RC4篇

python实现

库调用

pip install pycryptodome

from Crypto.Cipher import ARC4
def rc4_encrypt(text, key):
    cipher=ARC4.new(key)
    enc=cipher.encrypt(text)
    return enc

def rc4_decrypt(text, key):
    cipher=ARC4.new(key)
    dec=cipher.decrypt(text)
    return dec

if __name__ == '__main__':
    # m='re100dayzhuji'
    # key='jibengong'
    # m=m.encode('utf-8')
    # key=key.encode('utf-8')
    m = b're100dayzhuji'
    key = b'jibengong'
    enc=rc4_encrypt(m, key)
    dec=rc4_decrypt(enc, key)
    print('加密后：',enc.hex(),'\n解密后：',dec.decode('utf-8'))

字符串

def rc4(key,data):
    if isinstance(key,str): #判断key数据类型,如果密钥是字符串，转换为字节串
        key=key.encode('utf-8')
    #1.初始化S盒
    s=list(range(256))
    j=0
    #2.KSA(密钥调度算法)
    for i in range(256):
        j=(j+s[i]+key[i%len(key)])%256
        s[i],s[j]=s[j],s[i]
    #3.PRGA(伪随机生成算法)加密
    i=j=0
    result=bytearray()
    for char in data:
        i=(i+1)%256
        j=(j+s[i])%256
        s[i],s[j]=s[j],s[i]
        k=s[(s[i]+s[j])%256]
        # print(type(char)) int类型
        result.append(char^k)
    return bytes(result)

if __name__ == '__main__':
    m='re100dayzhuji'
    key='jibengong'
    enc=rc4(key,m.encode('utf-8'))
    dec=rc4(key,enc)
    print('加密后: ',enc)
    print('解密后: ',dec.decode('utf-8'))

    # 加密后: b'9\x87\xf3\x86?&w#\xa7\xe7qd\x81'
    # 解密后: re100dayzhuji

Hex

import binascii
binascii.unhexlify()和binascii.hexlify()

from Crypto.Cipher import ARC4
import binascii
def rc4_encrypt(key,data):
    m=data.encode('utf-8')
    cipher = ARC4.new(key)
    enc=cipher.encrypt(m)
    enc=binascii.hexlify(enc).decode('utf-8')
    return enc
def rc4_decrypt(key,data):
    m=binascii.unhexlify(data) #十六进制明文转换为字节
    cipher = ARC4.new(key)
    return cipher.decrypt(m)

key=b'jibengong'
m='re100dayzhuji'
enc=rc4_encrypt(key,m)
dec=rc4_decrypt(key,enc)
print(enc)
print(dec.decode('utf-8'))

# 3987f3863f267723a7e7716481
# re100dayzhuji

附带hex格式处理f’{x:02x}’

hex_array=[]
result=''.join([f'{x:02x}' for x in hex_array])
print(result)