gnu: libressl: Remove search paths.

Unlike OpenSSL, LibreSSL hardcode it's certificate bundle and doesn't
allow to specify it through a environment variable.

* gnu/packages/tls.scm (libressl)[configure-flags]: Specify OpenSSL
configuration directory.
[native-search-paths]: Remove it.
* gnu/packages/ntp.scm (openntpd)[configure-flags]: Adjust CAcert
location.

gnu/packages/ntp.scm

@@ -7,6 +7,7 @@
 ;;; Copyright © 2018–2021 Tobias Geerinckx-Rice <me@tobias.gr>
 ;;; Copyright © 2019 Maxim Cournoyer <maxim.cournoyer@gmail.com>
 ;;; Copyright © 2021 Marius Bakke <marius@gnu.org>
+;;; Copyright © 2021 Brice Waegeneire <brice@waegenei.re>
 ;;;
 ;;; This file is part of GNU Guix.
 ;;;
@@ -187,11 +188,14 @@ computers over a network.")
                 "0ijsylc7a4jlpxsqa0jq1w1c7333id8pcakzl7a5749ria1xp0l5"))))
     (build-system gnu-build-system)
     (arguments
-     '(#:configure-flags `( "--with-privsep-user=ntpd"
+     `(#:configure-flags
+       (let* ((libressl (assoc-ref %build-inputs "libressl"))
+             (libressl-version ,(package-version libressl)))
+         (list "--with-privsep-user=ntpd"
                "--localstatedir=/var"
-                            ,(string-append "--with-cacert="
+               (string-append "--with-cacert=" libressl
-                                            (assoc-ref %build-inputs "libressl")
+                              "/share/libressl-" libressl-version
-                                            "/etc/ssl/cert.pem"))
+                              "/cert.pem")))
        #:phases
        (modify-phases %standard-phases
          (add-after 'unpack 'modify-install-locations

gnu/packages/tls.scm

@@ -16,6 +16,7 @@
 ;;; Copyright © 2019 Mathieu Othacehe <m.othacehe@gmail.com>
 ;;; Copyright © 2020 Jan (janneke) Nieuwenhuizen <janneke@gnu.org>
 ;;; Copyright © 2021 Solene Rapenne <solene@perso.pw>
+;;; Copyright © 2021 Brice Waegeneire <brice@waegenei.re>
 ;;;
 ;;; This file is part of GNU Guix.
 ;;;
@@ -612,21 +613,19 @@ required structures.")
                 "0rihprcgxsydsbcqgd1952k2cfn4jmp7rlyp1c6sglfc6rdmcwd4"))))
     (build-system gnu-build-system)
     (arguments
+     `(#:configure-flags
+       (list
         ;; Do as if 'getentropy' were missing: Linux kernels before 3.17 lack its
         ;; underlying 'getrandom' system call and ENOSYS isn't properly handled.
         ;; See <https://lists.gnu.org/archive/html/guix-devel/2017-04/msg00235.html>.
-     '(#:configure-flags '("ac_cv_func_getentropy=no"
+        "ac_cv_func_getentropy=no"
+        ;; FIXME It's using it's own bundled certificate, instead it should
+        ;; behave like OpenSSL by using environment variables.
+        (string-append "--with-openssldir=" %output
+                       "/share/libressl-"
+                       ,(package-version this-package))
         ;; Provide a TLS-enabled netcat.
         "--enable-nc")))
-    (native-search-paths
-     (list (search-path-specification
-            (variable "SSL_CERT_DIR")
-            (separator #f)              ;single entry
-            (files '("etc/ssl/certs")))
-           (search-path-specification
-            (variable "SSL_CERT_FILE")
-            (separator #f)              ;single entry
-            (files '("etc/ssl/certs/ca-certificates.crt")))))
     (home-page "https://www.libressl.org/")
     (synopsis "SSL/TLS implementation")
     (description "LibreSSL is a version of the TLS/crypto stack, forked from