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gnu: linux-pam: Add declarative PAM service interface.

* gnu/packages/linux.scm (<pam-service>, <pam-entry>): New record
  types.
  (pam-service->configuration, pam-services->directory,
  unix-pam-service): New procedures.
  (%pam-other-services): New variable.
gn-latest-20200428
Ludovic Courtès 8 years ago
parent
commit
c84d0eca05
1 changed files with 127 additions and 1 deletions
  1. +127
    -1
      gnu/packages/linux.scm

+ 127
- 1
gnu/packages/linux.scm View File

@ -32,7 +32,18 @@
#:use-module (gnu packages algebra)
#:use-module (guix packages)
#:use-module (guix download)
#:use-module (guix build-system gnu))
#:use-module (guix build-system gnu)
#:use-module (guix store)
#:use-module (guix derivations)
#:use-module (guix records)
#:use-module (srfi srfi-1)
#:use-module (srfi srfi-26)
#:use-module (ice-9 match)
#:export (pam-service
pam-entry
pam-services->directory
%pam-other-services
unix-pam-service))
(define-public (system->linux-architecture arch)
"Return the Linux architecture name for ARCH, a Guix system name such as
@ -214,6 +225,11 @@
(license gpl2)
(home-page "http://www.gnu.org/software/linux-libre/"))))
;;;
;;; Pluggable authentication modules (PAM).
;;;
(define-public linux-pam
(package
(name "linux-pam")
@ -255,6 +271,116 @@ be used through the PAM API to perform tasks, like authenticating a user
at login. Local and dynamic reconfiguration are its key features")
(license bsd-3)))
;; PAM services (see
;; <http://www.linux-pam.org/Linux-PAM-html/sag-configuration-file.html>.)
(define-record-type* <pam-service> pam-service
make-pam-service
pam-service?
(name pam-service-name) ; string
;; The four "management groups".
(account pam-service-account ; list of <pam-entry>
(default '()))
(auth pam-service-auth
(default '()))
(password pam-service-password
(default '()))
(session pam-service-session
(default '())))
(define-record-type* <pam-entry> pam-entry
make-pam-entry
pam-entry?
(control pam-entry-control) ; string
(module pam-entry-module) ; file name
(arguments pam-entry-arguments ; list of strings
(default '())))
(define (pam-service->configuration service)
"Return the configuration string for SERVICE, to be dumped in
/etc/pam.d/NAME, where NAME is the name of SERVICE."
(define (entry->string type entry)
(match entry
(($ <pam-entry> control module (arguments ...))
(string-append type " "
control " " module " "
(string-join arguments)
"\n"))))
(match service
(($ <pam-service> name account auth password session)
(string-concatenate
(append (map (cut entry->string "account" <>) account)
(map (cut entry->string "auth" <>) auth)
(map (cut entry->string "password" <>) password)
(map (cut entry->string "session" <>) session))))))
(define (pam-services->directory store services)
"Return the derivation to build the configuration directory to be used as
/etc/pam.d for SERVICES."
(let ((names (map pam-service-name services))
(files (map (match-lambda
((and service ($ <pam-service> name))
(let ((config (pam-service->configuration service)))
(add-text-to-store store
(string-append name ".pam")
config '()))))
services)))
(define builder
'(begin
(use-modules (ice-9 match))
(let ((out (assoc-ref %outputs "out")))
(mkdir out)
(for-each (match-lambda
((name . file)
(symlink file (string-append out "/" name))))
%build-inputs)
#t)))
(build-expression->derivation store "pam.d" (%current-system)
builder
(zip names files))))
(define %pam-other-services
;; The "other" PAM configuration, which denies everything (see
;; <http://www.linux-pam.org/Linux-PAM-html/sag-configuration-example.html>.)
(let ((deny (pam-entry
(control "required")
(module "pam_deny.so"))))
(pam-service
(name "other")
(account (list deny))
(auth (list deny))
(password (list deny))
(session (list deny)))))
(define unix-pam-service
(let ((unix (pam-entry
(control "required")
(module "pam_unix.so"))))
(lambda* (name #:key allow-empty-passwords?)
"Return a standard Unix-style PAM service for NAME. When
ALLOW-EMPTY-PASSWORDS? is true, allow empty passwords."
;; See <http://www.linux-pam.org/Linux-PAM-html/sag-configuration-example.html>.
(let ((name* name))
(pam-service
(name name*)
(account (list unix))
(auth (list (if allow-empty-passwords?
(pam-entry
(control "required")
(module "pam_unix.so")
(arguments '("nullok")))
unix)))
(password (list unix))
(session (list unix)))))))
;;;
;;; Miscellaneous.
;;;
(define-public psmisc
(package
(name "psmisc")


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