def solveTask23(plainText, key, kind, initCipherText, lun):
#8位的明文、密钥、密文转化为64位的二进制数组
initBitPlainText = operation.string2bin(plainText)
initBitKey = operation.string2bin(key)
cipher_bin = operation.string2bin(initCipherText)
sum = 0 #用来求平均数
if int(kind) == 2:
print("密钥固定，明文改变模式下,循环" + str(lun) + "次结果有：")
for n in range(1, 65):
print("************************")
print("明文改变" + str(n) + "位的情况下，循环" + str(lun) + "次：")
sum = 0
for i in range(1, lun + 1):
s1 = changeText(initBitPlainText, n)
str1 = DES.cipher(operation.bin2string(s1),
operation.bin2string(initBitKey))
str1_bin = operation.string2bin(str1)
dif = checkBitDif(cipher_bin, str1_bin)
sum = sum + dif
print("第" + str(i) + "次循环，密文改变" + str(dif) + "位")
avg = sum / lun
print("明文改变" + str(n) + "位,统计" + str(lun) + "次,密文平均改变" + str(avg) +
"位")
else:
print("明文固定，密钥改变模式下,循环" + str(lun) + "次结果有：")
for n in range(1, 65):
print("************************")
print("密钥改变" + str(n) + "位的情况下，循环" + str(lun) + "次：")
sum = 0
for i in range(1, lun + 1):
s2 = changeText(initBitKey, n)
str2 = DES.cipher(operation.bin2string(initBitPlainText),
operation.bin2string(s2))
str2_bin = operation.string2bin(str2)
dif = checkBitDif(cipher_bin, str2_bin)
sum = sum + dif
print("第" + str(i) + "次循环，密文改变" + str(dif) + "位")
avg = sum / lun
print("密钥改变" + str(n) + "位,统计" + str(lun) + "次,密文平均改变" + str(avg) +
"位")
else:
print("明文固定，密钥改变模式下,循环" + str(lun) + "次结果有：")
for n in range(1, 65):
print("************************")
print("密钥改变" + str(n) + "位的情况下，循环" + str(lun) + "次：")
sum = 0
for i in range(1, lun + 1):
s2 = changeText(initBitKey, n)
str2 = DES.cipher(operation.bin2string(initBitPlainText),
operation.bin2string(s2))
str2_bin = operation.string2bin(str2)
dif = checkBitDif(cipher_bin, str2_bin)
sum = sum + dif
print("第" + str(i) + "次循环，密文改变" + str(dif) + "位")
avg = sum / lun
print("密钥改变" + str(n) + "位,统计" + str(lun) + "次,密文平均改变" + str(avg) +
"位")
kind = input("选择模式(2代表密钥固定，明文改变模式；3代表明文固定，密钥改变模式):")
#n=int(input("请输入改变位数（1-64）："))
plainText = input("请输入明文（8位字母或数字）：")
key = input("请输入密钥（8位字母或数字）：")
initCipherText = DES.cipher(plainText, key)
print("生成的密文为：" + initCipherText)
print("即将开始循环统计【改变1-64位明文\密钥，循环N次】的DES密文改变结果：")
lun = int(input("请输入循环次数（1-100）："))
solveTask23(plainText, key, kind, initCipherText, lun)
