diff --git a/apt/manifests/init.pp b/apt/manifests/init.pp
index a5b9b35..6a5c39c 100644
--- a/apt/manifests/init.pp
+++ b/apt/manifests/init.pp
@@ -7,6 +7,12 @@ class apt {
         group  => root,
     }
 
+    exec { "apt-get-update":
+        path        => "/bin:/usr/bin:/sbin:/usr/sbin",
+        command     => "apt-get update",
+        refreshonly => true,
+    }
+
 }
 
 
@@ -124,3 +130,78 @@ define apt::package($ensure, $source) {
     }
 
 }
+
+
+# Add apt key.
+#
+# === Parameters
+#
+#   $name:
+#       Key id.
+#   $keyserver:
+#       Name of keyserver.
+#
+# === Sample usage
+#
+# apt::key { "886DDD89":
+#     keyserver => "keys.gnupg.net",
+# }
+#
+define apt::key($keyserver) {
+
+    include apt
+
+    exec { "apt-key-add":
+        environment => $http_proxy ? {
+            ""      => undef,
+            default => "http_proxy=${http_proxy}",
+        },
+        path        => "/bin:/usr/bin:/sbin:/usr/sbin",
+        command     => "apt-key adv --keyserver ${keyserver} --recv ${name}",
+        unless      => "apt-key list | grep '\\b${name}\\b'",
+        notify      => Exec["apt-get-update"],
+    }
+
+}
+
+
+# Add apt repository.
+#
+# === Parameters
+#
+#   $name:
+#       Repository name.
+#   $source:
+#       Repository URL.
+#   $dist:
+#       Distribution name. Defaults to $lsbdistcodename.
+#   $components
+#       Repository components. Defaults to "main".
+#
+# === Sample usage
+#
+# apt::repo { "deb.torproject.org":
+#     source  => "http://deb.torproject.org/torproject.org",
+#     require => Apt::Key["886DDD89"],
+# }
+#
+define apt::repo($source, $dist="", $components="main") {
+
+    if $dist {
+        $dist_real = $dist
+    } else {
+        $dist_real = $lsbdistcodename
+    }
+
+    include apt
+
+    file { "/etc/apt/sources.list.d/${name}.list":
+        ensure  => present,
+        mode    => 0644,
+        owner   => root,
+        group   => root,
+        content => "deb ${source} ${dist_real} ${components}\ndeb-src ${source} ${dist_real} ${components}\n",
+        notify  => Exec["apt-get-update"],
+    }
+
+}