[Dev] [PATCH] pacman: secure options for gpg

[Nicolás Reynolds]

This patch adds some secure options for gpg and a cron script that keeps
keys updated.

---
 libre/pacman/PKGBUILD                 | 20 +++++++++-----
 libre/pacman/gpg.conf                 | 50 +++++++++++++++++++++++++++++++++++
 libre/pacman/refresh-pacman-keys      |  3 +++
 libre/pacman/sks-keyservers.netCA.pem | 32 ++++++++++++++++++++++
 4 files changed, 98 insertions(+), 7 deletions(-)
 create mode 100644 libre/pacman/gpg.conf
 create mode 100644 libre/pacman/refresh-pacman-keys
 create mode 100644 libre/pacman/sks-keyservers.netCA.pem

diff --git a/libre/pacman/PKGBUILD b/libre/pacman/PKGBUILD
index 8fb5877..f446e6e 100644
--- a/libre/pacman/PKGBUILD
+++ b/libre/pacman/PKGBUILD
@@ -24,13 +24,10 @@ source=(ftp://ftp.archlinux.org/other/pacman/$pkgname-$pkgver.tar.gz{,.sig}
         pacman.conf.i686
         pacman.conf.x86_64
         pacman.conf.mips64el
-        makepkg.conf)
-md5sums=('063c8b0ff6bdf903dc235445525627cd'
-         'SKIP'
-         '688feb0a552f42643a76f72e7198bfe4'
-         '77c5fd379e73cf86fc08a4bd5c4b1ba1'
-         '9e0c64937ef751ae4273fa4d73381484'
-         'f0f310df411f943dbc4e2dd376c88662')
+        makepkg.conf
+        gpg.conf
+        sks-keyservers.netCA.pem
+        refresh-pacman-keys)
 
 build() {
   cd "$pkgname-$pkgver"
@@ -96,4 +93,13 @@ package() {
   done
 
   install -Dm644 contrib/PKGBUILD.vim "$pkgdir/usr/share/vim/vimfiles/syntax/PKGBUILD.vim"
+
+  install -Dm755 "${srcdir}/refresh-pacman-keys" \
+                 "${pkgdir}/etc/cron.weekly/refresh-pacman-keys"
+
+  install -Dm644 "${srcdir}/sks-keyservers.netCA.pem" \
+                 "${pkgdir}/etc/pacman.d/sks-keyservers.netCA.pem"
+
+  install -Dm644 "${srcdir}/gpg.conf" \
+                 "${pkgdir}/etc/pacman.d/gpg.conf"
 }
diff --git a/libre/pacman/gpg.conf b/libre/pacman/gpg.conf
new file mode 100644
index 0000000..7fc6fc6
--- /dev/null
+++ b/libre/pacman/gpg.conf
@@ -0,0 +1,50 @@
+# pacman-key default options
+no-greeting
+no-permission-warning
+lock-never
+keyserver-options timeout=20
+
+# From duraconf
+# personal digest preferences
+personal-digest-preferences SHA512
+
+# message digest algorithm used when signing a key
+cert-digest-algo SHA512
+
+# Set the list of default preferences to string.
+# used for new keys and default for "setpref"
+default-preference-list SHA512 SHA384 SHA256 SHA224 AES256 AES192 AES CAST5 ZLIB BZIP2 ZIP Uncompressed
+
+# From
+# https://crabgrass.riseup.net/riseuplabs+paow/openpgp-best-practices
+# Only use secure keyservers
+keyserver hkps://hkps.pool.sks-keyservers.net
+keyserver-options ca-cert-file=~/.gnupg/sks-keyservers.netCA.pem
+keyserver-options no-honor-keyserver-url
+
+# when outputting certificates, view user IDs distinctly from keys:
+fixed-list-mode
+
+# short-keyids are trivially spoofed; it's easy to create a long-keyid
+# collision; if you care about strong key identifiers, you always want
+# to see the fingerprint:
+keyid-format 0xlong
+fingerprint
+
+# when multiple digests are supported by all recipients, choose the
+# strongest one:
+personal-digest-preferences SHA512 SHA384 SHA256 SHA224
+
+# If you use a graphical environment (and even if you don't)
+# you should be using an agent: (similar arguments as
+# https://www.debian-administration.org/users/dkg/weblog/64)
+use-agent
+
+# You should always know at a glance which User IDs gpg thinks are
+# legitimately bound to the keys in your keyring:
+verify-options show-uid-validity
+list-options show-uid-validity
+
+# include an unambiguous indicator of which key made a signature: (see
+# http://thread.gmane.org/gmane.mail.notmuch.general/3721/focus=7234)
+sig-notation issuer-fpr at notations.openpgp.fifthhorseman.net=%g
diff --git a/libre/pacman/refresh-pacman-keys b/libre/pacman/refresh-pacman-keys
new file mode 100644
index 0000000..e96dc34
--- /dev/null
+++ b/libre/pacman/refresh-pacman-keys
@@ -0,0 +1,3 @@
+#!/bin/bash
+
+pacman-key --refresh-keys
diff --git a/libre/pacman/sks-keyservers.netCA.pem b/libre/pacman/sks-keyservers.netCA.pem
new file mode 100644
index 0000000..24a2ad2
--- /dev/null
+++ b/libre/pacman/sks-keyservers.netCA.pem
@@ -0,0 +1,32 @@
+-----BEGIN CERTIFICATE-----
+MIIFizCCA3OgAwIBAgIJAK9zyLTPn4CPMA0GCSqGSIb3DQEBBQUAMFwxCzAJBgNV
+BAYTAk5PMQ0wCwYDVQQIDARPc2xvMR4wHAYDVQQKDBVza3Mta2V5c2VydmVycy5u
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+WrpoKqrwGwTpRUCMhYIUt65hsTxCiJJ5nKe39h46sg==
+-----END CERTIFICATE-----
-- 
1.9.1