利用python实现AES三种模式ECB，CBC, OFB 加解密
#!/usr/bin/env python
# -*- coding:utf-8 -*-
# Author: feng
# coding:utf-8
import random
import time
import copy
import codecs
class AESE():
def __init__(self, blk, key, Nr): # 构造函数 blk:传入明文asc码列表，最大16字节，key:传入密码asc码列表，Nr:轮数
self.blk = blk # 明文列表
self.key = key # 密码列表
self.Nr = Nr
self.sbox = (0x63, 0x7c, 0x77, 0x7b, 0xf2, 0x6b, 0x6f, 0xc5, 0x30, 0x01, 0x67, 0x2b, 0xfe, 0xd7, 0xab, 0x76,
0xca, 0x82, 0xc9, 0x7d, 0xfa, 0x59, 0x47, 0xf0, 0xad, 0xd4, 0xa2, 0xaf, 0x9c, 0xa4, 0x72, 0xc0,
0xb7, 0xfd, 0x93, 0x26, 0x36, 0x3f, 0xf7, 0xcc, 0x34, 0xa5, 0xe5, 0xf1, 0x71, 0xd8, 0x31, 0x15,
0x04, 0xc7, 0x23, 0xc3, 0x18, 0x96, 0x05, 0x9a, 0x07, 0x12, 0x80, 0xe2, 0xeb, 0x27, 0xb2, 0x75,
0x09, 0x83, 0x2c, 0x1a, 0x1b, 0x6e, 0x5a, 0xa0, 0x52, 0x3b, 0xd6, 0xb3, 0x29, 0xe3, 0x2f, 0x84,
0x53, 0xd1, 0x00, 0xed, 0x20, 0xfc, 0xb1, 0x5b, 0x6a, 0xcb, 0xbe, 0x39, 0x4a, 0x4c, 0x58, 0xcf,
0xd0, 0xef, 0xaa, 0xfb, 0x43, 0x4d, 0x33, 0x85, 0x45, 0xf9, 0x02, 0x7f, 0x50, 0x3c, 0x9f, 0xa8,
0x51, 0xa3, 0x40, 0x8f, 0x92, 0x9d, 0x38, 0xf5, 0xbc, 0xb6, 0xda, 0x21, 0x10, 0xff, 0xf3, 0xd2,
0xcd, 0x0c, 0x13, 0xec, 0x5f, 0x97, 0x44, 0x17, 0xc4, 0xa7, 0x7e, 0x3d, 0x64, 0x5d, 0x19, 0x73,
0x60, 0x81, 0x4f, 0xdc, 0x22, 0x2a, 0x90, 0x88, 0x46, 0xee, 0xb8, 0x14, 0xde, 0x5e, 0x0b, 0xdb,
0xe0, 0x32, 0x3a, 0x0a, 0x49, 0x06, 0x24, 0x5c, 0xc2, 0xd3, 0xac, 0x62, 0x91, 0x95, 0xe4, 0x79,
0xe7, 0xc8, 0x37, 0x6d, 0x8d, 0xd5, 0x4e, 0xa9, 0x6c, 0x56, 0xf4, 0xea, 0x65, 0x7a, 0xae, 0x08,
0xba, 0x78, 0x25, 0x2e, 0x1c, 0xa6, 0xb4, 0xc6, 0xe8, 0xdd, 0x74, 0x1f, 0x4b, 0xbd, 0x8b, 0x8a,
0x70, 0x3e, 0xb5, 0x66, 0x48, 0x03, 0xf6, 0x0e, 0x61, 0x35, 0x57, 0xb9, 0x86, 0xc1, 0x1d, 0x9e,
0xe1, 0xf8, 0x98, 0x11, 0x69, 0xd9, 0x8e, 0x94, 0x9b, 0x1e, 0x87, 0xe9, 0xce, 0x55, 0x28, 0xdf,
0x8c, 0xa1, 0x89, 0x0d, 0xbf, 0xe6, 0x42, 0x68, 0x41, 0x99, 0x2d, 0x0f, 0xb0, 0x54, 0xbb, 0x16)
# xtime process
def xtime(self, x):
# 如果a7为1，进行亦或运算，与0x1b亦或
if (x & 0x80):
return (((x << 1) ^ 0x1b) & 0xff)
return x << 1
# MixColumns: Process the entire block
def MixColumns(self):
tmp = [0 for t in range(4)]
xt = [0 for q in range(4)]
n = 0
for x in range(4):
xt[0] = self.xtime(self.blk[n])
xt[1] = self.xtime(self.blk[n + 1])
xt[2] = self.xtime(self.blk[n + 2])
xt[3] = self.xtime(self.blk[n + 3])
tmp[0] = xt[0] ^ xt[1] ^ self.blk[n + 1] ^ self.blk[n + 2] ^ self.blk[n + 3]
tmp[1] = self.blk[n] ^ xt[1] ^ xt[2] ^ self.blk[n + 2] ^ self.blk[n + 3]
tmp[2] = self.blk[n] ^ self.blk[n + 1] ^ xt[2] ^ xt[3] ^ self.blk[n + 3]
tmp[3] = xt[0] ^ self.blk[n] ^ self.blk[n + 1] ^ self.blk[n + 2] ^ xt[3]
self.blk[n] = tmp[0]
self.blk[n + 1] = tmp[1]
self.blk[n + 2] = tmp[2]
self.blk[n + 3] = tmp[3]
n = n + 4
# ShiftRows:Shifts the entire block
def ShiftRows(self):
# 2nd row
t = self.blk[1]
self.blk[1] = self.blk[5]
self.blk[5] = self.blk[9]
self.blk[9] = self.blk[13]
self.blk[13] = t
# 3nd row
t = self.blk[2]
self.blk[2] = self.blk[10]
self.blk[10] = t
t = self.blk[6]
self.blk[6] = self.blk[14]
self.blk[14] = t
# 4nd row
t = self.blk[15]
self.blk[15] = self.blk[11]
self.blk[11] = self.blk[7]
self.blk[7] = self.blk[3]
self.blk[3] = t
# SubBytes
def SubBytes(self):
for x in range(16):
self.blk[x] = self.sbox[self.blk[x]]
# AddRoundKey
def AddRoundKey(self, key):
x = 0
k = [0 for m in range(16)]
for c in range(4):
for r in range(4):
k[x] = key[r][c]
x = x + 1
for y in range(16):
self.blk[y] ^= int(k[y])
# 打印
def show(self):
for i in range(16):
print(hex(self.blk[i]))
