Crypto++ AES 加密解密流程

版本号

Crypto++  8.5

编译工具

msvc 2017 64bit

编译注意事项

生成动态库时，需要注意base64加解密源文件加入以及类的导出标志

 

 

使用注意事项

使用时，需要加入宏定义  CRYPTOPP_IMPORTS，否则链接错误

 

 

 

 

 

类封装参考

h文件

#ifndef XCRYPTO_H
#define XCRYPTO_H

#include <QObject>

typedef std::string strbase64;

class  XCrypto
{
public:
    XCrypto();

    virtual~ XCrypto();

    //in:string  out:base64 string
    strbase64 encrypt(std::string plain);

    std::string decrypt(strbase64 str);

private:
    unsigned char ucKey[16];
    unsigned char ucIV[16];
};

#endif // XCRYPTO_H

 

cpp文件

#include "xcrypto.h"
#include <aes.h>
#include <filters.h>
#include <modes.h>
#include <base64.h>

using namespace CryptoPP;

XCrypto::XCrypto()
{
    memcpy(ucKey, "1234567890123456", 16);
    memcpy(ucIV, "1234567890123456", 16);
}

XCrypto::~XCrypto()
{

}

strbase64 XCrypto::encrypt(std::string plain)
{
    CBC_Mode< AES >::Encryption e;
    e.SetKeyWithIV(ucKey, sizeof(ucKey), ucIV);
    StreamTransformationFilter stf(e, nullptr);
    for(int i = 0; i < plain.size(); i++){
        stf.Put((byte)plain[i]);
    }
    stf.MessageEnd();
    size_t ready = stf.MaxRetrievable();
    std::string cipher(ready, 0);
    stf.Get((byte*)&cipher[0], ready);

    Base64Encoder b64e;
    b64e.Put((byte*)cipher.c_str(), cipher.size());
    b64e.MessageEnd();
    ready = b64e.MaxRetrievable();
    strbase64 res(ready, 0);
    b64e.Get((byte*)&res[0], ready);
    return res;
}

std::string XCrypto::decrypt(strbase64 str)
{
    Base64Decoder b64d;
    b64d.Put((byte*)str.c_str(), str.size());
    b64d.MessageEnd();
    size_t ready = b64d.MaxRetrievable();
    std::string sby(ready, 0);
    b64d.Get((byte*)&sby[0], ready);

    CBC_Mode<AES>::Decryption d;
    d.SetKeyWithIV(ucKey, sizeof(ucKey), ucIV);

    StreamTransformationFilter stfd(d, nullptr);
    for(int i = 0; i < sby.size(); i++){
        stfd.Put((byte)sby[i]);
    }
    stfd.MessageEnd();
    ready = stfd.MaxRetrievable();
    std::string res(ready, 0);
    stfd.Get((byte*)&res[0], ready);
    return res;
}

#include "xcrypto.h"
#include <aes.h>
#include <filters.h>
#include <modes.h>
#include <base64.h>

using namespace CryptoPP;

XCrypto::XCrypto()
{
    memcpy(ucKey, "1234567890123456", 16);
    memcpy(ucIV, "1234567890123456", 16);
}

XCrypto::~XCrypto()
{

}

strbase64 XCrypto::encrypt(std::string plain)
{
    CBC_Mode< AES >::Encryption e;
    e.SetKeyWithIV(ucKey, sizeof(ucKey), ucIV);
    StreamTransformationFilter stf(e, nullptr);
    for(int i = 0; i < plain.size(); i++){
        stf.Put((byte)plain[i]);
    }
    stf.MessageEnd();
    size_t ready = stf.MaxRetrievable();
    std::string cipher(ready, 0);
    stf.Get((byte*)&cipher[0], ready);

    Base64Encoder b64e;
    b64e.Put((byte*)cipher.c_str(), cipher.size());
    b64e.MessageEnd();
    ready = b64e.MaxRetrievable();
    strbase64 res(ready, 0);
    b64e.Get((byte*)&res[0], ready);
    return res;
}

std::string XCrypto::decrypt(strbase64 str)
{
    Base64Decoder b64d;
    b64d.Put((byte*)str.c_str(), str.size());
    b64d.MessageEnd();
    size_t ready = b64d.MaxRetrievable();
    std::string sby(ready, 0);
    b64d.Get((byte*)&sby[0], ready);

    CBC_Mode<AES>::Decryption d;
    d.SetKeyWithIV(ucKey, sizeof(ucKey), ucIV);

    StreamTransformationFilter stfd(d, nullptr);
    for(int i = 0; i < sby.size(); i++){
        stfd.Put((byte)sby[i]);
    }
    stfd.MessageEnd();
    ready = stfd.MaxRetrievable();
    std::string res(ready, 0);
    stfd.Get((byte*)&res[0], ready);
    return res;
}