From 01a95b2141e337dea15ad48e60a35c72a9b10205 Mon Sep 17 00:00:00 2001
From: Johannes Berg <johannes.berg@intel.com>
Date: Fri, 24 Nov 2017 09:35:25 +0100
Subject: [PATCH] cfg80211: select CRYPTO_SHA256 if needed
Git-commit: 01a95b2141e337dea15ad48e60a35c72a9b10205
Patch-mainline: v4.15-rc2
References: FATE#326294

When regulatory database certificates are built-in, they're
currently using the SHA256 digest algorithm, so add that to
the build in that case.

Also add a note that for custom certificates, one may need
to add the right algorithms.

Reported-by: Florian Fainelli <f.fainelli@gmail.com>
Tested-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Acked-by: Takashi Iwai <tiwai@suse.de>

---
 net/wireless/Kconfig |    7 +++++++
 1 file changed, 7 insertions(+)

--- a/net/wireless/Kconfig
+++ b/net/wireless/Kconfig
@@ -20,6 +20,10 @@ config CFG80211
 	tristate "cfg80211 - wireless configuration API"
 	depends on RFKILL || !RFKILL
 	select FW_LOADER
+	# may need to update this when certificates are changed and are
+	# using a different algorithm, though right now they shouldn't
+	# (this is here rather than below to allow it to be a module)
+	select CRYPTO_SHA256 if CFG80211_USE_KERNEL_REGDB_KEYS
 	---help---
 	  cfg80211 is the Linux wireless LAN (802.11) configuration API.
 	  Enable this if you have a wireless device.
@@ -83,6 +87,9 @@ config CFG80211_CERTIFICATION_ONUS
 	  you are a wireless researcher and are working in a controlled
 	  and approved environment by your local regulatory agency.
 
+	  Note that you need to also select the correct CRYPTO_<hash> modules
+	  for your certificates, and if cfg80211 is built-in they also must be.
+
 config CFG80211_REG_CELLULAR_HINTS
 	bool "cfg80211 regulatory support for cellular base station hints"
 	depends on CFG80211_CERTIFICATION_ONUS