如何为python 3实现RC4加密？

Z时代
2024-01-10
分类：问答

我的代码引发此错误：如何为python 3实现RC4加密？

Error :  
    j = (j + S[i] + k[i % keyLen]) % 256 
    IndexError: list index out of range

我的代码：

#!/usr/bin/python3
key = 242 
def main(): 
    initializeS(key) 
#Key-Scheduling algorithm used to initialize a permutation in array S 
#Keylength is the number of bytes in the key it can vary from 0 - 256 bytes 
def initializeS(k): 
    k = str(k).encode('utf-8') 
    print(k) 
    keyLen = len(k) 
    S = [] 
    j = 0 
    for i in range(0, 256): 
     j = (j + S[i] + k[i % keyLen]) % 256 
     S[i], S[j] = S[j], S[i] 
return S 
main()