Base64隱寫解密腳本

基於python3

import base64
path = input("請輸入加密文件路徑\n")
file = open(path)
a = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/"
aaa = ''
while True:
    text = file.readline()  # 只讀取一行內容
    # 判斷是否讀取到內容
    text = text.replace("\n", "")
    if not text:
        break
    if text.count('=') == 1:
        aaa = aaa + \
            str('{:02b}'.format((a.find(text[len(text)-2])) % 4))
    if text.count('=') == 2:
        aaa = aaa + \
            str('{:04b}'.format((a.find(text[len(text)-3])) % 16))
file.close()
t = ""
ttt = len(aaa)
ttt = ttt//8*8
for i in range(0,ttt,8):
    t = t + chr(int( aaa[i:i+8],2))
print(t)