Notes on OpenSC PAM integration

Hi,


upon advice I bought a Feitian A22 Java card. I managed to get it to 
work with PAM integration and wanted to share my notes on the procedure 
as a lot of the information was scattered around or using a previous 
version of OpenSSL; eventually I used about 20 or more? different sites 
to figure out the below.


Maybe it could be put onto a Wiki somewhere? It is working on Arch Linux 
and a Lenovo P15 notebook with SmartCard Reader option installed.



INSTALL
-------

INSTALL IsoApplet TO CARD AND GENERATE PUBLIC KEY:

java -jar /usr/share/java/globalplatformpro/gp.jar -info
java -jar /usr/share/java/globalplatformpro/gp.jar -list
cd IsoApplet/
java -jar /usr/share/java/globalplatformpro/gp.jar -install IsoApplet.cap
java -jar /usr/share/java/globalplatformpro/gp.jar -list
pcsc_scan
pkcs15-init --generate-key "rsa/2048" --auth-id "FF" --label "myKey" 
--id "1" --key-usage digitalSignature,keyAgreement,keyEncipherment
pkcs15-tool --dump
pkcs15-tool --read-public-key "01" --output "publicKey.pem"

pkcs11-tool -O
pkcs11-tool -M


OpenSSL /etc/ssl/openssl.cnf ->

ADD TO TOP:

# Note that you can include other files from the main configuration
# file using the .include directive.
#.include filename

openssl_conf = openssl_init

# This definition stops the following lines choking if HOME isn't
# defined.
HOME            = .


ADD TO BOTTOM:

[engine_section]
pkcs11 = pkcs11_section

[pkcs11_section]
engine_id = pkcs11
dynamic_path = /usr/lib/engines-1.1/libpkcs11.so
MODULE_PATH = opensc-pkcs11.so
init = 0


CHECK ENGINE AVAILABILITY:

openssl engine pkcs11 -t

(pkcs11) pkcs11 engine
      [ available ]


GENERATE PRIVATE KEY:

p11tool --provider /usr/lib/opensc-pkcs11.so --login --generate-rsa 
--bits 2048 --label $USER
p11tool --provider /usr/lib/opensc-pkcs11.so --list-privkeys --login


GENERATE CERTIFICATE:

req -engine pkcs11 -new -key 
"pkcs11:object=myKey;type=private;pin-value=0000" -keyform engine -out 
req.pem -text -x509 -subj "/CN=$USER"


STORE CERTIFICATE TO CARD AND COPY TO /etc/pam_pkcs11/cacerts:

pkcs15-init --store-certificate cert.pem --id 1 --cert-label "$USER"

cp /path/to/cert.pem /etc/pam_pkcs11/cacerts/
pkcs11_make_hash_link


VERIFY INFORMATION ON CARD:

pkcs15-tool --list-keys
pkcs15-tool -D
pkcs11_listcerts
pkcs15-tool -c
pkcs11-tool --list-token-slots
pkcs11-tool --test --login --token-label "JavaCard isoApplet (User PIN)"


PAM_PKCS11 /etc/pam_pkcs11/pam_pkcs11.conf ->

cp /usr/share/doc/pam_pkcs11/pam_pkcs11.conf.example 
/etc/pam_pkcs11/pam_pkcs11.conf

MODIFY:

cert_policy = none;

use_mappers = pwent


PAM MODULES:

/etc/pam.d/system-local-login ->

auth      sufficient /usr/lib/security/pam_pkcs11.so

/etc/pam.d/sudo ->

auth            sufficient     /usr/lib/security/pam_pkcs11.so


TEST:

sudo -i





I also plan into looking at what more the card can be used for such as 
email with pk12 , ssh , vpn and many more. Eventually I think I want to 
get PAM to function in a way that it requires a FaceID or fingerprint in 
addition to the card. Currently everything works fine individually but 
the trick will be to combine things - fprintd and Howdy.


Best Regards,


Kaya



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