在Debian系统中,readdir是用于读取目录内容的系统调用。如果你想要对通过readdir读取的数据进行加密,你需要在应用程序层面实现加密逻辑,而不是在系统调用层面。以下是一些实现数据加密的方法:

安装OpenSSL库:
sudo apt-get updatesudo apt-get install libssl-dev编写加密程序:使用C语言编写一个程序,利用OpenSSL库对读取的目录内容进行加密。以下是一个简单的示例:
#include <stdio.h>#include <stdlib.h>#include <string.h>#include <dirent.h>#include <openssl/aes.h>#include <openssl/rand.h>void encrypt_data(const char *input, unsigned char *key, unsigned char *iv, unsigned char *output) {AES_KEY enc_key;AES_set_encrypt_key(key, 256, &enc_key);AES_cbc_encrypt((unsigned char *)input, output, strlen(input), &enc_key, iv, AES_ENCRYPT);}int main() {const char *dir_path = "/path/to/directory";DIR *dir = opendir(dir_path);if (!dir) {perror("opendir");return EXIT_FAILURE;}struct dirent *entry;while ((entry = readdir(dir)) != NULL) {if (strcmp(entry->d_name, ".") == 0 || strcmp(entry->d_name, "..") == 0) {continue;}// 假设我们有一个固定的密钥和IVunsigned char key[32] = "0123456789abcdef0123456789abcdef";unsigned char iv[AES_BLOCK_SIZE] = {0};// 加密文件名unsigned char encrypted_name[strlen(entry->d_name) + AES_BLOCK_SIZE];encrypt_data(entry->d_name, key, iv, encrypted_name);printf("Encrypted file name: ");for (int i = 0; i < strlen(entry->d_name) + AES_BLOCK_SIZE; i++) {printf("%02x", encrypted_name[i]);}printf("n");}closedir(dir);return EXIT_SUCCESS;}编译程序:
gcc -o encrypt_readdir encrypt_readdir.c -lcrypto运行程序:
./encrypt_readdir如果你更喜欢使用Python,可以使用cryptography库来实现加密。
安装cryptography库:
pip install cryptography编写加密脚本:
from cryptography.hazmat.primitives.ciphers import Cipher, algorithms, modesfrom cryptography.hazmat.backends import default_backendimport osimport direntdef encrypt_data(data, key, iv):cipher = Cipher(algorithms.AES(key), modes.CBC(iv), backend=default_backend())encryptor = cipher.encryptor()padder = padding.PKCS7(algorithms.AES.block_size).padder()padded_data = padder.update(data) + padder.finalize()return encryptor.update(padded_data) + encryptor.finalize()key = os.urandom(32)iv = os.urandom(16)dir_path = "/path/to/directory"with os.scandir(dir_path) as it:for entry in it:if entry.name.startswith('.'):continueencrypted_name = encrypt_data(entry.name.encode(), key, iv)print(f"Encrypted file name: {encrypted_name.hex()}")运行脚本:
python encrypt_readdir.py通过上述方法,你可以在Debian系统中实现对readdir读取的数据进行加密。