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利用openssl的代码mini ca 实现证书的办法与管理

mso-char-indent-size:10.5pt'><span style='font-family:宋体;mso-ascii-font-family:
"Times New Roman";mso-hansi-font-family:"Times New Roman"'>程序是在一个电子钥匙管理程序的基础上作的，原来电子钥匙的部分还保留着，需要电子钥匙的支持。</span></p>

<p class=MsoNormal style='text-indent:21.0pt;mso-char-indent-count:2.0;
mso-char-indent-size:10.5pt'><span style='font-family:宋体;mso-ascii-font-family:
"Times New Roman";mso-hansi-font-family:"Times New Roman"'>代码较多，笔者只介绍认为重要的三点。</span></p>

<p class=MsoNormal style='text-indent:21.0pt;mso-char-indent-count:2.0;
mso-char-indent-size:10.5pt'><span style='font-family:宋体;mso-ascii-font-family:
"Times New Roman";mso-hansi-font-family:"Times New Roman"'>程序要点：</span></p>

<p class=MsoNormal style='text-indent:21.1pt;mso-char-indent-count:2.0;
mso-char-indent-size:10.55pt'><b><span style='font-family:宋体;mso-ascii-font-family:
"Times New Roman";mso-hansi-font-family:"Times New Roman"'>（</span><span
lang=EN-US>1</span></b><b><span style='font-family:宋体;mso-ascii-font-family:
"Times New Roman";mso-hansi-font-family:"Times New Roman"'>）</span></b><span
lang=EN-US>RA</span><span style='font-family:宋体;mso-ascii-font-family:"Times New Roman";
mso-hansi-font-family:"Times New Roman"'>客户端与服务器程序采用了</span><span lang=EN-US>ACCESS</span><span
style='font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:
"Times New Roman"'>数据库，</span><span lang=EN-US>SSL</span><span
style='font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:
"Times New Roman"'>连接、非阻塞套接字，基本原理是客户端发送命令请求，服务器查询数据库，然后查询结果发给客户端。非阻塞套接字是很灵活的，运用不当会事倍功半，这个程序而言：</span><span
lang=EN-US>AsyncSelect</span><span style='font-family:宋体;mso-ascii-font-family:
"Times New Roman";mso-hansi-font-family:"Times New Roman"'>函数是个关键。</span></p>

<p class=MsoNormal><span style='mso-bidi-font-size:10.0pt;font-family:宋体;
mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman"'>林军鼐的</span><span
lang=EN-US>Winsock</span><span style='font-family:宋体;mso-ascii-font-family:
"Times New Roman";mso-hansi-font-family:"Times New Roman"'>编程宝典中这样写道：</span></p>

<p class=MsoNormal><span style='mso-bidi-font-size:10.5pt;font-family:宋体;
mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman"'>【</span><span
lang=EN-US style='mso-bidi-font-size:10.5pt'>FD_WRITE </span><span
style='mso-bidi-font-size:10.5pt;font-family:宋体;mso-ascii-font-family:"Times New Roman";
mso-hansi-font-family:"Times New Roman"'>事件】</span><span lang=EN-US
style='mso-bidi-font-size:10.5pt'> <br>
</span><span style='mso-bidi-font-size:10.5pt;font-family:宋体;mso-ascii-font-family:
"Times New Roman";mso-hansi-font-family:"Times New Roman"'>系统会通知我们</span><span
lang=EN-US style='mso-bidi-font-size:10.5pt'> FD_WRITE </span><span
style='mso-bidi-font-size:10.5pt;font-family:宋体;mso-ascii-font-family:"Times New Roman";
mso-hansi-font-family:"Times New Roman"'>事件的讯息，只有下列几种情况：</span><span
lang=EN-US style='mso-bidi-font-size:10.5pt'> <br>
</span><span style='mso-bidi-font-size:10.5pt;font-family:宋体;mso-ascii-font-family:
"Times New Roman";mso-hansi-font-family:"Times New Roman"'>（</span><span
lang=EN-US style='mso-bidi-font-size:10.5pt'>1</span><span style='mso-bidi-font-size:
10.5pt;font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:
"Times New Roman"'>）呼叫</span><span lang=EN-US style='mso-bidi-font-size:10.5pt'>
WSAAsyncSelect() </span><span style='mso-bidi-font-size:10.5pt;font-family:
宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman"'>来设定</span><span
lang=EN-US style='mso-bidi-font-size:10.5pt'> FD_WRITE </span><span
style='mso-bidi-font-size:10.5pt;font-family:宋体;mso-ascii-font-family:"Times New Roman";
mso-hansi-font-family:"Times New Roman"'>事件时，</span><span lang=EN-US
style='mso-bidi-font-size:10.5pt'>Socket </span><span style='mso-bidi-font-size:
10.5pt;font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:
"Times New Roman"'>已经可以传送资料（</span><span lang=EN-US style='mso-bidi-font-size:
10.5pt'>TCP scoket </span><span style='mso-bidi-font-size:10.5pt;font-family:
宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman"'>已经和对方连接成功了，或</span><span
lang=EN-US style='mso-bidi-font-size:10.5pt'> UDP socket </span><span
style='mso-bidi-font-size:10.5pt;font-family:宋体;mso-ascii-font-family:"Times New Roman";
mso-hansi-font-family:"Times New Roman"'>已建立完成），且目前</span><span lang=EN-US
style='mso-bidi-font-size:10.5pt'> output buffer </span><span style='mso-bidi-font-size:
10.5pt;font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:
"Times New Roman"'>仍有空间可写入资料。</span><span lang=EN-US style='mso-bidi-font-size:
10.5pt'><o:p></o:p></span></p>

<p class=MsoNormal><span style='mso-bidi-font-size:10.5pt;font-family:宋体;
mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman"'>（</span><span
lang=EN-US style='mso-bidi-font-size:10.5pt'>2</span><span style='mso-bidi-font-size:
10.5pt;font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:
"Times New Roman"'>）呼叫</span><span lang=EN-US style='mso-bidi-font-size:10.5pt'>
WSAAsyncSelect() </span><span style='mso-bidi-font-size:10.5pt;font-family:
宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman"'>来设定</span><span
lang=EN-US style='mso-bidi-font-size:10.5pt'> FD_WRITE </span><span
style='mso-bidi-font-size:10.5pt;font-family:宋体;mso-ascii-font-family:"Times New Roman";
mso-hansi-font-family:"Times New Roman"'>事件时，</span><span lang=EN-US
style='mso-bidi-font-size:10.5pt'>Socket </span><span style='mso-bidi-font-size:
10.5pt;font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:
"Times New Roman"'>尚不能传送资料，不过一旦</span><span lang=EN-US style='mso-bidi-font-size:
10.5pt'> Socket </span><span style='mso-bidi-font-size:10.5pt;font-family:宋体;
mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman"'>与对方连接成功，马上就会收到</span><span
lang=EN-US style='mso-bidi-font-size:10.5pt'> FD_WRITE </span><span
style='mso-bidi-font-size:10.5pt;font-family:宋体;mso-ascii-font-family:"Times New Roman";
mso-hansi-font-family:"Times New Roman"'>的通知。</span><span lang=EN-US
style='mso-bidi-font-size:10.5pt'> <br>
</span><span style='mso-bidi-font-size:10.5pt;font-family:宋体;mso-ascii-font-family:
"Times New Roman";mso-hansi-font-family:"Times New Roman"'>（</span><span
lang=EN-US style='mso-bidi-font-size:10.5pt'>3</span><span style='mso-bidi-font-size:
10.5pt;font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:
"Times New Roman"'>）呼叫</span><span lang=EN-US style='mso-bidi-font-size:10.5pt'>
send() </span><span style='mso-bidi-font-size:10.5pt;font-family:宋体;mso-ascii-font-family:
"Times New Roman";mso-hansi-font-family:"Times New Roman"'>或</span><span
lang=EN-US style='mso-bidi-font-size:10.5pt'> sendto() </span><span
style='mso-bidi-font-size:10.5pt;font-family:宋体;mso-ascii-font-family:"Times New Roman";
mso-hansi-font-family:"Times New Roman"'>传送资料时，系统告知错误，且错误码为</span><span
lang=EN-US style='mso-bidi-font-size:10.5pt'>10035 WSAEWOULDBLOCK </span><span
style='mso-bidi-font-size:10.5pt;font-family:宋体;mso-ascii-font-family:"Times New Roman";
mso-hansi-font-family:"Times New Roman"'>（呼叫</span><span lang=EN-US
style='mso-bidi-font-size:10.5pt'> WSAGetLastError() </span><span
style='mso-bidi-font-size:10.5pt;font-family:宋体;mso-ascii-font-family:"Times New Roman";
mso-hansi-font-family:"Times New Roman"'>得知这项错误），这时表示</span><span lang=EN-US
style='mso-bidi-font-size:10.5pt'> output buffer </span><span style='mso-bidi-font-size:
10.5pt;font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:
"Times New Roman"'>已经满了，无法再写入任何资料（此时即令呼叫再多次的</span><span lang=EN-US
style='mso-bidi-font-size:10.5pt'> send() </span><span style='mso-bidi-font-size:
10.5pt;font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:
"Times New Roman"'>也都一定失败）；一旦系统将部份资料成功送抵对方，空出</span><span lang=EN-US
style='mso-bidi-font-size:10.5pt'> output buffer </span><span style='mso-bidi-font-size:
10.5pt;font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:
"Times New Roman"'>後，便会送一个</span><span lang=EN-US style='mso-bidi-font-size:
10.5pt'> FD_WRITE </span><span style='mso-bidi-font-size:10.5pt;font-family:
宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman"'>给使用者，告知可继续传送资料了。换句话说，读者在呼叫</span><span
lang=EN-US style='mso-bidi-font-size:10.5pt'> send() </span><span
style='mso-bidi-font-size:10.5pt;font-family:宋体;mso-ascii-font-family:"Times New Roman";
mso-hansi-font-family:"Times New Roman"'>传送资料时，只要不是返回错误</span><span lang=EN-US
style='mso-bidi-font-size:10.5pt'> 10035 </span><span style='mso-bidi-font-size:
10.5pt;font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:
"Times New Roman"'>的话，便可一直继续呼叫</span><span lang=EN-US style='mso-bidi-font-size:
10.5pt'> send() </span><span style='mso-bidi-font-size:10.5pt;font-family:宋体;
mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman"'>来传送资料；一旦</span><span
lang=EN-US style='mso-bidi-font-size:10.5pt'> send() </span><span
style='mso-bidi-font-size:10.5pt;font-family:宋体;mso-ascii-font-family:"Times New Roman";
mso-hansi-font-family:"Times New Roman"'>回返错误</span><span lang=EN-US
style='mso-bidi-font-size:10.5pt'> 10035</span><span style='mso-bidi-font-size:
10.5pt;font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:
"Times New Roman"'>，那麽便不要再呼叫</span><span lang=EN-US style='mso-bidi-font-size:
10.5pt'> send() </span><span style='mso-bidi-font-size:10.5pt;font-family:宋体;
mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman"'>传送资料，而须等收到</span><span
lang=EN-US style='mso-bidi-font-size:10.5pt'> FD_WRITE </span><span
style='mso-bidi-font-size:10.5pt;font-family:宋体;mso-ascii-font-family:"Times New Roman";
mso-hansi-font-family:"Times New Roman"'>後，再继续传送资料。</span><span lang=EN-US
style='mso-bidi-font-size:10.5pt'><o:p></o:p></span></p>

<p class=MsoNormal><span style='mso-bidi-font-size:10.5pt;font-family:宋体;
mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman"'>【</span><span
lang=EN-US style='mso-bidi-font-size:10.5pt'>FD_READ </span><span
style='mso-bidi-font-size:10.5pt;font-family:宋体;mso-ascii-font-family:"Times New Roman";
mso-hansi-font-family:"Times New Roman"'>事件】</span><span lang=EN-US
style='mso-bidi-font-size:10.5pt'> <br>
</span><span style='mso-bidi-font-size:10.5pt;font-family:宋体;mso-ascii-font-family:
"Times New Roman";mso-hansi-font-family:"Times New Roman"'>我们会收到</span><span
lang=EN-US style='mso-bidi-font-size:10.5pt'> FD_READ </span><span
style='mso-bidi-font-size:10.5pt;font-family:宋体;mso-ascii-font-family:"Times New Roman";
mso-hansi-font-family:"Times New Roman"'>事件通知我们去读取资料的情况有</span><span
style='mso-bidi-font-size:10.5pt'> </span><span style='mso-bidi-font-size:10.5pt;
font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:
"Times New Roman"'>：</span><span lang=EN-US style='mso-bidi-font-size:10.5pt'> <br>
</span><span style='mso-bidi-font-size:10.5pt;font-family:宋体;mso-ascii-font-family:
"Times New Roman";mso-hansi-font-family:"Times New Roman"'>（</span><span
lang=EN-US style='mso-bidi-font-size:10.5pt'>1</span><span style='mso-bidi-font-size:
10.5pt;font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:
"Times New Roman"'>）呼叫</span><span lang=EN-US style='mso-bidi-font-size:10.5pt'>
WSAAsyncSelect </span><span style='mso-bidi-font-size:10.5pt;font-family:宋体;
mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:"Times New Roman"'>函式来对此</span><span
lang=EN-US style='mso-bidi-font-size:10.5pt'> Socket </span><span
style='mso-bidi-font-size:10.5pt;font-family:宋体;mso-ascii-font-family:"Times New Roman";
mso-hansi-font-family:"Times New Roman"'>设定</span><span lang=EN-US
style='mso-bidi-font-size:10.5pt'> FD_READ </span><span style='mso-bidi-font-size:
10.5pt;font-family:宋体;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family:
"Times New Roman"'>事件时，</span><span lang=EN-US style='mso-bidi-font-size:10.5pt'>input