DHBW/Krypto_Grundlagen
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Reformatting code

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This commit is contained in:
Patrick Müller 2021-10-15 17:57:35 +02:00
parent 80ebb362a5
commit f13b667e6c
3 changed files with 23 additions and 21 deletions
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8
chapter_one/Multiplikative_Chiffre.py
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@ -18,8 +18,8 @@ def encrypt_text(cleartext: str, key: int):
for char in cleartext: for char in cleartext:
index = au.get_index_of_letter(char) index = au.get_index_of_letter(char)
newIndex = (index * key) % 26 new_index = (index * key) % 26
resulting += au.get_letter_at_index(newIndex) resulting += au.get_letter_at_index(new_index)
return resulting return resulting
@ -41,8 +41,8 @@ def decrypt_text(ciphertext: str, key: int):
for char in ciphertext: for char in ciphertext:
index = au.get_index_of_letter(char) index = au.get_index_of_letter(char)
newIndex = (index * decrypt_key) % 26 new_index = (index * decrypt_key) % 26
resulting += au.get_letter_at_index(newIndex) resulting += au.get_letter_at_index(new_index)
return resulting return resulting

28
chapter_one/Permutations-Chiffre.py
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@ -13,10 +13,10 @@ def encrypt_text(cleartext: str, key: [int]):
resulting = '' resulting = ''
for char in cleartext: for char in cleartext:
charIndex = au.get_index_of_letter(char) char_index = au.get_index_of_letter(char)
cipherIndex = key.index(charIndex) cipher_index = key.index(char_index)
cipherChar = au.get_letter_at_index(cipherIndex) cipher_char = au.get_letter_at_index(cipher_index)
resulting += cipherChar resulting += cipher_char
return resulting return resulting
@ -31,10 +31,10 @@ def decrypt_text(ciphertext: str, key: [int]):
resulting = '' resulting = ''
for char in ciphertext: for char in ciphertext:
charIndex = au.get_index_of_letter(char) char_index = au.get_index_of_letter(char)
clearIndex = key[charIndex] clear_index = key[char_index]
clearChar = au.get_letter_at_index(clearIndex) clear_char = au.get_letter_at_index(clear_index)
resulting += clearChar resulting += clear_char
return resulting return resulting
@ -50,20 +50,22 @@ def generate_key():
return indices return indices
def generate_key_with_keyword(keyword: str): def generate_key_with_keyword(keyword: str):
result = [] result = []
for char in keyword: for char in keyword:
charIndex = au.get_index_of_letter(char) char_index = au.get_index_of_letter(char)
if charIndex not in result: if char_index not in result:
result.append(charIndex) result.append(char_index)
remainingIndices = [i for i in range(26-len(result))] remaining_indices = [i for i in range(26 - len(result))]
result.extend(remainingIndices) result.extend(remaining_indices)
return result return result
if __name__ == '__main__': if __name__ == '__main__':
key = generate_key_with_keyword('patrick') key = generate_key_with_keyword('patrick')
print(key) print(key)

8
chapter_one/Tausch-Chiffre.py
View File

@ -23,8 +23,8 @@ def encrypt_text(cleartext: str, key1: int, key2: int):
for char in cleartext: for char in cleartext:
index = au.get_index_of_letter(char) index = au.get_index_of_letter(char)
newIndex = (index * key1 + key2) % 26 new_index = (index * key1 + key2) % 26
resulting += au.get_letter_at_index(newIndex) resulting += au.get_letter_at_index(new_index)
return resulting return resulting
@ -51,8 +51,8 @@ def decrypt_text(ciphertext: str, key1: int, key2: int):
for char in ciphertext: for char in ciphertext:
index = au.get_index_of_letter(char) index = au.get_index_of_letter(char)
newIndex = ((index - key2) * decrypt_key1) % 26 new_index = ((index - key2) * decrypt_key1) % 26
resulting += au.get_letter_at_index(newIndex) resulting += au.get_letter_at_index(new_index)
return resulting return resulting