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From:   Russell Coker <russell@coker.com.au>
To:     "selinux-refpolicy@vger.kernel.org" 
        <selinux-refpolicy@vger.kernel.org>
Reply-To: russell@coker.com.au
Subject: certbot patch
Date:   Wed, 12 Feb 2020 14:08:43 +1100
Message-ID: <3935693.2ZXyPmJE1a@xev>
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This patch against the git refpolicy adds a domain for the certbot client for 
letsencrypt.  This allows automatic renewal of certbot certificates.

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My Documents Blog    http://doc.coker.com.au/

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Index: refpolicy-2.20200209/policy/modules/services/certbot.fc
===================================================================
--- /dev/null
+++ refpolicy-2.20200209/policy/modules/services/certbot.fc
@@ -0,0 +1,4 @@
+/usr/bin/certbot	--	gen_context(system_u:object_r:certbot_exec_t,s0)
+/usr/bin/letsencrypt	--	gen_context(system_u:object_r:certbot_exec_t,s0)
+/var/log/letsencrypt(/.*)?	gen_context(system_u:object_r:certbot_log_t,s0)
+/var/lib/letsencrypt(/.*)?	gen_context(system_u:object_r:certbot_var_lib_t,s0)
Index: refpolicy-2.20200209/policy/modules/services/certbot.if
===================================================================
--- /dev/null
+++ refpolicy-2.20200209/policy/modules/services/certbot.if
@@ -0,0 +1,46 @@
+## <summary>SSL certificate requesting tool certbot AKA letsencrypt.</summary>
+
+########################################
+## <summary>
+##      Execute certbot/letsencrypt in the certbot
+##      domain.
+## </summary>
+## <param name="domain">
+##      <summary>
+##      Domain allowed to transition.
+##      </summary>
+## </param>
+#
+interface(`certbot_domtrans',`
+	gen_require(`
+		type certbot_t, certbot_exec_t;
+	')
+
+	domtrans_pattern($1, certbot_exec_t, certbot_t)
+')
+
+########################################
+## <summary>
+##      Execute certbot/letsencrypt in the certbot
+##      domain, and allow the specified role
+##      the firstboot domain.
+## </summary>
+## <param name="role">
+##      <summary>
+##      Role allowed access.
+##      </summary>
+## </param>
+## <param name="domain">
+##      <summary>
+##      Domain allowed to transition.
+##      </summary>
+## </param>
+#
+interface(`certbot_run',`
+	gen_require(`
+		type certbot_t;
+	')
+
+	certbot_domtrans($2)
+	role $1 types certbot_t;
+')
Index: refpolicy-2.20200209/policy/modules/services/certbot.te
===================================================================
--- /dev/null
+++ refpolicy-2.20200209/policy/modules/services/certbot.te
@@ -0,0 +1,99 @@
+policy_module(certbot, 1.0.0)
+
+########################################
+#
+# Declarations
+#
+
+type certbot_t;
+type certbot_exec_t;
+init_daemon_domain(certbot_t, certbot_exec_t)
+
+type certbot_log_t;
+logging_log_file(certbot_log_t)
+
+type certbot_var_run_t;
+files_pid_file(certbot_var_run_t)
+
+type certbot_tmp_t;
+files_tmp_file(certbot_tmp_t)
+
+type certbot_tmpfs_t;
+files_tmpfs_file(certbot_tmpfs_t)
+
+type certbot_var_lib_t;
+files_type(certbot_var_lib_t)
+
+########################################
+#
+# Local policy
+#
+
+allow certbot_t self:fifo_file { getattr ioctl read write };
+
+allow certbot_t self:capability { chown dac_override sys_resource };
+
+# this is for certbot to have write-exec memory, I know it is bad
+allow certbot_t self:process execmem;
+allow certbot_t certbot_tmp_t:file { map execute };
+allow certbot_t certbot_tmpfs_t:file { map execute };
+allow certbot_t certbot_var_run_t:file { map execute };
+
+kernel_search_fs_sysctls(certbot_t)
+
+allow certbot_t self:tcp_socket all_tcp_socket_perms;
+allow certbot_t self:netlink_route_socket create_netlink_socket_perms;
+corenet_tcp_bind_generic_node(certbot_t)
+corenet_tcp_connect_http_port(certbot_t)
+
+# bind to http port for standalone mode
+corenet_tcp_bind_http_port(certbot_t)
+
+allow certbot_t self:udp_socket all_udp_socket_perms;
+sysnet_read_config(certbot_t)
+files_read_etc_files(certbot_t)
+
+# for /usr/bin/x86_64-linux-gnu-gcc-8 why?
+corecmd_exec_bin(certbot_t)
+# for /usr/lib/gcc/x86_64-linux-gnu/8/collect2
+libs_exec_lib_files(certbot_t)
+
+libs_exec_ldconfig(certbot_t)
+
+apache_search_config(certbot_t)
+
+# for bin_t map
+corecmd_bin_entry_type(certbot_t)
+corecmd_list_bin(certbot_t)
+miscfiles_read_localization(certbot_t)
+
+miscfiles_read_generic_certs(certbot_t)
+miscfiles_manage_generic_tls_privkey_dirs(certbot_t)
+miscfiles_manage_generic_tls_privkey_files(certbot_t)
+miscfiles_manage_generic_tls_privkey_lnk_files(certbot_t)
+
+manage_files_pattern(certbot_t, certbot_var_run_t, certbot_var_run_t)
+files_pid_filetrans(certbot_t, certbot_var_run_t, file)
+
+logging_search_logs(certbot_t)
+allow certbot_t certbot_log_t:dir manage_dir_perms;
+allow certbot_t certbot_log_t:file manage_file_perms;
+
+files_search_var_lib(certbot_t)
+manage_dirs_pattern(certbot_t, certbot_var_lib_t, certbot_var_lib_t)
+manage_files_pattern(certbot_t, certbot_var_lib_t, certbot_var_lib_t)
+
+manage_files_pattern(certbot_t, certbot_tmp_t, certbot_tmp_t)
+files_tmp_filetrans(certbot_t, certbot_tmp_t, { file })
+
+manage_files_pattern(certbot_t, certbot_tmpfs_t, certbot_tmpfs_t)
+fs_tmpfs_filetrans(certbot_t, certbot_tmpfs_t, { file })
+
+domain_use_interactive_fds(certbot_t)
+userdom_use_user_ptys(certbot_t)
+userdom_dontaudit_search_user_home_dirs(certbot_t)
+
+optional_policy(`
+	# for writing to webroot
+	apache_manage_sys_content(certbot_t)
+')
Index: refpolicy-2.20200209/policy/modules/system/miscfiles.if
===================================================================
--- refpolicy-2.20200209.orig/policy/modules/system/miscfiles.if
+++ refpolicy-2.20200209/policy/modules/system/miscfiles.if
@@ -254,6 +254,26 @@ interface(`miscfiles_manage_generic_tls_
 
 ########################################
 ## <summary>
+##	Manage generic SSL/TLS private
+##	keys.
+## </summary>
+## <param name="domain">
+##	<summary>
+##	Domain allowed access.
+##	</summary>
+## </param>
+## <rolecap/>
+#
+interface(`miscfiles_manage_generic_tls_privkey_lnk_files',`
+	gen_require(`
+		type tls_privkey_t;
+	')
+
+	manage_lnk_files_pattern($1, tls_privkey_t, tls_privkey_t)
+')
+
+########################################
+## <summary>
 ##	Read fonts.
 ## </summary>
 ## <param name="domain">

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