diff --git a/contrib/sigtest.sh b/contrib/sigtest.sh
new file mode 100644
index 00000000..2d1f04b2
--- /dev/null
+++ b/contrib/sigtest.sh
@@ -0,0 +1,40 @@
+#!/bin/sh
+
+if [ $# -eq 0 -o "-h" = "$1" -o "-help" = "$1" -o "--help" = "$1" ]; then
+    cat <<EOHELP
+Usage: $0 <public> <signed manifest>
+
+sigtest.sh checks a signed manifest to be approved by the public key
+passed in the file <public>.
+
+See also:
+ * ecdsautils in https://github.com/tcatm/ecdsautils
+ * http://gluon.readthedocs.org/en/latest/features/autoupdater.html
+
+EOHELP
+    exit 1
+fi
+ 
+PUBLIC=$1
+ 
+manifest=$2
+upper=$(mktemp)
+lower=$(mktemp)
+ 
+awk "BEGIN    { sep=0 }
+    /^---\$/ { sep=1; next }
+              { if(sep==0) print > \"$upper\";
+                else       print > \"$lower\"}" \
+    $manifest
+ 
+for line in $(cat $lower)
+do
+    ecdsaverify -s $line -p $(cat $PUBLIC|tr -d " \n") $upper
+    stat=$?
+    rm -f $upper $lower
+    if [ 0 -eq $stat ]; then
+        echo "[OK]"
+        exit 0
+    fi
+done
+echo "[Failure]"