選択できるのは25トピックまでです。
トピックは、先頭が英数字で、英数字とダッシュ('-')を使用した35文字以内のものにしてください。
35 行
870 B
35 行
870 B
from base64 import *
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def enkripsi(plain, keys):
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enc = []
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plain = b64encode(plain)
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for i, l in enumerate(plain):
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kunci = ord(keys[i % len(keys)])
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teks = ord(l)
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enc.append(chr((teks + kunci) % 127))
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#enc = teks + kunci
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return ''.join(enc)
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def findKey():
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key = []
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known = b64encode("IDCC{")
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file = open("enkripsi", "rb")
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file = file.read()
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for i, l in enumerate(known):
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kunci = ord(file[i])
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teks = ord(l)
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key.append((chr((kunci - teks) % 127)))
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return ''.join(key)
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def decryption():
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key = "raja"
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flag = []
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file = open("enkripsi", "r").read()
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for i, l in enumerate(file):
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kunci = ord(key[i % len(key)])
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cipher = ord(l)
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flag.append(chr((cipher - kunci) % 127))
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return ''.join(flag)
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print findKey()
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print b64decode(decryption())
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