352 lines
17 KiB
Scheme
352 lines
17 KiB
Scheme
(define-module (metznet machines kerberos)
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#:use-module (srfi srfi-26)
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#:use-module (srfi srfi-9)
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#:use-module (srfi srfi-1)
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#:use-module (gnu system)
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#:use-module (guix gexp)
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#:use-module (guix packages)
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#:use-module (guix download)
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#:use-module (guix utils)
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#:use-module (guix build-system gnu)
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#:use-module ((guix licenses)
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#:prefix license:)
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#:use-module (metznet system base-system)
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#:use-module (gnu system shadow)
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#:use-module (gnu packages)
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#:use-module (gnu packages kerberos)
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#:use-module (gnu packages base)
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#:use-module (gnu packages admin)
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#:use-module (gnu packages tls)
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#:use-module (gnu packages bison)
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#:use-module (gnu packages perl)
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#:use-module (gnu packages tcl)
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#:use-module (gnu packages readline)
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#:use-module (gnu packages slapd)
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#:use-module (gnu services)
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#:use-module (gnu services shepherd)
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#:use-module (gnu services configuration)
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#:use-module (gnu services certbot)
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#:export (kerberos.metznet.ca kerberos-services))
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(define-public mit-krb5-ldap
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(package
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(name "mit-krb5-ldap")
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(version "1.20")
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(source
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(origin
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(method url-fetch)
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(uri (list (string-append "https://web.mit.edu/kerberos/dist/krb5/"
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(version-major+minor version) "/krb5-"
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version ".tar.gz")
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(string-append "https://kerberos.org/dist/krb5/"
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(version-major+minor version) "/krb5-"
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version ".tar.gz")))
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(patches (search-patches "mit-krb5-hurd.patch"))
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(sha256
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(base32 "0bz16sh0vgzlpy2kx5acmpyy181hl83a1alz7wbk06457kfjn0ky"))))
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(build-system gnu-build-system)
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(native-inputs (list bison perl tcl openldap-slapd)) ;required for some tests
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(inputs (list openssl readline))
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(arguments
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`( ;XXX: On 32-bit systems, 'kdb5_util' hangs on an fcntl/F_SETLKW call
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;; while running the tests in 'src/tests'. Also disable tests when
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;; cross-compiling.
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#:tests? ,(and (not (%current-target-system))
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(string=? (%current-system) "x86_64-linux"))
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,@(if (%current-target-system)
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'(#:configure-flags (list "--localstatedir=/var"
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"--with-readline"
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"--with-ldap"
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"krb5_cv_attr_constructor_destructor=yes"
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"ac_cv_func_regcomp=yes"
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"ac_cv_printf_positional=yes"
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"ac_cv_file__etc_environment=yes"
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"ac_cv_file__etc_TIMEZONE=no")
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#:make-flags (list "CFLAGS+=-DDESTRUCTOR_ATTR_WORKS=1"))
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'(#:configure-flags (list "--with-tls-impl=openssl"
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"--with-readline" "--with-ldap"
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"--localstatedir=/var")))
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#:phases (modify-phases %standard-phases
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(add-after 'unpack 'enter-source-directory
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(lambda _
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(chdir "src")))
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(add-before 'check 'pre-check
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(lambda* (#:key inputs native-inputs #:allow-other-keys)
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(let ((perl (search-input-file (or native-inputs inputs)
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"bin/perl")))
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(substitute* "plugins/kdb/db2/libdb2/test/run.test"
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(("/bin/cat")
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perl)
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(("D/bin/sh")
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(string-append "D"
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(which "sh")))
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(("bindir=/bin/.")
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(string-append "bindir="
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(dirname perl))))))))))
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(synopsis "MIT Kerberos 5")
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(description
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"Massachusetts Institute of Technology implementation of Kerberos.
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Kerberos is a network authentication protocol designed to provide strong
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authentication for client/server applications by using secret-key
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cryptography.")
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(license (license:non-copyleft "file://NOTICE"
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"See NOTICE in the distribution."))
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(home-page "https://web.mit.edu/kerberos/")
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(properties '((cpe-name . "kerberos")))))
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(define (serialize-field conv pad)
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(lambda (field-name value)
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#~(string-append #$pad
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#$(symbol->string field-name) " = "
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#$(conv value) "\n")))
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(define serialize-string
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(serialize-field (lambda (val)
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val) " "))
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(define-maybe string)
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(define list-of-ports?
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(list-of integer?))
