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-rwxr-xr-xpackage/base-files/files/lib/functions.sh16
1 files changed, 16 insertions, 0 deletions
diff --git a/package/base-files/files/lib/functions.sh b/package/base-files/files/lib/functions.sh
index 860fc04510..81176431d1 100755
--- a/package/base-files/files/lib/functions.sh
+++ b/package/base-files/files/lib/functions.sh
@@ -17,6 +17,22 @@ NO_EXPORT=1
LOAD_STATE=1
LIST_SEP=" "
+# xor multiple hex values of the same length
+xor() {
+ local val
+ local ret="0x$1"
+ local retlen=${#1}
+
+ shift
+ while [ -n "$1" ]; do
+ val="0x$1"
+ ret=$((ret ^ val))
+ shift
+ done
+
+ printf "%0${retlen}x" "$ret"
+}
+
append() {
local var="$1"
local value="$2"