Python对文件内容进行加密

有时候我们手中文件的内容十分的重要、十分地机密，我们可以选择对此进行加密，代码如下：

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from cryptography.fernet import Fernet


 


def encrypt(filename, key):


    fernet = Fernet(key)


    with open(filename, 'rb') as file:


        original = file.read()


    encrypted = fernet.encrypt(original)


    with open(filename, 'wb') as enc_file:


        enc_file.write(encrypted)


         


key = Fernet.generate_key()


filename = "file.txt"


encrypt(filename, key)

我们生成密钥，然后对文件内容进行加密，当然这个密钥后面在对文件进行解密的时候会派上用场，因此密钥一定要保存完好，解密的代码如下：

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def decrypt(filename, key):


    fernet = Fernet(key)


    with open(filename, 'rb') as enc_file:


        encrypted = enc_file.read()


    decrypted = fernet.decrypt(encrypted)


    with open(filename, 'wb') as dec_file:


        dec_file.write(decrypted)


 


decrypt(filename, key)

上面的脚本，其中的密钥是一个随机生成的随机数，当然密钥也可以是我们自己指定的，代码如下：

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import pyAesCrypt


 


def Encryption(input_file_path, output_file_path, key):


    pyAesCrypt.encryptFile(input_file_path, output_file_path, key)


    print("File has been decrypted")


 


def Decryption(input_file_path, output_file_path, key):


    pyAesCrypt.decryptFile(input_file_path, output_file_path, key)


    print("File has been decrypted")

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