spec: use %{gpgverify} to verify the sources

bensberg.pgp

@@ -0,0 +1,51 @@
+-----BEGIN PGP PUBLIC KEY BLOCK-----
+
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+WVynD/YeN/rgZpx3Jh1ccMw=
+=cs04
+-----END PGP PUBLIC KEY BLOCK-----

nano.spec

@@ -11,8 +11,15 @@ Version:         6.3
 Release:         2%{?dist}
 License:         GPLv3+
 URL:             https://www.nano-editor.org
-Source:          https://www.nano-editor.org/dist/latest/%{name}-%{version}.tar.xz
-Source2:         nanorc
+
+Source0:         https://www.nano-editor.org/dist/latest/%{name}-%{version}.tar.xz
+Source1:         https://www.nano-editor.org/dist/latest/%{name}-%{version}.tar.xz.asc
+# gpg --keyserver pgp.mit.edu --recv-key BFD009061E535052AD0DF2150D28D4D2A0ACE884
+# gpg --output bensberg.pgp --armor --export bensberg@telfort.nl
+Source2:         bensberg.pgp
+
+# Additional sources
+Source3:        nanorc
 
 # Shell snippets for default-editor setup
 Source11:        nano-default-editor.sh
@@ -23,6 +30,7 @@ BuildRequires:   file-devel
 BuildRequires:   gettext-devel
 BuildRequires:   gcc
 BuildRequires:   git
+BuildRequires:   gnupg2
 BuildRequires:   groff
 BuildRequires:   make
 BuildRequires:   ncurses-devel
@@ -59,6 +67,7 @@ who don't have nano as a default editor during upgrade.
 %endif
 
 %prep
+%{gpgverify} --keyring='%{SOURCE2}' --signature='%{SOURCE1}' --data='%{SOURCE0}'
 %autosetup -S git
 
 %build
@@ -73,7 +82,7 @@ cd build
 # - enable syntax highlighting by default (#1270712)
 sed -e 's/^#.*set speller.*$/set speller "hunspell"/' \
     -e 's|^# \(include "/usr/share/nano/\*.nanorc"\)|\1|' \
-    %{SOURCE2} doc/sample.nanorc > ./nanorc
+    %{SOURCE3} doc/sample.nanorc > ./nanorc
 
 %install
 cd build