OpenSSL非对称加密RSA应用——Windows版本_rsa解密openssl有windows版吗-优快云博客

本文链接：https://blog.youkuaiyun.com/gaoli8393/article/details/51897281

本文介绍如何使用OpenSSL库实现RSA密钥的生成、读取及数据的加密和解密过程，并提供了一个C++示例程序，演示了不同方式下（如从内存或文件读取密钥）的操作流程。

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1.openssl源码

ftp://ftp.openssl.org/source/

2.openssl命令

openssl genrsa -out prikey.pem 1024

openssl rsa -in privkey.pem -pubout -out pubkey.pem

3.openssl c++应用实例

#include <iostream>
#include <string>
using namespace std;

#include "OpenSSLRSA.h"

int _tmain(int argc, _TCHAR* argv[])
{
COpenSSLRSA osrsa;

osrsa.m_sText = "123abcd我没啥地方法规ldjf464";

osrsa.m_sPubKeyFile = "public.pem";
osrsa.m_sPriKeyFile = "private.pem";
//strcpy(osrsa.m_sPriKeyPwd, "1234");

int nState = 1;

switch(nState)
{
case 1:
{
// 1.从内存中读取秘钥
osrsa.BuildKey();

if(!osrsa.ReadPubRSAByMem())
return -1;
if(!osrsa.ReadPriRSAByMem())
return -1;
}
break;
case 2:
{
// 2.直接产生秘钥对
osrsa.BuildKey();
}
break;
case 3:
{
// 3.从文件中读取秘钥
osrsa.BuildKey();

if(!osrsa.ReadPubRSAByFile())
return -1;
if(!osrsa.ReadPriRSAByFile())
return -1;
}
break;
default:
break;
}

cout << "-----原文: " << osrsa.m_sText << endl << endl;

//密文（二进制数据）
//string two = osrsa.EncodeRSAPubKeyData();
string two = osrsa.EncodeRSAPriKeyData();

int len1 = osrsa.m_sPubKey.length();
int len2 = osrsa.m_sPriKey.length();
int len3 = osrsa.m_sText.length();
int len4 = osrsa.m_sCryptText.length();

if(two.length() <= 0)
return 0;

cout << "-----密文: " << two << endl << endl;

//顺利的话，解密后的文字和原文是一致的
//string three = osrsa.DecodeRSAPriKeyData();
string three = osrsa.DecodeRSAPubKeyData();

if(three.length() <= 0)
return 0;

cout << "-----译文: " << three << endl << endl;

cout<<"公钥长度 = "<<len1<<endl;
cout<<"私钥长度 = "<<len2<<endl;
cout<<"原文长度 = "<<len3<<endl;
cout<<"密文长度 = "<<len4<<endl;
cout<<endl;

return 0;
}