前提準備條件

• 需要安裝openssl
• 需要安裝openssl-dev
• 需要配置CMakeLists.txt文件
• 集體內(nèi)容可以參考我提供的相關(guān)參考鏈接

AES_file.h

#include <openssl/aes.h> #include <iostream> #include <fstream> #include <cstring>#define RELEASE_ARRAY(P) if (P) \ { \delete[] P; \P = NULL; \ }class AES{ public:// AES文件加密函數(shù) ///int TestAesEncryptFile(std::string original_backup_file_path, std::string backup_dir_path, std::string &password){int encrypt_chunk_size = 16;std::ifstream original_backup_file(original_backup_file_path.c_str(), std::ios::binary);std::ofstream backup_dir(backup_dir_path, std::ios::binary);if (!original_backup_file){std::cout << "Can not open original_backup_file file." << std::endl;return 1;}if (!backup_dir){std::cout << "Can not open backup_dir_path file." << std::endl;return 1;}//用指定密鑰對一段內(nèi)存進行加密，結(jié)果放在outbuffer中unsigned char aes_keybuf[32];memset(aes_keybuf, 0, sizeof(aes_keybuf));strcpy((char *)aes_keybuf, password.c_str());AES_KEY aeskey;AES_set_encrypt_key(aes_keybuf, 256, &aeskey);char *in_data = new char[encrypt_chunk_size + 1];char *out_data = new char[encrypt_chunk_size + 1];while (!original_backup_file.eof()){original_backup_file.read(in_data, encrypt_chunk_size);if (original_backup_file.gcount() < encrypt_chunk_size){backup_dir.write(in_data, original_backup_file.gcount());}else{AES_encrypt((const unsigned char *)in_data, (unsigned char *)out_data, &aeskey);backup_dir.write(out_data, original_backup_file.gcount());}};backup_dir.close();original_backup_file.close();RELEASE_ARRAY(in_data);RELEASE_ARRAY(out_data);return 0;}// AES文件解密函數(shù) //int TestAesDecryptFile(std::string in_file_path, std::string out_file_path, std::string &password){int encrypt_chunk_size = 16;std::ifstream original_backup_file(in_file_path.c_str(), std::ios::binary);std::ofstream backup_dir(out_file_path, std::ios::binary);if (!original_backup_file){std::cout << "Can not open original_backup_file file." << std::endl;return 1;}if (!backup_dir){std::cout << "Can not open backup_dir file." << std::endl;return 1;}//用指定密鑰對一段內(nèi)存進行加密，結(jié)果放在outbuffer中unsigned char aes_keybuf[32];memset(aes_keybuf, 0, sizeof(aes_keybuf));strcpy((char *)aes_keybuf, password.c_str());AES_KEY aeskey;AES_set_decrypt_key(aes_keybuf, 256, &aeskey);char *in_data = new char[encrypt_chunk_size + 1];char *out_data = new char[encrypt_chunk_size + 1];while (!original_backup_file.eof()){original_backup_file.read(in_data, encrypt_chunk_size);if (original_backup_file.gcount() < encrypt_chunk_size){backup_dir.write(in_data, original_backup_file.gcount());}else{AES_decrypt((unsigned char *)in_data, (unsigned char *)out_data, &aeskey);backup_dir.write(out_data, original_backup_file.gcount());}};backup_dir.close();original_backup_file.close();RELEASE_ARRAY(in_data);RELEASE_ARRAY(out_data);return 0;} };

main.cpp

#include <iostream> #include "load_or_save_db.h" #include "include/AES_file.h"int main() {time_t t1, t2, t3, t4;t1 = time(nullptr);printf("加解密起始時間： %s\n", ctime(&t1));std::string password = "xcdf123456";AES aes;// 數(shù)據(jù)開始加密aes.TestAesEncryptFile("/home/gsc/Projects/1.txt", "/home/gsc/Projects/2.txt", password);t2 = time(nullptr);printf("AES256加密成功!\n");printf("加密用時: %ld秒\n", (t2 - t1));t3 = time(NULL);// 數(shù)據(jù)開始解密aes.TestAesDecryptFile("/home/gsc/Projects/2.txt", "/home/gsc/Projects/3.txt", password);t4 = time(NULL);printf("AES256解密成功!\n");printf("解密用時: %lld秒\n", (t4 - t3));return 0; }

參考鏈接

• C++: 基于OpenSSL的AES256加解密測試
• clion中鏈接openssl庫

總結(jié)

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