From c0af3601fb87e6c695d07f0af1fbec8dcfdb2f71 Mon Sep 17 00:00:00 2001
From: Hannu Nyman <hannu.nyman@iki.fi>
Date: Fri, 19 Aug 2016 10:59:52 +0300
Subject: luci-mod-admin-full: show also sha256 checksum for sysupgrade images

Show also the sha256 checksum in addition to MD5 checksum to enable
image verification also for builds with only sha256 checksums.

If the 'sha256sum' command is not present in the system, the value
remains empty.

Note: The easiest way to get the 'sha256sum' command is to compile it
into busybox.

Signed-off-by: Hannu Nyman <hannu.nyman@iki.fi>
---
 modules/luci-mod-admin-full/luasrc/controller/admin/system.lua   | 5 +++++
 modules/luci-mod-admin-full/luasrc/view/admin_system/upgrade.htm | 3 ++-
 2 files changed, 7 insertions(+), 1 deletion(-)

diff --git a/modules/luci-mod-admin-full/luasrc/controller/admin/system.lua b/modules/luci-mod-admin-full/luasrc/controller/admin/system.lua
index fd6dda1c8..cf8cfb5d2 100644
--- a/modules/luci-mod-admin-full/luasrc/controller/admin/system.lua
+++ b/modules/luci-mod-admin-full/luasrc/controller/admin/system.lua
@@ -185,6 +185,10 @@ local function image_checksum(image)
 	return (luci.sys.exec("md5sum %q" % image):match("^([^%s]+)"))
 end
 
+local function image_sha256_checksum(image)
+	return (luci.sys.exec("sha256sum %q" % image):match("^([^%s]+)"))
+end
+
 local function supports_sysupgrade()
 	return nixio.fs.access("/lib/upgrade/platform.sh")
 end
@@ -268,6 +272,7 @@ function action_sysupgrade()
 		if image_supported(image_tmp) then
 			luci.template.render("admin_system/upgrade", {
 				checksum = image_checksum(image_tmp),
+				sha256ch = image_sha256_checksum(image_tmp),
 				storage  = storage_size(),
 				size     = (fs.stat(image_tmp, "size") or 0),
 				keep     = (not not http.formvalue("keep"))
diff --git a/modules/luci-mod-admin-full/luasrc/view/admin_system/upgrade.htm b/modules/luci-mod-admin-full/luasrc/view/admin_system/upgrade.htm
index 5ca0398e1..279af575c 100644
--- a/modules/luci-mod-admin-full/luasrc/view/admin_system/upgrade.htm
+++ b/modules/luci-mod-admin-full/luasrc/view/admin_system/upgrade.htm
@@ -24,7 +24,8 @@
 
 <fieldset class="cbi-section">
 	<ul>
-		<li><%:Checksum%>: <code><%=checksum%></code></li>
+		<li><%:Checksum MD5%>: <code><%=checksum%></code></li>
+		<li><%:Checksum SHA256%>: <code><%=sha256ch%></code></li>
 		<li><%:Size%>: <%
 			local w = require "luci.tools.webadmin"
 			write(w.byte_format(size))
-- 
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