AES加密方式有五种：ECB, CBC, CTR, CFB, OFB

从安全性角度推荐CBC加密方法，本文介绍了CBC,ECB两种加密方法的python实现

python 在 Windows下使用AES时要安装的是pycryptodome 模块

pip install pycryptodome

python 在 Linux下使用AES时要安装的是pycrypto模块

pip install pycrypto

CBC加密需要一个十六位的key(密钥)和一个十六位iv(偏移量)

ECB加密不需要iv

AES CBC 加密的python实现

from Crypto.Cipher import AES

from binascii import b2a_hex, a2b_hex

# 如果text不足16位的倍数就用空格补足为16位

def add_to_16(text):

if len(text.encode('utf-8')) % 16:

add = 16 - (len(text.encode('utf-8')) % 16)

else:

add = 0

text = text + ('\0' * add)

return text.encode('utf-8')

# 加密函数

def encrypt(text):

key = '9999999999999999'.encode('utf-8')

mode = AES.MODE_CBC

iv = b'qqqqqqqqqqqqqqqq'

text = add_to_16(text)

cryptos = AES.new(key, mode, iv)

cipher_text = cryptos.encrypt(text)

# 因为AES加密后的字符串不一定是ascii字符集的，输出保存可能存在问题，所以这里转为16进制字符串

return b2a_hex(cipher_text)

# 解密后，去掉补足的空格用strip() 去掉

def decrypt(text):

key = '9999999999999999'.encode('utf-8')

iv = b'qqqqqqqqqqqqqqqq'

mode = AES.MODE_CBC

cryptos = AES.new(key, mode, iv)

plain_text = cryptos.decrypt(a2b_hex(text))

return bytes.decode(plain_text).rstrip('\0')

if __name__ == '__main__':

e = encrypt("hello world") # 加密

d = decrypt(e) # 解密

print("加密:", e)

print("解密:", d)

AES ECB加密的python实现

"""

ECB没有偏移量

"""

from Crypto.Cipher import AES

from binascii import b2a_hex, a2b_hex

def add_to_16(text):

if len(text.encode('utf-8')) % 16:

add = 16 - (len(text.encode('utf-8')) % 16)

else:

add = 0

text = text + ('\0' * add)

return text.encode('utf-8')

# 加密函数

def encrypt(text):

key = '9999999999999999'.encode('utf-8')

mode = AES.MODE_ECB

text = add_to_16(text)

cryptos = AES.new(key, mode)

cipher_text = cryptos.encrypt(text)

return b2a_hex(cipher_text)

# 解密后，去掉补足的空格用strip() 去掉

def decrypt(text):

key = '9999999999999999'.encode('utf-8')

mode = AES.MODE_ECB

cryptor = AES.new(key, mode)

plain_text = cryptor.decrypt(a2b_hex(text))

return bytes.decode(plain_text).rstrip('\0')

if __name__ == '__main__':

e = encrypt("hello world") # 加密

d = decrypt(e) # 解密

print("加密:", e)

print("解密:", d)

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本文标题: python实现AES加密与解密

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