2
#apply transformation rules
if row1 != row2 and column1 != column2: # making a rectangle - take the other 2 corners, with the same row respectively
encoded_row1, encoded_column1 = row1, column2
encoded_row2, encoded_column2 = row2, column1
elif row1 != row2 and column1 == column2: # same column - get the caracter down
encoded_row1 = (row1 + 1) % 5
encoded_row2 = (row2 + 1) % 5
elif row1 == row2 and column1 != column2: # same row - get the caracter right
encoded_column1 = (column1 + 1) % 5
encoded_column2 = (column2 + 1) % 5
#output resulting chars
encoded_char1 = get_char(square, encoded_row1, encoded_column1)
encoded_char2 = get_char(square, encoded_row2, encoded_column2)
ciphertext += encoded_char1 + encoded_char2
return ciphertext
def encode(plaintext, key):
square = mix_alphabet(key, ALPHABET25)
plaintext = plaintext.replace(" ", "").upper()
#let's split the plaintext in digraph, while inserting X to avoid single letter digraphs
i = 0
digraphs = list()
while i < len(plaintext) - 1:
if i == len(plaintext) - 1: # wrong if last char is X
plaintext = insert_string(plaintext, i + 1, 'X')
elif i < len(plaintext) - 1 and plaintext[i] == plaintext[i + 1]:
plaintext = insert_string(plaintext, i + 1, 'X')
digraphs += [plaintext[i:i + 2]]
i += 2
ciphertext = str()
for digraph in digraphs:
#get both chars, their coordinates
char1, char2 = list(digraph)
row1, column1 = get_coordinates(square, char1)
row2, column2 = get_coordinates(square, char2)
encoded_row1, encoded_column1 = row1, column1
encoded_row2, encoded_column2 = row2, column2
#apply transformation rules
if row1 != row2 and column1 != column2: # making a rectangle - take the other 2 corners, with the same row respectively
encoded_row1, encoded_column1 = row1, column2
encoded_row2, encoded_column2 = row2, column1
elif row1 != row2 and column1 == column2: # same column - get the caracter down
encoded_row1 = (row1 + 1) % 5
encoded_row2 = (row2 + 1) % 5
elif row1 == row2 and column1 != column2: # same row - get the caracter right
encoded_column1 = (column1 + 1) % 5
encoded_column2 = (column2 + 1) % 5
#output resulting chars
encoded_char1 = get_char(square, encoded_row1, encoded_column1)
encoded_char2 = get_char(square, encoded_row2, encoded_column2)
ciphertext += encoded_char1 + encoded_char2
return ciphertext
assert byteswap(0x12345678, 2) == 0x7856 #incorrect use but expected result
assert nibbleswap(0x1234, 2) == 0x2143
assert gethyphenstr(r"c:\WINDOWS\system32\drivers\http.sys") == r"c:\WINDOW [...] \http.sys"
assert getbinstr(0) == "0"
assert getbinstr(8) == "1000"
assert countmissing(0, 8) == 0
assert countmissing(3, 8) == 5
assert countmissing(8, 8) == 0
assert insert_string("abcd", 2, "1") == "ab1cd"
assert zip([1, 2], [0]) == [(1, 0)]
assert zip_extend([1, 2], [0], 0) == [(1, 0), (2, 0)]
assert zip_extend([0], [1, 2], 0) == [(1, 0), (2, 0)]
assert rorstr("abc") == "cab"
assert [rorstr("abc", i) for i in range(4)] == ['abc', 'cab', 'bca', 'abc']
assert setstr("abcde","d") == "deabc"
assert list(slice_and_pad("0001" + "0000" + "0", 4)) == ['0001', '0000', '01__']
assert list(slice_and_pad("0001" + "0000" + "00", 4)) == ['0001', '0000', '001_']
assert list(slice_and_pad("0001" + "0000" + "000", 4)) == ['0001', '0000', '0001', 'extr']
assert list(slice_and_pad("0001" + "0000" + "0000", 4)) == ['0001', '0000', '0000', '1___']
assert byteswap(0x12345678, 4) == 0x78563412
assert byteswap(0x12345678, 2) == 0x7856 #incorrect use but expected result
assert nibbleswap(0x1234, 2) == 0x2143
assert gethyphenstr(
r"c:\WINDOWS\system32\drivers\http.sys") == r"c:\WINDOW [...] \http.sys"
assert getbinstr(0) == "0"
assert getbinstr(8) == "1000"
assert countmissing(0, 8) == 0
assert countmissing(3, 8) == 5
assert countmissing(8, 8) == 0
assert insert_string("abcd", 2, "1") == "ab1cd"
assert zip([1, 2], [0]) == [(1, 0)]
assert zip_extend([1, 2], [0], 0) == [(1, 0), (2, 0)]
assert zip_extend([0], [1, 2], 0) == [(1, 0), (2, 0)]
assert rorstr("abc") == "cab"
assert [rorstr("abc", i) for i in range(4)] == ['abc', 'cab', 'bca', 'abc']
assert setstr("abcde", "d") == "deabc"
assert list(slice_and_pad("0001" + "0000" + "0",
4)) == ['0001', '0000', '01__']
assert list(slice_and_pad("0001" + "0000" + "00",
4)) == ['0001', '0000', '001_']
assert list(slice_and_pad("0001" + "0000" + "000",
