Computing & Communications Center
Network Operations

Expired Certificates

Why does my certificate expire?

In order to maintain the security and integrity of the WPI Network, all user certificates generated by WPI-Wireless-Setup (CloudPath) expire twelve months after being issued. Computers which are members of the WPI ADMIN domain expire on a different cycle.

How do I check my certificate on Windows Vista/7/8?

To determine the expiration date of your WPI Wireless Certificate, please follow these steps. Click on the images for larger version.

  1. If you are using Windows Vista/7, click the Start Menu orb, type in mmc.exe, and press Enter. If you are using Windows 8, type mmc.exe on the Start Screen and click on the icon labelled "mmc" that will appear.
       
  2. A window labelled "Console Root" will appear. Click on "File", and choose "Add/Remove Snap-ins".
  3. A new window will appear. Click on "Certificates" in the left pane, and then click the "Add" button located in the middle of the window.
  4. A box will appear, choose the "My user account" option and click Finish. Then click OK on the Add or Remove Snap-ins window.
  5. In the Console Root window on the left pane, click on the arrow to the left of "Certificates – Current User" to expand the list, and then click the arrow to the left of "Personal" located directly beneath.
  6. Underneath "Personal", click on "Certificates" (see location 1 in the image below). You should now see an entry on the list labelled "WPI NetOps Wireless CA" and its expiration date listed on the center pane. (see location 2 in the image below) Note that there may be other entries on this list so you may need to scroll down to find the WPI certificate.

How do I check my certificate on Macintosh OS X?

To determine the expiration date of your WPI Wireless Certificate, please follow these steps. Click on the images for larger version.

  1. Click on the spotlight in the upper right-hand corner of the screen and type in "keychain" and click on "Keychain Access".
  2. When the Keychain Access window opens, you should see the entry "iPhone Configuration" and its expiration date to the right. Note that you may need to scroll down to locate the entry on the list.

How do I check my certificate on an Apple iPhone, iPad or iPod?

To determine the expiration date of your WPI Wireless Certificate, please follow these steps. Click on the images for larger version.

  1. Tap "Settings" on your home screen.
  2. Tap "General" in the Settings menu.
  3. Scroll down and tap "Profile" in the General menu.
  4. Tap "More Details".
  5. The expiration date will be visible under the certificate labelled with your WPI email address.

How do I check my certificate on various version of Linux?

To determine the expiration date of your WPI Wireless Certificate requires a two step process: the P12 file needs to be converted to a x509 file, than the resulting file can be queried. Click on the images for larger version.

  1. Locate your wireless certificate and use the following command:
    openssl pkcs12 -in MyWirelessCertificate.p12 -out MyCert.pem
  2. You will need to provide the password in which the original P12 file was encrypted. For sake of speed, you do not need to provide a new PEM pass phrase.
  3. Once converted, use the following command:
    openssl x509 -in MyCert.pem -noout -endate
  4. If you opted to not use a password, delete the MyCert.pem file which does not have a password on it.

How do I check my certificate on Android powered devices?

Unfortunately, there is no method of checking the expiration date of a user certificate on an Android powered device.

Maintained by webmaster@wpi.edu
Last modified: May 19, 2014, 16:26 EDT
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