# Schedule a secret key for use.
def ScheduleKey(self, w, Nk):
Rcon = [0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 0x40, 0x80, 0x1b, 0x36]
for r in range(4):
for c in range(4):
w[0][r][c] = self.key[r + c * 4]
for i in range(1, self.Nr + 1, 1):
for j in range(Nk):
t = [0 for x in range(4)]
for r in range(4):
if j:
t[r] = w[i][r][j - 1]
else:
t[r] = w[i - 1][r][3]
if j == 0:
temp = t[0]
for r in range(3):
t[r] = self.sbox[t[(r + 1) % 4]]
t[3] = self.sbox[temp]
t[0] ^= int(Rcon[i - 1])
for r in range(4):
w[i][r][j] = w[i - 1][r][j] ^ t[r]
# 加密函数
def AesEncrypt(self):
outkey = [[[0 for col in range(4)] for row in range(4)] for s in range(11)]
self.ScheduleKey(outkey, 4)
self.AddRoundKey(outkey[0])
for x in range(1, self.Nr, 1):
self.SubBytes()
self.ShiftRows()
self.MixColumns()
self.AddRoundKey(outkey[x])
self.SubBytes()
self.ShiftRows()
self.AddRoundKey(outkey[10])
return self.blk
class AESD():
def __init__(self, blk, key, Nr):
self.blk = blk
self.key = key
self.Nr = Nr
self.sbox = (0x63, 0x7c, 0x77, 0x7b, 0xf2, 0x6b, 0x6f, 0xc5, 0x30, 0x01, 0x67, 0x2b, 0xfe, 0xd7, 0xab, 0x76,
0xca, 0x82, 0xc9, 0x7d, 0xfa, 0x59, 0x47, 0xf0, 0xad, 0xd4, 0xa2, 0xaf, 0x9c, 0xa4, 0x72, 0xc0,
0xb7, 0xfd, 0x93, 0x26, 0x36, 0x3f, 0xf7, 0xcc, 0x34, 0xa5, 0xe5, 0xf1, 0x71, 0xd8, 0x31, 0x15,
0x04, 0xc7, 0x23, 0xc3, 0x18, 0x96, 0x05, 0x9a, 0x07, 0x12, 0x80, 0xe2, 0xeb, 0x27, 0xb2, 0x75,
0x09, 0x83, 0x2c, 0x1a, 0x1b, 0x6e, 0x5a, 0xa0, 0x52, 0x3b, 0xd6, 0xb3, 0x29, 0xe3, 0x2f, 0x84,
0x53, 0xd1, 0x00, 0xed, 0x20, 0xfc, 0xb1, 0x5b, 0x6a, 0xcb, 0xbe, 0x39, 0x4a, 0x4c, 0x58, 0xcf,
0xd0, 0xef, 0xaa, 0xfb, 0x43, 0x4d, 0x33, 0x85, 0x45, 0xf9, 0x02, 0x7f, 0x50, 0x3c, 0x9f, 0xa8,
0x51, 0xa3, 0x40, 0x8f, 0x92, 0x9d, 0x38, 0xf5, 0xbc, 0xb6, 0xda, 0x21, 0x10, 0xff, 0xf3, 0xd2,
0xcd, 0x0c, 0x13, 0xec, 0x5f, 0x97, 0x44, 0x17, 0xc4, 0xa7, 0x7e, 0x3d, 0x64, 0x5d, 0x19, 0x73,
0x60, 0x81, 0x4f, 0xdc, 0x22, 0x2a, 0x90, 0x88, 0x46, 0xee, 0xb8, 0x14, 0xde, 0x5e, 0x0b, 0xdb,
0xe0, 0x32, 0x3a, 0x0a, 0x49, 0x06, 0x24, 0x5c, 0xc2, 0xd3, 0xac, 0x62, 0x91, 0x95, 0xe4, 0x79,
0xe7, 0xc8, 0x37, 0x6d, 0x8d, 0xd5, 0x4e, 0xa9, 0x6c, 0x56, 0xf4, 0xea, 0x65, 0x7a, 0xae, 0x08,
0xba, 0x78, 0x25, 0x2e, 0x1c, 0xa6, 0xb4, 0xc6, 0xe8, 0xdd, 0x74, 0x1f, 0x4b, 0xbd, 0x8b, 0x8a,
0x70, 0x3e, 0xb5, 0x66, 0x48, 0x03, 0xf6, 0x0e, 0x61, 0x35, 0x57, 0xb9, 0x86, 0xc1, 0x1d, 0x9e,
0xe1, 0xf8, 0x98, 0x11, 0x69, 0xd9, 0x8e, 0x94, 0x9b, 0x1e, 0x87, 0xe9, 0xce, 0x55, 0x28, 0xdf,
0x8c, 0xa1, 0x89, 0x0d, 0xbf, 0xe6, 0x42, 0x68, 0x41, 0x99, 0x2d, 0x0f, 0xb0, 0x54, 0xbb, 0x16)
def xtime(self, x):
if (x & 0x80):
return (((x << 1) ^ 0x1b) & 0xff)
return x << 1
def ReMixColumns(self):
tmp = [0 for q in range(4)]
xt1 = [0 for w in range(4)]
xt2 = [0 for e in range(4)]
xt3 = [0 for r in range(4)]
n = 0
for x in range(4):
xt1[0] = self.xtime(self.blk[n])
xt1[1] = self.xtime(self.blk[n + 1])
xt1[2] = self.xtime(self.blk[n + 2])
xt1[3] = self.xtime(self.blk[n + 3])
xt2[0] = self.xtime(self.xtime(self.blk[n]))
xt2[1] = self.xtime(self.xtime(self.blk[n + 1]))
xt2[2] = self.xtime(self.xtime(self.blk[n + 2]))
xt2[3] = self.xtime(self.xtime(self.blk[n + 3]))
xt3[0] = self.xtime(self.xtime(self.xtime(self.blk[n])))
xt3[1] = self.xtime(self.xtime(self.xtime(self.blk[n + 1])))
xt3[2] = self.xtime(self.xtime(self.xtime(self.blk[n + 2])))
xt3[3] = self.xtime(self.xtime(self.xtime(self.blk[n + 3])))
tmp[0] = xt1[0] ^ xt2[0] ^ xt3[0] ^ self.blk[n + 1] ^ xt1[1] ^ xt3[1] ^ self.blk[n + 2] ^ xt2[2] ^ xt3[2] ^ \
self.blk[n + 3] ^ xt3[3]
tmp[1] = self.blk[n] ^ xt3[0] ^ xt1[1] ^ xt2[1] ^ xt3[1] ^ self.blk[n + 2] ^ xt1[2] ^ xt3[2] ^ self.blk[
n + 3] ^ xt2[3] ^ xt3[3]
tmp[2] = self.blk[n] ^ xt2[0] ^ xt3[0] ^ self.blk[n + 1] ^ xt3[1] ^ xt1[2] ^ xt2[2] ^ xt3[2] ^ self.blk[
