Python 3

求补码

代码作用：
输入一个十进制的整数
输出它的八位二进制补码
其中8可以修改为其他数，例如改成32就会输出32位的二进制数

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n=int(input())
if n >0:
    b=bin(n)[2:]
    list_b = [0] * (8 - len(b))
    list_b=list_b+list(map(int,b))
    str_b="".join('%d'%i for i in list_b)
    print(str_b)
elif n<0:
    b=bin(n)[3:]
    list_b=[1]*(8-len(b))
    list_b=list_b+list(map(lambda x: (int(x) + 1) % 2, b))
    str_b = "".join('%d' % i for i in list_b)
    int_b=int(str_b,base=2)+1
    ans=bin(int_b)[2:]
    print(ans)
else:
    print("0"*8)

base加密

代码作用:
读取1.txt中需要加密的明文
输出经过base64加密后的密文到2.txt

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# -*- coding:utf-8 -*-
import random
from base64 import *

process = {
    '16': lambda x: b16encode(x),
    '32': lambda x: b32encode(x),
    '64': lambda x: b64encode(x),
}
s = ""
with open('1.txt', 'r', encoding='UTF-8') as f:  # 读取需要编码的内容
    s = "".join(f.readlines()).encode('utf-8')

for i in range(random.randint(10, 20)):  # 随机循环
    s = process[random.choice(['16', '32', '64'])](s)  # 随机编码

with open('2.txt', 'w', encoding='UTF-8') as f:  # 保存编码后的结果
    f.write(str(s, 'utf-8'))

base解密

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#-*- coding:utf-8 -*-
import base64

s=''
with open('easybase-4-现代.txt', 'r', encoding='UTF-8') as f:
    s="".join(f.readlines()).encode('utf-8')
src=s
while True:
    try:
        src=s
        s=base64.b16decode(s)
        str(s,'utf-8')
        continue
    except:
        pass
    try:
        src=s
        s=base64.b32decode(s)
        str(s,'utf-8')
        continue
    except:
        pass
    try:
        src=s
        s=base64.b64decode(s)
        str(s,'utf-8')
        continue
    except:
        pass
    break
with open('321.txt','w', encoding='utf-8') as file:
    file.write(str(src,'utf-8'))
print("ok!")

md5解密脚本（已知部分明文和密文）

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import string
import hashlib
a='s3c{P7?Y0OG?0XPC?ZPK}'
b='b235????f2da???874???63007?4b897'
dic1=string.digits+string.ascii_lowercase+string.ascii_uppercase
for i1 in dic1:
    for i2 in dic1:
        for i3 in dic1:
            bb='s3c{P7'+i1+'Y0OG'+i2+'0XPC'+i3+'ZPK}'
            aa=hashlib.md5(bb.encode('utf-8'))
            bbb=aa.hexdigest()
            if (bbb[:4]=='b235'):
                print(i1,i2,i3)

可变换码表base64解密脚本

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