OPENSSL如何加载电子证书

2009-05-20 09:13:29 200 阅读 AI 写同款 · GEO 优化AI 选题数据监测一键分发 ›

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小弟目前正在学习OPENSSL,在摸索中有以下一点疑问,请大家赐教
OPENSSL的Demo 中关于SSL通讯的例子是这么写的(客户端程序)



ssl = SSL_new (ctx);                        CHK_NULL(ssl);    

  SSL_set_fd (ssl, sd); 

  err = SSL_connect (ssl);                    CHK_SSL(err); 

    

  /* Following two steps are optional and not required for 

    data exchange to be successful. */ 

  

  /* Get the cipher - opt */ 



  printf ("SSL connection using %s\n", SSL_get_cipher (ssl)); 

  

  /* Get server's certificate (note: beware of dynamic allocation) - opt */ 



  server_cert = SSL_get_peer_certificate (ssl);    



  CHK_NULL(server_cert); 

  printf ("Server certificate:\n"); 

  

  str = X509_NAME_oneline (X509_get_subject_name (server_cert),0,0); 

  CHK_NULL(str); 

  printf ("\t subject: %s\n", str); 

  OPENSSL_free (str); 



  str = X509_NAME_oneline (X509_get_issuer_name  (server_cert),0,0); 

  CHK_NULL(str); 

  printf ("\t issuer: %s\n", str); 

  OPENSSL_free (str); 



  /* We could do all sorts of certificate verification stuff here before 

    deallocating the certificate. */ 



  X509_free (server_cert); 

  

  /* --------------------------------------------------- */ 

  /* DATA EXCHANGE - Send a message and receive a reply. */ 



  err = SSL_write (ssl, "Hello World!", strlen("Hello World!"));  CHK_SSL(err); 

  

  err = SSL_read (ssl, buf, sizeof(buf) - 1);                    CHK_SSL(err); 

  buf[err] = '\0'; 

  printf ("Got %d chars:'%s'\n", err, buf); 

  SSL_shutdown (ssl);  /* send SSL/TLS close_notify */ 



  /* Clean up. */ 



  closesocket(sd); 

  SSL_free (ssl); 

  SSL_CTX_free (ctx);