Apache 設定雙向 SSL 認證方式

• 需要自己產生免費 Server 憑證，請參考 OpenSSL 簽發憑證方式。
• 將產生的 ServerCA.crt, ServerCA.key, RootCA.crt 放入 /etc/pki/tls/certs/ 內

  cp ServerCA.crt /etc/pki/tls/certs/
  cp ServerCA.key /etc/pki/tls/certs/
  cp RootCA.crt /etc/pki/tls/certs/
  cd /etc/pki/tls/certs/
  chmod og-rwx ServerCA.crt
  chmod og-rwx ServerCA.key
  chmod og-rwx RootCA.crt

vi /etc/httpd/conf.d/ssl.conf

:
LoadModule ssl_module modules/mod_ssl.so
:
SSLMutex default
:
SSLCertificateFile /etc/pki/tls/certs/ServerCA.crt
SSLCertificateKeyFile /etc/pki/tls/certs/ServerCA.key
SSLCACertificateFile /etc/pki/tls/certs/RootCA.crt
:
SSLVerifyClient require
SSLVerifyDepth  1
:

openssl rsa -in /etc/pki/tls/certs/ServerCA.key -out /etc/pki/tls/certs/ServerCA.pem
Enter pass phrase for private/svncert.key:  <- 輸入 Pin Code
writing RSA key  <- 完成

vi /etc/httpd/conf.d/ssl.conf

:
SSLCertificateKeyFile /etc/pki/tls/certs/ServerCA.pem
:

1. 可以在 ssl.conf 內增加以下參數

   :
   SSLCARevocationFile /etc/pki/tls/crl/ca-bundle-client.crl
   :

2. 下載 crl 檔加入 /etc/pki/tls/crl/ca-bundle-client.crl, 以下以 OpenSSL 廢止憑證方式 內的 trysoft.crl 當範例

   openssl crl -inform PEM -in trysoft.crl -text -CAfile /etc/pki/tls/certs/RootCA.crt > CRL.pem
   cat CRL.pem >> /etc/pki/tls/crl/ca-bundle-client.crl

3. 更改 ssl.conf 要重新啟動 Apache 才會生效, 以下是使用已經廢止的 ClientCA 憑證連線錯誤訊息

   [jonathan@pd920 certs]$ curl --cert ClientCA.pem https://mail.ichiayi.com/t.txt
   Enter PEM pass phrase:
   curl: (35) error:14094414:SSL routines:SSL3_READ_BYTES:sslv3 alert certificate revoked

service httpd restart

• http://chinaunix.net/jh/13/523585.html
• http://curl.haxx.se/docs/sslcerts.html
• http://httpd.apache.org/docs/2.2/mod/mod_ssl.html#ssloptions
• http://polinwei.blogspot.com/2009/02/linux-centos-apache-server-with-ssl.html (啟動 httpd 不需輸入 server.key 密碼方式)