AES.h头文件

#include <cstring>
#include <fstream>
#include <iostream>
#include <openssl/aes.h>//AES文件加密函数
int aes_encrypt_file(const std::string &original_backup_file_path,const std::string &encrypted_file_path,const std::string &password) {//创建 ass_key 对象AES_KEY aes_key{};AES_set_encrypt_key(reinterpret_cast<const uint8_t*>(password.c_str()), 256, &aes_key);//定义加密块的大小，必须是16字节int encrypt_chunk_size = 16;std::ifstream original_backup_file(original_backup_file_path,std::ios::binary);std::ofstream encrypted_file(encrypted_file_path, std::ios::binary);char aes_encrypt_in[encrypt_chunk_size + 1];char aes_encrypt_out[encrypt_chunk_size +1];while (!original_backup_file.eof()) {original_backup_file.read(aes_encrypt_in, encrypt_chunk_size);if (original_backup_file.gcount() < encrypt_chunk_size) {encrypted_file.write(aes_encrypt_in, original_backup_file.gcount());} else {AES_encrypt(reinterpret_cast<const unsigned char*>(aes_encrypt_in),reinterpret_cast<unsigned char*>(aes_encrypt_out),&aes_key);encrypted_file.write(aes_encrypt_out, original_backup_file.gcount());}};encrypted_file.close();original_backup_file.close();return 0;
}//AES文件解密函数
int aes_decrypt_file(const std::string &encrypted_file_path,const std::string &decrypted_file_path,const std::string &password) {AES_KEY aes_key{};AES_set_decrypt_key(reinterpret_cast<const uint8_t*>(password.c_str()), 256, &aes_key);int encrypt_chunk_size = 16;std::ifstream encrypted_file(encrypted_file_path, std::ios::binary);std::ofstream decrypted_file(decrypted_file_path, std::ios::binary);char aes_decrypt_in[encrypt_chunk_size + 1];char aes_decrypt_out[encrypt_chunk_size +1];while (!encrypted_file.eof()) {encrypted_file.read(aes_decrypt_in, encrypt_chunk_size);if (encrypted_file.gcount() < encrypt_chunk_size) {decrypted_file.write(aes_decrypt_in, encrypted_file.gcount());} else {AES_decrypt(reinterpret_cast<const unsigned char*>(aes_decrypt_in),reinterpret_cast<unsigned char*>(aes_decrypt_out),&aes_key);decrypted_file.write(aes_decrypt_out, encrypted_file.gcount());}};encrypted_file.close();decrypted_file.close();return 0;
}

main函数调用

#include "AES.h"int main(){//Test AES.h encstd::string enc_from = "/home/gsc/Projects/1.txt";std::string enc_to_dec_from = "/home/gsc/Projects/2.enc";std::string dec_to ="/home/gsc/Projects/3.txt";std::string password = "Cxt123456";aes_encrypt_file(enc_from,enc_to_dec_from,password);//Test AES.h decaes_decrypt_file(enc_to_dec_from,dec_to,password);
}