n + 3] ^ xt1[3] ^ xt3[3]
tmp[3] = self.blk[n] ^ xt1[0] ^ xt3[0] ^ self.blk[n + 1] ^ xt2[1] ^ xt3[1] ^ self.blk[n + 2] ^ xt3[2] ^ xt1[
3] ^ xt2[3] ^ xt3[3]
self.blk[n] = tmp[0]
self.blk[n + 1] = tmp[1]
self.blk[n + 2] = tmp[2]
self.blk[n + 3] = tmp[3]
n = n + 4
def ReShiftRows(self):
# 2nd row
t = self.blk[13]
self.blk[13] = self.blk[9]
self.blk[9] = self.blk[5]
self.blk[5] = self.blk[1]
self.blk[1] = t
# 3rd row
t = self.blk[2]
self.blk[2] = self.blk[10]
self.blk[10] = t
t = self.blk[6]
self.blk[6] = self.blk[14]
self.blk[14] = t
# 4th row
t = self.blk[3]
self.blk[3] = self.blk[7]
self.blk[7] = self.blk[11]
self.blk[11] = self.blk[15]
self.blk[15] = t
def ReSubBytes(self):
for i in range(16):
for j in range(256):
if (self.sbox[j] == self.blk[i]):
self.blk[i] = j
break
def AddRoundKey(self, key):
x = 0
k = [0 for m in range(16)]
for c in range(4):
for r in range(4):
k[x] = key[r][c]
x = x + 1
for y in range(16):
self.blk[y] ^= k[y]
def ScheduleKey(self, w, Nk):
Rcon = [0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 0x40, 0x80, 0x1b, 0x36]
for r in range(4):
for c in range(4):
w[0][r][c] = self.key[r + c * 4]
for i in range(1, self.Nr + 1, 1):
for j in range(Nk):
t = [0 for x in range(4)]
for r in range(4):
if j:
t[r] = w[i][r][j - 1]
else:
t[r] = w[i - 1][r][3]
if j == 0:
temp = t[0]
for r in range(3):
t[r] = self.sbox[t[(r + 1) % 4]]
t[3] = self.sbox[temp]
t[0] ^= int(Rcon[i - 1])
for r in range(4):
w[i][r][j] = w[i - 1][r][j] ^ t[r]
def AesDecrpyt(self, sign='ECB'):
outkey = []
outkey = [[[0 for col in range(4)] for row in range(4)] for s in range(11)] # 改
self.ScheduleKey(outkey, 4)
self.AddRoundKey(outkey[10])
self.ReShiftRows()
self.ReSubBytes()
for x in range(self.Nr - 1, 0, -1):
self.AddRoundKey(outkey[x])
self.ReMixColumns()
self.ReShiftRows()
self.ReSubBytes()
self.AddRoundKey(outkey[0])
if (sign == 'ECB'):
mText = ""
for x in range(16):
mText += chr(self.blk[x])
return mText
elif sign == 'CBC':
return self.blk
def StringToListN(string):
s = [0 for x in range(16)]
l = len(string)
for x in range(l):
s[x] = int(ord(string[x]))
return s
def octToHex(oct):
out = []
hex_list = [hex(x) for x in oct]
for i in hex_list:
out.append("%02x" % int(i[2:], 16))
hex_cipher = ""
for i in out:
hex_cipher += i
return hex_cipher
def HexToOctList(route):
with codecs.open(route,'r') as f:
content=f.read()
octList=[]
length=len(content)
for i in range(0, length, 2):
octList.append(int(content[i:i + 2], 16))
return octList
def getPlainText(route):
with codecs.open(route,'r','utf-8') as f:
plainText=f.read()
return plainText
def ECB(route,skey):
stratTime=time.time()
# --------------加密--------------------
key = StringToListN(skey)
length = len(plainText)
cipher = []
if length <= 16:
blk = StringToListN(plainText)
a = AESE(blk, key, 10)
rblk = a.AesEncrypt()
cipher.extend(rblk)
else:
for group in range(0, length, 16):
blk = StringToListN(plainText[group:group + 16])
a = AESE(blk, key, 10)
cipher.extend(a.AesEncrypt())
print("16进制密文为:")
hex_cipher = octToHex(cipher)
print(hex_cipher)
runTime=round(time.time()-stratTime,2)
print("加密时长为%f s"%runTime)
# ----------------------------解密-------------------
stratTime = time.time()
plain = ""
c_length = len(cipher)
if c_length <= 16:
blk = cipher
a = AESD(blk, key, 10)
rblk = a.AesDecrpyt()
plain += rblk
else:
for group in range(0, c_length, 16):
blk = cipher[group:group + 16]
# print(blk)
a = AESD(blk, key, 10)
rblk = a.AesDecrpyt()
plain += rblk
# print(plain)
print("解密密文为:")
print(plain)
runTime = round(time.time() - stratTime, 2)
print("解密时长为%f"%runTime)
def CBC(route,skey):
# 构造初始化向量
random.seed(time.time())
vector = [random.randint(0, 256) for y in range(16)]
print("初始向量为:", end="------")
print(vector)