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(define serialize-list-of-ports
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(serialize-field (lambda (val)
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(string-join (map number->string val) ",")) " "))
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(define realm-serialize-list-of-ports
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(serialize-field (lambda (val)
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(string-join (map number->string val) ",")) " "))
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(define-maybe list-of-ports)
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(define-maybe file-like)
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(define serialize-file-like
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(serialize-field (lambda (val)
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val) " "))
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(define (serialize-none field-name value)
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"")
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(define-configuration kdc-realm-configuration
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(name (string "EXAMPLE.COM") "realm name" serialize-none)
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(database_module maybe-string "database module")
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(acl_file maybe-file-like "acl file")
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(key_stash_file (string "/var/lib/kerberos/stash") "key stash file")
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(kdc_ports (list-of-ports '(750 88)) "list of ports to listen on"
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realm-serialize-list-of-ports)
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(kadmind_ports (list-of-ports '(749))
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"list of ports to listen on for kadmin connections"
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realm-serialize-list-of-ports)
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(max_life (string "10h 0m 0s") "maximum life of granted tickets")
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(max_renewable_type (string "7d 0h 0m 0s") "maximum time to renew ticket")
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(master_key_type (string "des3-hmac-sha1") "master key type")
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(supported_enctypes maybe-string "supported encryption types")
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(default_principal_flags maybe-string "default flag for new principals"))
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(define list-of-kdc-realm-configuration?
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(list-of kdc-realm-configuration?))
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(define (serialize-kdc-realm-configuration realm)
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#~(string-append " "
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#$(kdc-realm-configuration-name realm) " = {\n"
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#$(serialize-configuration realm
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kdc-realm-configuration-fields)
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" }\n"))
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(define serialize-boolean
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(serialize-field (lambda (val)
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(if val "true" "false")) " "))
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(define serialize-number
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(serialize-field number->string " "))
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(define-configuration kldap-configuration
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(db_library (string "kldap") "db library to use")
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(disable_last_success (boolean #f) "disable last success field")
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(disable_lockout (boolean #f) "disable lockout field")
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(ldap_kdc_dn (string "uid=kdc,dc=example,dc=com")
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"dn to bind for kdc operations")
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(ldap_kadmind_dn (string "uid=kadmind,dc=example,dc=com")
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"dn to bind for kadmin operations")
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(ldap_service_password_file maybe-string
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"file that stores the passwords for the ldap bind dns")
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(ldap_servers (string "ldap://example.com") "ldap server url")
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(ldap_conns_per_server (number 5) "number of connections per ldap server"))
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(define (serialize-list-of-kdc-realm-configuration field-name value)
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#~(string-join (list "[realms]"
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#$@(map (lambda (realm)
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(serialize-kdc-realm-configuration realm))
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value)) "\n"))
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(define (dbmodule? val)
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(if (list? val)
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(let ((name (car val))
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(config (cdr val)))
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(if (string? name)
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(or (kldap-configuration? config)) #f))))
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(define list-of-dbmodules?
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(list-of dbmodule?))
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(define (serialize-dbmodule dbmodule)
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(let ((name (car dbmodule))
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(config (cdr dbmodule)))
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#~(string-append " "
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#$name " = {\n"
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#$(or (if (kldap-configuration? config)
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(serialize-configuration config
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kldap-configuration-fields) #f) "") " }\n")))
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(define (serialize-list-of-dbmodules field-name value)
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#~(string-join (list "[dbmodules]"
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#$@(map (lambda (dbmodule)
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(serialize-dbmodule dbmodule)) value)) "\n"))
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(define list-of-strings?
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(list-of string?))
