不同类型文件加密的优秀Python库
创始人
2025-01-09 09:00:16
0

以下是一些优秀的Python库,用于不同类型文件加密,并包含代码示例:

  1. 对称加密:

    • PyCrypto:是一个流行的加密库,提供了对称加密算法(如AES、DES等)的实现。
    from Crypto.Cipher import AES
    
    def encrypt_file_symmetric(key, in_filename, out_filename=None, chunksize=64*1024):
        if not out_filename:
            out_filename = in_filename + ".enc"
        encryptor = AES.new(key, AES.MODE_EAX)
    
        with open(in_filename, 'rb') as infile:
            with open(out_filename, 'wb') as outfile:
                outfile.write(encryptor.nonce)
                chunk = infile.read(chunksize)
                while len(chunk) > 0:
                    encrypted_chunk = encryptor.encrypt(chunk)
                    outfile.write(encrypted_chunk)
                    chunk = infile.read(chunksize)
    
    def decrypt_file_symmetric(key, in_filename, out_filename=None, chunksize=64*1024):
        if not out_filename:
            out_filename = in_filename[:-4]
        with open(in_filename, 'rb') as infile:
            nonce = infile.read(16)
            decryptor = AES.new(key, AES.MODE_EAX, nonce)
            with open(out_filename, 'wb') as outfile:
                chunk = infile.read(chunksize)
                while len(chunk) > 0:
                    decrypted_chunk = decryptor.decrypt(chunk)
                    outfile.write(decrypted_chunk)
                    chunk = infile.read(chunksize)
    
  2. 非对称加密:

    • cryptography:是一个功能强大的加密库,提供了非对称加密算法(如RSA、ECC等)的实现。
    from cryptography.fernet import Fernet
    
    def generate_key():
        key = Fernet.generate_key()
        with open("key.txt", 'wb') as key_file:
            key_file.write(key)
    
    def encrypt_file_asymmetric(public_key_file, in_filename, out_filename=None, chunksize=64*1024):
        if not out_filename:
            out_filename = in_filename + ".enc"
        with open(public_key_file, 'rb') as key_file:
            public_key = key_file.read()
            key = Fernet(public_key)
            with open(in_filename, 'rb') as infile:
                with open(out_filename, 'wb') as outfile:
                    chunk = infile.read(chunksize)
                    while len(chunk) > 0:
                        encrypted_chunk = key.encrypt(chunk)
                        outfile.write(encrypted_chunk)
                        chunk = infile.read(chunksize)
    
    def decrypt_file_asymmetric(private_key_file, in_filename, out_filename=None, chunksize=64*1024):
        if not out_filename:
            out_filename = in_filename[:-4]
        with open(private_key_file, 'rb') as key_file:
            private_key = key_file.read()
            key = Fernet(private_key)
            with open(in_filename, 'rb') as infile:
                chunk = infile.read(chunksize)
                with open(out_filename, 'wb') as outfile:
                    while len(chunk) > 0:
                        decrypted_chunk = key.decrypt(chunk)
                        outfile.write(decrypted_chunk)
                        chunk = infile.read(chunksize)
    
  3. 文件压缩和加密:

    • pyminizip:是一个Python库,可以将文件压缩并使用密码进行加密。
    import pyminizip
    
    def compress_encrypt_file(in_filename, out_filename, password):
        pyminizip.compress(in_filename, None, out_filename, password, 5)
    
    def decompress_decrypt_file(in_filename, out_filename, password):
        pyminizip.uncompress(in_filename, password, ".", out_filename)
    

这些库提供了不同类型文件加密的解决方案,可以根据需求选择适合的库和算法进行文件加密和解密操作。

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