original_vector = copy.deepcopy(vector)
print("开始加密")
plainText = getPlainText(route)
stratTime = time.time()
# ------------------加密--------------------
key = StringToListN(skey)
length = len(plainText)
cipher = []
xor_blk = [0 for x in range(16)]
if length <= 16:
blk = StringToListN(plainText)
print(blk)
for i in range(16):
xor_blk[i] = (blk[i] ^ vector[i])
a = AESE(xor_blk, key, 10)
rblk = a.AesEncrypt()
cipher.extend(rblk)
else:
for group in range(0, length, 16):
blk = StringToListN(plainText[group:group + 16])
for i in range(16):
xor_blk[i] = (blk[i] ^ vector[i])
a = AESE(xor_blk, key, 10)
group_cypher = a.AesEncrypt()
cipher.extend(group_cypher)
vector = copy.deepcopy(group_cypher)
# print(cipher)
hex_cipher = octToHex(cipher)
with codecs.open(r"aesCBC密文.txt",'w','utf-8') as f:
f.write(hex_cipher)
runTime = round(time.time() - stratTime, 2)
print("加密时长为%f s" % runTime)
# ----------------------------解密---------------------
# print(original_vector)
cipher=HexToOctList(r"aesCBC密文.txt")
print("开始解密")
stratTime = time.time()
plain = ""
c_length = len(cipher)
# print(c_length)
if c_length <= 16:
blk = cipher
a = AESD(blk, key, 10)
rblk = a.AesDecrpyt('CBC')
for i in range(16):
xor_blk[i] = original_vector[i] ^ rblk[i]
mText = ""
for x in range(16):
mText += chr(xor_blk[x])
plain += mText
else:
for group in range(0, c_length, 16):
newblk = cipher[group:group + 16] # 原密文
# print(newblk)
a = AESD(newblk, key, 10)
rblk = a.AesDecrpyt('CBC') # 解密后密文
for i in range(16):
xor_blk[i] = original_vector[i] ^ rblk[i]
original_vector = cipher[group:group + 16] # 更新异或密文
# print(original_vector)
mText = ""
for x in range(16):
mText += chr(xor_blk[x])
plain += mText
with codecs.open(r"aes解密CBC明文.txt",'w','utf-8') as f:
f.write(plain)
runTime = round(time.time() - stratTime, 2)
print("解密时长为%f s" % runTime)
def OFB(route,skey):
# 构造初始化向量
random.seed(time.time())
vector = [random.randint(20, 126) for y in range(16)]
original_vector = copy.deepcopy(vector)
print("初始向量为:", end="-----")
print(vector)
print("开始加密")
stratTime = time.time()
plainText = getPlainText(route)
# -------------------------加密--------------------------
key = StringToListN(skey)
length = len(plainText)
cipher = []
xor_blk = [0 for x in range(16)]
if length <= 16:
blk = StringToListN(plainText)
a = AESE(vector, key, 10) # 加密初始化向量
rblk = a.AesEncrypt()
for i in range(16):
xor_blk[i] = blk[i] ^ rblk[i]
cipher.extend(xor_blk)
else:
for group in range(0, length, 16):
blk = StringToListN(plainText[group:group + 16])
a = AESE(vector, key, 10)
# print(vector)
rblk = a.AesEncrypt()
for i in range(16):
xor_blk[i] = blk[i] ^ rblk[i]
cipher.extend(xor_blk)
# print(cipher)
hex_cipher = octToHex(cipher)
with codecs.open(r"aesOFB密文.txt",'w','utf-8') as f:
f.write(hex_cipher)
runTime = round(time.time() - stratTime, 2)
print("加密时长为%f s" % runTime)
# ------------------------解密--------------------
stratTime = time.time()
plain = ""
c_length = len(cipher)
# print(c_length)
if c_length <= 16:
blk = cipher
# print(original_vector)
a = AESE(original_vector, key, 10)
rblk = a.AesEncrypt()
for i in range(16):
xor_blk[i] = original_vector[i] ^ blk[i]
# print(xor_blk)
mText = ""
for x in range(16):
mText += chr(xor_blk[x])
plain += mText
else:
for group in range(0, c_length, 16):
blk = cipher[group:group + 16] # 原密文
# print(newblk)
a = AESE(original_vector, key, 10)
rblk = a.AesEncrypt() # 解密后密文
for i in range(16):
xor_blk[i] = rblk[i] ^ blk[i]
# print(original_vector)
mText = ""
for x in range(16):
mText += chr(xor_blk[x])
plain += mText
with codecs.open(r"aes解密OFB明文.txt",'w','utf-8') as f:
f.write(plain)
runTime = round(time.time() - stratTime, 2)
print("解密时长为%f" % runTime)
def main():
choice = '''
选择加密方式
(E)CB
(C)BC
(O)FB
(Q)uit
'''
while True:
