I'm trying to implement 802.1x using EAP-TLS to authenticate our wireless users/clients (Windows 7 computers). I did a fair amount of research on how to implement this solution and everything seems to work fine when authentication mode is set to: Computer Authentication. However, when authentication mode is set to "User or Computer" or just "User" it fails. I get a "certificate is required to connect" pop up and it's unable to connect.
No errors on the NPS side but I enabled logging on the client (netsh ras set tracing * ENABLED) and this is what I can see. It seems as if there is a problem with the client certificate:
[236] 06-04 09:26:35:704: EAP-TLS using All-purpose cert
[236] 06-04 09:26:35:720: Self Signed Certificates will not be selected.
[236] 06-04 09:26:35:720: EAP-TLS will accept the All-purpose cert
[236] 06-04 09:26:35:720: EapTlsInitialize2: PEAP using All-purpose cert
[236] 06-04 09:26:35:720: PEAP will accept the All-purpose cert
[236] 06-04 09:26:35:720: EapTlsInvokeIdentityUI
[236] 06-04 09:26:35:720: GetCertInfo flags: 0x40082
[236] 06-04 09:26:35:720: FCheckUsage: All-Purpose: 1
[236] 06-04 09:26:35:720: DwGetEKUUsage
[236] 06-04 09:26:35:720: Number of EKUs on the cert are 3
[236] 06-04 09:26:35:720: FCheckSCardCertAndCanOpenSilentContext
[236] 06-04 09:26:35:720: DwGetEKUUsage
[236] 06-04 09:26:35:720: Number of EKUs on the cert are 3
[236] 06-04 09:26:35:720: FCheckUsage: All-Purpose: 1
[236] 06-04 09:26:35:720: Acquiring Context for Container Name: le-8021xUsers-84adbdd0-a706-4c71-b74a-61a1bd702839, ProvName: Microsoft Software Key Storage Provider, ProvType 0x0
[236] 06-04 09:26:35:720: CryptAcquireContext failed. This CSP cannot be opened in silent mode. skipping cert.Err: 0x80090014
[236] 06-04 09:26:35:720: FCheckUsage: All-Purpose: 1
[236] 06-04 09:26:35:720: DwGetEKUUsage
[236] 06-04 09:26:35:720: Number of EKUs on the cert are 1
[236] 06-04 09:26:35:720: No Certs were found in the Certificate Store. (A cert was needed for the following purpose: UserAuth) Aborting search for certificates.
Also, in the event viewer I get the following:
Wireless 802.1x authentication failed.
Network Adapter: Dell Wireless 1510 Wireless-N WLAN Mini-Card
Interface GUID: {64191d46-0ea6-4251-86bb-7d6de5701025}
Local MAC Address: C4:17:FE:48:F2:79
Network SSID: *****
BSS Type: Infrastructure
Peer MAC Address: 00:12:17:01:F7:2F
Identity: NULL
User: presentation
Domain: ****
Reason: Explicit Eap failure received
Error: 0x80420014
EAP Reason: 0x80420100
EAP Root cause String: Network authentication failed\nThe user certificate required for the network can't be found on this computer.
I created user and computer certificates by duplicating the "User" and "Computer" templates in AD CS. I modified the "Subject Name" to "Build from Active Directory information". "Subject Name Format" is set to "Fully Distinguished Name" and "User Principal Name (UPN) is checked. All other boxes are cleared. I verified that certificates for both user, computer , and root CA are all correctly auto enrolled. I also verified that the user certificate exists in the "Personal" user certificate store on the client.
There is clearly something wrong with the user certificate but what? I'm at wits ends as I have tried everything. Please help!