gnuk/doc/gnuk-personalization.rst

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2012-08-03 01:53:04 +00:00
=============================
Personalization of Gnuk Token
=============================
Personalize your Gnuk Token
===========================
Invoke GnuPG with the option ``--card-edit``. ::
$ gpg --card-edit
gpg: detected reader `FSIJ Gnuk (0.12-34006E06) 00 00'
Application ID ...: D276000124010200F517000000010000
Version ..........: 2.0
Manufacturer .....: FSIJ
Serial number ....: 00000001
Name of cardholder: [not set]
Language prefs ...: [not set]
Sex ..............: unspecified
URL of public key : [not set]
Login data .......: [not set]
Signature PIN ....: forced
Key attributes ...: 2048R 2048R 2048R
Max. PIN lengths .: 127 127 127
PIN retry counter : 3 3 3
Signature counter : 0
Signature key ....: [none]
Encryption key....: [none]
Authentication key: [none]
General key info..: [none]
It shows the status of the card (as same as the output of ``gpg --card-status``). It shows token's name and its USB serial string (0.12-34006E06) from PC/SC-lite.
Then, GnuPG enters its own command interaction mode. The prompt is ``gpg/card>``.
In the OpenPGPcard specification, there are two passwords: one is
user-password and another is admin-password. In the specification,
user-password is refered as PW1, and admin-password is refered as PW3.
Note that people sometimes use different words than "password" to
refer same thing, in GnuPG and its applications. For example, the
output explained above includes the word "PIN" (Personal
Identification Number), and the helper program for input is named
"pinentry". Note that it is OK (and recommended) to include
characters other than digits for the case of OpenPGPcard.
Besides, some people sometimes prefer the word "passphrase" to
"password", as it can encourage to have longer string, but it means
same thing and it just refer user-password or admin-password.
Firstly, I change PIN of card user from factory setting (of "123456"). Note that, by only changing user's PIN, it enables "admin less mode" of Gnuk. "Admin less mode" means that admin password will become same one of user's. That is, PW1 = PW3. Note that *the length of PIN should be more than (or equals to) 8* for "admin less mode". ::
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gpg/card> passwd
gpg: OpenPGP card no. D276000124010200F517000000010000 detected
Please enter the PIN
Enter PIN: 123456
New PIN
Enter New PIN: <PASSWORD-OF-GNUK>
New PIN
Repeat this PIN: <PASSWORD-OF-GNUK>
PIN changed.
The "admin less mode" is Gnuk only feature, not defined in the
OpenPGPcard specification. By using "admin less mode", there will be
only a sigle password to memorize, and it will be easier if a token
is used by an individual.
(If you want normal way ("admin full mode" in Gnuk's term), that is, user-password *and* admin-password independently, please change admin-password at first. Then, the token works as same as OpenPGPcard specification with regards to PW1 and PW3.)
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Secondly, enabling admin command, I put name of mine. Note that I input user's PIN (which I set above) here, because it is "admin less mode". ::
gpg/card> admin
Admin commands are allowed
gpg/card> name
Cardholder's surname: Niibe
Cardholder's given name: Yutaka
gpg: 3 Admin PIN attempts remaining before card is permanently locked
Please enter the Admin PIN
Enter Admin PIN: <PASSWORD-OF-GNUK>
Thirdly, I put some other informations, such as language, sex, login, and URL. URL specifies the place where I put my public keys. ::
gpg/card> lang
Language preferences: ja
gpg/card> sex
Sex ((M)ale, (F)emale or space): m
gpg/card> url
URL to retrieve public key: http://www.gniibe.org/gniibe.asc
gpg/card> login
Login data (account name): gniibe
Since I don't force PIN input everytime, toggle it to non-force-pin-for-signature. ::
gpg/card> forcesig
Lastly, I setup reset code. This is optional. ::
gpg/card> passwd
gpg: OpenPGP card no. D276000124010200F517000000010000 detected
1 - change PIN
2 - unblock PIN
3 - change Admin PIN
4 - set the Reset Code
Q - quit
Your selection? 4
gpg: 3 Admin PIN attempts remaining before card is permanently locked
Please enter the Admin PIN
Enter Admin PIN: <PASSWORD-OF-GNUK>
New Reset Code
Enter New PIN: <RESETCODE-OF-GNUK>
New Reset Code
Repeat this PIN: <RESETCODE-OF-GNUK>
Reset Code set.
1 - change PIN
2 - unblock PIN
3 - change Admin PIN
4 - set the Reset Code
Q - quit
Your selection? q
Then, I quit. ::
gpg/card> quit
That's all.