your_choice = input(choice).lower()
if your_choice not in "ecqo":
print("你的输入不符合要求，请重新输入:")
continue
route = input("请输入要加密的文件路径")
skey = input("请输入加密秘钥")
if your_choice == 'e':
ECB(route,skey)
elif your_choice == 'c':
CBC(route,skey)
elif your_choice == 'o':
OFB(route,skey)
elif your_choice == 'q':
break
if __name__ == "__main__":
main()
# -*- coding:utf-8 -*-
# Author: feng
# coding:utf-8
import random
import time
import copy
import codecs
class AESE():
def __init__(self, blk, key, Nr): # 构造函数 blk:传入明文asc码列表，最大16字节，key:传入密码asc码列表，Nr:轮数
self.blk = blk # 明文列表
self.key = key # 密码列表
self.Nr = Nr
self.sbox = (0x63, 0x7c, 0x77, 0x7b, 0xf2, 0x6b, 0x6f, 0xc5, 0x30, 0x01, 0x67, 0x2b, 0xfe, 0xd7, 0xab, 0x76,
0xca, 0x82, 0xc9, 0x7d, 0xfa, 0x59, 0x47, 0xf0, 0xad, 0xd4, 0xa2, 0xaf, 0x9c, 0xa4, 0x72, 0xc0,
0xb7, 0xfd, 0x93, 0x26, 0x36, 0x3f, 0xf7, 0xcc, 0x34, 0xa5, 0xe5, 0xf1, 0x71, 0xd8, 0x31, 0x15,
0x04, 0xc7, 0x23, 0xc3, 0x18, 0x96, 0x05, 0x9a, 0x07, 0x12, 0x80, 0xe2, 0xeb, 0x27, 0xb2, 0x75,
0x09, 0x83, 0x2c, 0x1a, 0x1b, 0x6e, 0x5a, 0xa0, 0x52, 0x3b, 0xd6, 0xb3, 0x29, 0xe3, 0x2f, 0x84,
0x53, 0xd1, 0x00, 0xed, 0x20, 0xfc, 0xb1, 0x5b, 0x6a, 0xcb, 0xbe, 0x39, 0x4a, 0x4c, 0x58, 0xcf,
0xd0, 0xef, 0xaa, 0xfb, 0x43, 0x4d, 0x33, 0x85, 0x45, 0xf9, 0x02, 0x7f, 0x50, 0x3c, 0x9f, 0xa8,
0x51, 0xa3, 0x40, 0x8f, 0x92, 0x9d, 0x38, 0xf5, 0xbc, 0xb6, 0xda, 0x21, 0x10, 0xff, 0xf3, 0xd2,
0xcd, 0x0c, 0x13, 0xec, 0x5f, 0x97, 0x44, 0x17, 0xc4, 0xa7, 0x7e, 0x3d, 0x64, 0x5d, 0x19, 0x73,
0x60, 0x81, 0x4f, 0xdc, 0x22, 0x2a, 0x90, 0x88, 0x46, 0xee, 0xb8, 0x14, 0xde, 0x5e, 0x0b, 0xdb,
0xe0, 0x32, 0x3a, 0x0a, 0x49, 0x06, 0x24, 0x5c, 0xc2, 0xd3, 0xac, 0x62, 0x91, 0x95, 0xe4, 0x79,
0xe7, 0xc8, 0x37, 0x6d, 0x8d, 0xd5, 0x4e, 0xa9, 0x6c, 0x56, 0xf4, 0xea, 0x65, 0x7a, 0xae, 0x08,
0xba, 0x78, 0x25, 0x2e, 0x1c, 0xa6, 0xb4, 0xc6, 0xe8, 0xdd, 0x74, 0x1f, 0x4b, 0xbd, 0x8b, 0x8a,
0x70, 0x3e, 0xb5, 0x66, 0x48, 0x03, 0xf6, 0x0e, 0x61, 0x35, 0x57, 0xb9, 0x86, 0xc1, 0x1d, 0x9e,
0xe1, 0xf8, 0x98, 0x11, 0x69, 0xd9, 0x8e, 0x94, 0x9b, 0x1e, 0x87, 0xe9, 0xce, 0x55, 0x28, 0xdf,
0x8c, 0xa1, 0x89, 0x0d, 0xbf, 0xe6, 0x42, 0x68, 0x41, 0x99, 0x2d, 0x0f, 0xb0, 0x54, 0xbb, 0x16)
# xtime process
def xtime(self, x):
# 如果a7为1，进行亦或运算，与0x1b亦或
if (x & 0x80):
return (((x << 1) ^ 0x1b) & 0xff)
return x << 1
# MixColumns: Process the entire block
def MixColumns(self):
tmp = [0 for t in range(4)]
xt = [0 for q in range(4)]
n = 0
for x in range(4):
xt[0] = self.xtime(self.blk[n])
xt[1] = self.xtime(self.blk[n + 1])
xt[2] = self.xtime(self.blk[n + 2])
xt[3] = self.xtime(self.blk[n + 3])
tmp[0] = xt[0] ^ xt[1] ^ self.blk[n + 1] ^ self.blk[n + 2] ^ self.blk[n + 3]
tmp[1] = self.blk[n] ^ xt[1] ^ xt[2] ^ self.blk[n + 2] ^ self.blk[n + 3]
tmp[2] = self.blk[n] ^ self.blk[n + 1] ^ xt[2] ^ xt[3] ^ self.blk[n + 3]
tmp[3] = xt[0] ^ self.blk[n] ^ self.blk[n + 1] ^ self.blk[n + 2] ^ xt[3]
self.blk[n] = tmp[0]
self.blk[n + 1] = tmp[1]
self.blk[n + 2] = tmp[2]
self.blk[n + 3] = tmp[3]
n = n + 4
# ShiftRows:Shifts the entire block
def ShiftRows(self):
# 2nd row
t = self.blk[1]
self.blk[1] = self.blk[5]
self.blk[5] = self.blk[9]
self.blk[9] = self.blk[13]
self.blk[13] = t
# 3nd row
t = self.blk[2]
self.blk[2] = self.blk[10]
self.blk[10] = t
t = self.blk[6]
self.blk[6] = self.blk[14]
self.blk[14] = t
# 4nd row
t = self.blk[15]
self.blk[15] = self.blk[11]
self.blk[11] = self.blk[7]
self.blk[7] = self.blk[3]
self.blk[3] = t
# SubBytes
def SubBytes(self):
for x in range(16):
self.blk[x] = self.sbox[self.blk[x]]
# AddRoundKey
def AddRoundKey(self, key):
x = 0
k = [0 for m in range(16)]
for c in range(4):
for r in range(4):
k[x] = key[r][c]
x = x + 1
for y in range(16):
self.blk[y] ^= int(k[y])
# 打印
def show(self):
for i in range(16):
print(hex(self.blk[i]))