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(define (serialize-list-of-strings field-name value)
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#~(string-append "["
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#$(symbol->string field-name) "]\n"
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#$(string-join (map (cut string-append " " <>) value) "\n")
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"\n"))
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(define-maybe list-of-strings)
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(define-configuration kdc-configuration
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(krb5 (file-like mit-krb5-ldap) "krb5 package to use" serialize-none)
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(pkinit_anchors (string "DIR:/run/current-system/profile/etc/ssl/certs/")
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"CA certificate directory/file"
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(serialize-field (lambda (x)
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x) " "))
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(kdc_ports (list-of-ports '(750 88)) "list of ports to listen on")
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(realms (list-of-kdc-realm-configuration '())
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"Realms to configure the KDC with")
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(logging maybe-list-of-strings "extra logging lines")
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(dbdefaults maybe-list-of-strings "extra dbdefault lines")
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(dbmodules (list-of-dbmodules '()) "dbmodules to configure"))
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(define (serialize-kdc-configuration configuration)
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(mixed-text-file "kdc.conf"
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#~(string-append "[kdcdefaults]\n"
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#$(serialize-configuration configuration
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kdc-configuration-fields))))
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(define (kdc-accounts configuration)
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(list (user-group
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(name "kerberos")
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(system? #t))
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(user-account
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(name "kerberos")
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(group "kerberos")
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(system? #t)
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(comment "kdc service account")
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(home-directory "/var/lib/kerberos/")
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(shell #~(string-append #$shadow "/sbin/nologin")))))
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(define (kdc-activation configuration)
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#~(begin
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(let ((user (getpw "kerberos"))
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(group (getgr "kerberos")))
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(mkdir-p/perms "/var/lib/kerberos" user 488))))
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(define (kdc-etc configuration)
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`(("kdc.conf" ,(serialize-kdc-configuration configuration))))
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; TODO: have to stash the KDC master key with `KRB5_KDC_PROFILE=/etc/kdc.conf kdb5_util stash` on first boot
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(define (kdc-shepherd configuration)
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(list (shepherd-service (documentation "")
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(provision '(kdc))
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(requirement '(networking user-processes))
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(start #~(make-forkexec-constructor (list #$(file-append
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(kdc-configuration-krb5
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configuration)
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"/sbin/krb5kdc")
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"-n" "-P"
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"/run/krb5kdc.pid")
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#:environment-variables
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(list (string-append
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"LD_LIBRARY_PATH=${LD_LIBRARY_PATH}:"
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#$(kdc-configuration-krb5
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configuration)
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"/lib/krb5/plugins/kdb")
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"SSL_CERT_DIR=/etc/ssl/certs"
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"KRB5_KDC_PROFILE=/etc/kdc.conf")
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#:user "root"
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#:group "root"))
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(stop #~(make-kill-destructor)))
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(shepherd-service (documentation "")
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(provision '(kadmind))
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(requirement '(networking user-processes))
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(start #~(make-forkexec-constructor (list #$(file-append
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(kdc-configuration-krb5
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configuration)
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"/sbin/kadmind")
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"-nofork" "-P"
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"/run/kadmind.pid")
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#:environment-variables
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(list (string-append
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"LD_LIBRARY_PATH=${LD_LIBRARY_PATH}:"
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#$(kdc-configuration-krb5
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configuration)
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"/lib/krb5/plugins/kdb")
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"SSL_CERT_DIR=/etc/ssl/certs"
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"KRB5_KDC_PROFILE=/etc/kdc.conf")
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#:user "root"
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#:group "root"))
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(stop #~(make-kill-destructor)))))
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(define kdc-service-type
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(service-type (name 'kdc-service)
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(description "KDC service")
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(extensions (list (service-extension activation-service-type
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kdc-activation)
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(service-extension
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shepherd-root-service-type kdc-shepherd)
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(service-extension account-service-type
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kdc-accounts)
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(service-extension etc-service-type kdc-etc)))
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(default-value (kdc-configuration))))
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(define %kerberos-dn
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"uid=kerberos,ou=system,ou=accounts,dc=metznet,dc=ca")
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(define-public kerberos-services
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(append (list (service kdc-service-type
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(kdc-configuration (dbdefaults '("ldap_kerberos_container_dn = cn=kerberos,dc=metznet,dc=ca"))
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(logging '("kdc = SYSLOG:DEBUG:DAEMON"))
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(dbmodules (list (cons
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"openldap_ldapconf"
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(kldap-configuration
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(ldap_kdc_dn
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%kerberos-dn)
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(ldap_kadmind_dn
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%kerberos-dn)
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(ldap_servers
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"ldaps://ldap.metznet.ca")
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(ldap_service_password_file
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"/var/lib/kerberos/service.keyfile")))))
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(realms (list (kdc-realm-configuration
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(name "METZNET.CA")
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(database_module
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"openldap_ldapconf")
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(default_principal_flags
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"+preauth")
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(acl_file (plain-file
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"kadm5.acl"
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"*/admin@METZNET.CA *\n")))))))
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(service certbot-service-type
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(certbot-configuration (email "admin@metznet.ca")
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(certificates (list (certificate-configuration
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(domains '
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("kerberos.metznet.ca"))))))))
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%metznet-server-services))
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(define-public kerberos.metznet.ca
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(operating-system
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(inherit %metznet-base-server-system)
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(host-name "kerberos.metznet.ca")
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(services
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kerberos-services)))
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