C/C++ 使用 cryptopp 加密解密

CryptLib 是新西兰奥克兰大学的Peter Gutmann先生花费了将近五年时间开发而成的一个加密安全工具包，它基于传统的计算机安全模型,并涉及到一个安全核心，各种抽象化了的对象位于核心之上。CRYPTLIB利用此加密库不同层次的接口,可以很容易地为各种应用系统提供安全服务,如加/解密、数字签名、认证等。

Github地址：https://github.com/LYingSiMon/cryptopp

引入cryptlib.lib以及所有项目中的头文件，并验证AES加密测试（ECB 模式为例）

#include <iostream>
 
#include "cryptlib.h"
#include "rijndael.h"
#include "modes.h"
#include "files.h"
#include "osrng.h"
#include "hex.h"
#include "base64.h"
 
using namespace CryptoPP;
 
// aes ebc 加密（输出 base64）
std::string aes_encrypt_ecb_base64(std::string data , unsigned char* key, int keylen)
{
    std::string encrypt_str;
 
    try 
    {
        CryptoPP::ECB_Mode<CryptoPP::AES>::Encryption ecb_encription(key, keylen);
        CryptoPP::StreamTransformationFilter stf_encription(
            ecb_encription,
            new CryptoPP::Base64Encoder(new CryptoPP::StringSink(encrypt_str)),
            CryptoPP::BlockPaddingSchemeDef::ZEROS_PADDING
        );
        stf_encription.Put(reinterpret_cast<const unsigned char*>(data.c_str()), data.length() + 1);
        stf_encription.MessageEnd();
    }
    catch (std::exception e) {
        std::cout << e.what() << std::endl;
    }
 
    return encrypt_str;
}
 
// aes ebc 加密（输出 hex） 
std::string aes_encrypt_ecb_hex(std::string data , unsigned char* key, int keylen)
{
    std::string encrypt_str;
 
    try 
    {
        CryptoPP::ECB_Mode<CryptoPP::AES>::Encryption ecb_encription(key, keylen);
        CryptoPP::StreamTransformationFilter stf_encription(
            ecb_encription,
            new CryptoPP::HexEncoder(new CryptoPP::StringSink(encrypt_str)),
            CryptoPP::BlockPaddingSchemeDef::ZEROS_PADDING
        );
        stf_encription.Put(reinterpret_cast<const unsigned char*>(data.c_str()), data.length() + 1);
        stf_encription.MessageEnd();
    }
    catch (std::exception e) {
        std::cout << e.what() << std::endl;
    }
 
    return encrypt_str;
}
 
// aes ebc 解密（输出 base64）
std::string aes_decrypt_ecb_base64(std::string base64_data, unsigned char* key, int keylen)
{
    try 
    {
        std::string aes_encrypt_data;
        CryptoPP::Base64Decoder decoder;
        decoder.Attach(new CryptoPP::StringSink(aes_encrypt_data));
        decoder.Put(reinterpret_cast<const unsigned char*>(base64_data.c_str()), base64_data.length());
        decoder.MessageEnd();
 
        std::string decrypt_data;
        CryptoPP::ECB_Mode<CryptoPP::AES>::Decryption ebc_description(key, keylen);
        CryptoPP::StreamTransformationFilter stf_description(
            ebc_description,
            new CryptoPP::StringSink(decrypt_data), 
            CryptoPP::BlockPaddingSchemeDef::ZEROS_PADDING
        );
 
        stf_description.Put(
            reinterpret_cast<const unsigned char*>(aes_encrypt_data.c_str()), 
            aes_encrypt_data.length()
        );
        stf_description.MessageEnd();
 
        return decrypt_data;
    }
    catch (std::exception e) {
        std::cout << e.what() << std::endl;
        return "";
    }
}
 
// aes ebc 解密（输出 hex）
std::string aes_decrypt_ecb_hex(std::string hex_data, unsigned char* key, int keylen)
{
    try
    {
        std::string aes_encrypt_data;
        CryptoPP::HexDecoder decoder;
        decoder.Attach(new CryptoPP::StringSink(aes_encrypt_data));
        decoder.Put(reinterpret_cast<const unsigned char*>(hex_data.c_str()), hex_data.length());
        decoder.MessageEnd();
 
        std::string decrypt_data;
        CryptoPP::ECB_Mode<CryptoPP::AES>::Decryption ebc_description(key, keylen);
        CryptoPP::StreamTransformationFilter stf_description(
            ebc_description,
            new CryptoPP::StringSink(decrypt_data),
            CryptoPP::BlockPaddingSchemeDef::ZEROS_PADDING
        );
 
        stf_description.Put(
            reinterpret_cast<const unsigned char*>(aes_encrypt_data.c_str()),
            aes_encrypt_data.length()
        );
        stf_description.MessageEnd();
 
        return decrypt_data;
    }
    catch (std::exception e) {
        std::cout << e.what() << std::endl;
        return "";
    }
}
 
 
int main()
{
    // ebc base64 
    std::string en_base64 = aes_encrypt_ecb_base64("hello cryptopp",(unsigned char*)"1234567812345678", 16);
    printf("en:%s \n", en_base64.c_str());
    std::string de_base64 = aes_decrypt_ecb_base64(en_base64, (unsigned char*)"1234567812345678", 16);
    printf("de:%s \n", de_base64.c_str());
 
    // ebc hex
    std::string en_hex = aes_encrypt_ecb_hex("hello cryptopp", (unsigned char*)"1234567812345678", 16);
    printf("en:%s \n", en_hex.c_str());
    std::string de_hex = aes_decrypt_ecb_hex(en_hex, (unsigned char*)"1234567812345678", 16);
    printf("de:%s \n", de_hex.c_str());
    
 
 
    (void)getchar();
    return 0;
}