Question

我的服务器无法获得对等证书这适用于SSL_CTX_set_verify（ctx，SSL_VERIFY_PEER，0）;已移除添加它会导致客户端和服务器无法通信从服务器查询客户端证书总是给出NULL

以下是以下代码： - 头文件socket.h，用于服务器和客户端示例

#ifndef SOCKET_H
#define SOCKET_H

#include <sys/types.h>
#include <sys/socket.h>
#include <arpa/inet.h>
#include <unistd.h>
#include <set>

#include <openssl/ssl.h>
#include <openssl/err.h>
#include <thread>

int g_start=[]()->int{
        system("../Servercert.sh");  /*create the certificates*/
        SSL_load_error_strings(); /* load all error messages */
        SSL_library_init(); /* load & register all cryptos, etc for TLS 1.2. */
        return 0;
        }();  //initialize this for all who use TLS 1.2

/*---------------------------------------------------------------------*/
/*--- LoadCertificates - load from files.                           ---*/
/*---------------------------------------------------------------------*/
void LoadCertificates(SSL_CTX* ctx, char* CertFile, char* KeyFile)
{
    /* set the local certificate from CertFile */
    if ( SSL_CTX_use_certificate_file(ctx, CertFile, SSL_FILETYPE_PEM) <= 0 )
    {
        ERR_print_errors_fp(stderr);
        abort();
    }
    /* set the private key from KeyFile (may be the same as CertFile) */
    if ( SSL_CTX_use_PrivateKey_file(ctx, KeyFile, SSL_FILETYPE_PEM) <= 0 )
    {
        ERR_print_errors_fp(stderr);
        abort();
    }
    /* verify private key */
    if ( !SSL_CTX_check_private_key(ctx) )
    {
        fprintf(stderr, "Private key does not match the public certificate\n");
        abort();
    }
}

SSL_CTX* InitCTX(void)
{   const SSL_METHOD *method;
    SSL_CTX *ctx;

    method = SSLv23_method(); /* Create new client-method instance */
    ctx = SSL_CTX_new(method); /* Create new context */
    if ( ctx == NULL )
    {
        ERR_print_errors_fp(stderr);
        abort();
    }
    return ctx;
}


#endif // SOCKET_H

我的服务器源文件

#include <iostream>
using namespace std;

#include "socket.h"

SSL *socketsInListenMode(SSL_CTX * &ctx,int portno)
{
    ctx = InitCTX(); /* initialize SSL */
    LoadCertificates(ctx, "server.cert","server.key");
    SSL_CTX_set_verify(ctx,SSL_VERIFY_PEER,0);

    sockaddr_in serv_addr={},cli_addr={};
    int sockListenfd = socket(AF_INET, SOCK_STREAM, 0);

    serv_addr.sin_family = AF_INET;
    serv_addr.sin_addr.s_addr = INADDR_ANY;
    serv_addr.sin_port = htons(portno);

    int bindret=bind(sockListenfd, (struct sockaddr *) &serv_addr, sizeof(serv_addr));
    cout<<bindret<<endl;
    if(bindret < 0) return 0;

    listen(sockListenfd,10);

    socklen_t s=0;
    int newsockfd = accept(sockListenfd, (struct sockaddr *)&cli_addr, &s);

    SSL *ssl = SSL_new(ctx);         /* get new SSL state with context */
    SSL_set_fd(ssl, newsockfd); /* set connection socket to SSL state */
    SSL_accept(ssl);

    close( sockListenfd );
    sockListenfd = 0;   //this will cause Accept to return
    return ssl;
}

#include<string>
int main()
{
    SSL_CTX *ctx=0;
    SSL *ssl = socketsInListenMode(ctx,5000);

    string s="asif";
    SSL_write(ssl,s.c_str(),s.length());  //may no write the full string (but thats okay for our sample)

    close(SSL_get_fd(ssl));
    SSL_free(ssl);
    SSL_CTX_free(ctx);
    return 0;
}

我的客户端源文件

#include <iostream>
#include "../server/socket.h"

using namespace std;

int SocketConnect(int portno, string strIP)
{
    struct sockaddr_in serv_addr={};

    serv_addr.sin_family = AF_INET;
    serv_addr.sin_addr.s_addr = inet_addr(strIP.c_str());
    serv_addr.sin_port = htons(portno);

    int sockfd = socket(AF_INET, SOCK_STREAM, 0);
    int ret=connect(sockfd,(struct sockaddr *) &serv_addr, sizeof(serv_addr));
    if(-1 == ret)
    {
        return -1;
    }
    return sockfd;
}

SSL *secureConnect(SSL_CTX * &ctx,int portno, string strIP)
{
    ctx = InitCTX();

    LoadCertificates(ctx, "server.cert","server.key");
    SSL_CTX_set_verify(ctx,SSL_VERIFY_PEER,0);

    SSL *ssl = SSL_new(ctx); /* create new SSL connection state */

    int sfd=SocketConnect(portno,strIP);  //socketConnect

    if(-1 == sfd)
        return NULL;

    SSL_set_fd(ssl, sfd);
    SSL_connect(ssl);         //SSL connect

    return ssl;
}

int main()
{
    SSL_CTX *ctx=0;
    SSL *ssl = secureConnect(ctx,5000,"127.0.0.1");

    char buff[100]={};
    SSL_read(ssl,buff,sizeof(buff));
    cout<<buff<<endl<<flush;

    close(SSL_get_fd(ssl));
    SSL_free(ssl);
    SSL_CTX_free(ctx);
    return 0;
}

Answer 1

实际上，如果没有SSL_CTX_set_verify也不应该工作，因为在握手期间验证对等证书时未指定CA证书的位置，如果您使用了自签名证书可能会有效

您应该使用SSL_CTX_load_verify_locations来设置CA证书

openssl查询客户端证书

1 个答案: