Steve: First,thanks a lot, i need your help. I have written a ssl proxy to improve security, and now i have some problem: 1.I can only get site certification from IIS (apache build in modssl is ok) using X509_STORE_CTX_get_chain() in my verify_call which is a callback function used in SSL_CTX_set_verify, i think this is iis's characteristic, really? . 2. when he used my ssl proxy as his browser's ssl proxy, I want to display a popup listbox to let user select personal certificate when www site require personal certificate just like IE and Netscape, so i must have already got site's certify chain, i can't get it by using X509_STORE_CTX_get_chain() in my verify_call, it only return site certificate ,when site www server is iis, i can get root ca which signed this site certificate, but no site's certify chain which can let me choose my personal certificate. Thanks a lot. jasson zou 网易动画站带你走进神奇快乐的动画世界, 有电影、有游戏、还有MTV!千万别错过了! http://cartoon.163.com 我们正在进行FLASH游戏的征稿活动,静待高手的来临! ______________________________________________________________________ OpenSSL Project http://www.openssl.org Development Mailing List [EMAIL PROTECTED] Automated List Manager [EMAIL PROTECTED]