python以太网加密解密
时间: 2023-11-11 08:00:50 浏览: 83
Python加密与解密
Python本身并不提供以太网加密解密的功能,但可以使用第三方库来实现。其中比较常用的是pycryptodome和cryptography库。
使用pycryptodome库进行以太网加密解密的示例代码如下:
```python
from Crypto.Cipher import AES
# 加密
def encrypt(key, plaintext):
cipher = AES.new(key, AES.MODE_EAX)
ciphertext, tag = cipher.encrypt_and_digest(plaintext.encode())
return ciphertext, cipher.nonce, tag
# 解密
def decrypt(key, nonce, ciphertext, tag):
cipher = AES.new(key, AES.MODE_EAX, nonce=nonce)
plaintext = cipher.decrypt_and_verify(ciphertext, tag)
return plaintext.decode()
```
其中,key为加密密钥,plaintext为明文,ciphertext为密文,nonce为随机数,tag为认证标签。
使用cryptography库进行以太网加密解密的示例代码如下:
```python
from cryptography.hazmat.primitives.ciphers import Cipher, algorithms, modes
from cryptography.hazmat.primitives import padding
# 加密
def encrypt(key, plaintext):
iv = os.urandom(16)
cipher = Cipher(algorithms.AES(key), modes.CBC(iv))
encryptor = cipher.encryptor()
padder = padding.PKCS7(128).padder()
padded_plaintext = padder.update(plaintext.encode()) + padder.finalize()
ciphertext = encryptor.update(padded_plaintext) + encryptor.finalize()
return ciphertext, iv
# 解密
def decrypt(key, iv, ciphertext):
cipher = Cipher(algorithms.AES(key), modes.CBC(iv))
decryptor = cipher.decryptor()
padded_plaintext = decryptor.update(ciphertext) + decryptor.finalize()
unpadder = padding.PKCS7(128).unpadder()
plaintext = unpadder.update(padded_plaintext) + unpadder.finalize()
return plaintext.decode()
```
其中,key为加密密钥,plaintext为明文,ciphertext为密文,iv为初始化向量。
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