# Schedule a secret key for use.
def ScheduleKey(self, w, Nk):
Rcon = [0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 0x40, 0x80, 0x1b, 0x36]
for r in range(4):
for c in range(4):
w[0][r][c] = self.key[r + c * 4]
for i in range(1, self.Nr + 1, 1):
for j in range(Nk):
t = [0 for x in range(4)]
for r in range(4):
if j:
t[r] = w[i][r][j - 1]
else:
t[r] = w[i - 1][r][3]
if j == 0:
temp = t[0]
for r in range(3):
t[r] = self.sbox[t[(r + 1) % 4]]
t[3] = self.sbox[temp]
t[0] ^= int(Rcon[i - 1])
for r in range(4):
w[i][r][j] = w[i - 1][r][j] ^ t[r]
# 加密函数
def AesEncrypt(self):
outkey = [[[0 for col in range(4)] for row in range(4)] for s in range(11)]
self.ScheduleKey(outkey, 4)
self.AddRoundKey(outkey[0])
for x in range(1, self.Nr, 1):
self.SubBytes()
self.ShiftRows()
self.MixColumns()
self.AddRoundKey(outkey[x])
self.SubBytes()
self.ShiftRows()
self.AddRoundKey(outkey[10])
return self.blk
class AESD():
def __init__(self, blk, key, Nr):
self.blk = blk
self.key = key
self.Nr = Nr
self.sbox = (0x63, 0x7c, 0x77, 0x7b, 0xf2, 0x6b, 0x6f, 0xc5, 0x30, 0x01, 0x67, 0x2b, 0xfe, 0xd7, 0xab, 0x76,
0xca, 0x82, 0xc9, 0x7d, 0xfa, 0x59, 0x47, 0xf0, 0xad, 0xd4, 0xa2, 0xaf, 0x9c, 0xa4, 0x72, 0xc0,
0xb7, 0xfd, 0x93, 0x26, 0x36, 0x3f, 0xf7, 0xcc, 0x34, 0xa5, 0xe5, 0xf1, 0x71, 0xd8, 0x31, 0x15,
0x04, 0xc7, 0x23, 0xc3, 0x18, 0x96, 0x05, 0x9a, 0x07, 0x12, 0x80, 0xe2, 0xeb, 0x27, 0xb2, 0x75,
0x09, 0x83, 0x2c, 0x1a, 0x1b, 0x6e, 0x5a, 0xa0, 0x52, 0x3b, 0xd6, 0xb3, 0x29, 0xe3, 0x2f, 0x84,
0x53, 0xd1, 0x00, 0xed, 0x20, 0xfc, 0xb1, 0x5b, 0x6a, 0xcb, 0xbe, 0x39, 0x4a, 0x4c, 0x58, 0xcf,
0xd0, 0xef, 0xaa, 0xfb, 0x43, 0x4d, 0x33, 0x85, 0x45, 0xf9, 0x02, 0x7f, 0x50, 0x3c, 0x9f, 0xa8,
0x51, 0xa3, 0x40, 0x8f, 0x92, 0x9d, 0x38, 0xf5, 0xbc, 0xb6, 0xda, 0x21, 0x10, 0xff, 0xf3, 0xd2,
0xcd, 0x0c, 0x13, 0xec, 0x5f, 0x97, 0x44, 0x17, 0xc4, 0xa7, 0x7e, 0x3d, 0x64, 0x5d, 0x19, 0x73,
0x60, 0x81, 0x4f, 0xdc, 0x22, 0x2a, 0x90, 0x88, 0x46, 0xee, 0xb8, 0x14, 0xde, 0x5e, 0x0b, 0xdb,
0xe0, 0x32, 0x3a, 0x0a, 0x49, 0x06, 0x24, 0x5c, 0xc2, 0xd3, 0xac, 0x62, 0x91, 0x95, 0xe4, 0x79,
0xe7, 0xc8, 0x37, 0x6d, 0x8d, 0xd5, 0x4e, 0xa9, 0x6c, 0x56, 0xf4, 0xea, 0x65, 0x7a, 0xae, 0x08,
0xba, 0x78, 0x25, 0x2e, 0x1c, 0xa6, 0xb4, 0xc6, 0xe8, 0xdd, 0x74, 0x1f, 0x4b, 0xbd, 0x8b, 0x8a,
0x70, 0x3e, 0xb5, 0x66, 0x48, 0x03, 0xf6, 0x0e, 0x61, 0x35, 0x57, 0xb9, 0x86, 0xc1, 0x1d, 0x9e,
0xe1, 0xf8, 0x98, 0x11, 0x69, 0xd9, 0x8e, 0x94, 0x9b, 0x1e, 0x87, 0xe9, 0xce, 0x55, 0x28, 0xdf,
0x8c, 0xa1, 0x89, 0x0d, 0xbf, 0xe6, 0x42, 0x68, 0x41, 0x99, 0x2d, 0x0f, 0xb0, 0x54, 0xbb, 0x16)
def xtime(self, x):
if (x & 0x80):
return (((x << 1) ^ 0x1b) & 0xff)
return x << 1
def ReMixColumns(self):
tmp = [0 for q in range(4)]
xt1 = [0 for w in range(4)]
xt2 = [0 for e in range(4)]
xt3 = [0 for r in range(4)]
n = 0
for x in range(4):
xt1[0] = self.xtime(self.blk[n])
xt1[1] = self.xtime(self.blk[n + 1])
xt1[2] = self.xtime(self.blk[n + 2])
xt1[3] = self.xtime(self.blk[n + 3])
xt2[0] = self.xtime(self.xtime(self.blk[n]))
xt2[1] = self.xtime(self.xtime(self.blk[n + 1]))
xt2[2] = self.xtime(self.xtime(self.blk[n + 2]))
xt2[3] = self.xtime(self.xtime(self.blk[n + 3]))
xt3[0] = self.xtime(self.xtime(self.xtime(self.blk[n])))
xt3[1] = self.xtime(self.xtime(self.xtime(self.blk[n + 1])))
xt3[2] = self.xtime(self.xtime(self.xtime(self.blk[n + 2])))
xt3[3] = self.xtime(self.xtime(self.xtime(self.blk[n + 3])))
tmp[0] = xt1[0] ^ xt2[0] ^ xt3[0] ^ self.blk[n + 1] ^ xt1[1] ^ xt3[1] ^ self.blk[n + 2] ^ xt2[2] ^ xt3[2] ^ \
self.blk[n + 3] ^ xt3[3]
tmp[1] = self.blk[n] ^ xt3[0] ^ xt1[1] ^ xt2[1] ^ xt3[1] ^ self.blk[n + 2] ^ xt1[2] ^ xt3[2] ^ self.blk[
n + 3] ^ xt2[3] ^ xt3[3]
tmp[2] = self.blk[n] ^ xt2[0] ^ xt3[0] ^ self.blk[n + 1] ^ xt3[1] ^ xt1[2] ^ xt2[2] ^ xt3[2] ^ self.blk[
n + 3] ^ xt1[3] ^ xt3[3]
tmp[3] = self.blk[n] ^ xt1[0] ^ xt3[0] ^ self.blk[n + 1] ^ xt2[1] ^ xt3[1] ^ self.blk[n + 2] ^ xt3[2] ^ xt1[
