cfg80211: ship certificates as hex files

Not only does this remove the need for the hexdump code in most
normal kernel builds (still there for the extra directory), but
it also removes the need to ship binary files, which apparently
is somewhat problematic, as Randy reported.

While at it, also add the generated files to clean-files.
Reported-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

net/wireless/Makefile

@@ -23,27 +23,14 @@ ifneq ($(CONFIG_CFG80211_EXTRA_REGDB_KEYDIR),)
 cfg80211-y += extra-certs.o
 endif
 
-$(obj)/shipped-certs.c: $(wildcard $(srctree)/$(src)/certs/*.x509)
+$(obj)/shipped-certs.c: $(wildcard $(srctree)/$(src)/certs/*.hex)
 	@$(kecho) "  GEN     $@"
-	@(set -e; \
-	  allf=""; \
-	  for f in $^ ; do \
-	      # similar to hexdump -v -e '1/1 "0x%.2x," "\n"' \
-	      thisf=$$(od -An -v -tx1 < $$f | \
-	                   sed -e 's/ /\n/g' | \
-	                   sed -e 's/^[0-9a-f]\+$$/\0/;t;d' | \
-	                   sed -e 's/^/0x/;s/$$/,/'); \
-	      # file should not be empty - maybe command substitution failed? \
-	      test ! -z "$$thisf";\
-	      allf=$$allf$$thisf;\
-	  done; \
-	  ( \
-	      echo '#include "reg.h"'; \
+	@(echo '#include "reg.h"'; \
 	  echo 'const u8 shipped_regdb_certs[] = {'; \
-	      echo "$$allf"; \
+	  cat $^ ; \
 	  echo '};'; \
 	  echo 'unsigned int shipped_regdb_certs_len = sizeof(shipped_regdb_certs);'; \
-	  ) > $@)
+	 ) > $@
 
 $(obj)/extra-certs.c: $(CONFIG_CFG80211_EXTRA_REGDB_KEYDIR:"%"=%) \
 		      $(wildcard $(CONFIG_CFG80211_EXTRA_REGDB_KEYDIR:"%"=%)/*.x509)
@@ -67,3 +54,5 @@ $(obj)/extra-certs.c: $(CONFIG_CFG80211_EXTRA_REGDB_KEYDIR:"%"=%) \
 	      echo '};'; \
 	      echo 'unsigned int extra_regdb_certs_len = sizeof(extra_regdb_certs);'; \
 	  ) > $@)
+
+clean-files += shipped-certs.c extra-certs.c

net/wireless/certs/sforshee.hex

+/* Seth Forshee's regdb certificate */
+0x30, 0x82, 0x02, 0xa4, 0x30, 0x82, 0x01, 0x8c,
+0x02, 0x09, 0x00, 0xb2, 0x8d, 0xdf, 0x47, 0xae,
+0xf9, 0xce, 0xa7, 0x30, 0x0d, 0x06, 0x09, 0x2a,
+0x86, 0x48, 0x86, 0xf7, 0x0d, 0x01, 0x01, 0x0b,
+0x05, 0x00, 0x30, 0x13, 0x31, 0x11, 0x30, 0x0f,
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+0x18, 0x0f, 0x32, 0x31, 0x31, 0x37, 0x30, 0x39,
+0x31, 0x32, 0x31, 0x39, 0x34, 0x30, 0x33, 0x35,
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+0x01, 0x0a, 0x02, 0x82, 0x01, 0x01, 0x00, 0xb5,
+0x40, 0xe3, 0x9c, 0x28, 0x84, 0x39, 0x03, 0xf2,
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+0x9f, 0x7c, 0x6a, 0x52, 0xc2, 0x03, 0x2a, 0x2d,
+0x7e, 0x66, 0xf4, 0x1e, 0xb3, 0x12, 0x70, 0x20,
+0x5b, 0xd4, 0x97, 0x32, 0x3d, 0x71, 0x8b, 0x3b,
+0x1b, 0x08, 0x17, 0x14, 0x6b, 0x61, 0xc4, 0x57,
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+0x31, 0xf1, 0x36, 0xa2, 0x9c, 0x63, 0xc6, 0x65,
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