package/macosx: enhanced the codesign script to add a designated signature to...

package/macosx: enhanced the codesign script to add a designated signature to enhance its compatibility

Note 3 things

 - the included hashes are common knowledge, non-exploitable and hence don't constitute a security issue

 - you need a valid Developer ID private key to create GateKeeper compatible signatures

 - If you don't use VideoLAN's Dev ID, that's noticable but doesn't limit the app's behavior in any detail.

This commit also limits the signing process to the compiled lua scripts and no longer signs the entire lua folder since this would limit the usage experience and it isn't reasonable either.
(cherry picked from commit 41e20140b3bd4482cb02fe6eede5da471e57859d)

extras/package/macosx/codesign.sh

@@ -33,11 +33,12 @@ OPTIONS:
    -h            Show this help
    -i            Identity to use
    -t            Entitlements file to use
+   -g            Enable additional magic
 EOF
 
 }
 
-while getopts "hi:t:" OPTION
+while getopts "hi:t:g" OPTION
 do
      case $OPTION in
          h)
@@ -50,6 +51,9 @@ do
          t)
              OPTIONS="--entitlements $OPTARG"
          ;;
+         g)
+             GK="yes"
+         ;;
      esac
 done
 shift $(($OPTIND - 1))
@@ -59,18 +63,32 @@ if [ "x$1" != "x" ]; then
     exit 1
 fi
 
-info "Signing the executable"
+if test -z "$GK"
+then
+    info "Signing the executable"
+    codesign --force --sign "$IDENTITY" $OPTIONS VLC.app/Contents/MacOS/VLC
+
+    info "Signing the modules"
+    find VLC.app/Contents/MacOS/plugins/* -type f -exec codesign --force -s "$IDENTITY" $OPTIONS '{}' \;
 
-codesign -s "$IDENTITY" $OPTIONS VLC.app/Contents/MacOS/VLC
+    info "Signing the libraries"
+    find VLC.app/Contents/MacOS/lib/* -type f -exec codesign --force -s "$IDENTITY" $OPTIONS '{}' \;
 
-info "Signing the modules"
-find VLC.app/Contents/MacOS/plugins/* -type f -exec codesign -s "$IDENTITY" $OPTIONS '{}' \;
+    info "Signing the lua stuff"
+    find VLC.app/Contents/MacOS/share/lua/* -name *luac -type f -exec codesign --force -s "$IDENTITY" $OPTIONS '{}' \;
+else
+    info "Signing the executable"
+    codesign --force --sign "$IDENTITY" $OPTIONS --requirements "=designated => anchor apple generic  and identifier \"org.videolan.vlc\" and ((cert leaf[field.1.2.840.113635.100.6.1.9] exists) or ( certificate 1[field.1.2.840.113635.100.6.2.6] exists and certificate leaf[field.1.2.840.113635.100.6.1.13] exists  and certificate leaf[subject.OU] = \"75GAHG3SZQ\" ))" VLC.app/Contents/MacOS/VLC
 
-info "Signing the libraries"
-find VLC.app/Contents/MacOS/lib/* -type f -exec codesign -s "$IDENTITY" $OPTIONS '{}' \;
+    info "Signing the modules"
+    find VLC.app/Contents/MacOS/plugins/* -type f -exec codesign --force -s "$IDENTITY" $OPTIONS --requirements "=designated => anchor apple generic  and identifier \"org.videolan.vlc\" and ((cert leaf[field.1.2.840.113635.100.6.1.9] exists) or ( certificate 1[field.1.2.840.113635.100.6.2.6] exists and certificate leaf[field.1.2.840.113635.100.6.1.13] exists  and certificate leaf[subject.OU] = \"75GAHG3SZQ\" ))" '{}' \;
 
-info "Signing the lua stuff"
-find VLC.app/Contents/MacOS/share/lua/* -type f -exec codesign -s "$IDENTITY" $OPTIONS '{}' \;
+    info "Signing the libraries"
+    find VLC.app/Contents/MacOS/lib/* -type f -exec codesign --force -s "$IDENTITY" $OPTIONS --requirements "=designated => anchor apple generic  and identifier \"org.videolan.vlc\" and ((cert leaf[field.1.2.840.113635.100.6.1.9] exists) or ( certificate 1[field.1.2.840.113635.100.6.2.6] exists and certificate leaf[field.1.2.840.113635.100.6.1.13] exists  and certificate leaf[subject.OU] = \"75GAHG3SZQ\" ))" '{}' \;
+
+    info "Signing the lua stuff"
+    find VLC.app/Contents/MacOS/share/lua/* -name *luac -type f -exec codesign --force -s "$IDENTITY" $OPTIONS --requirements "=designated => anchor apple generic  and identifier \"org.videolan.vlc\" and ((cert leaf[field.1.2.840.113635.100.6.1.9] exists) or ( certificate 1[field.1.2.840.113635.100.6.2.6] exists and certificate leaf[field.1.2.840.113635.100.6.1.13] exists  and certificate leaf[subject.OU] = \"75GAHG3SZQ\" ))" '{}' \;
+fi
 
 info "all items signed, validating..."
 
@@ -84,6 +102,6 @@ info "Validating libraries"
 find VLC.app/Contents/MacOS/lib/* -type f -exec codesign --verify '{}' \;
 
 info "Validating lua stuff"
-find VLC.app/Contents/MacOS/share/lua/* -type f -exec codesign --verify '{}' \;
+find VLC.app/Contents/MacOS/share/lua/* -name *luac -type f -exec codesign --verify '{}' \;
 
 info "Validation complete"