You cannot iterate through the certificates in the Credential Providers.

For windows Smartcard login implementation, requires Smart Card or Virtual Smart Card (TPM).

• enable the TPM module on the windows machine.

  • NOTE the PIN

• Import the certificate in the Newly created TPM module.

  • provide PIN while importing

• Identify the Key Container of the certificate imported.

• Use Provider as "Microsoft Base Smart Card Crypto Provider"

• Use this information to login.