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pep up code

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This commit is contained in:
Eggert Jung
2020-11-23 00:15:56 +01:00
parent 8078694ee0
commit 7dec1c6eb9
1 changed files with 11 additions and 8 deletions
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19
src/vigenere/vig.py
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@@ -1,17 +1,20 @@
def encrypt(key, plaintext):
out=""
out = ""
for i in range(0, len(plaintext)):
out = out + chr(((ord(key[i%len(key)])+ord(plaintext[i])-(0x61+0x61))%26)+0x61)
out += chr(((ord(key[i % len(key)]) +
ord(plaintext[i]) - (2 * 0x61)) % 26)+0x61)
return out
def decrypt(key, cipertext):
out=""
out = ""
for i in range(0, len(cipertext)):
pln = ord(cipertext[i])-(ord(key[i%len(key)]) - 0x61)
pln = ord(cipertext[i])-(ord(key[i % len(key)]) - 0x61)
pln = pln + 26 if pln < 0x61 else pln
out += chr(pln)
return out
if __name__ == "__main__":
import argparse
parser = argparse.ArgumentParser()
@@ -22,11 +25,11 @@ if __name__ == "__main__":
parser.add_argument('--out', metavar='FILE')
args = parser.parse_args()
#strip non-alphabetic chars from file and convert to lower case
txt = ''.join([x for x in open(args.FILE, "r").read().lower() if x.isalpha()])
# strip non-alphabetic chars from file and convert to lower case
t = ''.join([x for x in open(args.FILE, "r").read().lower() if x.isalpha()])
if(args.encrypt != None):
print(encrypt(args.encrypt, txt))
print(encrypt(args.encrypt, t))
if(args.decrypt != None):
print(decrypt(args.decrypt, txt))
print(decrypt(args.decrypt, t))