3] ^ xt2[3] ^ xt3[3]
self.blk[n] = tmp[0]
self.blk[n + 1] = tmp[1]
self.blk[n + 2] = tmp[2]
self.blk[n + 3] = tmp[3]
n = n + 4
def ReShiftRows(self):
# 2nd row
t = self.blk[13]
self.blk[13] = self.blk[9]
self.blk[9] = self.blk[5]
self.blk[5] = self.blk[1]
self.blk[1] = t
# 3rd row
t = self.blk[2]
self.blk[2] = self.blk[10]
self.blk[10] = t
t = self.blk[6]
self.blk[6] = self.blk[14]
self.blk[14] = t
# 4th row
t = self.blk[3]
self.blk[3] = self.blk[7]
self.blk[7] = self.blk[11]
self.blk[11] = self.blk[15]
self.blk[15] = t
def ReSubBytes(self):
for i in range(16):
for j in range(256):
if (self.sbox[j] == self.blk[i]):
self.blk[i] = j
break
def AddRoundKey(self, key):
x = 0
k = [0 for m in range(16)]
for c in range(4):
for r in range(4):
k[x] = key[r][c]
x = x + 1
for y in range(16):
self.blk[y] ^= k[y]
def ScheduleKey(self, w, Nk):
Rcon = [0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 0x40, 0x80, 0x1b, 0x36]
for r in range(4):
for c in range(4):
w[0][r][c] = self.key[r + c * 4]
for i in range(1, self.Nr + 1, 1):
for j in range(Nk):
t = [0 for x in range(4)]
for r in range(4):
if j:
t[r] = w[i][r][j - 1]
else:
t[r] = w[i - 1][r][3]
if j == 0:
temp = t[0]
for r in range(3):
t[r] = self.sbox[t[(r + 1) % 4]]
t[3] = self.sbox[temp]
t[0] ^= int(Rcon[i - 1])
for r in range(4):
w[i][r][j] = w[i - 1][r][j] ^ t[r]
def AesDecrpyt(self, sign='ECB'):
outkey = []
outkey = [[[0 for col in range(4)] for row in range(4)] for s in range(11)] # 改
self.ScheduleKey(outkey, 4)
self.AddRoundKey(outkey[10])
self.ReShiftRows()
self.ReSubBytes()
for x in range(self.Nr - 1, 0, -1):
self.AddRoundKey(outkey[x])
self.ReMixColumns()
self.ReShiftRows()
self.ReSubBytes()
self.AddRoundKey(outkey[0])
if (sign == 'ECB'):
mText = ""
for x in range(16):
mText += chr(self.blk[x])
return mText
elif sign == 'CBC':
return self.blk
def StringToListN(string):
s = [0 for x in range(16)]
l = len(string)
for x in range(l):
s[x] = int(ord(string[x]))
return s
def octToHex(oct):
out = []
hex_list = [hex(x) for x in oct]
for i in hex_list:
out.append("%02x" % int(i[2:], 16))
hex_cipher = ""
for i in out:
hex_cipher += i
return hex_cipher
def HexToOctList(route):
with codecs.open(route,'r') as f:
content=f.read()
octList=[]
length=len(content)
for i in range(0, length, 2):
octList.append(int(content[i:i + 2], 16))
return octList
def getPlainText(route):
with codecs.open(route,'r','utf-8') as f:
plainText=f.read()
return plainText
def ECB(route,skey):
stratTime=time.time()
# --------------加密--------------------
key = StringToListN(skey)
length = len(plainText)
cipher = []
if length <= 16:
blk = StringToListN(plainText)
a = AESE(blk, key, 10)
rblk = a.AesEncrypt()
cipher.extend(rblk)
else:
for group in range(0, length, 16):
blk = StringToListN(plainText[group:group + 16])
a = AESE(blk, key, 10)
cipher.extend(a.AesEncrypt())
print("16进制密文为:")
hex_cipher = octToHex(cipher)
print(hex_cipher)
runTime=round(time.time()-stratTime,2)
print("加密时长为%f s"%runTime)
# ----------------------------解密-------------------
stratTime = time.time()
plain = ""
c_length = len(cipher)
if c_length <= 16:
blk = cipher
a = AESD(blk, key, 10)
rblk = a.AesDecrpyt()
plain += rblk
else:
for group in range(0, c_length, 16):
blk = cipher[group:group + 16]
# print(blk)
a = AESD(blk, key, 10)
rblk = a.AesDecrpyt()
plain += rblk
# print(plain)
print("解密密文为:")
print(plain)
runTime = round(time.time() - stratTime, 2)
print("解密时长为%f"%runTime)
def CBC(route,skey):
# 构造初始化向量
random.seed(time.time())
vector = [random.randint(0, 256) for y in range(16)]
print("初始向量为:", end="------")
print(vector)
original_vector = copy.deepcopy(vector)
print("开始加密")
plainText = getPlainText(route)
stratTime = time.time()
# ------------------加密--------------------
key = StringToListN(skey)
length = len(plainText)
cipher = []
xor_blk = [0 for x in range(16)]
