Common Access Card

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Reason: A short general article about Smartcards (or Smartcard readers) is lacking. This article could become the foundation for it; the CAC relevant/specific content being moved to a section. Further related pcsc-tools exist (and contain supportability information), which can be helpful for identifying other smartcards.[1] (Discuss in Talk:Common Access Card#)

This page explains how to setup Arch to use a US Department of Defense Common Access Card (CAC).

Installation

Install ccid and opensc from official repositories.

There are two places in /etc/opensc.conf that comment out enable_pinpad = false. If your card reader does not have a pin pad, uncomment these lines.

Enable pcscd

Start and enable pcscd.service.

Configure browser

1. Go to: http://iase.disa.mil/pki-pke/Pages/tools.aspx

2. Download certs: "Trust Store" -> "PKI CA Certificate Bundles: PKCS#7" -> "For DoD PKI Only - Version 5.0" (ZIP Download)

3. Unzip the DoD PKI zip

4. Follow browser-specific instructions

Firefox

Load security device

Navigate to Edit -> Preference -> Advanced -> Certificates -> Security Devices and click "Load" to load a module using /usr/lib/opensc-pkcs11.so or /usr/lib/pkcs11/opensc-pkcs11.so.

Import the DoD Certificates

Install the certificates from the mentioned zip in _this_ order, by going to Edit -> Preference -> Advanced -> Certificates -> View Certificates -> Authorities -> Import (make sure to at-least check the box for "Trust this CA to identify websites"):

1. DoD_Root_CA_2__0x05__DoD_Root_CA_2.cer

2. DoD_Root_CA_2__0x05__DoD_Root_CA_3.cer

3. DoD_Root_CA_2__0x05__DoD_Root_CA_4.cer

4. Certificates_PKCS7_v5.0u1_DoD.der.p7b

Chromium/Google Chrome

1. Ensure CAC is connected, Chromium is closed and enter the following in a terminal: $ modutil -dbdir sql:.pki/nssdb/ -add "CAC Module" -libfile /usr/lib/opensc-pkcs11.so

2. Navigate (in a shell) to the location of the unzip DoD PKI files and install via:

 for n in $(ls * | grep Chrome); do certutil -d sql:$HOME/.pki/nssdb -A -t TC -n $n -i $n; done

Testing

Visit your favorite CAC secured web page and you should be asked for the Master Password for your certificate. Enter it and if you get in, you know it's working.

If some sites/pages seem to have a problem working correctly (e.g. outlook web access won't authenticate the session for DoD webmail) try using a private/incognito session to test validity of the cert chain and remove some variables.

Debugging

The pcsc-tools package is also availabe in [community]. The program pcsc_scan may be helpful

[cceleri@ender ~]$ pcsc_scan 
PC/SC device scanner
V 1.4.21 (c) 2001-2011, Ludovic Rousseau <ludovic.rousseau@free.fr>
Compiled with PC/SC lite version: 1.8.6
Using reader plug'n play mechanism
Scanning present readers...
0: Dell Dell Smart Card Reader Keyboard 00 00
Thu Sep  5 10:41:53 2013
Reader 0: Dell Dell Smart Card Reader Keyboard 00 00
  Card state: Card removed, 
Thu Sep  5 10:41:58 2013
Reader 0: Dell Dell Smart Card Reader Keyboard 00 00
  Card state: Card inserted, 
  ATR: 3B DB 96 00 80 1F 03 00 31 C0 64 B0 F3 10 00 07 90 00 80
ATR: 3B DB 96 00 80 1F 03 00 31 C0 64 B0 F3 10 00 07 90 00 80
+ TS = 3B --> Direct Convention
+ T0 = DB, Y(1): 1101, K: 11 (historical bytes)
  TA(1) = 96 --> Fi=512, Di=32, 16 cycles/ETU
    250000 bits/s at 4 MHz, fMax for Fi = 5 MHz => 312500 bits/s
  TC(1) = 00 --> Extra guard time: 0
  TD(1) = 80 --> Y(i+1) = 1000, Protocol T = 0 
-----
  TD(2) = 1F --> Y(i+1) = 0001, Protocol T = 15 - Global interface bytes following 
-----
  TA(3) = 03 --> Clock stop: not supported - Class accepted by the card: (3G) A 5V B 3V 
+ Historical bytes: 00 31 C0 64 B0 F3 10 00 07 90 00
  Category indicator byte: 00 (compact TLV data object)
    Tag: 3, len: 1 (card service data byte)
      Card service data byte: C0
        - Application selection: by full DF name
        - Application selection: by partial DF name
        - EF.DIR and EF.ATR access services: by GET RECORD(s) command
        - Card with MF
    Tag: 6, len: 4 (pre-issuing data)
     Data: B0 F3 10 00
    Mandatory status indicator (3 last bytes)
      LCS (life card cycle): 07 (Operational state (activated))
      SW: 9000 (Normal processing.)
+ TCK = 80 (correct checksum)
Possibly identified card (using /usr/share/pcsc/smartcard_list.txt):
3B DB 96 00 80 1F 03 00 31 C0 64 B0 F3 10 00 07 90 00 80
	DoD CAC, Oberthur ID One 128 v5.5 Dual