How to use smartcards with OpenSSH?
OpenSSH contains experimental support for authentication using
-Cyberflex smartcards and TODOS card readers. To enable this you
+Cyberflex smartcards and TODOS card readers, in addition to the cards
+with PKCS#15 structure supported by OpenSC. To enable this you
need to:
-(1) enable SMARTCARD support in OpenSSH:
+Using libsectok:
- $ ./configure --with-smartcard [...]
- and rebuild
+(1) enable sectok support in OpenSSH:
+
+ $ ./configure --with-sectok
(2) If you have used a previous version of ssh with your card, you
must remove the old applet and keys.
sectok> login -d
sectok> jload /usr/libdata/ssh/Ssh.bin
sectok> setpass
- Enter new AUT0 passphrase:
- Re-enter passphrase:
+ Enter new AUT0 passphrase:
+ Re-enter passphrase:
sectok> quit
Do not forget the passphrase. There is no way to
In spite of the name, this does not generate a key.
It just loads an already existing key on to the card.
-(5) tell the ssh client to use the card reader:
-
- $ ssh -I 1 otherhost
-
-(6) or tell the agent (don't forget to restart) to use the smartcard:
-
- $ ssh-add -s 1
-
-(7) Optional: If you don't want to use a card passphrase, change the
+(5) Optional: If you don't want to use a card passphrase, change the
acl on the private key file:
$ sectok
sectok> login -d
- sectok> acl 0012 world: w
- world: w
- AUT0: w inval
+ sectok> acl 0012 world: w
+ world: w
+ AUT0: w inval
sectok> quit
If you do this, anyone who has access to your card
can assume your identity. This is not recommended.
+
+Using OpenSC:
+
+(1) install OpenSC:
+
+ Sources and instructions are available from
+ http://www.opensc.org/
+
+(2) enable OpenSC support in OpenSSH:
+
+ $ ./configure --with-opensc[=/path/to/opensc] [options]
+
+(3) load a RSA key to the card:
+
+ Not supported yet.
+
+
+Common operations:
+
+(1) tell the ssh client to use the card reader:
+
+ $ ssh -I 1 otherhost
+
+(2) or tell the agent (don't forget to restart) to use the smartcard:
+
+ $ ssh-add -s 1
+
+
-markus,
Tue Jul 17 23:54:51 CEST 2001
-$OpenBSD: README.smartcard,v 1.8 2002/03/26 18:56:23 rees Exp $
+$OpenBSD: README.smartcard,v 1.9 2003/11/21 11:57:02 djm Exp $