if length <= 16:
blk = StringToListN(plainText)
print(blk)
for i in range(16):
xor_blk[i] = (blk[i] ^ vector[i])
a = AESE(xor_blk, key, 10)
rblk = a.AesEncrypt()
cipher.extend(rblk)
else:
for group in range(0, length, 16):
blk = StringToListN(plainText[group:group + 16])
for i in range(16):
xor_blk[i] = (blk[i] ^ vector[i])
a = AESE(xor_blk, key, 10)
group_cypher = a.AesEncrypt()
cipher.extend(group_cypher)
vector = copy.deepcopy(group_cypher)
# print(cipher)
hex_cipher = octToHex(cipher)
with codecs.open(r"aesCBC密文.txt",'w','utf-8') as f:
f.write(hex_cipher)
runTime = round(time.time() - stratTime, 2)
print("加密时长为%f s" % runTime)
# ----------------------------解密---------------------
# print(original_vector)
cipher=HexToOctList(r"aesCBC密文.txt")
print("开始解密")
stratTime = time.time()
plain = ""
c_length = len(cipher)
# print(c_length)
if c_length <= 16:
blk = cipher
a = AESD(blk, key, 10)
rblk = a.AesDecrpyt('CBC')
for i in range(16):
xor_blk[i] = original_vector[i] ^ rblk[i]
mText = ""
for x in range(16):
mText += chr(xor_blk[x])
plain += mText
else:
for group in range(0, c_length, 16):
newblk = cipher[group:group + 16] # 原密文
# print(newblk)
a = AESD(newblk, key, 10)
rblk = a.AesDecrpyt('CBC') # 解密后密文
for i in range(16):
xor_blk[i] = original_vector[i] ^ rblk[i]
original_vector = cipher[group:group + 16] # 更新异或密文
# print(original_vector)
mText = ""
for x in range(16):
mText += chr(xor_blk[x])
plain += mText
with codecs.open(r"aes解密CBC明文.txt",'w','utf-8') as f:
f.write(plain)
runTime = round(time.time() - stratTime, 2)
print("解密时长为%f s" % runTime)
def OFB(route,skey):
# 构造初始化向量
random.seed(time.time())
vector = [random.randint(20, 126) for y in range(16)]
original_vector = copy.deepcopy(vector)
print("初始向量为:", end="-----")
print(vector)
print("开始加密")
stratTime = time.time()
plainText = getPlainText(route)
# -------------------------加密--------------------------
key = StringToListN(skey)
length = len(plainText)
cipher = []
xor_blk = [0 for x in range(16)]
if length <= 16:
blk = StringToListN(plainText)
a = AESE(vector, key, 10) # 加密初始化向量
rblk = a.AesEncrypt()
for i in range(16):
xor_blk[i] = blk[i] ^ rblk[i]
cipher.extend(xor_blk)
else:
for group in range(0, length, 16):
blk = StringToListN(plainText[group:group + 16])
a = AESE(vector, key, 10)
# print(vector)
rblk = a.AesEncrypt()
for i in range(16):
xor_blk[i] = blk[i] ^ rblk[i]
cipher.extend(xor_blk)
# print(cipher)
hex_cipher = octToHex(cipher)
with codecs.open(r"aesOFB密文.txt",'w','utf-8') as f:
f.write(hex_cipher)
runTime = round(time.time() - stratTime, 2)
print("加密时长为%f s" % runTime)
# ------------------------解密--------------------
stratTime = time.time()
plain = ""
c_length = len(cipher)
# print(c_length)
if c_length <= 16:
blk = cipher
# print(original_vector)
a = AESE(original_vector, key, 10)
rblk = a.AesEncrypt()
for i in range(16):
xor_blk[i] = original_vector[i] ^ blk[i]
# print(xor_blk)
mText = ""
for x in range(16):
mText += chr(xor_blk[x])
plain += mText
else:
for group in range(0, c_length, 16):
blk = cipher[group:group + 16] # 原密文
# print(newblk)
a = AESE(original_vector, key, 10)
rblk = a.AesEncrypt() # 解密后密文
for i in range(16):
xor_blk[i] = rblk[i] ^ blk[i]
# print(original_vector)
mText = ""
for x in range(16):
mText += chr(xor_blk[x])
plain += mText
with codecs.open(r"aes解密OFB明文.txt",'w','utf-8') as f:
f.write(plain)
runTime = round(time.time() - stratTime, 2)
print("解密时长为%f" % runTime)
def main():
choice = '''
选择加密方式
(E)CB
(C)BC
(O)FB
(Q)uit
'''
while True:
your_choice = input(choice).lower()
if your_choice not in "ecqo":
print("你的输入不符合要求，请重新输入:")
continue
route = input("请输入要加密的文件路径")
skey = input("请输入加密秘钥")
if your_choice == 'e':
ECB(route,skey)
elif your_choice == 'c':
CBC(route,skey)
elif your_choice == 'o':
OFB(route,skey)
elif your_choice == 'q':
break
if __name__ == "__main__":
main()